C++ (Cpp) QFont::insertSubstitution示例

CodeArea::CodeArea(QWidget *parent)
    :QPlainTextEdit(parent)
    ,highlighter(this->document())
{
    QFont font;
    font.setFamily("Courier");
    font.setFixedPitch(true);
    font.setPointSize(10);
    font.insertSubstitution("	","    ");
    setFont(font);
    setWordWrapMode(QTextOption::NoWrap);

    lineNumberArea = new LineNumberArea(this);
    connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(updateLineNumberAreaWidth(int)));
    connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(updateLineNumberArea(QRect,int)));
    connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));

    updateLineNumberAreaWidth(0);
    highlightCurrentLine();
    mCompleter = new QCompleter(this);
    mCompleter->setModel(new QStringListModel(mWordList, mCompleter));
    mCompleter->setModelSorting(QCompleter::CaseSensitivelySortedModel);
    mCompleter->setCaseSensitivity(Qt::CaseSensitive);
    mCompleter->setWrapAround(false);

    mCompleter->setWidget(this);
    mCompleter->setCompletionMode(QCompleter::PopupCompletion);
    mCompleter->setCaseSensitivity(Qt::CaseInsensitive);
    QObject::connect(mCompleter, SIGNAL(activated(QString)),
                  this, SLOT(insertCompletion(QString)));

    connect(this,SIGNAL(textChanged()), this, SLOT(onTextChange()));
}