自学WPF--第三课透明与混色

概述  WPF可是很好的设置空间与窗体透明，通过属性Opacity设置（属性值介于0-1），窗体透明还需设置窗体的AllowTransparency属性为True(允许透明),以及WindowStyle为None(窗体无边框), 示例如下图： 代码如下：     <Grid Opacity="0.5">  <Ellipse Height="89" HorizontalAlignment="Left"

WPF可是很好的设置空间与窗体透明，通过属性Opacity设置（属性值介于0-1），窗体透明还需设置窗体的AllowTransparency属性为True(允许透明),以及windowstyle为None(窗体无边框),

示例如下图：

代码如下：

<GrID Opacity="0.5">

<Ellipse Height="89" HorizontalAlignment="left" margin="57,44,0" name="ellipse1" stroke="Black" VerticalAlignment="top" WIDth="163" Fill="Red" Opacity="0.5" />

<Ellipse Height="88" HorizontalAlignment="left" margin="149,0" name="ellipse2" stroke="Black" VerticalAlignment="top" WIDth="185" Fill="lime" Opacity="0.5" />

<Ellipse Height="100" HorizontalAlignment="left" margin="88,95,0" name="ellipse3" stroke="Black" VerticalAlignment="top" WIDth="200" Fill="Blue" Opacity="0.5" />

</GrID>

设置鼠标控制窗体移动事件代码如下：

C#:

private double oldx,oldy;

private voID Window_MouseDown(object sender,MousebuttonEventArgs e)

{

oldx = e.Getposition(this).X;

oldy = e.Getposition(this).Y;

}

private voID Window_MouseMove(object sender,MouseEventArgs e)

{

if (e.leftbutton == MousebuttonState.pressed)

{

double x = e.Getposition(this).X;

double y = e.Getposition(this).Y;

double dx = x - oldx;

double dy = y - oldy;

this.left += dx;

this.top += dy;

oldx = x;

oldy = y;

}

}

vb.net代码：

Class MainWindow
Dim oldx As Double
Dim oldy As Double

Private Sub MainWindow_MouseDown(ByVal sender As Object,ByVal e As System.windows.input.MousebuttonEventArgs) Handles Me.MouseDown
oldx = e.Getposition(Me).X
oldy = e.Getposition(Me).Y
End Sub

Private Sub MainWindow_MouseMove(ByVal sender As Object,ByVal e As System.windows.input.MouseEventArgs) Handles Me.MouseMove

If e.leftbutton = MousebuttonState.pressed Then
Dim x As Double = e.Getposition(Me).X
Dim y As Double = e.Getposition(Me).Y
Dim dx As Double = x - oldx
Dim dy As Double = y - oldy
Me.left += dx
Me.top += dy
oldx = x
oldy = y
End If

End Sub End Class

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