/// <summary>
/// Clears the drawing panel.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_clear_Click(object sender, EventArgs e)
{
DrawingPanelHelper.ClearPanel();
NodeHolder.EmptyAllNodes();
EdgeHolder.EmptyAllEdges();
tb_console.Clear();
cb_choose_alg.Enabled = true;
if (cb_choose_alg.SelectedIndex == -1)
{
cb_choose_alg.SelectedIndex = 1;
}
}
