how we can access data of one project within other project?

[Rahul Das]

@ w1.show();
w.show();@

This will work.Two different windows will turn up but 'w' will be on top of 'w1' and so w1will be hidden.

Why don't you consider to make one ,the child of other?

[pratik041]

[quote author="sierdzio" date="1323677232"]You've got spaces in your paths (file_testing.pro). That is why qmake understands "Documents" as a file. I don't remember what a remedy for that was in qmake. Try either to enclose the whole path in quotes, or insert '' in front of every space (probably won't work, as '' is used in a different manner in qmake).

Apart from that, I am not sure you can use 2 QMainWindows in a single app (I've never tried to, though. And I can't find anything against it in QMW documentation, so maybe it's OK).[/quote]

I have used two QMainWindow before also. Their is no problem in using that. As you have suggested
i have checked using double quotes but in that case also it is showing error that
@No rule to make target 'path/mainwindow1.cpp' needed by 'debug/mainwindow1.o' . Stop. @
I have checked removing spaces between the path also but i am getting the same error.

[sierdzio]

OK noticed another issue. In your code, you have this (shortened a bit for convenience):
@
SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

HEADERS = test1/mainwindow1.h
SOURCES = test1/mainwindow1.cpp
@

The second invoke of HEADERS and SOURCES is followed by '=', which means it will overwrite previous entries. Try this instead (remember to use your own paths):
@
SOURCES += main.cpp
mainwindow.cpp
test1/mainwindow1.cpp

HEADERS += mainwindow.h
test1/mainwindow1.h
@

[pratik041]

[quote author="sierdzio" date="1323681848"]OK noticed another issue. In your code, you have this (shortened a bit for convenience):
@
SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

HEADERS = test1/mainwindow1.h
SOURCES = test1/mainwindow1.cpp
@

The second invoke of HEADERS and SOURCES is followed by '=', which means it will overwrite previous entries. Try this instead (remember to use your own paths):
@
SOURCES += main.cpp
mainwindow.cpp
test1/mainwindow1.cpp

HEADERS += mainwindow.h
test1/mainwindow1.h
@[/quote]
On changing this i am getting undeclared error.

[goetz]

Do you use shadow builds with Qt Creator?

[Rahul Das]

The code you gave is working for me, except that i changed
the header in the first project 'file_testing' to
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow(){};
};

#endif // MAINWINDOW_H@

I felt, the destructor was improperly positioned ;)

[pratik041]

[quote author="Volker" date="1323688757"]Do you use shadow builds with Qt Creator?[/quote]

yes i used shadow build.

[goetz]

[quote author="pratik041" date="1323690516"]
[quote author="Volker" date="1323688757"]Do you use shadow builds with Qt Creator?[/quote]

yes i used shadow build.[/quote]

Then I'm not 100% sure whether the approach I suggested does actually work as the directory layout is a bit delicate in that case.

[pratik041]

[quote author="Rahul Das" date="1323690185"]The code you gave is working for me, except that i changed
the header in the first project 'file_testing' to
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow(){};
};

#endif // MAINWINDOW_H@

I felt, the destructor was improperly positioned ;)[/quote]

Actually in my code i have used it properly while pasting the destructor is pasted wrongly.
Does you are able to access other project object in your code?

[Rahul Das]

yes. i compiled and its working. I used the relative path. May be you should also try.

[pratik041]

[quote author="Rahul Das" date="1323690185"]The code you gave is working for me, except that i changed
the header in the first project 'file_testing' to
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow(){};
};

#endif // MAINWINDOW_H@

I felt, the destructor was improperly positioned ;)[/quote]
I have tried using relative path but i dont know why the error is coming can you post your code?

[Rahul Das]

The project to be imported is in a folder named 'a spaced folder'.

main.cpp
@#include <QtGui/QApplication>
#include "mainwindow.h"
#include "../a spaced folder/test2/mainwindow1.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
MainWindow1 w1;
w.show();
w1.show();
w1.setWindowTitle("this is imported");
return a.exec();
}@

Header
@
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow(){}
};

#endif // MAINWINDOW_H
@

source
@#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
}
@
@QT += core gui

TARGET = test
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp "../a spaced folder/test2/mainwindow1.cpp"

HEADERS += mainwindow.h "../a spaced folder/test2/mainwindow1.h"@

---

Project to be imported.

pro
@
QT += core gui

TARGET = test2
TEMPLATE = app

SOURCES += main.cpp
mainwindow1.cpp

HEADERS += mainwindow1.h@

header

@#ifndef MAINWINDOW1_H
#define MAINWINDOW1_H

#include <QtGui/QMainWindow>

class MainWindow1 : public QMainWindow
{
Q_OBJECT

public:
MainWindow1(QWidget *parent = 0);
~MainWindow1();
};

#endif // MAINWINDOW1_H@

Source
@#include "mainwindow1.h"

MainWindow1::MainWindow1(QWidget *parent)
: QMainWindow(parent)
{
}

MainWindow1::~MainWindow1()
{
}
@

main.cpp
@#include <QtGui/QApplication>
#include "mainwindow1.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow1 w;
w.show();

return a.exec();

}@