WPF/样式：设置模板元素的属性值

发布于 2024-10-02 01:14:23 字数 956 浏览 0 评论 0原文

假设我有一个类似

<Style x:Key="NotificationItemTemplate" TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <DockPanel LastChildFill="False">
                    <DockPanel.Background>
                        <LinearGradientBrush>
                            <GradientStop Offset="0" Color="#FF565656" /> <!-- How to change color values -->
                            <GradientStop Offset="1" Color="#FF353535" />
                        </LinearGradientBrush>
                    </DockPanel.Background>
                    ...
                </DockPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

如何将上面标记的渐变停止点的颜色值设置为不同颜色的样式，例如在 MouseOver 上，我知道我使用触发器，但如何引用该颜色值？

原文

Suppose I have a style like

<Style x:Key="NotificationItemTemplate" TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <DockPanel LastChildFill="False">
                    <DockPanel.Background>
                        <LinearGradientBrush>
                            <GradientStop Offset="0" Color="#FF565656" /> <!-- How to change color values -->
                            <GradientStop Offset="1" Color="#FF353535" />
                        </LinearGradientBrush>
                    </DockPanel.Background>
                    ...
                </DockPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

How can I set the color value of a gradient stop as labeled above to a different color, say on MouseOver, I know I use a Trigger, but how do I refer to that color value?

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猫烠⑼条掵仅有一顆心 2024-10-09 01:14:23

不幸的是，我不确定你是否可以为单个梯度停止做到这一点。您可能必须触发才能更改整个背景画笔：

<Style TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <DockPanel LastChildFill="False" x:Name="dock">
                    <DockPanel.Background>
                        <LinearGradientBrush>
                            <GradientStop Offset="0" Color="#FF565656" />
                            <!-- How to change color values -->
                            <GradientStop Offset="1" Color="#FF353535" />
                        </LinearGradientBrush>
                    </DockPanel.Background>
                    <ContentPresenter />
                </DockPanel>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter TargetName="dock" Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush>
                                    <GradientStop Offset="0" Color="#00CDFFFF" />
                                    <!-- How to change color values -->
                                    <GradientStop Offset="1" Color="#FF343465" />
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Unfortunately, I'm not sure if you can do it for a single gradient stop. You likely have to trigger to change the entire background brush:

<Style TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <DockPanel LastChildFill="False" x:Name="dock">
                    <DockPanel.Background>
                        <LinearGradientBrush>
                            <GradientStop Offset="0" Color="#FF565656" />
                            <!-- How to change color values -->
                            <GradientStop Offset="1" Color="#FF353535" />
                        </LinearGradientBrush>
                    </DockPanel.Background>
                    <ContentPresenter />
                </DockPanel>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter TargetName="dock" Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush>
                                    <GradientStop Offset="0" Color="#00CDFFFF" />
                                    <!-- How to change color values -->
                                    <GradientStop Offset="1" Color="#FF343465" />
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

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