Problem displaying my main window

Hi. I've got a question. I have created my main window using designer and translated it into Qt code. So after translations I received a ui_Maker.h file:

http://www.insidetennis.yoyo.pl/ntd.txt

And how can I display this main window (called MainWindow) ?
I tried this in main.cpp:

Code:

---

#include "ui_Maker.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow->show();
    return app.exec();
}

---

but there appear error that MainWindow is undeclared. What did I do wrong? And how can I correct it? Btw. my test.pro file:

Code:

---

CONFIG += qt
HEADERS += ui_Maker.h
SOURCES += main.cpp

---

Regards

Please read Using a Component in Your Application. Pay attention to single and multiple inheritance approaches. The direct approach is pretty inflexible and not suggested.

And what should I type:

Code:

---

#include "ui_Maker.h"
 
int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QDialog *window = new QDialog;
     Ui::ImageDialog ui; // what should I type here, because ImageDialog is an example??
     ui.setupUi(MainWindow); // here I renamed window to MainWindow 
 
     MainWindow->show(); // here I renamed window to MainWindow
     return app.exec();
 }

---

And is anything correct in this main.cpp? Regards

This is the "direct approach" which was suggested against using. But oh well, here goes:

Code:

---

#include "ui_Maker.h"
 
int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QMainWindow *window = new QMainWindow; // create a main window, that's what you have designed
     Ui::MainWindow ui;
     ui.setupUi(window);
     window->show();
     return app.exec();
}

---

PS. Please use the "#"-button for highlighting code blocks.

Ok, so I have done it, but in compiling it, there appear error:

collect2: ld returned 1 exit status
make[1]: *** [release\Test.exe] Error 1
make[1]: Leaving directory `C:/Qt/4.2.3/Qt'
make: *** [release] Error 2

What is wrong?
Regards

What does the .pro file look like? What's the first error?

This is the .pro file

Code:

---

CONFIG += qt
      HEADERS += ui_Maker.h
      SOURCES += main.cpp

---

And this is what appear in console. There are really many errors such as:
in main.cpp - undefined reference to...
and the first error is [release\test.exe] error 1
and second is
[release] error 2

So what's wrong?
Kind regards

Quote:

---

Originally Posted by Salazaar

This is the .pro file

Code:

---

CONFIG += qt
      HEADERS += ui_Maker.h
      SOURCES += main.cpp

---

---

Please follow the directions I already gave you once. There is no need to generate the header and include it to the project by hand. You should be using a variable FORMS instead.

Edit: Clean up the folder. Leave only files main.cpp and Maker.ui. Run "qmake -project" and you'll get a proper project file.

Quote:

---

And this is what appear in console. There are really many errors such as:
in main.cpp - undefined reference to...
and the first error is [release\test.exe] error 1
and second is
[release] error 2

---

Well, you managed to cut the interesting part off. :) "error 1" or "error 2" does not tell anything valuable. Please paste all the errors including the undefined reference.

Maybe he should paste only the first few? ;)

And remember about closing the memory leak when you come to this point :)

Quote:

---

Originally Posted by wysota

Maybe he should paste only the first few? ;)

---

That's what I asked in the first place but it didn't work so I tried another approach.. ;)

Quote:

---

And remember about closing the memory leak when you come to this point :)

---

First of all, I tried to advise against using the direct approach. Anyway, the same leak is also in the example..

Quote:

---

Originally Posted by jpn

Please follow the directions I already gave you once. There is no need to generate the header and include it to the project by hand. You should be using a variable FORMS instead.

---

But if I want to make changes in the maker file, which I can't do in Designer such as connecting tools->sort to another dialog, I have to generate header file and make changes and add it to project by hand. Is that right?
EDIT:
I have generated project file by makefile but there appear the same errors such as:
in main.cpp - undefined reference to _imp__ZN7QString4freeEPNS
What is wrong?
EDIT:
I think this is problem with my Qt installation, because when I try to compile simple application lioke this:

Code:

---

#include <QApplication>
#include <QPushButton>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QPushButton hello("Hello world!");
    hello.resize(100, 30);
 
    hello.show();
    return app.exec();
}

---

There appear errors such as undefined reference to QApplication, QPushButton and the same as in compiling converted ui file
So, I'll ask once again. What's wrong? I have installed Qt to my mingw compiler, set 3 environment variables. I have done it with Marcel's help, so everything should be set.....
Regards
EDIT:
Oh, now everything's ok, I just forgot to include QApplication to main file:D

Quote:

---

Originally Posted by Salazaar

But if I want to make changes in the maker file, which I can't do in Designer such as connecting tools->sort to another dialog, I have to generate header file and make changes and add it to project by hand. Is that right?

---

As the generated header says in the header comment, do never edit them by hand. Your changes will be lost if you ever want do adjust the designed form and the header is generated again. Use either single inheritance or multiple inheritance approach and do the changes in the actual widget/dialog/window class (which loads the designed form).

I really don't understand what is described in this link.

Please use the "code" tag (# button) instead of "qtclass" (Qt button) when pasting code.

So how can I connect other dialogs to my main windows action (it is all done with Qt Designer)

Hopefully this helps:
FAQ: I have two forms. How to open a second form after a button is clicked in the first one?

Ok, thanks, I'll try it. But if I want to make things, which I can't do in Designer, so how can I make these changes without changing code?

Look again at the links JP gave you in post #12.

Hi. I tried to do what's described in http://www.qtcentre.org/forum/faq.ph...esigner_2forms
but I don't know how to do it. I'd be veery thankful if somebody will do it on my code and add comments in the parts of code which were changed:

Dialog file which I want to connect to actionAbout http://www.insidetennis.yoyo.pl/ui_About.txt

And my main window
http://www.insidetennis.yoyo.pl/ui_MainWindow.txt (Attention! The file is called ui_maker.h, not ui_mainwindow.h !!!)

if someone can do it, I'd be very thankful...

Please, consider going through the nice tutorials shipped with Qt, starting from Qt Tutorial 1 - Hello World. We are not here to teach you the basics but to help you with problems you may encounter. ;)

I have C++ GUI Programming with Qt 4 book. And I know something already, but I can't do anything about that, so I will ask you once more, to correct my code ;)

I added this:

Code:

---

void Ui_MainWindow::openUi_Dialog(){
  static Ui_Dialog *Ui_Dialog = new Ui_Dialog(this);
  Ui_Dialog->show();
  Ui_Dialog->activateWindow(); // or form2->setActiveWindow() in Qt3
  Ui_Dialog->raise();
}

---

into Ui_MainWindow class. Is that correctly?
EDIT:
No, it isn't. When I do it I have errors that MainWindow class does not have a member called raise, acitvateWindow and show. Even if I paste it out of this class there are errors:
class Ui-Dialog has no member called raise, show and activateWindow. So how should I do it?

Again with big red characters:

Don't change the code of the class generated by UIC. Subclass along the proper widget class and put additional code there.

There... I hope that makes it clear ;) Oh... and I'm sure it's well explained in the book you mentioned.

Ok, I won't change the code, so how can I connect dialog to actionAbout slot? I'd be satisfied with a code. ;)
Regards
-------------------
Widzę, że nie jestem sam na tym forum ;)

You don't have a dialog. You only have an UI definition. You have to use the definition on a dialog and not on its own. You're asking for code and we're constantly redirecting you to an article that contains the code you ask for. Furthermore GUI Programming with Qt4 book also contains the code you ask for. Please read and follow "The Single Inheritance Approach" section from the docs.

Right. Than, I have a question concerning code that jpn gave me:

Code:

---

#include "ui_Maker.h"
 
 
 
      int main(int argc, char *argv[])
 
       {
 
           QApplication app(argc, argv);
 
           QMainWindow *window = new QMainWindow; // create a main window, that's what you have designed
 
           Ui::MainWindow ui;
 
           ui.setupUi(window);
 
           window->show();
 
           return app.exec();
 
      }

---

Why it's

Code:

---

Ui::MainWindow ui

---

? I didn't find anything what should be called by this.

Quote:

---

Originally Posted by Salazaar

Why it's

Code:

---

Ui::MainWindow ui

---

? I didn't find anything what should be called by this.

---

The name was picked from Marker.ui pasted in the very first post of yours. However, it was only an attempt to get you going. You really should forget about the direct approach and use better alternates.

Like The Single Inheritance Approach and The Multiple Inheritance Approach ... Ok, I'm working at it... and this MainWindow is the name of my main window which I gave to it by designer, right?

Quote:

---

Originally Posted by Salazaar

and this MainWindow is the name of my main window which I gave to it by designer, right?

---

That's right.

I use a tool to create cpp (source) && h (header file)


Finaly on main to show the gui you use on main...
## MainWindow is class name....
MainWindow::self()->setWindowTitle( _PROGRAM_TITLE_ );
MainWindow::self()->show();


download QTutils tool -> http://ppk.ciz.ch/qt_c++/QT_utils.zip
cd QT_utils
qmake
make

Open QTUtils insert the class name on top && select mainwindow/Dialog/Widged type same as ui file && generate the code as header & source ... or only as header....

Put the file on projekt dir && run && main.cpp
on cmd dir qmake -project
call the dialog on main...

but on top from pro file ...

MOC_DIR = build/.moc
RCC_DIR = build/.rcc
OBJECTS_DIR = build/.obj
UI_DIR = ui

and final
qmake && make.

But Direct Approach shows how to show the dialog, not to make changes in it. And to not to make a new thread, I'll ask here, can I create slots in designer? And in this code, which is here: http://doc.trolltech.com/4.2/designe...tance-approach
I have to paste into main.cpp file, right?
Edit:
Patrik, there's no problem with creating main file, but with connecting mainwindow to other applications and with creating slots

Quote:

---

Originally Posted by Salazaar

But Direct Approach shows how to show the dialog, not to make changes in it. And to not to make a new thread, I'll ask here, can I create slots in designer?

---

No, you can't create slots in Designer.

Quote:

---

And in this code, which is here: http://doc.trolltech.com/4.2/designe...tance-approach
I have to paste into main.cpp file, right?

---

Look at the Calculator Form Example. It uses the single inheritance approach and custom slots.

Quote:

---

Originally Posted by Salazaar

And to not to make a new thread, I'll ask here, can I create slots in designer?

---

http://www.qtcentre.org/forum/faq.ph...igner_category

Quote:

---

Originally Posted by jpn

No, you can't create slots in Designer.


Look at the Calculator Form Example.

---

But in http://doc.trolltech.com/4.2/designe...tance-approach it shows how to add a custom slot, but it doesn't show how to connect action to another dialog

Please connect all the knowledge gathered in this thread and use it together. If you have any doubt, consult the FAQ and the article you were given. If you still have problems, ask *specific* questions.

Hi. So, I've got a question. There appear errors:

In member function void MainWindow::cbazion()
expected primary-expression before ) token
expected ; before) token
expected } at end of input

And this is this file:

Code:

---

#include <QtGui>
 
 #include "maker.h"
 
 MainWindow::MainWindow(QMainWindow *parent)
     : QMainWindow(parent)
 {
     ui.setupUi(this);
 }
 
 void MainWindow::abcziom()
 {
 
 }
 
 void MainWindow::cbaziom()
 {
 
 )

---

Could you post the contents of maker.h file?

You have a right bracket instead of a right brace in the last line.

This is the full maker.h content:

Code:

---

#ifndef MAKER_H
 #define MAKER_H
 
 #include "ui_maker.h"
 
 class MainWindow : public QMainWindow
 {
     Q_OBJECT
 
 public:
     MainWindow(QMainWindow *parent = 0);
 
 private slots:
     void abcziom();
     void cbaziom();
 
 private:
     Ui::MainWindow ui;
 };
 
 #endif

---

So, what's wrong?

As I said, you have a wrong character in your implementation file.

Ok, it works properly. And how can I connect other dialog to one of actions defined in ui_maker.h?? Because I can't understand multiple inheritance

Quote:

---

Originally Posted by Salazaar

And how can I connect other dialog to one of actions defined in ui_maker.h??

---

For example you can use the automatic connections mechanism, by adding a specially named slot to your class:

Code:

---

void MainWindow::on_someAction_triggered()
{
   OtherDialog dlg( this );
   dlg.exec();
}

---

Where someAction is the name of the action you want to connect to and triggered() is the signal you want to react on.

Quote:

---

Originally Posted by Salazaar

Because I can't understand multiple inheritance

---

It looks like you have taken the single inheritance approach, so you don't use the multiple inheritance anywhere.

Ok, so I create slot:

Code:

---

void MainWindow::on_actionAbout_triggered()
 
      {
 
         OtherDialog dlg( this );
 
         dlg.exec();
 
      }

---

And, what's the next step?

Can't you just follow a tutorial or something? It'll be way faster if you do...

Quote:

---

Originally Posted by Salazaar

Because I can't understand multiple inheritance

---

So I'd like you to show me how to do it, please.Regarsds

Quote:

---

Originally Posted by Salazaar

And, what's the next step?

---

Compilation ;)

Qt will handle the rest, provided that you have that OtherDialog class. How does your main() function look like?

What does multiple inheritance have to do with the code you pasted above?

Here is a list of different examples and tutorials which you might want to take a look at:
http://doc.trolltech.com/4.2/examples.html

Here is an article stating step by step how to use forms created in Designer:
http://doc.trolltech.com/4.2/designe...component.html

Here is a link to The Independent Qt Tutorial by Johan Thelin which is a tutorial on Qt3 for beginners. If you have trouble handling Qt basics, it'll be fine for you even if you use Qt4:
http://www.digitalfanatics.org/projects/qt_tutorial/

The problem is that you're asking questions without telling us what you want. In particular I have no idea what "next step" you were referring to in your previous post. We don't know what you already did, what you're planning to do, etc.

Quote:

---

Originally Posted by jacek

Qt will handle the rest, provided that you have that OtherDialog class.

---

You're assuming he has a actionAbout action in his class :)

Quote:

---

Originally Posted by jacek

Compilation ;)

Qt will handle the rest, provided that you have that OtherDialog class

---

I don't understand. The only thing that I have to do is defining this? But what should be in OtherDialog and dlg places in my case, if I have a Main Window called MainWindow and all actions defined in ui_maker.h file? This file is designed by designer. And I have to include this ui_Dialog file, yes? Regards

Quote:

---

Originally Posted by jacek

Compilation ;)

Qt will handle the rest, provided that you have that OtherDialog class

---

I don't understand. The only thing that I have to do is defining this? But what should be in OtherDialog and dlg places in my case, if I have a Main Window called MainWindow and a dialog called Dialog? All actions aredefined in ui_maker.h file, this file is designed by designer. I have this two files: maker.h:

Code:

---

#ifndef MAKER_H
 #define MAKER_H
 
 #include "ui_maker.h"
 
 class MainWindow : public QMainWindow
 {
     Q_OBJECT
 
 public:
     MainWindow(QMainWindow *parent = 0);
 
 private slots:
     void abcziom();
     void cbaziom();
 
 private:
     Ui::MainWindow ui;
 };
 
 #endif

---

and ui_about:

Code:

---

#ifndef UI_ABOUT_H
#define UI_ABOUT_H
 
#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QDialog>
#include <QtGui/QLabel>
#include <QtGui/QPushButton>
 
class Ui_Dialog
{
public:
    QLabel *label;
    QLabel *label_2;
    QLabel *label_3;
    QPushButton *pushButton;
 
    void setupUi(QDialog *Dialog)
    {
    Dialog->setObjectName(QString::fromUtf8("Dialog"));
    label = new QLabel(Dialog);
    label->setObjectName(QString::fromUtf8("label"));
    label->setGeometry(QRect(15, 23, 361, 16));
    label->setLayoutDirection(Qt::LeftToRight);
    label->setTextFormat(Qt::AutoText);
    label_2 = new QLabel(Dialog);
    label_2->setObjectName(QString::fromUtf8("label_2"));
    label_2->setGeometry(QRect(15, 50, 351, 81));
    label_2->setLineWidth(1);
    label_2->setMidLineWidth(0);
    label_2->setTextFormat(Qt::RichText);
    label_2->setAlignment(Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop);
    label_2->setWordWrap(true);
    label_3 = new QLabel(Dialog);
    label_3->setObjectName(QString::fromUtf8("label_3"));
    label_3->setGeometry(QRect(25, 163, 171, 21));
    pushButton = new QPushButton(Dialog);
    pushButton->setObjectName(QString::fromUtf8("pushButton"));
    pushButton->setGeometry(QRect(260, 250, 75, 23));
    pushButton->setDefault(true);
    pushButton->setFlat(false);
 
    retranslateUi(Dialog);
 
    QSize size(400, 293);
    size = size.expandedTo(Dialog->minimumSizeHint());
    Dialog->resize(size);
 
    QObject::connect(pushButton, SIGNAL(clicked()), Dialog, SLOT(close()));
 
    QMetaObject::connectSlotsByName(Dialog);
    } // setupUi
 
    void retranslateUi(QDialog *Dialog)
    {
    Dialog->setWindowTitle(QApplication::translate("Dialog", "About", 0, QApplication::UnicodeUTF8));
    Dialog->setAccessibleName(QApplication::translate("Dialog", "About", 0, QApplication::UnicodeUTF8));
    label->setText(QApplication::translate("Dialog", "About TimeTable Maker", 0, QApplication::UnicodeUTF8));
    label_2->setText(QApplication::translate("Dialog", "...", 0, QApplication::UnicodeUTF8));
    label_3->setText(QApplication::translate("Dialog", "Thank you for using TimeTable Maker", 0, QApplication::UnicodeUTF8));
    pushButton->setText(QApplication::translate("Dialog", "OK", 0, QApplication::UnicodeUTF8));
    Q_UNUSED(Dialog);
    } // retranslateUi
 
};
 
namespace Ui {
    class Dialog: public Ui_Dialog {};
} // namespace Ui
 
#endif // UI_ABOUT_H

---