Question

假设我有一个像

这样的风格

<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色标的颜色值设置为不同的颜色，比如在MouseOver上，我知道我使用的是Trigger，但是如何引用该颜色值呢？

Answer 1

不幸的是，我不确定你是否可以用一个渐变停止来做。您可能必须触发更改整个背景画笔：

<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>

WPF /样式：设置模板元素的属性值

1 个答案: