Code for the header file

Given the constaints, we will now see what the header file theme2k.h looks like this:

Example 5.1. Listing for theme2k.h

#ifndef __THEME2K_H__
#define __THEME2K_H__

#include <qlabel.h>
#include <qwidget.h>

#include <kdialogbase.h>
#include <kpixmap.h>
#include <ksplash/themeengine.h>

class RotWidget;

class Cfg2k: public ThemeEngineConfig
{
  Q_OBJECT
public:
  Cfg2k( KConfig * );
};

class ObjKsTheme;
class Theme2k: public ThemeEngine
{
  Q_OBJECT
public:
  Theme2k( QWidget *, const char *, const QStringList& );

  inline const QString name()
  {
    return( QString("KSplash2k") );
  }
  inline const KDialogBase *config( KConfig *kc )
  {
    return new Cfg2k( kc );
  }
  static QStringList names()
  {
    QStringList Names;
    Names << "KSplash2k";
    Names << "ks2k";
    Names << "2k";
    Names << "2000";
    return( Names );
  };

public slots:
  inline void slotSetText( const QString& s )
  {
    if( mText && mText->text() != s ) mText->setText( s );
  };

private:
  void initUi();
  void readSettings();

  QLabel *mText;
  RotWidget *mRotator;
  QColor mTBgColor, mTFgColor, mRotColor1, mRotColor2, mStatusColor;
  int mRotSpeed;
  QString mWndTitle, mLogoFile;
};

#endif

Let us analyze the listing above. The Theme2k class satisfies the naming conventions, and is inherited from ThemeEngine. It provides a Theme2k::names(), and has a constructor that takes the required parameters: Theme2k( QWidget *, const char *, const QStringList& ); and also provides a simple Theme2k::slotSetText() method. For the moment, do not worry about the RotWidget class. It is a small widget that provides some eye candy for the user. Our plugin is very simple and does not display any icons or show a progressbar. If you would like to display icons, override the slotSetPixmap function. Similar functions exist for setting the progressbar range (slotUpdateSteps) and incrementing(slotUpdateProgress) the current step.