basictoolsplugin.h Example File
tools/plugandpaintplugins/basictools/basictoolsplugin.h

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 #ifndef BASICTOOLSPLUGIN_H
 #define BASICTOOLSPLUGIN_H

 #include <QRect>
 #include <QObject>
 #include <QStringList>
 #include <QPainterPath>
 #include <QImage>

 #include <plugandpaint/interfaces.h>

 class BasicToolsPlugin : public QObject,
                          public BrushInterface,
                          public ShapeInterface,
                          public FilterInterface
 {
     Q_OBJECT
     Q_INTERFACES(BrushInterface ShapeInterface FilterInterface)

 public:
     // BrushInterface
     QStringList brushes() const;
     QRect mousePress(const QString &brush, QPainter &painter,
                      const QPoint &pos);
     QRect mouseMove(const QString &brush, QPainter &painter,
                     const QPoint &oldPos, const QPoint &newPos);
     QRect mouseRelease(const QString &brush, QPainter &painter,
                        const QPoint &pos);

     // ShapeInterface
     QStringList shapes() const;
     QPainterPath generateShape(const QString &shape, QWidget *parent);

     // FilterInterface
     QStringList filters() const;
     QImage filterImage(const QString &filter, const QImage &image,
                        QWidget *parent);
 };

 #endif