correctly installed Qt4

[Salazaar]

Hi, I've got a huge request. Can somebody upload for me Dev-C++ with correctly installed Qt 4? I would be very very thankful.

[high_flyer]

What do you mean with Qt4 correctly installed?
Dev-C++ is just an IDE.
It has no connection with Qt4.
You can develop Qt4 apps with Dev-C++, but no one can "upload" it, since these are two seperate things.

[marcel]

Perhaps you need guidance on how to set it up in order to use it with Qt?

[Osoascam]

My first post!!! Yay!!!

Hi!!
I'm new (completely new) at C++. I'm trying to use QT for a homework. I can ONLY use QT or GTK, and I think QT is a lot simpler. I got only two weeks for this project, so there's no time I can waste.

The thing is... How do I install QT?

I followed all of the steps in this page: http://darkhack.googlepages.com/qttutorial

It didn't work. At all, so I entered this page: http://nicolasj.developpez.com/articles/qt4/
This site is in french... Yeap, I had a hard time

There, it explained some things a bit (the "qmake" directory was wrong, so I got a hard time finding it). Qmake is supposed to create a Makefile.Release, and then you use some variables of it to make a Template.

The thing is, after all this trouble (that costed me one whole day of nothingness), I still caaaaan't!!!! :'(

There's an error that says (using Dev-c++, by the way)
[Build Error] [main.o] Error 1

WHat can I do?

If somebody has an easy way of using QT, please help me, I'm starting to feel a bit desperate...

Thanks!!!

If I have to restar from zero, it doesn't matter. But I have only two weeks for learning C++, B-Trees and Qt... And time is gold... Could you please help me?

(And that way, you can also help Salazaar)

[Salazaar]

Yeah, I also have done everything what is described in http://darkhack.googlepages.com/qttutorial but it doesn't work, i tried many installation tips, but is still doesn't work!! I'd like to make applications in Qt, but i can't install that. So could somebody tell me, where's 100% correct installing tutorial? Thanks

[marcel]

You must first compile Qt in order to use it with Dev-C++.
The open source version is just that: open source . No binaries. They have to be compiled.

What compilers are you using? Mingw or the Microsoft C++ compiler (Visual C++ )?

This influences the building process...

Regards

[Salazaar]

I'm using Dev-C++ (which is using MinGW). And I'd really like to desing qt applications, but I can't install it! All of the tutorial tries are failed... Do you now any 100% checked way to install Qt4? I have Qt4 opensource installer on my desktop, Thanks

[Osoascam]

Hahahaha!! Yeah!! All tutorials have failed (or maybe WE have failed). As I said before, I also used the french page (which I translated to English with Google). Well, Salazaar, at least we're not alone. There's a whole crew of classmates of mine which have the same problem.

Some have already given up and started using GTK (which, to me, seems a lot more complicated to use). As soon as somebody has an answer, I will post it.

By the way, I know nothing of C++, so that main.o thing mekase me go "WTF????"

[Osoascam]

By the way... I used that qmake thing... I suppose that compiles, doesn't it? This demonstrates my level of "lostiness"...

[vermarajeev]

By the way... I used that qmake thing... I suppose that compiles, doesn't it? This demonstrates my level of "lostiness"...

Did you try this linkhttp://www.imb-jena.de/~hollund/software.html
See the section Qt4 with Dev-C++
I'm using Kdevelop on linux system and there is no problem.

[Brandybuck]

I don't understand what all this confusion is about. For Windows, I download Qt open source, and run the installer program. When it asks me if I want MinGW, I say yes. But if you already have MinGW with Dev-C++, then say no, and give it the right location. Soon Qt is installed and working. Very easy.

If you are having troubles, then you need to say more than just "it doesn't work." Tell us WHAT doesn't work. Tell us the error messages. Tell us exactly what you are doing.

[Salazaar]

Ok, so I have:
1) Downloaded Qt 4.2.3 Open Source installer
2) Installed it to my Dev-C++ directory
3) Added this template to my Dev-Cpp/Temaplates
4) Added C:/Qt/4.2.3/lib library and C:/Qt/4.2.3/bin binary file to Dev-C++ by tools->compilator options->directories
The warnings are such as:

1 C:\Dev-Cpp\main.cpp QApplication: No such file or directory. 
2 C:\Dev-Cpp\main.cpp QPushButton: No such file or directory. 
6 C:\Dev-Cpp\main.cpp `QApplication' undeclared (first use this function)
6 C:\Dev-Cpp\main.cpp expected `;' before "app"

1 C:\Dev-Cpp\main.cpp QApplication: No such file or directory. 
2 C:\Dev-Cpp\main.cpp QPushButton: No such file or directory. 
6 C:\Dev-Cpp\main.cpp `QApplication' undeclared (first use this function)
6 C:\Dev-Cpp\main.cpp expected `;' before "app"

To copy to clipboard, switch view to plain text mode 

And more. Code, which I have used:
#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();
}

[marcel]

What about the include paths? Have you set them correctly?

They should be ( or contain ) C:/Qt/4.2.3/include

Regards

[Salazaar]

They're in c:/Qt/4.2.3/include but how could I set them to Dev?

[marcel]

Create a new project and look in the project options.

I never used it, but any decent IDE should have an option for additional include paths.

Regards

[Salazaar]

I have added this to Project options->directiories but it still doesn't work. The same errors. What I am doing wrong?

[marcel]

Try adding the to Tools/Compiler options/Directories/C++ includes also.

Maybe it works this way.
Somehow it's gotta work...

[Salazaar]

No, It still doesn't work. (To one of users: Now you see, what is this confusion about). So what do I have to do to set all of this .... correctly? Regards

[marcel]

I used your template and I made it work. But this is an unacceptable solution. You have to add all the directory paths inside c:\qt\include in the project options.

Regards

[Salazaar]

It means that I have to add every file which is in include directory manually? Do I have to do the same with bin and lib directories?