private void lineToolStripMenuItem_Click(object sender, EventArgs e)
 {
     lineToolStripMenuItem.Checked = !lineToolStripMenuItem.Checked;
     if (lineToolStripMenuItem.Checked)
     {
         m_drawShape = DRAW_SHAPE.LINE;
     }
 }
 public void DrawShape(DRAW_SHAPE s)
 {
     m_drawShape = s;
 }
 private void fillColorToolStripMenuItem_Click(object sender, EventArgs e)
 {
     m_drawShape = DRAW_SHAPE.CIRCLE_FILL;
 }
 private void triangleToolStripMenuItem_Click(object sender, EventArgs e)
 {
     m_drawShape = DRAW_SHAPE.TRIANGLE;
 }
 private void rectangleToolStripMenuItem_Click(object sender, EventArgs e)
 {
     m_drawShape = DRAW_SHAPE.RECT;
 }
 private void circleToolStripMenuItem_Click(object sender, EventArgs e)
 {
     m_drawShape = DRAW_SHAPE.CIRCLE;
 }
 private void noneToolStripMenuItem_Click(object sender, EventArgs e)
 {
     m_drawShape = DRAW_SHAPE.NONE;
 }