Question

我在自定义按钮样式中有以下触发器：

<Trigger Property="IsEnabled" Value="true">
    <Setter Property="BorderBrush" Value="#FFFFFFFF" />
    <Setter Property="Foreground" Value="#FFFFFFFF" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
    <Setter Property="BorderBrush" Value="#FFFF9800" />
    <Setter Property="Foreground" Value="#FFFF9800" />
</Trigger>

但它们根本不适用于我的GUI。以下是整个风格。

<Window.Resources>
    <Style x:Key="Button.Hoverless" TargetType="{x:Type ButtonBase}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ButtonBase}">
                    <Border Name="border"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Padding="{TemplateBinding Padding}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        Background="{TemplateBinding Background}">
                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True" />
                                <Condition Property="Selector.IsSelected" Value="False" />
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="#FFFF9800" />
                            <Setter Property="Opacity" Value="0.50" />
                        </MultiTrigger>

                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True" />
                                <Condition Property="Selector.IsSelected" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="#FFFFB850" />
                        </MultiTrigger>

                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="False" />
                                <Condition Property="Selector.IsSelected" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="#FFFF9800" />
                        </MultiTrigger>

                        <Trigger Property="IsEnabled" Value="true">
                            <Setter Property="BorderBrush" Value="#FFFFFFFF" />
                            <Setter Property="Foreground" Value="#FFFFFFFF" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="BorderBrush" Value="#FFFF9800" />
                            <Setter Property="Foreground" Value="#FFFF9800" />
                        </Trigger>

                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="border" Property="Opacity" Value="0.95" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

我是WPF样式的新手，因此我不确定我在哪里出错了。还包括按钮代码：

<Button x:Name="btnScanFP1" Content="Scan Fingerprint" Grid.Column="1" 
        HorizontalAlignment="Left" Margin="10,10,0,0" Grid.Row="4" VerticalAlignment="Top"
        Width="227" Height="21" Grid.ColumnSpan="2" FontSize="11" Click="btnScanFP1_Click"
        Background="{x:Null}" BorderBrush="#FFFF9800" Foreground="#FFFF9800"
        Style="{StaticResource Button.Hoverless}"/>

Answer 1

根据Dependency Property Setting Precedence List，显式设置属性的优先级高于样式触发器（它本身的优先级高于样式设置器）。

从按钮中删除BorderBrush="#FFFF9800"将允许样式触发器按预期更改边框画笔。 Foreground属性也是如此。

但也许更好的解决方案是按名称引用控件模板中的边框：

<Trigger Property="IsEnabled" Value="True">
    <Setter TargetName="border" Property="BorderBrush" Value="#FFFFFFFF" />
</Trigger>

这会覆盖边框BorderBrush属性上的模板绑定，因此即使您在按钮上明确设置了BorderBrush属性，它也会适用。

样式不适用

1 个答案: