C#制作高仿360安全卫士窗体（四）- 水晶按钮

项目越来越紧，我也乐此不疲。自从上次C#制作高仿360安全卫士窗体（三）出来之后，就开始有一些人在说为什么还在坚持写这么落后的东西。我想说的是，我是从事企业信息化工作的，所有程序都只对内部使用。所以只要能满足需求就可以，比较高端先进的技术也没有时间去学习研究。
OK继续上次的内容。上次说到制作文本框，今天要写的是怎么实现水晶按钮的制作。下面是效果图：

下面是这个按钮所需要的图片素材，该素材也提取自360安全卫士。我自己做了一点点小的修改（另存为图片就可以使用）：

一、嵌入资源
将以上素材另存为，将图片保存在解决方案中Images目录下的ButtonImages文件夹中，并设置图片属性中生成操作选择为“嵌入的资源”。

二、添加控件
资源嵌入之后再在ControlEx目录中建立一个名为GlassButton的文件夹用来存放该控件的代码。再在该目录中建立一个名为GlassButton的用户控件
三、编码
和之前的控件一样，最开始先把该控件拥有的状态定义出来，这里我定义了四种状态：

     #region 控件状态
     /// <summary>
     /// 控件状态
     /// </summary>
     public enum State
     {
         /// <summary>
         /// 无
         /// </summary>
         Normal = ,
         /// <summary>
         /// 获得焦点
         /// </summary>
         Focused = ,
         /// <summary>
         /// 失去焦点
         /// </summary>
         LostFocused = ,
         /// <summary>
         /// 鼠标指针进入控件
         /// </summary>
         MouseEnter =
     }
     #endregion

下面是该控件的所有代码和之前基本一样：

 /// <summary>
 /// Toolbar控件
 /// </summary>
 public class GlassButton : Control
 {
     #region//私有变量
     private int bmp_Left;
     private const int bmp_Top = ;
     private const int bmp_Size = ;
     private bool _focused = false;
     private State state = State.Normal;
     public Bitmap _BackImg = ImageObject.GetResBitmap("FANGSI.UI.Images.ButtonImages.Toolbar_Hover.png");

     private Bitmap _bmp = null;
     #endregion

     #region//构造函数
     public GlassButton()
     {
         try
         {
             this.SetStyle(ControlStyles.DoubleBuffer, true);
             this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
             this.SetStyle(ControlStyles.UserPaint, true);
             this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
             this.SetStyle(ControlStyles.StandardDoubleClick, false);
             this.SetStyle(ControlStyles.Selectable, true);
             ResizeRedraw = true;
             BackColor = Color.Transparent;
             ForeColor = Color.White;//初始文本颜色
             Size = new Size(, );//初始大小
             Font = new Font("微软雅黑", , System.Drawing.FontStyle.Bold);//控件字体
         }
         catch { }
     }
     #endregion

     #region//属性
     /// <summary>
     /// 获取或设置控件显示的图片
     /// </summary>
     [CategoryAttribute("放肆雷特扩展属性"), Description("获取或设置控件显示的图标")]
     public Bitmap Bitmap
     {
         get { return _bmp; }
         set
         {
             _bmp = value;
             Invalidate(false);
         }
     }

     /// <summary>
     /// 重写控件焦点属性
     /// </summary>
     [CategoryAttribute("放肆雷特扩展属性"), 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);
         }
     }
     #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.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);
                         ImageDrawRect.DrawRect(g, _BackImg, ClientRectangle, , );
                     else
                         DrawSelected(g);
                     break;
                 }
         }

         DrawImage(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 = ;
         Height = ;
     }

     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)
     {
         ImageDrawRect.DrawRect(g, _BackImg, ClientRectangle, , );
     }

     void DrawImage(Graphics g)
     {
         if (_bmp != null)
         {
             Bitmap bmp = ScaleZoom(_bmp);
             bmp_Left = (Width - bmp.Width) / ;
             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) / , );
     }
     #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 = ;

                 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(, , bmpWidth, bmpHeight), new Rectangle(, , bmp.Width, bmp.Height), GraphicsUnit.Pixel);

             gh.Dispose();
             return zoomBmp;
         }
         catch
         { }
         finally
         {
             bmp = null;
             zoomBmp = null;
             GC.Collect();
         }
         return null;
     }
     #endregion

     #endregion
 }

编译通过后即可在工具箱中使用，图标需要自己去找。至此360高仿安全卫士系列文章已经基本完了。没有写什么，就主要记录一下自己的开发历程。过几天整理源码上传上来，给大家下载使用。

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