使用WPF,更新自定义按钮控件的背景的最佳方法是什么?

时间:2008-09-25 19:39:52

标签: wpf button triggers mouseover

在WPF中,我们正在创建自定义控件,这些控件继承自完全从头开始绘制xaml图形的按钮。我们在整个按钮xaml周围有一个边框,我们想在触发器中将MouseOver = True时用它作为更新背景的位置。我们需要知道的是,当鼠标悬停在梯形图上时,我们如何使用渐变更新此按钮的边框背景?

2 个答案:

答案 0 :(得分:3)

ControlTemplate中,给Border一个Name,然后您可以在触发器中引用其可视树的那一部分。以下是重新定义普通Button

的简短示例
<Style
    TargetType="{x:Type Button}">
    <Setter
        Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Border Name="customBorder"
                    CornerRadius="5"
                    BorderThickness="1"
                    BorderBrush="Black"
                    Background="{StaticResource normalButtonBG}">
                    <ContentPresenter
                        HorizontalAlignment="Center"
                        VerticalAlignment="Center" />
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger
                        Property="IsMouseOver"
                        Value="True">
                        <Setter
                            TargetName="customBorder"
                            Property="Background"
                            Value="{StaticResource hoverButtonBG}" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

如果这没有用,我们需要了解更多,可能会看到你自己的XAML。你的描述并没有让我清楚你的实际视觉树是什么。

答案 1 :(得分:0)

你想要添加这样的触发器......

制作这样的风格:

<Style x:Key="ButtonTemplate"
             TargetType="{x:Type Button}">
    <Setter Property="Foreground"
                    Value="{StaticResource ButtonForeground}" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate
                TargetType="{x:Type Button}">
                <Grid
                    SnapsToDevicePixels="True"
                    Margin="0,0,0,0">
                    <Border Height="20"
                                    x:Name="ButtonBorder"
                                    BorderBrush="{DynamicResource BlackBorderBrush}">
                        <TextBlock x:Name="button"
                                             TextWrapping="Wrap"
                                             Text="{Binding Path=Content, RelativeSource={RelativeSource TemplatedParent}}"
                                             SnapsToDevicePixels="True"
                                             Foreground="#FFFFFFFF"
                                             Margin="6,0,0,0"
                                             VerticalAlignment="Center"/>
                    </Border>
                </Grid>
                <ControlTemplate.Triggers>
                    <!-- Disabled -->
                    <Trigger Property="IsMouseOver"
                                     Value="True">
                        <Setter TargetName="ButtonBorder"
                                        Property="Background"
                                        Value="{DynamicResource ButtonBackgroundMouseOver}" />
                        <Setter TargetName="ButtonBorder"
                                        Property="BorderBrush"
                                        Value="{DynamicResource ButtonBorderMouseOver}" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

然后为渐变添加一些资源,如下所示:

<LinearGradientBrush x:Key="ButtonBackgroundMouseOver"
                                         EndPoint="0.5,1"
                                         StartPoint="0.5,0">
    <GradientStop Color="#FF000000"
                                Offset="0.432"/>
    <GradientStop Color="#FF808080"
                                Offset="0.9"/>
    <GradientStop Color="#FF848484"
                                Offset="0.044"/>
    <GradientStop Color="#FF787878"
                                Offset="0.308"/>
    <GradientStop Color="#FF212121"
                                Offset="0.676"/>
</LinearGradientBrush>

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