Use GestureDetector in the framework and examples

We're now using it at the widget layer for everything except scrolling and
flinging.

examples/demo_launcher/lib/main.dart

@@ -162,9 +162,9 @@ class DemoList extends Component {
   }
 
   Widget buildDemo(SkyDemo demo) {
-    return new Listener(
+    return new GestureDetector(
       key: demo.key,
-      onGestureTap: (_) => launch(demo.href, demo.bundle),
+      onTap: () => launch(demo.href, demo.bundle),
       child: new Container(
         height: kCardHeight,
         child: new Card(

examples/fitness/lib/feed.dart

@@ -39,11 +39,8 @@ class DialogMenuItem extends ButtonBase {
   }
 
   Widget buildContent() {
-    return new Listener(
-      onGestureTap: (_) {
-        if (onPressed != null)
-          onPressed();
-      },
+    return new GestureDetector(
+      onTap: onPressed,
       child: new Container(
         height: 48.0,
         child: new InkWell(

examples/fitness/lib/meal.dart

@@ -56,10 +56,9 @@ class MealFragment extends StatefulComponent {
 
   String _description = "";
 
-  EventDisposition _handleSave() {
+  void _handleSave() {
     onCreated(new Meal(when: new DateTime.now(), description: _description));
     navigator.pop();
-    return EventDisposition.processed;
   }
 
   Widget buildToolBar() {
@@ -69,8 +68,8 @@ class MealFragment extends StatefulComponent {
         onPressed: navigator.pop),
       center: new Text('New Meal'),
       right: [new InkWell(
-        child: new Listener(
-          onGestureTap: (_) => _handleSave(),
+        child: new GestureDetector(
+          onTap: _handleSave,
           child: new Text('SAVE')
         )
       )]

examples/fitness/lib/measurement.dart

@@ -119,7 +119,7 @@ class MeasurementFragment extends StatefulComponent {
   DateTime _when = new DateTime.now();
   String _errorMessage = null;
 
-  EventDisposition _handleSave() {
+  void _handleSave() {
     double parsedWeight;
     try {
       parsedWeight = double.parse(_weight);
@@ -128,11 +128,9 @@ class MeasurementFragment extends StatefulComponent {
       setState(() {
         _errorMessage = "Save failed";
       });
-      return EventDisposition.processed;
     }
     onCreated(new Measurement(when: _when, weight: parsedWeight));
     navigator.pop();
-    return EventDisposition.processed;
   }
 
   Widget buildToolBar() {
@@ -142,8 +140,8 @@ class MeasurementFragment extends StatefulComponent {
         onPressed: navigator.pop),
       center: new Text('New Measurement'),
       right: [new InkWell(
-        child: new Listener(
-          onGestureTap: (_) => _handleSave(),
+        child: new GestureDetector(
+          onTap: _handleSave,
           child: new Text('SAVE')
         )
       )]
@@ -158,7 +156,7 @@ class MeasurementFragment extends StatefulComponent {
 
   static final GlobalKey weightKey = new GlobalKey();
 
-  EventDisposition _handleDatePressed(_) {
+  void _handleDatePressed() {
     showDialog(navigator, (navigator) {
       return new MeasurementDateDialog(navigator: navigator, previousDate: _when);
     }).then((DateTime value) {
@@ -168,7 +166,6 @@ class MeasurementFragment extends StatefulComponent {
         _when = value;
       });
     });
-    return EventDisposition.processed;
   }
 
   Widget buildBody() {
@@ -179,8 +176,8 @@ class MeasurementFragment extends StatefulComponent {
       child: new Container(
         padding: const EdgeDims.all(20.0),
         child: new Column([
-          new Listener(
-            onGestureTap: _handleDatePressed,
+          new GestureDetector(
+            onTap: _handleDatePressed,
             child: new Container(
               height: 50.0,
               child: new Column([

examples/mine_digger/lib/main.dart

@@ -107,19 +107,19 @@ class MineDiggerApp extends App {
             state = cells[iy][ix] ? CellState.shown : state;
         }
         if (state == CellState.covered) {
-          row.add(new Listener(
-            onPointerDown: _pointerDownHandlerFor(ix, iy),
-            onGestureTap: (_) {
-              probe(ix, iy);
-            },
-            onGestureLongPress: (_) {
+          row.add(new GestureDetector(
+            onTap: () => probe(ix, iy),
+            onLongPress: () {
               activity.userFeedback.performHapticFeedback(activity.HapticFeedbackType_LONG_PRESS);
               flag(ix, iy);
             },
-            child: new CoveredMineNode(
-              flagged: false,
-              posX: ix,
-              posY: iy
+            child: new Listener(
+              onPointerDown: _pointerDownHandlerFor(ix, iy),
+              child: new CoveredMineNode(
+                flagged: false,
+                posX: ix,
+                posY: iy
+              )
             )
           ));
           // Mutating |hasCoveredCell| here is hacky, but convenient, same

examples/widgets/ensure_visible.dart

@@ -41,13 +41,11 @@ class EnsureVisibleApp extends App {
     super.initState();
   }
 
-  EventDisposition handleTap(Widget card, CardModel cardModel) {
+  void handleTap(Widget card, CardModel cardModel) {
     ensureWidgetIsVisible(card, duration: const Duration(milliseconds: 200))
     .then((_) {
       setState(() { selectedCardModel = cardModel; });
     });
-
-    return EventDisposition.processed;
   }
 
   Widget builder(int index) {
@@ -63,9 +61,9 @@ class EnsureVisibleApp extends App {
         child: new Center(child: new Text(cardModel.label, style: style))
       )
     );
-    return new Listener(
+    return new GestureDetector(
       key: cardModel.key,
-      onGestureTap: (_) { return handleTap(card, cardModel); },
+      onTap: () => handleTap(card, cardModel),
       child: card
     );
   }

examples/widgets/mixed_viewport.dart

@@ -106,17 +106,15 @@ class MixedViewportApp extends App {
   Widget builder(int index) {
     if (index >= lengths.length)
       return null;
-    return new Listener(
+    return new GestureDetector(
       key: new Key.stringify(lengths[index]),
+      onTap: () => removeBox(index),
       child: new Container(
         decoration: new BoxDecoration(
           backgroundColor: new Color((0xFF000000 + 0xFFFFFF * lengths[index] / kMaxLength).round())
         ),
         height: lengths[index] + 12.0
-      ),
-      onGestureTap: (_) {
-        removeBox(index);
-      }
+      )
     );
   }
 
@@ -124,7 +122,4 @@ class MixedViewportApp extends App {
 
 void main() {
   runApp(new MixedViewportApp());
-  // scheduler.addPersistentFrameCallback((_) {
-  //   SkyBinding.instance.debugDumpRenderTree();
-  // });
 }

examples/widgets/pop_out_and_expand.dart

@@ -46,8 +46,8 @@ class ExampleApp extends App {
   GlobalKey _overlay;
 
   Widget _buildCard(CardData cardData) {
-    return new Listener(
-      onGestureTap: (_) {
+    return new GestureDetector(
+      onTap: () {
         setState(() {
           _overlay = cardData.key;
         });

examples/widgets/progress_indicator.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:sky' as sky;
-
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/animation/animated_value.dart';
 import 'package:sky/animation/curves.dart';
@@ -28,7 +26,7 @@ class ProgressIndicatorApp extends App {
       );
   }
 
-  void handleTap(sky.GestureEvent event) {
+  void handleTap() {
     if (valueAnimation.isAnimating)
       valueAnimation.stop();
     else
@@ -73,8 +71,8 @@ class ProgressIndicatorApp extends App {
   }
 
   Widget build() {
-    Widget body = new Listener(
-      onGestureTap: (e) { handleTap(e); },
+    Widget body = new GestureDetector(
+      onTap: handleTap,
       child: new Container(
         padding: const EdgeDims.symmetric(vertical: 12.0, horizontal: 8.0),
         decoration: new BoxDecoration(backgroundColor: Theme.of(this).cardColor),

packages/flutter/lib/widgets.dart

@@ -23,6 +23,7 @@ export 'widgets/flat_button.dart';
 export 'widgets/floating_action_button.dart';
 export 'widgets/focus.dart';
 export 'widgets/framework.dart';
+export 'widgets/gesture_detector.dart';
 export 'widgets/icon.dart';
 export 'widgets/icon_button.dart';
 export 'widgets/ink_well.dart';

packages/flutter/lib/widgets/date_picker.dart

@@ -140,21 +140,21 @@ class DatePickerHeader extends Component {
     return new Container(
       child: new BlockBody([
         new Center(
-          child: new Listener(
+          child: new GestureDetector(
             child: new Text(new DateFormat("MMM").format(selectedDate).toUpperCase(), style: monthStyle),
-            onGestureTap: (_) => _handleChangeMode(DatePickerMode.day)
+            onTap: () => _handleChangeMode(DatePickerMode.day)
           )
         ),
         new Center(
-          child: new Listener(
+          child: new GestureDetector(
             child: new Text(new DateFormat("d").format(selectedDate), style: dayStyle),
-            onGestureTap: (_) => _handleChangeMode(DatePickerMode.day)
+            onTap: () => _handleChangeMode(DatePickerMode.day)
           )
         ),
         new Center(
-          child: new Listener(
+          child: new GestureDetector(
             child: new Text(new DateFormat("yyyy").format(selectedDate), style: yearStyle),
-            onGestureTap: (_) => _handleChangeMode(DatePickerMode.year)
+            onTap: () => _handleChangeMode(DatePickerMode.year)
           )
         )
       ]),
@@ -244,8 +244,8 @@ class DayPicker extends Component {
             currentDate.day == day)
           itemStyle = itemStyle.copyWith(color: theme.primaryColor);
 
-        item = new Listener(
-          onGestureTap: (_) {
+        item = new GestureDetector(
+          onTap: () {
             DateTime result = new DateTime(year, month, day);
             onChanged(result);
           },
@@ -386,9 +386,9 @@ class YearPicker extends ScrollableWidgetList {
     for(int i = start; i < start + count; i++) {
       int year = firstDate.year + i;
       String label = year.toString();
-      Widget item = new Listener(
+      Widget item = new GestureDetector(
         key: new Key(label),
-        onGestureTap: (_) {
+        onTap: () {
           DateTime result = new DateTime(year, selectedDate.month, selectedDate.day);
           onChanged(result);
         },

packages/flutter/lib/widgets/dialog.dart

@@ -10,6 +10,7 @@ import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/default_text_style.dart';
 import 'package:sky/widgets/focus.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/material.dart';
 import 'package:sky/widgets/navigator.dart';
 import 'package:sky/widgets/scrollable.dart';
@@ -101,13 +102,13 @@ class Dialog extends Component {
       ));
 
     return new Stack([
-      new Listener(
+      new GestureDetector(
         child: new Container(
           decoration: const BoxDecoration(
             backgroundColor: const Color(0x7F000000)
           )
         ),
-        onGestureTap: (_) => onDismiss()
+        onTap: onDismiss
       ),
       new Center(
         child: new Container(

packages/flutter/lib/widgets/drawer.dart

@@ -8,10 +8,11 @@ import 'dart:sky' as sky;
 import 'package:sky/animation/animated_value.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/animation/forces.dart';
-import 'package:sky/theme/shadows.dart';
 import 'package:sky/theme/colors.dart' as colors;
+import 'package:sky/theme/shadows.dart';
 import 'package:sky/widgets/animated_container.dart';
 import 'package:sky/widgets/basic.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/navigator.dart';
 import 'package:sky/widgets/scrollable.dart';
 import 'package:sky/widgets/theme.dart';
@@ -84,14 +85,16 @@ class Drawer extends StatefulComponent {
   }
 
   Widget build() {
-    var mask = new Listener(
+    var mask = new GestureDetector(
       child: new ColorTransition(
         performance: _performance,
         direction: showing ? Direction.forward : Direction.reverse,
         color: new AnimatedColorValue(colors.transparent, end: const Color(0x7F000000)),
         child: new Container()
       ),
-      onGestureTap: handleMaskTap
+      onTap: () {
+        _performance.reverse();
+      }
     );
 
     Widget content = new SlideTransition(
@@ -132,11 +135,6 @@ class Drawer extends StatefulComponent {
 
   void _settle() { _isMostlyClosed ? _performance.reverse() : _performance.play(); }
 
-  EventDisposition handleMaskTap(_) {
-    _performance.reverse();
-    return EventDisposition.consumed;
-  }
-
   // TODO(mpcomplete): Figure out how to generalize these handlers on a
   // "PannableThingy" interface.
   EventDisposition handlePointerDown(_) {

packages/flutter/lib/widgets/drawer_item.dart

@@ -9,10 +9,11 @@ import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/button_base.dart';
 import 'package:sky/widgets/default_text_style.dart';
+import 'package:sky/widgets/framework.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/icon.dart';
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/theme.dart';
-import 'package:sky/widgets/framework.dart';
 
 typedef EventDisposition OnPressedFunction();
 
@@ -81,12 +82,8 @@ class DrawerItem extends ButtonBase {
       )
     );
 
-    return new Listener(
-      onGestureTap: (_) {
-        if (onPressed != null)
-          return onPressed();
-        return EventDisposition.ignored;
-      },
+    return new GestureDetector(
+      onTap: onPressed,
       child: new Container(
         height: 48.0,
         decoration: new BoxDecoration(backgroundColor: _getBackgroundColor(themeData)),

packages/flutter/lib/widgets/floating_action_button.dart

@@ -4,6 +4,7 @@
 
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/button_base.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/icon.dart';
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/material.dart';
@@ -47,11 +48,8 @@ class FloatingActionButton extends ButtonBase {
       type: MaterialType.circle,
       level: highlight ? 3 : 2,
       child: new ClipOval(
-        child: new Listener(
-          onGestureTap: (_) {
-            if (onPressed != null)
-              onPressed();
-          },
+        child: new GestureDetector(
+          onTap: onPressed,
           child: new Container(
             width: _kSize,
             height: _kSize,

packages/flutter/lib/widgets/icon_button.dart

@@ -27,10 +27,7 @@ class IconButton extends Component {
       );
     }
     return new GestureDetector(
-      onTap: () {
-        if (onPressed != null)
-          onPressed();
-      },
+      onTap: onPressed,
       child: new Padding(
         child: child,
         padding: const EdgeDims.all(8.0))

packages/flutter/lib/widgets/material_button.dart

@@ -4,6 +4,7 @@
 
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/button_base.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/material.dart';
 
@@ -36,7 +37,8 @@ abstract class MaterialButton extends ButtonBase {
       padding: new EdgeDims.symmetric(horizontal: 8.0),
       child: new Center(child: child) // TODO(ianh): figure out a way to compell the child to have gray text when disabled...
     );
-    return new Listener(
+    return new GestureDetector(
+      onTap: enabled ? onPressed : null,
       child: new Container(
         height: 36.0,
         constraints: new BoxConstraints(minWidth: 88.0),
@@ -47,8 +49,7 @@ abstract class MaterialButton extends ButtonBase {
           level: level,
           color: color
         )
-      ),
-      onGestureTap: (_) { if (onPressed != null && enabled) onPressed(); }
+      )
     );
   }
 

packages/flutter/lib/widgets/modal_overlay.dart

@@ -4,6 +4,7 @@
 
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/framework.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 
 class ModalOverlay extends Component {
 
@@ -13,11 +14,8 @@ class ModalOverlay extends Component {
   final Function onDismiss;
 
   Widget build() {
-    return new Listener(
-      onGestureTap: (_) {
-        if (onDismiss != null)
-          onDismiss();
-      },
+    return new GestureDetector(
+      onTap: onDismiss,
       child: new Stack(children)
     );
   }

packages/flutter/lib/widgets/popup_menu_item.dart

@@ -5,6 +5,7 @@
 import 'package:sky/painting/text_style.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/default_text_style.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/theme.dart';
 
@@ -24,11 +25,8 @@ class PopupMenuItem extends Component {
   TextStyle get textStyle => Theme.of(this).text.subhead;
 
   Widget build() {
-    return new Listener(
-      onGestureTap: (_) {
-        if (onPressed != null)
-          onPressed();
-      },
+    return new GestureDetector(
+      onTap: onPressed,
       child: new InkWell(
         child: new Container(
           height: kMenuItemHeight,

packages/flutter/lib/widgets/radio.dart

@@ -7,6 +7,7 @@ import 'dart:sky' as sky;
 import 'package:sky/rendering/object.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/button_base.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/theme.dart';
 
 const sky.Color _kLightOffColor = const sky.Color(0x8A000000);
@@ -21,7 +22,9 @@ class Radio extends ButtonBase {
     this.value,
     this.groupValue,
     this.onChanged
-  }) : super(key: key);
+  }) : super(key: key) {
+    assert(onChanged != null);
+  }
 
   Object value;
   Object groupValue;
@@ -45,7 +48,8 @@ class Radio extends ButtonBase {
     const double kDiameter = 16.0;
     const double kOuterRadius = kDiameter / 2;
     const double kInnerRadius = 5.0;
-    return new Listener(
+    return new GestureDetector(
+      onTap: () => onChanged(value),
       child: new Container(
         margin: const EdgeDims.symmetric(horizontal: 5.0),
         width: kDiameter,
@@ -67,14 +71,8 @@ class Radio extends ButtonBase {
             }
           }
         )
-      ),
-      onGestureTap: _handleTap
+      )
     );
   }
 
-  EventDisposition _handleTap(_) {
-    onChanged(value);
-    return EventDisposition.consumed;
-  }
-
 }

packages/flutter/lib/widgets/snack_bar.dart

@@ -10,6 +10,7 @@ import 'package:sky/painting/text_style.dart';
 import 'package:sky/theme/typography.dart' as typography;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/default_text_style.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/material.dart';
 import 'package:sky/widgets/theme.dart';
 import 'package:sky/widgets/transitions.dart';
@@ -29,8 +30,8 @@ class SnackBarAction extends Component {
   final Function onPressed;
 
   Widget build() {
-    return new Listener(
-      onGestureTap: (_) => onPressed(),
+    return new GestureDetector(
+      onTap: onPressed,
       child: new Container(
         margin: const EdgeDims.only(left: 24.0),
         padding: const EdgeDims.only(top: 14.0, bottom: 14.0),
@@ -39,6 +40,7 @@ class SnackBarAction extends Component {
     );
   }
 }
+
 class SnackBar extends Component {
 
   SnackBar({
@@ -58,11 +60,6 @@ class SnackBar extends Component {
   bool showing;
   SnackBarDismissedCallback onDismissed;
 
-  void _onDismissed() {
-    if (onDismissed != null)
-      onDismissed();
-  }
-
   Widget build() {
     List<Widget> children = [
       new Flexible(
@@ -84,7 +81,7 @@ class SnackBar extends Component {
       position: new AnimatedValue<Point>(Point.origin,
                                          end: const Point(0.0, -52.0),
                                          curve: easeIn, reverseCurve: easeOut),
-      onDismissed: _onDismissed,
+      onDismissed: onDismissed,
       anchor: anchor,
       child: new Material(
         level: 2,

packages/flutter/lib/widgets/tabs.dart

@@ -18,12 +18,13 @@ import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/theme/typography.dart' as typography;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/default_text_style.dart';
+import 'package:sky/widgets/framework.dart';
+import 'package:sky/widgets/gesture_detector.dart';
 import 'package:sky/widgets/icon.dart';
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/scrollable.dart';
 import 'package:sky/widgets/theme.dart';
 import 'package:sky/widgets/transitions.dart';
-import 'package:sky/widgets/framework.dart';
 
 typedef void SelectedIndexChanged(int selectedIndex);
 typedef void LayoutChanged(Size size, List<double> widths);
@@ -478,14 +479,14 @@ class TabBar extends Scrollable {
   }
 
   Widget _toTab(TabLabel label, int tabIndex, Color color, Color selectedColor) {
-    return new Listener(
+    return new GestureDetector(
+      onTap: () => _handleTap(tabIndex),
       child: new Tab(
         label: label,
         color: color,
         selected: tabIndex == selectedIndex,
         selectedColor: selectedColor
-      ),
-      onGestureTap: (_) => _handleTap(tabIndex)
+      )
     );
   }
 

packages/unit/test/widget/widget_tester.dart

@@ -84,7 +84,9 @@ class WidgetTester {
   }
 
   void tap(Widget widget) {
-    dispatchEvent(new TestGestureEvent(type: 'gesturetap'), getCenter(widget));
+    Point location = getCenter(widget);
+    dispatchEvent(new TestPointerEvent(type: 'pointerdown', x: location.x, y: location.y), location);
+    dispatchEvent(new TestPointerEvent(type: 'pointerup', x: location.x, y: location.y), location);
   }
 
   void scroll(Widget widget, Offset offset) {