更新使用Static属性的元素的视觉效果
问题描述：
我使用SystemParameters.WindowGlassColor更改TabItems一堆的Foreground，但wpf无法检测到具有该静态值的颜色更改。更新使用Static属性的元素的视觉效果
<Setter Property="Foreground"
Value="{Binding Source={x:Static SystemParameters.WindowGlassColor},
Converter={StaticResource WindowColorToForegroundConverter}}"/>
转换器检测颜色是否较暗或较亮并返回反转亮度画笔。此外，如果W10机器已关闭设置Show Color on Start, Taskbar, Action Center（通过注册表）。
我可以通过SystemParameters.StaticPropertyChanged检测颜色何时更改，但我无法更新Foreground。
如何让我的应用程序知道窗口颜色的变化？
或
如何更新我的TabItems的视觉效果？
答
我做到了！
我的目标是更新我TabItems基于当前窗口的标题/铬色风格，不过由于Static属性未触发我Triggers，我不得不通过代码来做到这一点。
由于我的应用可以将镀铬扩展到客户区，因此在窗口颜色较暗时，某些Labels可能难以阅读。
这是我的工作的结果是：
光：
黑暗：
方法如下：我
使用StaticPropertyChanged检测窗口颜色变化：
private void SystemParameters_StaticPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "WindowGlassColor")
{
RibbonTabControl.UpdateVisual();
}
}
我必须创建一个定制TabItem控件，其中包含一个名为IsDark的布尔属性。
我TabControl有一个公共的方法来更新IsDark值：
public static bool UsesColor
{
get
{
try
{
//Start menu:
//HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\
//CurrentVersion\Themes\Personalize
var autoColorization =
Registry.GetValue(@"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\DWM",
"ColorPrevalence", "0").ToString();
return autoColorization.Equals("1");
}
catch (Exception)
{
return false;
}
}
}
获取的给Color亮度值：
public static int GetBrightness(this Color c)
{
//I discovered that 137 is the threshold, if more than that,
//the window title is white. Less than that, is black.
return (int)Math.Sqrt(
c.R * c.R * .241 +
c.G * c.G * .691 +
c.B * c.B * .068);
}
public void UpdateVisual()
{
//If glass isn't enabled, ignore.
var isDark = !SystemParameters.IsGlassEnabled
//Gets a registry value. See below.
|| !Glass.UsesColor
//Color threshold. See below.
|| SystemParameters.WindowGlassColor.GetBrightness() < 137;
//Manually update the IsDark property.
foreach (var tab in _tabPanel.Children.OfType<AwareTabItem>())
{
tab.IsDark = isDark;
}
}
如果Show Color on Start, Taskbar, Action Center检查获取
最后，h ERE的我AwareTabItemStyle：
<Style TargetType="{x:Type local:AwareTabItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:AwareTabItem}">
<Grid Name="Panel" Background="Transparent">
<Border Name="ContentBorder" BorderBrush="#FFD4D4D4" BorderThickness="0">
<ContentPresenter x:Name="ContentSite"
VerticalAlignment="Center" Effect="{x:Null}"
HorizontalAlignment="Center"
ContentSource="Header" Margin="10,2"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True" SourceName="Panel">
<Setter Property="Foreground" Value="#FF2B579A" />
<Setter Property="Background" Value="#FFFAFAFA" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter TargetName="Panel" Property="Background" Value="#FFFAFAFA" />
<Setter Property="Foreground" Value="#FF2B579A" />
<Setter TargetName="ContentBorder" Property="BorderThickness" Value="1,1,1,0" />
</Trigger>
<!--When ExtendChrome, !IsDark, !IsSelected-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="False"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsSelect}" Value="False"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="#FF000000"/>
<Setter TargetName="ContentBorder" Property="Background">
<Setter.Value>
<RadialGradientBrush>
<GradientStop Color="#9AFFFFFF" Offset="0"/>
<GradientStop Color="#90FFFFFF" Offset="0.4"/>
<GradientStop Offset="1"/>
</RadialGradientBrush>
</Setter.Value>
</Setter>
</MultiDataTrigger>
<!--When ExtendChrome, !IsDark, IsMouseOver-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="False"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="#FF2B579A"/>
</MultiDataTrigger>
<!--When ExtendChrome, !IsDark, IsSelected-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="False"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsSelected}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter TargetName="Panel" Property="Background" Value="#FFFAFAFA" />
<Setter Property="Foreground" Value="#FF2B579A" />
<Setter TargetName="ContentBorder" Property="BorderThickness" Value="1,1,1,0" />
</MultiDataTrigger>
<!--When ExtendChrome, IsDark, !IsSelected-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsSelected}" Value="False"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="#FFF8F8FF"/>
<Setter TargetName="ContentBorder" Property="Background">
<Setter.Value>
<RadialGradientBrush>
<GradientStop Color="{Binding Source={x:Static SystemParameters.WindowGlassColor},
Converter={StaticResource ColorToAlphaConverter}, ConverterParameter=6E}" Offset="0"/>
<GradientStop Color="{Binding Source={x:Static SystemParameters.WindowGlassColor},
Converter={StaticResource ColorToAlphaConverter}, ConverterParameter=50}" Offset="0.4"/>
<GradientStop Offset="1"/>
</RadialGradientBrush>
</Setter.Value>
</Setter>
</MultiDataTrigger>
<!--When ExtendChrome, IsDark, IsMouseOver-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="#FFBFEFFF"/>
</MultiDataTrigger>
<!--When ExtendChrome, IsDark, IsSelected-->
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Source={x:Static prop:Settings.Default}, Path=EditorExtendChrome, FallbackValue=False}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsDark}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsSelected}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter TargetName="Panel" Property="Background" Value="#FFFAFAFA" />
<Setter Property="Foreground" Value="#FF2B579A" />
<Setter TargetName="ContentBorder" Property="BorderThickness" Value="1,1,1,0" />
</MultiDataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<!--Default Values-->
<Setter Property="FontFamily" Value="Segoe UI Semilight"/>
</Style>
我注意到，使用深色窗口颜色时，黑色RadialGradientBrush有一个奇怪的效果，所以我使用的实际窗口的颜色，使柔和的背景（以提高可读性当窗口太透明时）。要使用GradientStop我必须创建一个Converter，它取当前窗口的颜色并将给定的参数作为alpha值。
ColorToAlpha转换器：
您可以结合的目的，你明确你的'StaticPropertyChanged'事件处理程序设置创建一个新的属性，或者你可以使用['BindingExpression.UpdateTarget（）' ]（https://msdn.microsoft.com/en-us/library/system.windows.data.bindingexpression.updatetarget（v = vs.110）.aspx）在事件处理程序中的方法。要么应该工作正常。你有什么？如果您仍然需要帮助，请提供一个很好的[mcve]，显示您尝试过的内容，并解释您需要帮助的具体内容。 –
这篇文章包含了迄今为止我尝试过的所有内容。我不知道如何继续。我不知道如何根据不会自行更新的'Static'值来更新Foreground。 –