public Form1()
{
InitializeComponent();
graphicsFree = panel1.CreateGraphics();
graphicsFree = FreePanel.CreateGraphics();
firstPen.SetLineCap(System.Drawing.Drawing2D.LineCap.Round, System.Drawing.Drawing2D.LineCap.Round, System.Drawing.Drawing2D.DashCap.Round);
}
private void Button6_Click(object sender, EventArgs e)
{
if (comboBox1.Visible == false)
{
FreePanel.BackColor = Color.White;
FreePanel.Invalidate();
}
else if (comboBox1.Text == "1")
{
FreePanel.BackColor = Color.White;
FreePanel.Invalidate();
}
else if (comboBox1.Text == "2")
{
panel1.BackColor = Color.White;
panel1.Invalidate();
}
}
private void FreePanel_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (comboBox1.Visible == false)
{
graphicsFree = FreePanel.CreateGraphics();
current = e.Location;
graphicsFree.DrawLine(firstPen, old, current);
old = current;
}
else
{
comboBox1.Visible = true;
if (comboBox1.Text == "1")
{
graphicsFree = FreePanel.CreateGraphics();
current = e.Location;
graphicsFree.DrawLine(firstPen, old, current);
old = current;
}
}
}
}