[solved] Delete all Items from Layout

QT-static-prgm

I need your help again.
I have an Dialog with an QVBoxLayout. I'll add QHBoxLayouts with Labels and Spinbox to the QVboxLayout with an function. How can i delete all Items when the dialog is deleted??
In my case the Dialog's destructor deletes the QVBoxLayout. But all other layouts with the objects i added in the function will not be deleted. How can i do that?? I looked for an property to make the layout delete all items in the destructor, but i haven't found such an property.

mrjj

@QT-static-prgm

Have you tried to set the parent of the inserted widgets to the dialog ?
(not sure it works)

Alternatively you could kill em all

#include<QLayoutItem>
void remove ( QLayout* layout )
{
    QLayoutItem* child;
    while ( layout->count() != 0 ) {
        child = layout->takeAt ( 0 );
        if ( child->layout() != 0 ) {
            remove ( child->layout() );
        } else if ( child->widget() != 0 ) {
            delete child->widget();
        }

        delete child;
    }
}

from dialog
remove ( ui->gridLayout );

Note:
Im not sure its the best way to do it but it does show how to delete them all :)

QT-static-prgm

I tried to add the widget as parent, but i'm not sure if it'll delete everything. How can i check that??

mrjj

@QT-static-prgm
Well make a new widget that inherited a button and place it in your layout,
and place a break point in its destructor.

How did you know before it did not get deleted?

QT-static-prgm

well i have this function:

void SellHouseDialog::addStreet(QString name, int house)
{
	QHBoxLayout* hLayout = new QHBoxLayout(this);

	// set Streetname
	hLayout->addWidget(new QLabel(name, this));

	// setup the spinbox
	QSpinBox* box = new QSpinBox(this);
	box->setRange(0, house);
	box->setValue(house);
	hLayout->addWidget(box);

	ui->contentContainer->addLayout(hLayout);

}

and the documentation of the QVBoxLayout's destructor says
"Destroys this box layout.

The layout's widgets aren't destroyed."

So i know that they were not deleted ;) I added the widget as parent, and run with the debugger through the whole destructor (much time later) the destructor from QLable and QSpinbox where called. So now i know that everything is cleaned up :D

Thank you very much

mrjj

Ok super
so parent(ing) did work.

I was not sure so good you report back so I learn new stuff too.

Heh yeah, debugging the whole shutdown is many steps :)

Have a nice evening

QT-static-prgm

@mrjj

yes debugging the whole destructor are many steps. My F11 key is still blazing.

ähm and it's afternoon for me :D but thanks