如何在Qt中使用QSyntaxHighlighter类在QML TextEdit上实现富文本逻辑？ [英] How to implement rich text logic on QML TextEdit with QSyntaxHighlighter class in Qt?

问题描述

我有一个TextEdit在我的QML文件，我有一个QSyntaxHighlighter C ++类。我想在C ++类中指定突出显示的逻辑，并将其应用到TextEdit，但我不知道如何使QML对象和C ++类之间的连接。你还可以提供一些示例代码吗？我找不到如何使用Qt文档实现它。

I have a TextEdit in my QML file and I have a QSyntaxHighlighter C++ class. I want to specify the highlighting logic in the C++ class and apply it to the TextEdit, but I am not sure how to make the connection between the QML object and the C++ class. Can you also please provide some sample code? I couldn't find how to implement it with the Qt documentation.

推荐答案

如果有人需要更详细的解释。
首先，我在自定义C ++类中创建了一个 Q_PROPERTY 。 / p>

In case someone needs a more detailed explanation for this. First, I created a Q_PROPERTY inside a custom C++ class.

Q_PROPERTY(QQuickTextDocument* mainTextEdit READ mainTextEdit WRITE setMainTextEdit NOTIFY mainTextEditChanged)

然后我将 textEdit.textDocument 分配给 Q_PROPERTY 。

customClass.mainTextEdit = textEdit.textDocument

然后我调用 initHighlighter c>（该函数必须是 Q_INVOKABLE ）在我的QML中调用我的荧光笔类的构造函数，并传递 textEdit 的文本文档， a>。

Then I call initHighlighter() (the function has to be Q_INVOKABLE) in my QML which calls the constructor of my highlighter class and passes it the text document of the textEdit.

void initHighlighter()
{
Highlighter *highlighter;
highlighter = new Highlighter(m_mainTextEdit->textDocument());
}

注意：自定义高亮显示类需要从 QSyntaxHighlighter 。

Note: The custom highlighter class needs to be derived from QSyntaxHighlighter.

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