[view] add back method to frame switcher

src/main/haxework/view/form/ButtonView.hx

@@ -18,6 +18,7 @@ class ButtonView extends LabelView {
     public var disabled(default, set):Bool;
     public var state(get, null):ButtonState;
     public var onPress(default, null):Signal<ButtonView>;
+    public var propagation(default, default):Bool;
 
     private var overed:Bool;
     private var downed:Bool;
@@ -26,6 +27,7 @@ class ButtonView extends LabelView {
         super();
         skin = new ButtonColorSkin();
         style = "button";
+        propagation = true;
         overed = false;
         downed = false;
         state = ButtonState.UP;
@@ -47,7 +49,7 @@ class ButtonView extends LabelView {
 
     private function onMouseClick(event:MouseEvent):Void {
         #if js if (downed) { #end
-        //event.stopImmediatePropagation();
+        if (!propagation) event.stopImmediatePropagation();
         if (!disabled) onPress.emit(this);
         #if js } #end
     }

src/main/haxework/view/frame/FrameSwitcher.hx

@@ -17,11 +17,13 @@ class FrameSwitcher extends GroupView {
     public var animateFactory(default, default):Class<IAnimate>;
 
     private var animate:IAnimate;
+    private var history:Array<{id:String, data:Dynamic}>;
 
     public function new() {
         super();
         factory = new Map();
         frames = new Map();
+        history = [];
         current = null;
     }
 
@@ -65,16 +67,23 @@ class FrameSwitcher extends GroupView {
         }
         animate = buildAnimate(current);
         if (animate != null && prev != null) {
-            animate.start(function(_) {
-                removePrev(prev);
-            });
+            animate.start(function(_) removePrev(prev));
         } else {
             removePrev(prev);
         }
+        history.push({id:current.frameId, data:data});
         onSwitch.emit(current);
         return cast current;
     }
 
+    public function back():Void {
+        if (history.length > 1) {
+            history.pop();
+            var item = history.pop();
+            change(item.id, item.data);
+        }
+    }
+
     private function removePrev(prev:Null<FrameView<Dynamic>>):Void {
         if (prev != null) {
             prev.onHide();