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;
}




mdiArea = new QMdiArea;
setCentralWidget(mdiArea);

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


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();
}


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();
}


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__


childwindow.cpp


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

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


chilwindow.h


#ifndef __CHILDWINDOW_H__
#define __CHILDWINDOW_H__

class MdiChild
{
Q_OBJECT

public:
MdiChild();
};

#endif // __CHILDWINDOW_H__


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 );


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