added loader sample

samples/01-view/src/ViewExample.hx

@@ -0,0 +1,24 @@
+package;
+
+import haxework.gui.ViewBuilder;
+import haxework.gui.VGroupView;
+import haxework.gui.ButtonView;
+import haxework.gui.Root;
+
+@:template("form.json")
+class FormView extends VGroupView implements ViewBuilder {}
+
+class ViewExample {
+
+  public static function main() {
+    new ViewExample();
+  }
+
+  public function new() {
+    new Root(new FormView({listener:this}));
+  }
+
+  public function onPress(view:ButtonView):Void {
+    trace("onPress: " + view.id);
+  }
+}