#include "keyboard.h"
#include "clear_selection.h"
#include "selection_from_db.h"
#include "exp004reshape.h"
#include "../view/exp004state0.h"
#include <GL/glut.h>

#define S exp004state0

void
keyboard (unsigned char key, int x, int y)
{
  switch (key)
    {
    case 27:
      /*
       * ESC Pressed.
       */
      clear_selection ();
      glutPostRedisplay ();
      break;

    case 'g':
      /*
       * g has been pressed.  This is used to load a selection from
       * the database since it is the convention to use g for
       * refreshing a buffer in Emacs.
       */
      selection_from_db ();
      glutPostRedisplay ();
      break;

    case 'l':
      /* 
       * Toggle display of the legend.
       */
      S.legend = !S.legend;
      glutPostRedisplay ();
      break;

    case 'r':
      /*
       * Reset the view (unzoom).
       */
      S.zoom.active = false;
      exp004reshape (S.viewport.w, S.viewport.h);
      glutPostRedisplay ();
      break;

    case 's':
      /*
       * Selection will be used to define a set.
       */
      S.selection.purpose = SET;
      break;

    case 'z':
      /*
       * Selection will be use to zoom.
       */
      S.selection.purpose = ZOOM;
      break;
    }

  return;
}