Qt Toolkit - biff/main.cpp example file

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# Biff (UNIX only)

Biff is a simple graphical program to indicate whether there is new mail; it looks exactly like xbiff but is much shorter.

Header file:

    /****************************************************************************
    ** $Id: qt/examples/biff/biff.h   2.3.7   edited 2001-01-26 $
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #ifndef BIFF_H
    #define BIFF_H

    #include <qwidget.h>
    #include <qdatetime.h>
    #include <qpixmap.h>

    class Biff : public QWidget
    {
        Q_OBJECT
    public:
        Biff( QWidget *parent=0, const char *name=0 );

    protected:
        void        timerEvent( QTimerEvent * );
        void        paintEvent( QPaintEvent * );
        void        mousePressEvent( QMouseEvent * );

    private:
        QDateTime   lastModified;
        QPixmap     hasNewMail;
        QPixmap     noNewMail;
        QString     mailbox;
        bool        gotMail;
    };

    #endif // BIFF_H

biff.cpp implements this custom widget. Note in particular how two images (hasmail_bmp_data and nomail_bmp_data, both from bmp.cpp) are included into the executable.

    /****************************************************************************
    ** $Id: qt/examples/biff/biff.cpp   2.3.7   edited 2001-01-26 $
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include "biff.h"
    #include <qstring.h>
    #include <qfileinfo.h>
    #include <qpainter.h>

    #include <unistd.h>
    #include <stdlib.h>

    #include "bmp.cpp"

    Biff::Biff( QWidget *parent, const char *name )
        : QWidget( parent, name, WType_Modal )
    {
        QFileInfo fi = QString(getenv( "MAIL" ));
        if ( !fi.exists() ) {
            QString s( "/var/spool/mail/" );
            s += getlogin();
            fi.setFile( s );
        }

        if ( fi.exists() ) {
            mailbox = fi.absFilePath();
            startTimer( 1000 );
        }

        setMinimumSize( 48, 48 );
        setMaximumSize( 48, 48 );
        resize( 48, 48 );

        hasNewMail.loadFromData( hasmail_bmp_data, hasmail_bmp_len );
        noNewMail.loadFromData( nomail_bmp_data, nomail_bmp_len );

        gotMail = FALSE;
        lastModified = fi.lastModified();
    }

    void Biff::timerEvent( QTimerEvent * )
    {
        QFileInfo fi( mailbox );
        bool newState = ( fi.lastModified() != lastModified &&
                          fi.lastModified() > fi.lastRead() );
        if ( newState != gotMail ) {
            if ( gotMail )
                lastModified = fi.lastModified();
            gotMail = newState;
            repaint( FALSE );
        }
    }

    void Biff::paintEvent( QPaintEvent * )
    {
        if ( gotMail )
            bitBlt( this, 0, 0, &hasNewMail );
        else
            bitBlt( this, 0, 0, &noNewMail );
    }

    void Biff::mousePressEvent( QMouseEvent * )
    {
        QFileInfo fi( mailbox );
        lastModified = fi.lastModified();
    }

Main:

    /****************************************************************************
    ** $Id: qt/examples/biff/main.cpp   2.3.7   edited 2001-01-26 $
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <qapplication.h>
    #include "biff.h"

    int main( int argc, char ** argv )
    {
        QApplication a( argc, argv );
        Biff b;
        a.setMainWidget( &b );
        b.show();
        return a.exec();
    }