canvas.hh

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#include "stage.hh"
#include "option.hh"

#include <map>
#include <stack>

namespace Stg
{
  class Canvas : public Fl_Gl_Window
  {
     friend class WorldGui; // allow access to private members
     friend class Model;
  
  private:

     class GlColorStack
     {
     public:
        GlColorStack() : colorstack() {}
        ~GlColorStack() {}
        
        void Push( double r, double g, double b, double a=1.0 )
        {
          Push( Color(r,g,b,a) );
        }
        
        void Push( Color col )
        {
          colorstack.push( col );       
          glColor4f( col.r, col.g, col.b, col.a );
        }
        
        void Pop()
        {
          if( colorstack.size() < 1 )
             PRINT_WARN1( "Attempted to ColorStack.Pop() but ColorStack %p is empty",
                              this );
          else
             {
                Color& old = colorstack.top();
                colorstack.pop();
                glColor4f( old.r,  old.g,  old.b,  old.a ); 
             }
        }
        
        unsigned int Length()
        { return colorstack.size(); }
        
     private:
        std::stack<Color> colorstack;
     } colorstack;
     
     std::list<Model*> models_sorted;
  
     Camera* current_camera;
     OrthoCamera camera;
     PerspectiveCamera perspective_camera;
     bool dirty_buffer;
     Worldfile* wf;

     int startx, starty;
     bool selectedModel;
     bool clicked_empty_space;
     int empty_space_startx, empty_space_starty;
     std::list<Model*> selected_models;
     Model* last_selection; 


     msec_t interval; // window refresh interval in ms

     void RecordRay( double x1, double y1, double x2, double y2 );
     void DrawRays();
     void ClearRays();
     void DrawGlobalGrid();
  
     void AddModel( Model* mod );
     void RemoveModel( Model* mod );

     Option //showBlinken, 
        showBBoxes,
        showBlocks, 
        showBlur,
        showClock, 
        showData, 
        showFlags,
        showFollow,
        showFootprints, 
        showGrid, 
        showOccupancy, 
        showScreenshots,
        showStatus,
        showTrailArrows, 
        showTrailRise, 
        showTrails, 
        showVoxels,
        pCamOn,
        visualizeAll;
  
  public:
     Canvas( WorldGui* world, int x, int y, int width, int height);
     ~Canvas();
  
     bool graphics;
     WorldGui* world;
     unsigned long frames_rendered_count;
     int screenshot_frame_skip;
  
     std::map< std::string, Option* > _custom_options;

     void Screenshot();
     void InitGl();
     void InitTextures();
     void createMenuItems( Fl_Menu_Bar* menu, std::string path );
  
     void FixViewport(int W,int H);
     void DrawFloor(); //simpler floor compared to grid
     void DrawBlocks();
     void DrawBoundingBoxes();
     void resetCamera();
     virtual void renderFrame();
     virtual void draw();
     virtual int handle( int event );
     void resize(int X,int Y,int W,int H);

     void CanvasToWorld( int px, int py, 
                                double *wx, double *wy, double* wz );

     Model* getModel( int x, int y );
     bool selected( Model* mod );
     void select( Model* mod );
     void unSelect( Model* mod );
     void unSelectAll();

     inline void setDirtyBuffer( void ) { dirty_buffer = true; }
     inline bool dirtyBuffer( void ) const { return dirty_buffer; }
    
     void PushColor( Color col )
     { colorstack.Push( col ); } 

     void PushColor( double r, double g, double b, double a )
     { colorstack.Push( r,g,b,a ); }

     void PopColor(){ colorstack.Pop(); } 
  
     void InvertView( uint32_t invertflags );

     bool VisualizeAll(){ return ! visualizeAll; }
  
     static void TimerCallback( Canvas* canvas );
     static void perspectiveCb( Fl_Widget* w, void* p );
  
     void EnterScreenCS();
     void LeaveScreenCS();

     void Load( Worldfile* wf, int section );
     void Save( Worldfile* wf, int section );
     
     bool IsTopView(){ return( (fabs( camera.yaw() ) < 0.1) && 
                                        (fabs( camera.pitch() ) < 0.1) ); } 
  };

} // namespace Stg