[gui] add DataView

src/main/haxework/gui/DataView.hx

@@ -0,0 +1,17 @@
+package haxework.gui;
+
+class DataView<D> extends GroupView {
+
+    public var data(default, set):Array<D>;
+    public var factory(default, default):Int -> D -> IView<Dynamic>;
+
+    private function set_data(value:Array<D>):Array<D> {
+        data = value;
+        rebuild();
+        return data;
+    }
+
+    private function rebuild():Void {
+        views = Lambda.array(Lambda.mapi(data, factory));
+    }
+}

src/main/haxework/gui/ScrollView.hx

@@ -57,7 +57,9 @@ class ScrollView extends HGroupView {
 
     private function set_position(value:Float):Float {
         position = Math.min(Math.max(0, value), 1 - (height / view.height));
-        scroll.position = position;
+        if (scroll != null) {
+            scroll.position = position;
+        }
         toUpdate();
         return position;
     }

src/main/haxework/gui/list/HScrollBarView.hx

@@ -4,12 +4,18 @@ import flash.geom.Point;
 
 class HScrollBarView extends ScrollBarView {
 
-  override private function onMouseDown(p:Point):Void {
-    mousePosition = p.x - width * position;
-  }
+    public function new() {
+        super();
+        geometry.size.percent.width = 100;
+        geometry.size.fixed.height = 10;
+    }
 
-  override private function onMouseMove(p:Point):Void {
-    position = (p.x - mousePosition) / width;
-    onScroll.emit(position);
-  }
+    override private function onMouseDown(p:Point):Void {
+        mousePosition = p.x - width * position;
+    }
+
+    override private function onMouseMove(p:Point):Void {
+        position = (p.x - mousePosition) / width;
+        onScroll.emit(position);
+    }
 }

src/main/haxework/gui/list/VScrollBarView.hx

@@ -4,12 +4,18 @@ import flash.geom.Point;
 
 class VScrollBarView extends ScrollBarView {
 
-  override private function onMouseDown(p:Point):Void {
-    mousePosition = p.y - height * position;
-  }
+    public function new() {
+        super();
+        geometry.size.percent.height = 100;
+        geometry.size.fixed.width = 10;
+    }
 
-  override private function onMouseMove(p:Point):Void {
-    position = (p.y - mousePosition) / height;
-    onScroll.emit(position);
-  }
+    override private function onMouseDown(p:Point):Void {
+        mousePosition = p.y - height * position;
+    }
+
+    override private function onMouseMove(p:Point):Void {
+        position = (p.y - mousePosition) / height;
+        onScroll.emit(position);
+    }
 }