接收“ onVerticalDragUpdate”在嵌套的“ GestureDetectors”上在Flutter [英] Receive "onVerticalDragUpdate" on nested "GestureDetectors" in Flutter
问题描述
以下代码段只是我实际情况的最小化版本。在我的实际情况中,这些 GestureDetectors
位于不同的小部件中。我的问题是, onVerticalDragUpdate
事件仅由内部GestureDetector接收。我什至将内部 GestureDetector
的行为
设置为 HitTestBehavior.translucent
,这意味着事件应该冒泡到父窗口小部件。还是我弄错了?
The following snippet is just a minimalized version of my real situation. In my real situation these GestureDetectors
are inside different widgets. My problem is, that the onVerticalDragUpdate
event is only received by the inner GestureDetector. I even set the behavior
of the inner GestureDetector
to HitTestBehavior.translucent
, which means that the event should bubble up to parent widgets. Or am I getting there something wrong?
void main() {
debugPaintPointersEnabled = true;
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
@override
Widget build(BuildContext context) {
return GestureDetector(
onVerticalDragUpdate: (details) {
var test = "test";
},
child: GestureDetector(
behavior: HitTestBehavior.translucent,
onVerticalDragUpdate: (details) {
var test = "test";
},
child: Container(height: 100, width: 100, color: Colors.red),
));
}
}
推荐答案
每个有兴趣的人,这就是我的解决方法:
For everyone who is interested, this was how I solved it:
class _MyAppState extends State<MyApp> {
@override
Widget build(BuildContext context) {
return RawGestureDetector(
gestures: {
AllowMultipleVerticalDragGestureRecognizer: GestureRecognizerFactoryWithHandlers<
AllowMultipleVerticalDragGestureRecognizer>(
() => AllowMultipleVerticalDragGestureRecognizer(),
(AllowMultipleVerticalDragGestureRecognizer instance) {
instance..onEnd = (_) => print("test1");
},
)
},
child: RawGestureDetector(
gestures: {
AllowMultipleVerticalDragGestureRecognizer: GestureRecognizerFactoryWithHandlers<
AllowMultipleVerticalDragGestureRecognizer>(
() => AllowMultipleVerticalDragGestureRecognizer(),
(AllowMultipleVerticalDragGestureRecognizer instance) {
instance..onEnd = (_) => print("test2");
},
)
},
child: Container(color: Colors.red),
));
}
}
class AllowMultipleVerticalDragGestureRecognizer extends VerticalDragGestureRecognizer{
@override
void rejectGesture(int pointer) {
acceptGesture(pointer);
}
}
贷方: https://gist.github.com/Nash0x7E2/08acca529096d93f3df0f60f9c034056
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