Eventfilter Problem

[codeman]

Hello friends,

I have a question. I have a 2 Qmainwindow. I put the one in the other as centralwidget to achieve the full height of the left and the right Dockwidget.I now have an outer QMainWindow and an inner QMainwindow. Then I add a buttomdockwidget with a textedit to inner QMainwindow. I would like to handle the event in the outer QMainwindow (

MainWindow::eventFilter(QObject *obj, QEvent *event)

MainWindow::eventFilter(QObject *obj, QEvent *event)

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) and I intall it

this->mytextedit->installEventFilter(this);

this->mytextedit->installEventFilter(this);

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By this I mean the outer QMainwindow. So now when I hit a "s" for example I have an output like this "ss". It doubles my input.

Where is the misunderstanding of mine here?

Thanx in advance

[wysota]

What code did you put in the event filter?

[codeman]

//qDebug() << Q_FUNC_INFO << obj;
    int keyInt(0);
    Qt::Key key;
    QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
    keyInt = keyEvent->key();
    key = static_cast<Qt::Key>(keyInt);
 
 
 
 
    if (event->type() == QEvent::KeyPress)
    {
        if(key == Qt::Key_unknown)
        {
            return true;
        }
        if( key == Qt::Key_Control   ||
            key == Qt::Key_Shift    ||
            key == Qt::Key_Alt      ||
            key == Qt::Key_Meta         )
        {
            return true;
        }
        Qt::KeyboardModifiers modifiers = keyEvent->modifiers();
        QString keyText = keyEvent->text();
        qDebug() << "KEyTExt: " << keyText;
        if(modifiers & Qt::ShiftModifier)
            keyInt += Qt::SHIFT;
        if(modifiers & Qt::ControlModifier)
            keyInt += Qt::CTRL;
        if(modifiers & Qt::AltModifier)
            keyInt += Qt::ALT;
        if(modifiers & Qt::MetaModifier)
            keyInt += Qt::META;
 
        QString objname     = obj->objectName();
        QString keySequence = QKeySequence(keyInt).toString(QKeySequence::NativeText);
        if(this->_mapShortCutFunctor2.contains(objname) && this->_mapShortCutFunctor2[objname].contains(keySequence) )
        {
            (this->*_mapShortCutFunctor2[objname][keySequence])();
            return true;
        }
    }
    else
    {
    return QMainWindow::eventFilter(obj, event);
    }

//qDebug() << Q_FUNC_INFO << obj;
    int keyInt(0);
    Qt::Key key;
    QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
    keyInt = keyEvent->key();
    key = static_cast<Qt::Key>(keyInt);




    if (event->type() == QEvent::KeyPress)
    {
        if(key == Qt::Key_unknown)
        {
            return true;
        }
        if( key == Qt::Key_Control   ||
            key == Qt::Key_Shift    ||
            key == Qt::Key_Alt      ||
            key == Qt::Key_Meta         )
        {
            return true;
        }
        Qt::KeyboardModifiers modifiers = keyEvent->modifiers();
        QString keyText = keyEvent->text();
        qDebug() << "KEyTExt: " << keyText;
        if(modifiers & Qt::ShiftModifier)
            keyInt += Qt::SHIFT;
        if(modifiers & Qt::ControlModifier)
            keyInt += Qt::CTRL;
        if(modifiers & Qt::AltModifier)
            keyInt += Qt::ALT;
        if(modifiers & Qt::MetaModifier)
            keyInt += Qt::META;

        QString objname     = obj->objectName();
        QString keySequence = QKeySequence(keyInt).toString(QKeySequence::NativeText);
        if(this->_mapShortCutFunctor2.contains(objname) && this->_mapShortCutFunctor2[objname].contains(keySequence) )
        {
            (this->*_mapShortCutFunctor2[objname][keySequence])();
            return true;
        }
    }
    else
    {
    return QMainWindow::eventFilter(obj, event);
    }

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[wysota]

You definitely shouldn't assume you'll only be getting key events in the filter. This code might crash on line #5. What exactly are you trying to do? Why aren't you using QShortCut and QAction objects?

[codeman]

I try to collect all keypressed events or combinations of those in one place, where I can react depending on the object.

Have you a better solution. I am learning by doing. Doing it wrong perhaps helps also to find out the right way;o)).

I am open for any suggestions.

[wysota]

The proper way would be to use a bunch of QAction instances (alternatively QShortcut instances here and there) and enable/disable them depending on the context.

[codeman]

Ok thank you