9 files changed, 59 insertions, 30 deletions

diff --git a/src/controller/clear_selection.sqc b/src/controller/clear_selection.sqc
index 01a5364..ec98b4c 100644
--- a/src/controller/clear_selection.sqc
+++ b/src/controller/clear_selection.sqc
@@ -1,8 +1,6 @@
-/* I seem to need this for glGenBuffers as per
-   http://www.gamedev.net/community/forums/topic.asp?topic_id=422358 */
 #define GL_GLEXT_PROTOTYPES
-
 #include "clear_selection.h"
+#include "../model/map_geometry.h"
 #include "../view/exp004state0.h"
 #include <GL/glut.h>
 #include "sqlca.h"
@@ -40,6 +38,11 @@ clear_selection (void)
                 sizeof (S.base_colors_data), S.base_colors_data,
                 GL_STATIC_DRAW);
 
+  /*
+   * Rebuild the display list for the map.
+   */
+  map_geometry ();
+
   glutPostRedisplay ();
 
   return;
diff --git a/src/controller/exp004processhits.c b/src/controller/exp004processhits.c
index 264bd46..418f23a 100644
--- a/src/controller/exp004processhits.c
+++ b/src/controller/exp004processhits.c
@@ -1,5 +1,6 @@
 #define GL_GLEXT_PROTOTYPES
 #include "../view/exp004state0.h"
+#include "../model/map_geometry.h"
 #include "exp004processhits.h"
 #include "selsave.h"
 #include <stdio.h>
@@ -42,5 +43,10 @@ exp004processhits (GLint hits, GLuint buffer[])
                 sizeof (S.base_colors_data), S.base_colors_data,
                 GL_STATIC_DRAW);
 
+  /*
+   * Rebuild the display list for the map.
+   */
+  map_geometry ();
+
   return;
 }
diff --git a/src/controller/keyboard.c b/src/controller/keyboard.c
index d817d7c..99a20d0 100644
--- a/src/controller/keyboard.c
+++ b/src/controller/keyboard.c
@@ -17,6 +17,7 @@ keyboard (unsigned char key, int x, int y)
        * ESC Pressed.
        */
       clear_selection ();
+      glutPostRedisplay ();
       break;
 
     case 'g':
@@ -26,6 +27,15 @@ keyboard (unsigned char key, int x, int y)
        * 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':
diff --git a/src/controller/selection_from_db.sqc b/src/controller/selection_from_db.sqc
index 8c12c79..ccefa4a 100644
--- a/src/controller/selection_from_db.sqc
+++ b/src/controller/selection_from_db.sqc
@@ -1,5 +1,6 @@
 #define GL_GLEXT_PROTOTYPES
 #include "selection_from_db.h"
+#include "../model/map_geometry.h"
 #include "../view/exp004state0.h"
 #include "../util/check_error.h"
 #include <GL/glut.h>
@@ -62,6 +63,11 @@ selection_from_db (void)
                 sizeof (S.base_colors_data), S.base_colors_data,
                 GL_STATIC_DRAW);
 
+  /*
+   * Rebuild the display list.
+   */
+  map_geometry ();
+
   glutPostRedisplay ();
 
   return;
diff --git a/src/model/density_legend_geometry.c b/src/model/density_legend_geometry.c
index ab3e46c..7e30de8 100644
--- a/src/model/density_legend_geometry.c
+++ b/src/model/density_legend_geometry.c
@@ -2,7 +2,6 @@
 #include "../view/exp004state0.h"
 #include "../controller/exp004reshape.h"
 #include <GL/glut.h>
-#include <stdio.h>
 
 #define S exp004state0
 
@@ -15,13 +14,6 @@ density_legend_geometry (void)
              DEFAULT_COLOR_A);
 
   /*
-   * This value should be a percentage of the world height so that it
-   * remains a fixed number of pixels tall when the window is resized
-   * or zoomed.
-   */
-  double legend_height = 0.5;
-
-  /*
    * Calculate the bounding box for the legend.
    */
 
@@ -33,20 +25,30 @@ density_legend_geometry (void)
   const double *left;
   const double *right;
   const double *top;
+  const double *bottom;
 
   if (S.zoom.active)
     {
       left = &S.zoom.coords[0];
       right = &S.zoom.coords[1];
+      bottom = &S.zoom.coords[2];
       top = &S.zoom.coords[3];
     }
   else
     {
       left = &S.ortho.min_x;
-      top = &S.ortho.max_y;
       right = &S.ortho.max_x;
+      bottom = &S.ortho.min_y;
+      top = &S.ortho.max_y;
     }
 
+  /*
+   * This value should be a percentage of the world height so that it
+   * remains a fixed number of pixels tall when the window is resized
+   * or zoomed.
+   */
+  double legend_height = (*top - *bottom) / S.viewport.h * 10.0;
+
   a[0] = *left;
   a[1] = *top;
   b[0] = *right;
diff --git a/src/model/exp004state.h b/src/model/exp004state.h
index 5a9761a..6473028 100644
--- a/src/model/exp004state.h
+++ b/src/model/exp004state.h
@@ -24,7 +24,7 @@
 #define SELECT_COLOR_A 0.75
 
 typedef enum
-{ PROTEIN_GEOMETRY, DENSITY_LEGEND_GEOMETRY } LISTS;
+  { PROTEIN_GEOMETRY, DENSITY_LEGEND_GEOMETRY, MAP_GEOMETRY } LISTS;
 #define NUM_LISTS 2
 
 /*
@@ -102,6 +102,11 @@ typedef struct
 
   ZOOM_INFO zoom;
 
+  /*
+   * Display a legend on the map.
+   */
+  bool legend;
+
 } EXP004STATE;
 
 #endif // EXP004STATE_H
diff --git a/src/model/protein_geometry.c b/src/model/protein_geometry.c
index 001b578..dc71a4e 100644
--- a/src/model/protein_geometry.c
+++ b/src/model/protein_geometry.c
@@ -12,9 +12,11 @@ protein_geometry (void)
    */
   GLUquadricObj *obj = gluNewQuadric ();
   gluQuadricDrawStyle (obj, GLU_FILL);
+
   glNewList (S.list_offset + PROTEIN_GEOMETRY, GL_COMPILE);
   gluSphere (obj, 0.05, 20, 20);
   glEndList ();
+
   gluDeleteQuadric (obj);
 
   return;
diff --git a/src/view/exp004geometry.c b/src/view/exp004geometry.c
index 6f3bc17..76f39bb 100644
--- a/src/view/exp004geometry.c
+++ b/src/view/exp004geometry.c
@@ -1,7 +1,4 @@
-/* I seem to need this for glGenBuffers as per
-   http://www.gamedev.net/community/forums/topic.asp?topic_id=422358 */
 #define GL_GLEXT_PROTOTYPES
-
 #include "exp004geometry.h"
 #include "exp004state0.h"
 #include <GL/glut.h>
@@ -14,21 +11,16 @@ exp004geometry (GLenum mode)
   glMatrixMode (GL_MODELVIEW);
   glLoadIdentity ();
 
-  glPointSize (0.1);
-  glColor3f (0.2, 0.2, 0.2);
-
-  for (int i = 0; i < ROWS; i++)
-    {
-      glLoadName (i);
-      glPushMatrix ();
-      glTranslatef (S.base_vertices_data[i][0],
-                    S.base_vertices_data[i][1], 0.0);
-      glColor4fv (S.base_colors_data[i]);
-      glCallList (S.list_offset + PROTEIN_GEOMETRY);
-      glPopMatrix ();
-    }
+  /*
+   * Draw the map.
+   */
+  glCallList (S.list_offset + MAP_GEOMETRY);
 
-  glCallList (S.list_offset + DENSITY_LEGEND_GEOMETRY);
+  /*
+   * Draw the legend.
+   */
+  if (S.legend)
+    glCallList (S.list_offset + DENSITY_LEGEND_GEOMETRY);
 
   return;
 }
diff --git a/src/view/exp004init.c b/src/view/exp004init.c
index ab12d2a..78311e6 100644
--- a/src/view/exp004init.c
+++ b/src/view/exp004init.c
@@ -1,6 +1,7 @@
 #include "exp004init.h"
 #include "exp004state0.h"
 #include "../model/density_legend_geometry.h"
+#include "../model/map_geometry.h"
 #include "../model/protein_geometry.h"
 #include "../model/selection_info_init.h"
 #include "../model/zoom_info_init.h"
@@ -13,10 +14,12 @@ exp004init (void)
 {
   selection_info_init (&S.selection);
   zoom_info_init (&S.zoom);
+  S.legend = true;
 
   S.list_offset = glGenLists (NUM_LISTS);
   protein_geometry ();
   density_legend_geometry ();
+  map_geometry ();
 
   return;
 }