#462 – 画一个外观更漂亮的GridSplitter(Drawing a Better Looking GridSplitter)

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GridSplitter 用来分隔Grid面板的行和列。默认情况下，GridSplitter 控件由一个单独的Border 元素组成。你可以设置border的边框，颜色和背景色来改变GridSplitter 的外观。

我们可以在其表面画一对水平线使GridSplitter 的外观更漂亮。

我们通过重写GridSplitter 默认样式来实现这个外观。

<Window.Resources>    <Style x:Key="GridSplitterPreviewStyle" >        <Setter Property="Control.Template">            <Setter.Value>                <ControlTemplate>                    <Rectangle Fill="#80000000"/>                </ControlTemplate>            </Setter.Value>        </Setter>    </Style>    <Style x:Key="GridSplitterStyle1" TargetType="{x:Type GridSplitter}">        <Setter Property="Background"                Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>        <Setter Property="PreviewStyle" Value="{StaticResource GridSplitterPreviewStyle}"/>        <Setter Property="Template">            <Setter.Value>                <ControlTemplate TargetType="{x:Type GridSplitter}">                    <Border BorderBrush="{TemplateBinding BorderBrush}"                            BorderThickness="{TemplateBinding BorderThickness}"                            Background="{TemplateBinding Background}"                            CornerRadius="5">                        <Canvas RenderOptions.EdgeMode="Aliased" UseLayoutRounding="True"                                Height="6" VerticalAlignment="Center"                                Width="50" HorizontalAlignment="Center">                            <Line X1="0" X2="50" Y1="0" Y2="0"                                  Stroke="White" StrokeThickness="1"/>                            <Line X1="0" X2="50" Y1="1" Y2="1"                                  Stroke="#A0A0A0" StrokeThickness="1"/>                            <Line X1="0" X2="50" Y1="4" Y2="4"                                  Stroke="White" StrokeThickness="1"/>                            <Line X1="0" X2="50" Y1="5" Y2="5"                                  Stroke="#A0A0A0" StrokeThickness="1"/>                        </Canvas>                    </Border>                </ControlTemplate>            </Setter.Value>        </Setter>    </Style></Window.Resources>

同时，也为GridSplitter 指定渐变的背景色。

<Grid>    <Grid.RowDefinitions>        <RowDefinition/>        <RowDefinition Height="Auto"/>        <RowDefinition/>    </Grid.RowDefinitions>    <Grid.ColumnDefinitions>        <ColumnDefinition/>        <ColumnDefinition/>    </Grid.ColumnDefinitions>     <Label Content="Row 0 Col 0" Background="Azure" Grid.Row="0" Grid.Column="0" />    <Label Content="Row 0 Col 1" Background="Lavender" Grid.Row="0" Grid.Column="1" />    <Label Content="Row 2 Col 0" Background="Moccasin" Grid.Row="2" Grid.Column="0" />    <Label Content="Row 2 Col 1" Background="Honeydew" Grid.Row="2" Grid.Column="1" />     <GridSplitter Grid.Row ="1" Grid.ColumnSpan="2" Height="16"                  VerticalAlignment="Center" HorizontalAlignment="Stretch"                  BorderBrush="White" BorderThickness="1"                  Style="{DynamicResource GridSplitterStyle1}">        <GridSplitter.Background>            <LinearGradientBrush EndPoint="0.5,0" StartPoint="0.5,1">                <GradientStop Color="#A0A0A0" Offset="0"/>                <GradientStop Color="#E5E5E5" Offset="0.15"/>                <GradientStop Color="#ECECEC" Offset="0.8"/>                <GradientStop Color="#E5E5E5" Offset="1"/>            </LinearGradientBrush>        </GridSplitter.Background>    </GridSplitter></Grid>

原文地址：https://wpf.2000things.com/2011/12/30/462-drawing-a-better-looking-gridsplitter/

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