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bdk: lvgl: correct slider knob signal coordinates

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It should always point to the middle of the knob and not be variable with offset.
This commit is contained in:
CTCaer
2026-03-18 05:21:20 +02:00
parent f2c2a77bc4
commit e3334b9a85
2 changed files with 40 additions and 8 deletions
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16
bdk/libs/lvgl/lv_objx/lv_line.c
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@@ -1,3 +1,19 @@
/*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file lv_line.c
*

32
bdk/libs/lvgl/lv_objx/lv_slider.c
View File

@@ -1,3 +1,18 @@
/*
* Copyright (c) 2026 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file lv_slider.c
@@ -437,16 +452,17 @@ static lv_res_t lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * par
lv_indev_get_point(param, &p);
int16_t tmp = 0;
if(w > h) {
lv_coord_t knob_w = h;
p.x -= slider->coords.x1 + h / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t)((int32_t) p.x * (ext->bar.max_value - ext->bar.min_value + 1)) / (w - knob_w);
tmp += ext->bar.min_value;
lv_coord_t knob_w = h;
lv_coord_t offset = (ext->knob_in == 0) ? w : w - knob_w;
p.x -= slider->coords.x1 + ((ext->knob_in == 0) ? 0 : knob_w / 2);
tmp = ((int32_t)p.x * (ext->bar.max_value - ext->bar.min_value) + offset / 2) / offset;
} else {
lv_coord_t knob_h = w;
p.y -= slider->coords.y1 + w / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t)((int32_t) p.y * (ext->bar.max_value - ext->bar.min_value + 1)) / (h - knob_h);
tmp = ext->bar.max_value - tmp; /*Invert the value: smaller value means higher y*/
lv_coord_t knob_h = w;
lv_coord_t offset = (ext->knob_in == 0) ? h : h - knob_h;
p.y -= slider->coords.y1 + ((ext->knob_in == 0) ? 0 : knob_h / 2);
tmp = ((int32_t)p.y * (ext->bar.max_value - ext->bar.min_value) + offset / 2) / offset;
}
tmp += ext->bar.min_value;
if(tmp < ext->bar.min_value) tmp = ext->bar.min_value;
else if(tmp > ext->bar.max_value) tmp = ext->bar.max_value;