本文实例为大家分享了c# gdi+实现时钟表盘的具体代码,供大家参考,具体内容如下
一、设计如下图界面
按键“打开时钟”按下后会出现表盘,按键“退出”按下后会关闭页面。
二、多线程初始化和函数初始化
public form1() { initializecomponent(); generatebtn(); control.checkforillegalcrossthreadcalls = false; }
对按键 重命名
void generatebtn() { button bt1 = button1; bt1.text = "打开时钟"; button bt2 = button2; bt2.text = "退出"; }
三、按键“打开时钟”按下
打开多线程,运行时钟相关程序。
private void button1_click(object sender, eventargs e) { threadstart thstart = new threadstart(start); thread thread = new thread(thstart); thread.priority = threadpriority.highest; thread.isbackground = true; //关闭窗体继续执行 thread.start(); }
四、时钟主函数
给定表盘圆心坐标和半径,初始化一些画笔颜色和画刷大小以及一些变量,通过半径和圆心计算表盘上各点的坐标,读取并记录电脑上的时间戳,计算时针分针秒针的角度,通过之前计算结果绘制表盘。
每隔一秒(检测读取到的时、分、秒发生变化)擦除一遍页面,重新计算坐标点,重新绘制新的表盘。
private void start() { var graph = this.picturebox1.creategraphics(); double[] sin = new double[60]; double[] cos = new double[60]; float[] x = new float[60]; float[] y = new float[60]; float[] x1 = new float[60]; float[] y1 = new float[60]; float[] x2 = new float[60]; float[] y2 = new float[60]; float[] x3 = new float[60]; float[] y3 = new float[60]; float[] x4 = new float[60]; float[] y4 = new float[60]; float x5 =0; float y5 =0; float r0 = 0; string tradetime = datetime.now.tostring("hhmmss",system.globalization.datetimeformatinfo.invariantinfo); var pencoler1 = new pen(color.red); var pencoler2 = new pen(color.yellow); var pencoler3 = new pen(color.black); var pensize = new pen(color.black, 3); var pensize1 = new pen(color.red, 2); var pensize2 = new pen(color.black, 4); int i; int z = 0; int x0 = 500; int y0 = 300; int r = 300; int sec, min, hour; int secn = 0, minn = 0, hourn = 0; int time; for (i = 0; i < 60; i++) { //if (i == 0 || i == 30 || i == 15 || i == 45) { continue; } double d = (((i * 6) - 90) * 3.1415) / 180; sin[i] = math.sin(d); cos[i] = math.cos(d); y[i] = (float)(sin[i] * r) + y0; x[i] = (float)(cos[i] * r) + x0; x1[i] = x[i] - (x[i] - x0) / 10; y1[i] = y[i] - (y[i] - y0) / 10; x2[i] = x[i] - (x[i] - x0) / 7 - r / 20; y2[i] = y[i] - (y[i] - y0) / 7 - r / 20; x3[i] = x[i] - (x[i] - x0) / 20; y3[i] = y[i] - (y[i] - y0) / 20; x4[i] = x[i] - (x[i] - x0) / 2; y4[i] = y[i] - (y[i] - y0) / 2; x5 = x0 - r / 40; y5 = y0 - r / 40; r0 = r / 20; } brush penbrush = new solidbrush(color.black); font penfont = new font("华文行楷", r / 20); for (; ; ) { tradetime = datetime.now.tostring("hhmmss", system.globalization.datetimeformatinfo.invariantinfo); time = int.parse(tradetime); sec = time % 100; min = time / 100 % 100; hour = time / 10000; if (hour == 12) { hour = 0; } if (secn != sec || minn != min || hourn != hour) { //messagebox.show(sec.tostring()); graph.clear(this.backcolor); //graph.drawellipse(pencoler2, x0 - r, y0 - r, 2*r, 2*r); for (i = 0; i < 60; i++) { if (i % 5 == 0) { z = i / 5; if (z == 0) z = 12; graph.drawline(pensize, x[i], y[i],x1[i],y1[i]); graph.drawstring(z.tostring(), penfont, penbrush, x2[i], y2[i]); } else { graph.drawline(pencoler3, x[i], y[i], x3[i], y3[i]); } } graph.drawline(pensize1, x0, y0, x[sec], y[sec]); graph.drawline(pensize2, x0, y0, x[min], y[min]); graph.drawline(pensize2, x0, y0, x4[hour*5], y4[hour*5]); //graph.drawpie(pencoler2, x0-r, y0-r, 2*r, 2*r, sec * 6-90, 1); //graph.drawpie(pencoler3, x0-r , y0-r , r*2, r*2, min * 6-90, 1); //graph.drawpie(pencoler3, x0-r/2 , y0-r/2 , r, r, hour*30-90, 2); secn = sec; minn = min; hourn = hour; graph.fillellipse(new solidbrush(color.yellow), x5 , y5 , r0, r0); continue; } } }
五、“退出”按键按下后
得益于多线程的使用,在表盘一直处于死循环监测时间变化的同时,依然能检测到button的按下。
“退出”按下后,退出页面。
private void button2_click(object sender, eventargs e) { application.exit(); }
六、表盘上各点的计算
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。