/// <summary>
/// Release resources.
/// </summary>
public void Dispose()
{
_hintToTarget.Clear();
_hintToTarget = null;
if (_indicators != null)
{
IDisposable dispose = _indicators as IDisposable;
dispose.Dispose();
_indicators = null;
}
}
/// <summary>
/// Update visual feedback based on the current screen position of the mouse.
/// </summary>
/// <param name="screenPt">Latest mouse screen position.</param>
/// <param name="dragFeedback">Type of drag feedback required.</param>
public DragTarget Feedback(Point screenPt, PaletteDragFeedback dragFeedback)
{
if (ScreenRect.Contains(screenPt))
{
// Create the docking indicators the first time needed
if (_indicators == null)
{
switch (dragFeedback)
{
case PaletteDragFeedback.Rounded:
_indicators = new DropDockingIndicatorsRounded(_paletteDragDrop, _renderer,
_hintToTarget.ContainsKey(DragTargetHint.EdgeLeft),
_hintToTarget.ContainsKey(DragTargetHint.EdgeRight),
_hintToTarget.ContainsKey(DragTargetHint.EdgeTop),
_hintToTarget.ContainsKey(DragTargetHint.EdgeBottom),
_hintToTarget.ContainsKey(DragTargetHint.Transfer));
break;
case PaletteDragFeedback.Square:
default:
_indicators = new DropDockingIndicatorsSquare(_paletteDragDrop, _renderer,
_hintToTarget.ContainsKey(DragTargetHint.EdgeLeft),
_hintToTarget.ContainsKey(DragTargetHint.EdgeRight),
_hintToTarget.ContainsKey(DragTargetHint.EdgeTop),
_hintToTarget.ContainsKey(DragTargetHint.EdgeBottom),
_hintToTarget.ContainsKey(DragTargetHint.Transfer));
break;
}
}
// Ensure window is displayed in correct location
_indicators.ShowRelative(ScreenRect);
// Hit test against indicators and update display
switch (_indicators.ScreenMouseMove(screenPt))
{
case 0x0040:
return(_hintToTarget[DragTargetHint.EdgeLeft]);
case 0x0080:
return(_hintToTarget[DragTargetHint.EdgeRight]);
case 0x0100:
return(_hintToTarget[DragTargetHint.EdgeTop]);
case 0x0200:
return(_hintToTarget[DragTargetHint.EdgeBottom]);
case 0x0400:
return(_hintToTarget[DragTargetHint.Transfer]);
default:
// Mouse is not over any of the targets
return(null);
}
}
else
{
if (_indicators != null)
{
_indicators.MouseReset();
_indicators.Hide();
}
// Mouse is not over any of the targets
return(null);
}
}
