DtProjectedGridLinesDrawer.h

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/*****************************************************************************
 * Copyright (c) 2011 MAK Technologies, Inc.
 * All rights reserved.
 *****************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvOsg/DtGridLinesDrawer.h>

#include <vrvGraphics/DtFont.h>

#include <makArchives/DtGridLinesSettingsRecord.h>

#include <osg/Vec2>
#include <osg/Vec2d>

#include <boost/unordered_set.hpp>

namespace makVrv
{

   class DtDe;
   class DtOsgChannel;
   class DtOverlayRenderer;
   class DtLineSegment;
   class DtTextProxy;
   class DtBoundingBox;

   class DT_DLL_VRVOSG DtProjectedGridLinesDrawer : public DtGridLinesDrawer
   {
   public:

      DtProjectedGridLinesDrawer( DtDe& de );

      virtual ~DtProjectedGridLinesDrawer();

      virtual void drawGridLines();

      virtual void setMaxGridLines( int maxGridLines );

      virtual void setWindowDimensions( double startWindowX, double startWindowY,
         double endWindowX, double endWindowY );

      virtual void setCenter( const osg::Vec2d& center );

      virtual void setHeading( double heading );

      virtual void setScale( double scale );

      virtual void destroyGridLines();

   protected:
      virtual void reloadTextFonts();

      enum LabelPosition { Bottom, Left, Top, Right, Indeterminate };

      // \brief Draw the north/south grid lines and labels based on current geometry
      virtual void drawNorthSouthGridLinesAndLabels();

      // \brief Draw the east/west grid lines and labels based on current geometry
      virtual void drawEastWestGridLinesAndLabels();

      virtual void findSpacing();

      virtual void anchorAndOffsetLines();

      virtual DtUnicode createLabel( const double& xMeters, const double& yMeters, bool isNorthSouth );

      virtual bool labelGridBox( double nsValue, double ewValue, int labelIndex );

      void convertDegreeSpacingToMeters( double gridSpacing, double& xSpacing, double& ySpacing ) const;

      virtual DtFont::TextAlignement offsetLabel( double xSrc, double ySrc,
         double& xOffset, double& yOffset, DtBoundingBox& bbox ) const;

      virtual DtFont::TextAlignement offsetGridBoxLabel( double xSrc, double ySrc,
         double& xOffset, double& yOffset, DtBoundingBox& bbox ) const;

      virtual LabelPosition calcLabelPosition( double x, double y ) const;

      virtual void calcDesiredLabelPosition();

      double degreesLatitudeToMeters( double x, double y ) const;

      double convertToMetersOrDegrees( double value ) const;

      virtual double degreesLongitudeToMeters() const;

      virtual double fixedSpacingAmount() const;

      virtual double xOffset() const;

      virtual double yOffset() const;

      struct GridLine
      {
      public:
         DtLineSegment* line;
         DtTextProxy* label;
         double value;
         // If an east west label, the start and end x values; else
         // start and end y values;
         double start;
         double end;
      };

      typedef std::vector<GridLine> GridLineVector;

      // Array grid box labels
      typedef std::vector<DtTextProxy*> GridBoxLabelArray;

      virtual void clearUnusedLinesAndLabels( int index, GridLineVector& lines );

      virtual void clearUnusedGridBoxLabels( int index );

      virtual bool drawGridLineAndLabel( double startX, double startY,
         double endX, double endY, GridLine& gridLine, float* lineColor,
         LabelPosition labelPosition, float* labelColor, bool isNorthSouth );

   protected:

      virtual void labelGridBoxes();

      typedef std::vector<float> VertexList;

      static void rotate(const DtProjectedGridLinesDrawer::VertexList& in,
         double rad, DtProjectedGridLinesDrawer::VertexList& out );

      static void translate( const DtProjectedGridLinesDrawer::VertexList& in,
         const osg::Vec2& translation, DtProjectedGridLinesDrawer::VertexList& out );

      static void scale( const DtProjectedGridLinesDrawer::VertexList& in,
         double s, DtProjectedGridLinesDrawer::VertexList& out );

   private:

      DtProjectedGridLinesDrawer( const DtProjectedGridLinesDrawer& orig );

      DtProjectedGridLinesDrawer& operator=( const DtProjectedGridLinesDrawer& rhs );

   protected:
      typedef boost::unordered_set<DtUnicode> UsedGridLabels;

      GridLineVector myEastWestLines;
      GridLineVector myNorthSouthLines;
      GridBoxLabelArray myGridBoxLabels;

      UsedGridLabels myUsedGridLabels;

      double myHeading;
      osg::Vec2d myCenter;
      double myStartWindowX;
      double myStartWindowY;
      double myEndWindowX;
      double myEndWindowY;
      double myScale;

      double myAnchoredMinX;
      double myAnchoredMinY;
      double myAnchoredMaxX;
      double myAnchoredMaxY;
      double myXSpacing;
      double myYSpacing;
      LabelPosition myNorthSouthLabelPosition;
      LabelPosition myEastWestLabelPosition;

   };

}