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