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UI_Scalable_Group :: struct {
#as using base_parent : UI_Parent = .{type = .SCALABLE_GROUP};
Scale_Params :: struct {
// using metrics : struct {
x1, y1, x2, y2 : s32;
#place x1; v1 : ivec2;
#place x2; v2 : ivec2;
// };
scale_mode : enum u8 {
ANCHOR_TL :: 0; // v1 - size, v2 - offset from corner (both positive)
ANCHOR_TR :: 1;
ANCHOR_BL :: 2;
ANCHOR_BR :: 3;
STRETCH_T :: 4; // x1/2 - left/right offset, y1 - top offset, y2 - height
STRETCH_B :: 5; // x1/2 - left/right offset, y1 - bottom offset, y2 - height
STRETCH_L :: 6; // y1/2 - top/bottom offset, x1 - left offset, x2 - width
STRETCH_R :: 7; // y1/2 - top/bottom offset, x1 - right offset, x2 - width
STRETCH_C :: 8; // v1 - top-left offset, v2 - bottom-right offset
CENTERIZE :: 9; // v1 - size, v2 - offset from center(signed)
FIT_EXACT :: 10; //TODO
FIT_ROUGH :: 11;
} = .ANCHOR_TL;
}
Element :: struct {
ptr : *UI_Elem;
scale_params : Scale_Params;
}
elements : []Element;
}
get_zone :: (using zone : Ibox2, using scale_params : UI_Scalable_Group.Scale_Params) -> Ibox2 {
if scale_mode == {
case .ANCHOR_TL; return .{corner = corner + v2, size = v1};
case .ANCHOR_TR; return .{corner = .{left + width - x2 - x1, top + y2}, size = v1};
case .ANCHOR_BL; return .{corner = .{left + x2, top + height - y2 - y1}, size = v1};
case .ANCHOR_BR; return .{corner = .{left + width - x2 - x1, top + height - y2 - y1}, size = v1};
case .STRETCH_T; return .{corner = .{left + x1, top + y1}, size = .{width - x1 - x2, y2}};
case .STRETCH_B; return .{corner = .{left + x1, top + height - y1 - y2}, size = .{width - x1 - x2, y2}};
case .STRETCH_L; return .{corner = .{left + x1, top + y1}, size = .{x2, height - y1 - y2}};
case .STRETCH_R; return .{corner = .{left + width - x1 - x2, top + y1}, size = .{x2, height - y1 - y2}};
case .STRETCH_C; return .{corner = corner + v1, size = size - v1 - v2};
case .CENTERIZE; return .{corner = corner + (size - v1) / 2 + v2 , size = v1};
}
assert(false);
return .{};
}
set_sub_elements :: (group : *UI_Scalable_Group, elements : ..UI_Scalable_Group.Element) {
group.elements = elements;
for e : elements {
e.ptr.parent = group;
}
}
c_draw_scalable_group :: (canvas : *Canvas, ui_elem : *UI_Elem, zone : Ibox2, style : *UI_Style) -> bool {
using cast(*UI_Scalable_Group) ui_elem;
for e : elements {
e_zone := get_zone(zone, e.scale_params);
if !inside(e_zone, zone) return false;
if !c_draw(canvas, e.ptr, e_zone, style) return false;
}
return true;
}
handle_key_scalable_group :: (ui_elem : *UI_Elem, key : Key) -> handled:bool {
using cast(*UI_Scalable_Group) ui_elem;
assert(cursor_state == .ON || cursor_state == .OUTSIDE);
handled := false;
if cursor_state == .OUTSIDE {
assert(xx active_element);
{
ok := false;
for e : elements if e.ptr == active_element ok = true;
assert(ok);
}
handled = handle_key(active_element, key);
} else {
assert(xx !active_element);
}
return handled;
}
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