Custom menu on QTextEdit inherited class

LauraB

I've created a class that inherits from QTextEdit (public inheritance).

In the constructor, I would like to link the signal customContextMenuRequested with a slot of mine so I can custom the right click menu.

I wrote this :

this->setContextMenuPolicy(Qt::CustomContextMenu);
connect(this, SIGNAL(customContextMenuRequested(const QPoint &pos)), this, SLOT(onRightClick(const QPoint &pos)));

At run-time, I get this error :

QObject::connect: No such signal COwnTextEdit::customContextMenuRequested(const QPoint &pos)

I've tried to look around and the two main reasons it's usually not working are : setContextMenu(Qt::CustomContextMenu) forgotten OR Macro Q_OBJECT forgotten

I'm not fallin in those pitfalls currently, and I have no clue why this is not working.

I've tried this as well :

connect(this, SIGNAL(QTextEdit::customContextMenuRequested(const QPoint &pos)), this, SLOT(onRightClick(const QPoint &pos)));

But it doesn't work either.

Thanks a lot

Class declaration

#ifndef MYTEXTEDIT_H
#define MYTEXTEDIT_H

#include <QWidget>
#include <QTextEdit>

using namespace std;

class MyTextEdit : public QTextEdit
{
    Q_OBJECT

public:

    explicit MyTextEdit(bool displayLines, QWidget *_parent = 0);

    ~MyTextEdit();
signals:
public slots:
    void onRightClick(const QPoint &point);

private slots:
    void highlightCurrentLine();

};

#endif // MYTEXTEDIT_H

And I don't think I have to declare the signal customContextMenuRequested as it's already declared in QWidget : http://doc.qt.io/qt-5/qwidget.html#customContextMenuRequested

The constructor :

MyTextEdit::MyTextEdit(bool displayLines, QWidget *_parent) :
    QTextEdit(_parent)
{
    highlightCurrentLine();
    this->setContextMenuPolicy(Qt::CustomContextMenu);
    // I Also tried
    //connect(this, SIGNAL(QWidget::customContextMenuRequested(const QPoint &pos)), this, SLOT(onRightClick(const QPoint &pos)));
    //connect(this, SIGNAL(QTextEdit::customContextMenuRequested(const QPoint &pos)), this, SLOT(onRightClick(const QPoint &pos)));

    connect(this, SIGNAL(customContextMenuRequested(const QPoint &pos)), this, SLOT(onRightClick(const QPoint &pos)));

}

Peer Schneider

Customizing a context menu for a QTextEdit is done by reimplementing the createStandardContextMenu() method of the QTextEdit. This method is virtual and therefore your reimplemented version gets called.

See the documentation to QTextEdit::contextMenuEvent: " ... If you want to customize the context menu, reimplement this function. If you want to extend the standard context menu, reimplement this function, call createStandardContextMenu() and extend the menu returned. ... "

VRonin

could you try the Qt5 connection syntax?
connect(this, &MyTextEdit::customContextMenuRequested, this, &MyTextEdit::onRightClick);

In general, btw, you should not specify const refgerence inside SIGNAL and SLOT macros, you just slow down the connect process as the will be converted into the by-value version (e.g. const QPoint &pos will be converted to QPoint)

LauraB

Both your answers are really helpful and helped me a great deal.
I wasnt familiar with that qt5 syntax for connect, and I didn't notice about reimplementing contextMenuEvent.

Really, thank you guys