首先先上效果图：
1.准备两张透明的png图片(尺寸74 x 82)，一张用于鼠标进入控件时显示，一张用于鼠标单击控件时显示
2.拖一个GlassButton按钮
3.设置按钮属性
this.btnEmailCount.BackColor = System.Drawing.Color.Transparent;
this.btnEmailCount.FlatAppearance.BorderSize = 0;
this.btnEmailCount.FlatAppearance.MouseDownBackColor = System.Drawing.Color.Transparent;
this.btnEmailCount.FlatAppearance.MouseOverBackColor = System.Drawing.Color.Transparent;
this.btnEmailCount.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnEmailCount.Font = new System.Drawing.Font("微软雅黑", 9F);
this.btnEmailCount.ForeColor = System.Drawing.Color.White;
this.btnEmailCount.Icon = global::Com.Qisentech.Email.Properties.Resources.btn_email_count;
this.btnEmailCount.Location = new System.Drawing.Point(89, 27);
this.btnEmailCount.Name = "btnEmailCount";
this.btnEmailCount.Size = new System.Drawing.Size(73, 81);
this.btnEmailCount.TabIndex = 15;
this.btnEmailCount.Text = "邮件统计";
this.btnEmailCount.UseVisualStyleBackColor = false;
this.btnEmailCount.Click += new System.EventHandler(this.btnEmailCount_Click);
下面奉上GlassButton的源码
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using Com.Qisentech.Controls.Methods;
namespace Com.Qisentech.Controls.QQControls
{
#region//控件状态
/// <summary>
/// 控件状态
/// </summary>
public enum State
{
/// <summary>
/// 无
/// </summary>
Normal = 0,
/// <summary>
/// 获得焦点
/// </summary>
Focused = 1,
/// <summary>
/// 失去焦点
/// </summary>
LostFocused = 2,
/// <summary>
/// 鼠标指针进入控件
/// </summary>
MouseEnter = 3
}
#endregion
public class : Button
{
#region//私有变量
private int bmp_Left;
private const int bmp_Top = 5;
private const int bmp_Size = 45;
private bool _focused = false;
private State state = State.Normal;
private Bitmap _icon = Properties.Resources.icon;
private string _text = null;
#endregion
#region//构造函数
public GlassButton()
{
SetStyle(ControlStyles.AllPaintingInWmPaint |
ControlStyles.DoubleBuffer |
ControlStyles.OptimizedDoubleBuffer, true); //双缓冲防止重绘时闪烁
SetStyle(ControlStyles.UserPaint, true); //自定义绘制控件内容
SetStyle(ControlStyles.SupportsTransparentBackColor, true); //模拟透明
SetStyle(ControlStyles.Selectable, true); //接收焦点
SetStyle(ControlStyles.ResizeRedraw, true);
Size = new Size(74, 82); //初始大小
Font = new System.Drawing.Font("微软雅黑", 9F); //控件字体
BackColor = System.Drawing.Color.Transparent;
FlatAppearance.BorderSize = 0;
FlatAppearance.MouseDownBackColor = System.Drawing.Color.Transparent;
FlatAppearance.MouseOverBackColor = System.Drawing.Color.Transparent;
FlatStyle = System.Windows.Forms.FlatStyle.Flat;
ForeColor = System.Drawing.Color.White;
UseVisualStyleBackColor = false;
Text = "玻璃按钮1";
}
#endregion
#region//属性
/// <summary>
/// 获取或设置控件显示的图片
/// </summary>
[Description("获取或设置控件显示的图标")]
public Bitmap Icon
{
get { return _icon; }
set
{
_icon = value;
Invalidate(false);
}
}
/// <summary>
/// 重写控件焦点属性
/// </summary>
[Description("重写控件焦点属性")]
public new bool Focused
{
get { return _focused; }
set
{
_focused = value;
if (_focused)
state = State.Focused;
else
state = State.LostFocused;
Invalidate(false);
}
}
/// <summary>
/// 与控件关联的文本
/// </summary>
[Description("与控件关联的文本。"), DefaultValue(null)]
public new string Text
{
get
{
return _text;
}
set
{
_text = value;
Invalidate(false);
}
}
#endregion
#region//重载事件
//自定义绘制
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics g = e.Graphics;
//g.DrawImage(_normalImg, ClientRectangle);
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
switch (state)
{
case State.Focused:
{
DrawSelected(g);
break;
}
case State.MouseEnter:
{
if (!Focused)
g.DrawImage(Properties.Resources.enter, ClientRectangle);
else
DrawSelected(g);
break;
}
}
DrawIcon(g);
DrawText(g);
}
//焦点进入
protected override void OnEnter(EventArgs e)
{
base.OnEnter(e);
Focused = true;
}
//失去焦点
protected override void OnLeave(EventArgs e)
{
base.OnLeave(e);
Focused = false;
}
//禁止调整大小
protected override void OnResize(EventArgs e)
{
Width = 73;
Height = 81;
}
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
state = State.MouseEnter;
Invalidate(false);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
if (!Focused)
{
state = State.LostFocused;
Invalidate(false);
}
}
//只响应单击鼠标左键事件
protected override void OnClick(EventArgs e)
{
MouseEventArgs m = (MouseEventArgs)e;
if (m.Button == MouseButtons.Left)
{
base.OnClick(e);
Focus();
}
}
#endregion
#region//方法
#region//Draw
void DrawSelected(Graphics g)
{
g.DrawImage(Properties.Resources.down, ClientRectangle);
}
void DrawIcon(Graphics g)
{
if (_icon != null)
{
Bitmap bmp = ScaleZoom(_icon);
bmp_Left = (Width - bmp.Width) / 2;
g.DrawImage(bmp, new Rectangle(bmp_Left, bmp_Top, bmp.Width, bmp.Height));
}
}
void DrawText(Graphics g)
{
SizeF size = g.MeasureString(_text, Font);
g.DrawString(_text, Font, new SolidBrush(ForeColor), (Width - size.Width) / 2, 58);
}
#endregion
#region//按比例缩放图片
public Bitmap ScaleZoom(Bitmap bmp)
{
if (bmp != null)
{
double zoomScale;
if (bmp.Width > bmp_Size || bmp.Height > bmp_Size)
{
double imageScale = (double)bmp.Width / (double)bmp.Height;
double thisScale = 1;
if (imageScale > thisScale)
{
zoomScale = (double)bmp_Size / (double)bmp.Width;
return BitMapZoom(bmp, bmp_Size, (int)(bmp.Height * zoomScale));
}
else
{
zoomScale = (double)bmp_Size / (double)bmp.Height;
return BitMapZoom(bmp, (int)(bmp.Width * zoomScale), bmp_Size);
}
}
}
return bmp;
}
#endregion
#region//缩放BitMap
/// <summary>
/// 图片缩放
/// </summary>
/// <param name="bmpSource">源图片</param>
/// <param name="bmpSize">缩放图片的大小</param>
/// <returns>缩放的图片</returns>
public Bitmap BitMapZoom(Bitmap bmpSource, int bmpWidth, int bmpHeight)
{
Bitmap bmp, zoomBmp;
try
{
bmp = new Bitmap(bmpSource);
zoomBmp = new Bitmap(bmpWidth, bmpHeight);
Graphics gh = Graphics.FromImage(zoomBmp);
gh.InterpolationMode = InterpolationMode.HighQualityBicubic;
gh.DrawImage(bmp, new Rectangle(0, 0, bmpWidth, bmpHeight),
new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
gh.Dispose();
return zoomBmp;
}
catch
{ }
finally
{
bmp = null;
zoomBmp = null;
GC.Collect();
}
return null;
}
#endregion
#endregion
}
}