Qt設置制表符為4個空格

const int tabSotp = 4;

QsciScintilla* editor = new QsciScintilla;
QFontMetrics metrics(editor -> font());
editor -> setTabWidth(tabSotp * metrics.width(' '));

QTextBrowser* resultBrowser = new QTextBrowser;
resultBrowser -> setTabStopWidth(tabSotp * metrics.width(' '));