/// <summary>
/// Initialize the drag/drop when the diagram is associated with a view (i.e. when
/// a model is loaded from a file)
/// </summary>
protected override void OnAssociated(DiagramAssociationEventArgs e)
{
base.OnAssociated(e);
// Ensure we have a view
if (e.DiagramView == null || e.DiagramView.DiagramClientView == null)
{
return;
}
// Wireup the drag/drop support
Control ctrl = e.DiagramView.DiagramClientView;
ctrl.AllowDrop = true;
ctrl.DragOver += OnDragOver;
ctrl.DragDrop += OnDragDrop;
}
/// <summary>
/// Initialize the drag/drop when the diagram is associated with a view (i.e. when
/// a model is loaded from a file)
/// </summary>
protected override void OnAssociated(DiagramAssociationEventArgs e)
{
base.OnAssociated(e);
// Ensure we have a view
if (e.DiagramView == null || e.DiagramView.DiagramClientView == null)
{
return;
}
// Wireup the drag/drop support
Control ctrl = e.DiagramView.DiagramClientView;
ctrl.AllowDrop = true;
ctrl.DragOver += new DragEventHandler(OnDragOver);
ctrl.DragDrop += new DragEventHandler(OnDragDrop);
}
/// <summary>
/// Unsubscribe to the shape selection changed event when view is about to be disposed.
/// </summary>
protected override void OnDisassociated(DiagramAssociationEventArgs e)
{
if (e.DiagramView != null
&& e.DiagramView.Selection != null)
{
e.DiagramView.Selection.ShapeSelectionChanged -= diagramView_OnShapeSelectionChanged;
}
base.OnDisassociated(e);
}
protected override void OnAssociated(DiagramAssociationEventArgs e)
{
base.OnAssociated(e);
// Initialize and add LinkLabels to diagram watermark
if (e.DiagramView != null)
{
// OnAssociated gets called when the document gets loaded as well as reloaded. This means that
// we need to reset the watermark before we refresh the link labels associated with them.
// Resetting the watermark does the appropriate steps to check if the artifact is designer safe, etc.
// to determine what watermark to display.
if (e.DiagramView.Watermark != null)
{
ResetWatermark(e.DiagramView);
}
Debug.Assert(e.DiagramView.Selection != null, "Why DiagramView's Selection property is null?");
if (e.DiagramView.Selection != null)
{
e.DiagramView.Selection.ShapeSelectionChanged += diagramView_OnShapeSelectionChanged;
}
}
}
