//....................................................................
void OnDragStarted(MouseButtonEventArgs e)
{
Grid.CaptureMouse();
StartPoint = e.GetPosition(Grid);
IsDragging = true;
if (!ModifierKeys.Control.IsPressed() && !ModifierKeys.Shift.IsPressed())
{
Selections.TryClear();
}
PreviousSelection = new Rect();
}
void OnDragEnded(MouseButtonEventArgs e)
{
IsDragging = false;
if (Grid.IsMouseCaptured)
{
Grid.ReleaseMouseCapture();
}
if (!Selections.TryAdd(PreviousSelection))
{
Selections.TryClear();
}
Selection.Set(new Rect(0, 0, 0, 0));
StartPoint = default(Point);
}
