Qt 5.9 | Qt Widgets | Plug & Paint Example | interfaces.h Example File

Qt 5.9.9 Reference Documentation

# interfaces.h Example File

tools/plugandpaint/app/interfaces.h

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      #ifndef INTERFACES_H
      #define INTERFACES_H

      #include <QtPlugin>

      class QImage;
      class QPainter;
      class QWidget;
      class QPainterPath;
      class QPoint;
      class QRect;
      class QString;
      class QStringList;

      class BrushInterface
      {
      public:
          virtual ~BrushInterface() {}

          virtual QStringList brushes() const = 0;
          virtual QRect mousePress(const QString &brush, QPainter &painter,
                                   const QPoint &pos) = 0;
          virtual QRect mouseMove(const QString &brush, QPainter &painter,
                                  const QPoint &oldPos, const QPoint &newPos) = 0;
          virtual QRect mouseRelease(const QString &brush, QPainter &painter,
                                     const QPoint &pos) = 0;
      };

      class ShapeInterface
      {
      public:
          virtual ~ShapeInterface() {}

          virtual QStringList shapes() const = 0;
          virtual QPainterPath generateShape(const QString &shape,
                                             QWidget *parent) = 0;
      };

      class FilterInterface
      {
      public:
          virtual ~FilterInterface() {}

          virtual QStringList filters() const = 0;
          virtual QImage filterImage(const QString &filter, const QImage &image,
                                     QWidget *parent) = 0;
      };

      #define BrushInterface_iid "org.qt-project.Qt.Examples.PlugAndPaint.BrushInterface/1.0"

      Q_DECLARE_INTERFACE(BrushInterface, BrushInterface_iid)

      #define ShapeInterface_iid  "org.qt-project.Qt.Examples.PlugAndPaint.ShapeInterface/1.0"

      Q_DECLARE_INTERFACE(ShapeInterface, ShapeInterface_iid)
      #define FilterInterface_iid "org.qt-project.Qt.Examples.PlugAndPaint.FilterInterface/1.0"

      Q_DECLARE_INTERFACE(FilterInterface, FilterInterface_iid)

      #endif