How to load a Qwidget in groupBox at run time?

[AviMittal]

How to load a Qwidget in groupBox at run time?

Thanks

[Lykurg]

How to load a Qwidget in groupBox at run time?

Thanks

Well, your group box has a layout. Take that and use QLayout::addWidget()...

[AviMittal]

Well, your group box has a layout. Take that and use QLayout::addWidget()...

thanks for rplying. Hey but i tried following......and my program is crashing saying "segmentation fault".

usrCtrl *ptr = new usrCtrl(ui.groupBox);
ui.groupBox->layout()->addWidget(ptr);


Explanation: I created a QWidget class "Tool" where i took a groupBox. i created another Qwidegt named
"usrCtrl". Now what i want to do is to load this usrctrl in the Tool's groupBox at run time.

Please suggest.

[nish]

usrCtrl *ptr = new usrCtrl(ui.groupBox);
QVBoxLayout* layout=new QVBoxLayout;//create this only one time
layout->addWidget(ptr);
ui.groupBox->setLayout(layout);
//after this if u need the layout just call
//ui.groupBox->layout()->addSomething

usrCtrl *ptr = new usrCtrl(ui.groupBox);
QVBoxLayout* layout=new QVBoxLayout;//create this only one time
layout->addWidget(ptr);
ui.groupBox->setLayout(layout);
//after this if u need the layout just call
//ui.groupBox->layout()->addSomething

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edit: correction : layout->addWidget(ptr); instead of layout->addWidget(layout);

[Lykurg]

a) have you set already a layout to your group widget? Which type of layout do you use.
b) what is ui.groupBox->layout() returning?

[nish]

just guessing....

a) have you set already a layout to your group widget? Which type of layout do you use.

Ans. See next Question

b) what is ui.groupBox->layout() returning?

Ans. 0

[AviMittal]

thanks. Actually i am designing the screens by using qt designer. so layout is already applied during screen design. I applied grid layout.
But now i want to load the Qwidget control in a groupbox ( on which layout is already applied at design time) at run time.

[Lykurg]

What's the output of

if (ui.groupBox->layout())
  qWarning() << "valid pointer";
else
  qWarning() << "invalid pointer";

if (ui.groupBox->layout())
  qWarning() << "valid pointer";
else
  qWarning() << "invalid pointer";

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And can we see the relevant part of the ui file

[AviMittal]

hey output is "Invalid ptr".
I checked the code..and layout is applied on complete form
So if u do

ui.gridLayout->addWidget(usrctrl*, row,col)
then it works.
but for that i need to explicitly find out the layout name applied on form. that we can do using layout() funcion call. But i can also add Qwidget to the form.

but the layout option has only following function call
layout()->addWidget(QWidget).
where as i need addWidget(QWidget, row, col)

i need row/col position as well to add the QWidget at the appropriate place on the form.