RasterSlicingWizardPage.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>.
*/


#ifndef TE_QT_WIDGETS_RASTERSLICINGWIZARDPAGE_H
#define TE_QT_WIDGETS_RASTERSLICINGWIZARDPAGE_H

//Terralib
#include "../../../dataaccess/datasource/DataSourceInfo.h"
#include "../../../maptools/AbstractLayer.h"
#include "../Config.h"

//Qt
#include <QWizardPage>

//STL
#include <memory>

//Forward declarations
namespace Ui
{
  class RasterSlicingWizardPageForm;
}

namespace te
{
  namespace se
  {
    class ColorMap;
  }

  namespace qt
  {
    namespace widgets
    {
      class ChartStyle;
      class ChartDisplay;
      class SlicingColorMapWidget;
      class Histogram;
      class HistogramChart;

      class TEQTWIDGETSEXPORT RasterSlicingWizardPage : public QWizardPage
      {
        Q_OBJECT

      public:

        /*! \brief Constructor. */
        RasterSlicingWizardPage(QWidget* parent = 0);

        /*! \brief Destructor. */
        ~RasterSlicingWizardPage();

        /*!
        \brief This function returns the Color Map generated by the user.

        \return A color map representing the legend created by the user.

        /note The caller will take ownership of the returned pointer
        */
        te::se::ColorMap* getColorMap();

        /*!
        \brief This function returns the band from the raster taht will be used.

        \return A string that represents the band that will be used to slice the raster.
        */
        std::string getCurrentBand();

        /*!
        \brief This function returns the envelope that can be used to trim the raster if the user requests it.

        \return A reference to the Envelope that can be used to trim the raster if the user requests it.
        */
        const te::gm::Envelope& getExtent();

        /*!
        \brief This function returns the srid of the display when the wizard was initiated.

        \return The srid of the display when the wizard was initiated.
        */
        int getSRID();

        /*!
        \brief This function will check if the conditions required to trim the raster have been met.

        In order for this function to return true:

        The user must select the option to use the visible area;
        The extent must be valid;
        The extent must be within the raster;

        \return A boolean that indicates if the raster can be trimmed.
        */
        bool trimRaster();

        /*!
        \brief This function sets the layer that contains the raster that will be sliced.

        \param layer The layer from which the raster will be obtained.
        */
        void setLayer(te::map::AbstractLayerPtr layer);

        /*!
        \brief This function sets the envelope that will be used to trim tha raster if the user requests it.

        \param extent A reference to the envelope that can be used to trim tha raster.
        */
        void setExtent(const te::gm::Envelope& extent);

        /*!
        \brief This function sets the srid of the display when the wizard was initiated.

        \param srid The current srid of the display.
        */
        void setSRID(int srid = 0);

        /*!
        \brief This function returns the parameters as configured by the user.

        \param inputRasterBand The band from the raster selected by the user.
        \param  slicesNumber The number of slices that will be used to generate the histogram.
        \param  eqHistogram A boolean that holds weather the histogram will be equalized or not.
        */
        void getParameters(unsigned int& inputRasterBand,
          unsigned int& slicesNumber, bool& eqHistogram);

        /*!
        \brief This function evaluates the page to confirm if the user has completed the minimum configuration required to slice the raster.

        In order for this function to return true:

        The color map taht will be used on the output layer can not be empty.

        \param A boolean that indicates if the page is complete.
        */
        bool isComplete() const;

      protected:

        std::auto_ptr<Ui::RasterSlicingWizardPageForm>  m_ui;              //!< The wizard page form
        te::qt::widgets::ChartDisplay*                  m_chartDisplay;    //!< The display used to draw the preview histogram
        te::qt::widgets::SlicingColorMapWidget*         m_colorMapWidget;  //!< The widget used to edit the legend of the output layer
        te::qt::widgets::HistogramChart*                m_histogramChart;  //!< The preview histogram chart
        std::auto_ptr<te::rst::Raster>                  m_raster;          //!< The raster that will be sliced
        te::map::AbstractLayerPtr                       m_rasterLayer;        //!< Testing a better way to show the chart

        protected slots:

        void updateHistogram();
        void onSliceBandComboBoxIndexCHanged(int index);

      private:

        //No copy allowed
        RasterSlicingWizardPage(const RasterSlicingWizardPage& rhs);
        RasterSlicingWizardPage& operator=(const RasterSlicingWizardPage& rhs);

        te::gm::Envelope m_extent;  //!< The envelope that can be used to trim the output raster
        int m_srid;                 //!<  The current srid from the display
      };
    } // namespace widgets
  } // namespace qt
} // namespace te

#endif // TE_QT_WIDGETS_RASTERSLICINGWIZARDPAGE_H