[Development] QKeySequenceEdit: Unable to assign tab

[Laszlo Papp]

I debugged this a bit further. It looks like bool
QKeySequence::event(QEvent *e); is hit for the tab key, but then
QKeySequence::keyPressEvent(QKeyEvent *e); is not.

I also checked all other GUI elements in the above code with My* subclasses
and none of those get the tab key under their event handlers. It has been
becoming more and more clear to me that this is a bug. Because it does get
the event, it just does not utilise it properly. Any clue why
QKeySequence::event(QEvent *e); does not make it into
QKeySequence::keyPressEvent(QKeyEvent *e); like all other keys? If I call
keyPressEvent manually, it obviously works better, but not sure what the
right solution is.

#include <QApplication>

#include <QKeyEvent>

#include <QKeySequenceEdit>

#include <QVBoxLayout>



#include <iostream>



class MyWidget : public QWidget

{

  public:

    MyWidget() = default;

    ~MyWidget() = default;



    bool event(QEvent *e) override {

      if (e->type() == QEvent::KeyPress) {

        QKeyEvent *ke = dynamic_cast<QKeyEvent*>(e);

        std::cout << "TEST WIDGET EVENT KEY: " << ke->key() << std::endl;

      }

      return QWidget::event(e);

    }

};



class MyLayout : public QVBoxLayout

{

  public:

    MyLayout() = default;

    ~MyLayout() = default;



    bool event(QEvent *e) override {

      if (e->type() == QEvent::KeyPress) {

        QKeyEvent *ke = dynamic_cast<QKeyEvent*>(e);

        std::cout << "TEST LAYOUT EVENT KEY: " << ke->key() << std::endl;

      }

      return QLayout::event(e);

    }

};



class MyApplication : public QApplication

{

  public:

    MyApplication(int &argc, char **argv) : QApplication(argc, argv) {}

    ~MyApplication() = default;



    bool event(QEvent *e) override {

      if (e->type() == QEvent::KeyPress) {

        QKeyEvent *ke = dynamic_cast<QKeyEvent*>(e);

        std::cout << "TEST APPLICATION EVENT KEY: " << ke->key() <<
std::endl;
      }

      return QApplication::event(e);

    }

};

class MyKeySequenceEdit : public QKeySequenceEdit

{

  public:

    MyKeySequenceEdit() = default;

    ~MyKeySequenceEdit() = default;



    bool event(QEvent *e) override {

      if (e->type() == QEvent::KeyPress) {

        QKeyEvent *ke = dynamic_cast<QKeyEvent*>(e);

        std::cout << "TEST KEY SEQUENCE EDIT EVENT KEY: " << ke->key() <<
std::endl;
      }

      return QKeySequenceEdit::event(e);

    }



    void keyPressEvent(QKeyEvent *e) override {

      std::cout << "TEST KEY SEQUENCE EDIT KEY PRESS EVENT KEY: " <<
e->key() << std::endl;
      QKeySequenceEdit::keyPressEvent(e);

    }

};



int main(int argc, char *argv[])

{

  MyApplication app(argc, argv);

  MyWidget mainWindow;



  QVBoxLayout* layout = new MyLayout;



  // If I comment the first out, I can assign tab to keySequenceEdit2

  QKeySequenceEdit* keySequenceEdit = new MyKeySequenceEdit();

  layout->addWidget(keySequenceEdit);



  QKeySequenceEdit* keySequenceEdit2 = new MyKeySequenceEdit();

  layout->addWidget(keySequenceEdit2);



  mainWindow.setLayout(layout);

  mainWindow.show();

  return app.exec();

}

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