error:invalid use of undefined type 'struct QWorkspace'

[LiCodeX]

hi,

idk if somebody has tried this before, but I had first time opportunity to use Qworkspace API in my program and the compiler is throwing out this puzzling error each time::
error:invalid use of undefined type 'struct QWorkspace'

I've included the required QWorkspace header file properly in my header file, but still I'm getting this error, code snippets are as follows:
Header file snippet is::

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
class QWorkspace;
 
class MainWindow : public QMainWindow
{
	Q_OBJECT
public:
	MainWindow();
private:
	QWorkspace *workspace;
 
};
#endif

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class QWorkspace;

class MainWindow : public QMainWindow
{
	Q_OBJECT
public:
	MainWindow();
private:
	QWorkspace *workspace;

};
#endif

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CPP file snippet is ::

#include <QtGui>
 
#include "test.h"
 
MainWindow::MainWindow()
{
	workspace = new QWorkspace;
	setCentralWidget(workspace);
 
                /*some stupid code of application*/
 
}

#include <QtGui>

#include "test.h"

MainWindow::MainWindow()
{
	workspace = new QWorkspace;
	setCentralWidget(workspace);
	
                /*some stupid code of application*/

}

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is there anything I'm missing out in that?



Thanks

[jpn]

Are you sure this is exactly the same code you were compiling? It's just that I can't see anything syntactically wrong and the includes sure are sufficient...

[momesana]

The following code which is infact the above classes put in a single file compiles and executes just fine on my system.

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
class QWorkspace;
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
private:
    QWorkspace *workspace;
 
};
#endif 
 
 
#include <QtGui>
 
MainWindow::MainWindow()
{
    workspace = new QWorkspace;
    setCentralWidget(workspace);
 
                /*some stupid code of application*/
 
} 
 
int main(int argc, char **argv)
{
	QApplication app(argc, argv);
	MainWindow mw;
	mw.show();
	return app.exec();
}
 
#include "main.moc"

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
class QWorkspace;
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
private:
    QWorkspace *workspace;
 
};
#endif 
 
 
#include <QtGui>

MainWindow::MainWindow()
{
    workspace = new QWorkspace;
    setCentralWidget(workspace);
    
                /*some stupid code of application*/
 
} 

int main(int argc, char **argv)
{
	QApplication app(argc, argv);
	MainWindow mw;
	mw.show();
	return app.exec();
}

#include "main.moc"

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[LiCodeX]

Thanks jpn and momesana for your quick and helpful replies.
Actually it worked out later on, i don't know what was the problem initially when I was compiling it, but it got compiled well, after giving it second shot.
I guess may be there was linking libraries problem with the Makefile I created on my own >:<

Thanks and Regards

[jpn]

I guess may be there was linking libraries problem with the Makefile I created on my own

Wow, does somebody still write makefiles by hand these days. Why not use qmake which would do it for you?

[LiCodeX]

Wow, does somebody still write makefiles by hand these days. Why not use qmake which would do it for you?

yeah it was unnecessary futile attempt to get it done on my own.
sometimes getting word done by easy utility bothers me a bit


Thanks