public TextSelectionGestureDetector(
Key key = null,
GestureTapDownCallback onTapDown = null,
GestureForcePressStartCallback onForcePressStart = null,
GestureForcePressEndCallback onForcePressEnd = null,
GestureTapUpCallback onSingleTapUp = null,
GestureTapCancelCallback onSingleTapCancel = null,
GestureLongPressStartCallback onSingleLongTapStart = null,
GestureLongPressMoveUpdateCallback onSingleLongTapMoveUpdate = null,
GestureLongPressEndCallback onSingleLongTapEnd = null,
GestureTapDownCallback onDoubleTapDown = null,
GestureDragStartCallback onDragSelectionStart = null,
DragSelectionUpdateCallback onDragSelectionUpdate = null,
GestureDragEndCallback onDragSelectionEnd = null,
HitTestBehavior?behavior = null,
Widget child = null
) : base(key: key)
{
D.assert(child != null);
this.onTapDown = onTapDown;
this.onForcePressEnd = onForcePressEnd;
this.onForcePressStart = onForcePressStart;
this.onSingleTapUp = onSingleTapUp;
this.onSingleTapCancel = onSingleTapCancel;
this.onSingleLongTapStart = onSingleLongTapStart;
this.onDoubleTapDown = onDoubleTapDown;
this.onDragSelectionStart = onDragSelectionStart;
this.onDragSelectionUpdate = onDragSelectionUpdate;
this.onDragSelectionEnd = onDragSelectionEnd;
this.behavior = behavior;
this.child = child;
}
public override Widget build(BuildContext context)
{
Dictionary <Type, GestureRecognizerFactory> gestures = new Dictionary <Type, GestureRecognizerFactory>();
gestures.Add(typeof(_TransparentTapGestureRecognizer), new GestureRecognizerFactoryWithHandlers <_TransparentTapGestureRecognizer>(
() => new _TransparentTapGestureRecognizer(debugOwner: this),
(_TransparentTapGestureRecognizer instance) => {
instance.onTapDown = _handleTapDown;
instance.onTapUp = _handleTapUp;
instance.onTapCancel = _handleTapCancel;
}
)
);
if (widget.onSingleLongTapStart != null ||
widget.onSingleLongTapMoveUpdate != null ||
widget.onSingleLongTapEnd != null
)
{
gestures[typeof(LongPressGestureRecognizer)] =
new GestureRecognizerFactoryWithHandlers <LongPressGestureRecognizer>(
() => new LongPressGestureRecognizer(debugOwner: this, kind: PointerDeviceKind.touch),
instance => {
instance.onLongPressStart = _handleLongPressStart;
instance.onLongPressMoveUpdate = _handleLongPressMoveUpdate;
instance.onLongPressEnd = _handleLongPressEnd;
});
}
if (widget.onDragSelectionStart != null ||
widget.onDragSelectionUpdate != null ||
widget.onDragSelectionEnd != null)
{
gestures.Add(typeof(HorizontalDragGestureRecognizer),
new GestureRecognizerFactoryWithHandlers <HorizontalDragGestureRecognizer>(
() => new HorizontalDragGestureRecognizer(debugOwner: this, kind: PointerDeviceKind.mouse),
instance => {
instance.dragStartBehavior = DragStartBehavior.down;
instance.onStart = _handleDragStart;
instance.onUpdate = _handleDragUpdate;
instance.onEnd = _handleDragEnd;
}
)
);
}
if (widget.onForcePressStart != null || widget.onForcePressEnd != null)
{
GestureForcePressStartCallback startInstance = null;
if (widget.onForcePressStart != null)
{
startInstance = _forcePressStarted;
}
GestureForcePressEndCallback endInstance = null;
if (widget.onForcePressEnd != null)
{
endInstance = _forcePressEnded;
}
gestures[typeof(ForcePressGestureRecognizer)] = new GestureRecognizerFactoryWithHandlers <ForcePressGestureRecognizer>(
() => new ForcePressGestureRecognizer(debugOwner: this),
(ForcePressGestureRecognizer instance) => {
instance.onStart = startInstance;
instance.onEnd = endInstance;
}
);
}
return(new RawGestureDetector(
gestures: gestures,
behavior: widget.behavior,
child: widget.child
));
}
public GestureDetector(
Key key = null,
Widget child = null,
GestureTapDownCallback onTapDown = null,
GestureTapUpCallback onTapUp = null,
GestureTapCallback onTap = null,
GestureTapCancelCallback onTapCancel = null,
GestureTapDownCallback onSecondaryTapDown = null,
GestureTapUpCallback onSecondaryTapUp = null,
GestureTapCancelCallback onSecondaryTapCancel = null,
GestureDoubleTapCallback onDoubleTap = null,
GestureLongPressCallback onLongPress = null,
GestureLongPressStartCallback onLongPressStart = null,
GestureLongPressMoveUpdateCallback onLongPressMoveUpdate = null,
GestureLongPressUpCallback onLongPressUp = null,
GestureLongPressEndCallback onLongPressEnd = null,
GestureDragDownCallback onVerticalDragDown = null,
GestureDragStartCallback onVerticalDragStart = null,
GestureDragUpdateCallback onVerticalDragUpdate = null,
GestureDragEndCallback onVerticalDragEnd = null,
GestureDragCancelCallback onVerticalDragCancel = null,
GestureDragDownCallback onHorizontalDragDown = null,
GestureDragStartCallback onHorizontalDragStart = null,
GestureDragUpdateCallback onHorizontalDragUpdate = null,
GestureDragEndCallback onHorizontalDragEnd = null,
GestureDragCancelCallback onHorizontalDragCancel = null,
GestureForcePressStartCallback onForcePressStart = null,
GestureForcePressPeakCallback onForcePressPeak = null,
GestureForcePressUpdateCallback onForcePressUpdate = null,
GestureForcePressEndCallback onForcePressEnd = null,
GestureDragDownCallback onPanDown = null,
GestureDragStartCallback onPanStart = null,
GestureDragUpdateCallback onPanUpdate = null,
GestureDragEndCallback onPanEnd = null,
GestureDragCancelCallback onPanCancel = null,
GestureScaleStartCallback onScaleStart = null,
GestureScaleUpdateCallback onScaleUpdate = null,
GestureScaleEndCallback onScaleEnd = null,
HitTestBehavior behavior = HitTestBehavior.deferToChild,
DragStartBehavior dragStartBehavior = DragStartBehavior.down
) : base(key)
{
D.assert(() => {
bool haveVerticalDrag =
onVerticalDragStart != null || onVerticalDragUpdate != null ||
onVerticalDragEnd != null;
bool haveHorizontalDrag =
onHorizontalDragStart != null || onHorizontalDragUpdate != null ||
onHorizontalDragEnd != null;
bool havePan = onPanStart != null || onPanUpdate != null || onPanEnd != null;
bool haveScale = onScaleStart != null || onScaleUpdate != null || onScaleEnd != null;
if (havePan || haveScale)
{
if (havePan && haveScale)
{
throw new UIWidgetsError(new List <DiagnosticsNode> {
new ErrorSummary("Incorrect GestureDetector arguments."),
new ErrorDescription(
"Having both a pan gesture recognizer and a scale gesture recognizer is redundant; scale is a superset of pan."
),
new ErrorHint("Just use the scale gesture recognizer.")
});
}
string recognizer = havePan ? "pan" : "scale";
if (haveVerticalDrag && haveHorizontalDrag)
{
throw new UIWidgetsError(
"Incorrect GestureDetector arguments.\n" +
$"Simultaneously having a vertical drag gesture recognizer, a horizontal drag gesture recognizer, and a {recognizer} gesture recognizer " +
$"will result in the {recognizer} gesture recognizer being ignored, since the other two will catch all drags."
);
}
}
return(true);
});
this.child = child;
this.onTapDown = onTapDown;
this.onTapUp = onTapUp;
this.onTap = onTap;
this.onTapCancel = onTapCancel;
this.onSecondaryTapDown = onSecondaryTapDown;
this.onSecondaryTapUp = onSecondaryTapUp;
this.onSecondaryTapCancel = onSecondaryTapCancel;
this.onDoubleTap = onDoubleTap;
this.onLongPress = onLongPress;
this.onLongPressUp = onLongPressUp;
this.onLongPressStart = onLongPressStart;
this.onLongPressMoveUpdate = onLongPressMoveUpdate;
this.onLongPressEnd = onLongPressEnd;
this.onVerticalDragDown = onVerticalDragDown;
this.onVerticalDragStart = onVerticalDragStart;
this.onVerticalDragUpdate = onVerticalDragUpdate;
this.onVerticalDragEnd = onVerticalDragEnd;
this.onVerticalDragCancel = onVerticalDragCancel;
this.onHorizontalDragDown = onHorizontalDragDown;
this.onHorizontalDragStart = onHorizontalDragStart;
this.onHorizontalDragUpdate = onHorizontalDragUpdate;
this.onHorizontalDragEnd = onHorizontalDragEnd;
this.onHorizontalDragCancel = onHorizontalDragCancel;
this.onForcePressEnd = onForcePressEnd;
this.onForcePressPeak = onForcePressPeak;
this.onForcePressStart = onForcePressStart;
this.onForcePressUpdate = onForcePressUpdate;
this.onPanDown = onPanDown;
this.onPanStart = onPanStart;
this.onPanUpdate = onPanUpdate;
this.onPanEnd = onPanEnd;
this.onPanCancel = onPanCancel;
this.onScaleStart = onScaleStart;
this.onScaleUpdate = onScaleUpdate;
this.onScaleEnd = onScaleEnd;
this.behavior = behavior;
this.dragStartBehavior = dragStartBehavior;
}