FlowDocument中的波浪下划线

Question

在WPF中，是否有一种简单的方法可以向 FlowDocument 元素添加波浪下划线（如Word中的拼写错误）？有 Underline 类，但似乎无法设置样式。

Answer 1

您可以使用Robert Macne解决方案的以下更改来创建波浪效果

将可视化画笔添加到Grid.Resources部分：

<VisualBrush x:Key="WavyBrush" Viewbox="0,0,3,2" ViewboxUnits="Absolute" Viewport="0,0.8,6,4" ViewportUnits="Absolute" TileMode="Tile">
    <VisualBrush.Visual>
        <Path Data="M 0,1 C 1,0 2,2 3,1" Stroke="Red" StrokeThickness="0.2" StrokeEndLineCap="Square" StrokeStartLineCap="Square" />
    </VisualBrush.Visual>
</VisualBrush>

将笔改为：

<Pen Brush="{StaticResource WavyBrush}" Thickness="6" />

Answer 2

红色下划线很简单：

<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid.Resources>
        <FlowDocument x:Key="doc">
            <Paragraph>
                <Run Text="This text is underlined in red.">
                    <Run.TextDecorations>
                        <TextDecoration Location="Underline">
                            <TextDecoration.Pen>
                                <Pen Brush="Red" Thickness="1" DashStyle="{x:Static DashStyles.Dot}"/>
                            </TextDecoration.Pen>
                        </TextDecoration>
                    </Run.TextDecorations>
                </Run>
            </Paragraph>
        </FlowDocument>
    </Grid.Resources>
    <FlowDocumentReader Document="{StaticResource doc}"/>
</Grid>

波浪红色下划线会涉及更多，但我认为你可以在其中创建一个带有波浪状红色东西的VisualBrush，并将其设置为您指定的笔刷TextDecoration的下划线。 编辑：请参阅 bstoney 的帖子。

Answer 3

这是@ bstoney在代码中实现的解决方案。

Pen path_pen = new Pen(new SolidColorBrush(Colors.Red), 0.2);
path_pen.EndLineCap = PenLineCap.Square;
path_pen.StartLineCap = PenLineCap.Square;

Point path_start = new Point(0, 1);
BezierSegment path_segment = new BezierSegment(new Point(1, 0), new Point(2, 2), new Point(3, 1), true);
PathFigure path_figure = new PathFigure(path_start, new PathSegment[] { path_segment }, false);
PathGeometry path_geometry = new PathGeometry(new PathFigure[] { path_figure });

DrawingBrush squiggly_brush = new DrawingBrush();
squiggly_brush.Viewport = new Rect(0, 0, 6, 4);
squiggly_brush.ViewportUnits = BrushMappingMode.Absolute;
squiggly_brush.TileMode = TileMode.Tile;
squiggly_brush.Drawing = new GeometryDrawing(null, path_pen, path_geometry);

TextDecoration squiggly = new TextDecoration();
squiggly.Pen = new Pen(squiggly_brush, 6);
text_box.TextDecorations.Add(squiggly);

Answer 4

我知道这是一个老问题，但我更喜欢这个画笔。它有点棱角但很干净。

    <VisualBrush x:Key="WavyBrush">
        <VisualBrush.Visual>
            <Path Data="M 0,2 L 2,0 4,2 6,0 8,2 10,0 12,2" Stroke="Red"/>
        </VisualBrush.Visual>
    </VisualBrush>