AbstractGraphicsItem.h

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/*  Copyright (C) 2008 National Institute For Space Research (INPE) - Brazil.
 
    This file is part of the TerraLib - a Framework for building GIS enabled applications.
 
    TerraLib is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License,
    or (at your option) any later version.
 
    TerraLib is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with TerraLib. See COPYING. If not, write to
    TerraLib Team at <terralib-team@terralib.org>.
 */
 
 /*!
   \file terralib/process/qt/AbstractGraphicsItem.h
 
   \brief An Abstract graphicItem to represents a process Builder item.
 */
 
#ifndef __TERRALIB_PROCESS_QT_INTERNAL_ABSTRACTGRAPHICSITEM_H
#define __TERRALIB_PROCESS_QT_INTERNAL_ABSTRACTGRAPHICSITEM_H
 
#include "../../Config.h"
 
#include "HotPointGraphicsItem.h"
 
 // Qt Includes
#include <QBrush>
#include <QFont>
#include <QGraphicsObject>
#include <QPainterPath>
#include <QPen>
 
namespace te
{
  namespace process
  {
    namespace qt
    {
      /*!
      \class AbstractGraphicsItem
 
      \brief An Abstract graphicItem to represents a process Builder item.
 
      */
      class TEPROCESSEXPORT AbstractGraphicsItem : public QGraphicsObject
      {
      public:
 
        /*! \brief Default constructor. */
        AbstractGraphicsItem();
 
        /*! \brief Virtual destructor. */
        virtual ~AbstractGraphicsItem();
 
      protected:
 
        /*!
          \brief Virtual function used to notify when user clicks over a hotpoint.
 
          \param hotpoint Pointer to the hotpoint pressed.
        */
        virtual void hotPointPressed(HotPointGraphicsItem* hotpoint) = 0;
 
      protected:
 
        /*!
          \brief  Virtual function that defines the outer bounds of the item as a rectangle.
 
          \return QRectF for this item.
        */
        virtual QRectF boundingRect() const = 0;
 
        /*!
          \brief Function used to draw the process item.
 
          \param painter Qt Painter used to draw the process item.
 
          \param option Qt style options used to draw the process item.
        */
        virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr);
 
        /*!
          \brief Receive hover enter events for this item. The default implementation calls update().
 
          \param event Qt event.
        */
        void hoverEnterEvent(QGraphicsSceneHoverEvent *event) override;
 
        /*!
          \brief Receive hover move events for this item. The default implementation does nothing.
 
          \param event Qt event.
        */
        void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
 
        /*!
          \brief Receive hover leave events for this item. The default implementation calls update().
 
          \param event Qt event.
        */
        void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;
 
        /*!
          \brief Receive mouse press events for this item.
 
          \param event Qt event.
        */
        void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
 
        /*!
          \brief Receive mouse move events for this item.
 
          \param event Qt event.
        */
        void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
 
        /*!
          \brief Receive mouse release events for this item.
 
          \param event Qt event.
        */
        void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
 
      public:
 
        QPen getPen();
 
        QBrush getBrush();
 
        QFont getFont();
 
        void setPenColor(QColor color);
 
        void setPenWidth(int width);
 
        void setPenStyle(Qt::PenStyle style);
 
        void setBrushColor(QColor color);
 
        void setBrushStyle(Qt::BrushStyle style);
 
        void setFont(QFont font);
 
      protected:
 
        /*!
          \brief Function used to get hotpoint given a item position.
 
          \Return Pointer to the hotpoint if in this position has a hotpoint and nullptr in other case.
        */
        HotPointGraphicsItem* getHotPoint(const QPointF& pos);
 
      protected:
 
        QPainterPath m_path;                                        //!< Paintr path that represents this item.
 
        std::vector<HotPointGraphicsItem*> m_hotPoints;             //!< List of all hotpoints for this item.
 
        bool m_drawHotPoints;                                       //!< Flag used to indicate if the hot points has to be painted.
 
      protected:
 
        QPen    m_pen;
        QBrush  m_brush;
        QFont   m_font;
      };
    }
  }
}
 
#endif // __TERRALIB_PROCESS_QT_INTERNAL_PROCESSSQUAREGRAPHICSITEM_H