AnnotationStyling批注样式

1、实现效果

1. 可以选择不同便笺样式，对所有批注应用样式
2. 选择文本后实现对批注的文本、墨迹便笺创建、删除
3. 对选择文本的部分创建高亮不同颜色的批注，及实现清除命令

2、关注词

1. StickyNoteControl+自定义样式类

3、静态组织

流文档页面浏览器的资源字典设定，可作为ComboBox的绑定源参数

ComboBox的绑定设置：

1. ItemsSource绑定源为文档的资源字典，通过转换获取Collection<StyleMetaData>数据项
2. 子项模板绑定为上述数据项的其Key值来显示
3. 新建高亮批注按钮绑定到批注服务AnnotationService的路由命令字段。同时传递不同颜色的命令参数CommandParameter

    
        
             
          
         
         
         
         
         
         .....
    

ResourceConverter资源字典转换为自定义Collection<StyleMetaData>：

1. 获取选定项的类型Collection<ResourceDictionary>及新建要返回的类型Collection<StyleMetaData>
2. 找到字典中对应的类型StickyNoteControl(Type.TargetType.Equals())
3. 循环复制键值对到自定义类StyleMetaData

[ValueConversion(typeof (Collection
    
     ),    typeof (Collection
     
      ))]public class ResourceEntryToComboItemConverter : IValueConverter{    // ----------------------------- Convert ------------------------------    /// 
      
    ///     Parses a collection of ResourceDictionaries and    ///     extracts all StickyNote styles.    /// 
    /// 
      
           ///     A list of Styles and their associated    ///     keys (for identification).    /// 
          public object Convert(object value, Type targetType,        object parameter, CultureInfo culture)    {        var unfiltered =            value as Collection
      
       ;        var filtered =            new Collection
       
        ();        foreach (var dict in unfiltered)        {            foreach (string key in dict.Keys)            {                var aStyle = dict[key] as Style;                if (aStyle != null && aStyle.TargetType.Equals(typeof (StickyNoteControl)))                    filtered.Add(new StyleMetaData(key, aStyle));            }        }        return filtered;    } // end:Convert    // --------------------------- ConvertBack ----------------------------    public object ConvertBack(object value, Type targetType,        object parameter, CultureInfo culture) => null;}
       
      
     
    

自定义类StyleMetaData：

此类需要继承依赖性，注册Key依赖属性，方便ComboBox子项数据模板绑定Text="{binding Path=Key}"

/// 
///     Provides a simple wrapper that associates a///     Style with its ResourceDictionary key./// 
public class StyleMetaData : DependencyObject{    public static DependencyProperty KeyProperty =        DependencyProperty.Register("Key", typeof (string), typeof (StyleMetaData));    public Style Value;    public StyleMetaData(string key, Style value)    {        Key = key;        Value = value;    }    public string Key    {        get { return (string) GetValue(KeyProperty); }        set { SetValue(KeyProperty, value); }    }}

4、运行流程

当选择ComboBox不同选择项时：

1. 获取选定项及其对应样式实例new Style(),继承此样式即可得新样式
2. 清除文档的资源，添加新建的样式资源
3. 重新加载批注，因此批注会自动应用新便笺样式

// ------------------------- OnStyleSelected --------------------------/// 
///     Replaces the default StickyNote style when a new///     style is selected from the drop down combo box./// 
protected void OnStyleSelected(object sender, SelectionChangedEventArgs e){    // Extract the selected style.    var source = (ComboBox) e.Source;    var selectedStyle = (StyleMetaData) source.SelectedItem;    var newStyle = new Style(typeof (StickyNoteControl)) {BasedOn = selectedStyle.Value};    // Replace the default StickyNote style with the one that was just selected.    var defaultKey = typeof (StickyNoteControl);    if (Viewer.Resources.Contains(defaultKey))        Viewer.Resources.Remove(defaultKey);    Viewer.Resources.Add(defaultKey, newStyle);    // Re-load annotations so that they pickup new style.    var service = AnnotationService.GetService(Viewer);    service.Disable();    service.Enable(service.Store);}

主窗口加载时：获取存储的批注便笺并加载

/// 
///     Turns Annotations on./// 
protected void OnLoaded(object sender, RoutedEventArgs e){    // Make sure that an AnnotationService isn�t already enabled.    var service = AnnotationService.GetService(Viewer);    if (service == null)    {        // (a) Create a Stream for the annotations to be stored in.        _annotationStream =            new FileStream("annotations.xml", FileMode.OpenOrCreate);        // (b) Create an AnnotationService on our        // FlowDocumentPageViewer.        service = new AnnotationService(Viewer);        // (c) Create an AnnotationStore and give it the stream we        // created. (Autoflush == false)        AnnotationStore store = new XmlStreamStore(_annotationStream);        // (d) "Turn on annotations". Annotations will be persisted in        // the stream created at (a).        service.Enable(store);    }}

关闭主窗口时：保存批注编辑信息,把缓冲区数据写入xmlw文件存储

/// 
///     Turns Annotations off./// 
protected void OnUnloaded(object sender, RoutedEventArgs e){    // (a) Check that an AnnotationService    // actually existed and was Enabled.    var service = AnnotationService.GetService(Viewer);    if (service != null && service.IsEnabled)    {        // (b) Flush changes to annotations to our stream.        service.Store.Flush();        // (c) Turn off annotations.        service.Disable();        // (d) Close our stream.        _annotationStream.Close();    }}

最后样式便笺样式xaml:

StylingUsingProperties.xaml：

AdvancedStyling.xaml：

DefaultStickeyNoteStyle.xaml：

    
      
       
     
      40.0
       
     
      30.0