private void GroupTool_Click(object sender, EventArgs e) { creator = new GroupCreator(); }
private void RectangleTool_Click(object sender, EventArgs e) { creator = new RectangleCreator(); }
private void EllipseTool_Click(object sender, EventArgs e) { creator = new EllipseCreator(); }
private void SelectTool_Click(object sender, EventArgs e) { creator = null; }