DrawThread.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/qt/widgets/canvas/DrawThread.h
 
\brief Thread to draw a Layer in a PaintDevice.
*/
 
#ifndef __TERRALIB_QT_WIDGETS_INTERNAL_DRAWTHREAD_H
#define __TERRALIB_QT_WIDGETS_INTERNAL_DRAWTHREAD_H
 
//TerraLib
#include "../../../maptools/Enums.h"
#include "../Config.h"
 
// Qt
#include <QColor>
#include <QObject>
#include <QRunnable>
 
class QPaintDevice;
class QSize;
 
namespace te
{
  namespace gm
  {
    class Envelope;
  }
 
  namespace map
  {
    class AbstractLayer;
  }
 
  namespace qt
  {
    namespace widgets
    {
      class TEQTWIDGETSEXPORT DrawThread : public QObject, public QRunnable
      {
        Q_OBJECT
 
      public:
 
        DrawThread(QPaintDevice* dev, te::map::AbstractLayer* layer, te::gm::Envelope* env, const QColor& bckGround, int srid, double scale, 
                   te::map::AlignType hAlign, te::map::AlignType vAlign);
 
        ~DrawThread();
 
        void run();
 
        bool hasFinished() const;
 
        QString errorMessage() const;
 
        QString layerId() const;
 
       Q_SIGNALS:
 
        void finished();
 
      protected:
 
        QPaintDevice* m_device;
        
        te::map::AbstractLayer* m_layer;
 
        te::gm::Envelope* m_envelope;
 
        QColor m_bckGround;
 
        int m_srid;
 
        double m_scale;
 
        te::map::AlignType m_hAlign;                        //!< The display horizontal align.
 
        te::map::AlignType m_vAlign;                        //!< The display vertical align.
 
      public: 
 
        bool m_cancel;
 
      protected:
 
        bool m_finished;
 
        QString m_errorMessage;
      };
    }
  }
}
 
#endif //__TERRALIB_QT_WIDGETS_INTERNAL_DRAWTHREAD_H