自定义控件--xp风格按钮（可设置文字颜色）

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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

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