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Code Issues Packages Projects Releases Wiki Activity

chapter switching gesture

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nyne
2024-10-30 20:15:50 +08:00
parent 7ce84d095e
commit 3e1bb5ef5c
3 changed files with 148 additions and 55 deletions
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43
lib/pages/reader/gesture.dart
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@@ -12,14 +12,16 @@ class _ReaderGestureDetector extends StatefulWidget {
class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
late TapGestureRecognizer _tapGestureRecognizer;
static const _kDoubleTapMinTime = Duration(milliseconds: 200);
static const _kDoubleTapMaxTime = Duration(milliseconds: 200);
static const _kLongPressMinTime = Duration(milliseconds: 200);
static const _kLongPressMinTime = Duration(milliseconds: 250);
static const _kDoubleTapMaxDistanceSquared = 20.0 * 20.0;
static const _kTapToTurnPagePercent = 0.3;
_DragListener? dragListener;
@override
void initState() {
_tapGestureRecognizer = TapGestureRecognizer()
@@ -28,6 +30,7 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
onSecondaryTapUp(details.globalPosition);
};
super.initState();
context.readerScaffold._gestureDetectorState = this;
}
@override
@@ -38,11 +41,20 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
_lastTapPointer = event.pointer;
_lastTapMoveDistance = Offset.zero;
_tapGestureRecognizer.addPointer(event);
if(_dragInProgress) {
dragListener?.onEnd?.call();
_dragInProgress = false;
}
Future.delayed(_kLongPressMinTime, () {
if (_lastTapPointer == event.pointer &&
_lastTapMoveDistance!.distanceSquared < 20.0 * 20.0) {
onLongPressedDown(event.position);
_longPressInProgress = true;
if (_lastTapPointer == event.pointer) {
if(_lastTapMoveDistance!.distanceSquared < 20.0 * 20.0) {
onLongPressedDown(event.position);
_longPressInProgress = true;
} else {
_dragInProgress = true;
dragListener?.onStart?.call(event.position);
dragListener?.onMove?.call(_lastTapMoveDistance!);
}
}
});
},
@@ -50,11 +62,18 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
if (event.pointer == _lastTapPointer) {
_lastTapMoveDistance = event.delta + _lastTapMoveDistance!;
}
if(_dragInProgress) {
dragListener?.onMove?.call(event.delta);
}
},
onPointerUp: (event) {
if (_longPressInProgress) {
onLongPressedUp(event.position);
}
if(_dragInProgress) {
dragListener?.onEnd?.call();
_dragInProgress = false;
}
_lastTapPointer = null;
_lastTapMoveDistance = null;
},
@@ -89,6 +108,8 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
bool _longPressInProgress = false;
bool _dragInProgress = false;
void onTapUp(TapUpDetails event) {
if (_longPressInProgress) {
_longPressInProgress = false;
@@ -107,7 +128,7 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
}
}
_previousEvent = event;
Future.delayed(_kDoubleTapMinTime, () {
Future.delayed(_kDoubleTapMaxTime, () {
if (_previousEvent == event) {
onTap(location);
_previousEvent = null;
@@ -222,3 +243,11 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
context.reader._imageViewController?.handleLongPressDown(location);
}
}
class _DragListener {
void Function(Offset point)? onStart;
void Function(Offset offset)? onMove;
void Function()? onEnd;
_DragListener({this.onStart, this.onMove, this.onEnd});
}