Chr*_*ert 31 c# wpf controltemplate
是否有任何"最佳实践"方法来替换默认模板的一部分.当前的用例是树视图.默认情况下,树视图具有这种小三角形形状以展开和折叠.
如果我替换整个控件模板,我知道如何替换它们,如下面的代码所示.我不确定是否有办法"保持所有默认值,只需更改XY".它不是一种风格,我基本上需要替换现有控件模板的一部分.
为了说明,请查看以下XAML.第一个较小的块是我希望能够适应的相关XAML.
较大的第二和第三部分基本上是默认模板的副本,仅用于从头开始管理"已更改"部分.
有没有更好的方法来做到这一点,在下半场节省长而混乱的XAML？
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
<Setter Property="Focusable" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid
Width="15"
Height="13"
Background="Transparent">
<Path x:Name="ExpandPath"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Margin="1,1,1,1"
Fill="Black"
Data="M 4 0 L 8 4 L 4 8 Z"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked"
Value="True">
<Setter Property="Data"
TargetName="ExpandPath"
Value="M 0 4 L 8 4 L 4 8 Z"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeViewItem}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="19"
Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<ToggleButton x:Name="Expander"
Style="{StaticResource ExpandCollapseToggleStyle}"
IsChecked="{Binding Path=IsExpanded,
RelativeSource={RelativeSource TemplatedParent}}"
ClickMode="Press"/>
<Border Name="Bd"
Grid.Column="1"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}">
<ContentPresenter x:Name="PART_Header"
ContentSource="Header"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
</Border>
<ItemsPresenter x:Name="ItemsHost"
Grid.Row="1"
Grid.Column="1"
Grid.ColumnSpan="2"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded"
Value="false">
<Setter TargetName="ItemsHost"
Property="Visibility"
Value="Collapsed"/>
</Trigger>
<Trigger Property="HasItems"
Value="false">
<Setter TargetName="Expander"
Property="Visibility"
Value="Hidden"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="HasHeader"
Value="false"/>
<Condition Property="Width"
Value="Auto"/>
</MultiTrigger.Conditions>
<Setter TargetName="PART_Header"
Property="MinWidth"
Value="75"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="HasHeader"
Value="false"/>
<Condition Property="Height"
Value="Auto"/>
</MultiTrigger.Conditions>
<Setter TargetName="PART_Header"
Property="MinHeight"
Value="19"/>
</MultiTrigger>
<Trigger Property="IsSelected"
Value="true">
<Setter TargetName="Bd"
Property="Background"
Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected"
Value="true"/>
<Condition Property="IsSelectionActive"
Value="false"/>
</MultiTrigger.Conditions>
<Setter TargetName="Bd"
Property="Background"
Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
</MultiTrigger>
<Trigger Property="IsEnabled"
Value="false">
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
Pag*_*age 24
不幸的是,我认为你必须更换整个模板:
来自MSDN:http://msdn.microsoft.com/en-us/library/aa970773.aspx
Windows Presentation Foundation(WPF)中的控件具有ControlTemplate,其中包含该控件的可视树.您可以通过修改该控件的ControlTemplate来更改控件的结构和外观.没有办法只替换控件的部分可视树; 若要更改控件的可视树,必须将控件的Template属性设置为新的完整ControlTemplate.
Roc*_*lan 10
实际上有一种方式(有点).您可以创建自己的自定义控件并覆盖OnApplyTemplate函数以动态更改样式.
例如,创建一个像这样的自定义控件(我在Silverlight中这样做,但我认为它是一样的):
namespace SilverlightClassLibrary1
{
public class MyButton: Button
{
public string BackgroundColor { get; set; }
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if (BackgroundColor != null)
{
Rectangle r = this.GetTemplateChild("BackgroundGradient") as Rectangle;
if (r != null)
{
r.Fill = new SolidColorBrush(Color.FromArgb(255,
Convert.ToByte(BackgroundColor.Substring(1,2),16),
Convert.ToByte(BackgroundColor.Substring(3,2),16),
Convert.ToByte(BackgroundColor.Substring(5,2),16)));
}
}
}
}
}
有趣的部分是GetTemplateChild方法,它正在寻找名为"BackgroundGradient"的Rectangle控件.(顺便说一句,如果你在一个单独的项目中定义自定义控件会更容易,所以如果你还没有这样做,那么创建一个新的"Silverlight类库"项目并把它放到那个项目中.)
然后添加一个新的资源字典文件并覆盖控件模板,并确保您有一个名为"BackgroundGradient"的矩形.在这种情况下,我们使用标准按钮控件模板,我已经减少了一点:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:custom="clr-namespace:SilverlightClassLibrary1;assembly=SilverlightClassLibrary1">
<Style TargetType="custom:MyButton">
<Setter Property="Background" Value="#FF1F3B53"/>
<Setter Property="Foreground" Value="#FF000000"/>
<Setter Property="Padding" Value="3"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="BorderBrush">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFA3AEB9" Offset="0"/>
<GradientStop Color="#FF8399A9" Offset="0.375"/>
<GradientStop Color="#FF718597" Offset="0.375"/>
<GradientStop Color="#FF617584" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid>
<Border x:Name="Background" CornerRadius="3" Background="White" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}">
<Grid Background="{TemplateBinding Background}" Margin="1">
<Border Opacity="0" x:Name="BackgroundAnimation" Background="#FF448DCA" />
<Rectangle x:Name="BackgroundGradient" Fill="White" >
</Rectangle>
</Grid>
</Border>
<ContentPresenter
x:Name="contentPresenter"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="{TemplateBinding Padding}"/>
<Rectangle x:Name="DisabledVisualElement" RadiusX="3" RadiusY="3" Fill="#FFFFFFFF" Opacity="0" IsHitTestVisible="false" />
<Rectangle x:Name="FocusVisualElement" RadiusX="2" RadiusY="2" Margin="1" Stroke="#FF6DBDD1" StrokeThickness="1" Opacity="0" IsHitTestVisible="false" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
因此,如果您愿意,您现在可以声明一个按钮控件并覆盖一个样式:
<UserControl x:Class="SilverlightApplication1.MainPage"
...
xmlns:custom="clr-namespace:SilverlightClassLibrary1;assembly=SilverlightClassLibrary1">
<custom:MyButton>Normal Button 1</custom:MyButton>
<custom:MyButton>Normal Button 2</custom:MyButton>
<custom:MyButton BackgroundColor="#8888cc">Customized Background</custom:MyButton>
我认为你可以变得更聪明,并通过资源名称或样式名称并动态加载它.
然后,您需要将资源文件包含在应用程序中:
<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="SilverlightApplication1.App"
>
<Application.Resources>
<ResourceDictionary >
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Dictionary1.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
并且您将在XAML设计器中看到自定义属性更改.