insert a widget into a group "on-the-fly"

i need to insert objects into a groupbox dynamically, but somehow they dont appear...
i tried this so far:
first:

Code:

---

KURLLabel *label = new KURLLabel(secGroup, "test");
		label->setText("woooha"));

---

then

Code:

---

KURLLabel *label = new KURLLabel(secGroup, "test");
		QGridLayout *layo = new QGridLayout(secGroup->layout());
		layo->addWidget( label, 0, 0 );
		label->setText("woooha"));

---

the gridlayout actually is there already and has one member before the code is executed...
how would i insert the label, so that it actually is there?
thanks!

not sure if this is what you are looking for but something like this might work:
try implementing your groupbox along theses lines:
(not sure if this code even works, just wrote it off the top of my head) (note the sytax is qt 4.1, 3.x might be different)

----------------groupbox.h---------------
#ifndef GROUPONE_H
#define GROUPONE_H

#include <QGroupBox>

class QLabel;
class QHBoxLayout;

class groupbox : public QGroupBox
{
Q_OBJECT
public:
groupbox(QWidget *parent = 0);
groupbox(QWidget *parent,const QString &text);
public slots:
void addWidget(QWidget *newChild);
private slots:
void display();
private:
QHBoxLayout *mainLayout;
QLabel *labelOne;
};

#endif


-------------groupbox.cpp--------------------
#include <QGroupBox>
#include <QLabel>
#include <QHBoxLayout>
#include <QString>
#include <QWidget>

#include "groupbox.h"

groupbox::groupbox(QWidget *parent) : QGroupBox(parent)
{
display();
}

groupbox::groupbox(QWidget *parent, const QString &text) : QGroupBox(text,parent)
{
display();
}

void groupbox::display()
{
labelOne = new QLabel("wooha");
mainLayout = new QHBoxLayout(this);
mainLayout->addWidget(labelOne);

}

void groupbox::addWidget(QWidget *newChild)
{
mainLayout->addWidget(newChild);
}

----------------------------------------------------------

then the parent widget of your groupbox can send a signal containing the widget you want to add to your groupbox. (or of course call the groupBox::addWidget() function directly)

Also it seems best to either:

1) Create parentless widgets and them add them to a layout using addWidget
2) Create the layout first then specify the layout as the parent in the widget creation.

ex #1)
QLabel *bob = new QLabel;
QLayout *fred = new QLayout(this);
QLayout->addWidget(bob);

ex #2)
QLayout *fred = new QLayout(this);
QLabel *bob = new QLabel(fred);

if instead you create a widget with a parent and then add it to a layout you will see "Widget in wrong parent" notices when you run your application.

ex #bad)
QLabel *bob = new QLabel(this);
QLayout *fred = new QLayout;
QLayout->addWidget(bob);

personally I prefer to create all of my widgets first then create the layouts then add the widgets to the layouts, for organizational purposes.

Katrina

thanks for your replies first of all and sorry for not answering quicker...
it worked real easy actually... :o
i just had to add label->show(); behind my code....
thanks for your help anyway!

Quote:

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Originally Posted by soul_rebel

thanks for your replies first of all and sorry for not answering quicker...
it worked real easy actually... :o
i just had to add label->show(); behind my code....
thanks for your help anyway!

---

lol ok then! :-)
glad I could try to help and then be shot down ;-)
j/k!

Katrina