[英]wpf grid background with image brush and visual brush combined
我试图将图像设置为窗口的背景。 我想在窗口上应用渐变不透明蒙版,并平铺图像。 到目前为止,我可以选择其中一个,但不能同时选择两个。 这是我la脚的尝试:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height = "40*" />
<RowDefinition Height="133*"/>
</Grid.RowDefinitions>
<Grid.Resources>
<Image x:Key="myImage" Source="/GrimshawRibbon;component/Resources/GeometricBackground.png">
<Image.OpacityMask>
<LinearGradientBrush EndPoint = "0.5,0" StartPoint="0.5,1">
<GradientStop Color = "#00000000" Offset="0.6"/>
<GradientStop Color = "#FF000000" Offset="1"/>
</LinearGradientBrush>
</Image.OpacityMask>
</Image>
<ImageBrush x:Key="imageBrush" ImageSource="/GrimshawRibbon;component/Resources/GeometricBackground.png" TileMode="Tile" ViewportUnits="Absolute" Viewport="0,0,800,800"/>
<VisualBrush x:Key="myBrush" Visual="{StaticResource myImage}" Stretch="None" TileMode="Tile"/>
</Grid.Resources>
<DockPanel LastChildFill = "False" Grid.RowSpan="2" Background="{StaticResource imageBrush}"/>
<ContentControl x:Name="MainContentControl" Content="{Binding CurrentPageViewModel}" Margin="10" Grid.Row="1"/>
<Button x:Name="btnCancel" Content="Close" Margin="0,0,90,10" HorizontalAlignment="Right" Width="75" Height="36" VerticalAlignment="Bottom" Command="{Binding CloseWindowCommand, Mode=OneWay}" CommandParameter="{Binding ElementName=win}" Grid.Row="1"/>
<Button x:Name="button" Content="?" Margin="0,0,170,10" Height="36" VerticalAlignment="Bottom" HorizontalAlignment="Right" Width="36" Command="{Binding NavigateToHelpCommand, Mode=OneWay}" Grid.Row="1"/>
<Label x:Name="label" Content="Some label" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" FontWeight="Bold" FontSize="14"/>
<TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="10,39,0,0" TextWrapping="Wrap" Text="Some tool description that is not too long. It would be good to keep it under two sentences." VerticalAlignment="Top" Height="36" Width="272"/>
</Grid>
您可以分配DockPanel的OpacityMask
:
<DockPanel Grid.RowSpan="2" Background="{StaticResource imageBrush}">
<DockPanel.OpacityMask>
<LinearGradientBrush EndPoint="0.5,0" StartPoint="0.5,1">
<GradientStop Color="#00000000" Offset="0.6"/>
<GradientStop Color="#FF000000" Offset="1"/>
</LinearGradientBrush>
</DockPanel.OpacityMask>
</DockPanel>
或者可能只是将Rectangle用于背景图像:
<Rectangle Grid.RowSpan="2" Fill="{StaticResource imageBrush}">
<Rectangle.OpacityMask>
<LinearGradientBrush EndPoint="0.5,0" StartPoint="0.5,1">
<GradientStop Color="#00000000" Offset="0.6"/>
<GradientStop Color="#FF000000" Offset="1"/>
</LinearGradientBrush>
</Rectangle.OpacityMask>
</Rectangle>
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