Development/Tutorials/KDE2/KHello/Tutorial 4

Description

Now we will make our users very happy by adding a menu!

Source code

/************* khello.h *******************/

```
// From KHello3
```
```
#include <kapp.h>
```
```
#include <kmainwindow.h>
```
```
#include <kmessagebox.h>
```
```
#include <qpushbutton.h>
```
```
// end From KHello3
```
```
#include <kmenubar.h>
```
```
#include <kpopupmenu.h>
```
```
 
```
```
// From KHello3
```
```
class KHello : public KMainWindow
```
```
{
```
```
  Q_OBJECT
```
```
public:
```
```
  KHello();
```
```
  void closeEvent(QCloseEvent *);
```
```
public slots:
```
```
  void slotHello();
```
```
  void slotExit();
```
```
private:
```
```
  QPushButton *btnHello;
```
```
  QPushButton *btnExit;
```
```
// end From KHello3
```
```
  KMenuBar *menu;
```
```
  KPopupMenu *file, *help;
```
```
};
```

/************* khello.cc ******************/

```
// From KHello3
```
```
#include "khello.moc"
```
```
#include <kmessagebox.h>
```
```
 
```
```
KHello::KHello() : KMainWindow()
```
```
{
```

  btnHello = new QPushButton("Hello", this);

```
  btnHello->setGeometry(45,30,50,25);
```
```
  btnHello->show();
```

  connect(btnHello, SIGNAL(clicked()), this, SLOT(slotHello()));

```
 
```

  btnExit = new QPushButton("Exit", this);

```
  btnExit->setGeometry(105,30,50,25);
```
```
  btnExit->show();
```

  connect(btnExit, SIGNAL(clicked()), this, SLOT(slotExit()));

```
// end From KHello3
```
```
  file = new KPopupMenu();
```

  file->insertItem("&Hello", this, SLOT(slotHello()));

  file->insertItem("&Exit", this, SLOT(slotExit()));

```
 
```

  help = helpMenu("KHello\nby Daniel Marjamäki\nUpdated by David Leimbach");

```
 
```
```
  menu = menuBar();
```
```
  menu->insertItem("&File", file);
```
```
  menu->insertItem("&Help", help);
```
```
}
```
```
// From KHello3
```
```
void KHello::closeEvent(QCloseEvent *e)
```
```
{
```
```
  kapp->beep();
```
```
  KMainWindow::closeEvent(e);
```
```
}
```
```
 
```
```
void KHello::slotHello()
```
```
{
```

  KMessageBox::information(this, "Hello World!", "Important");

```
}
```
```
 
```
```
void KHello::slotExit()
```
```
{
```
```
  close();
```
```
}
```
```
// end From KHello3
```

Important code

This code was simple and didn't need any explaining. However, I think one line was important, and will comment it.

help = helpMenu("KHello\nby Daniel Marjamäki\nUpdated by David Leimbach");

KMainWindow has a built in function which generates a help menu. Use it, in order to make your application consistent to other KDE programs.

Compiling

[on linux where KDEDIR and QTDIR contain the paths to where KDE and Qt are installed respectively] [FreeBSD 5.x users may omit the -ldl]

g++ -c -I$KDEDIR/include -I$QTDIR/include -fno-rtti main.cc
moc khello.h -o khello.moc
g++ -c -I$KDEDIR/include -I$QTDIR/include -fno-rtti khello.cc
g++ -L$KDEDIR/lib -L$QTDIR/lib -lkdeui -lkdecore -lqt -ldl -o khello main.o khello.o

Development/Tutorials/KDE2/KHello/Tutorial 4

Contents

Description

Source code

Important code

Compiling