protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
_startPointClick = e.GetPosition(this);
var element = GetElement(_startPointClick);
if (element == null)
{
if (e.ClickCount == 2)
{
_graphViewModel.AddVertex(_startPointClick);
return;
}
if (!Keyboard.IsKeyDown(Key.RightCtrl) && !Keyboard.IsKeyDown(Key.LeftCtrl))
{
_graphViewModel.UnselectElements();
}
}
// Select element
else
{
if (!_graphViewModel.SelectedElements.Contains(element.Id))
{
AddSelectedElement(element, false);
}
_targetUiElement = element;
}
CaptureMouse();
base.OnMouseLeftButtonDown(e);
}
