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我需要按模式创建所有匹配链接QPlainTextEdit，例如：

https://stackoverflow.com/questions/ask b;aaskdfjakjf oasfdjoiasjdas oiajsdj blalvballvlalvllkasln https://google.com/

https://stackoverflow.com/questions/ask和https://google.com/ - 应该成为链接，您可以关注它们。

我使用一个hightlighter类来搜索匹配并更改文本块。

代码：SearchHighLight.h

#ifndef SEARCHHIGHLIGHT_H
#define SEARCHHIGHLIGHT_H

#include <QSyntaxHighlighter>
#include <QRegularExpression>

class SearchHighLight : public QSyntaxHighlighter
{
    Q_OBJECT
    using BaseClass = QSyntaxHighlighter;
public:
    explicit SearchHighLight(QTextDocument* parent = nullptr);
    void searchText(const QString& text, QRegularExpression::PatternOption option);
protected:
    virtual void highlightBlock(const QString &reqularExpressoin) override;
private:
    QRegularExpression m_pattern;
    QTextCharFormat m_format;
};

#endif // SEARCHHIGHLIGHT_H

SearchHighLight.cpp

#include "searchhighlight.h"

SearchHighLight::SearchHighLight(QTextDocument* parent) : BaseClass(parent)
{
    //m_format.setBackground(Qt::green);
}

void SearchHighLight::highlightBlock(const QString& reqularExpressoin)
{
    QRegularExpressionMatchIterator matchIterator = m_pattern.globalMatch(reqularExpressoin);

    m_format.setAnchor(true);
    m_format.setAnchorHref("https://www.google.com/");
    
    while (matchIterator.hasNext())
    {
        QRegularExpressionMatch match = matchIterator.next();
        setFormat(match.capturedStart(), match.capturedLength(), m_format);
    }
}

void SearchHighLight::searchText(const QString& text, QRegularExpression::PatternOption option)
{
    m_pattern = QRegularExpression(text, option);
    rehighlight();
}

尝试：

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    this->setFixedSize(800,600);

    mainW = new QWidget(this);
    mainW->setGeometry(0,0, 800, 600);
    lay = new QGridLayout(mainW);

    te = new QPlainTextEdit(mainW);
    lay->addWidget(te, 1, 1, 1, 6);

    m_searchHighLight = new SearchHighLight(te->document());

    te->setPlainText("https://www.google.com/");

    m_searchHighLight->searchText("(https)(.+)(\\S)", QRegularExpression::NoPatternOption);
}

什么都没发生。评论：

  1. 正则表达式是正确的
  2. 无法使用 html
  3. Highlighter如果使用可以正常工作：m_format.setBackground(Qt::green);

如何QTextCharFormat正确使用使其工作？

4

0 回答 0