add touch scrolling, fix scrollbar, fix appstore search

- when fireing an action, the action array may change. so the loop should break early as soon as an action is handled.
  this fixes the appstore search when pressing B.
- scrollbar no longer goes oob. fixes #76

currently, scrolling has no acceleration.

sphaira/CMakeLists.txt

@@ -51,13 +51,12 @@ add_executable(sphaira
     source/ui/notification.cpp
     source/ui/nvg_util.cpp
     source/ui/option_box.cpp
-    source/ui/option_list.cpp
     source/ui/popup_list.cpp
     source/ui/progress_box.cpp
     source/ui/scrollable_text.cpp
-    source/ui/scrollbar.cpp
     source/ui/sidebar.cpp
     source/ui/widget.cpp
+    source/ui/list.cpp
 
     source/app.cpp
     source/download.cpp

sphaira/include/app.hpp

@@ -33,7 +33,9 @@ enum class LaunchType {
     Forwader_Sphaira,
 };
 
+// todo: why is this global???
 void DrawElement(float x, float y, float w, float h, ThemeEntryID id);
+void DrawElement(const Vec4&, ThemeEntryID id);
 
 class App {
 public:
@@ -56,8 +58,8 @@ public:
     static void NotifyFlashLed();
 
     static auto GetThemeMetaList() -> std::span<ThemeMeta>;
-    static void SetTheme(u64 theme_index);
-    static auto GetThemeIndex() -> u64;
+    static void SetTheme(s64 theme_index);
+    static auto GetThemeIndex() -> s64;
 
     static auto GetDefaultImage(int* w = nullptr, int* h = nullptr) -> int;
 
@@ -143,7 +145,7 @@ public:
 
     Theme m_theme{};
     fs::FsPath theme_path{};
-    std::size_t m_theme_index{};
+    s64 m_theme_index{};
 
     bool m_quit{};
 

sphaira/include/ui/error_box.hpp

@@ -10,7 +10,6 @@ public:
     ErrorBox(Result code, const std::string& message);
 
     auto Update(Controller* controller, TouchInfo* touch) -> void override;
-    auto OnLayoutChange() -> void override;
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
 
 private:

sphaira/include/ui/list.hpp

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "ui/object.hpp"
+
+namespace sphaira::ui {
+
+struct List final : Object {
+    using Callback = std::function<void(NVGcontext* vg, Theme* theme, Vec4 v, s64 index)>;
+    using TouchCallback = std::function<void(s64 index)>;
+
+    List(s64 row, s64 page, const Vec4& pos, const Vec4& v, const Vec2& pad = {});
+
+    void OnUpdate(Controller* controller, TouchInfo* touch, s64 count, TouchCallback callback);
+
+    void Draw(NVGcontext* vg, Theme* theme, s64 count, Callback callback) const;
+
+    auto SetScrollBarPos(float x, float y, float h) {
+        m_scrollbar.x = x;
+        m_scrollbar.y = y;
+        m_scrollbar.h = h;
+    }
+
+    auto ScrollDown(s64& index, s64 step, s64 count) -> bool;
+    auto ScrollUp(s64& index, s64 step, s64 count) -> bool;
+
+    auto GetYoff() const {
+        return m_yoff;
+    }
+
+    void SetYoff(float y = 0) {
+        m_yoff = y;
+    }
+
+    auto GetMaxY() const {
+        return m_v.h + m_pad.y;
+    }
+
+private:
+    auto Draw(NVGcontext* vg, Theme* theme) -> void override {}
+    auto ClampY(float y, s64 count) const -> float;
+
+private:
+    const s64 m_row;
+    const s64 m_page;
+
+    Vec4 m_v;
+    Vec2 m_pad;
+
+    Vec4 m_scrollbar{};
+
+    // current y offset.
+    float m_yoff{};
+    // in progress y offset, used when scrolling.
+    float m_y_prog{};
+};
+
+} // namespace sphaira::ui

sphaira/include/ui/menus/appstore.hpp

@@ -2,6 +2,7 @@
 
 #include "ui/menus/menu_base.hpp"
 #include "ui/scrollable_text.hpp"
+#include "ui/list.hpp"
 #include "nro.hpp"
 #include "fs.hpp"
 #include <span>
@@ -77,7 +78,7 @@ struct EntryMenu final : MenuBase {
     // void OnFocusGained() override;
 
     void ShowChangelogAction();
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
 
     void UpdateOptions();
 
@@ -97,10 +98,10 @@ private:
     const LazyImage& m_default_icon;
     Menu& m_menu;
 
-    std::size_t m_index{}; // where i am in the array
+    s64 m_index{}; // where i am in the array
     std::vector<Option> m_options;
     LazyImage m_banner;
-    std::vector<LazyImage> m_screens;
+    std::unique_ptr<List> m_list;
 
     std::shared_ptr<ScrollableText> m_details;
     std::shared_ptr<ScrollableText> m_changelog;
@@ -149,7 +150,7 @@ struct FeedbackMenu final : MenuBase {
     void Draw(NVGcontext* vg, Theme* theme) override;
     void OnFocusGained() override;
 
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
     void ScanHomebrew();
     void Sort();
 
@@ -157,8 +158,7 @@ private:
     const std::vector<Entry>& m_package_entries;
     LazyImage& m_default_image;
     std::vector<FeedbackEntry> m_entries;
-    std::size_t m_start{};
-    std::size_t m_index{}; // where i am in the array
+    s64 m_index{}; // where i am in the array
     ImageDownloadState m_repo_download_state{ImageDownloadState::None};
 };
 
@@ -170,7 +170,7 @@ struct Menu final : MenuBase {
     void Draw(NVGcontext* vg, Theme* theme) override;
     void OnFocusGained() override;
 
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
     void ScanHomebrew();
     void Sort();
 
@@ -201,19 +201,19 @@ private:
     SortType m_sort{SortType::SortType_Updated};
     OrderType m_order{OrderType::OrderType_Decending};
 
-    std::size_t m_start{};
-    std::size_t m_index{}; // where i am in the array
+    s64 m_index{}; // where i am in the array
     LazyImage m_default_image;
     LazyImage m_update;
     LazyImage m_get;
     LazyImage m_local;
     LazyImage m_installed;
     ImageDownloadState m_repo_download_state{ImageDownloadState::None};
+    std::unique_ptr<List> m_list;
 
     std::string m_search_term;
     std::string m_author_term;
-    u64 m_entry_search_jump_back{};
-    u64 m_entry_author_jump_back{};
+    s64 m_entry_search_jump_back{};
+    s64 m_entry_author_jump_back{};
     bool m_is_search{};
     bool m_is_author{};
     bool m_dirty{}; // if set, does a sort

sphaira/include/ui/menus/file_viewer.hpp

@@ -23,8 +23,8 @@ private:
 
     std::unique_ptr<ScrollableText> m_scroll_text;
 
-    std::size_t m_start{};
-    std::size_t m_index{}; // where i am in the array
+    s64 m_start{};
+    s64 m_index{}; // where i am in the array
 };
 
 } // namespace sphaira::ui::menu::fileview

sphaira/include/ui/menus/filebrowser.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ui/menus/menu_base.hpp"
+#include "ui/list.hpp"
 #include "nro.hpp"
 #include "fs.hpp"
 #include "option.hpp"
@@ -92,9 +93,9 @@ struct FileAssocEntry {
 
 struct LastFile {
     fs::FsPath name;
-    u64 index;
-    u64 offset;
-    u64 entries_count;
+    s64 index;
+    float offset;
+    s64 entries_count;
 };
 
 struct FsDirCollection {
@@ -119,7 +120,7 @@ struct Menu final : MenuBase {
     }
 
 private:
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
     void InstallForwarder();
     auto Scan(const fs::FsPath& new_path, bool is_walk_up = false) -> Result;
 
@@ -131,7 +132,7 @@ private:
         return GetNewPath(m_path, entry.name);
     }
 
-    auto GetNewPath(u64 index) const -> fs::FsPath {
+    auto GetNewPath(s64 index) const -> fs::FsPath {
         return GetNewPath(m_path, GetEntry(index).name);
     }
 
@@ -239,6 +240,7 @@ private:
     std::vector<u32> m_entries_index_search; // files found via search
     std::span<u32> m_entries_current;
 
+    std::unique_ptr<List> m_list;
     std::optional<fs::FsPath> m_daybreak_path;
 
     // search options
@@ -255,9 +257,8 @@ private:
     // if it does, the index becomes that file.
     std::vector<LastFile> m_previous_highlighted_file;
     fs::FsPath m_selected_path;
-    std::size_t m_index{};
-    std::size_t m_index_offset{};
-    std::size_t m_selected_count{};
+    s64 m_index{};
+    s64 m_selected_count{};
     SelectedType m_selected_type{SelectedType::None};
 
     option::OptionLong m_sort{INI_SECTION, "sort", SortType::SortType_Alphabetical};

sphaira/include/ui/menus/ghdl.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ui/menus/menu_base.hpp"
+#include "ui/list.hpp"
 #include "fs.hpp"
 #include "option.hpp"
 #include <vector>
@@ -49,7 +50,7 @@ struct Menu final : MenuBase {
     void OnFocusGained() override;
 
 private:
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
     void Scan();
     void LoadEntriesFromPath(const fs::FsPath& path);
 
@@ -66,8 +67,9 @@ private:
 
 private:
     std::vector<Entry> m_entries;
-    std::size_t m_index{};
-    std::size_t m_index_offset{};
+    s64 m_index{};
+    s64 m_index_offset{};
+    std::unique_ptr<List> m_list;
 };
 
 } // namespace sphaira::ui::menu::gh

sphaira/include/ui/menus/homebrew.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ui/menus/menu_base.hpp"
+#include "ui/list.hpp"
 #include "nro.hpp"
 #include "fs.hpp"
 #include "option.hpp"
@@ -29,7 +30,7 @@ struct Menu final : MenuBase {
     void Draw(NVGcontext* vg, Theme* theme) override;
     void OnFocusGained() override;
 
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
     void InstallHomebrew();
     void ScanHomebrew();
     void Sort();
@@ -50,8 +51,8 @@ private:
     static constexpr inline const char* INI_SECTION = "homebrew";
 
     std::vector<NroEntry> m_entries;
-    std::size_t m_start{};
-    std::size_t m_index{}; // where i am in the array
+    s64 m_index{}; // where i am in the array
+    std::unique_ptr<List> m_list;
 
     option::OptionLong m_sort{INI_SECTION, "sort", SortType::SortType_AlphabeticalStar};
     option::OptionLong m_order{INI_SECTION, "order", OrderType::OrderType_Decending};

sphaira/include/ui/menus/irs_menu.hpp

@@ -61,7 +61,7 @@ private:
     Rotation m_rotation{Rotation_90};
     Colour m_colour{Colour_Grey};
     int m_image{};
-    std::size_t m_index{};
+    s64 m_index{};
 };
 
 } // namespace sphaira::ui::menu::irs

sphaira/include/ui/menus/main_menu.hpp

@@ -34,8 +34,7 @@ struct MainMenu final : Widget {
 
 private:
     void OnLRPress(std::shared_ptr<MenuBase> menu, Button b);
-    void AddOnLPress();
-    void AddOnRPress();
+    void AddOnLRPress();
 
 private:
     std::shared_ptr<homebrew::Menu> m_homebrew_menu{};

sphaira/include/ui/menus/menu_base.hpp

@@ -21,9 +21,6 @@ struct MenuBase : Widget {
     void SetTitleSubHeading(std::string sub_heading);
     void SetSubHeading(std::string sub_heading);
 
-    static auto ScrollHelperDown(u64& index, u64& start, u64 step, s64 row, s64 page, u64 size) -> bool;
-    static auto ScrollHelperUp(u64& index, u64& start, s64 step, s64 row, s64 page, s64 size) -> bool;
-
 private:
     void UpdateVars();
 

sphaira/include/ui/menus/themezer.hpp

@@ -2,6 +2,7 @@
 
 #include "ui/menus/menu_base.hpp"
 #include "ui/scrollable_text.hpp"
+#include "ui/list.hpp"
 #include "option.hpp"
 #include <span>
 
@@ -164,8 +165,11 @@ struct Menu final : MenuBase {
     void Draw(NVGcontext* vg, Theme* theme) override;
     void OnFocusGained() override;
 
-    void SetIndex(std::size_t index) {
+    void SetIndex(s64 index) {
         m_index = index;
+        if (!m_index) {
+            m_list->SetYoff(0);
+        }
     }
 
     // void SetSearch(const std::string& term);
@@ -180,13 +184,13 @@ private:
     static constexpr inline u32 MAX_ON_PAGE = 16; // same as website
 
     std::vector<PageEntry> m_pages;
-    std::size_t m_page_index{};
-    std::size_t m_page_index_max{1};
+    s64 m_page_index{};
+    s64 m_page_index_max{1};
 
     std::string m_search{};
 
-    std::size_t m_start{};
-    std::size_t m_index{}; // where i am in the array
+    s64 m_index{}; // where i am in the array
+    std::unique_ptr<List> m_list;
 
     // options
     option::OptionLong m_sort{INI_SECTION, "sort", 0};

sphaira/include/ui/notification.hpp

@@ -19,7 +19,6 @@ public:
     auto IsDone() const noexcept { return m_count == 0; }
 
 private:
-    void OnLayoutChange() override;
     void Draw(NVGcontext* vg, Theme* theme) override;
 
 private:
@@ -34,7 +33,6 @@ public:
     NotifMananger() = default;
     ~NotifMananger() = default;
 
-    void OnLayoutChange() override;
     void Draw(NVGcontext* vg, Theme* theme) override;
 
     void Push(const NotifEntry& entry);

sphaira/include/ui/nvg_util.hpp

@@ -1,7 +1,7 @@
 #pragma once
 
 #include "nanovg.h"
-#include "ui/widget.hpp"
+#include "ui/types.hpp"
 
 namespace sphaira::ui::gfx {
 
@@ -81,10 +81,11 @@ void textBounds(NVGcontext*, float x, float y, float *bounds, const char* str, .
 // void textBounds(NVGcontext*, float *bounds, const char* str);
 
 auto getButton(Button button) -> const char*;
-void drawButton(NVGcontext* vg, float x, float y, float size, Button button);
-void drawButtons(NVGcontext* vg, const Widget::Actions& actions, const NVGcolor& c, float start_x = 1220.f);
+void drawScrollbar(NVGcontext* vg, Theme* theme, u32 index_off, u32 count, u32 max_per_page);
+void drawScrollbar(NVGcontext* vg, Theme* theme, float x, float y, float h, u32 index_off, u32 count, u32 max_per_page);
 
-void drawDimBackground(NVGcontext* vg);
+void drawScrollbar2(NVGcontext* vg, Theme* theme, float x, float y, float h, s64 index_off, s64 count, s64 row, s64 page);
+void drawScrollbar2(NVGcontext* vg, Theme* theme, s64 index_off, s64 count, s64 row, s64 page);
 
 void updateHighlightAnimation();
 void getHighlightAnimation(float* gradientX, float* gradientY, float* color);

sphaira/include/ui/object.hpp

@@ -9,8 +9,6 @@ public:
     Object() = default;
     virtual ~Object() = default;
 
-    // virtual auto OnLayoutChange() -> void = 0;
-    virtual auto OnLayoutChange() -> void {};
     virtual auto Draw(NVGcontext* vg, Theme* theme) -> void = 0;
 
     auto GetPos() const noexcept {

sphaira/include/ui/option_box.hpp

@@ -12,7 +12,6 @@ public:
     OptionBoxEntry(const std::string& text, Vec4 pos);
 
     auto Update(Controller* controller, TouchInfo* touch) -> void override {}
-    auto OnLayoutChange() -> void override {}
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
 
     auto Selected(bool enable) -> void;
@@ -28,25 +27,25 @@ private:
 // todo: support upto 4 options.
 class OptionBox final : public Widget {
 public:
-    using Callback = std::function<void(std::optional<std::size_t> index)>;
+    using Callback = std::function<void(std::optional<s64> index)>;
     using Option = std::string;
     using Options = std::vector<Option>;
 
 public:
     OptionBox(const std::string& message, const Option& a, Callback cb = [](auto){}); // confirm
     OptionBox(const std::string& message, const Option& a, const Option& b, Callback cb); // yesno
-    OptionBox(const std::string& message, const Option& a, const Option& b, std::size_t index, Callback cb); // yesno
+    OptionBox(const std::string& message, const Option& a, const Option& b, s64 index, Callback cb); // yesno
     OptionBox(const std::string& message, const Option& a, const Option& b, const Option& c, Callback cb); // tri
-    OptionBox(const std::string& message, const Option& a, const Option& b, const Option& c, std::size_t index, Callback cb); // tri
+    OptionBox(const std::string& message, const Option& a, const Option& b, const Option& c, s64 index, Callback cb); // tri
 
     auto Update(Controller* controller, TouchInfo* touch) -> void override;
-    auto OnLayoutChange() -> void override;
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
     auto OnFocusGained() noexcept -> void override;
     auto OnFocusLost() noexcept -> void override;
 
 private:
-    auto Setup(std::size_t index) -> void; // common setup values
+    auto Setup(s64 index) -> void; // common setup values
+    void SetIndex(s64 index);
 
 private:
     std::string m_message;
@@ -54,7 +53,7 @@ private:
 
     Vec4 m_spacer_line{};
 
-    std::size_t m_index{};
+    s64 m_index{};
     std::vector<OptionBoxEntry> m_entries;
 };
 

sphaira/include/ui/option_list.hpp

@@ -1,27 +0,0 @@
-#pragma once
-
-#include "ui/widget.hpp"
-#include <optional>
-
-namespace sphaira::ui {
-
-class OptionList final : public Widget {
-public:
-    using Options = std::vector<std::pair<std::string, std::function<void()>>>;
-
-public:
-    OptionList(Options _options);
-
-    auto Update(Controller* controller, TouchInfo* touch) -> void override;
-    auto OnLayoutChange() -> void override;
-    auto Draw(NVGcontext* vg, Theme* theme) -> void override;
-
-protected:
-    Options m_options;
-    std::size_t m_index{};
-
-private:
-
-};
-
-} // namespace sphaira::ui

sphaira/include/ui/popup_list.hpp

@@ -1,7 +1,7 @@
 #pragma once
 
 #include "ui/widget.hpp"
-#include "ui/scrollbar.hpp"
+#include "ui/list.hpp"
 #include <optional>
 
 namespace sphaira::ui {
@@ -9,21 +9,23 @@ namespace sphaira::ui {
 class PopupList final : public Widget {
 public:
     using Items = std::vector<std::string>;
-    using Callback = std::function<void(std::optional<std::size_t>)>;
+    using Callback = std::function<void(std::optional<s64>)>;
 
 public:
-    explicit PopupList(std::string title, Items items, Callback cb, std::size_t index = 0);
+    explicit PopupList(std::string title, Items items, Callback cb, s64 index = 0);
     PopupList(std::string title, Items items, Callback cb, std::string index);
-    PopupList(std::string title, Items items, std::string& index_str_ref, std::size_t& index);
+    PopupList(std::string title, Items items, std::string& index_str_ref, s64& index);
     PopupList(std::string title, Items items, std::string& index_ref);
-    PopupList(std::string title, Items items, std::size_t& index_ref);
+    PopupList(std::string title, Items items, s64& index_ref);
 
     auto Update(Controller* controller, TouchInfo* touch) -> void override;
-    auto OnLayoutChange() -> void override;
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
     auto OnFocusGained() noexcept -> void override;
     auto OnFocusLost() noexcept -> void override;
 
+private:
+    void SetIndex(s64 index);
+
 private:
     static constexpr Vec2 m_title_pos{70.f, 28.f};
     static constexpr Vec4 m_block{280.f, 110.f, 720.f, 60.f};
@@ -33,17 +35,14 @@ private:
     std::string m_title;
     Items m_items;
     Callback m_callback;
-    std::size_t m_index; // index in list array
-    std::size_t m_index_offset{}; // drawing from array start
+    s64 m_index; // index in list array
+    s64 m_index_offset{}; // drawing from array start
 
-    // std::size_t& index_ref;
-    // std::string& index_str_ref;
+    std::unique_ptr<List> m_list;
 
-    float m_selected_y{};
     float m_yoff{};
     float m_line_top{};
     float m_line_bottom{};
-    ScrollBar m_scrollbar;
 };
 
 } // namespace sphaira::ui

sphaira/include/ui/progress_box.hpp

@@ -22,7 +22,7 @@ struct ProgressBox final : Widget {
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
 
     auto NewTransfer(const std::string& transfer) -> ProgressBox&;
-    auto UpdateTransfer(u64 offset, u64 size) -> ProgressBox&;
+    auto UpdateTransfer(s64 offset, s64 size) -> ProgressBox&;
     void RequestExit();
     auto ShouldExit() -> bool;
 
@@ -55,8 +55,8 @@ private:
     ProgressBoxDoneCallback m_done{};
     std::string m_title{};
     std::string m_transfer{};
-    u64 m_size{};
-    u64 m_offset{};
+    s64 m_size{};
+    s64 m_offset{};
     bool m_exit_requested{};
 };
 

sphaira/include/ui/scrollbar.hpp

@@ -1,34 +0,0 @@
-#pragma once
-
-#include "ui/widget.hpp"
-
-namespace sphaira::ui {
-
-class ScrollBar final : public Widget {
-public:
-    enum class Direction { DOWN, UP };
-
-public:
-    ScrollBar() = default;
-    ScrollBar(Vec4 bounds, float entry_height, std::size_t entries);
-
-    auto Update(Controller* controller, TouchInfo* touch) -> void override {}
-    auto OnLayoutChange() -> void override;
-    auto Draw(NVGcontext* vg, Theme* theme) -> void override;
-
-    auto Setup(Vec4 bounds, float entry_height, std::size_t entries) -> void;
-    auto Move(Direction direction) -> void;
-
-private:
-    auto Setup() -> void;
-
-private:
-    Vec4 m_bounds{};
-    std::size_t m_entries{};
-    std::size_t m_index{};
-    float m_entry_height{};
-    float m_step_size{};
-    bool m_should_draw{false};
-};
-
-} // namespace sphaira::ui

sphaira/include/ui/sidebar.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ui/widget.hpp"
+#include "ui/list.hpp"
 #include <memory>
 
 namespace sphaira::ui {
@@ -9,7 +10,6 @@ class SidebarEntryBase : public Widget {
 public:
     SidebarEntryBase(std::string&& title);
     virtual auto Draw(NVGcontext* vg, Theme* theme) -> void override;
-    virtual auto OnLayoutChange() -> void override {}
 
 protected:
     std::string m_title;
@@ -24,9 +24,9 @@ public:
     SidebarEntryBool(std::string title, bool option, Callback cb, std::string true_str = "On", std::string false_str = "Off");
     SidebarEntryBool(std::string title, bool& option, std::string true_str = "On", std::string false_str = "Off");
 
+private:
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
 
-private:
     bool m_option;
     Callback m_callback;
     std::string m_true_str;
@@ -50,10 +50,10 @@ class SidebarEntryArray final : public SidebarEntryBase {
 public:
     using Items = std::vector<std::string>;
     using ListCallback = std::function<void()>;
-    using Callback = std::function<void(std::size_t& index)>;
+    using Callback = std::function<void(s64& index)>;
 
 public:
-    explicit SidebarEntryArray(std::string title, Items items, Callback cb, std::size_t index = 0);
+    explicit SidebarEntryArray(std::string title, Items items, Callback cb, s64 index = 0);
     SidebarEntryArray(std::string title, Items items, Callback cb, std::string index);
     SidebarEntryArray(std::string title, Items items, std::string& index);
 
@@ -63,7 +63,7 @@ private:
     Items m_items;
     ListCallback m_list_callback;
     Callback m_callback;
-    std::size_t m_index;
+    s64 m_index;
 };
 
 template <typename T>
@@ -101,33 +101,31 @@ public:
     Sidebar(std::string title, std::string sub, Side side);
 
     auto Update(Controller* controller, TouchInfo* touch) -> void override;
-    auto OnLayoutChange() -> void override {}
     auto Draw(NVGcontext* vg, Theme* theme) -> void override;
     auto OnFocusGained() noexcept -> void override;
     auto OnFocusLost() noexcept -> void override;
 
     void Add(std::shared_ptr<SidebarEntryBase> entry);
-    void AddSpacer();
-    void AddHeader(std::string name);
 
 private:
-    void SetIndex(std::size_t index);
+    void SetIndex(s64 index);
+    void SetupButtons();
 
 private:
     std::string m_title;
     std::string m_sub;
     Side m_side;
     Items m_items;
-    std::size_t m_index{};
-    std::size_t m_index_offset{};
+    s64 m_index{};
+    s64 m_index_offset{};
+
+    std::unique_ptr<List> m_list;
 
     Vec4 m_top_bar{};
     Vec4 m_bottom_bar{};
     Vec2 m_title_pos{};
     Vec4 m_base_pos{};
 
-    float m_selected_y{};
-
     static constexpr float m_title_size{28.f};
     // static constexpr Vec2 box_size{380.f, 70.f};
     static constexpr Vec2 m_box_size{400.f, 70.f};

sphaira/include/ui/types.hpp

@@ -196,39 +196,31 @@ struct Theme {
     fs::FsPath path;
     PLSR_BFSTM music;
     ElementEntry elements[ThemeEntryID_MAX];
-
-    // NVGcolor background; // bg
-    // NVGcolor lines; // grid lines
-    // NVGcolor spacer; // lines in popup box
-    // NVGcolor text; // text colour
-    // NVGcolor text_info; // description text
-    NVGcolor selected; // selected colours
-    // NVGcolor overlay; // popup overlay colour
-
-    // void DrawElement(float x, float y, float w, float h, ThemeEntryID id);
 };
 
-enum class TouchState {
-    Start, // set when touch has started
-    Touching, // set when touch is held longer than 1 frame
-    Stop, // set after touch is released
-    None, // set when there is no touch
-};
+// enum class TouchGesture {
+//     None,
+//     Tap,
+//     Scroll,
+// };
 
 struct TouchInfo {
-    s32 initial_x;
-    s32 initial_y;
+    HidTouchState initial;
+    HidTouchState cur;
 
-    s32 cur_x;
-    s32 cur_y;
+    auto in_range(const Vec4& v) const -> bool {
+        return cur.x >= v.x && cur.x <= v.x + v.w && cur.y >= v.y && cur.y <= v.y + v.h;
+    }
 
-    s32 prev_x;
-    s32 prev_y;
-
-    u32 finger_id;
+    auto in_range(s32 x, s32 y, s32 w, s32 h) const -> bool {
+        return in_range(Vec4(x, y, w, h));
+    }
 
     bool is_touching;
     bool is_tap;
+    bool is_scroll;
+    bool is_clicked;
+    bool is_end;
 };
 
 enum class Button : u64 {

sphaira/include/ui/widget.hpp

@@ -8,7 +8,20 @@
 
 namespace sphaira::ui {
 
+struct uiButton final : Object {
+    uiButton(Button button, Action action) : m_button{button}, m_action{action} {}
+    auto Draw(NVGcontext* vg, Theme* theme) -> void override;
+
+    Button m_button;
+    Action m_action;
+    Vec4 m_button_pos{};
+    Vec4 m_hint_pos{};
+};
+
 struct Widget : public Object {
+    using Actions = std::map<Button, Action>;
+    using uiButtons = std::vector<uiButton>;
+
     virtual ~Widget() = default;
 
     virtual void Update(Controller* controller, TouchInfo* touch);
@@ -49,6 +62,8 @@ struct Widget : public Object {
         m_actions.clear();
     }
 
+    auto FireAction(Button button, u8 type = ActionType::DOWN) -> bool;
+
     void SetPop(bool pop = true) {
         m_pop = pop;
     }
@@ -57,9 +72,14 @@ struct Widget : public Object {
         return m_pop;
     }
 
-    using Actions = std::map<Button, Action>;
-    // using Actions = std::unordered_map<Button, Action>;
+    auto SetUiButtonPos(Vec2 pos) {
+        m_button_pos = pos;
+    }
+
+    auto GetUiButtons() const -> uiButtons;
+
     Actions m_actions;
+    Vec2 m_button_pos{1220, 675};
     bool m_focus{false};
     bool m_pop{false};
 };

sphaira/source/app.cpp

@@ -391,12 +391,12 @@ auto App::GetThemeMetaList() -> std::span<ThemeMeta> {
     return g_app->m_theme_meta_entries;
 }
 
-void App::SetTheme(u64 theme_index) {
+void App::SetTheme(s64 theme_index) {
     g_app->LoadTheme(g_app->m_theme_meta_entries[theme_index].ini_path.c_str());
     g_app->m_theme_index = theme_index;
 }
 
-auto App::GetThemeIndex() -> u64 {
+auto App::GetThemeIndex() -> s64 {
     return g_app->m_theme_index;
 }
 
@@ -701,41 +701,40 @@ void App::ExitRestart() {
 void App::Poll() {
     m_controller.Reset();
 
+    HidTouchScreenState state{};
+    hidGetTouchScreenStates(&state, 1);
+    m_touch_info.is_clicked = false;
+
+    if (state.count == 1 && !m_touch_info.is_touching) {
+        m_touch_info.initial = m_touch_info.cur = state.touches[0];
+        m_touch_info.is_touching = true;
+        m_touch_info.is_tap = true;
+    } else if (state.count >= 1 && m_touch_info.is_touching) {
+        m_touch_info.cur = state.touches[0];
+
+        if (m_touch_info.is_tap &&
+            (std::abs((s32)m_touch_info.initial.x - (s32)m_touch_info.cur.x) > 20 ||
+            std::abs((s32)m_touch_info.initial.y - (s32)m_touch_info.cur.y) > 20)) {
+            m_touch_info.is_tap = false;
+            m_touch_info.is_scroll = true;
+        }
+    } else if (m_touch_info.is_touching) {
+        m_touch_info.is_touching = false;
+        m_touch_info.is_scroll = false;
+        if (m_touch_info.is_tap) {
+            m_touch_info.is_clicked = true;
+        } else {
+            m_touch_info.is_end = true;
+        }
+    }
+
+    // todo: better implement this to match hos
+    if (!m_touch_info.is_touching && !m_touch_info.is_clicked) {
         padUpdate(&m_pad);
         m_controller.m_kdown = padGetButtonsDown(&m_pad);
         m_controller.m_kheld = padGetButtons(&m_pad);
         m_controller.m_kup = padGetButtonsUp(&m_pad);
         m_controller.UpdateButtonHeld(static_cast<u64>(Button::ANY_DIRECTION));
-
-    HidTouchScreenState touch_state{};
-    hidGetTouchScreenStates(&touch_state, 1);
-
-    if (touch_state.count == 1 && !m_touch_info.is_touching) {
-        m_touch_info.initial_x = m_touch_info.prev_x = m_touch_info.cur_x = touch_state.touches[0].x;
-        m_touch_info.initial_y = m_touch_info.prev_y = m_touch_info.cur_y = touch_state.touches[0].y;
-        m_touch_info.finger_id = touch_state.touches[0].finger_id;
-        m_touch_info.is_touching = true;
-        m_touch_info.is_tap = true;
-        // PlaySoundEffect(SoundEffect_Limit);
-    } else if (touch_state.count >= 1 && m_touch_info.is_touching && m_touch_info.finger_id == touch_state.touches[0].finger_id) {
-        m_touch_info.prev_x = m_touch_info.cur_x;
-        m_touch_info.prev_y = m_touch_info.cur_y;
-
-        m_touch_info.cur_x = touch_state.touches[0].x;
-        m_touch_info.cur_y = touch_state.touches[0].y;
-
-        if (m_touch_info.is_tap &&
-            (std::abs(m_touch_info.initial_x - m_touch_info.cur_x) > 20 ||
-            std::abs(m_touch_info.initial_y - m_touch_info.cur_y) > 20)) {
-            m_touch_info.is_tap = false;
-        }
-    } else if (m_touch_info.is_touching) {
-        m_touch_info.is_touching = false;
-
-        // check if we clicked on anything, if so, handle it
-        if (m_touch_info.is_tap) {
-            // todo:
-        }
     }
 }
 
@@ -809,17 +808,21 @@ auto App::GetVg() -> NVGcontext* {
 }
 
 void DrawElement(float x, float y, float w, float h, ThemeEntryID id) {
+    DrawElement({x, y, w, h}, id);
+}
+
+void DrawElement(const Vec4& v, ThemeEntryID id) {
     const auto& e = g_app->m_theme.elements[id];
 
     switch (e.type) {
         case ElementType::None: {
         } break;
         case ElementType::Texture: {
-            const auto paint = nvgImagePattern(g_app->vg, x, y, w, h, 0, e.texture, 1.f);
-            ui::gfx::drawRect(g_app->vg, x, y, w, h, paint);
+            const auto paint = nvgImagePattern(g_app->vg, v.x, v.y, v.w, v.h, 0, e.texture, 1.f);
+            ui::gfx::drawRect(g_app->vg, v, paint);
         } break;
         case ElementType::Colour: {
-            ui::gfx::drawRect(g_app->vg, x, y, w, h, e.colour);
+            ui::gfx::drawRect(g_app->vg, v, e.colour);
         } break;
     }
 }

sphaira/source/download.cpp

@@ -38,7 +38,7 @@ Mutex g_mutex_share[CURL_LOCK_DATA_LAST]{};
 
 struct DataStruct {
     std::vector<u8> data;
-    u64 offset{};
+    s64 offset{};
     FsFile f{};
     s64 file_offset{};
 };

sphaira/source/ui/error_box.cpp

@@ -1134,10 +1134,6 @@ auto ErrorBox::Update(Controller* controller, TouchInfo* touch) -> void {
     Widget::Update(controller, touch);
 }
 
-auto ErrorBox::OnLayoutChange() -> void {
-
-}
-
 auto ErrorBox::Draw(NVGcontext* vg, Theme* theme) -> void {
     gfx::dimBackground(vg);
     gfx::drawRect(vg, m_pos, theme->elements[ThemeEntryID_SELECTED].colour);

sphaira/source/ui/list.cpp

@@ -0,0 +1,189 @@
+#include "ui/list.hpp"
+#include "ui/nvg_util.hpp"
+#include "app.hpp"
+#include "log.hpp"
+
+namespace sphaira::ui {
+
+List::List(s64 row, s64 page, const Vec4& pos, const Vec4& v, const Vec2& pad)
+: m_row{row}
+, m_page{page}
+, m_v{v}
+, m_pad{pad} {
+    m_pos = pos;
+    SetScrollBarPos(SCREEN_WIDTH - 50, 100, SCREEN_HEIGHT-200);
+}
+
+auto List::ClampY(float y, s64 count) const -> float {
+    float y_max = 0;
+
+    if (count >= m_page) {
+        // round up
+        if (count % m_row) {
+            count = count + (m_row - count % m_row);
+        }
+        y_max = (count - m_page) / m_row * GetMaxY();
+    }
+
+    if (y < 0) {
+        y = 0;
+    } else if (y > y_max) {
+        y = y_max;
+    }
+
+    return y;
+}
+
+void List::OnUpdate(Controller* controller, TouchInfo* touch, s64 count, TouchCallback callback) {
+    if (touch->is_clicked && touch->in_range(GetPos())) {
+        auto v = m_v;
+        v.y -= ClampY(m_yoff + m_y_prog, count);
+
+        for (s64 i = 0; i < count; v.y += v.h + m_pad.y) {
+            if (v.y > GetY() + GetH()) {
+                break;
+            }
+
+            const auto x = v.x;
+
+            for (; i < count; i++, v.x += v.w + m_pad.x) {
+                // only draw if full x is in bounds
+                if (v.x + v.w > GetX() + GetW()) {
+                    break;
+                }
+
+                // skip anything not visible
+                if (v.y + v.h < GetY()) {
+                    continue;
+                }
+
+                Vec4 vv = v;
+                // if not drawing, only return clipped v as its used for touch
+                vv.w = std::min(v.x + v.w, m_pos.x + m_pos.w) - v.x;
+                vv.h = std::min(v.y + v.h, m_pos.y + m_pos.h) - v.y;
+
+                if (touch->in_range(vv)) {
+                    callback(i);
+                    return;
+                }
+            }
+
+            v.x = x;
+        }
+    } else if (touch->is_scroll && touch->in_range(GetPos())) {
+        m_y_prog = (float)touch->initial.y - (float)touch->cur.y;
+    } else if (touch->is_end) {
+        m_yoff = ClampY(m_yoff + m_y_prog, count);
+        m_y_prog = 0;
+    }
+}
+
+void List::Draw(NVGcontext* vg, Theme* theme, s64 count, Callback callback) const {
+    const auto yoff = ClampY(m_yoff + m_y_prog, count);
+    const s64 start = yoff / GetMaxY() * m_row;
+    gfx::drawScrollbar2(vg, theme, m_scrollbar.x, m_scrollbar.y, m_scrollbar.h, start, count, m_row, m_page);
+
+    auto v = m_v;
+    v.y -= yoff;
+
+    nvgSave(vg);
+    nvgScissor(vg, GetX(), GetY(), GetW(), GetH());
+
+    for (s64 i = 0; i < count; v.y += v.h + m_pad.y) {
+        if (v.y > GetY() + GetH()) {
+            break;
+        }
+
+        const auto x = v.x;
+
+        for (; i < count; i++, v.x += v.w + m_pad.x) {
+            // only draw if full x is in bounds
+            if (v.x + v.w > GetX() + GetW()) {
+                break;
+            }
+
+            // skip anything not visible
+            if (v.y + v.h < GetY()) {
+                continue;
+            }
+
+            callback(vg, theme, v, i);
+        }
+
+        v.x = x;
+    }
+
+    nvgRestore(vg);
+}
+
+auto List::ScrollDown(s64& index, s64 step, s64 count) -> bool {
+    const auto old_index = index;
+
+    if (!count) {
+        return false;
+    }
+
+    if (index + step < count) {
+        index += step;
+    } else {
+        index = count - 1;
+    }
+
+    if (index != old_index) {
+        App::PlaySoundEffect(SoundEffect_Scroll);
+        s64 delta = index - old_index;
+        s64 start = m_yoff / GetMaxY() * m_row;
+
+        while (index < start) {
+            start -= m_row;
+            m_yoff -= GetMaxY();
+        }
+
+        if (index - start >= m_page) {
+            do {
+                start += m_row;
+                delta -= m_row;
+                m_yoff += GetMaxY();
+            } while (delta > 0 && start + m_page < count);
+        }
+
+        return true;
+    }
+
+    return false;
+}
+
+auto List::ScrollUp(s64& index, s64 step, s64 count) -> bool {
+    const auto old_index = index;
+
+    if (!count) {
+        return false;
+    }
+
+    if (index >= step) {
+        index -= step;
+    } else {
+        index = 0;
+    }
+
+    if (index != old_index) {
+        App::PlaySoundEffect(SoundEffect_Scroll);
+        s64 start = m_yoff / GetMaxY() * m_row;
+
+        while (index < start) {
+            start -= m_row;
+            m_yoff -= GetMaxY();
+        }
+
+        while (index - start >= m_page && start + m_page < count) {
+            start += m_row;
+            m_yoff += GetMaxY();
+        }
+
+        return true;
+    }
+
+    return false;
+}
+
+} // namespace sphaira::ui

sphaira/source/ui/menus/appstore.cpp

@@ -271,19 +271,11 @@ void DrawIcon(NVGcontext* vg, const LazyImage& l, const LazyImage& d, float x, f
         rounded_image = false;
         gfx::drawRect(vg, x, y, w, h, nvgRGB(i.first_pixel[0], i.first_pixel[1], i.first_pixel[2]), rounded);
     }
-    if (iw > w || ih > h) {
-        crop = true;
-        nvgSave(vg);
-        nvgScissor(vg, x, y, w, h);
-    }
     if (rounded_image) {
         gfx::drawImageRounded(vg, ix, iy, iw, ih, i.image);
     } else {
         gfx::drawImage(vg, ix, iy, iw, ih, i.image);
     }
-    if (crop) {
-        nvgRestore(vg);
-    }
 }
 
 void DrawIcon(NVGcontext* vg, const LazyImage& l, const LazyImage& d, Vec4 vec, bool rounded = true, float scale = 1.0) {
@@ -711,6 +703,11 @@ EntryMenu::EntryMenu(Entry& entry, const LazyImage& default_icon, Menu& menu)
     SetSubHeading(m_entry.binary);
     SetSubHeading(m_entry.description);
     UpdateOptions();
+
+    // todo: see Draw()
+    // const Vec4 v{75, 110, 370, 155};
+    // const Vec2 pad{10, 10};
+    // m_list = std::make_unique<List>(3, 3, v, pad);
 }
 
 EntryMenu::~EntryMenu() {
@@ -755,6 +752,7 @@ void EntryMenu::Draw(NVGcontext* vg, Theme* theme) {
     // for (const auto& option : m_options) {
     const auto& text_col = theme->elements[ThemeEntryID_TEXT].colour;
 
+    // todo: rewrite this mess and use list
     constexpr float mm = 0;//20;
     constexpr Vec4 block{968.f + mm, 110.f, 256.f - mm*2, 60.f};
     constexpr float text_xoffset{15.f};
@@ -858,7 +856,7 @@ void EntryMenu::UpdateOptions() {
     SetIndex(0);
 }
 
-void EntryMenu::SetIndex(std::size_t index) {
+void EntryMenu::SetIndex(s64 index) {
     m_index = index;
     const auto option = m_options[m_index];
     if (option.confirm_text.empty()) {
@@ -886,8 +884,6 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"AppStore"_i18n}
     fs.CreateDirectoryRecursively("/switch/sphaira/cache/appstore/banners");
     fs.CreateDirectoryRecursively("/switch/sphaira/cache/appstore/screens");
 
-    // m_span = m_entries;
-
     this->SetActions(
         std::make_pair(Button::RIGHT, Action{[this](){
             if (m_entries_current.empty()) {
@@ -912,22 +908,22 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"AppStore"_i18n}
             }
         }}),
         std::make_pair(Button::DOWN, Action{[this](){
-            if (ScrollHelperDown(m_index, m_start, 3, 3, 9, m_entries_current.size())) {
+            if (m_list->ScrollDown(m_index, 3, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::UP, Action{[this](){
-            if (ScrollHelperUp(m_index, m_start, 3, 3, 9, m_entries_current.size())) {
+            if (m_list->ScrollUp(m_index, 3, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::R2, Action{[this](){
-            if (ScrollHelperDown(m_index, m_start, 9, 3, 9, m_entries_current.size())) {
+            if (m_list->ScrollDown(m_index, 9, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::L2, Action{[this](){
-            if (ScrollHelperUp(m_index, m_start, 9, 3, 9, m_entries_current.size())) {
+            if (m_list->ScrollUp(m_index, 9, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
@@ -962,17 +958,17 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"AppStore"_i18n}
             order_items.push_back("Decending"_i18n);
             order_items.push_back("Ascending"_i18n);
 
-            options->Add(std::make_shared<SidebarEntryArray>("Filter"_i18n, filter_items, [this, filter_items](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Filter"_i18n, filter_items, [this, filter_items](s64& index_out){
                 SetFilter((Filter)index_out);
-            }, (std::size_t)m_filter));
+            }, (s64)m_filter));
 
-            options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](s64& index_out){
                 SetSort((SortType)index_out);
-            }, (std::size_t)m_sort));
+            }, (s64)m_sort));
 
-            options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](s64& index_out){
                 SetOrder((OrderType)index_out);
-            }, (std::size_t)m_order));
+            }, (s64)m_order));
 
             options->Add(std::make_shared<SidebarEntryCallback>("Search"_i18n, [this](){
                 std::string out;
@@ -1005,6 +1001,9 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"AppStore"_i18n}
     m_sort = (SortType)ini_getl(INI_SECTION, "sort", m_sort, App::CONFIG_PATH);
     m_order = (OrderType)ini_getl(INI_SECTION, "order", m_order, App::CONFIG_PATH);
 
+    const Vec4 v{75, 110, 370, 155};
+    const Vec2 pad{10, 10};
+    m_list = std::make_unique<List>(3, 9, m_pos, v, pad);
     Sort();
 }
 
@@ -1014,6 +1013,14 @@ Menu::~Menu() {
 
 void Menu::Update(Controller* controller, TouchInfo* touch) {
     MenuBase::Update(controller, touch);
+    m_list->OnUpdate(controller, touch, m_entries_current.size(), [this](auto i) {
+        if (m_index == i) {
+            FireAction(Button::A);
+        } else {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            SetIndex(i);
+        }
+    });
 }
 
 void Menu::Draw(NVGcontext* vg, Theme* theme) {
@@ -1029,26 +1036,12 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         return;
     }
 
-    const u64 SCROLL = m_start;
-    const u64 max_entry_display = 9;
-    const u64 nro_total = m_entries_current.size();
-    const u64 cursor_pos = m_index;
-
-    // only draw scrollbar if needed
-    if (nro_total > max_entry_display) {
-        const auto scrollbar_size = 500.f;
-        const auto sb_h = 3.f / (float)nro_total * scrollbar_size;
-        const auto sb_y = SCROLL / 3.f;
-        gfx::drawRect(vg, SCREEN_WIDTH - 50, 100, 10, scrollbar_size, theme->elements[ThemeEntryID_GRID].colour);
-        gfx::drawRect(vg, SCREEN_WIDTH - 50+2, 102 + sb_h * sb_y, 10-4, sb_h + (sb_h * 2) - 4, theme->elements[ThemeEntryID_TEXT_SELECTED].colour);
-    }
-
     // max images per frame, in order to not hit io / gpu too hard.
     const int image_load_max = 2;
     int image_load_count = 0;
 
-    for (u64 i = 0, pos = SCROLL, y = 110, w = 370, h = 155; pos < nro_total && i < max_entry_display; y += h + 10) {
-        for (u64 j = 0, x = 75; j < 3 && pos < nro_total && i < max_entry_display; j++, i++, pos++, x += w + 10) {
+    m_list->Draw(vg, theme, m_entries_current.size(), [this, &image_load_count](auto* vg, auto* theme, auto v, auto pos) {
+        const auto& [x, y, w, h] = v;
         const auto index = m_entries_current[pos];
         auto& e = m_entries[index];
         auto& image = e.image;
@@ -1106,7 +1099,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         }
 
         auto text_id = ThemeEntryID_TEXT;
-            if (pos == cursor_pos) {
+        if (pos == m_index) {
             text_id = ThemeEntryID_TEXT_SELECTED;
             gfx::drawRectOutline(vg, 4.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour, x, y, w, h, theme->elements[ThemeEntryID_SELECTED].colour);
         } else {
@@ -1120,7 +1113,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         // gfx::drawImage(vg, x + 20, y + 20, image_size, image_size_h, image.image ? image.image : m_default_image);
 
         nvgSave(vg);
-            nvgScissor(vg, x, y, w - 30.f, h); // clip
+        nvgIntersectScissor(vg, v.x, v.y, w - 30.f, h); // clip
         {
             const float font_size = 18;
             gfx::drawTextArgs(vg, x + 148, y + 45, font_size, NVG_ALIGN_LEFT, theme->elements[text_id].colour, e.title.c_str());
@@ -1144,8 +1137,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
                 gfx::drawImageRounded(vg, x + w - 30.f, y + 110, i_size, i_size, m_update.image);
                 break;
         }
-        }
-    }
+    });
 }
 
 void Menu::OnFocusGained() {
@@ -1174,21 +1166,16 @@ void Menu::OnFocusGained() {
         if (m_dirty) {
             m_dirty = false;
             const auto& current_entry = m_entries[m_entries_current[m_index]];
-            // m_start = 0;
-            // m_index = 0;
-            log_write("\nold index: %zu start: %zu\n", m_index, m_start);
-            // old index: 19 start: 12
             Sort();
 
             for (u32 i = 0; i < m_entries_current.size(); i++) {
                 if (current_entry.name == m_entries[m_entries_current[i]].name) {
                     SetIndex(i);
                     if (i >= 9) {
-                        m_start = (i - 9) / 3 * 3 + 3;
+                        m_list->SetYoff((((i - 9) + 3) / 3) * m_list->GetMaxY());
                     } else {
-                        m_start = 0;
+                        m_list->SetYoff(0);
                     }
-                    log_write("\nnew index: %zu start: %zu\n", m_index, m_start);
                     break;
                 }
             }
@@ -1196,10 +1183,10 @@ void Menu::OnFocusGained() {
     }
 }
 
-void Menu::SetIndex(std::size_t index) {
+void Menu::SetIndex(s64 index) {
     m_index = index;
     if (!m_index) {
-        m_start = 0;
+        m_list->SetYoff(0);
     }
 
     this->SetSubHeading(std::to_string(m_index + 1) + " / " + std::to_string(m_entries_current.size()));
@@ -1394,9 +1381,10 @@ void Menu::SetSearch(const std::string& term) {
         SetFilter(m_filter);
         SetIndex(m_entry_search_jump_back);
         if (m_entry_search_jump_back >= 9) {
-            m_start = (m_entry_search_jump_back - 9) / 3 * 3 + 3;
+            m_list->SetYoff(0);
+            m_list->SetYoff((((m_entry_search_jump_back - 9) + 3) / 3) * m_list->GetMaxY());
         } else {
-            m_start = 0;
+            m_list->SetYoff(0);
         }
     }});
 
@@ -1427,11 +1415,12 @@ void Menu::SetAuthor() {
         } else {
             SetFilter(m_filter);
         }
+
         SetIndex(m_entry_author_jump_back);
         if (m_entry_author_jump_back >= 9) {
-            m_start = (m_entry_author_jump_back - 9) / 3 * 3 + 3;
+            m_list->SetYoff((((m_entry_author_jump_back - 9) + 3) / 3) * m_list->GetMaxY());
         } else {
-            m_start = 0;
+            m_list->SetYoff(0);
         }
     }});
 

sphaira/source/ui/menus/filebrowser.cpp

@@ -246,22 +246,22 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"FileBrowser"_i1
             }
         }}),
         std::make_pair(Button::DOWN, Action{[this](){
-            if (ScrollHelperDown(m_index, m_index_offset, 1, 1, 8, m_entries_current.size())) {
+            if (m_list->ScrollDown(m_index, 1, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::UP, Action{[this](){
-            if (ScrollHelperUp(m_index, m_index_offset, 1, 1, 8, m_entries_current.size())) {
+            if (m_list->ScrollUp(m_index, 1, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::DPAD_RIGHT, Action{[this](){
-            if (ScrollHelperDown(m_index, m_index_offset, 8, 1, 8, m_entries_current.size())) {
+            if (m_list->ScrollDown(m_index, 8, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::DPAD_LEFT, Action{[this](){
-            if (ScrollHelperUp(m_index, m_index_offset, 8, 1, 8, m_entries_current.size())) {
+            if (m_list->ScrollUp(m_index, 8, m_entries_current.size())) {
                 SetIndex(m_index);
             }
         }}),
@@ -355,12 +355,12 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"FileBrowser"_i1
                 order_items.push_back("Decending"_i18n);
                 order_items.push_back("Ascending"_i18n);
 
-                options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this](std::size_t& index_out){
+                options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this](s64& index_out){
                     m_sort.Set(index_out);
                     SortAndFindLastFile();
                 }, m_sort.Get()));
 
-                options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this](std::size_t& index_out){
+                options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this](s64& index_out){
                     m_order.Set(index_out);
                     SortAndFindLastFile();
                 }, m_order.Get()));
@@ -542,7 +542,7 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"FileBrowser"_i1
                 mount_items.push_back("Image System memory"_i18n);
                 mount_items.push_back("Image microSD card"_i18n);
 
-                options->Add(std::make_shared<SidebarEntryArray>("Mount"_i18n, mount_items, [this](std::size_t& index_out){
+                options->Add(std::make_shared<SidebarEntryArray>("Mount"_i18n, mount_items, [this](s64& index_out){
                     App::PopToMenu();
                     m_mount.Set(index_out);
                     SetFs("/", index_out);
@@ -551,6 +551,9 @@ Menu::Menu(const std::vector<NroEntry>& nro_entries) : MenuBase{"FileBrowser"_i1
         }})
     );
 
+    const Vec4 v{75, GetY() + 1.f + 42.f, 1220.f-45.f*2, 60};
+    m_list = std::make_unique<List>(1, 8, m_pos, v);
+
     fs::FsPath buf;
     ini_gets("paths", "last_path", "/", buf, sizeof(buf), App::CONFIG_PATH);
     SetFs(buf, m_mount.Get());
@@ -562,6 +565,14 @@ Menu::~Menu() {
 
 void Menu::Update(Controller* controller, TouchInfo* touch) {
     MenuBase::Update(controller, touch);
+    m_list->OnUpdate(controller, touch, m_entries_current.size(), [this](auto i) {
+        if (m_index == i) {
+            FireAction(Button::A);
+        } else {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            SetIndex(i);
+        }
+    });
 }
 
 void Menu::Draw(NVGcontext* vg, Theme* theme) {
@@ -574,35 +585,10 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         return;
     }
 
-    const u64 SCROLL = m_index_offset;
-    constexpr u64 max_entry_display = 8;
-    const u64 entry_total = m_entries_current.size();
-
-    // only draw scrollbar if needed
-    if (entry_total > max_entry_display) {
-        const auto scrollbar_size = 500.f;
-        const auto sb_h = 1.f / (float)entry_total * scrollbar_size;
-        const auto sb_y = SCROLL;
-        gfx::drawRect(vg, SCREEN_WIDTH - 50, 100, 10, scrollbar_size, gfx::getColour(gfx::Colour::BLACK));
-        gfx::drawRect(vg, SCREEN_WIDTH - 50+2, 102 + sb_h * sb_y, 10-4, sb_h + (sb_h * (max_entry_display - 1)) - 4, gfx::getColour(gfx::Colour::SILVER));
-    }
-
-    // constexpr Vec4 line_top{30.f, 86.f, 1220.f, 1.f};
-    // constexpr Vec4 line_bottom{30.f, 646.f, 1220.f, 1.f};
-    // constexpr Vec4 block{280.f, 110.f, 720.f, 60.f};
-    constexpr Vec4 block{75.f, 110.f, 1220.f-45.f*2, 60.f};
     constexpr float text_xoffset{15.f};
 
-    // todo: cleanup
-    const float x = block.x;
-    float y = GetY() + 1.f + 42.f;
-    const float h = block.h;
-    const float w = block.w;
-
-    nvgSave(vg);
-    nvgScissor(vg, GetX(), GetY(), GetW(), GetH());
-
-    for (std::size_t i = m_index_offset; i < m_entries_current.size(); i++) {
+    m_list->Draw(vg, theme, m_entries_current.size(), [this, text_col](auto* vg, auto* theme, auto v, auto i) {
+        const auto& [x, y, w, h] = v;
         auto& e = GetEntry(i);
 
         if (e.IsDir()) {
@@ -628,7 +614,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
             text_id = ThemeEntryID_TEXT_SELECTED;
             gfx::drawRectOutline(vg, 4.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour, x, y, w, h, theme->elements[ThemeEntryID_SELECTED].colour);
         } else {
-            if (i == m_index_offset) {
+            if (i == m_index) {
                 gfx::drawRect(vg, x, y, w, 1.f, text_col);
             }
             gfx::drawRect(vg, x, y + h, w, 1.f, text_col);
@@ -655,8 +641,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         }
 
         nvgSave(vg);
-        const auto txt_clip = std::min(GetY() + GetH(), y + h) - y;
-        nvgScissor(vg, x + text_xoffset+65, y, w-(x+text_xoffset+65+50), txt_clip);
+        nvgIntersectScissor(vg, x + text_xoffset+65, y, w-(x+text_xoffset+65+50), h);
             gfx::drawText(vg, x + text_xoffset+65, y + (h / 2.f), 20.f, e.name, NULL, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE, theme->elements[text_id].colour);
         nvgRestore(vg);
 
@@ -678,14 +663,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
                 gfx::drawTextArgs(vg, x + w - text_xoffset, y + (h / 2.f) - 3, 16.f, NVG_ALIGN_RIGHT | NVG_ALIGN_BOTTOM, theme->elements[text_id].colour, "%.2f MiB", (double)e.file_size / 1024.0 / 1024.0);
             }
         }
-
-        y += h;
-        if (!InYBounds(y)) {
-            break;
-        }
-    }
-
-    nvgRestore(vg);
+    });
 }
 
 void Menu::OnFocusGained() {
@@ -705,10 +683,10 @@ void Menu::OnFocusGained() {
     }
 }
 
-void Menu::SetIndex(std::size_t index) {
+void Menu::SetIndex(s64 index) {
     m_index = index;
     if (!m_index) {
-        m_index_offset = 0;
+        m_list->SetYoff();
     }
 
     if (!m_entries_current.empty() && !GetEntry().checked_internal_extension && GetEntry().extension == "zip") {
@@ -803,16 +781,14 @@ void Menu::InstallForwarder() {
 auto Menu::Scan(const fs::FsPath& new_path, bool is_walk_up) -> Result {
     log_write("new scan path: %s\n", new_path);
     if (!is_walk_up && !m_path.empty() && !m_entries_current.empty()) {
-        const LastFile f{GetEntry().name, m_index, m_index_offset, m_entries_current.size()};
+        const LastFile f(GetEntry().name, m_index, m_list->GetYoff(), m_entries_current.size());
         m_previous_highlighted_file.emplace_back(f);
     }
 
-    log_write("\nold index: %zu start: %zu\n", m_index, m_index_offset);
-
     m_path = new_path;
     m_entries.clear();
     m_index = 0;
-    m_index_offset = 0;
+    m_list->SetYoff(0);
     SetTitleSubHeading(m_path);
 
     if (m_selected_type == SelectedType::None) {
@@ -1090,7 +1066,7 @@ void Menu::Sort() {
 void Menu::SortAndFindLastFile() {
     std::optional<LastFile> last_file;
     if (!m_path.empty() && !m_entries_current.empty()) {
-        last_file = LastFile{GetEntry().name, m_index, m_index_offset, m_entries_current.size()};
+        last_file = LastFile(GetEntry().name, m_index, m_list->GetYoff(), m_entries_current.size());
     }
 
     Sort();
@@ -1111,21 +1087,21 @@ void Menu::SetIndexFromLastFile(const LastFile& last_file) {
         }
     }
     if (index >= 0) {
-        if ((u64)index == last_file.index && m_entries_current.size() == last_file.entries_count) {
-            m_index_offset = last_file.offset;
+        if (index == last_file.index && m_entries_current.size() == last_file.entries_count) {
+            m_list->SetYoff(last_file.offset);
             log_write("index is the same as last time\n");
         } else {
             // file position changed!
             log_write("file position changed\n");
             // guesstimate where the position is
             if (index >= 8) {
-                m_index_offset = (index - 8) + 1;
+                m_list->SetYoff(((index - 8) + 1) * m_list->GetMaxY());
             } else {
-                m_index_offset = 0;
+                m_list->SetYoff(0);
             }
         }
         SetIndex(index);
-        log_write("\nnew index: %zu start: %zu mod: %zu\n", m_index, m_index_offset, index % 8);
+        log_write("\nnew index: %zu %zu mod: %zu\n", m_index, index % 8);
     }
 }
 

sphaira/source/ui/menus/ghdl.cpp

@@ -182,7 +182,7 @@ auto DownloadApp(ProgressBox* pbox, const GhApiAsset& gh_asset, const AssetEntry
                 }
 
                 std::vector<char> buf(chunk_size);
-                u64 offset{};
+                s64 offset{};
                 while (offset < info.uncompressed_size) {
                     const auto bytes_read = unzReadCurrentFile(zfile, buf.data(), buf.size());
                     if (bytes_read <= 0) {
@@ -248,22 +248,22 @@ Menu::Menu() : MenuBase{"GitHub"_i18n} {
 
     this->SetActions(
         std::make_pair(Button::DOWN, Action{[this](){
-            if (ScrollHelperDown(m_index, m_index_offset, 1, 1, 8, m_entries.size())) {
+            if (m_list->ScrollDown(m_index, 1, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::UP, Action{[this](){
-            if (ScrollHelperUp(m_index, m_index_offset, 1, 1, 8, m_entries.size())) {
+            if (m_list->ScrollUp(m_index, 1, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::DPAD_RIGHT, Action{[this](){
-            if (ScrollHelperDown(m_index, m_index_offset, 8, 1, 8, m_entries.size())) {
+            if (m_list->ScrollDown(m_index, 8, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::DPAD_LEFT, Action{[this](){
-            if (ScrollHelperUp(m_index, m_index_offset, 8, 1, 8, m_entries.size())) {
+            if (m_list->ScrollUp(m_index, 8, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
@@ -363,6 +363,9 @@ Menu::Menu() : MenuBase{"GitHub"_i18n} {
             SetPop();
         }})
     );
+
+    const Vec4 v{75, GetY() + 1.f + 42.f, 1220.f-45.f*2, 60};
+    m_list = std::make_unique<List>(1, 8, m_pos, v);
 }
 
 Menu::~Menu() {
@@ -370,6 +373,14 @@ Menu::~Menu() {
 
 void Menu::Update(Controller* controller, TouchInfo* touch) {
     MenuBase::Update(controller, touch);
+    m_list->OnUpdate(controller, touch, m_entries.size(), [this](auto i) {
+        if (m_index == i) {
+            FireAction(Button::A);
+        } else {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            SetIndex(i);
+        }
+    });
 }
 
 void Menu::Draw(NVGcontext* vg, Theme* theme) {
@@ -382,35 +393,10 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         return;
     }
 
-    const u64 SCROLL = m_index_offset;
-    constexpr u64 max_entry_display = 8;
-    const u64 entry_total = m_entries.size();
-
-    // only draw scrollbar if needed
-    if (entry_total > max_entry_display) {
-        const auto scrollbar_size = 500.f;
-        const auto sb_h = 1.f / (float)entry_total * scrollbar_size;
-        const auto sb_y = SCROLL;
-        gfx::drawRect(vg, SCREEN_WIDTH - 50, 100, 10, scrollbar_size, gfx::getColour(gfx::Colour::BLACK));
-        gfx::drawRect(vg, SCREEN_WIDTH - 50+2, 102 + sb_h * sb_y, 10-4, sb_h + (sb_h * (max_entry_display - 1)) - 4, gfx::getColour(gfx::Colour::SILVER));
-    }
-
-    // constexpr Vec4 line_top{30.f, 86.f, 1220.f, 1.f};
-    // constexpr Vec4 line_bottom{30.f, 646.f, 1220.f, 1.f};
-    // constexpr Vec4 block{280.f, 110.f, 720.f, 60.f};
-    constexpr Vec4 block{75.f, 110.f, 1220.f-45.f*2, 60.f};
     constexpr float text_xoffset{15.f};
 
-    // todo: cleanup
-    const float x = block.x;
-    float y = GetY() + 1.f + 42.f;
-    const float h = block.h;
-    const float w = block.w;
-
-    nvgSave(vg);
-    nvgScissor(vg, GetX(), GetY(), GetW(), GetH());
-
-    for (std::size_t i = m_index_offset; i < m_entries.size(); i++) {
+    m_list->Draw(vg, theme, m_entries.size(), [this, text_col](auto* vg, auto* theme, auto v, auto i) {
+        const auto& [x, y, w, h] = v;
         auto& e = m_entries[i];
 
         auto text_id = ThemeEntryID_TEXT;
@@ -425,20 +411,12 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         }
 
         nvgSave(vg);
-        const auto txt_clip = std::min(GetY() + GetH(), y + h) - y;
-        nvgScissor(vg, x + text_xoffset, y, w-(x+text_xoffset+50), txt_clip);
+        nvgIntersectScissor(vg, x + text_xoffset, y, w-(x+text_xoffset+50), h);
             gfx::drawTextArgs(vg, x + text_xoffset, y + (h / 2.f), 20.f, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE, theme->elements[text_id].colour, "%s By %s", e.repo.c_str(), e.owner.c_str());
         nvgRestore(vg);
 
         gfx::drawTextArgs(vg, x + w - text_xoffset, y + (h / 2.f), 16.f, NVG_ALIGN_RIGHT | NVG_ALIGN_MIDDLE, theme->elements[text_id].colour, "version: %s", e.tag.c_str());
-
-        y += h;
-        if (!InYBounds(y)) {
-            break;
-        }
-    }
-
-    nvgRestore(vg);
+    });
 }
 
 void Menu::OnFocusGained() {
@@ -448,12 +426,16 @@ void Menu::OnFocusGained() {
     }
 }
 
-void Menu::SetIndex(std::size_t index) {
+void Menu::SetIndex(s64 index) {
     m_index = index;
     if (!m_index) {
         m_index_offset = 0;
     }
 
+    if (m_index > m_index_offset && m_index - m_index_offset >= 7) {
+        m_index_offset = m_index - 7;
+    }
+
     SetTitleSubHeading(m_entries[m_index].json_path);
     UpdateSubheading();
 }

sphaira/source/ui/menus/homebrew.cpp

@@ -43,22 +43,22 @@ Menu::Menu() : MenuBase{"Homebrew"_i18n} {
             }
         }}),
         std::make_pair(Button::DOWN, Action{[this](){
-            if (ScrollHelperDown(m_index, m_start, 3, 3, 9, m_entries.size())) {
+            if (m_list->ScrollDown(m_index, 3, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::UP, Action{[this](){
-            if (ScrollHelperUp(m_index, m_start, 3, 3, 9, m_entries.size())) {
+            if (m_list->ScrollUp(m_index, 3, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::R2, Action{[this](){
-            if (ScrollHelperDown(m_index, m_start, 9, 3, 9, m_entries.size())) {
+            if (m_list->ScrollDown(m_index, 9, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::L2, Action{[this](){
-            if (ScrollHelperUp(m_index, m_start, 9, 3, 9, m_entries.size())) {
+            if (m_list->ScrollUp(m_index, 9, m_entries.size())) {
                 SetIndex(m_index);
             }
         }}),
@@ -86,12 +86,12 @@ Menu::Menu() : MenuBase{"Homebrew"_i18n} {
                     order_items.push_back("Decending"_i18n);
                     order_items.push_back("Ascending"_i18n);
 
-                    options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](std::size_t& index_out){
+                    options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](s64& index_out){
                         m_sort.Set(index_out);
                         SortAndFindLastFile();
                     }, m_sort.Get()));
 
-                    options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](std::size_t& index_out){
+                    options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](s64& index_out){
                         m_order.Set(index_out);
                         SortAndFindLastFile();
                     }, m_order.Get()));
@@ -141,6 +141,10 @@ Menu::Menu() : MenuBase{"Homebrew"_i18n} {
             }
         }})
     );
+
+    const Vec4 v{75, 110, 370, 155};
+    const Vec2 pad{10, 10};
+    m_list = std::make_unique<List>(3, 9, m_pos, v, pad);
 }
 
 Menu::~Menu() {
@@ -153,32 +157,25 @@ Menu::~Menu() {
 
 void Menu::Update(Controller* controller, TouchInfo* touch) {
     MenuBase::Update(controller, touch);
+    m_list->OnUpdate(controller, touch, m_entries.size(), [this](auto i) {
+        if (m_index == i) {
+            FireAction(Button::A);
+        } else {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            SetIndex(i);
+        }
+    });
 }
 
 void Menu::Draw(NVGcontext* vg, Theme* theme) {
     MenuBase::Draw(vg, theme);
 
-    const u64 SCROLL = m_start;
-    const u64 max_entry_display = 9;
-    const u64 nro_total = m_entries.size();
-    const u64 cursor_pos = m_index;
-    fs::FsNativeSd fs;
-
-    // only draw scrollbar if needed
-    if (nro_total > max_entry_display) {
-        const auto scrollbar_size = 500.f;
-        const auto sb_h = 3.f / (float)nro_total * scrollbar_size;
-        const auto sb_y = SCROLL / 3.f;
-        gfx::drawRect(vg, SCREEN_WIDTH - 50, 100, 10, scrollbar_size, theme->elements[ThemeEntryID_GRID].colour);
-        gfx::drawRect(vg, SCREEN_WIDTH - 50+2, 102 + sb_h * sb_y, 10-4, sb_h + (sb_h * 2) - 4, theme->elements[ThemeEntryID_TEXT_SELECTED].colour);
-    }
-
     // max images per frame, in order to not hit io / gpu too hard.
     const int image_load_max = 2;
     int image_load_count = 0;
 
-    for (u64 i = 0, pos = SCROLL, y = 110, w = 370, h = 155; pos < nro_total && i < max_entry_display; y += h + 10) {
-        for (u64 j = 0, x = 75; j < 3 && pos < nro_total && i < max_entry_display; j++, i++, pos++, x += w + 10) {
+    m_list->Draw(vg, theme, m_entries.size(), [this, &image_load_count](auto* vg, auto* theme, auto v, auto pos) {
+        const auto& [x, y, w, h] = v;
         auto& e = m_entries[pos];
 
         // lazy load image
@@ -197,23 +194,23 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
         }
 
         auto text_id = ThemeEntryID_TEXT;
-            if (pos == cursor_pos) {
+        if (pos == m_index) {
             text_id = ThemeEntryID_TEXT_SELECTED;
-                gfx::drawRectOutline(vg, 4.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour, x, y, w, h, theme->elements[ThemeEntryID_SELECTED].colour);
+            gfx::drawRectOutline(vg, 4.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour, v, theme->elements[ThemeEntryID_SELECTED].colour);
         } else {
-                DrawElement(x, y, w, h, ThemeEntryID_GRID);
+            DrawElement(v, ThemeEntryID_GRID);
         }
 
         const float image_size = 115;
         gfx::drawImageRounded(vg, x + 20, y + 20, image_size, image_size, e.image ? e.image : App::GetDefaultImage());
 
         nvgSave(vg);
-            nvgScissor(vg, x, y, w - 30.f, h); // clip
+        nvgIntersectScissor(vg, x, y, w - 30.f, h); // clip
         {
             bool has_star = false;
             if (IsStarEnabled()) {
                 if (!e.has_star.has_value()) {
-                        e.has_star = fs.FileExists(GenerateStarPath(e.path));
+                    e.has_star = fs::FsNativeSd().FileExists(GenerateStarPath(e.path));
                 }
                 has_star = e.has_star.value();
             }
@@ -224,8 +221,7 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
             gfx::drawTextArgs(vg, x + 148, y + 115, font_size, NVG_ALIGN_LEFT, theme->elements[text_id].colour, e.GetDisplayVersion());
         }
         nvgRestore(vg);
-        }
-    }
+    });
 }
 
 void Menu::OnFocusGained() {
@@ -235,10 +231,10 @@ void Menu::OnFocusGained() {
     }
 }
 
-void Menu::SetIndex(std::size_t index) {
+void Menu::SetIndex(s64 index) {
     m_index = index;
     if (!m_index) {
-        m_start = 0;
+        m_list->SetYoff(0);
     }
 
     const auto& e = m_entries[m_index];
@@ -428,9 +424,9 @@ void Menu::SortAndFindLastFile() {
     if (index >= 0) {
         // guesstimate where the position is
         if (index >= 9) {
-            m_start = (index - 9) / 3 * 3 + 3;
+            m_list->SetYoff((((index - 9) + 3) / 3) * m_list->GetMaxY());
         } else {
-            m_start = 0;
+            m_list->SetYoff(0);
         }
         SetIndex(index);
     }

sphaira/source/ui/menus/irs_menu.cpp

@@ -139,44 +139,44 @@ Menu::Menu() : MenuBase{"Irs"_i18n} {
             format_str.emplace_back("20x15"_i18n);
         }
 
-        options->Add(std::make_shared<SidebarEntryArray>("Controller"_i18n, controller_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Controller"_i18n, controller_str, [this](s64& index){
             irsStopImageProcessor(m_entries[m_index].m_handle);
             m_index = index;
             UpdateConfig(&m_config);
         }, m_index));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Rotation"_i18n, rotation_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Rotation"_i18n, rotation_str, [this](s64& index){
             m_rotation = (Rotation)index;
         }, m_rotation));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Colour"_i18n, colour_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Colour"_i18n, colour_str, [this](s64& index){
             m_colour = (Colour)index;
             updateColourArray();
         }, m_colour));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Light Target"_i18n, light_target_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Light Target"_i18n, light_target_str, [this](s64& index){
             m_config.light_target = index;
             UpdateConfig(&m_config);
         }, m_config.light_target));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Gain"_i18n, gain_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Gain"_i18n, gain_str, [this](s64& index){
             m_config.gain = GAIN_MIN + index;
             UpdateConfig(&m_config);
         }, m_config.gain - GAIN_MIN));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Negative Image"_i18n, is_negative_image_used_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Negative Image"_i18n, is_negative_image_used_str, [this](s64& index){
             m_config.is_negative_image_used = index;
             UpdateConfig(&m_config);
         }, m_config.is_negative_image_used));
 
-        options->Add(std::make_shared<SidebarEntryArray>("Format"_i18n, format_str, [this](std::size_t& index){
+        options->Add(std::make_shared<SidebarEntryArray>("Format"_i18n, format_str, [this](s64& index){
             m_config.orig_format = index;
             m_config.trimming_format = index;
             UpdateConfig(&m_config);
         }, m_config.orig_format));
 
         if (hosversionAtLeast(4,0,0)) {
-            options->Add(std::make_shared<SidebarEntryArray>("Trimming Format"_i18n, format_str, [this](std::size_t& index){
+            options->Add(std::make_shared<SidebarEntryArray>("Trimming Format"_i18n, format_str, [this](s64& index){
             // you cannot set trim a larger region than the source
             if (index < m_config.orig_format) {
                 index = m_config.orig_format;

sphaira/source/ui/menus/main_menu.cpp

@@ -115,7 +115,7 @@ auto InstallUpdate(ProgressBox* pbox, const std::string url, const std::string v
                 }
 
                 std::vector<char> buf(chunk_size);
-                u64 offset{};
+                s64 offset{};
                 while (offset < info.uncompressed_size) {
                     const auto bytes_read = unzReadCurrentFile(zfile, buf.data(), buf.size());
                     if (bytes_read <= 0) {
@@ -205,9 +205,6 @@ MainMenu::MainMenu() {
         }
     });
 
-    AddOnLPress();
-    AddOnRPress();
-
     this->SetActions(
         std::make_pair(Button::START, Action{App::Exit}),
         std::make_pair(Button::Y, Action{"Menu"_i18n, [this](){
@@ -229,8 +226,6 @@ MainMenu::MainMenu() {
             language_items.push_back("Russian"_i18n);
             language_items.push_back("Swedish"_i18n);
 
-            options->AddHeader("Header"_i18n);
-            options->AddSpacer();
             options->Add(std::make_shared<SidebarEntryCallback>("Theme"_i18n, [this](){
                 SidebarEntryArray::Items theme_items{};
                 const auto theme_meta = App::GetThemeMetaList();
@@ -241,7 +236,7 @@ MainMenu::MainMenu() {
                 auto options = std::make_shared<Sidebar>("Theme Options"_i18n, Sidebar::Side::LEFT);
                 ON_SCOPE_EXIT(App::Push(options));
 
-                options->Add(std::make_shared<SidebarEntryArray>("Select Theme"_i18n, theme_items, [this, theme_items](std::size_t& index_out){
+                options->Add(std::make_shared<SidebarEntryArray>("Select Theme"_i18n, theme_items, [this, theme_items](s64& index_out){
                     App::SetTheme(index_out);
                 }, App::GetThemeIndex()));
 
@@ -294,9 +289,9 @@ MainMenu::MainMenu() {
                 }
             }));
 
-            options->Add(std::make_shared<SidebarEntryArray>("Language"_i18n, language_items, [this](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Language"_i18n, language_items, [this](s64& index_out){
                 App::SetLanguage(index_out);
-            }, (std::size_t)App::GetLanguage()));
+            }, (s64)App::GetLanguage()));
 
             options->Add(std::make_shared<SidebarEntryCallback>("Misc"_i18n, [this](){
                 auto options = std::make_shared<Sidebar>("Misc Options"_i18n, Sidebar::Side::LEFT);
@@ -341,9 +336,9 @@ MainMenu::MainMenu() {
                     App::SetInstallEnable(enable);
                 }, "Enabled"_i18n, "Disabled"_i18n));
 
-                options->Add(std::make_shared<SidebarEntryArray>("Install location"_i18n, install_items, [this](std::size_t& index_out){
+                options->Add(std::make_shared<SidebarEntryArray>("Install location"_i18n, install_items, [this](s64& index_out){
                     App::SetInstallSdEnable(index_out);
-                }, (std::size_t)App::GetInstallSdEnable()));
+                }, (s64)App::GetInstallSdEnable()));
 
                 options->Add(std::make_shared<SidebarEntryBool>("Show install warning"_i18n, App::GetInstallPrompt(), [this](bool& enable){
                     App::SetInstallPrompt(enable);
@@ -357,6 +352,8 @@ MainMenu::MainMenu() {
     m_app_store_menu = std::make_shared<appstore::Menu>(m_homebrew_menu->GetHomebrewList());
     m_current_menu = m_homebrew_menu;
 
+    AddOnLRPress();
+
     for (auto [button, action] : m_actions) {
         m_current_menu->SetAction(button, action);
     }
@@ -389,17 +386,11 @@ void MainMenu::OnLRPress(std::shared_ptr<MenuBase> menu, Button b) {
     if (m_current_menu == m_homebrew_menu) {
         m_current_menu = menu;
         RemoveAction(b);
-        if (b == Button::L) {
-            AddOnRPress();
-        } else {
-            AddOnLPress();
-        }
     } else {
         m_current_menu = m_homebrew_menu;
-        AddOnRPress();
-        AddOnLPress();
     }
 
+    AddOnLRPress();
     m_current_menu->OnFocusGained();
 
     for (auto [button, action] : m_actions) {
@@ -407,18 +398,20 @@ void MainMenu::OnLRPress(std::shared_ptr<MenuBase> menu, Button b) {
     }
 }
 
-void MainMenu::AddOnLPress() {
+void MainMenu::AddOnLRPress() {
+    if (m_current_menu != m_filebrowser_menu) {
         const auto label = m_current_menu == m_homebrew_menu ? "Files" : "Apps";
         SetAction(Button::L, Action{i18n::get(label), [this]{
             OnLRPress(m_filebrowser_menu, Button::L);
         }});
     }
 
-void MainMenu::AddOnRPress() {
+    if (m_current_menu != m_app_store_menu) {
         const auto label = m_current_menu == m_homebrew_menu ? "Store" : "Apps";
         SetAction(Button::R, Action{i18n::get(label), [this]{
             OnLRPress(m_app_store_menu, Button::R);
         }});
     }
+}
 
 } // namespace sphaira::ui::menu::main

sphaira/source/ui/menus/menu_base.cpp

@@ -103,61 +103,4 @@ void MenuBase::UpdateVars() {
     m_poll_timestamp.Update();
 }
 
-auto MenuBase::ScrollHelperDown(u64& index, u64& start, u64 step, s64 row, s64 page, u64 size) -> bool {
-    const auto old_index = index;
-
-    if (!size) {
-        return false;
-    }
-
-    if (index + step < size) {
-        index += step;
-    } else {
-        index = size - 1;
-    }
-
-    if (index != old_index) {
-        App::PlaySoundEffect(SoundEffect_Scroll);
-        s64 delta = index - old_index;
-
-        if (index - start >= page) {
-            do {
-                start += row;
-                delta -= row;
-            } while (delta > 0 && start + page < size);
-        }
-
-        return true;
-    }
-
-    return false;
-}
-
-auto MenuBase::ScrollHelperUp(u64& index, u64& start, s64 step, s64 row, s64 page, s64 size) -> bool {
-    const auto old_index = index;
-
-    if (!size) {
-        return false;
-    }
-
-    if (index >= step) {
-        index -= step;
-    } else {
-        index = 0;
-    }
-
-    if (index != old_index) {
-        App::PlaySoundEffect(SoundEffect_Scroll);
-        // if ()
-        while (index < start) {
-            // log_write("moved up\n");
-            start -= row;
-        }
-
-        return true;
-    }
-
-    return false;
-}
-
 } // namespace sphaira::ui::menu

sphaira/source/ui/menus/themezer.cpp

@@ -369,7 +369,7 @@ auto InstallTheme(ProgressBox* pbox, const PackListEntry& entry) -> bool {
             }
 
             std::vector<char> buf(chunk_size);
-            u64 offset{};
+            s64 offset{};
             while (offset < info.uncompressed_size) {
                 if (pbox->ShouldExit()) {
                     return false;
@@ -429,25 +429,25 @@ Menu::Menu() : MenuBase{"Themezer"_i18n} {
         }}),
         std::make_pair(Button::DOWN, Action{[this](){
             const auto& page = m_pages[m_page_index];
-            if (ScrollHelperDown(m_index, m_start, 3, 3, 6, page.m_packList.size())) {
+            if (m_list->ScrollDown(m_index, 3, page.m_packList.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::UP, Action{[this](){
             const auto& page = m_pages[m_page_index];
-            if (ScrollHelperUp(m_index, m_start, 3, 3, 6, page.m_packList.size())) {
+            if (m_list->ScrollUp(m_index, 3, page.m_packList.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::R2, Action{[this](){
             const auto& page = m_pages[m_page_index];
-            if (ScrollHelperDown(m_index, m_start, 6, 3, 6, page.m_packList.size())) {
+            if (m_list->ScrollDown(m_index, 6, page.m_packList.size())) {
                 SetIndex(m_index);
             }
         }}),
         std::make_pair(Button::L2, Action{[this](){
             const auto& page = m_pages[m_page_index];
-            if (ScrollHelperUp(m_index, m_start, 6, 3, 6, page.m_packList.size())) {
+            if (m_list->ScrollUp(m_index, 6, page.m_packList.size())) {
                 SetIndex(m_index);
             }
         }}),
@@ -492,14 +492,14 @@ Menu::Menu() : MenuBase{"Themezer"_i18n} {
                 InvalidateAllPages();
             }, "Enabled"_i18n, "Disabled"_i18n));
 
-            options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Sort"_i18n, sort_items, [this, sort_items](s64& index_out){
                 if (m_sort.Get() != index_out) {
                     m_sort.Set(index_out);
                     InvalidateAllPages();
                 }
             }, m_sort.Get()));
 
-            options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](std::size_t& index_out){
+            options->Add(std::make_shared<SidebarEntryArray>("Order"_i18n, order_items, [this, order_items](s64& index_out){
                 if (m_order.Get() != index_out) {
                     m_order.Set(index_out);
                     InvalidateAllPages();
@@ -545,6 +545,10 @@ Menu::Menu() : MenuBase{"Themezer"_i18n} {
     m_page_index = 0;
     m_pages.resize(1);
     PackListDownload();
+
+    const Vec4 v{75, 110, 350, 250};
+    const Vec2 pad{10, 10};
+    m_list = std::make_unique<List>(3, 6, m_pos, v, pad);
 }
 
 Menu::~Menu() {
@@ -553,6 +557,24 @@ Menu::~Menu() {
 
 void Menu::Update(Controller* controller, TouchInfo* touch) {
     MenuBase::Update(controller, touch);
+
+    if (m_pages.empty()) {
+        return;
+    }
+
+    const auto& page = m_pages[m_page_index];
+    if (page.m_ready != PageLoadState::Done) {
+        return;
+    }
+
+    m_list->OnUpdate(controller, touch, page.m_packList.size(), [this](auto i) {
+        if (m_index == i) {
+            FireAction(Button::A);
+        } else {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            SetIndex(i);
+        }
+    });
 }
 
 void Menu::Draw(NVGcontext* vg, Theme* theme) {
@@ -579,34 +601,16 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
             return;
     }
 
-    const u64 SCROLL = m_start;
-    const u64 max_entry_display = 9;
-    const u64 nro_total = page.m_packList.size();// m_entries_current.size();
-    const u64 cursor_pos = m_index;
-
-    // only draw scrollbar if needed
-    if (nro_total > max_entry_display) {
-        const auto scrollbar_size = 500.f;
-        const auto sb_h = 3.f / (float)(nro_total + 3) * scrollbar_size;
-        const auto sb_y = SCROLL / 3.f;
-        gfx::drawRect(vg, SCREEN_WIDTH - 50, 100, 10, scrollbar_size, theme->elements[ThemeEntryID_GRID].colour);
-        gfx::drawRect(vg, SCREEN_WIDTH - 50+2, 102 + sb_h * sb_y, 10-4, sb_h + (sb_h * 2) - 4, theme->elements[ThemeEntryID_TEXT_SELECTED].colour);
-    }
-
     // max images per frame, in order to not hit io / gpu too hard.
     const int image_load_max = 2;
     int image_load_count = 0;
 
-    nvgSave(vg);
-    nvgScissor(vg, 30, 87, 1220 - 30, 646 - 87); // clip
-
-    for (u64 i = 0, pos = SCROLL, y = 110, w = 350, h = 250; pos < nro_total && i < max_entry_display; y += h + 10) {
-        for (u64 j = 0, x = 75; j < 3 && pos < nro_total && i < max_entry_display; j++, i++, pos++, x += w + 10) {
-            const auto index = pos;
-            auto& e = page.m_packList[index];
+    m_list->Draw(vg, theme, page.m_packList.size(), [this, &page, &image_load_count](auto* vg, auto* theme, auto v, auto pos) {
+        const auto& [x, y, w, h] = v;
+        auto& e = page.m_packList[pos];
 
         auto text_id = ThemeEntryID_TEXT;
-            if (pos == cursor_pos) {
+        if (pos == m_index) {
             text_id = ThemeEntryID_TEXT_SELECTED;
             gfx::drawRectOutline(vg, 4.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour, x, y, w, h, theme->elements[ThemeEntryID_SELECTED].colour);
         } else {
@@ -676,12 +680,14 @@ void Menu::Draw(NVGcontext* vg, Theme* theme) {
             gfx::drawImageRounded(vg, x + xoff, y, 320, 180, image.image ? image.image : App::GetDefaultImage());
         }
 
+        nvgSave(vg);
+        nvgIntersectScissor(vg, x, y, w - 30.f, h); // clip
+        {
             gfx::drawTextArgs(vg, x + xoff, y + 180 + 20, 18, NVG_ALIGN_LEFT, theme->elements[text_id].colour, "%s", e.details.name.c_str());
             gfx::drawTextArgs(vg, x + xoff, y + 180 + 55, 18, NVG_ALIGN_LEFT, theme->elements[text_id].colour, "%s", e.creator.display_name.c_str());
         }
-    }
-
         nvgRestore(vg);
+    });
 }
 
 void Menu::OnFocusGained() {
@@ -704,7 +710,7 @@ void Menu::PackListDownload() {
     SetSubHeading(subheading);
 
     m_index = 0;
-    m_start = 0;
+    m_list->SetYoff(0);
 
     // already downloaded
     if (m_pages[m_page_index].m_ready != PageLoadState::None) {

sphaira/source/ui/notification.cpp

@@ -11,10 +11,6 @@ NotifEntry::NotifEntry(std::string text, Side side)
 , m_side{side} {
 }
 
-auto NotifEntry::OnLayoutChange() -> void {
-
-}
-
 auto NotifEntry::Draw(NVGcontext* vg, Theme* theme, float y) -> bool {
     m_pos.y = y;
     Draw(vg, theme);
@@ -57,11 +53,6 @@ auto NotifEntry::Draw(NVGcontext* vg, Theme* theme) -> void {
     gfx::drawText(vg, Vec2{m_pos.x + (m_pos.w / 2.f), m_pos.y + (m_pos.h / 2.f)}, font_size, text_col, m_text.c_str(), NVG_ALIGN_MIDDLE | NVG_ALIGN_CENTER);
 }
 
-auto NotifMananger::OnLayoutChange() -> void {
-    mutexLock(&m_mutex);
-    ON_SCOPE_EXIT(mutexUnlock(&m_mutex));
-}
-
 auto NotifMananger::Draw(NVGcontext* vg, Theme* theme) -> void {
     mutexLock(&m_mutex);
     ON_SCOPE_EXIT(mutexUnlock(&m_mutex));

sphaira/source/ui/nvg_util.cpp

@@ -77,6 +77,19 @@ inline void drawRectOutlineInternal(NVGcontext* vg, float size, const NVGcolor&
     float gradientX, gradientY, color;
     getHighlightAnimation(&gradientX, &gradientY, &color);
 
+#if 1
+    // NVGcolor pulsationColor = nvgRGBAf((color * out_col.r) + (1 - color) * out_col.r,
+    //         (color * out_col.g) + (1 - color) * out_col.g,
+    //         (color * out_col.b) + (1 - color) * out_col.b,
+    //         out_col.a);
+    NVGcolor pulsationColor = nvgRGBAf((color * out_col.r) + (1 - color) * out_col.r,
+            (color * out_col.g) + (1 - color) * out_col.g,
+            (color * out_col.b) + (1 - color) * out_col.b,
+            out_col.a);
+
+    drawRectIntenal(vg, {vec.x-size,vec.y-size,vec.w+(size*2.f),vec.h+(size * 2.f)}, pulsationColor, false);
+    drawRectIntenal(vg, vec, c, false);
+#else
     const auto strokeWidth = 5.0;
     auto v2 = vec;
     v2.x -= strokeWidth / 2.0;
@@ -85,8 +98,8 @@ inline void drawRectOutlineInternal(NVGcontext* vg, float size, const NVGcolor&
     v2.h += strokeWidth;
     const auto corner_radius = 0.5;
 
-    nvgSave(vg);
-    nvgResetScissor(vg);
+    // nvgSave(vg);
+    // nvgResetScissor(vg);
 
     // const auto stroke_width = 5.0f;
     // const auto shadow_corner_radius = 6.0f;
@@ -155,7 +168,8 @@ inline void drawRectOutlineInternal(NVGcontext* vg, float size, const NVGcolor&
     nvgFillColor(vg, c);
     nvgFill(vg);
 
-    nvgRestore(vg);
+    // nvgRestore(vg);
+#endif
 }
 
 inline void drawRectOutlineInternal(NVGcontext* vg, float size, const NVGcolor& out_col, Vec4 vec, const NVGpaint& p) {
@@ -291,7 +305,7 @@ void textBounds(NVGcontext* vg, float x, float y, float *bounds, const char* str
 void dimBackground(NVGcontext* vg) {
     // drawRectIntenal(vg, {0.f,0.f,1280.f,720.f}, nvgRGBA(30,30,30,180));
     // drawRectIntenal(vg, {0.f,0.f,1920.f,1080.f}, nvgRGBA(20, 20, 20, 225), false);
-    drawRectIntenal(vg, {0.f,0.f,1920.f,1080.f}, nvgRGBA(0, 0, 0, 220), false);
+    drawRectIntenal(vg, {0.f,0.f,1920.f,1080.f}, nvgRGBA(0, 0, 0, 230), false);
 }
 
 void drawRect(NVGcontext* vg, float x, float y, float w, float h, Colour c, bool rounded) {
@@ -453,58 +467,47 @@ void drawTextArgs(NVGcontext* vg, float x, float y, float size, int align, Colou
     drawTextIntenal(vg, {x, y}, size, buffer, nullptr, align, getColour(c));
 }
 
-void drawButton(NVGcontext* vg, float x, float y, float size, Button button) {
-    drawText(vg, x, y, size, getButton(button), nullptr, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE, getColour(Colour::WHITE));
-}
+void drawScrollbar(NVGcontext* vg, Theme* theme, float x, float y, float h, u32 index_off, u32 count, u32 max_per_page) {
+    const s64 SCROLL = index_off;
+    const s64 max_entry_display = max_per_page;
+    const s64 entry_total = count;
+    const float scc2 = 8.0;
+    const float scw = 2.0;
 
-void drawButtons(NVGcontext* vg, const Widget::Actions& _actions, const NVGcolor& c, float start_x) {
-    nvgBeginPath(vg);
-    nvgFontSize(vg, 24.f);
-    nvgTextAlign(vg, NVG_ALIGN_RIGHT | NVG_ALIGN_TOP);
-    nvgFillColor(vg, c);
-
-    float x = start_x;
-    const float y = 675.f;
-    float bounds[4]{};
-
-    // swaps L/R position, idc how shit this is, it's called once per frame.
-    std::vector<std::pair<Button, Action>> actions;
-    actions.reserve(_actions.size());
-
-    for (const auto a: _actions) {
-        // swap
-        if (a.first == Button::R && actions.size() && actions.back().first == Button::L) {
-            const auto s = actions.back();
-            actions.back() = a;
-            actions.emplace_back(s);
-
-        } else {
-            actions.emplace_back(a);
+    // only draw scrollbar if needed
+    if (entry_total > max_entry_display) {
+        const float sb_h = 1.f / (float)entry_total * h;
+        const float sb_y = SCROLL;
+        gfx::drawRect(vg, x, y, scc2, h, theme->elements[ThemeEntryID_GRID].colour, false);
+        gfx::drawRect(vg, x + scw, y + scw + sb_h * sb_y, scc2 - scw * 2, sb_h * float(max_entry_display) - scw * 2, theme->elements[ThemeEntryID_TEXT_SELECTED].colour, false);
     }
 }
 
-    for (const auto& [button, action] : actions) {
-        if (action.IsHidden() || action.m_hint.empty()) {
-            continue;
+void drawScrollbar(NVGcontext* vg, Theme* theme, u32 index_off, u32 count, u32 max_per_page) {
+    // drawScrollbar(vg, SCREEN_WIDTH - 50, 100, 500, index_off, count, max_per_page);
+    drawScrollbar(vg, theme, SCREEN_WIDTH - 50, 100, SCREEN_HEIGHT-200, index_off, count, max_per_page);
 }
-        nvgFontSize(vg, 20.f);
-        nvgTextBounds(vg, x, y, action.m_hint.c_str(), nullptr, bounds);
-        auto len = bounds[2] - bounds[0];
-        nvgText(vg, x, y, action.m_hint.c_str(), nullptr);
 
-        x -= len + 8.f;
-        nvgFontSize(vg, 26.f);
-        nvgTextBounds(vg, x, y - 7.f, getButton(button), nullptr, bounds);
-        len = bounds[2] - bounds[0];
-        nvgText(vg, x, y - 4.f, getButton(button), nullptr);
-        x -= len + 34.f;
+void drawScrollbar2(NVGcontext* vg, Theme* theme, float x, float y, float h, s64 index_off, s64 count, s64 row, s64 page) {
+    // round up
+    if (count % row) {
+        count = count + (row - count % row);
+    }
+
+    const float scc2 = 8.0;
+    const float scw = 2.0;
+
+    // only draw scrollbar if needed
+    if (count > page) {
+        const float sb_h = 1.f / (float)count * h;
+        const float sb_y = index_off;
+        gfx::drawRect(vg, x, y, scc2, h, theme->elements[ThemeEntryID_GRID].colour, false);
+        gfx::drawRect(vg, x + scw, y + scw + sb_h * sb_y, scc2 - scw * 2, sb_h * float(page) - scw * 2, theme->elements[ThemeEntryID_TEXT_SELECTED].colour, false);
     }
 }
 
-// from gc installer
-void drawDimBackground(NVGcontext* vg) {
-    // drawRect(vg, 0, 0, 1920, 1080, nvgRGBA(20, 20, 20, 225));
-    drawRect(vg, 0, 0, 1920, 1080, nvgRGBA(0, 0, 0, 220));
+void drawScrollbar2(NVGcontext* vg, Theme* theme, s64 index_off, s64 count, s64 row, s64 page) {
+    drawScrollbar2(vg, theme, SCREEN_WIDTH - 50, 100, SCREEN_HEIGHT-200, index_off, count, row, page);
 }
 
 #define HIGHLIGHT_SPEED 350.0

sphaira/source/ui/option_box.cpp

@@ -45,7 +45,7 @@ OptionBox::OptionBox(const std::string& message, const Option& a, const Option&
 
 }
 
-OptionBox::OptionBox(const std::string& message, const Option& a, const Option& b, std::size_t index, Callback cb)
+OptionBox::OptionBox(const std::string& message, const Option& a, const Option& b, s64 index, Callback cb)
 : m_message{message}
 , m_callback{cb} {
 
@@ -70,7 +70,7 @@ OptionBox::OptionBox(const std::string& message, const Option& a, const Option&
 
 }
 
-OptionBox::OptionBox(const std::string& message, const Option& a, const Option& b, const Option& c, std::size_t index, Callback cb)
+OptionBox::OptionBox(const std::string& message, const Option& a, const Option& b, const Option& c, s64 index, Callback cb)
 : m_message{message}
 , m_callback{cb} {
 
@@ -79,26 +79,16 @@ OptionBox::OptionBox(const std::string& message, const Option& a, const Option&
 auto OptionBox::Update(Controller* controller, TouchInfo* touch) -> void {
     Widget::Update(controller, touch);
 
-    // if (!controller->GotDown(Button::ANY_HORIZONTAL)) {
-    //     return;
-    // }
-
-    // const auto old_index = m_index;
-
-    // if (controller->GotDown(Button::LEFT) && m_index) {
-    //     m_index--;
-    // } else if (controller->GotDown(Button::RIGHT) && m_index < (m_entries.size() - 1)) {
-    //     m_index++;
-    // }
-
-    // if (old_index != m_index) {
-    //     m_entries[old_index].Selected(false);
-    //     m_entries[m_index].Selected(true);
-    // }
+    if (touch->is_clicked) {
+        for (s64 i = 0; i < m_entries.size(); i++) {
+            auto& e = m_entries[i];
+            if (touch->in_range(e.GetPos())) {
+                SetIndex(i);
+                FireAction(Button::A);
+                break;
+            }
+        }
     }
-
-auto OptionBox::OnLayoutChange() -> void {
-
 }
 
 auto OptionBox::Draw(NVGcontext* vg, Theme* theme) -> void {
@@ -128,26 +118,20 @@ auto OptionBox::OnFocusLost() noexcept -> void {
     SetHidden(true);
 }
 
-auto OptionBox::Setup(std::size_t index) -> void {
-    m_index = std::min(m_entries.size() - 1, index);
+auto OptionBox::Setup(s64 index) -> void {
+    m_index = std::min<s64>(m_entries.size() - 1, index);
     m_entries[m_index].Selected(true);
     m_spacer_line = Vec4{m_pos.x, m_pos.y + 220.f - 2.f, m_pos.w, 2.f};
 
     SetActions(
         std::make_pair(Button::LEFT, Action{[this](){
             if (m_index) {
-                m_entries[m_index].Selected(false);
-                m_index--;
-                m_entries[m_index].Selected(true);
-                App::PlaySoundEffect(SoundEffect_Focus);
+                SetIndex(m_index - 1);
             }
         }}),
         std::make_pair(Button::RIGHT, Action{[this](){
             if (m_index < (m_entries.size() - 1)) {
-                m_entries[m_index].Selected(false);
-                m_index++;
-                m_entries[m_index].Selected(true);
-                App::PlaySoundEffect(SoundEffect_Focus);
+                SetIndex(m_index + 1);
             }
         }}),
         std::make_pair(Button::A, Action{[this](){
@@ -161,4 +145,12 @@ auto OptionBox::Setup(std::size_t index) -> void {
     );
 }
 
+void OptionBox::SetIndex(s64 index) {
+    if (m_index != index) {
+        m_entries[m_index].Selected(false);
+        m_index = index;
+        m_entries[m_index].Selected(true);
+    }
+}
+
 } // namespace sphaira::ui

sphaira/source/ui/option_list.cpp

@@ -1,33 +0,0 @@
-#include "ui/option_list.hpp"
-#include "app.hpp"
-#include "ui/nvg_util.hpp"
-#include "i18n.hpp"
-
-namespace sphaira::ui {
-
-OptionList::OptionList(Options options)
-: m_options{std::move(options)} {
-    SetAction(Button::A, Action{"Select"_i18n, [this](){
-        const auto& [_, func] = m_options[m_index];
-        func();
-        SetPop();
-    }});
-
-    SetAction(Button::B, Action{"Back"_i18n, [this](){
-        SetPop();
-    }});
-}
-
-auto OptionList::Update(Controller* controller, TouchInfo* touch) -> void {
-
-}
-
-auto OptionList::OnLayoutChange() -> void {
-
-}
-
-auto OptionList::Draw(NVGcontext* vg, Theme* theme) -> void {
-
-}
-
-} // namespace sphaira::ui

sphaira/source/ui/popup_list.cpp

@@ -5,7 +5,7 @@
 
 namespace sphaira::ui {
 
-PopupList::PopupList(std::string title, Items items, std::string& index_str_ref, std::size_t& index_ref)
+PopupList::PopupList(std::string title, Items items, std::string& index_str_ref, s64& index_ref)
 : PopupList{std::move(title), std::move(items), Callback{}, index_ref}  {
 
     m_callback = [&index_str_ref, &index_ref, this](auto op_idx) {
@@ -22,7 +22,9 @@ PopupList::PopupList(std::string title, Items items, std::string& index_ref)
     const auto it = std::find(m_items.cbegin(), m_items.cend(), index_ref);
     if (it != m_items.cend()) {
         m_index = std::distance(m_items.cbegin(), it);
-        m_selected_y = m_line_top + 1.f + 42.f + (static_cast<float>(m_index) * m_block.h);
+        if (m_index >= 7) {
+            m_index_offset = m_index - 6;
+        }
     }
 
     m_callback = [&index_ref, this](auto op_idx) {
@@ -32,7 +34,7 @@ PopupList::PopupList(std::string title, Items items, std::string& index_ref)
     };
 }
 
-PopupList::PopupList(std::string title, Items items, std::size_t& index_ref)
+PopupList::PopupList(std::string title, Items items, s64& index_ref)
 : PopupList{std::move(title), std::move(items), Callback{}, index_ref}  {
 
     m_callback = [&index_ref, this](auto op_idx) {
@@ -47,28 +49,29 @@ PopupList::PopupList(std::string title, Items items, Callback cb, std::string in
 
     const auto it = std::find(m_items.cbegin(), m_items.cend(), index);
     if (it != m_items.cend()) {
-        m_index = std::distance(m_items.cbegin(), it);
-        m_selected_y = m_line_top + 1.f + 42.f + (static_cast<float>(m_index) * m_block.h);
+        SetIndex(std::distance(m_items.cbegin(), it));
+        if (m_index >= 7) {
+            m_index_offset = m_index - 6;
+        }
     }
 }
 
-PopupList::PopupList(std::string title, Items items, Callback cb, std::size_t index)
+PopupList::PopupList(std::string title, Items items, Callback cb, s64 index)
 : m_title{std::move(title)}
 , m_items{std::move(items)}
 , m_callback{cb}
 , m_index{index} {
-
-    m_pos.w = 1280.f;
-    const float a = std::min(405.f, (60.f * static_cast<float>(m_items.size())));
-    m_pos.h = 80.f + 140.f + a;
-    m_pos.y = 720.f - m_pos.h;
-    m_line_top = m_pos.y + 70.f;
-    m_line_bottom = 720.f - 73.f;
-    m_selected_y = m_line_top + 1.f + 42.f + (static_cast<float>(m_index) * m_block.h);
-
-    m_scrollbar.Setup(Vec4{1220.f, m_line_top, 1.f, m_line_bottom - m_line_top}, m_block.h, m_items.size());
-
-    SetActions(
+    this->SetActions(
+        std::make_pair(Button::DOWN, Action{[this](){
+            if (m_list->ScrollDown(m_index, 1, m_items.size())) {
+                SetIndex(m_index);
+            }
+        }}),
+        std::make_pair(Button::UP, Action{[this](){
+            if (m_list->ScrollUp(m_index, 1, m_items.size())) {
+                SetIndex(m_index);
+            }
+        }}),
         std::make_pair(Button::A, Action{"Select"_i18n, [this](){
             if (m_callback) {
                 m_callback(m_index);
@@ -76,48 +79,33 @@ PopupList::PopupList(std::string title, Items items, Callback cb, std::size_t in
             SetPop();
         }}),
         std::make_pair(Button::B, Action{"Back"_i18n, [this](){
-            if (m_callback) {
-                m_callback(std::nullopt);
-            }
             SetPop();
         }})
     );
+
+    m_pos.w = 1280.f;
+    const float a = std::min(405.f, (60.f * static_cast<float>(m_items.size())));
+    m_pos.h = 80.f + 140.f + a;
+    m_pos.y = 720.f - m_pos.h;
+    m_line_top = m_pos.y + 70.f;
+    m_line_bottom = 720.f - 73.f;
+    if (m_index >= 7) {
+        m_index_offset = m_index - 6;
+    }
+
+    Vec4 v{m_block};
+    v.y = m_line_top + 1.f + 42.f;
+    const Vec4 pos{0, m_line_top, 1280.f, m_line_bottom - m_line_top};
+    m_list = std::make_unique<List>(1, 7, pos, v);
+    m_list->SetScrollBarPos(1250, m_line_top + 20, m_line_bottom - m_line_top - 40);
 }
 
 auto PopupList::Update(Controller* controller, TouchInfo* touch) -> void {
     Widget::Update(controller, touch);
-
-    if (!controller->GotDown(Button::ANY_VERTICAL)) {
-        return;
-    }
-
-    const auto old_index = m_index;
-
-    if (controller->GotDown(Button::DOWN) && m_index < (m_items.size() - 1)) {
-        m_index++;
-        m_selected_y += m_block.h;
-    } else if (controller->GotDown(Button::UP) && m_index != 0) {
-        m_index--;
-        m_selected_y -= m_block.h;
-    }
-
-    if (old_index != m_index) {
-        App::PlaySoundEffect(SoundEffect_Scroll);
-        OnLayoutChange();
-    }
-}
-
-auto PopupList::OnLayoutChange() -> void {
-    if ((m_selected_y + m_block.h) > m_line_bottom) {
-        m_selected_y -= m_block.h;
-        m_index_offset++;
-        m_scrollbar.Move(ScrollBar::Direction::DOWN);
-    } else if (m_selected_y <= m_line_top) {
-        m_selected_y += m_block.h;
-        m_index_offset--;
-        m_scrollbar.Move(ScrollBar::Direction::UP);
-    }
-    // LOG("sely: %.2f, index_off: %lu\n", m_selected_y, m_index_offset);
+    m_list->OnUpdate(controller, touch, m_items.size(), [this](auto i) {
+        SetIndex(i);
+        FireAction(Button::A);
+    });
 }
 
 auto PopupList::Draw(NVGcontext* vg, Theme* theme) -> void {
@@ -127,16 +115,8 @@ auto PopupList::Draw(NVGcontext* vg, Theme* theme) -> void {
     gfx::drawRect(vg, 30.f, m_line_top, m_line_width, 1.f, theme->elements[ThemeEntryID_TEXT].colour);
     gfx::drawRect(vg, 30.f, m_line_bottom, m_line_width, 1.f, theme->elements[ThemeEntryID_TEXT].colour);
 
-    // todo: cleanup
-    const float x = m_block.x;
-    float y = m_line_top + 1.f + 42.f;
-    const float h = m_block.h;
-    const float w = m_block.w;
-
-    nvgSave(vg);
-    nvgScissor(vg, 0, m_line_top, 1280.f, m_line_bottom - m_line_top);
-
-    for (std::size_t i = m_index_offset; i < m_items.size(); ++i) {
+    m_list->Draw(vg, theme, m_items.size(), [this](auto* vg, auto* theme, auto v, auto i) {
+        const auto& [x, y, w, h] = v;
         if (m_index == i) {
             gfx::drawRect(vg, x - 4.f, y - 4.f, w + 8.f, h + 8.f, theme->elements[ThemeEntryID_SELECTED_OVERLAY].colour);
             gfx::drawRect(vg, x, y, w, h, theme->elements[ThemeEntryID_SELECTED].colour);
@@ -146,14 +126,8 @@ auto PopupList::Draw(NVGcontext* vg, Theme* theme) -> void {
             gfx::drawRect(vg, x, y + h, w, 1.f, theme->elements[ThemeEntryID_TEXT].colour);
             gfx::drawText(vg, x + m_text_xoffset, y + (h / 2.f), 20.f, m_items[i].c_str(), NULL, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE, theme->elements[ThemeEntryID_TEXT].colour);
         }
-        y += h;
-        if (y > m_line_bottom) {
-            break;
-        }
-    }
-    nvgRestore(vg);
+    });
 
-    m_scrollbar.Draw(vg, theme);
     Widget::Draw(vg, theme);
 }
 
@@ -167,4 +141,12 @@ auto PopupList::OnFocusLost() noexcept -> void {
     SetHidden(true);
 }
 
+void PopupList::SetIndex(s64 index) {
+    m_index = index;
+
+    if (m_index > m_index_offset && m_index - m_index_offset >= 6) {
+        m_index_offset = m_index - 6;
+    }
+}
+
 } // namespace sphaira::ui

sphaira/source/ui/progress_box.cpp

@@ -119,7 +119,7 @@ auto ProgressBox::NewTransfer(const std::string& transfer)  -> ProgressBox& {
     return *this;
 }
 
-auto ProgressBox::UpdateTransfer(u64 offset, u64 size)  -> ProgressBox& {
+auto ProgressBox::UpdateTransfer(s64 offset, s64 size)  -> ProgressBox& {
     mutexLock(&m_mutex);
     m_size = size;
     m_offset = offset;

sphaira/source/ui/scrollbar.cpp

@@ -1,68 +0,0 @@
-#include "ui/scrollbar.hpp"
-#include "ui/nvg_util.hpp"
-
-namespace sphaira::ui {
-
-ScrollBar::ScrollBar(Vec4 bounds, float entry_height, std::size_t entries)
-    : m_bounds{bounds}
-    , m_entries{entries}
-    , m_entry_height{entry_height} {
-    Setup();
-}
-
-auto ScrollBar::OnLayoutChange() -> void {
-
-}
-
-auto ScrollBar::Draw(NVGcontext* vg, Theme* theme) -> void {
-    if (m_should_draw) {
-        gfx::drawRect(vg, m_pos, gfx::Colour::RED);
-    }
-}
-
-auto ScrollBar::Setup(Vec4 bounds, float entry_height, std::size_t entries) -> void {
-    m_bounds = bounds;
-    m_entry_height = entry_height;
-    m_entries = entries;
-    Setup();
-}
-
-auto ScrollBar::Setup() -> void {
-    m_bounds.y += 5.f;
-    m_bounds.h -= 10.f;
-
-    const float total_size = (m_entry_height) * static_cast<float>(m_entries);
-    if (total_size > m_bounds.h) {
-        m_step_size = total_size / m_entries;
-        m_pos.x = m_bounds.x;
-        m_pos.y = m_bounds.y;
-        m_pos.w = 2.f;
-        m_pos.h = total_size - m_bounds.h;
-        m_should_draw = true;
-        // LOG("total size: %.2f\n", total_size);
-        // LOG("step size: %.2f\n", m_step_size);
-        // LOG("pos y: %.2f\n", m_pos.y);
-        // LOG("pos h: %.2f\n", m_pos.h);
-    } else {
-        // LOG("not big enough for scroll total: %.2f bounds: %.2f\n", total_size, bounds.h);
-    }
-}
-
-auto ScrollBar::Move(Direction direction) -> void {
-    switch (direction) {
-        case Direction::DOWN:
-            if (m_index < (m_entries - 1)) {
-                m_index++;
-                m_pos.y += m_step_size;
-            }
-            break;
-        case Direction::UP:
-            if (m_index != 0) {
-                m_index--;
-                m_pos.y -= m_step_size;
-            }
-            break;
-    }
-}
-
-} // namespace sphaira::ui

sphaira/source/ui/sidebar.cpp

@@ -7,13 +7,12 @@
 namespace sphaira::ui {
 namespace {
 
-struct SidebarSpacer : SidebarEntryBase {
-
-};
-
-struct SidebarHeader : SidebarEntryBase {
-
+auto DistanceBetweenY(Vec4 va, Vec4 vb) -> Vec4 {
+    return Vec4{
+        va.x, va.y,
+        va.w, vb.y - va.y
     };
+}
 
 } // namespace
 
@@ -127,7 +126,7 @@ SidebarEntryArray::SidebarEntryArray(std::string title, Items items, Callback cb
     }
 }
 
-SidebarEntryArray::SidebarEntryArray(std::string title, Items items, Callback cb, std::size_t index)
+SidebarEntryArray::SidebarEntryArray(std::string title, Items items, Callback cb, s64 index)
 : SidebarEntryBase{std::forward<std::string>(title)}
 , m_items{std::move(items)}
 , m_callback{cb}
@@ -191,24 +190,12 @@ Sidebar::Sidebar(std::string title, std::string sub, Side side, Items&& items)
     m_title_pos = Vec2{m_pos.x + 30.f, m_pos.y + 40.f};
     m_base_pos = Vec4{GetX() + 30.f, GetY() + 170.f, m_pos.w - (30.f * 2.f), 70.f};
 
-    // each item has it's own Action, but we take over B
-    SetAction(Button::B, Action{"Back"_i18n, [this](){
-        SetPop();
-    }});
+    // set button positions
+    SetUiButtonPos({m_pos.x + m_pos.w - 60.f, 675});
 
-    m_selected_y = m_base_pos.y;
-
-    if (!m_items.empty()) {
-        // setup positions
-        m_selected_y = m_base_pos.y;
-        // for (auto&p : m_items) {
-        //     p->SetPos(m_base_pos);
-        //     m_base_pos.y += m_base_pos.h;
-        // }
-
-        // // give focus to first entry.
-        // m_items[m_index]->OnFocusGained();
-    }
+    const Vec4 pos = DistanceBetweenY(m_top_bar, m_bottom_bar);
+    m_list = std::make_unique<List>(1, 6, pos, m_base_pos);
+    m_list->SetScrollBarPos(GetX() + GetW() - 20, m_base_pos.y - 10, pos.h - m_base_pos.y + 48);
 }
 
 Sidebar::Sidebar(std::string title, std::string sub, Side side)
@@ -217,46 +204,21 @@ Sidebar::Sidebar(std::string title, std::string sub, Side side)
 
 
 auto Sidebar::Update(Controller* controller, TouchInfo* touch) -> void {
-    m_items[m_index]->Update(controller, touch);
     Widget::Update(controller, touch);
 
+    // if touched out of bounds, pop the sidebar and all widgets below it.
+    if (touch->is_clicked && !touch->in_range(GetPos())) {
+        App::PopToMenu();
+    } else {
+        m_list->OnUpdate(controller, touch, m_items.size(), [this](auto i) {
+            SetIndex(i);
+            FireAction(Button::A);
+        });
+    }
+
     if (m_items[m_index]->ShouldPop()) {
         SetPop();
     }
-
-    const auto old_index = m_index;
-    if (controller->GotDown(Button::ANY_DOWN) && m_index < (m_items.size() - 1)) {
-        m_index++;
-        m_selected_y += m_box_size.y;
-    } else if (controller->GotDown(Button::ANY_UP) && m_index != 0) {
-        m_index--;
-        m_selected_y -= m_box_size.y;
-    }
-
-    // if we moved
-    if (m_index != old_index) {
-        App::PlaySoundEffect(SoundEffect_Scroll);
-        m_items[old_index]->OnFocusLost();
-        m_items[m_index]->OnFocusGained();
-
-        // move offset
-        if ((m_selected_y + m_box_size.y) >= m_bottom_bar.y) {
-            m_selected_y -= m_box_size.y;
-            m_index_offset++;
-            // LOG("move down\n");
-        } else if (m_selected_y <= m_top_bar.y) {
-            // LOG("move up sely %.2f top %.2f\n", m_selected_y, m_top_bar.y);
-            m_selected_y += m_box_size.y;
-            m_index_offset--;
-        }
-    }
-}
-
-auto DistanceBetweenY(Vec4 va, Vec4 vb) -> Vec4 {
-    return Vec4{
-        va.x, va.y,
-        va.w, vb.y - va.y
-    };
 }
 
 auto Sidebar::Draw(NVGcontext* vg, Theme* theme) -> void {
@@ -268,26 +230,13 @@ auto Sidebar::Draw(NVGcontext* vg, Theme* theme) -> void {
     gfx::drawRect(vg, m_top_bar, theme->elements[ThemeEntryID_TEXT].colour);
     gfx::drawRect(vg, m_bottom_bar, theme->elements[ThemeEntryID_TEXT].colour);
 
-    const auto dist = DistanceBetweenY(m_top_bar, m_bottom_bar);
-    nvgSave(vg);
-    nvgScissor(vg, dist.x, dist.y, dist.w, dist.h);
+    Widget::Draw(vg, theme);
 
-    // for (std::size_t i = m_index_offset; i < m_items.size(); ++i) {
-    //     m_items[i]->Draw(vg, theme);
-    // }
-
-    for (auto&p : m_items) {
-        p->Draw(vg, theme);
-    }
-
-    nvgRestore(vg);
-
-    // draw the buttons. fetch the actions from current item and insert into array.
-    Actions draw_actions{m_actions};
-    const auto& actions_ref = m_items[m_index]->GetActions();
-    draw_actions.insert(actions_ref.cbegin(), actions_ref.cend());
-
-    gfx::drawButtons(vg, draw_actions, theme->elements[ThemeEntryID_TEXT].colour, m_pos.x + m_pos.w - 60.f);
+    m_list->Draw(vg, theme, m_items.size(), [this](auto* vg, auto* theme, auto v, auto i) {
+        const auto& [x, y, w, h] = v;
+        m_items[i]->SetY(y);
+        m_items[i]->Draw(vg, theme);
+    });
 }
 
 auto Sidebar::OnFocusGained() noexcept -> void {
@@ -303,23 +252,56 @@ auto Sidebar::OnFocusLost() noexcept -> void {
 void Sidebar::Add(std::shared_ptr<SidebarEntryBase> entry) {
     m_items.emplace_back(entry);
     m_items.back()->SetPos(m_base_pos);
-    m_base_pos.y += m_base_pos.h;
-
-    // for (auto&p : m_items) {
-    //     p->SetPos(base_pos);
-    //     m_base_pos.y += m_base_pos.h;
-    // }
 
     // give focus to first entry.
+    if (m_items.size() == 1) {
         m_items[m_index]->OnFocusGained();
+        SetupButtons();
+    }
 }
 
-void Sidebar::AddSpacer() {
+void Sidebar::SetIndex(s64 index) {
+    // if we moved
+    if (m_index != index) {
+        m_items[m_index]->OnFocusLost();
+        m_index = index;
+        m_items[m_index]->OnFocusGained();
 
+        if (m_index > m_index_offset && m_index - m_index_offset >= 5) {
+            m_index_offset = m_index - 5;
         }
 
-void Sidebar::AddHeader(std::string name) {
+        SetupButtons();
+    }
+}
 
+void Sidebar::SetupButtons() {
+    RemoveActions();
+
+    // add entry actions
+    for (const auto& [button, action] :  m_items[m_index]->GetActions()) {
+        SetAction(button, action);
+    }
+
+    // add default actions, overriding if needed.
+    this->SetActions(
+        std::make_pair(Button::DOWN, Action{[this](){
+            auto index = m_index;
+            if (m_list->ScrollDown(index, 1, m_items.size())) {
+                SetIndex(index);
+            }
+        }}),
+        std::make_pair(Button::UP, Action{[this](){
+            auto index = m_index;
+            if (m_list->ScrollUp(index, 1, m_items.size())) {
+                SetIndex(index);
+            }
+        }}),
+        // each item has it's own Action, but we take over B
+        std::make_pair(Button::B, Action{"Back"_i18n, [this](){
+            SetPop();
+        }})
+    );
 }
 
 } // namespace sphaira::ui

sphaira/source/ui/widget.cpp

@@ -1,9 +1,22 @@
 #include "ui/widget.hpp"
 #include "ui/nvg_util.hpp"
 #include "app.hpp"
+#include "log.hpp"
 
 namespace sphaira::ui {
 
+auto uiButton::Draw(NVGcontext* vg, Theme* theme) -> void {
+    // enable to see button region
+    // gfx::drawRect(vg, m_pos, gfx::Colour::RED);
+
+    nvgTextAlign(vg, NVG_ALIGN_RIGHT | NVG_ALIGN_TOP);
+    nvgFillColor(vg, theme->elements[ThemeEntryID_TEXT].colour);
+    nvgFontSize(vg, 20);
+    nvgText(vg, m_hint_pos.x, m_hint_pos.y, m_action.m_hint.c_str(), nullptr);
+    nvgFontSize(vg, 26);
+    nvgText(vg, m_button_pos.x, m_button_pos.y, gfx::getButton(m_button), nullptr);
+}
+
 void Widget::Update(Controller* controller, TouchInfo* touch) {
     for (const auto& [button, action] : m_actions) {
         if ((action.m_type & ActionType::DOWN) && controller->GotDown(button)) {
@@ -11,28 +24,36 @@ void Widget::Update(Controller* controller, TouchInfo* touch) {
                 App::PlaySoundEffect(SoundEffect_Focus);
             }
             action.Invoke(true);
+            break;
         }
         else if ((action.m_type & ActionType::UP) && controller->GotUp(button)) {
             action.Invoke(false);
+            break;
         }
         else if ((action.m_type & ActionType::HELD) && controller->GotHeld(button)) {
             action.Invoke(true);
+            break;
+        }
+    }
+
+    auto draw_actions = GetUiButtons();
+    for (auto& e : draw_actions) {
+        if (touch->is_clicked && touch->in_range(e.GetPos())) {
+            log_write("got click: %s\n", e.m_action.m_hint.c_str());
+            FireAction(e.m_button);
+            break;
         }
     }
 }
 
 void Widget::Draw(NVGcontext* vg, Theme* theme) {
-    Actions draw_actions;
+    auto draw_actions = GetUiButtons();
 
-    for (const auto& [button, action] : m_actions) {
-        if (!action.IsHidden()) {
-            draw_actions.emplace(button, action);
+    for (auto& e : draw_actions) {
+        e.Draw(vg, theme);
     }
 }
 
-    gfx::drawButtons(vg, draw_actions, theme->elements[ThemeEntryID_TEXT].colour);
-}
-
 auto Widget::HasAction(Button button) const -> bool {
     return m_actions.contains(button);
 }
@@ -47,4 +68,67 @@ void Widget::RemoveAction(Button button) {
     }
 }
 
+auto Widget::FireAction(Button b, u8 type) -> bool {
+    for (const auto& [button, action] : m_actions) {
+        if (button == b && (action.m_type & type)) {
+            App::PlaySoundEffect(SoundEffect_Focus);
+            action.Invoke(true);
+            return true;
+        }
+    }
+    return false;
+}
+
+auto Widget::GetUiButtons() const -> uiButtons {
+    auto vg = App::GetVg();
+    auto [x, y] = m_button_pos;
+
+    uiButtons draw_actions;
+    draw_actions.reserve(m_actions.size());
+
+    // build array
+    for (const auto& [button, action] : m_actions) {
+        if (action.IsHidden() || action.m_hint.empty()) {
+            continue;
+        }
+
+        uiButton ui_button{button, action};
+
+        // swap
+        if (button == Button::R && draw_actions.size() && draw_actions.back().m_button == Button::L) {
+            const auto s = draw_actions.back();
+            draw_actions.back().m_button = button;
+            draw_actions.back().m_action = action;
+            draw_actions.emplace_back(s);
+        } else {
+            draw_actions.emplace_back(ui_button);
+        }
+    }
+
+    float bounds[4]{};
+    for (auto& e : draw_actions) {
+        nvgTextAlign(vg, NVG_ALIGN_RIGHT | NVG_ALIGN_TOP);
+
+        nvgFontSize(vg, 20.f);
+        nvgTextBounds(vg, x, y, e.m_action.m_hint.c_str(), nullptr, bounds);
+        auto len = bounds[2] - bounds[0];
+        e.m_hint_pos = {x, 675, len, 20};
+
+        x -= len + 8.f;
+        nvgFontSize(vg, 26.f);
+        nvgTextBounds(vg, x, y - 7.f, gfx::getButton(e.m_button), nullptr, bounds);
+        len = bounds[2] - bounds[0];
+        e.m_button_pos = {x, 675 - 4.f, len, 26};
+        x -= len + 34.f;
+
+        e.SetPos(e.m_button_pos);
+        e.SetX(e.GetX() - 40);
+        e.SetW(e.m_hint_pos.x - e.m_button_pos.x + len + 25);
+        e.SetY(e.GetY() - 18);
+        e.SetH(26 + 18 * 2);
+    }
+
+    return draw_actions;
+}
+
 } // namespace sphaira::ui