cscの作法 その460

概要

cscの作法、調べてみた。
練習問題、やってみた。

練習問題

タスクトレイアイコンで、猫を走らせろ。

方針

64X16のビットマップを用意して、タイマーで切り出す。

参考にしたページ

写真

サンプルコード

using System;
using System.ComponentModel;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;

static class MyIconUtil {
	static class NativeMethods {
		[DllImport("user32.dll", CharSet = CharSet.Auto)]
		public extern static bool DestroyIcon(IntPtr handle);
	}
	public static Icon CreateIcon(byte[,] iconDot) {
		Bitmap bmp = new Bitmap(iconDot.GetLength(0), iconDot.GetLength(1));
		using (Graphics g = Graphics.FromImage(bmp))
		{
			g.Clear(Color.White);
		}
		for (int y = 0; y < iconDot.GetLength(1); y++)
		{
			for (int x = 0; x < iconDot.GetLength(0); x++)
			{
				if (iconDot[x, y] != 0)
				{
					bmp.SetPixel(x, y, Color.Black);
				}
			}
		}
		IntPtr Hicon = bmp.GetHicon();
		return Icon.FromHandle(Hicon);
	}
	public static void DestroyIcon(Icon icon) {
		NativeMethods.DestroyIcon(icon.Handle);
	}
}

class TaskTrayTest {
	static readonly int W = 16;
	static readonly int H = 16;
	NotifyIcon trayIcon;
	byte[,] iconDot;
	System.Windows.Forms.Timer timer;
	int n = 0;
	Bitmap cat;
	TaskTrayTest() {
		trayIcon = new NotifyIcon();
		iconDot = new byte[W, H];
		cat = new Bitmap("cat.bmp");
		Icon tmpIcon = MyIconUtil.CreateIcon(iconDot);
		trayIcon.Icon = tmpIcon;
		trayIcon.Visible = true;
		trayIcon.Text = "cat";
		var menu = new ContextMenuStrip();
		var menuItem = new ToolStripMenuItem();
		menu.Items.AddRange(new ToolStripMenuItem[] {
			new ToolStripMenuItem("E&xit", null, (s, e) => {
				timer.Stop();
				Application.Exit();
			}, "Exit")
		});
		trayIcon.Click += (s, e) => {
		};
		trayIcon.ContextMenuStrip = menu;
		timer = new System.Windows.Forms.Timer();
		timer.Interval = 200;
		timer.Tick += (sender, e) => {
			UpdateBoard();
		};
		timer.Start();
	}
	void UpdateBoard() {
		n++;
		if (n > 3) 
			n = 0;
		int i = n * 16;
		Rectangle rect = new Rectangle(i, 0, 16, 16);
		Bitmap bmpNew = cat.Clone(rect, cat.PixelFormat);
		IntPtr Hicon = bmpNew.GetHicon();
		Icon oldIcon = trayIcon.Icon;
		trayIcon.Icon = Icon.FromHandle(Hicon);
		MyIconUtil.DestroyIcon(oldIcon);
	}
	[STAThread]
	static void Main(string[] args) {
		new TaskTrayTest();
		Application.Run();
	}
}

以上