Winform下重写Button按钮

由于项目需求,需要重写Winform Button 控件,达到用户体验.  在网上查了许多资料,其中有参考水晶按钮. 最后效果,如下图

 

首先有定义几个枚举对象:

 1  private enum MouseAction
 2         {
 3             Leave,
 4             Over,
 5             Click
 6         }
 7         /// <summary>
 8         /// 颜色渐变方式
 9         /// </summary>
10         private enum GradualMethod
11         {
12             UpToDown,
13             LeftToRight,
14             LeftUpToRightDown,
15             RightUpToLeftDown
16         }

然后定义渐变色属性:

 1  /// <summary>
 2         /// 第一渐变颜色
 3         /// </summary>
 4         public Color FirstGradualColor
 5         {
 6             get
 7             {
 8                 return FirstColor;
 9             }
10             set
11             {
12                 FirstColor = value;
13             }
14         }
15         /// <summary>
16         /// 第二渐变颜色
17         /// </summary>
18         public Color SecondGradualColor
19         {
20             get
21             {
22                 return SecondColor;
23             }
24             set
25             {
26                 SecondColor = value;
27             }
28         }

最后在Onpaint事件中处理相应该的重绘工作. 代码如下:

1  protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)

 2         {            
 3             int r = 10;
 4             int BtnOffSet = 0;
 5             Color FColor = Color.FromArgb(245, 245, 245);        
 6             Color SColor = Color.FromArgb(180, 175, 190);
 7             Color TempFColor = this.FirstColor;
 8             Color TempSColor = this.SecondColor;           
 9             int offsetwidth = this.Width / 50;
10             switch (MAction)
11             {
12                 case MouseAction.Click:
13                     BtnOffSet = 2;
14                     break;
15                 case MouseAction.Leave:
16                     BtnOffSet = 0;
17                     TempFColor = FirstColor;
18                     TempSColor = SecondColor;
19                     break;
20                 case MouseAction.Over:
21                     TempFColor = FColor;
22                     TempSColor = SColor;
23                     break;
24             }            
25             Rectangle rc = new Rectangle(BtnOffSet, BtnOffSet, this.ClientSize.Width-1 , this.ClientSize.Height-1 );           
26             int x = rc.X, y = rc.Y, w = rc.Width, h = rc.Height;
27             GraphicsPath path = new GraphicsPath();
28             path.AddArc(x, y, r, r, 180, 90);
29             path.AddArc(x + w - r, y, r, r, 270, 90);
30             path.AddArc(x + w - r, y + h - r, r, r, 0, 90);    
31             path.AddArc(x, y + h - r, r, r, 90, 90);    
32             path.CloseFigure();
33             this.Region = new Region(path);
34             LinearGradientBrush b = null;
35             switch (GradualM)
36             {
37                 case GradualMethod.UpToDown:
38                     b = new LinearGradientBrush(rc, TempFColor, TempSColor, LinearGradientMode.Vertical);
39                     break;
40                 case GradualMethod.RightUpToLeftDown:
41                     b = new LinearGradientBrush(rc, TempFColor, TempSColor, LinearGradientMode.BackwardDiagonal);
42                     break;
43                 case GradualMethod.LeftUpToRightDown:
44                     b = new LinearGradientBrush(rc, TempFColor, TempSColor, LinearGradientMode.ForwardDiagonal);
45                     break;
46                 case GradualMethod.LeftToRight:
47                     b = new LinearGradientBrush(rc, TempFColor, TempSColor, LinearGradientMode.Horizontal);
48                     break;
49             }            
50             e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
51             e.Graphics.FillPath(b, path);          
52             e.Graphics.DrawPath(new Pen(Color.Gray, 3), path);
53             StringFormat drawFormat = new StringFormat();
54             drawFormat.FormatFlags = StringFormatFlags.DisplayFormatControl;
55             drawFormat.LineAlignment = StringAlignment.Center;
56             drawFormat.Alignment = System.Drawing.StringAlignment.Center;
57             e.Graphics.DrawString(this.Text, this.Font, new LinearGradientBrush(this.ClientRectangle, Color.Black, Color.Black, LinearGradientMode.Vertical), rc, drawFormat);
58             b.Dispose();
59         } 
60         protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs mevent)
61         {
62             MAction = MouseAction.Click;
63             this.Invalidate(false);
64             base.OnMouseDown(mevent);
65         }
66         protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs mevent)
67         {
68             MAction = MouseAction.Over;
69             this.Invalidate(false);
70             base.OnMouseUp(mevent);
71         }
72         protected override void OnMouseEnter(EventArgs e)
73         {
74             MAction = MouseAction.Over;
75             this.Invalidate(false);
76             base.OnMouseEnter(e);
77         }
78         protected override void OnNotifyMessage(System.Windows.Forms.Message m)
79         {
80             base.OnNotifyMessage(m);
81         }
82         protected override void OnMouseLeave(EventArgs e)
83         {
84             MAction = MouseAction.Leave;
85             this.Invalidate(false);
86             base.OnMouseLeave(e);
87         }       
88         protected override void OnPaintBackground(System.Windows.Forms.PaintEventArgs pevent)
89         {          
90             pevent.Graphics.Clear(Color.Wheat);
91         }

92     }

以上为主要实现的代码,另外,在处理中还对Mouse动作有作处理. 在此 不多说. 其实在整个重写过程中. 主要有以下几步:

1:绘制按钮的区域(圆形,矩形等你能想到的图形)

2:填充区域颜色或渐变色. 以及边框

3:按钮的字体