qt实现文本高亮

重载QSyntaxHighlighter的highlightBlock

void MyHighlighter::highlightBlock(const QString &text)

{

QTextCharFormat myClassFormat;

myClassFormat.setFontWeight(QFont::Bold);

myClassFormat.setForeground(Qt::darkMagenta);

QString pattern = "\\bMyA-Za-z+\\b";

QRegExp expression(pattern);

int index = text.indexOf(expression);

while (index >= 0) {

int length = expression.matchedLength();

setFormat(index, length, myClassFormat);

index = text.indexOf(expression, index + length);

}

}

调用方式：

QTextEdit *editor = new QTextEdit;

MyHighlighter *highlighter = new MyHighlighter(editor->document());