Learning Qt4 - Printable Version

Learning Qt4 - Printable Version

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Learning Qt4 - Leaky - Jun 22 2011

Is anyone interested in me doing a serious tutorial on how to create a functional application in Qt4 from the ground up? Vote on the poll, if there's enough interest then I'll document my current project as I work on it. Current project that I'm working on is a fairly simple Omegle (omegle.com) chat client. The tutorial would obviously demonstrate UI development, signals, slots, and networking using Qt, code in c++.

---

Qt4 is a widget based framework from nokia, mostly to do with GUI's but they have other APIs too for networking and stuff like that.

Here's a simple Hello World app:

main.cpp

Code:
#include <QApplication>

#include "include/MainWindow.h"

int main(int argc, char* argv[])

{

    QApplication app(argc, argv);

    MainWindow mainWin;

    mainWin.show();

    return app.exec();

}

include/MainWindow.h:

Code:
#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QLabel>

class MainWindow : public QMainWindow

{

    public:

        MainWindow();

    protected:

        void closeEvent(QCloseEvent *event);

    private slots:

    private:

        QLabel *container;

};

#endif // MAINWINDOW_H

src/MainWindow.cpp:

Code:
#include "../include/MainWindow.h"

MainWindow::MainWindow()

{

    container = new QLabel(this);

    container->setText("Hello World!");

    setCentralWidget(container);

}

void MainWindow::closeEvent(QCloseEvent *event)

{

}

RE: Learning Qt4 - MindHACKer - Oct 15 2011

I hate "Helloworld"s

RE: Learning Qt4 - Leaky - Oct 18 2011

MindHACKer Wrote:I hate "Helloworld"s

thanks for that lovely contribution!

RE: Learning Qt4 - rAnSaCk - Oct 18 2011

Isn't this C language?

RE: Learning Qt4 - Leaky - Oct 18 2011

my particular example is written in c++.

Qt does have c and c++ libraries though.

RE: Learning Qt4 - naive - Oct 18 2011

I almost started using Qt4 from ruby native c extension yesterday, but didn't feel like installing a sane build enviroment for windows where I was gonna use the code. I ended up just settling on java swing (jruby). I'm writing a little google voice desktop sms client.

RE: Learning Qt4 - MindHACKer - Oct 25 2011

Leaky Wrote:
MindHACKer Wrote:I hate "Helloworld"s

thanks for that lovely contribution!

;D
It's just that they all post "Hello Worlds", why not post more advanced samples!

RE: Learning Qt4 - Leaky - Oct 25 2011

MindHACKer Wrote:
Leaky Wrote:
MindHACKer Wrote:I hate "Helloworld"s

thanks for that lovely contribution!

;D
It's just that they all post "Hello Worlds", why not post more advanced samples!

it's an introduction to UI development with Qt, it doesn't just print hello world, it builds a Qt window