/// <summary>
/// First determine whether the drag data is supported.
/// Second determine whether or not a Move can be done.
/// And finally handle the actual drop when <code>bDrop</code> is true.
/// </summary>
/// <param name="bDrop">True to perform an actual drop, otherwise just return e.Effects</param>
/// <param name="sender">DragDrop event <code>sender</code></param>
/// <param name="e">DragDrop event arguments</param>
private void DragOverOrDrop(bool bDrop, object sender, DragEventArgs e)
{
ToolBarDataProvider <TContainer, TObject> dataProvider = this.GetData(e) as ToolBarDataProvider <TContainer, TObject>;
if (dataProvider != null)
{
TContainer dragSourceContainer = dataProvider.SourceContainer as TContainer;
TObject dragSourceObject = dataProvider.SourceObject as TObject;
if (dragSourceObject == null)
{
dragSourceObject = Utilities.FindParentControlIncludingMe <TObject>(dataProvider.SourceObject as DependencyObject);
}
Debug.Assert(dragSourceObject != null);
Debug.Assert(dragSourceContainer != null);
Panel dropContainer = sender as Panel;
if (dropContainer != null)
{
if (bDrop)
{
dataProvider.Unparent();
Point containerPoint = e.GetPosition(dropContainer);
Point objectPoint = dataProvider.StartPosition;
#if REUSE_SAME_BUTTON //|| true
dropContainer.Children.Add(dragSourceObject);
Canvas.SetLeft(dragSourceObject, containerPoint.X - objectPoint.X);
Canvas.SetTop(dragSourceObject, containerPoint.Y - objectPoint.Y);
#else
Button oldButton = dragSourceObject as Button;
Button newButton = new Button();
newButton.Content = Utilities.CloneElement(oldButton.Content);
newButton.ToolTip = oldButton.ToolTip;
dropContainer.Children.Add(newButton);
Canvas.SetLeft(newButton, containerPoint.X - objectPoint.X);
Canvas.SetTop(newButton, containerPoint.Y - objectPoint.Y);
#endif
}
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
else
{
e.Effects = DragDropEffects.None;
e.Handled = true;
}
}
}
/// <summary>
/// First determine whether the drag data is supported.
/// Second determine what operation to do (move, link).
/// And finally handle the actual drop when <code>bDrop</code> is true.
/// Insert the button if the target is another button, otherwise
/// just add it to the end of the list.
/// </summary>
/// <param name="bDrop">True to perform an actual drop, otherwise just return e.Effects</param>
/// <param name="sender">DragDrop event <code>sender</code></param>
/// <param name="e">DragDrop event arguments</param>
private void DragOverOrDrop(bool bDrop, object sender, DragEventArgs e)
{
ToolBarDataProvider <TContainer, TObject> dataProvider = this.GetData(e) as ToolBarDataProvider <TContainer, TObject>;
if (dataProvider != null)
{
TContainer dragSourceContainer = dataProvider.SourceContainer as TContainer;
TObject dragSourceObject = dataProvider.SourceObject as TObject;
Debug.Assert(dragSourceObject != null);
Debug.Assert(dragSourceContainer != null);
TContainer dropContainer = sender as TContainer;
TObject dropTarget = e.Source as TObject;
if (dropTarget == null)
{
dropTarget = Utilities.FindParentControlExcludingMe <TObject>(e.Source as DependencyObject);
}
if (dropContainer != null)
{
if (bDrop)
{
dataProvider.Unparent();
if (dropTarget == null)
{
dropContainer.Items.Add(dragSourceObject);
}
else
{
dropContainer.Items.Insert(dropContainer.Items.IndexOf(dropTarget), dragSourceObject);
}
}
e.Effects = (dropTarget == null) ? DragDropEffects.Move : DragDropEffects.Link;
e.Handled = true;
}
else
{
e.Effects = DragDropEffects.None;
e.Handled = true;
}
}
}