protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (!IsDragging && Interaction.AllowMouseLeftButtonDown(e))
{
e.Handled = true;
CaptureMouse();
IsDragging = true;
Debug.Assert(this.Parent is UIElement);
_origin = _previousPosition = e.GetPosition((UIElement)this.Parent);
// Raise the DragStarted event
bool success = false;
try
{
DragStartedEventHandler handler = DragStarted;
if (handler != null)
{
handler(this, new DragStartedEventArgs(_origin.X, _origin.Y));
}
success = true;
}
finally
{
// Cancel the drag if the DragStarted handler failed
if (!success)
{
CancelDrag();
}
Interaction.OnMouseLeftButtonDownBase();
}
}
}
/// <summary>
/// Provides handling for the MouseLeftButtonDown event.
/// </summary>
/// <param name="e">The data for the event.</param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (_interaction.AllowMouseLeftButtonDown(e))
{
_interaction.OnMouseLeftButtonDownBase();
base.OnMouseLeftButtonDown(e);
}
}
/// <summary>
/// Overriding the handler for the MouseLeftButtonDown event.
/// </summary>
/// <param name="e">MouseButtonEventArgs.</param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (Interaction.AllowMouseLeftButtonDown(e))
{
Interaction.OnMouseLeftButtonDownBase();
if (ClickMode != ClickMode.Hover)
{
StartTimer();
}
}
}
