private void DragDropContainer_TouchMove(object sender, TouchEventArgs e, GalaxyAdorner adorner)
{
var touchPosition = e.GetTouchPoint(DragOverlay);
var adornerLocation = new Point(touchPosition.Position.X, touchPosition.Position.Y);
adorner.UpdatePosition(adornerLocation);
}
private void DragDropContainer_TouchUp(object sender, TouchEventArgs e, GalaxyAdorner adorner, UIElement element)
{
var touchPosition = e.GetTouchPoint(DragOverlay);
Point touchPoint = new Point(touchPosition.Position.X, touchPosition.Position.Y);
bool TouchUpIsOverAdorner = touchPoint.X >= adorner.Location.X && touchPoint.X <= adorner.Location.X + adorner.ActualWidth &&
touchPoint.Y >= adorner.Location.Y && touchPoint.Y <= adorner.Location.Y + adorner.ActualHeight;
if (TouchUpIsOverAdorner)
{
AdornerLayer.GetAdornerLayer(sender as Visual).Remove(adorner);
CheckAndExecuteDrop(adorner, touchPoint);
}
}
private void CheckAndExecuteDrop(GalaxyAdorner adorner, Point touchPoint)
{
VisualTreeHelper.HitTest(DragOverlay, null,
new HitTestResultCallback(MyHitTestResult),
new PointHitTestParameters(touchPoint));
foreach (UIElement item in hitResultsList)
{
if (item is IDroppableArea)
{
IDroppableArea area = item as IDroppableArea;
area.Drop(adorner);
}
}
hitResultsList.Clear();
}
private void ConstructGhostAdornerWithHandlers(Point initialPoint, FrameworkElement adornedElement, TouchEventArgs e)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(adornedElement);
GalaxyAdorner adorner = new GalaxyAdorner(adornedElement, initialPoint);
if (adornerLayer != null && adorner != null)
{
adornerLayer.Add(adorner);
}
else
{
return;
}
EventHandler <TouchEventArgs> moveHandler = new EventHandler <TouchEventArgs>((s, evt) => DragDropContainer_TouchMove(s, e, adorner));
EventHandler <TouchEventArgs> upHandler = new EventHandler <TouchEventArgs>((s, evt) => DragDropContainer_TouchUp(s, evt, adorner, adornedElement));
EventHandler <TouchEventArgs> unsubscribeHandler = new EventHandler <TouchEventArgs>((s, evt) => DragDropContainer_Unsubscribe(s, e, moveHandler, upHandler, adorner));
adorner.UnsubscribeEvent = unsubscribeHandler;
DragOverlay.TouchMove += moveHandler;
DragOverlay.TouchUp += upHandler;
DragOverlay.TouchUp += unsubscribeHandler;
}
private void DragDropContainer_Unsubscribe(object s, TouchEventArgs e, EventHandler <TouchEventArgs> moveHandler, EventHandler <TouchEventArgs> upHandler, GalaxyAdorner adorner)
{
if (adorner.Parent == null)
{
DragOverlay.TouchMove -= moveHandler;
DragOverlay.TouchUp -= upHandler;
DragOverlay.TouchUp -= adorner.UnsubscribeEvent;
}
}
