initialize child widgets within parent?

[ucomesdag]

Hi, i was wondering if it is possible to initalize a child widget within the parent?
I tried to add it in the constructor of the parent, but then the child widgets is not shown...

In this case i want to initialize fx1 in the constructor of floorBoard... this to keep clean main.

#include "stompBox.h"
#include "floorBoard.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
	floorBoard floor;
 
	stompBox fx1(&floor);
	fx1.setId(0);
	fx1.setImage(":/images/fx1.png");
	fx1.setPos(floor.getPos(0)); 
 
    QComboBox *fx1_comboBox = new QComboBox(&fx1); 
	fx1_comboBox->addItem( "Test 1" ); 
	fx1_comboBox->addItem( "Test 2" ); 
	fx1_comboBox->addItem( "Test 3" );
 
	fx1_comboBox->setGeometry(8, 31, 79, 13);
	fx1_comboBox->setEditable(false);
	fx1_comboBox->setFont(font);
	fx1_comboBox->setPalette(pal);
	fx1_comboBox->setFrame(false);
 
	customButton fx1_button(false, QPoint::QPoint(4, 110), &fx1);
	customLed fx1_led(false, QPoint::QPoint(41, 4), &fx1);
	QObject::connect(&fx1_button, SIGNAL(valueChanged(bool)),
                         &fx1_led, SLOT(setValue(bool)));	
 
	floor.show();
 
    return app.exec();
};

#include "stompBox.h"
#include "floorBoard.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

	floorBoard floor;
	
	stompBox fx1(&floor);
	fx1.setId(0);
	fx1.setImage(":/images/fx1.png");
	fx1.setPos(floor.getPos(0)); 

    QComboBox *fx1_comboBox = new QComboBox(&fx1); 
	fx1_comboBox->addItem( "Test 1" ); 
	fx1_comboBox->addItem( "Test 2" ); 
	fx1_comboBox->addItem( "Test 3" );

	fx1_comboBox->setGeometry(8, 31, 79, 13);
	fx1_comboBox->setEditable(false);
	fx1_comboBox->setFont(font);
	fx1_comboBox->setPalette(pal);
	fx1_comboBox->setFrame(false);

	customButton fx1_button(false, QPoint::QPoint(4, 110), &fx1);
	customLed fx1_led(false, QPoint::QPoint(41, 4), &fx1);
	QObject::connect(&fx1_button, SIGNAL(valueChanged(bool)),
                         &fx1_led, SLOT(setValue(bool)));	

	floor.show();

    return app.exec();
};

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[wysota]

If stompBox is a widget, then it shouldn't be any problem. If it is a dialog, though, you'll have to explicitely call show() or exec() for it. But you can still do the initialisation in the parent -- that's what is usually done, anyway...

[ucomesdag]

It is a widget. But when I do so the widget isn't shown. And if I add .show() it just shown on initialization and disapears inmediatly after

#include "stompBox.h"
#include "floorBoard.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
	floorBoard floor;
	floor.show();
 
    return app.exec();
};

#include "stompBox.h"
#include "floorBoard.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

	floorBoard floor;
	floor.show();

    return app.exec();
};

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#include "floorBoard.h"
 
floorBoard::floorboard((QWidget *parent, ... )
    : QWidget(parent)
{
   ...
 
    stompBox fx1(this);
	fx1.setId(0);
	fx1.setImage(":/images/fx1.png");
	fx1.setPos(this->getPos(0)); 
 
    QComboBox *fx1_comboBox = new QComboBox(&fx1); 
	fx1_comboBox->addItem( "Test 1" ); 
	fx1_comboBox->addItem( "Test 2" ); 
	fx1_comboBox->addItem( "Test 3" );
 
	fx1_comboBox->setGeometry(8, 31, 79, 13);
	fx1_comboBox->setEditable(false);
	fx1_comboBox->setFont(font);
	fx1_comboBox->setPalette(pal);
	fx1_comboBox->setFrame(false);
 
	customButton fx1_button(false, QPoint::QPoint(4, 110), &fx1);
	customLed fx1_led(false, QPoint::QPoint(41, 4), &fx1);
	QObject::connect(&fx1_button, SIGNAL(valueChanged(bool)),
                         &fx1_led, SLOT(setValue(bool)));	
};

#include "floorBoard.h"

floorBoard::floorboard((QWidget *parent, ... )
    : QWidget(parent)
{
   ...

    stompBox fx1(this);
	fx1.setId(0);
	fx1.setImage(":/images/fx1.png");
	fx1.setPos(this->getPos(0)); 

    QComboBox *fx1_comboBox = new QComboBox(&fx1); 
	fx1_comboBox->addItem( "Test 1" ); 
	fx1_comboBox->addItem( "Test 2" ); 
	fx1_comboBox->addItem( "Test 3" );

	fx1_comboBox->setGeometry(8, 31, 79, 13);
	fx1_comboBox->setEditable(false);
	fx1_comboBox->setFont(font);
	fx1_comboBox->setPalette(pal);
	fx1_comboBox->setFrame(false);

	customButton fx1_button(false, QPoint::QPoint(4, 110), &fx1);
	customLed fx1_led(false, QPoint::QPoint(41, 4), &fx1);
	QObject::connect(&fx1_button, SIGNAL(valueChanged(bool)),
                         &fx1_led, SLOT(setValue(bool)));	
};

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[munna]

I think it should be something like

stompBox *fx1 = new stompBox(this);
 fx1->setId(0);
 fx1->setImage(":/images/fx1.png");
 fx1->setPos(this->getPos(0));

stompBox *fx1 = new stompBox(this);
 fx1->setId(0);
 fx1->setImage(":/images/fx1.png");
 fx1->setPos(this->getPos(0));

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[ucomesdag]

Both do the samething, I guess... But that ain't the problem. The widget just flashes 1 time on the screen on initialization and thats it....

[munna]

Yes both do the samething but in your way of declaration the object is destroyed once the program is out of the constructor. Either you have to declare fx1,fx1_button..etc in your class declaration or use them the way you are using fx1_comboBox(as a pointer).

[wysota]

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