1 files changed, 88 insertions, 0 deletions
diff --git a/kscurses/ui/scalable_group.jai b/kscurses/ui/scalable_group.jai
new file mode 100644
index 0000000..6c12bcc
--- /dev/null
+++ b/kscurses/ui/scalable_group.jai
@@ -0,0 +1,88 @@
+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;
+}
+\ No newline at end of file