//click ellipse
private void HandleEllipseButtonClick(object sender, RoutedEventArgs e)
{
_model.ClickEllipse();
_ellipse.IsEnabled = false;
_line.IsEnabled = true;
_rectangle.IsEnabled = true;
}
//click ellipse
public void HandleEllipseButtonClick(object sender, System.EventArgs e)
{
_model.ClickEllipse();
_buttonEllipse.Enabled = false;
_buttonLine.Enabled = true;
_buttonRectangle.Enabled = true;
_buttonArrow.Enabled = true;
_buttonSelect.Enabled = true;
}
