private void HandleArrowKey(KeyEventArgs e, Keys modifierKeys)
{
IEnumerable <IDrawable> selectedShapes = _canvas.Drawables.SelectedShapes;
if (selectedShapes.Any())
{
MovementType movementType;
switch (e.KeyCode)
{
case Keys.Up:
movementType = MovementType.Up;
break;
case Keys.Down:
movementType = MovementType.Down;
break;
case Keys.Left:
movementType = MovementType.Left;
break;
case Keys.Right:
movementType = MovementType.Right;
break;
default:
throw new Exception("Unexpected movement type.");
}
// If the Control key was held, then we make the unit of movement smaller, for more precise movement.
if (modifierKeys.HasFlag(Keys.Control))
{
movementType |= MovementType.SingleUnit;
}
foreach (IDrawable selectedShape in selectedShapes)
{
_canvas.MoveShape(selectedShape, movementType);
}
}
}