我正在创建一个搜索并使用 突出显示文本FlowDocumentPageViewer，类似于给出的链接。
http://kentb.blogspot.com/2009/06/search-and-highlight-text-in-arbitrary.html
当我搜索字符串标记时，（使用字符串列表）一切正常，并且我的矩形得到了适当的应用。但是我这里有两个问题，
当我更改 的页面时
FlowDocumentPageViewer，我的 Rectangular 突出显示区域保持不变，并且它没有与 Text 一起下沉。当我放大或缩小 时
FlowDocumentPageViewer，文本会被放大，但突出显示矩形保持在同一位置，
您能帮我解决这个问题，以便将矩形应用于文本本身。我在这里提出我的申请。如果您需要更多信息，请告诉我。
<StackPanel Grid.Row="0" Orientation="Horizontal">
<TextBox x:Name="_searchTextBox" Text="{Binding SearchText, UpdateSourceTrigger=PropertyChanged}" Width="200" Height="20" Margin="2"/>
<Button x:Name="_searchButton" Height="{Binding Height, ElementName=_searchTextBox}" Width="50" Content="GO">
</Button>
<Button x:Name="_listItems" Height="{Binding Height, ElementName=_searchTextBox}" Width="50" Content="List"/>
</StackPanel>
<Grid Grid.Row="1">
<FlowDocumentPageViewer>
<FlowDocument Foreground="Black" FontFamily="Arial">
<Paragraph FontSize="11">
The following details have been details from Amazon to match your initial query.Some of the returned values may have been empty, so have been ommitted from theresults shown here.Also where there have been more than one value returned viathe Amazon Details, these to have beenomitted for the sake of keeping things simplefor this small demo application. Simple is good,when trying to show how something works
</Paragraph>
</FlowDocument>
</FlowDocumentPageViewer>
</Grid>
<ItemsControl ItemsSource="{Binding SearchRectangles}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Rectangle Fill="#99FFFF00" Width="{Binding Width}" Height="{Binding Height}" Tag="{Binding Text}" MouseDown="Rectangle_MouseDown">
<Rectangle.Style>
<Style TargetType="{x:Type Rectangle}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BitmapEffect">
<Setter.Value>
<OuterGlowBitmapEffect GlowColor="BurlyWood" GlowSize="7"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Rectangle.Style>
</Rectangle>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemContainerStyle>
<Style>
<Setter Property="Canvas.Top" Value="{Binding Top}"/>
<Setter Property="Canvas.Left" Value="{Binding Left}"/>
</Style>
</ItemsControl.ItemContainerStyle>
</ItemsControl>
</Grid>
</Grid>
public partial class Window1 : Window
{
public static readonly DependencyProperty SearchTextProperty = DependencyProperty.Register("SearchText",
typeof(string),
typeof(Window1));
public static readonly DependencyProperty SearchRectanglesProperty = DependencyProperty.Register("SearchRectangles",
typeof(ICollection<SearchRectangle>),
typeof(Window1));
public IList<string> SearchTokens { get; set; }
public Window1()
{
InitializeComponent();
SearchRectangles = new ObservableCollection<SearchRectangle>();
_searchButton.Click += delegate
{
DoSearch();
};
_listItems.Click += delegate
{
SearchTokens = new List<string>();
SearchTokens.Add("been");
SearchTokens.Add("Amazon");
SearchTokens.Add("following");
DoSearch(SearchTokens);
};
_searchTextBox.KeyDown += delegate(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
DoSearch();
}
};
}
public void DoSearch(IList<string> searchTokens)
{
SearchRectangles.Clear();
if (searchTokens == null)
return;
foreach (string token in searchTokens)
{
SearchText = token;
DoSearch();
}
}
public string SearchText
{
get { return GetValue(SearchTextProperty) as string; }
set { SetValue(SearchTextProperty, value); }
}
public ICollection<SearchRectangle> SearchRectangles
{
get { return GetValue(SearchRectanglesProperty) as ICollection<SearchRectangle>; }
set { SetValue(SearchRectanglesProperty, value); }
}
private void DoSearch()
{
DoSearch(false);
}
private void DoSearch(bool clearExisting)
{
if( clearExisting == true )
SearchRectangles.Clear();
if (SearchText.Length == 0)
{
return;
}
DoSearch(this);
}
private void DoSearch(DependencyObject searchIn)
{
if (searchIn == null)
{
return;
}
var contentHost = searchIn as IContentHost;
if (contentHost != null)
{
DoSearch(contentHost as UIElement, contentHost);
}
else
{
var documentViewerBase = searchIn as DocumentViewerBase;
if (documentViewerBase != null)
{
//extract the content hosts from the document viewer
foreach (var pageView in documentViewerBase.PageViews)
{
contentHost = pageView.DocumentPage as IContentHost;
if (contentHost != null)
{
DoSearch(documentViewerBase, contentHost);
}
}
}
}
//recurse through children
var childCount = VisualTreeHelper.GetChildrenCount(searchIn);
for (var i = 0; i < childCount; ++i)
{
DoSearch(VisualTreeHelper.GetChild(searchIn, i));
}
}
private void DoSearch(UIElement uiHost, IContentHost contentHost)
{
if (uiHost == null)
{
return;
}
var textBlock = contentHost as TextBlock;
if (textBlock != null)
{
//this has the side affect of converting any plain string content in the TextBlock into a hosted Run element
//that's bad in that it is unexpected, but good in that it allows us to access the hosted elements in a
//consistent fashion below, rather than special-casing TextBlocks with text only content
var contentStart = textBlock.ContentStart;
}
var hostedElements = contentHost.HostedElements;
while (hostedElements.MoveNext())
{
var run = hostedElements.Current as Run;
if (run != null && !string.IsNullOrEmpty(run.Text))
{
ApplyHighlighting(run.Text, delegate(int start, int length)
{
var textPointer = run.ContentStart;
textPointer = textPointer.GetPositionAtOffset(start, LogicalDirection.Forward);
var leftRectangle = textPointer.GetCharacterRect(LogicalDirection.Forward);
textPointer = textPointer.GetPositionAtOffset(length, LogicalDirection.Forward);
var rightRectangle = textPointer.GetCharacterRect(LogicalDirection.Backward);
var rect = new Rect(leftRectangle.TopLeft, rightRectangle.BottomRight);
var translatedPoint = uiHost.TranslatePoint(new Point(0, 0), null);
rect.Offset(translatedPoint.X, translatedPoint.Y);
return rect;
});
}
}
}
private void ApplyHighlighting(string text, Func<int, int, Rect> getRectHandler)
{
var currentIndex = 0;
while (true)
{
var index = text.IndexOf(SearchText, currentIndex, StringComparison.CurrentCultureIgnoreCase);
if (index == -1)
{
return;
}
var rect = getRectHandler(index, SearchText.Length);
if (rect != Rect.Empty)
{
SearchRectangles.Add(new SearchRectangle(rect.Top, rect.Left, rect.Width, rect.Height,SearchText));
}
currentIndex = index + SearchText.Length;
}
}
private void Rectangle_MouseDown(object sender, MouseEventArgs e)
{
Rectangle r = sender as Rectangle;
MessageBox.Show(r.Tag.ToString());
}
private void FlowDocumentPageViewer_PageViewsChanged(object sender, EventArgs e)
{
}
private void Window_SizeChanged(object sender, SizeChangedEventArgs e)
{
DoSearch(SearchTokens);
}
}
public class SearchRectangle
{
private readonly double _top;
private readonly double _left;
private readonly double _width;
private readonly double _height;
private readonly string _text;
public SearchRectangle(double top, double left, double width, double height,string text)
{
_top = top;
_left = left;
_width = width;
_height = height;
_text = text;
}
public string Text
{
get { return _text; }
}
public double Top
{
get { return _top; }
}
public double Left
{
get { return _left; }
}
public double Width
{
get { return _width; }
}
public double Height
{
get { return _height; }
}
}
最好的，
巴拉。