Can i multiply inherite from QGraphicsItem and QHBoxLayout?

opengpu

can i multiply inherite from QGraphicsItem and QHBoxLayout?
i tried, and then I add this "layout" on a dialog, and then set this dialog to QGraphicsProxyWidget by setWidget().
but overriden pain(), mousePressEvent() and so on does not work...
ps. if i can't inherite from QGraphicsItem and QHBoxLayout, so how should i do if i want to add some controls on the QGraphicsItem as well as the background can be painted by myself.

opengpu

i tried inherite from QWidget and QGraphicsItem, but there seems to have many ambiguis func with same name...

vikaspachdha

What's wrong with composition? Inheritance is not a solution to everything. To get a flying rat one should not have a class inherited from rat and wings rather wings should be composed in inheritance of rat.

opengpu

but i don't know whether a QHBoxLayout can be added into a QGraphicsItem...
what i need is to render the QGraphicsItem as background as well as some controls(eg.label, editbox, etc) on it. what is the best way to do this?
thank you.

vikaspachdha

@
QApplication a(argc, argv);

QGroupBox *groupBox = new QGroupBox("Contact Details");
QLabel *numberLabel = new QLabel("Telephone number");
QLineEdit *numberEdit = new QLineEdit;

QFormLayout *layout = new QFormLayout;
layout->addRow(numberLabel, numberEdit);
groupBox->setLayout(layout);

QGraphicsScene scene;
QPixmap pixmap(600,200);
pixmap.fill(Qt::blue);
QGraphicsPixmapItem* pixmapItem = scene.addPixmap(pixmap);
QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget(pixmapItem);
proxy->setWidget(groupBox);

QGraphicsView view(&scene);
view.show();

return a.exec&#40;&#41;;

@

I hope this gives you an idea.

opengpu

thank you, and i will try.
what i want is in this link: "":http://qt-project.org/forums/viewthread/45769/
and as the code u give, i can get the item in the big rect node...but how can i add many item as ur code together in the big rect node? and these item would better to be on sth like the "layout"

opengpu

i tried ur code, have a problem...pixmap.fill(Qt::blue); seems meanless..cause the whole rect have covered by the layout...
BTW, as i said above, actually i want to use the QGraphicsItem as a backgound where i can add some controls on it. meanwhile, when i click the area which is not covered by the controls but on the QGraphicsItem, i want to handle the mouse event in my custom QGraphicsItem class(or can i get this through set some controls disable?)
thank you

opengpu

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