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button: Replace GestureDetector with Listener for AnimatedScaleOnTap #1954

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button: Replace GestureDetector with Listener for AnimatedScaleOnTap #1954

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8 changes: 4 additions & 4 deletions lib/widgets/button.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -303,11 +303,11 @@ class _AnimatedScaleOnTapState extends State<AnimatedScaleOnTap> {

@override
Widget build(BuildContext context) {
return GestureDetector(
return Listener(
behavior: HitTestBehavior.translucent,
onTapDown: (_) => _changeScale(widget.scaleEnd),
onTapUp: (_) => _changeScale(1),
onTapCancel: () => _changeScale(1),
onPointerDown: (_) => _changeScale(widget.scaleEnd),
onPointerUp: (_) => _changeScale(1),
onPointerCancel: (_) => _changeScale(1),
child: AnimatedScale(
scale: _scale,
duration: widget.duration,
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33 changes: 33 additions & 0 deletions test/widgets/button_test.dart
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Expand Up @@ -114,6 +114,39 @@ void main() {
check(renderObject).size.equals(Size.square(40));
});

group('AnimatedScaleOnTap', () {
void checkScale(WidgetTester tester, Finder finder, double expectedScale) {
final scale = tester.widget<AnimatedScale>(finder).scale;
check(scale).equals(expectedScale);
}

testWidgets('Animation happen instantly when tap down', (tester) async {
addTearDown(testBinding.reset);

await tester.pumpWidget(TestZulipApp(
child: AnimatedScaleOnTap(
scaleEnd: 0.95,
duration: Duration(milliseconds: 100),
child: UnconstrainedBox(
child: ZulipIconButton(
icon: ZulipIcons.follow,
onPressed: () {})))));
await tester.pump();

final animatedScaleFinder = find.byType(AnimatedScale);

// Now that the widget is being held down, its scale should be at the target scaleEnd i.e 0.95.
final gesture = await tester.startGesture(tester.getCenter(find.byType(ZulipIconButton)));
await tester.pumpAndSettle();
checkScale(tester, animatedScaleFinder, 0.95);

// After releasing, the scale must return to 1.0.
await gesture.up();
await tester.pumpAndSettle();
checkScale(tester, animatedScaleFinder, 1.0);
});
});

// TODO test that the touch feedback fills the whole square
});
}