在 QTextEdit 中更改文本

Changing text in a QTextEdit

本文关键字：文本 QTextEdit      更新时间：2023-10-16

嗨，我正在尝试创建一个功能来扫描QTextEdit，搜索电子邮件地址和电话号码并将其更改为粗体。当我运行它时，它会崩溃我的程序并出现错误"QTextCursor：：setPosition：位置'-1'超出范围"，这是代码：

void MakeDisplay::processDoc(){
    QString doc = text->toPlainText();
    QTextCursor cursor = text->textCursor();
    QTextCharFormat format;
    format.setFontWeight(75);
    QRegExp emails("*.@.*");
    QRegExp phoneNums
    ("(\d{3}-\d{3}-\d{4})(\d{3}-\d{7})(\d{10})(\(\d{3}\)\d{3}-\d{4})(\(\d{3}\)\d{7})");
    int i, j;
    i = 0;
    j = 0;
    while (!cursor.atEnd() || (i != doc.size())){
        i = doc.indexOf(emails);
        j = doc.indexOf(phoneNums);
        cursor.setPosition(i,QTextCursor::MoveAnchor);
        cursor.setPosition(i, QTextCursor::KeepAnchor);
        cursor.mergeCharFormat(format);
        cursor.setPosition(j,QTextCursor::MoveAnchor);
        cursor.setPosition(j, QTextCursor::KeepAnchor);
        cursor.mergeCharFormat(format);
        i++;
        j++;
    }
}

您需要搜索，直到找不到更有趣的内容：

void MakeDisplay::processDoc(){
    QString doc = text->toPlainText();
    QTextCursor cursor = text->textCursor();
    QTextCharFormat format;
    format.setFontWeight(75);
    QRegExp emails("*.@.*");
    QRegExp phoneNums
    ("(\d{3}-\d{3}-\d{4})(\d{3}-\d{7})(\d{10})(\(\d{3}\)\d{3}-\d{4})(\(\d{3}\)\d{7})");
    int i, j;
    i = 0;
    j = 0;
    while (!cursor.atEnd()&& (i!=-1||j!=-1))
    {
        if(i!=-1)
        {
           i = doc.indexOf(emails);
           if(i!=-1)
           {       
              cursor.setPosition(i,QTextCursor::MoveAnchor);
              cursor.setPosition(i, QTextCursor::KeepAnchor);
              cursor.mergeCharFormat(format);
              ++i;
           }
        }
        if(j!=-1)
        {
           j = doc.indexOf(phoneNums);
           if(j!=-1)
           {
              cursor.setPosition(j,QTextCursor::MoveAnchor);
              cursor.setPosition(j, QTextCursor::KeepAnchor);
              cursor.mergeCharFormat(format);
              ++j;
           }
    }
}
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