Control Study -> 用获取路径方法得到圆形窗体(如将: PictureBox变成圆形)

(一).功能

有时候由于显示效果,需要将某个控件变一下形状.
本文举例将PictureBox[]数组变成圆形.

(二).代码

(这里说明一下,我个人将它变形是因为我用PictureBox表示象棋棋子,

由于PictureBox默认是方 的, 所以得把它变成圆的)

大家可以将这个功能作为其它用途使用.

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

namespace 智能象棋游戏
{
///

1<summary>   
2/// 功能:将所有picturebox控件变为圆形   
3/// 特点:使旗子移动出现延迟,看起来没有以前效果好,因此本程序为了保证旗子走动平滑,没有采用   
4/// 难度:1 所用时间:1个小时   
5/// </summary>

public class Class7
{
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr BeginPath(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern int SetBkMode(IntPtr hdc,int nBkMode);
const int TRANSPARENT=1;
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr EndPath(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr PathToRegion(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern int Ellipse(IntPtr hdc,int x1,int y1,int x2,int y2);
[System.Runtime.InteropServices.DllImport("user32")]
private static extern IntPtr SetWindowRgn(IntPtr hwnd,IntPtr hRgn,bool bRedraw);
[System.Runtime.InteropServices.DllImport("user32")]
private static extern IntPtr GetDC(IntPtr hwnd);
public Class7()
{
}
public void MakeToPictureBoxsToCircle(PictureBox[] pb)
{
IntPtr dc;
IntPtr region;
for(int i=0;i<pb.Length;i++)
{
dc=GetDC(pb[i].Handle);
BeginPath(dc);
SetBkMode(dc,TRANSPARENT);
Ellipse(dc,0,0,pb[i].Width-3,pb[i].Height-2);
EndPath(dc);
region=PathToRegion(dc);
SetWindowRgn(pb[i].Handle,region,false);
}
}
}
}

谢谢阅读!

Published At
Categories with Web编程
Tagged with
comments powered by Disqus