GUI.h

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// GUI.h: interface for the GUI class.
//

#ifndef GUI_H
#define GUI_H

#include "Vector2.h"
#include "Color.h"

/* Provides an interface for the interaction of the simulator with a GUI. Can be specialized
for use under wxWidgets, MFC, etc. It is used for graphically illustrating the state of the
simulator on a display. **/
class GUI  {
public:
   GUI(float iniPanX=0, float iniPanY=400, float zoom=100.0f, int signX = 1, int signY = -1);
   virtual ~GUI();

   static const Color colorTransparent;
   static const Color colorWhite;
   static const Color colorBlack;

   void setZoom(float newZoom);

   virtual void clear() = 0;

   virtual void drawCircle(float x, float y, float r) = 0;
   void drawCircle(const Vector2& r, float R) { drawCircle((float)r.x, (float)r.y, R); }

   virtual void drawLine(float x1, float y1, float x2, float y2) = 0;
   void drawLine(const Vector2& r1, const Vector2& r2){
      drawLine((float)r1.x,(float)r1.y,(float)r2.x,(float)r2.y);
   }
   void drawLine(const Vector2& r1, float x2, float y2){
      drawLine((float)r1.x,(float)r1.y,x2,y2);
   }

   virtual void drawRectangle(float x, float y, float w, float h) = 0;
   
   virtual void drawCappedRectangle(float x, float y, float l, float R, float alpha) = 0;
   virtual void setBrushColor(Color color) = 0;
   virtual void setPenColor(Color color) = 0;
   virtual void drawArrow(float x1, float x2, float y1, float y2) = 0;

   virtual void outText(const char* s) = 0;

   virtual void outTextStatusBar(const char* s, int pos) = 0;

   virtual void drawForce(const Vector2& r, const Vector2& force) = 0;

   virtual void drawTorque(const Vector2& r, const real alpha, const real torque) = 0;
   
   float mapX(float x) {
      //return panX + floor(zoomX * x+0.5);
      return panX + zoomX * x;
   }

   float mapY(float y) {
      //return panY + floor(zoomY * y+0.5);
      return panY + zoomY * y;
   }

   float inverseMapX(float x){
      return (float)(x-panX)/zoomX;
   }

   float inverseMapY(float y){
      return (float)(y-panY)/zoomY;
   }

   float mapLen(float len) {
      //mapLen is usually used for circle's ray, so it counts twice :)
      return zoom * len;
   }

   float panX;
   float panY;
   float zoom;
   int signX;
   int signY;
   float zoomX;
   float zoomY;
};


#endif //GUI_H

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