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track focused and hovered elements

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This commit is contained in:
Alessandro Mauri 2024-12-20 01:45:10 +01:00
parent 4bd827ce5c
commit f7985f8c7f
6 changed files with 58 additions and 56 deletions
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55
src/ugui_core.c3
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@ -32,8 +32,7 @@ enum ElemType {
bitstruct ElemFlags : uint {
bool updated : 0;
bool has_focus : 1;
bool is_new : 2;
bool is_new : 1;
}
bitstruct ElemEvents : uint {
@ -134,6 +133,9 @@ struct Ctx {
}
}
Id hover_id;
Id focus_id;
Rect div_scissor; // the current div bounds used for scissor test
isz active_div; // tree node indicating the current active div
}
@ -195,13 +197,15 @@ macro Ctx.get_elem(&ctx, Id id)
return elem;
}
// FIXME: Since ids are now keyed with the element's parent id, this function does not work
// outside of the element's div block.
// this searches an element in the cache by label, it does not create a new element
// if it does't find one
macro Ctx.get_elem_by_label(&ctx, String label)
{
Id id = label.hash();
return ctx.cache.search(id);
}
//macro Ctx.get_elem_by_label(&ctx, String label)
//{
// Id id = ctx.get_id(label);
// return ctx.cache.search(id);
//}
macro Ctx.get_elem_by_tree_idx(&ctx, isz idx) @private
{
@ -252,7 +256,7 @@ fn void! Ctx.frame_begin(&ctx)
// if the window has focus then the root element also has focus, no other
// computation needed, child elements need to check the mouse positon and
// other stuff
elem.flags.has_focus = ctx.has_focus;
//elem.flags.has_focus = ctx.has_focus;
Elem def_root = {
.id = ROOT_ID,
@ -317,8 +321,39 @@ $endif
<*
* @ensure elem != null
*>
fn bool Ctx.is_hovered(&ctx, Elem *elem)
*>
macro bool Ctx.is_hovered(&ctx, Elem *elem)
{
return point_in_rect(ctx.input.mouse.pos, elem.bounds);
}
macro bool Ctx.elem_focus(&ctx, Elem *elem)
{
return ctx.focus_id == elem.id;
}
// TODO: add other events
// FIXME: this does not work with touch
macro ElemEvents Ctx.get_elem_events(&ctx, Elem *elem)
{
//io::printfn("id %x, focus id %x", elem.id, ctx.focus_id);
bool hover = ctx.is_hovered(elem);
bool focus = ctx.focus_id == elem.id || (hover && ctx.is_mouse_pressed(BTN_LEFT));
if (hover) {
ctx.hover_id = elem.id;
}
if (focus) {
ctx.focus_id = elem.id;
}
ElemEvents ev = {
.mouse_hover = hover,
.mouse_press = hover && focus && ctx.is_mouse_pressed(BTN_ANY),
.mouse_release = hover && focus && ctx.is_mouse_released(BTN_ANY),
.mouse_hold = hover && focus && ctx.is_mouse_down(BTN_ANY),
};
return ev;
}