How to use QWidget from a class "B" in QStackedWidget in class "A"

depecheSoul

Hello. Hope you can help me with my little problem.

I have created a QWidget in class "B", now I want to display that QWidget in a class "A" within a QStackedWidget.

Can you please give me an example how to do this.

Thank yout

giesbert

Hi,

I don't understand your question, can you please rephrase it?

I make a guess:

You implemented a class B (which is derived from QWidget).

You implement a class A which is also derived from QWidget and which has a child QStackedWidget.

you want to show an instance of B inside this stacked widget.

Is that right?

stima_ua

@
class ICreator {
public:
virtual QWidget* factoryMethod() = 0;
};

class ConcreteCreator : public ICreator {
public:
QWidget* factoryMethod() {
return new QWidget;
}
};

class Client
{
private:
QStackedWidget *stack;
ConcreteCreator *creator;

    void addToStack()
    {
        QWidget* w = creator->factoryMethod();

        if ( !w ) //like { qDebug() << "Creator can not create widget"; return; }

        stack->addWidget(w); // <-- you can see after that qDebug() << w->parent(); will be

//stack you dont need delete w;
}
}

@

p.s. See more factory method or creational patterns.

depecheSoul

[quote author="Gerolf" date="1327334164"]Hi,

I don't understand your question, can you please rephrase it?

I make a guess:

You implemented a class B (which is derived from QWidget).

You implement a class A which is also derived from QWidget and which has a child QStackedWidget.

you want to show an instance of B inside this stacked widget.

Is that right?[/quote]

Yes that is rigth.

stima_ua

Oo...you just need read some book about OOP.

@
#include "B.h"

class A : public QWidget {
private:
//First impl if you want to know about b all time;
B *b; //or B b; -- if you don't want to dynamically create instance of B;

     QStackedLayout *stack;   //your stack

 public:
    A() : b(new B()), stack(new QStackedLayout(this)) {}

    void foo()
    {
        stack->addWidget(b);

        //or second impl if you don't want to know about b all time
        stack->addWidget(new B());
    }

};
@