qt5base-lts/examples/widgets/tools/plugandpaintplugins/basictools/basictoolsplugin.h

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#ifndef BASICTOOLSPLUGIN_H
#define BASICTOOLSPLUGIN_H

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

//! [0]
#include <plugandpaint/interfaces.h>

//! [1]
class BasicToolsPlugin : public QObject,
                         public BrushInterface,
                         public ShapeInterface,
                         public FilterInterface
{
    Q_OBJECT
//! [4]
    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.Examples.PlugAndPaint.BrushInterface" FILE "basictools.json")
//! [4]
    Q_INTERFACES(BrushInterface ShapeInterface FilterInterface)
//! [0]

//! [2]
public:
//! [1]
    // 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);
//! [3]
};
//! [2] //! [3]

#endif