using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
class ClippingCombinations: Form
{
string strCaption = “CombineMode = “;
MenuItem miCombineMode;
public static void Main()
{
Application.Run(new ClippingCombinations());
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
public ClippingCombinations()
{
ResizeRedraw = true;
Menu = new MainMenu();
Menu.MenuItems.Add(“&CombineMode”);
EventHandler ehClick = new EventHandler(MenuCombineModeOnClick);
for (int i = 0; i < 6; i++) { MenuItem mi = new MenuItem("&" + (CombineMode)i); mi.Click += ehClick; mi.RadioCheck = true; Menu.MenuItems[0].MenuItems.Add(mi); } miCombineMode = Menu.MenuItems[0].MenuItems[0]; miCombineMode.Checked = true; } void MenuCombineModeOnClick(object obj, EventArgs ea) { miCombineMode.Checked = false; miCombineMode = (MenuItem) obj; miCombineMode.Checked = true; Text = strCaption + (CombineMode)miCombineMode.Index; Invalidate(); } protected void DoPage(Graphics grfx, Color clr, int cx, int cy) { GraphicsPath path = new GraphicsPath(); path.AddEllipse(0, 0, 2 * cx / 3, cy); grfx.SetClip(path); path.Reset(); path.AddEllipse(cx / 3, 0, 2 * cx / 3, cy); grfx.SetClip(path, (CombineMode)miCombineMode.Index); grfx.FillRectangle(Brushes.Red, 0, 0, cx, cy); } } [/csharp]