cscの作法 その35 アナログ時計

概要

cscの作法、調べてみた。
練習問題やってみた。

練習問題

アナログ時計。

写真

サンプルコード

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing.Drawing2D;


class form1: Form {
	form1() {
		Text = "clock";
		Opacity = 0.7;
		ClientSize = new Size(150, 150);
		Timer timer = new Timer();
		timer.Interval = 1000; 
		timer.Tick += new EventHandler(timerTick);
		timer.Start();
	}
	protected override void OnPaint(PaintEventArgs e) {
		Graphics g = e.Graphics;
		g.TranslateTransform(ClientSize.Width / 2, ClientSize.Height / 2, MatrixOrder.Append);
		Pen BPen = new Pen(Color.Blue, 5);
		Pen GPen = new Pen(Color.Green, 5);
		Pen RPen = new Pen(Color.Red, 3);
		Point center = new Point(0, 0);
		DateTime time = DateTime.Now;
		double secAng = 2.0 * Math.PI * time.Second / 60.0;
		double minAng = 2.0 * Math.PI * (time.Minute + time.Second / 60.0) / 60.0;
		double hourAng = 2.0 * Math.PI * (time.Hour + time.Minute / 60.0) / 12.0;
		int r = Math.Min(ClientSize.Width, ClientSize.Height) / 2;
		int secHandLength = (int) (0.9 * r);
		int minHandLength = (int) (0.9 * r);
		int hourHandLength = (int) (0.7 * r);
		Point secHand = new Point((int) (secHandLength * Math.Sin(secAng)), (int) (-secHandLength * Math.Cos(secAng)));
		Point minHand = new Point((int) (minHandLength * Math.Sin(minAng)), (int) (-minHandLength * Math.Cos(minAng)));
		Point hourHand = new Point((int) (hourHandLength * Math.Sin(hourAng)), (int) (-hourHandLength * Math.Cos(hourAng)));
		g.DrawLine(RPen, center, secHand);
		g.DrawLine(GPen, center, minHand);
		g.DrawLine(BPen, center, hourHand);
	}
	void timerTick(object sender, EventArgs e) {
		this.Invalidate();
	}
	[STAThread]
	public static void Main() {
		Application.Run(new form1());
	}
}

以上。