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MultiTapGestureRecognizer draft

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This commit is contained in:
open-trade 2020-11-22 14:47:43 +08:00
parent 49760b4ad5
commit 25b2f52462
1 changed files with 74 additions and 25 deletions
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53
flutter_hbb/lib/remote_page.dart
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@ -1,4 +1,5 @@
import 'package:flutter/material.dart';
import 'package:flutter/gestures.dart';
import 'package:provider/provider.dart';
import 'package:flutter/services.dart';
import 'dart:ui' as ui;
@ -102,7 +103,7 @@ class _RemotePageState extends State<RemotePage> {
onPressed: () {
setState(() => _showBar = !_showBar);
}),
bottomNavigationBar: _showBar && _bottom < 100
bottomNavigationBar: _showBar
? BottomAppBar(
elevation: 10,
color: MyTheme.accent,
@ -122,6 +123,8 @@ class _RemotePageState extends State<RemotePage> {
color: Colors.white,
icon: Icon(Icons.keyboard),
onPressed: () {
SystemChrome.setEnabledSystemUIOverlays(
SystemUiOverlay.values);
SystemChannels.textInput
.invokeMethod('TextInput.show');
_focusNode.requestFocus();
@ -165,6 +168,21 @@ class _RemotePageState extends State<RemotePage> {
body: FlutterEasyLoading(
child: Container(
color: MyTheme.canvasColor,
child: RawGestureDetector(
gestures: {
MultiTouchGestureRecognizer:
GestureRecognizerFactoryWithHandlers<
MultiTouchGestureRecognizer>(
() => MultiTouchGestureRecognizer(),
(MultiTouchGestureRecognizer instance) {
instance.onMultiTap = (
touchCount,
addOrRemove,
) =>
print('$touchCount, $addOrRemove');
},
),
},
child: GestureDetector(
onTap: () {
if (_pan) return;
@ -191,7 +209,7 @@ class _RemotePageState extends State<RemotePage> {
ImagePaint(),
CursorPaint(),
])),
),
)),
)))));
}
@ -411,3 +429,34 @@ void showActions(BuildContext context) {
true,
0);
}
class MultiTouchGestureRecognizer extends MultiTapGestureRecognizer {
MultiTouchGestureRecognizerCallback onMultiTap;
var numberOfTouches = 0;
MultiTouchGestureRecognizer() {
super.onTapDown = (pointer, details) => addTouch(pointer, details);
super.onTapUp = (pointer, details) => removeTouch(pointer, details);
super.onTapCancel = (pointer) => cancelTouch(pointer);
super.onTap = (pointer) => captureDefaultTap(pointer);
}
void addTouch(int pointer, TapDownDetails details) {
numberOfTouches++;
onMultiTap(numberOfTouches, true);
}
void removeTouch(int pointer, TapUpDetails details) {
numberOfTouches--;
onMultiTap(numberOfTouches, false);
}
void cancelTouch(int pointer) {
numberOfTouches = 0;
}
void captureDefaultTap(int pointer) {}
}
typedef MultiTouchGestureRecognizerCallback = void Function(
int touchCount, bool addOrRemove);