/// <summary>
/// Shows adorners over the selected element
/// </summary>
private void activateAdorners(object sender, MouseEventArgs e)
{
if (_isDragging)
{
return;
}
clearAdorners();
var border = sender as Border;
if (border == null)
{
return;
}
var adornerLayers = AdornerLayer.GetAdornerLayer(border);
var adorner = new SimpleAdorner(border);
adorner.dragStarted += onDragStarted;
adorner.centerDragging += onCenterAdornerDragging;
adorner.edgeDragging += onEdgeAdornerDragging;
adorner.dragCompleted += onDragCompleted;
adornerLayers?.Add(adorner);
}
/// <summary>
/// Initiates a drag and drop session.
/// </summary>
private void DragStarted()
{
_isDragging = true;
_dragAdornment = new SimpleAdorner(_dragElement);
AdornerLayer layer = AdornerLayer.GetAdornerLayer(_dragElement);
layer.Add(_dragAdornment);
}
/// <summary>
/// Initiates a drag and drop session.
/// </summary>
private void DragStarted()
{
_isDragging = true;
_dragAdornment = new SimpleAdorner(_dragElement);
AdornerLayer layer = AdornerLayer.GetAdornerLayer(_dragElement);
layer.Add(_dragAdornment);
}
/// <summary>
/// Completes a drag and drop either cancelling it or committing it.
/// </summary>
private void DragFinished(bool cancelled, Point? dropPoint)
{
Mouse.Capture(null);
if (_isDragging) {
AdornerLayer.GetAdornerLayer(_dragAdornment.AdornedElement).Remove(_dragAdornment);
if (cancelled == false) {
if (_dropAction != null) {
_dropAction(dropPoint.Value);
_dropAction = null;
}
//Canvas.SetTop(_dragElement, _dragTop + _overlayElement.TopOffset);
//Canvas.SetLeft(_dragElement, _dragLeft + _overlayElement.LeftOffset);
// commit result
}
_dragAdornment = null;
}
_isDragging = false;
_isMouseDown = false;
}