blocks|key|328441|text|最好的方法是设计一个好的数据结构来存储你的文本，同时也要考虑命中测试。一个例子是将文本拆分成块(单词、行或段落，取决于您需要的内容)。那么每个这样的块都应该有一个边界框，在任何格式化操作中都应该重新计算边界框。在你的设计中还要考虑插入符号的位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|328442|一旦你有了这样的工具，做命中测试就变得非常容易，只需使用边界框即可。它还将有助于后续操作，如突出显示文本的特定部分。|328443|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The best way is to design a good data structure for storing your text and which also considers hit-testing. One example could be to split the text into blocks (words, lines or paragraphs depending on what you need). Then each such block should have a bounding-box which should be recomputed in any formatting operations. Also consider caret positions in your design.

Once you have such facility it becomes very easy to do hit-testing, just use the bounding boxes. It will also help in subsequent operations like highlighting a particular portion of text.

blocks|key|1027454|text|完全同意Sesh的观点--不重新实现整个FormattedText功能的最简单方法是将你想要命中测试的各个项目拆分到它们自己的控件/内联中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1027455|考虑使用TextBlock并将每个单词添加为它自己的内联(或)，然后绑定到内联的IsMouseDirectlyOver属性，我们的add委托给MouseEnter+&+MouseLeave事件。|1027456|如果你想对实际的字形进行像素级的点击测试(即鼠标恰好在这个‘i’的点上)，那么你需要使用GlyphRuns并对字形进行手动点击测试(阅读:困难的工作)。|1027457|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Completely agree with Sesh - the easiest way you're going to get away with not re-implementing a whole load of FormattedText functionality is going to be by splitting up the individual items you want to hit-test into their own controls/inlines.

Consider using a TextBlock and adding each word as it's own Inline ( or ), then either bind to the inline's IsMouseDirectlyOver property, our add delegates to the MouseEnter &amp; MouseLeave events.

If you want to do pixel-level hit testing of the actual glyphs (i.e. is the mouse exactly in the dot of this 'i'), then you'll need to use GlyphRuns and do manual hit testing on the glyphs (read: hard work).

blocks|key|4393479|text|您可以从FormattedText对象中获取每个字符的几何体，并使用每个字符的边界来执行命中测试。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4393480|var+geometry+=+(GeometryGroup)((GeometryGroup)text.BuildGeometry(new+Point(0,+0))).Children[0];
foreach+(var+c+in+geometry.Children)
{
++if+(c.Bounds.Contains(point))
++++return+index;
++index%2B%2B;
}|code-block|syntax|javascript|4393481|在OnRender中，可以渲染这些几何体对象，而不是格式化文本。|4393482|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can get the geometry of each character from a FormattedText object and use the bounds of each character to do your hit testing.

<pre><code>var geometry = (GeometryGroup)((GeometryGroup)text.BuildGeometry(new Point(0, 0))).Children[0];
foreach (var c in geometry.Children)
{
 if (c.Bounds.Contains(point))
 return index;
 index++;
}
</code></pre>

In OnRender you can render these geometry objects instead of the formatted text.

blocks|key|328568|text|我来派对已经很晚了--如果派对还没有结束，而且你不需要实际的角色几何，我发现下面这样的东西很有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|328569|+for+(int+i+=+0;+i+<+FormattedText.Text.Length;+i%2B%2B)
+{
++++++++++++characterHighlightGeometry+=+FormattedText.BuildHighlightGeometry(new+Point(),+i,+1);
++++++++++++CharacterHighlightGeometries.Children.Add(characterHighlightGeometry);
+}|code-block|syntax|javascript|328570|BuildGeometry()仅包含角色的实际路径几何体。BuildHighlightGeometry()生成所有字符的外部边界--包括空格，因此可以通过以下方式定位空格的索引：|328571|+foreach+(var+c+in+CharacterHighlightGeometries.Children)
++++++++{
++++++++++++if+(c.Bounds.Contains(centerpoint))
++++++++++++{
++++++++++++++++q+=+c;
++++++++++++++++cpos+=+index;
++++++++++++++++break;
++++++++++++}
++++++++++++index%2B%2B;
++++++++}|328572|希望这能有所帮助。|328573|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I'm very late to the party--if the party is not over, and you don't need the actual character geometry, I found something like this useful:

<pre><code> for (int i = 0; i &lt; FormattedText.Text.Length; i++)
 {
 characterHighlightGeometry = FormattedText.BuildHighlightGeometry(new Point(), i, 1);
 CharacterHighlightGeometries.Children.Add(characterHighlightGeometry);
 }
</code></pre>

BuildGeometry() only includes the actual path geometry of a character. BuildHighlightGeometry() generates the outer bounds of all characters--including
spaces, so an index to a space can be located by:

<pre><code> foreach (var c in CharacterHighlightGeometries.Children)
 {
 if (c.Bounds.Contains(centerpoint))
 {
 q = c;
 cpos = index;
 break;
 }
 index++;
 }
</code></pre>

Hope this helps.

I'm rendering text using <code>FormattedText</code>, but there does appear to be any way to perform per-char hit testing on the rendered output. It's read-only, so I basically only need selection, no editing.

I'd use <code>RichTextBox</code> or similar, but I need to output text based on control codes embed in the text itself, so they don't always nest, which makes building the right Inline elements very complex. I'm also a bit worried about performance with that solution; I have a large number of lines, and new lines are appended often.

I've looked at <code>GlyphRun</code>, it appears I could get hit-testing from it or a related class, but I'd be reimplementing a lot of functionality, and it seems like there should be a simpler way...

Does anyone know of a good way to implement this?

What's a good way to perform hit testing on a FormattedText?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我使用FormattedText呈现文本，但似乎确实有任何方法可以在呈现的输出上执行按字符命中测试。它是只读的，所以我基本上只需要选择，不需要编辑。我会使用RichTextBox或类似的代码，但我需要根据文本本身中嵌入的控制代码来输出文本，这样它们就不会总是嵌套，这使得构建正确的内联元素非常复杂。我还有点担心该解决方案...

问在FormattedText上执行命中测试的好方法是什么？
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在FormattedText上执行命中测试的好方法是什么？EN