所以在我的主应用 ResourceDictionary 中,我的风格以
<Style TargetType="{x:Type TabItem}" x:Key="{x:Type TabItem}">
现在我正在做的是覆盖 TabControl 以制作自定义控件(没有任何 xaml)。问题是此时它没有继承自定义 TabControl 模板。
所以我想知道的是,我如何以编程方式绑定到模板的“x:Key”,考虑到它绑定到特定控件而我的控件没有 xaml 文件。
网上有些地方说要这样做
this.Style = (Style)FindResource("TabItem");
但这似乎不适用于我的情况。“样式”在一个单独的文件中,并导入到我的 App.Xaml 资源字典中......所以它正确地覆盖了所有 TabItems,但不是我覆盖的那个。
这是我的 App.xaml
<Application x:Class="Octgn.OctgnApp" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Resources/Themes/Full/ExpressionDark.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
并且来自 ExpressionDark.xaml 的项目(略微截断,因为它很大)
<Style d:IsControlPart="True" TargetType="{x:Type TabItem}" x:Key="{x:Type TabItem}">
<Setter Property="Foreground" Value="{DynamicResource TextBrush}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid x:Name="grid" Margin="2,1,2,3">
<Grid.LayoutTransform>
<TransformGroup>
<ScaleTransform ScaleX="1" ScaleY="1"/>
<SkewTransform AngleX="0" AngleY="0"/>
<RotateTransform Angle="0"/>
<TranslateTransform X="0" Y="0"/>
</TransformGroup>
</Grid.LayoutTransform>
<Border x:Name="border" BorderBrush="{x:Null}" CornerRadius="2,2,2,2" Opacity="0.5">
<Border.Background>
<LinearGradientBrush EndPoint="0.5,0.976" StartPoint="0.5,0.039">
<GradientStop Color="#7F595959" Offset="0" />
<GradientStop Color="#19FFFFFF" Offset="1" />
</LinearGradientBrush>
</Border.Background>
</Border>
<Border x:Name="SelectedBorder" BorderBrush="{x:Null}" CornerRadius="2,2,2,2" Opacity="0" Background="{DynamicResource SelectedBackgroundBrush}"/>
<Border x:Name="HoverBorder" BorderBrush="{x:Null}" CornerRadius="2,2,2,2" Opacity="0">
<Border.Background>
<LinearGradientBrush EndPoint="0.5,0.976" StartPoint="0.5,0.039">
<GradientStop Color="#7F595959" Offset="0" />
<GradientStop Color="#19FFFFFF" Offset="1" />
</LinearGradientBrush>
</Border.Background>
</Border>
<Grid>
<ContentPresenter x:Name="ContentSite" RecognizesAccessKey="True" ContentSource="Header" d:LayoutOverrides="Width, Height" HorizontalAlignment="Center" Margin="6,1,6,1" VerticalAlignment="Center" />
</Grid>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
此样式自动应用于 TabItem,但我试图将其应用于我的 TabItem 覆盖。
这是代码
/// <summary>
/// The chat bar item.
/// </summary>
public class ChatBarItem : TabItem
{
/// <summary>
/// Sets the Chat Room
/// </summary>
private readonly NewChatRoom room;
/// <summary>
/// Initializes static members of the <see cref="ChatBarItem"/> class.
/// </summary>
static ChatBarItem()
{
DefaultStyleKeyProperty.OverrideMetadata(
typeof(ChatBarItem), new FrameworkPropertyMetadata(typeof(TabItem)));
}
/// <summary>
/// Initializes a new instance of the <see cref="ChatBarItem"/> class.
/// </summary>
/// <param name="chatRoom">
/// The chat Room.
/// </param>
public ChatBarItem(NewChatRoom chatRoom)
{
this.room = chatRoom;
this.ConstructControl();
}
/// <summary>
/// Initializes a new instance of the <see cref="ChatBarItem"/> class.
/// </summary>
public ChatBarItem()
{
this.room = null;
this.ConstructControl();
}
/// <summary>
/// Constructs this control
/// </summary>
private void ConstructControl()
{
//this.Background = Brushes.Transparent;
//this.BorderThickness = new Thickness(0);
//this.Style = (Style)FindResource("TabItem");
// this is where I want to set the style of this control
// Main content object
var mainBorder = new Border { Margin = new Thickness(5) };
// Main content grid
var g = new Grid();
g.ColumnDefinitions.Add(new ColumnDefinition());
g.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(16) });
// Create item label
var label = new TextBlock() { VerticalAlignment = VerticalAlignment.Center };
if (this.IsInDesignMode() || this.room == null)
{
label.Inlines.Add(new Run("test"));
}
else
{
label.Inlines.Add(new Run(this.room.GroupUser.User.User));
}
// Create close button
var borderClose = new Border { Width = 16, Height = 16 };
var imageClose = new Image()
{
Source = new BitmapImage(new Uri("pack://application:,,,/Octgn;component/Resources/close.png")),
Stretch = Stretch.Uniform
};
// --Add items to items
// Add close image to closeBorder
borderClose.Child = imageClose;
// Add Close 'button' to grid
g.Children.Add(borderClose);
Grid.SetColumn(borderClose, 1);
// Add label to main grid
g.Children.Add(label);
// Add main grid to main border
mainBorder.Child = g;
// Add main grid to this
this.Header = mainBorder;
}
}
如果我有 TabItem 的 xaml,我可以轻松地使用 Style="{DynamicResource {x:Type TabItem}}"(或类似的东西),但我是以编程方式完成的。