[C#] - 用户自定义控件(含源代码)-圆角Panel

圆角Panel代码

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;

namespace myControlLibrary
{
public partial class RoundPanel : System.Windows.Forms.Panel
{
public RoundPanel()
{
InitializeComponent();

this.Padding = new System.Windows.Forms.Padding(0, 0, 0, 0);
this.Margin = new System.Windows.Forms.Padding(0, 0, 0, 0);
this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
}


// 圆角
// ===============================================================================================
private int _Radius; // 圆角弧度

/// <summary>圆角弧度(0为不要圆角)</summary>
[Browsable(true)]
[Description(
"圆角弧度(0为不要圆角)")]
public int _setRoundRadius
{
get
{
return _Radius;
}
set
{
if (value < 0) { _Radius = 0; }
else { _Radius = value; }
base.Refresh();
}
}


// 圆角代码
public void Round(System.Drawing.Region region)
{
// -----------------------------------------------------------------------------------------------
// 已经是.net提供给我们的最容易的改窗体的属性了(以前要自己调API)
System.Drawing.Drawing2D.GraphicsPath oPath = new System.Drawing.Drawing2D.GraphicsPath();
int x = 0;
int y = 0;
int thisWidth = this.Width;
int thisHeight = this.Height;
int angle = _Radius;
if (angle > 0)
{
System.Drawing.Graphics g
= CreateGraphics();
oPath.AddArc(x, y, angle, angle,
180, 90); // 左上角
oPath.AddArc(thisWidth - angle, y, angle, angle, 270, 90); // 右上角
oPath.AddArc(thisWidth - angle, thisHeight - angle, angle, angle, 0, 90); // 右下角
oPath.AddArc(x, thisHeight - angle, angle, angle, 90, 90); // 左下角
oPath.CloseAllFigures();
Region
= new System.Drawing.Region(oPath);
}
// -----------------------------------------------------------------------------------------------
else
{
oPath.AddLine(x
+ angle, y, thisWidth - angle, y); // 顶端
oPath.AddLine(thisWidth, y + angle, thisWidth, thisHeight - angle); // 右边
oPath.AddLine(thisWidth - angle, thisHeight, x + angle, thisHeight); // 底边
oPath.AddLine(x, y + angle, x, thisHeight - angle); // 左边
oPath.CloseAllFigures();
Region
= new System.Drawing.Region(oPath);
}
}
// ===============================================================================================


public RoundPanel(IContainer container)
{
container.Add(
this);

InitializeComponent();
}

protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe)
{
base.OnPaint(pe);
Round(
this.Region); // 圆角
}

protected override void OnResize(EventArgs eventargs)
{
base.OnResize(eventargs);
base.Refresh();
}
}
}
posted @ 2010-03-13 14:05  炎峰森林影  阅读(6457)  评论(0编辑  收藏  举报