定义控件--xp风格按钮（可设置文字颜色）

Imports System.Drawing


Imports System.ComponentModel


Public Class winxpbutton


Inherits System.Windows.Forms.Button


   Private my_mouseDown As Boolean = False '鼠标按下


   Private my_mouseHover As Boolean = False '鼠标移到上面


   Private m_textcolor As Color = System.Drawing.Color.Black '字体颜色


   <Description("字体颜色。")> _


   Public Property textcolor() As Color


     Get

        Return m_textcolor

 
     End Get


   Set(ByVal Value As Color)

      m_textcolor = Value

      Me.Invalidate()

   End Set


End Property


Public Sub New()

    MyBase.New()


    '该调用是 Windows 窗体设计器所必需的。


   InitializeComponent()


   '在 InitializeComponent() 调用之后添加任何初始化,true表示将指定的样式应用到控件


   '设置控件样式位能够充分地更改控件行为


   Me.SetStyle(ControlStyles.UserPaint, True)


   '关联事件委托

   AddHandler Me.MouseDown, AddressOf my_OnMouseDown


   AddHandler Me.MouseUp, AddressOf my_OnMouseUp


   AddHandler Me.MouseEnter, AddressOf my_OnMouseEnter


   AddHandler Me.MouseLeave, AddressOf my_OnMouseLeave


   Height = 23


Width = 75


   End Sub



   Protected Overrides Sub OnPaint(ByVal pevent As System.Windows.Forms.PaintEventArgs)


     'pevent.ClipRectangle指在其中绘制的矩形,即使用父控件的背景色来画这个矩形按钮


      pevent.Graphics.FillRectangle(New SolidBrush(Me.Parent.BackColor), pevent.ClipRectangle)


     If (Enabled = False) Then


       '画不可用状态


       DrawDisableButton(pevent.Graphics)


    ElseIf (my_mouseDown) Then '画鼠标按下状态


       DrawMouseDownButton(pevent.Graphics)


    ElseIf (my_mouseHover) Then '画鼠标移动到其上状态


       DrawMouseHoverButton(pevent.Graphics)


    ElseIf (Focused) Then '有焦点，但鼠标未移动到其上


       DrawContainFocusButton(pevent.Graphics)


    Else '一般情况下


      DrawNormalButton(pevent.Graphics)

   End If


   '写文本

   WriteText(pevent.Graphics)


  End Sub


  '鼠标按下的状态处理


  Private Sub my_OnMouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)


  my_mouseDown = True '鼠标按下


  End Sub


  '鼠标松开状态的处理


  Private Sub my_OnMouseUp(ByVal sender As Object, ByVal e As MouseEventArgs)


  my_mouseDown = False '鼠标松开


  '重新绘制控件时发生 Paint 事件。PaintEventArgs 指定绘制控件所用的 Graphics


  '以及绘制控件所在的 ClipRectangle。


Dim pe As PaintEventArgs = New PaintEventArgs(CreateGraphics(), ClientRectangle)


   OnPaint(pe)

   End Sub


   '鼠标进入


   Private Sub my_OnMouseEnter(ByVal sender As Object, ByVal e As EventArgs)


   my_mouseHover = True '鼠标移动到其上


   Dim pe As PaintEventArgs = New PaintEventArgs(CreateGraphics(), ClientRectangle)

  OnPaint(pe)

End Sub


'鼠标移动开


Private Sub my_OnMouseLeave(ByVal sender As Object, ByVal e As EventArgs)


   my_mouseHover = False '鼠标移动开


   Dim pe As PaintEventArgs = New PaintEventArgs(CreateGraphics(), ClientRectangle)


   OnPaint(pe)


   End Sub

      Private Sub DrawBorder(ByVal g As Graphics, ByVal state As Integer)


      If (state = 1) Then '绘制一般边框


      '绘制一个画笔，高光点，宽度2


      Dim p As Pen = New Pen(SystemColors.ControlLightLight, 2)


      'g.DrawLine画线，p是画笔，后面是第一个点的坐标，第二个点的坐标


      g.DrawLine(p, 1, 1, 1, Height - 2) '绘制左侧竖线


      g.DrawLine(p, 1, 1, Width - 2, 1) '绘制上面横线


      g.DrawLine(p, Width - 1, 2, Width - 1, Height - 2) '绘制右侧竖线，由于已经在上面绘制了横线（纵坐标为1），所以从2开始


      g.DrawLine(p, 2, Height - 1, Width - 2, Height - 1) '绘制下面横线
 

      ElseIf (state = 2) Then '绘制移动到其上的边框


      '与一般边框用高光区别的是显示黄色


      Dim p As Pen = New Pen(Color.Yellow, 2)


      g.DrawLine(p, 1, 1, 1, Height - 2)


      g.DrawLine(p, 1, 1, Width - 2, 1)


      g.DrawLine(p, Width - 1, 2, Width - 1, Height - 2)


      g.DrawLine(p, 2, Height - 1, Width - 2, Height - 1)


      ElseIf (state = 3) Then '绘制按下的显示边框


      '与一般边框用高光区别的是显示暗褐色


      Dim p As Pen = New Pen(SystemColors.ControlDark, 2)


      g.DrawLine(p, 1, 1, 1, Height - 2)


      g.DrawLine(p, 1, 1, Width - 2, 1)


      g.DrawLine(p, Width - 1, 2, Width - 1, Height - 2)


      g.DrawLine(p, 2, Height - 1, Width - 2, Height - 1)


      ElseIf (state = 4) Then '绘制不可用状态边框


      '与一般边框用高光区别的是显示亮色


Dim p As Pen = New Pen(SystemColors.ControlLight, 2)


     g.DrawLine(p, 1, 1, 1, Height - 2)


     g.DrawLine(p, 1, 1, Width - 2, 1)


     g.DrawLine(p, Width - 1, 2, Width - 1, Height - 2)


     g.DrawLine(p, 2, Height - 1, Width - 2, Height - 1)


     ElseIf (state = 5) Then '绘制有焦点但鼠标不在其上的状态


     '与一般边框用高光区别的是显示兰色


Dim p As Pen = New Pen(Color.SkyBlue, 2)


g.DrawLine(p, 1, 1, 1, Height - 2)


g.DrawLine(p, 1, 1, Width - 2, 1)


g.DrawLine(p, Width - 1, 2, Width - 1, Height - 2)


g.DrawLine(p, 2, Height - 1, Width - 2, Height - 1)


End If


'//做完如上的处理后再对可用和不可用做圆化边缘处理（也就是把按钮的4个角进行圆化处理）


If (state = 4) Then '不可用时


'使用画笔，Color.FromArgb(161, 161, 146)是从一个32位的ARGB值创建系统颜色，宽度为1


Dim p As Pen = New Pen(Color.FromArgb(161, 161, 146), 1)


g.DrawLine(p, 0, 2, 0, Height - 3) '左侧竖线（除了两个边角剩下的线）


g.DrawLine(p, 2, 0, Width - 3, 0) '上面横线（除了两个边角剩下的线）


g.DrawLine(p, Width - 1, 2, Width - 1, Height - 3) '右侧竖线（除了两个边角剩下的线）


g.DrawLine(p, 2, Height - 1, Width - 3, Height - 1) '下面的横线


g.DrawLine(p, 0, 2, 2, 0) '左上角


g.DrawLine(p, 0, Height - 3, 2, Height - 1) '左下角


g.DrawLine(p, Width - 3, 0, Width - 1, 2) '右上角


g.DrawLine(p, Width - 3, Height - 1, Width - 1, Height - 3) '右下角


Else 'draw normal style border


'采用默认的黑色进行绘制边角


g.DrawLine(Pens.Black, 0, 2, 0, Height - 3)


g.DrawLine(Pens.Black, 2, 0, Width - 3, 0)


g.DrawLine(Pens.Black, Width - 1, 2, Width - 1, Height - 3)


g.DrawLine(Pens.Black, 2, Height - 1, Width - 3, Height - 1)


g.DrawLine(Pens.Black, 0, 2, 2, 0)


g.DrawLine(Pens.Black, 0, Height - 3, 2, Height - 1)


g.DrawLine(Pens.Black, Width - 3, 0, Width - 1, 2)


g.DrawLine(Pens.Black, Width - 3, Height - 1, Width - 1, Height - 3)


End If


End Sub


   '一般状态


   Private Sub DrawNormalButton(ByVal g As Graphics)


   '绘制边框，宽度为1


   DrawBorder(g, 1)


   '绘制背景，用高光点颜色


   PaintBack(g, SystemColors.ControlLightLight)


  End Sub


  '鼠标移动到其上的状态


Private Sub DrawMouseHoverButton(ByVal g As Graphics)


  DrawBorder(g, 2)


   PaintBack(g, SystemColors.ControlLightLight)


End Sub


  Private Sub DrawMouseDownButton(ByVal g As Graphics)


   DrawBorder(g, 3)


   '绘制背景，用三维元素的亮色


   PaintBack(g, SystemColors.ControlLight)


 End Sub


Private Sub DrawDisableButton(ByVal g As Graphics)


   DrawBorder(g, 4)


   '亮色


   PaintBack(g, SystemColors.ControlLight)


End Sub


Private Sub DrawContainFocusButton(ByVal g As Graphics)


   DrawBorder(g, 5)


   '高光点


   PaintBack(g, SystemColors.ControlLightLight)


End Sub


   '绘制背景色


   Private Sub PaintBack(ByVal g As Graphics, ByVal c As Color)


   '填充时采用：单色画刷，相对与（0，0）坐标（3，3）的位置，大小为宽-6，高-6


   g.FillRectangle(New SolidBrush(c), 3, 3, Width - 6, Height - 6)


End Sub


   '写文本


   Private Sub WriteText(ByVal g As Graphics)


   '计算文本的位置


   Dim x As Integer = 0


   Dim y As Integer = 0


   'size用宽高有序对表示矩形区域


   Dim s As Size = g.MeasureString(Text, Font).ToSize()


   x = (Width - s.Width) / 2 '文字相对控件x偏移


   y = (Height - s.Height) / 2 '文字相对控件y偏移


   '写文本


   If (Enabled) Then '如果控件可用，则黑色文字


   'g.DrawString(Text, Font, Brushes.Black, x, y)


Dim b As New SolidBrush(m_textcolor)


   g.DrawString(Text, Font, b, x, y)
 

  Else '如果控件不可用，则灰色文字


    g.DrawString(Text, Font, Brushes.Gray, x, y)


  End If


  End Sub


End Class