設置綁定到模板子

我從System.Windows.Controls.ScrollViewer派生並更改了Template;我的想法是創建一個ScrollViewer，如在Visual Studio 2010中看到的那樣，它具有一個小的ComboBox來將縮放設置爲文本。設置綁定到模板子

的「ZoomPercentageValueComboBox」具有以下DependencyProperty：

public double ZoomValue 
{ 
    get { return (double)GetValue(ZoomValueProperty); } 
    set { SetValue(ZoomValueProperty, value); } 
} 

public static readonly DependencyProperty ZoomValueProperty = 
    DependencyProperty.Register("ZoomValue", typeof(double), 
    typeof(ZoomPercentageComboBox), new FrameworkPropertyMetadata(1D, FrameworkPropertyMetadataOptions.Journal, 
     new PropertyChangedCallback(ZoomValue_PropertyChanged))); 

private static void ZoomValue_PropertyChanged(DependencyObject dpo, DependencyPropertyChangedEventArgs dpcea) 
{ 
    ((ZoomPercentageComboBox)dpo).Text = (((double)dpcea.NewValue) * 100).ToString() + " %"; 
}

新ScrollViewer有以下方法：

private static ControlTemplate CreateDefaultControlTemplate() 
{ 
    #region DEFAULT 
    ControlTemplate template = null; 
    FrameworkElementFactory factory = new FrameworkElementFactory(typeof(Grid), "Grid"); 
    FrameworkElementFactory child = new FrameworkElementFactory(typeof(ColumnDefinition), "ColumnDefinitionOne"); 
    FrameworkElementFactory factory3 = new FrameworkElementFactory(typeof(ColumnDefinition), "ColumnDefinitionTwo"); 
    FrameworkElementFactory factory4 = new FrameworkElementFactory(typeof(RowDefinition), "RowDefinitionOne"); 
    FrameworkElementFactory factory5 = new FrameworkElementFactory(typeof(RowDefinition), "RowDefinitionTwo"); 
    FrameworkElementFactory factory6 = new FrameworkElementFactory(typeof(ScrollBar), "PART_VerticalScrollBar"); 
    FrameworkElementFactory factory7 = new FrameworkElementFactory(typeof(ScrollBar), "PART_HorizontalScrollBar"); 
    FrameworkElementFactory factory8 = new FrameworkElementFactory(typeof(ScrollContentPresenter), "PART_ScrollContentPresenter"); 
    FrameworkElementFactory factory9 = new FrameworkElementFactory(typeof(Rectangle), "Corner"); 
    Binding binding = new Binding("HorizontalOffset") 
    { 
     Mode = BindingMode.OneWay, 
     RelativeSource = RelativeSource.TemplatedParent 
    }; 
    Binding binding2 = new Binding("VerticalOffset") 
    { 
     Mode = BindingMode.OneWay, 
      RelativeSource = RelativeSource.TemplatedParent 
    }; 
    factory.SetValue(Panel.BackgroundProperty, new TemplateBindingExtension(Control.BackgroundProperty)); 
    factory.AppendChild(child); 
    factory.AppendChild(factory3); 
    factory.AppendChild(factory4); 
    factory.AppendChild(factory5); 
    factory.AppendChild(factory9); 
    factory.AppendChild(factory8); 
    factory.AppendChild(factory6); 
    factory.AppendChild(factory7); 
    child.SetValue(ColumnDefinition.WidthProperty, new GridLength(1.0, GridUnitType.Star)); 
    factory3.SetValue(ColumnDefinition.WidthProperty, new GridLength(1.0, GridUnitType.Auto)); 
    factory4.SetValue(RowDefinition.HeightProperty, new GridLength(1.0, GridUnitType.Star)); 
    factory5.SetValue(RowDefinition.HeightProperty, new GridLength(1.0, GridUnitType.Auto)); 
    factory8.SetValue(Grid.ColumnProperty, 0); 
    factory8.SetValue(Grid.RowProperty, 0); 
    factory8.SetValue(FrameworkElement.MarginProperty, new TemplateBindingExtension(Control.PaddingProperty)); 
    factory8.SetValue(ContentControl.ContentProperty, new TemplateBindingExtension(ContentControl.ContentProperty)); 
    factory8.SetValue(ContentControl.ContentTemplateProperty, new TemplateBindingExtension(ContentControl.ContentTemplateProperty)); 
    factory8.SetValue(CanContentScrollProperty, new TemplateBindingExtension(CanContentScrollProperty)); 
    factory7.SetValue(ScrollBar.OrientationProperty, Orientation.Horizontal); 
    factory7.SetValue(Grid.ColumnProperty, 0); 
    factory7.SetValue(Grid.RowProperty, 1); 
    factory7.SetValue(RangeBase.MinimumProperty, 0.0); 
    factory7.SetValue(RangeBase.MaximumProperty, new TemplateBindingExtension(ScrollableWidthProperty)); 
    factory7.SetValue(ScrollBar.ViewportSizeProperty, new TemplateBindingExtension(ViewportWidthProperty)); 
    factory7.SetBinding(RangeBase.ValueProperty, binding); 
    factory7.SetValue(UIElement.VisibilityProperty, new Te emplateBindingExtension(ComputedHorizontalScrollBarVisibilityProperty)); 
    factory7.SetValue(FrameworkElement.CursorProperty, Cursors.Arrow); 
    factory7.SetValue(AutomationProperties.AutomationIdProperty, "HorizontalScrollBar"); 
    factory6.SetValue(Grid.ColumnProperty, 1); 
    factory6.SetValue(Grid.RowProperty, 0); 
    factory6.SetValue(RangeBase.MinimumProperty, 0.0); 
    factory6.SetValue(RangeBase.MaximumProperty, new TemplateBindingExtension(ScrollableHeightProperty)); 
    factory6.SetValue(ScrollBar.ViewportSizeProperty, new TemplateBindingExtension(ViewportHeightProperty)); 
    factory6.SetBinding(RangeBase.ValueProperty, binding2); 
    factory6.SetValue(UIElement.VisibilityProperty, new TemplateBindingExtension(ComputedVerticalScrollBarVisibilityProperty)); 
    factory6.SetValue(FrameworkElement.CursorProperty, Cursors.Arrow); 
    factory6.SetValue(AutomationProperties.AutomationIdProperty, "VerticalScrollBar"); 
    factory9.SetValue(Grid.ColumnProperty, 1); 
    factory9.SetValue(Grid.RowProperty, 1); 
    factory9.SetResourceReference(Shape.FillProperty, SystemColors.ControlBrushKey); 

    #endregion 

    /* *** */ 
    factory7.SetValue(MarginProperty, new Thickness(ZoomBoxWidth, 0, 0, 0)); 
    /* *** */ 
    FrameworkElementFactory factory10 = new FrameworkElementFactory(typeof(ZoomPercentageComboBox), ZoomBoxTemplateName); 
    factory.AppendChild(factory10); 
    factory10.SetValue(Grid.ColumnProperty, 0); 
    factory10.SetValue(Grid.RowProperty, 1); 
    factory10.SetValue(ZoomPercentageComboBox.HorizontalAlignmentProperty, 
     HorizontalAlignment.Left); 
    factory10.SetValue(ZoomPercentageComboBox.HeightProperty, 17D); 
    factory10.SetValue(ZoomPercentageComboBox.WidthProperty, ZoomBoxWidth); 
    factory10.SetValue(ZoomPercentageComboBox.IsEditableProperty, true); 
    factory10.SetValue(ZoomPercentageComboBox.VerticalContentAlignmentProperty, VerticalAlignment.Top); 
    factory10.SetValue(ZoomPercentageComboBox.HorizontalContentAlignmentProperty, HorizontalAlignment.Left); 
    factory10.SetValue(ZoomPercentageComboBox.FontSizeProperty, 10D); 
    factory10.SetValue(ZoomPercentageComboBox.FontFamilyProperty, new FontFamily("Arial")); 
    factory10.SetValue(ZoomPercentageComboBox.BorderBrushProperty, null); 
    factory10.SetValue(ZoomPercentageComboBox.BorderThicknessProperty, new Thickness(0)); 

    /* ************************************************************** 
??? 
    */ 

    template = new ControlTemplate(typeof(LSArbeitscanvasScrollViewer)) 
    { 
     VisualTree = factory 
    }; 
    template.Seal(); 

    return template; 
}

這實際上是從原來的ScrollViewer拍攝。現在我想確保如果組合框中的「ZoomValueProperty」發生更改，「ZoomPercentageValueProperty」也是ScrollViewer的類成員也會發生變化。我有想法，像這樣做：

Binding binding = new Binding("HorizontalOffset") 
    { 
     Mode = BindingMode.OneWay, 
     RelativeSource = RelativeSource.TemplatedParent 
    };

但這並沒有真正的工作

來源

2013-02-20 HerpDerpington

我終於由類ComboBox控件的使用RoutedEvent和檢查解決了這個wheter事件的來源是模板組合框：

private void ZoomPercentageComboBox_ZoomValueChanged(object sender, ZoomValueChangedEventArgs e) 
{ 
    if (e.Source == templatedZoomPercentageComboBox) 
     ZoomPercentageComboBoxZoomPercentageValue = ((double)e.NewValue); 
} 

private const string ZoomBoxTemplateName = "PART_ZoomBox"; 

private ZoomPercentageComboBox templatedZoomPercentageComboBox 
{ 
    get 
    { 
     return this.GetTemplateChild(ZoomBoxTemplateName) as ZoomPercentageComboBox; 
    } 
}

來源

2013-02-28 17:54:33 HerpDerpington

設置綁定到模板子

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