QMdiArea problem

[walito]

Hi, people, it's my firt post.
Im newbie, and Im problem with QMdiArea.

MdiChild::MdiChild()
{
    setAttribute(Qt::WA_DeleteOnClose);
    isUntitled = true;
}

MdiChild::MdiChild()
{
    setAttribute(Qt::WA_DeleteOnClose);
    isUntitled = true;
}

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mdiArea = new QMdiArea;
    setCentralWidget(mdiArea);
 
    MdiChild *child = new MdiChild;
    mdiArea.addSubWindow(child);
    //mdiArea->addSubWindow(child);

mdiArea = new QMdiArea;
    setCentralWidget(mdiArea);

    MdiChild *child = new MdiChild;
    mdiArea.addSubWindow(child);
    //mdiArea->addSubWindow(child);

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anyone of the 2 options not found.
The error is: 'addSubWindow' has not been declared.

Im not understand, somebody help me?

Sorry my english.
Thz

Walter

[marcel]

You will have to post some more code.
One error though: mdiArea seems to be a pointer, therefore its members must be accessed with "->".

The error could have any number of reasons.

Also, what base class has MdiChild? Is it QMdiSubWindow? Then you should call the base class constructor in the MdiChild's constructor initializer list.

Post the entire code, if you can.

Regards

[walito]

Sorry, The code is:

main.c

#include <QApplication>
#include "mdiwindow.h"
#include "main.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MiMDI *ventana;
 
    ventana = new MiMDI;
    ventana->show();
 
    return app.exec();
}

#include <QApplication>
#include "mdiwindow.h"
#include "main.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MiMDI *ventana;
    
    ventana = new MiMDI;
    ventana->show();

    return app.exec();
}

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mdiwindow.cpp

#include <QtGui> 
#include <QMdiArea>
#include "mdiwindow.h"
#include "childwindow.h"
 
MiMDI::MiMDI(QWidget *parent)
{
	//setupUi(this);
 
    mdiArea = new QMdiArea;
    setCentralWidget(mdiArea);
    setWindowTitle(tr("MDI Editor"));
 
	connect( menuArchivo, SIGNAL(activated(int)), this, SLOT(actionSalir()) );
}
 
void MiMDI::actionSalir()
{
    MdiChild *child = new MdiChild;
    mdiArea.addSubWindow(child);    
    //child->show();
}

#include <QtGui> 
#include <QMdiArea>
#include "mdiwindow.h"
#include "childwindow.h"

MiMDI::MiMDI(QWidget *parent)
{
	//setupUi(this);
	
    mdiArea = new QMdiArea;
    setCentralWidget(mdiArea);
    setWindowTitle(tr("MDI Editor"));
    
	connect( menuArchivo, SIGNAL(activated(int)), this, SLOT(actionSalir()) );
}

void MiMDI::actionSalir()
{
    MdiChild *child = new MdiChild;
    mdiArea.addSubWindow(child);    
    //child->show();
}

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mdiwindow.h

#ifndef __MDIWINDOW_H__
#define __MDIWINDOW_H__
 
#include <QMdiArea>
#include "ui_mdi.h"
 
//class QMdiArea;
 
class MiMDI : public QMainWindow, private Ui::VentanaPrincipal
{
	Q_OBJECT
 
	public:
		MiMDI(QWidget *parent = 0);
 
	public slots:
		void actionSalir();
 
	private:
		QMdiArea *mdiArea;
};
 
#endif // __MDIWINDOW_H__

#ifndef __MDIWINDOW_H__
#define __MDIWINDOW_H__

#include <QMdiArea>
#include "ui_mdi.h"

//class QMdiArea;

class MiMDI : public QMainWindow, private Ui::VentanaPrincipal
{
	Q_OBJECT
	
	public:
		MiMDI(QWidget *parent = 0);
	
	public slots:
		void actionSalir();
		
	private:
		QMdiArea *mdiArea;
};

#endif // __MDIWINDOW_H__

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childwindow.cpp

#include <QtGui>
#include "childwindow.h"
 
MdiChild::MdiChild()
{
    setAttribute(Qt::WA_DeleteOnClose);
    isUntitled = true;
}
// place your code here

#include <QtGui>
#include "childwindow.h"

MdiChild::MdiChild()
{
    setAttribute(Qt::WA_DeleteOnClose);
    isUntitled = true;
}
// place your code here

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chilwindow.h

#ifndef __CHILDWINDOW_H__
#define __CHILDWINDOW_H__
 
class MdiChild
{
    Q_OBJECT
 
public:
    MdiChild();
};
 
#endif // __CHILDWINDOW_H__

#ifndef __CHILDWINDOW_H__
#define __CHILDWINDOW_H__

class MdiChild
{
    Q_OBJECT

public:
    MdiChild();
};

#endif // __CHILDWINDOW_H__

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It's all.

Im used -> but the error is:
no matching function for call to QMdiArea::addSubWindow(MdhChild*&)

Thz

[marcel]

First, derive MdiChild from QWidget not QObject.
If you look at the addSubWindow function signature, it requires a QWidget, not a QObject.

In actionSalir, mdiArea is a pointer so you need:

mdiArea->addSubWindow( mdiChild );

mdiArea->addSubWindow( mdiChild );

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The error is because there is not function addSubWindow in QMdiArea that takes a QObject(here a MdiChild|) parameter. You need a QWidget or a QWidget subclass.

Regards