[signal] add Signal0

src/main/haxework/signal/Signal.hx

@@ -23,6 +23,17 @@ class BaseSignal<R> {
     }
 }
 
+typedef Receiver0 = Void -> Void;
+
+class Signal0 extends BaseSignal<Receiver0> {
+
+    public function emit():Void {
+        for (receiver in receivers) {
+            receiver();
+        }
+    }
+}
+
 typedef Receiver1<A> = A -> Void;
 
 class Signal1<A> extends BaseSignal<Receiver1<A>> {

src/main/haxework/view/skin/Skin.hx

@@ -1,5 +1,6 @@
 package haxework.view.skin;
 
+import haxework.view.utils.DrawUtil.FillType;
 import haxework.view.layout.ILayout;
 import haxework.view.core.Geometry;
 import flash.display.BitmapData;
@@ -10,8 +11,8 @@ class Skin {
         return new GeometrySkin(new Geometry().setSize(width, height));
     }
 
-    public static function bitmap(image:BitmapData):ISkin<SpriteView> {
-        return new BitmapSkin(image);
+    public static function bitmap(image:BitmapData, fillType:FillType = null):ISkin<SpriteView> {
+        return new BitmapSkin(image, fillType);
     }
 
     public static function color(color:Int, alpha:Float = 1.0):ISkin<SpriteView> {
@@ -30,8 +31,8 @@ class Skin {
         return new ButtonColorSkin(color, alpha);
     }
 
-    public static function buttonBitmap(image:BitmapData):ISkin<ButtonView> {
-        return new ButtonBitmapSkin(image);
+    public static function buttonBitmap(image:BitmapData, fillType:FillType = null):ISkin<ButtonView> {
+        return new ButtonBitmapSkin(image, fillType);
     }
 
     public static function tabColor(color:Int, alpha:Float = 1.0):ISkin<ButtonView> {