private void PrepareActionContent()
{
DragPositionMode dragMode = DragDrop.GetDragPositionMode(this);
ContentControl swipeActionContentControl = this.ListView.swipeActionContentControl;
swipeActionContentControl.DataContext = this.DataContext;
if (dragMode.HasFlag(DragPositionMode.RailXForward) || dragMode.HasFlag(DragPositionMode.RailXBackwards))
{
swipeActionContentControl.Width = this.ActualWidth;
swipeActionContentControl.Height = this.ActualHeight;
Canvas.SetLeft(swipeActionContentControl, 0);
Canvas.SetTop(swipeActionContentControl, Canvas.GetTop(this));
}
else
{
swipeActionContentControl.Width = this.ActualWidth;
swipeActionContentControl.Height = this.ActualHeight;
Canvas.SetLeft(swipeActionContentControl, Canvas.GetLeft(this));
Canvas.SetTop(swipeActionContentControl, 0);
}
swipeActionContentControl.Margin = this.Margin;
swipeActionContentControl.Visibility = Visibility.Visible;
swipeActionContentControl.Tapped += this.SwipeActionContentControl_Tapped;
this.ListView.isActionContentDisplayed = true;
}
private Point GetRestrictedPosition(Point pointerPosition, DragPositionMode positionRestriction)
{
Point result = pointerPosition;
switch (positionRestriction)
{
case DragPositionMode.RailX:
result = new Point(pointerPosition.X, this.startDragPosition.Y);
break;
case DragPositionMode.RailY:
result = new Point(this.startDragPosition.X, pointerPosition.Y);
break;
case DragPositionMode.Free:
default:
break;
}
return(result);
}
public static void SetDragPositionMode(DependencyObject obj, DragPositionMode value)
{
obj.SetValue(DragPositionModeProperty, value);
}
public DragDropOperation(DragStartingContext startContext, IDragDropElement source, DragPositionMode positionMode, Pointer pointer, Point startClickPosition, Point relativeStartPosition)
{
this.sourceElement = source;
this.dragSurface = startContext.DragSurface;
this.dragContext = new DragContext(startContext.Payload, this);
this.hitTestStrategy = startContext.HitTestStrategy ?? new DragHitTestStrategy(this.dragSurface.RootElement);
this.dragVisualContext = this.dragSurface.CreateDragContext();
this.dragVisualContext.DragStartPosition = new Point(startClickPosition.X - relativeStartPosition.X, startClickPosition.Y - relativeStartPosition.Y);
this.dragVisualContext.PositionRestriction = positionMode;
this.dragVisualContext.PrepareDragVisual(startContext.DragVisual);
this.startDragPosition = startClickPosition;
this.relativeStartPosition = relativeStartPosition;
this.InitializeVisual();
this.dragVisualContext.DragVisualHost.PointerMoved += this.DragVisualHost_PointerMoved;
this.dragVisualContext.DragVisualHost.PointerReleased += this.DragVisualHost_PointerReleased;
this.dragVisualContext.DragVisualHost.PointerCaptureLost += this.DragVisualHost_PointerCaptureLost;
if (this.dragVisualContext.DragVisualHost.CapturePointer(pointer))
{
this.capturedPointer = pointer;
this.originalFocusedElement = FocusManager.GetFocusedElement() as Control;
if (this.originalFocusedElement != null)
{
this.originalFocusState = this.originalFocusedElement.FocusState;
}
((Control)this.dragVisualContext.DragVisualHost).Focus(FocusState.Programmatic);
}
else
{
this.CancelDrag();
}
this.dragSurface.RootElement.KeyDown += this.RootElement_KeyDown;
}
