QScintilla: How to add a user context menu to textEdit? (C++) - c++

Question

I'm struggeling with telling a QScitilla textEdit that is the main widget of my MainWindow app to accept showing a personalized context menu on right-clicking the mouse.
What works fine if I use a standard Qt5 textEdit fails if used with the QScintilla alternative. I tried it with defining a user menu from some actions:
void MainWindow::contextMenuEvent(QContextMenuEvent *event)
{
QMenu menu(this);
menu.addAction(cutAct);
menu.addAction(copyAct);
menu.addAction(pasteAct);
menu.exec(event->globalPos());
}
#endif // QT_NO_CONTEXTMENU
reacting on QContextMenuEvent, but the menu only shows up when I right-click an element of the MainWindow instead of the QScintilla textEdit. When I do within the textEdit, only the standard cut/copy/paste menu is shown.
How to implement that for QScintilla textEdit?

Answer 1

There are two methods:
Method 1: set Qt::CustomContextMenu for context menu policy of QScintilla text edit :
textEdit->setContextMenuPolicy( Qt::CustomContextMenu );
connect(textEdit, SIGNAL(customContextMenuRequested(const QPoint &)),
this, SLOT(ShowContextMenu(const QPoint &)));
}
void MainWindow::ShowContextMenu(const QPoint &pos)
{
QMenu contextMenu(tr("Context menu"), this);
QAction action1("Action 1", this);
connect(&action1, &QAction::triggered, this, []{
qDebug() << "On action 1 click !!!";
});
contextMenu.addAction(&action1);
contextMenu.exec(mapToGlobal(pos));
}
Method 2: Define a subclass of QScintilla then redefine the override function contextMenuEvent :
class MyQsciScintilla : public QsciScintilla
{
Q_OBJECT
public:
explicit MyQsciScintilla(QWidget *parent = nullptr);
void contextMenuEvent(QContextMenuEvent *event);
//....
};
void MyQsciScintilla::contextMenuEvent(QContextMenuEvent *event)
{
QMenu *menu = createStandardContextMenu();
menu->addAction(tr("My Menu Item"));
//...
menu->exec(event->globalPos());
delete menu;
}