767 lines
22 KiB
Dart
767 lines
22 KiB
Dart
import 'dart:async';
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import 'package:flutter/gestures.dart';
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import 'package:flutter/widgets.dart';
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enum GestureState {
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none,
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oneFingerPan,
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twoFingerScale,
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threeFingerVerticalDrag
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}
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class CustomTouchGestureRecognizer extends ScaleGestureRecognizer {
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CustomTouchGestureRecognizer({
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Object? debugOwner,
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Set<PointerDeviceKind>? supportedDevices,
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}) : super(
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debugOwner: debugOwner,
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supportedDevices: supportedDevices,
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) {
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_init();
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}
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// oneFingerPan
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GestureDragStartCallback? onOneFingerPanStart;
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GestureDragUpdateCallback? onOneFingerPanUpdate;
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GestureDragEndCallback? onOneFingerPanEnd;
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// twoFingerScale : scale + pan event
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GestureScaleStartCallback? onTwoFingerScaleStart;
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GestureScaleUpdateCallback? onTwoFingerScaleUpdate;
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GestureScaleEndCallback? onTwoFingerScaleEnd;
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// threeFingerVerticalDrag
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GestureDragStartCallback? onThreeFingerVerticalDragStart;
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GestureDragUpdateCallback? onThreeFingerVerticalDragUpdate;
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GestureDragEndCallback? onThreeFingerVerticalDragEnd;
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var _currentState = GestureState.none;
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Timer? _debounceTimer;
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void _init() {
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debugPrint("CustomTouchGestureRecognizer init");
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// onStart = (d) {};
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onUpdate = (d) {
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_debounceTimer?.cancel();
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if (d.pointerCount == 1 && _currentState != GestureState.oneFingerPan) {
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onOneFingerStartDebounce(d);
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} else if (d.pointerCount == 2 &&
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_currentState != GestureState.twoFingerScale) {
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onTwoFingerStartDebounce(d);
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} else if (d.pointerCount == 3 &&
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_currentState != GestureState.threeFingerVerticalDrag) {
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_currentState = GestureState.threeFingerVerticalDrag;
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if (onThreeFingerVerticalDragStart != null) {
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onThreeFingerVerticalDragStart!(
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DragStartDetails(globalPosition: d.localFocalPoint));
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}
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debugPrint("start threeFingerScale");
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}
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if (_currentState != GestureState.none) {
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switch (_currentState) {
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case GestureState.oneFingerPan:
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if (onOneFingerPanUpdate != null) {
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onOneFingerPanUpdate!(_getDragUpdateDetails(d));
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}
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break;
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case GestureState.twoFingerScale:
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if (onTwoFingerScaleUpdate != null) {
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onTwoFingerScaleUpdate!(d);
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}
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break;
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case GestureState.threeFingerVerticalDrag:
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if (onThreeFingerVerticalDragUpdate != null) {
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onThreeFingerVerticalDragUpdate!(_getDragUpdateDetails(d));
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}
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break;
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default:
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break;
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}
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return;
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}
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};
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onEnd = (d) {
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debugPrint("ScaleGestureRecognizer onEnd");
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_debounceTimer?.cancel();
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// end
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switch (_currentState) {
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case GestureState.oneFingerPan:
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debugPrint("TwoFingerState.pan onEnd");
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if (onOneFingerPanEnd != null) {
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onOneFingerPanEnd!(_getDragEndDetails(d));
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}
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break;
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case GestureState.twoFingerScale:
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debugPrint("TwoFingerState.scale onEnd");
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if (onTwoFingerScaleEnd != null) {
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onTwoFingerScaleEnd!(d);
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}
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break;
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case GestureState.threeFingerVerticalDrag:
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debugPrint("ThreeFingerState.vertical onEnd");
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if (onThreeFingerVerticalDragEnd != null) {
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onThreeFingerVerticalDragEnd!(_getDragEndDetails(d));
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}
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break;
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default:
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break;
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}
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_debounceTimer = Timer(Duration(milliseconds: 200), () {
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_currentState = GestureState.none;
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});
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};
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}
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// FIXME: This debounce logic is not working properly.
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// If we move our finger very fast, we won't be able to detect the "oneFingerPan" event sometimes.
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void onOneFingerStartDebounce(ScaleUpdateDetails d) {
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start(ScaleUpdateDetails d) {
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_currentState = GestureState.oneFingerPan;
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if (onOneFingerPanStart != null) {
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onOneFingerPanStart!(DragStartDetails(
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localPosition: d.localFocalPoint, globalPosition: d.focalPoint));
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}
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}
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if (_currentState != GestureState.none) {
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_debounceTimer = Timer(Duration(milliseconds: 200), () {
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start(d);
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debugPrint("debounce start oneFingerPan");
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});
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} else {
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start(d);
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debugPrint("start oneFingerPan");
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}
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}
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void onTwoFingerStartDebounce(ScaleUpdateDetails d) {
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start(ScaleUpdateDetails d) {
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_currentState = GestureState.twoFingerScale;
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if (onTwoFingerScaleStart != null) {
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onTwoFingerScaleStart!(ScaleStartDetails(
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localFocalPoint: d.localFocalPoint, focalPoint: d.focalPoint));
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}
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}
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if (_currentState == GestureState.threeFingerVerticalDrag) {
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_debounceTimer = Timer(Duration(milliseconds: 200), () {
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start(d);
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debugPrint("debounce start twoFingerScale");
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});
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} else {
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start(d);
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debugPrint("start twoFingerScale");
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}
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}
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DragUpdateDetails _getDragUpdateDetails(ScaleUpdateDetails d) =>
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DragUpdateDetails(
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globalPosition: d.focalPoint,
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localPosition: d.localFocalPoint,
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delta: d.focalPointDelta);
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DragEndDetails _getDragEndDetails(ScaleEndDetails d) =>
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DragEndDetails(velocity: d.velocity);
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}
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class HoldTapMoveGestureRecognizer extends GestureRecognizer {
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HoldTapMoveGestureRecognizer({
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Object? debugOwner,
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Set<PointerDeviceKind>? supportedDevices,
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}) : super(
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debugOwner: debugOwner,
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supportedDevices: supportedDevices,
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);
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GestureDragStartCallback? onHoldDragStart;
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GestureDragUpdateCallback? onHoldDragUpdate;
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GestureDragDownCallback? onHoldDragDown;
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GestureDragCancelCallback? onHoldDragCancel;
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GestureDragEndCallback? onHoldDragEnd;
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bool _isStart = false;
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Timer? _firstTapUpTimer;
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Timer? _secondTapDownTimer;
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_TapTracker? _firstTap;
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_TapTracker? _secondTap;
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PointerDownEvent? _lastPointerDownEvent;
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final Map<int, _TapTracker> _trackers = <int, _TapTracker>{};
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@override
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bool isPointerAllowed(PointerDownEvent event) {
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if (_firstTap == null) {
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switch (event.buttons) {
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case kPrimaryButton:
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if (onHoldDragStart == null &&
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onHoldDragUpdate == null &&
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onHoldDragCancel == null &&
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onHoldDragEnd == null) {
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return false;
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}
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break;
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default:
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return false;
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}
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}
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return super.isPointerAllowed(event);
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}
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@override
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void addAllowedPointer(PointerDownEvent event) {
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if (_firstTap != null) {
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if (!_firstTap!.isWithinGlobalTolerance(event, kDoubleTapSlop)) {
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// Ignore out-of-bounds second taps.
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return;
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} else if (!_firstTap!.hasElapsedMinTime() ||
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!_firstTap!.hasSameButton(event)) {
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// Restart when the second tap is too close to the first (touch screens
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// often detect touches intermittently), or when buttons mismatch.
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_reset();
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return _trackTap(event);
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} else if (onHoldDragDown != null) {
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invokeCallback<void>(
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'onHoldDragDown',
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() => onHoldDragDown!(DragDownDetails(
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globalPosition: event.position,
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localPosition: event.localPosition)));
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}
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}
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_trackTap(event);
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}
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void _trackTap(PointerDownEvent event) {
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_stopFirstTapUpTimer();
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_stopSecondTapDownTimer();
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final _TapTracker tracker = _TapTracker(
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event: event,
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entry: GestureBinding.instance.gestureArena.add(event.pointer, this),
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doubleTapMinTime: kDoubleTapMinTime,
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gestureSettings: gestureSettings,
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);
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_trackers[event.pointer] = tracker;
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_lastPointerDownEvent = event;
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tracker.startTrackingPointer(_handleEvent, event.transform);
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}
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void _handleEvent(PointerEvent event) {
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final _TapTracker tracker = _trackers[event.pointer]!;
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if (event is PointerUpEvent) {
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if (_firstTap == null && _secondTap == null) {
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_registerFirstTap(tracker);
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} else if (_secondTap != null) {
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if (event.pointer == _secondTap!.pointer) {
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if (onHoldDragEnd != null) {
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onHoldDragEnd!(DragEndDetails());
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_secondTap = null;
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_isStart = false;
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}
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}
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} else {
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_reject(tracker);
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}
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} else if (event is PointerDownEvent) {
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if (_firstTap != null && _secondTap == null) {
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_registerSecondTap(tracker);
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}
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} else if (event is PointerMoveEvent) {
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if (!tracker.isWithinGlobalTolerance(event, kDoubleTapTouchSlop)) {
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if (_firstTap != null && _firstTap!.pointer == event.pointer) {
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// first tap move
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_reject(tracker);
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} else if (_secondTap != null && _secondTap!.pointer == event.pointer) {
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// debugPrint("_secondTap move");
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// second tap move
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if (!_isStart) {
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_resolve();
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}
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if (onHoldDragUpdate != null) {
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onHoldDragUpdate!(DragUpdateDetails(
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globalPosition: event.position,
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localPosition: event.localPosition,
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delta: event.delta));
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}
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}
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}
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} else if (event is PointerCancelEvent) {
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_reject(tracker);
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}
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}
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@override
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void acceptGesture(int pointer) {}
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@override
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void rejectGesture(int pointer) {
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_TapTracker? tracker = _trackers[pointer];
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// If tracker isn't in the list, check if this is the first tap tracker
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if (tracker == null && _firstTap != null && _firstTap!.pointer == pointer) {
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tracker = _firstTap;
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}
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// If tracker is still null, we rejected ourselves already
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if (tracker != null) {
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_reject(tracker);
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}
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}
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void _resolve() {
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_stopSecondTapDownTimer();
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_firstTap?.entry.resolve(GestureDisposition.accepted);
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_secondTap?.entry.resolve(GestureDisposition.accepted);
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_isStart = true;
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// TODO start details
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if (onHoldDragStart != null) {
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onHoldDragStart!(DragStartDetails(
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kind: _lastPointerDownEvent?.kind,
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));
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}
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}
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void _reject(_TapTracker tracker) {
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try {
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_checkCancel();
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_isStart = false;
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_trackers.remove(tracker.pointer);
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tracker.entry.resolve(GestureDisposition.rejected);
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_freezeTracker(tracker);
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_reset();
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} catch (e) {
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debugPrint("Failed to _reject:$e");
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}
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}
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@override
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void dispose() {
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_reset();
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super.dispose();
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}
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void _reset() {
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_isStart = false;
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// debugPrint("reset");
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_stopFirstTapUpTimer();
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_stopSecondTapDownTimer();
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if (_firstTap != null) {
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if (_trackers.isNotEmpty) {
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_checkCancel();
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}
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// Note, order is important below in order for the resolve -> reject logic
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// to work properly.
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final _TapTracker tracker = _firstTap!;
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_firstTap = null;
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_reject(tracker);
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GestureBinding.instance.gestureArena.release(tracker.pointer);
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if (_secondTap != null) {
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final _TapTracker tracker = _secondTap!;
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_secondTap = null;
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_reject(tracker);
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GestureBinding.instance.gestureArena.release(tracker.pointer);
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}
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}
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_firstTap = null;
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_secondTap = null;
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_clearTrackers();
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}
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void _registerFirstTap(_TapTracker tracker) {
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_startFirstTapUpTimer();
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GestureBinding.instance.gestureArena.hold(tracker.pointer);
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// Note, order is important below in order for the clear -> reject logic to
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// work properly.
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_freezeTracker(tracker);
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_trackers.remove(tracker.pointer);
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_firstTap = tracker;
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}
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void _registerSecondTap(_TapTracker tracker) {
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if (_firstTap != null) {
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_stopFirstTapUpTimer();
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_freezeTracker(_firstTap!);
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_firstTap = null;
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}
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_startSecondTapDownTimer();
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GestureBinding.instance.gestureArena.hold(tracker.pointer);
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_secondTap = tracker;
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// TODO
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}
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void _clearTrackers() {
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_trackers.values.toList().forEach(_reject);
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assert(_trackers.isEmpty);
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}
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void _freezeTracker(_TapTracker tracker) {
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tracker.stopTrackingPointer(_handleEvent);
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}
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void _startFirstTapUpTimer() {
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_firstTapUpTimer ??= Timer(kDoubleTapTimeout, _reset);
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}
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void _startSecondTapDownTimer() {
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_secondTapDownTimer ??= Timer(kDoubleTapTimeout, _resolve);
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}
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void _stopFirstTapUpTimer() {
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if (_firstTapUpTimer != null) {
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_firstTapUpTimer!.cancel();
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_firstTapUpTimer = null;
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}
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}
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void _stopSecondTapDownTimer() {
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if (_secondTapDownTimer != null) {
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_secondTapDownTimer!.cancel();
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_secondTapDownTimer = null;
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}
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}
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void _checkCancel() {
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if (onHoldDragCancel != null) {
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invokeCallback<void>('onHoldDragCancel', onHoldDragCancel!);
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}
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}
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@override
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String get debugDescription => 'double tap';
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}
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class DoubleFinerTapGestureRecognizer extends GestureRecognizer {
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DoubleFinerTapGestureRecognizer({
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Object? debugOwner,
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Set<PointerDeviceKind>? supportedDevices,
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}) : super(
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debugOwner: debugOwner,
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supportedDevices: supportedDevices,
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);
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GestureTapDownCallback? onDoubleFinerTapDown;
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GestureTapDownCallback? onDoubleFinerTap;
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GestureTapCancelCallback? onDoubleFinerTapCancel;
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Timer? _firstTapTimer;
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_TapTracker? _firstTap;
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PointerDownEvent? _lastPointerDownEvent;
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var _isStart = false;
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final Set<int> _upTap = {};
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final Map<int, _TapTracker> _trackers = <int, _TapTracker>{};
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@override
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bool isPointerAllowed(PointerDownEvent event) {
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if (_firstTap == null) {
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switch (event.buttons) {
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case kPrimaryButton:
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if (onDoubleFinerTapDown == null &&
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onDoubleFinerTap == null &&
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onDoubleFinerTapCancel == null) {
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return false;
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}
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break;
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default:
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return false;
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}
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}
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return super.isPointerAllowed(event);
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}
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@override
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void addAllowedPointer(PointerDownEvent event) {
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debugPrint("addAllowedPointer");
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if (_isStart) {
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// second
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if (onDoubleFinerTapDown != null) {
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final TapDownDetails details = TapDownDetails(
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globalPosition: event.position,
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localPosition: event.localPosition,
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kind: getKindForPointer(event.pointer),
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);
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invokeCallback<void>(
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'onDoubleFinerTapDown', () => onDoubleFinerTapDown!(details));
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}
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} else {
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// first tap
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_isStart = true;
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_lastPointerDownEvent = event;
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_startFirstTapDownTimer();
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}
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_trackTap(event);
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}
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void _trackTap(PointerDownEvent event) {
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final _TapTracker tracker = _TapTracker(
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event: event,
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entry: GestureBinding.instance.gestureArena.add(event.pointer, this),
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doubleTapMinTime: kDoubleTapMinTime,
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gestureSettings: gestureSettings,
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);
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_trackers[event.pointer] = tracker;
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// debugPrint("_trackers:$_trackers");
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tracker.startTrackingPointer(_handleEvent, event.transform);
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_registerTap(tracker);
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}
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void _handleEvent(PointerEvent event) {
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final _TapTracker tracker = _trackers[event.pointer]!;
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if (event is PointerUpEvent) {
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debugPrint("PointerUpEvent");
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_upTap.add(tracker.pointer);
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} else if (event is PointerMoveEvent) {
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if (!tracker.isWithinGlobalTolerance(event, kDoubleTapTouchSlop)) {
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_reject(tracker);
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}
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} else if (event is PointerCancelEvent) {
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_reject(tracker);
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}
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}
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@override
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void acceptGesture(int pointer) {}
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@override
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void rejectGesture(int pointer) {
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_TapTracker? tracker = _trackers[pointer];
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// If tracker isn't in the list, check if this is the first tap tracker
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if (tracker == null && _firstTap != null && _firstTap!.pointer == pointer) {
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tracker = _firstTap;
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}
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// If tracker is still null, we rejected ourselves already
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if (tracker != null) {
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_reject(tracker);
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}
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}
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void _reject(_TapTracker tracker) {
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_trackers.remove(tracker.pointer);
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tracker.entry.resolve(GestureDisposition.rejected);
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_freezeTracker(tracker);
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if (_firstTap != null) {
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if (tracker == _firstTap) {
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_reset();
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} else {
|
|
_checkCancel();
|
|
if (_trackers.isEmpty) {
|
|
_reset();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
_reset();
|
|
super.dispose();
|
|
}
|
|
|
|
void _reset() {
|
|
_stopFirstTapUpTimer();
|
|
_firstTap = null;
|
|
_clearTrackers();
|
|
}
|
|
|
|
void _registerTap(_TapTracker tracker) {
|
|
GestureBinding.instance.gestureArena.hold(tracker.pointer);
|
|
// Note, order is important below in order for the clear -> reject logic to
|
|
// work properly.
|
|
}
|
|
|
|
void _clearTrackers() {
|
|
_trackers.values.toList().forEach(_reject);
|
|
assert(_trackers.isEmpty);
|
|
}
|
|
|
|
void _freezeTracker(_TapTracker tracker) {
|
|
tracker.stopTrackingPointer(_handleEvent);
|
|
}
|
|
|
|
void _startFirstTapDownTimer() {
|
|
_firstTapTimer ??= Timer(kDoubleTapTimeout, _timeoutCheck);
|
|
}
|
|
|
|
void _stopFirstTapUpTimer() {
|
|
if (_firstTapTimer != null) {
|
|
_firstTapTimer!.cancel();
|
|
_firstTapTimer = null;
|
|
}
|
|
}
|
|
|
|
void _timeoutCheck() {
|
|
_isStart = false;
|
|
if (_upTap.length == 2) {
|
|
_resolve();
|
|
} else {
|
|
_reset();
|
|
}
|
|
_upTap.clear();
|
|
}
|
|
|
|
void _resolve() {
|
|
// TODO tap down details
|
|
if (onDoubleFinerTap != null) {
|
|
onDoubleFinerTap!(TapDownDetails(
|
|
kind: _lastPointerDownEvent?.kind,
|
|
));
|
|
}
|
|
_trackers.forEach((key, value) {
|
|
value.entry.resolve(GestureDisposition.accepted);
|
|
});
|
|
_reset();
|
|
}
|
|
|
|
void _checkCancel() {
|
|
if (onDoubleFinerTapCancel != null) {
|
|
invokeCallback<void>('onHoldDragCancel', onDoubleFinerTapCancel!);
|
|
}
|
|
}
|
|
|
|
@override
|
|
String get debugDescription => 'double tap';
|
|
}
|
|
|
|
/// TapTracker helps track individual tap sequences as part of a
|
|
/// larger gesture.
|
|
class _TapTracker {
|
|
_TapTracker({
|
|
required PointerDownEvent event,
|
|
required this.entry,
|
|
required Duration doubleTapMinTime,
|
|
required this.gestureSettings,
|
|
}) : pointer = event.pointer,
|
|
_initialGlobalPosition = event.position,
|
|
initialButtons = event.buttons,
|
|
_doubleTapMinTimeCountdown =
|
|
_CountdownZoned(duration: doubleTapMinTime);
|
|
|
|
final DeviceGestureSettings? gestureSettings;
|
|
final int pointer;
|
|
final GestureArenaEntry entry;
|
|
final Offset _initialGlobalPosition;
|
|
final int initialButtons;
|
|
final _CountdownZoned _doubleTapMinTimeCountdown;
|
|
|
|
bool _isTrackingPointer = false;
|
|
|
|
void startTrackingPointer(PointerRoute route, Matrix4? transform) {
|
|
if (!_isTrackingPointer) {
|
|
_isTrackingPointer = true;
|
|
GestureBinding.instance.pointerRouter.addRoute(pointer, route, transform);
|
|
}
|
|
}
|
|
|
|
void stopTrackingPointer(PointerRoute route) {
|
|
if (_isTrackingPointer) {
|
|
_isTrackingPointer = false;
|
|
GestureBinding.instance.pointerRouter.removeRoute(pointer, route);
|
|
}
|
|
}
|
|
|
|
bool isWithinGlobalTolerance(PointerEvent event, double tolerance) {
|
|
final Offset offset = event.position - _initialGlobalPosition;
|
|
return offset.distance <= tolerance;
|
|
}
|
|
|
|
bool hasElapsedMinTime() {
|
|
return _doubleTapMinTimeCountdown.timeout;
|
|
}
|
|
|
|
bool hasSameButton(PointerDownEvent event) {
|
|
return event.buttons == initialButtons;
|
|
}
|
|
}
|
|
|
|
/// CountdownZoned tracks whether the specified duration has elapsed since
|
|
/// creation, honoring [Zone].
|
|
class _CountdownZoned {
|
|
_CountdownZoned({required Duration duration}) {
|
|
Timer(duration, _onTimeout);
|
|
}
|
|
|
|
bool _timeout = false;
|
|
|
|
bool get timeout => _timeout;
|
|
|
|
void _onTimeout() {
|
|
_timeout = true;
|
|
}
|
|
}
|
|
|
|
RawGestureDetector getMixinGestureDetector({
|
|
Widget? child,
|
|
GestureTapUpCallback? onTapUp,
|
|
GestureTapDownCallback? onDoubleTapDown,
|
|
GestureDoubleTapCallback? onDoubleTap,
|
|
GestureLongPressDownCallback? onLongPressDown,
|
|
GestureLongPressCallback? onLongPress,
|
|
GestureDragStartCallback? onHoldDragStart,
|
|
GestureDragUpdateCallback? onHoldDragUpdate,
|
|
GestureDragCancelCallback? onHoldDragCancel,
|
|
GestureDragEndCallback? onHoldDragEnd,
|
|
GestureTapDownCallback? onDoubleFinerTap,
|
|
GestureDragStartCallback? onOneFingerPanStart,
|
|
GestureDragUpdateCallback? onOneFingerPanUpdate,
|
|
GestureDragEndCallback? onOneFingerPanEnd,
|
|
GestureScaleUpdateCallback? onTwoFingerScaleUpdate,
|
|
GestureScaleEndCallback? onTwoFingerScaleEnd,
|
|
GestureDragUpdateCallback? onThreeFingerVerticalDragUpdate,
|
|
}) {
|
|
return RawGestureDetector(
|
|
child: child,
|
|
gestures: <Type, GestureRecognizerFactory>{
|
|
// Official
|
|
TapGestureRecognizer:
|
|
GestureRecognizerFactoryWithHandlers<TapGestureRecognizer>(
|
|
() => TapGestureRecognizer(), (instance) {
|
|
instance.onTapUp = onTapUp;
|
|
}),
|
|
DoubleTapGestureRecognizer:
|
|
GestureRecognizerFactoryWithHandlers<DoubleTapGestureRecognizer>(
|
|
() => DoubleTapGestureRecognizer(), (instance) {
|
|
instance
|
|
..onDoubleTapDown = onDoubleTapDown
|
|
..onDoubleTap = onDoubleTap;
|
|
}),
|
|
LongPressGestureRecognizer:
|
|
GestureRecognizerFactoryWithHandlers<LongPressGestureRecognizer>(
|
|
() => LongPressGestureRecognizer(), (instance) {
|
|
instance
|
|
..onLongPressDown = onLongPressDown
|
|
..onLongPress = onLongPress;
|
|
}),
|
|
// Customized
|
|
HoldTapMoveGestureRecognizer:
|
|
GestureRecognizerFactoryWithHandlers<HoldTapMoveGestureRecognizer>(
|
|
() => HoldTapMoveGestureRecognizer(),
|
|
(instance) => instance
|
|
..onHoldDragStart = onHoldDragStart
|
|
..onHoldDragUpdate = onHoldDragUpdate
|
|
..onHoldDragCancel = onHoldDragCancel
|
|
..onHoldDragEnd = onHoldDragEnd),
|
|
DoubleFinerTapGestureRecognizer: GestureRecognizerFactoryWithHandlers<
|
|
DoubleFinerTapGestureRecognizer>(
|
|
() => DoubleFinerTapGestureRecognizer(), (instance) {
|
|
instance.onDoubleFinerTap = onDoubleFinerTap;
|
|
}),
|
|
CustomTouchGestureRecognizer:
|
|
GestureRecognizerFactoryWithHandlers<CustomTouchGestureRecognizer>(
|
|
() => CustomTouchGestureRecognizer(), (instance) {
|
|
instance
|
|
..onOneFingerPanStart = onOneFingerPanStart
|
|
..onOneFingerPanUpdate = onOneFingerPanUpdate
|
|
..onOneFingerPanEnd = onOneFingerPanEnd
|
|
..onTwoFingerScaleUpdate = onTwoFingerScaleUpdate
|
|
..onTwoFingerScaleEnd = onTwoFingerScaleEnd
|
|
..onThreeFingerVerticalDragUpdate = onThreeFingerVerticalDragUpdate;
|
|
}),
|
|
});
|
|
}
|