private static void ElementMouseDown(object sender, MouseButtonEventArgs e)
{
DragMouseButton dragMouseButton = (DragMouseButton)((DependencyObject)sender).GetValue(Advent.Common.UI.DragDrop.DragMouseButtonProperty);
if (dragMouseButton == DragMouseButton.None || e.ChangedButton != (MouseButton)dragMouseButton || e.ButtonState != MouseButtonState.Pressed)
{
return;
}
Advent.Common.UI.DragDrop.isDragging = true;
Advent.Common.UI.DragDrop.dragPoint = e.GetPosition((IInputElement)sender);
}
private static void OnDragMouseButtonChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
UIElement uiElement = (UIElement)obj;
DragMouseButton dragMouseButton = (DragMouseButton)args.NewValue;
if ((DragMouseButton)args.OldValue == DragMouseButton.None)
{
uiElement.MouseDown += new MouseButtonEventHandler(Advent.Common.UI.DragDrop.ElementMouseDown);
uiElement.MouseMove += new MouseEventHandler(Advent.Common.UI.DragDrop.ElementMouseMove);
uiElement.MouseUp += new MouseButtonEventHandler(Advent.Common.UI.DragDrop.ElementMouseUp);
}
else
{
if (dragMouseButton != DragMouseButton.None)
{
return;
}
uiElement.MouseDown -= new MouseButtonEventHandler(Advent.Common.UI.DragDrop.ElementMouseDown);
uiElement.MouseMove -= new MouseEventHandler(Advent.Common.UI.DragDrop.ElementMouseMove);
uiElement.MouseUp -= new MouseButtonEventHandler(Advent.Common.UI.DragDrop.ElementMouseUp);
}
}
public static void SetDragMouseButton(DependencyObject element, DragMouseButton button)
{
element.SetValue(Advent.Common.UI.DragDrop.DragMouseButtonProperty, (object)button);
}