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191 行
6.7 KiB

using System;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.gestures {
public delegate void GestureLongPressCallback();
public delegate void GestureLongPressUpCallback();
public delegate void GestureLongPressDragStartCallback(GestureLongPressDragStartDetails details);
public delegate void GestureLongPressDragUpdateCallback(GestureLongPressDragUpdateDetails details);
public delegate void GestureLongPressDragUpCallback(GestureLongPressDragUpDetails details);
public class GestureLongPressDragStartDetails {
public GestureLongPressDragStartDetails(
TimeSpan? sourceTimeStamp = null,
Offset globalPosition = null
) {
this.sourceTimeStamp = sourceTimeStamp;
this.globalPosition = globalPosition ?? Offset.zero;
}
public readonly TimeSpan? sourceTimeStamp;
public readonly Offset globalPosition;
}
public class GestureLongPressDragUpdateDetails {
public GestureLongPressDragUpdateDetails(
TimeSpan? sourceTimeStamp = null,
Offset globalPosition = null,
Offset offsetFromOrigin = null
) {
this.sourceTimeStamp = sourceTimeStamp;
this.globalPosition = globalPosition ?? Offset.zero;
this.offsetFromOrigin = offsetFromOrigin ?? Offset.zero;
}
public readonly TimeSpan? sourceTimeStamp;
public readonly Offset globalPosition;
public readonly Offset offsetFromOrigin;
}
public class GestureLongPressDragUpDetails {
public GestureLongPressDragUpDetails(
TimeSpan? sourceTimeStamp = null,
Offset globalPosition = null
) {
this.sourceTimeStamp = sourceTimeStamp;
this.globalPosition = globalPosition ?? Offset.zero;
}
public readonly TimeSpan? sourceTimeStamp;
public readonly Offset globalPosition;
}
public class LongPressGestureRecognizer : PrimaryPointerGestureRecognizer {
public LongPressGestureRecognizer(object debugOwner = null, PointerDeviceKind? kind = null) :
base(deadline: Constants.kLongPressTimeout, debugOwner: debugOwner, kind: kind) {
}
bool _longPressAccepted = false;
public GestureLongPressCallback onLongPress;
public GestureLongPressUpCallback onLongPressUp;
protected override void didExceedDeadline() {
this.resolve(GestureDisposition.accepted);
this._longPressAccepted = true;
if (this.onLongPress != null) {
this.invokeCallback<object>("onLongPress", () => {
this.onLongPress();
return null;
});
}
}
protected override void handlePrimaryPointer(PointerEvent evt) {
if (evt is PointerUpEvent) {
if (this._longPressAccepted && this.onLongPressUp != null) {
this._longPressAccepted = false;
this.invokeCallback<object>("onLongPressUp", () => {
this.onLongPressUp();
return null;
});
}
else {
this.resolve(GestureDisposition.rejected);
}
}
else if (evt is PointerDownEvent || evt is PointerCancelEvent) {
this._longPressAccepted = false;
}
}
public override string debugDescription {
get { return "long press"; }
}
}
public class LongPressDragGestureRecognizer : PrimaryPointerGestureRecognizer {
public LongPressDragGestureRecognizer(object debugOwner = null) : base(
deadline: Constants.kLongPressTimeout,
postAcceptSlopTolerance: null,
debugOwner: debugOwner
) {
}
bool _longPressAccepted = false;
Offset _longPressOrigin;
TimeSpan? _longPressStartTimestamp;
public GestureLongPressDragStartCallback onLongPressStart;
public GestureLongPressDragUpdateCallback onLongPressDragUpdate;
public GestureLongPressDragUpCallback onLongPressUp;
protected override void didExceedDeadline() {
this.resolve(GestureDisposition.accepted);
this._longPressAccepted = true;
base.acceptGesture(this.primaryPointer);
if (this.onLongPressStart != null) {
this.invokeCallback<object>("onLongPressStart", () => {
this.onLongPressStart(new GestureLongPressDragStartDetails(
sourceTimeStamp: this._longPressStartTimestamp,
globalPosition: this._longPressOrigin
));
return null;
});
}
}
protected override void handlePrimaryPointer(PointerEvent e) {
if (e is PointerUpEvent) {
if (this._longPressAccepted == true && this.onLongPressUp != null) {
this._longPressAccepted = false;
this.invokeCallback<object>("onLongPressUp", () => {
this.onLongPressUp(new GestureLongPressDragUpDetails(
sourceTimeStamp: e.timeStamp,
globalPosition: e.position
));
return null;
});
}
else {
this.resolve(GestureDisposition.rejected);
}
}
else if (e is PointerDownEvent) {
this._longPressAccepted = false;
this._longPressStartTimestamp = e.timeStamp;
this._longPressOrigin = e.position;
}
else if (e is PointerMoveEvent && this._longPressAccepted && this.onLongPressDragUpdate != null) {
this.invokeCallback<object>("onLongPressDrag", () => {
this.onLongPressDragUpdate(new GestureLongPressDragUpdateDetails(
sourceTimeStamp: e.timeStamp,
globalPosition: e.position,
offsetFromOrigin: e.position - this._longPressOrigin
));
return null;
});
}
}
public override void acceptGesture(int pointer) {
}
protected override void didStopTrackingLastPointer(int pointer) {
this._longPressAccepted = false;
this._longPressOrigin = null;
this._longPressStartTimestamp = null;
base.didStopTrackingLastPointer(pointer);
}
public override string debugDescription {
get { return "long press drag"; }
}
}
}