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semi-working vertical slider

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This commit is contained in:
Alessandro Mauri 2024-11-17 21:36:46 +01:00
parent 763e9ba8d6
commit 73bc933eb5
7 changed files with 188 additions and 87 deletions
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57
src/ugui_layout.c3
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@ -78,17 +78,22 @@ fn void! Ctx.layout_next_column(&ctx)
// parent: parent div
// rect: the requested size
// style: apply style
<*
@require ctx != null
@require parent.type == ETYPE_DIV
*>
fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
{
Rect placement;
Point origin;
Div* div = &parent.div;
// 1. Select the right origin
switch (parent.div.layout) {
switch (div.layout) {
case LAYOUT_ROW:
origin = parent.div.origin_r;
origin = div.origin_r;
case LAYOUT_COLUMN:
origin = parent.div.origin_c;
origin = div.origin_c;
case LAYOUT_FLOATING: // none
default:
// Error
@ -100,8 +105,8 @@ fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
// 2. Calculate the placement
placement.x = (short)max(origin.x + rect.x, 0);
placement.y = (short)max(origin.y + rect.y, 0);
placement.w = rect.w > 0 ? rect.w : parent.bounds.w - (placement.x - parent.bounds.x);
placement.h = rect.h > 0 ? rect.h : parent.bounds.h - (placement.y - parent.bounds.y);
placement.w = rect.w > 0 ? rect.w : (short)max(parent.bounds.w - (placement.x - parent.bounds.x), 0);
placement.h = rect.h > 0 ? rect.h : (short)max(parent.bounds.h - (placement.y - parent.bounds.y), 0);
pl_corner.x = placement.x + placement.w;
pl_corner.y = placement.y + placement.h;
@ -122,28 +127,23 @@ fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
}
// 3. Update the origins of the parent
parent.div.origin_r = Point{
div.origin_r = Point{
.x = pl_corner.x,
.y = origin.y,
};
parent.div.origin_c = Point{
div.origin_c = Point{
.x = origin.x,
.y = pl_corner.y,
};
// 4. Calculate the "scrolled" view
Point off;
if (parent.div.can_scroll_x && parent.div.horizontal_scroll_bar != -1) {
Elem*! sx = ctx.get_elem_by_tree_idx(parent.div.horizontal_scroll_bar);
if (catch sx) { return Rect{}; }
// TODO: assert that the element is a slider
off.x = (short)(parent.div.children_bounds.w * sx.slider.value);
Rect* cb = &div.children_bounds;
if (div.scroll.can_x && div.scroll.on_x) {
off.x = (short)(cb.w * div.scroll.value_x);
}
if (parent.div.can_scroll_y && parent.div.vertical_scroll_bar != -1) {
Elem*! sy = ctx.get_elem_by_tree_idx(parent.div.vertical_scroll_bar);
if (catch sy) { return Rect{}; }
// TODO: assert that the element is a slider
off.y = (short)(parent.div.children_bounds.h * sy.slider.value);
if (div.scroll.can_y && div.scroll.on_y) {
off.y = (short)((float)(cb.h - parent.bounds.h) * div.scroll.value_y);
}
Rect view = {
.x = parent.bounds.x + off.x,
@ -152,7 +152,26 @@ fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
.h = parent.bounds.h,
};
// TODO: 5. check if the placement is inside the view
// 5. check if the placement overflows the children ounds, if so update them
if (!point_in_rect(pl_corner, *cb)) {
if (pl_corner.y > cb.y+cb.h) {
cb.h = pl_corner.y - cb.y;
}
if (pl_corner.x > cb.x+cb.w) {
cb.w += pl_corner.x - (cb.x + cb.w);
}
}
return placement;
// 6. check if the placement is inside the view
if (rect_collision(placement, view)) {
return Rect{
.x = placement.x - off.x,
.y = placement.y - off.y,
.w = placement.w,
.h = placement.h,
};
} else {
return Rect{};
}
}