Delete a DockWidget:

[A Former User]

I wrote:

QSharedPointer < QDockWidget > dock = QSharedPointer < QDockWidget > ( new QDockWidget(this));
        
       
        dock->setMinimumWidth(500);
        dock->setMaximumWidth(500);
        dock->setMinimumHeight(500);
        dock->setMaximumHeight(500);

        //creo un grafico che contiene i dati di graph4
         
        
        QCustomPlot a = new QCustomPlot(dock);
dock->setAttribute(Qt::WA_DeleteOnClose);

When I pass dock to QCustomPlot a I have an errore...I would like delete the dock when I close it and delete all the elements inside when I close the dock

[SGaist]

Hi,

What error do you have ?

Why are you setting the dock widget as parent rather than set the chart on the dock widget ?

[A Former User]

@SGaist I have an error in build because dock is a parent of QCustomPlot a..dock must be a parent of a because when I delete dock also a must be deleted

[SGaist]

The right way to proceed is to use QDockWidget::setWidget.

[A Former User]

@SGaist but if I write in this way "a" becomes a child of dock?anyway QCustomPlot wants a parent, without parenthys I have an errore in build

[SGaist]

Becoming a child like that or being set are two different concept even if the second usually means that the widget becomes a child there are more to it.

And no, QCustomPlot doesn't want a parent but you can pass it one if you want. The parent parameter has a default value as most of QWidget based classes.