Merge pull request #16 from spytheman/reduce_leaks

reduce some leaks, render at most 1 update per frame (it makes showcase.v responsive on linux for a slower i3 CPU)

Author: mike-ward

animation.v

@@ -30,7 +30,7 @@ pub fn (mut w Window) animation_add(mut animation Animation) {
 	w.animations << animation
 }
 
-fn (mut w Window) animaton_loop() {
+fn (mut w Window) animation_loop() {
 	for {
 		time.sleep(animation_cycle)
 		w.lock()

event_handlers.v

@@ -102,7 +102,8 @@ fn mouse_down_handler(node &Layout, in_handler bool, mut e Event, mut w Window)
 			return
 		}
 	}
-	for child in node.children.reverse() {
+	for i := node.children.len - 1; node.children.len > 0 && i >= 0; i-- {
+		child := unsafe { &node.children[i] }
 		mouse_down_handler(child, true, mut e, mut w)
 		if e.is_handled {
 			return
@@ -141,7 +142,8 @@ fn mouse_move_handler(node &Layout, mut e Event, mut w Window) {
 	if !w.pointer_over_app(e) {
 		return
 	}
-	for child in node.children.reverse() {
+	for i := node.children.len - 1; node.children.len > 0 && i >= 0; i-- {
+		child := unsafe { &node.children[i] }
 		mouse_move_handler(child, mut e, mut w)
 		if e.is_handled {
 			return
@@ -165,7 +167,8 @@ fn mouse_up_handler(node &Layout, mut e Event, mut w Window) {
 		w.view_state.mouse_lock.mouse_up(node, mut e, mut w)
 		return
 	}
-	for child in node.children.reverse() {
+	for i := node.children.len - 1; node.children.len > 0 && i >= 0; i-- {
+		child := unsafe { &node.children[i] }
 		mouse_up_handler(child, mut e, mut w)
 		if e.is_handled {
 			return
@@ -197,7 +200,8 @@ fn mouse_up_handler(node &Layout, mut e Event, mut w Window) {
 }
 
 fn mouse_scroll_handler(node &Layout, mut e Event, mut w Window) {
-	for child in node.children.reverse() {
+	for i := node.children.len - 1; node.children.len > 0 && i >= 0; i-- {
+		child := unsafe { &node.children[i] }
 		mouse_scroll_handler(child, mut e, mut w)
 		if e.is_handled {
 			return