only reset div elements to default if new element

src/main.c3

@@ -3,6 +3,25 @@ import vtree;
 import cache;
 import ugui;
 import rl;
+import std::time;
+import std::collections::ringbuffer;
+
+def Times = ringbuffer::RingBuffer(<time::NanoDuration, 128>);
+
+fn void Times.print_stats(&times)
+{
+	time::NanoDuration min, max, avg, x;
+	min = times.get(0);
+	for (usz i = 0; i < times.written; i++) {
+		x = times.get(i);
+		if (x < min) { min = x; }
+		if (x > max) { max = x; }
+		avg += x;
+	}
+	avg = (NanoDuration)((ulong)avg/128.0);
+
+	io::printfn("min=%s, max=%s, avg=%s", min, max, avg);
+}
 
 fn int main(String[] args)
 {
@@ -18,12 +37,14 @@ fn int main(String[] args)
 	rl::enable_event_waiting();
 
 	isz frame;
+	bool toggle = true;
+	time::Clock clock;
+	Times ui_times;
+	Times draw_times;
 
 	// Main loop
 	while (!rl::window_should_close()) {
-		const int PARTIAL_INPUT  = 0;
-		const int PARTIAL_LAYOUT = 1;
-		const int PARTIAL_DRAW   = 2;
+		clock.mark();
 		
 		/* Start Input Handling */
 		if (rl::is_window_resized()) {
@@ -47,29 +68,33 @@ fn int main(String[] args)
 		/* Start UI Handling */
 		ui.frame_begin()!!;
 
-/*
 		// main div, fill the whole window
 		ui.div_begin("main", ugui::Rect{.w=ui.width/2})!!;
 		{|
+
 			ui.layout_set_row()!!;
 			if (ui.button("button0", ugui::Rect{0,0,30,30})!!.mouse_press) {
 				io::printn("press button0");
+				toggle = !toggle;
+				ui.force_update()!!;
 			}
 			//ui.layout_next_column()!!;
 			if (ui.button("button1", ugui::Rect{0,0,30,30})!!.mouse_press) {
 				io::printn("press button1");
 			}
 			//ui.layout_next_column()!!;
+			if (toggle) {
 				if (ui.button("button2", ugui::Rect{0,0,30,30})!!.mouse_release) {
 					io::printn("release button2");
 				}
+			}
 			if (ui.slider_ver("slider", ugui::Rect{0,0,30,100})!!.update) {
 				ugui::Elem* e = ui.get_elem_by_label("slider")!!;
 				io::printfn("slider: %f", e.slider.value);
 			}
 		|};
 		ui.div_end()!!;
-*/
+
 		ui.div_begin("second", ugui::DIV_FILL)!!;
 		ugui::Elem* de = ui.get_elem_by_label("second")!!;
 		de.div.scroll.can_y = true;
@@ -92,6 +117,8 @@ fn int main(String[] args)
 
 		ui.frame_end()!!;
 		/* End UI Handling */
+		ui_times.push(clock.mark());
+		ui_times.print_stats();
 
 		/* Start UI Drawing */
 		rl::begin_drawing();
@@ -118,8 +145,11 @@ fn int main(String[] args)
 				io::printfn("Unknown cmd type: %d", cmd.type);
 			}
 		}
-
+		draw_times.push(clock.mark());
+		draw_times.print_stats();
 		rl::end_drawing();
+		/* End Drawing */
+
 	}
 
 	rl::close_window();

src/ugui_div.c3

@@ -20,17 +20,6 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size)
 		c_elem.bounds = ctx.position_element(parent, size);
 		if (c_elem.flags.is_new) {
 			c_elem.div.children_bounds = c_elem.bounds;
-		}
-
-		// 3. Mark the element as updated
-		c_elem.flags.updated = true;
-		// 4. Fill the div fields
-		c_elem.div.layout   = parent.div.layout;
-		c_elem.div.origin_c = Point{
-		    .x = c_elem.bounds.x,
-		    .y = c_elem.bounds.y,
-		};
-		c_elem.div.origin_r = c_elem.div.origin_c;
 			c_elem.div.color_bg = uint_to_rgba(0xff0000ff);
 			c_elem.div.scroll.can_x = false;
 			c_elem.div.scroll.can_y = false;
@@ -38,6 +27,17 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size)
 			c_elem.div.scroll.value_y = 0;
 		}
 
+		// 3. Mark the element as updated
+		c_elem.flags.updated = true;
+		// 4. Fill the div fields
+		c_elem.div.origin_c = Point{
+		    .x = c_elem.bounds.x,
+		    .y = c_elem.bounds.y,
+		};
+		c_elem.div.origin_r = c_elem.div.origin_c;
+		c_elem.div.layout   = parent.div.layout;
+	}
+
 	// Add the background to the draw stack
 	Cmd cmd = {
 		.type = CMD_RECT,

src/ugui_impl.c3

@@ -42,7 +42,6 @@ fn void! Ctx.init(&ctx)
 {
 	ctx.tree.init(MAX_ELEMENTS)!;
 	defer catch { (void)ctx.tree.free(); }
-	//ug_fifo_init(&ctx.fifo, MAX_CMDS);
 
 	ctx.cache.init()!;
 	defer catch { (void)ctx.cache.free(); }
@@ -72,7 +71,8 @@ fn void! Ctx.frame_begin(&ctx)
 	// The root should have the updated flag only if the size of the window
 	// was changed between frames, this propagates an element size recalculation
 	// down the element tree
-	c_elem.flags.updated = ctx.input.events.resize;
+	c_elem.flags.updated = ctx.input.events.resize | ctx.input.events.force_update;
+	ctx.input.events.force_update = false;
 	// 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
@@ -106,13 +106,20 @@ fn void! Ctx.frame_begin(&ctx)
 	// TODO: add a background color taken from a theme or config
 }
 
+fn void! Ctx.force_update(&ctx)
+{
+	ctx.input.events.force_update = true;
+}
+
 fn void! Ctx.frame_end(&ctx)
 {
 	// 1. clear the tree
 	ctx.tree.prune(0)!;
 
 	// 2. clear input fields
+	bool f = ctx.input.events.force_update;
 	ctx.input.events = (InputEvents)0;
+	ctx.input.events.force_update = f;
 
 	// draw mouse position
 $if 1:
@@ -130,9 +137,9 @@ $if 1:
 $endif
 }
 
-/**
+<*
  * @ensure elem != null
-**/
+ *>
 fn bool Ctx.is_hovered(&ctx, Elem *elem)
 {
 	return point_in_rect(ctx.input.mouse.pos, elem.bounds);

src/ugui_input.c3

@@ -8,6 +8,7 @@ bitstruct InputEvents : uint {
 	bool change_focus : 1; // window focus changed
 	bool mouse_move : 2; // mouse was moved
 	bool mouse_btn : 3; // mouse button pressed or released
+	bool force_update : 4;
 }
 
 // Window size was changed