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ugui/src/ugui_slider.c3

67 lines
1.8 KiB

2 months ago
module ugui;
fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size)
{
Id id = hash(label);
Elem *parent = ctx.get_parent()!;
Elem *c_elem = ctx.get_elem(id)!;
// add it to the tree
ctx.tree.add(id, ctx.active_div)!;
// 1. Fill the element fields
c_elem.type = ETYPE_SLIDER;
// if the element is new or the parent was updated then redo layout
if (c_elem.flags.is_new || parent.flags.updated) {
// 2. Layout
c_elem.rect = ctx.position_element(parent, size, true);
/* handle
* +----+-----+---------------------+
* | |#####| |
* +----+-----+---------------------+
*/
c_elem.slider.handle = Rect{
.x = (short)(c_elem.rect.x + (int)(c_elem.rect.w * c_elem.slider.value)),
.y = c_elem.rect.y,
.w = (short)(c_elem.rect.w * 0.25),
.h = c_elem.rect.h,
};
}
c_elem.events = ctx.get_elem_events(c_elem);
if (parent.flags.has_focus && c_elem.events.mouse_hover) {
if (point_in_rect(ctx.input.mouse.pos, c_elem.slider.handle) && c_elem.events.mouse_hold) {
short x = (short)clamp(ctx.input.mouse.pos.x - c_elem.slider.handle.w/2, c_elem.rect.x, c_elem.rect.x + c_elem.rect.w - c_elem.slider.handle.w);
float v = (float)(c_elem.slider.handle.x-c_elem.rect.x) / (float)(c_elem.rect.w-c_elem.slider.handle.w);
c_elem.slider.handle.x = x;
c_elem.slider.value = v;
c_elem.events.update = true;
}
}
// Draw the button
Color bg_color = uint_to_rgba(0x0000ffff);
Color handle_color = uint_to_rgba(0x0ff000ff);
Cmd cmd = {
.type = CMD_RECT,
.rect = {
.rect = c_elem.rect,
.color = bg_color,
},
};
ctx.cmd_queue.enqueue(&cmd)!;
cmd = Cmd{
.type = CMD_RECT,
.rect = {
.rect = c_elem.slider.handle,
.color = handle_color,
},
};
ctx.cmd_queue.enqueue(&cmd)!;
return c_elem.events;
}