Fix gesture events in fn2

This CL makes gesture events work again in fn2.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1146923005

examples/fn2/container.dart

@@ -38,12 +38,17 @@ class ContainerApp extends App {
                   ),
               ])),
       ]),
-      onPointerDown: _handlePointerDown);
+      onPointerDown: _handlePointerDown,
+      onGestureTap: _handleGestureTap);
   }
 
   void _handlePointerDown(sky.PointerEvent event) {
     print("_handlePointerDown");
   }
+
+  void _handleGestureTap(sky.GestureEvent event) {
+    print("_handleGestureTap");
+  }
 }
 
 void main() {

examples/game/lib/sprite_box.dart

@@ -41,7 +41,7 @@ class SpriteBox extends RenderBox {
     size = constraints.constrain(new Size.infinite());
   }
 
-  void handlePointer(PointerEvent event) {
+  void handleEvent(Event event) {
     switch (event.type) {
       case 'pointerdown':
         print("pointerdown");

examples/raw/ink_well.dart

@@ -41,7 +41,7 @@ class InkSplash {
 class InkWell extends RenderBox {
   final List<InkSplash> _splashes = new List<InkSplash>();
 
-  void handlePointer(sky.PointerEvent event) {
+  void handleEvent(sky.Event event) {
     switch (event.type) {
       case 'pointerdown':
         _splashes.add(new InkSplash(position: new sky.Point(event.x, event.y),

examples/raw/sector_layout.dart

@@ -482,7 +482,7 @@ class RenderSolidColor extends RenderDecoratedSector {
     deltaTheta = constraints.constrainDeltaTheta(desiredDeltaTheta);
   }
 
-  void handlePointer(sky.PointerEvent event) {
+  void handleEvent(sky.Event event) {
     if (event.type == 'pointerdown')
       decoration = new BoxDecoration(backgroundColor: const sky.Color(0xFFFF0000));
     else if (event.type == 'pointerup')

examples/raw/touch_demo.dart

@@ -42,7 +42,7 @@ class RenderTouchDemo extends RenderBox {
 
   RenderTouchDemo();
 
-  void handlePointer(PointerEvent event) {
+  void handleEvent(sky.Event event) {
     switch (event.type) {
       case 'pointerdown':
         int color = colors[event.pointer.remainder(colors.length)];

examples/stocks2/lib/stock_app.dart

@@ -164,7 +164,7 @@ class StocksApp extends App {
     return new ToolBar(
         left: new IconButton(
           icon: 'navigation/menu_white',
-          onGestureTap: (_) => _drawerController.toggle),
+          onGestureTap: _drawerController.toggle),
         center: new Text('Stocks'),
         right: [
           new IconButton(

sdk/lib/framework/app.dart

@@ -43,8 +43,21 @@ class AppView {
   }
 
   void _handleEvent(sky.Event event) {
-    if (event is sky.PointerEvent)
+    if (event is sky.PointerEvent) {
       _handlePointerEvent(event);
+    } else if (event is sky.GestureEvent) {
+      HitTestResult result = new HitTestResult();
+      _renderView.hitTest(result, position: new sky.Point(event.x, event.y));
+      dispatchEvent(event, result);
+    }
+  }
+
+  PointerState _createStateForPointer(sky.PointerEvent event, sky.Point position) {
+    HitTestResult result = new HitTestResult();
+    _renderView.hitTest(result, position: position);
+    PointerState state = new PointerState(result: result, lastPosition: position);
+    _stateForPointer[event.pointer] = state;
+    return state;
   }
 
   void _handlePointerEvent(sky.PointerEvent event) {
@@ -53,10 +66,7 @@ class AppView {
     PointerState state;
     switch(event.type) {
       case 'pointerdown':
-        HitTestResult result = new HitTestResult();
-        _renderView.hitTest(result, position: position);
-        state = new PointerState(result: result, lastPosition: position);
-        _stateForPointer[event.pointer] = state;
+        state = _createStateForPointer(event, position);
         break;
       case 'pointerup':
       case 'pointercancel':
@@ -66,22 +76,20 @@ class AppView {
       case 'pointermove':
         state = _stateForPointer[event.pointer];
         // In the case of mouse hover we won't already have a cached down.
-        if (state.result == null) {
-          state.result = new HitTestResult();
-          _renderView.hitTest(state.result, position: position);
-        }
+        if (state == null)
+          state = _createStateForPointer(event, position);
         break;
     }
     event.dx = position.x - state.lastPosition.x;
     event.dy = position.y - state.lastPosition.y;
     state.lastPosition = position;
 
-    dispatchPointerEvent(event, state.result);
+    dispatchEvent(event, state.result);
   }
 
-  void dispatchPointerEvent(sky.PointerEvent event, HitTestResult result) {
+  void dispatchEvent(sky.Event event, HitTestResult result) {
     assert(result != null);
     for (RenderNode node in result.path.reversed)
-      node.handlePointer(event);
+      node.handleEvent(event);
   }
 }

sdk/lib/framework/fn2.dart

@@ -915,8 +915,8 @@ class Container extends Component {
 class _AppView extends AppView {
   _AppView() : super(null);
 
-  void dispatchPointerEvent(sky.PointerEvent event, HitTestResult result) {
-    super.dispatchPointerEvent(event, result);
+  void dispatchEvent(sky.Event event, HitTestResult result) {
+    super.dispatchEvent(event, result);
 
     UINode target = RenderNodeWrapper._getMounted(result.path.first);
 

sdk/lib/framework/rendering/node.dart

@@ -180,13 +180,16 @@ abstract class RenderNode extends AbstractNode {
   void paint(RenderNodeDisplayList canvas) { }
 
 
-  // HIT TESTING
+  // EVENTS
 
-  void handlePointer(sky.PointerEvent event) {
+  void handleEvent(sky.Event event) {
     // override this if you have a client, to hand it to the client
-    // override this if you want to do anything with the pointer event
+    // override this if you want to do anything with the event
   }
 
+
+  // HIT TESTING
+
   // RenderNode subclasses are expected to have a method like the
   // following (with the signature being whatever passes for coordinates
   // for this particular class):

tests/raw/render_flex.dart

@@ -28,7 +28,7 @@ class RenderSolidColor extends RenderDecoratedBox {
     size = constraints.constrain(desiredSize);
   }
 
-  void handlePointer(sky.PointerEvent event) {
+  void handleEvent(sky.Event event) {
     if (event.type == 'pointerdown')
       decoration = new BoxDecoration(backgroundColor: const sky.Color(0xFFFF0000));
     else if (event.type == 'pointerup')