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panelOpenGL.c

/*   EXTRAITS DE LA LICENCE
      Copyright CEA, contributeurs : Luc BILLARD et Damien
      CALISTE, laboratoire L_Sim, (2001-2005)
  
      Adresse mèl :
      BILLARD, non joignable par mèl ;
      CALISTE, damien P caliste AT cea P fr.

      Ce logiciel est un programme informatique servant à visualiser des
      structures atomiques dans un rendu pseudo-3D. 

      Ce logiciel est régi par la licence CeCILL soumise au droit français et
      respectant les principes de diffusion des logiciels libres. Vous pouvez
      utiliser, modifier et/ou redistribuer ce programme sous les conditions
      de la licence CeCILL telle que diffusée par le CEA, le CNRS et l'INRIA 
      sur le site "http://www.cecill.info".

      Le fait que vous puissiez accéder à cet en-tête signifie que vous avez 
      pris connaissance de la licence CeCILL, et que vous en avez accepté les
      termes (cf. le fichier Documentation/licence.fr.txt fourni avec ce logiciel).
*/

/*   LICENCE SUM UP
      Copyright CEA, contributors : Luc BILLARD et Damien
      CALISTE, laboratoire L_Sim, (2001-2005)

      E-mail address:
      BILLARD, not reachable any more ;
      CALISTE, damien P caliste AT cea P fr.

      This software is a computer program whose purpose is to visualize atomic
      configurations in 3D.

      This software is governed by the CeCILL  license under French law and
      abiding by the rules of distribution of free software.  You can  use, 
      modify and/ or redistribute the software under the terms of the CeCILL
      license as circulated by CEA, CNRS and INRIA at the following URL
      "http://www.cecill.info". 

      The fact that you are presently reading this means that you have had
      knowledge of the CeCILL license and that you accept its terms. You can
      find a copy of this licence shipped with this software at Documentation/licence.en.txt.
*/
#include "panelOpenGL.h"

#include <visu_object.h>
#include <support.h>
#include <gtk_main.h>
#include <opengl.h>
#include <visu_extension.h>
#include <openGLFunctions/light.h>
#include <openGLFunctions/renderingMode.h>
#include <openGLFunctions/view.h>

static int disableCallbacksOpenGL;
static GtkListStore *light_list_store;
static GtkWidget *panelOpenGL;

#define OPENGL_FOLLOW_GLOBAL_RENDERING_MODE _("Follow global setting")

/* Local callbacks. */
void comboOpenGLRenderingChanged(GtkComboBox *combobox, gpointer data);
void addPresetOneLightClicked(GtkButton *button, gpointer data);
void addPresetFourLightsClicked(GtkButton *button, gpointer data);
static void selectionChanged(GtkTreeSelection *tree, gpointer data);
static void addNewLightClicked(GtkButton *button, gpointer data);
static void removeSelectedLightsClicked(GtkButton *button, gpointer data);
static void renderingModeEdited(GtkCellRendererText *cellrenderertext,
                        gchar *path, gchar *text, gpointer user_data);
static void onOpenGLEnter(ToolPanel *toolPanel, gpointer data);

ToolPanel* initPanelOpenGL()
{
  char *cl = _("Set OpenGL parameters");
  char *tl = _("OpenGL");

  panelOpenGL = toolPanelNew_withIconFromStock("Panel_opengl", cl, tl, GTK_STOCK_EXECUTE);
  if (!panelOpenGL)
    return (ToolPanel*)0;
  gtk_container_add(GTK_CONTAINER(panelOpenGL), createInteriorOpenGL());
  toolPanelSet_dockable(TOOL_PANEL(panelOpenGL), TRUE);

  /* Create the callbacks of all the sensitive widgets. */
  createCallBacksOpenGL();
  g_signal_connect(G_OBJECT(panelOpenGL), "page-entered",
               G_CALLBACK(onOpenGLEnter), (gpointer)0);

  /* Private parameters. */
  disableCallbacksOpenGL = 0;

  return TOOL_PANEL(panelOpenGL);
}

enum {
  LIGHT_POINTER_TO,
  LIGHT_ENABLED,
  LIGHT_POSITION0,
  LIGHT_POSITION1,
  LIGHT_POSITION2,
  LIGHT_MULTIPLIER,
  LIGHT_N_PARAMETERS
};

enum {
  RENDERING_POINTER_TO,
  RENDERING_NAME,
  RENDERING_MODE,
  RENDERING_N_PARAMETERS
};

void light_store_in_list_store(gpointer data, gpointer user_data)
{
  Light *light0 = data;
  GtkTreeIter iter;
  GtkListStore *list;

  g_return_if_fail(user_data);
  list = GTK_LIST_STORE(user_data);

  gtk_list_store_append(list, &iter);
  gtk_list_store_set(list, &iter,
                 LIGHT_POINTER_TO, (gpointer)light0,
                 LIGHT_ENABLED, light0->enabled,
                 LIGHT_POSITION0, light0->position[0],
                 LIGHT_POSITION1, light0->position[1],
                 LIGHT_POSITION2, light0->position[2], 
                 LIGHT_MULTIPLIER, light0->multiplier, -1);
}

void light_tree_show_hide(GtkCellRendererToggle *cell_renderer, 
                    gchar *string_path, gpointer user_data)
{
  GtkTreePath* path = gtk_tree_path_new_from_string(string_path);
  GtkTreeIter iter;
  gboolean status;
  Light *light0;
  GtkListStore *list;

  g_return_if_fail(user_data);
  list = GTK_LIST_STORE(user_data);

  if(gtk_tree_model_get_iter(GTK_TREE_MODEL(light_list_store), &iter, path) == FALSE)
    return;

  status = gtk_cell_renderer_toggle_get_active(cell_renderer) ? FALSE : TRUE;
  gtk_list_store_set(list, &iter,
                 LIGHT_ENABLED, status, -1);
  gtk_tree_model_get(GTK_TREE_MODEL(list), &iter,
                 LIGHT_POINTER_TO, &light0, -1);

  light0->enabled = status;

  status = lightEnvironnementApply(currentLights);
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}

void light_update(GtkCellRendererText *cellrenderertext,
              gchar *path, gchar *text, gpointer user_data)
{
  GtkTreeIter iter;
  float new_value = atof(text);
  Light *light0;
  gboolean status;

  if(gtk_tree_model_get_iter_from_string(GTK_TREE_MODEL(light_list_store),
                               &iter, path))
    {      
      gtk_list_store_set(light_list_store, &iter,
                   GPOINTER_TO_INT(user_data), new_value, -1);
      gtk_tree_model_get(GTK_TREE_MODEL(light_list_store), &iter, 
                   LIGHT_POINTER_TO, &light0, -1);
    }

  if (GPOINTER_TO_INT(user_data) == LIGHT_MULTIPLIER)
    light0->multiplier = new_value;
  else
    light0->position[GPOINTER_TO_INT(user_data)-LIGHT_POSITION0] = new_value;
                   
  status = lightEnvironnementApply(currentLights);
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}

void light_sync_lists(GtkListStore *list)
{
  g_return_if_fail(list);

  gtk_list_store_clear(list);
  g_list_foreach(lightEnvironnementGet_lightList(currentLights),
             light_store_in_list_store, (gpointer)list);  
}

GtkWidget* lights_make_tree_view()
{
  GtkTreeViewColumn* column; 
  GtkCellRenderer *cell_show = gtk_cell_renderer_toggle_new();
  GtkCellRenderer *cell_float;
  GtkWidget *light_tree_view;

  light_list_store =
    gtk_list_store_new(LIGHT_N_PARAMETERS, G_TYPE_POINTER,
                   G_TYPE_BOOLEAN, G_TYPE_FLOAT, G_TYPE_FLOAT,
                   G_TYPE_FLOAT, G_TYPE_FLOAT);
  light_tree_view =
    gtk_tree_view_new_with_model(GTK_TREE_MODEL(light_list_store));

  light_sync_lists(light_list_store);

  g_signal_connect(cell_show, "toggled", G_CALLBACK(light_tree_show_hide),
               (gpointer)light_list_store);

  column = gtk_tree_view_column_new_with_attributes(_("Use"), cell_show,
                                        "active", LIGHT_ENABLED, NULL);
  gtk_tree_view_column_set_expand(column, FALSE);
  gtk_tree_view_column_set_alignment(column, 0.5);
  gtk_tree_view_append_column (GTK_TREE_VIEW (light_tree_view), column);

  cell_float = gtk_cell_renderer_text_new();
  g_object_set(G_OBJECT(cell_float), "editable", TRUE, NULL);
  g_signal_connect(G_OBJECT(cell_float), "edited",
               G_CALLBACK(light_update), GINT_TO_POINTER(LIGHT_POSITION0));
  column = gtk_tree_view_column_new_with_attributes(_("x"), cell_float,
                                        "text", LIGHT_POSITION0, NULL);
  gtk_tree_view_append_column (GTK_TREE_VIEW (light_tree_view), column);
  
  cell_float = gtk_cell_renderer_text_new();
  g_object_set(G_OBJECT(cell_float), "editable", TRUE, NULL);
  g_signal_connect(G_OBJECT(cell_float), "edited",
               G_CALLBACK(light_update), GINT_TO_POINTER(LIGHT_POSITION1));
  column = gtk_tree_view_column_new_with_attributes(_("y"), cell_float,
                                        "text", LIGHT_POSITION1, NULL);
  gtk_tree_view_append_column (GTK_TREE_VIEW (light_tree_view), column);

  cell_float = gtk_cell_renderer_text_new();
  g_object_set(G_OBJECT(cell_float), "editable", TRUE, NULL);
  g_signal_connect(G_OBJECT(cell_float), "edited",
               G_CALLBACK(light_update), GINT_TO_POINTER(LIGHT_POSITION2));
  column = gtk_tree_view_column_new_with_attributes(_("z"), cell_float,
                                        "text", LIGHT_POSITION2, NULL);
  gtk_tree_view_append_column (GTK_TREE_VIEW (light_tree_view), column);

  cell_float = gtk_cell_renderer_text_new();
  g_object_set(G_OBJECT(cell_float), "editable", TRUE, NULL);
  g_signal_connect(G_OBJECT(cell_float), "edited",
               G_CALLBACK(light_update), GINT_TO_POINTER(LIGHT_MULTIPLIER));
  column = gtk_tree_view_column_new_with_attributes(_("power"), cell_float,
                                        "text", LIGHT_MULTIPLIER, NULL);
  gtk_tree_view_append_column (GTK_TREE_VIEW (light_tree_view), column);
  gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (light_tree_view), TRUE);

  gtk_tree_selection_set_mode(gtk_tree_view_get_selection(GTK_TREE_VIEW(light_tree_view)),
                        GTK_SELECTION_MULTIPLE);

  return light_tree_view;
}

GtkWidget* make_renderingTreeView()
{
#if GTK_MINOR_VERSION > 5
  GtkTreeViewColumn* column; 
  GtkCellRenderer *renderer;
  GtkWidget *renderingTreeView;
  GtkListStore *renderingListStore;
  GtkListStore *namesListStore;
  GtkTreeIter iter;
  const char** names;
  int i;
  GList *list;
  const char *modeName;

  /* Initialize the model that store the possibilities
     for the cellRendererComboBox. */
  namesListStore = gtk_list_store_new(1, G_TYPE_STRING);
  gtk_list_store_append(namesListStore, &iter);
  gtk_list_store_set(namesListStore, &iter,
                 0, OPENGL_FOLLOW_GLOBAL_RENDERING_MODE, -1);
  names = openGLGet_allRenderingModesI18n();
  for (i = 0; names[i]; i++)
    {
      gtk_list_store_append(namesListStore, &iter);
      gtk_list_store_set(namesListStore, &iter,
                   0, names[i], -1);
    }

  /* Initialize the model that stores the extensions. */
  renderingListStore =
    gtk_list_store_new(RENDERING_N_PARAMETERS, G_TYPE_POINTER,
                   G_TYPE_STRING, G_TYPE_STRING);
  list = OpenGLExtensionGet_list();
  while(list)
    {
      if (((OpenGLExtension*)list->data)->isSensitiveToRenderingMode)
      {
        if (((OpenGLExtension*)list->data)->preferedRenderingMode == -1)
          modeName = OPENGL_FOLLOW_GLOBAL_RENDERING_MODE;
        else
          modeName = names[((OpenGLExtension*)list->data)->preferedRenderingMode];
        gtk_list_store_append(renderingListStore, &iter);
        gtk_list_store_set(renderingListStore, &iter,
                       RENDERING_POINTER_TO, list->data,
                       RENDERING_NAME, ((OpenGLExtension*)list->data)->name,
                       RENDERING_MODE, modeName, -1);
      }
      list = g_list_next(list);
    }

  renderingTreeView =
    gtk_tree_view_new_with_model(GTK_TREE_MODEL(renderingListStore));

  renderer = gtk_cell_renderer_text_new();
  column = gtk_tree_view_column_new_with_attributes(_("name of extension"), renderer,
                                        "text", RENDERING_NAME, NULL);
  gtk_tree_view_column_set_expand(column, TRUE);
  gtk_tree_view_column_set_alignment(column, 0.);
  gtk_tree_view_append_column(GTK_TREE_VIEW(renderingTreeView), column);

  renderer = gtk_cell_renderer_combo_new();
  g_object_set(G_OBJECT(renderer), "has-entry", FALSE,
             "model", namesListStore, "text-column", 0,
             "editable", TRUE, NULL);
  g_signal_connect(G_OBJECT(renderer), "edited",
               G_CALLBACK(renderingModeEdited), (gpointer)renderingListStore);
  column = gtk_tree_view_column_new_with_attributes(_("mode"), renderer,
                                        "text", RENDERING_MODE, NULL);
  gtk_tree_view_column_set_alignment(column, 0.5);
  gtk_tree_view_append_column(GTK_TREE_VIEW(renderingTreeView), column);
  
  return renderingTreeView;
#else
  return (GtkWidget*)0;
#endif
}
  
void addNewLightClicked(GtkButton *button, gpointer data)
{
  Light *light0;
  GtkTreeIter iter;
  gboolean status;

  g_return_if_fail(data);

  if(gtk_tree_model_iter_n_children(GTK_TREE_MODEL(data), (GtkTreeIter*)0) >= GL_MAX_LIGHTS)
    {
      raiseAlertDialog(_("The maximm number of lights allowed by OpenGL"
                   " has been reached, can't add more."));
      return;
    }

  light0 = light_newDefault();
  status = lightEnvironnementAdd_light(currentLights, light0);

  if (!status)
    return;

  gtk_list_store_append(GTK_LIST_STORE(data), &iter);
  gtk_list_store_set(GTK_LIST_STORE(data), &iter,
                 LIGHT_POINTER_TO, (gpointer)light0,
                 LIGHT_ENABLED, light0->enabled,
                 LIGHT_POSITION0, light0->position[0],
                 LIGHT_POSITION1, light0->position[1],
                 LIGHT_POSITION2, light0->position[2], 
                 LIGHT_MULTIPLIER, light0->multiplier, -1);

  status = lightEnvironnementApply(currentLights);
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}
void removeSelectedLightsClicked(GtkButton *button, gpointer data)
{
  GList *tmpLst, *selectedRows;
  GtkTreeIter iter;
  gboolean validIter, status;
  Light *light0;
  GtkTreeIter *removableIter;

  g_return_if_fail(GTK_TREE_SELECTION(data));

  selectedRows =
    gtk_tree_selection_get_selected_rows(GTK_TREE_SELECTION(data), NULL);
  tmpLst = selectedRows;
  while (tmpLst)
    {
      validIter = gtk_tree_model_get_iter(GTK_TREE_MODEL(light_list_store),
                                &iter, (GtkTreePath*)tmpLst->data);
      gtk_tree_path_free((GtkTreePath*)tmpLst->data);
      tmpLst->data = (gpointer)0;
      if (!validIter)
      g_warning("Wrong 'path' variable in 'removeSelectedLightsClicked' method.\n");
      else
      {
        gtk_tree_model_get(GTK_TREE_MODEL(light_list_store), &iter,
                       LIGHT_POINTER_TO, &light0,
                       -1);
        lightEnvironnementDelete_light(currentLights, light0);
        removableIter = g_malloc(sizeof(GtkTreeIter));
        *removableIter = iter;
        tmpLst->data = (gpointer)removableIter;
      }
      tmpLst = g_list_next(tmpLst);
    }
  tmpLst = selectedRows;
  while (tmpLst)
    {
      if (tmpLst->data)
      {
        gtk_list_store_remove(light_list_store, (GtkTreeIter*)tmpLst->data);
        g_free(tmpLst->data);
      }
      tmpLst = g_list_next(tmpLst);
    }  
  g_list_free(selectedRows);

  status = lightEnvironnementApply(currentLights);
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}
void selectionChanged(GtkTreeSelection *tree, gpointer data)
{
  gint nb;

  g_return_if_fail(GTK_WIDGET(data));

  nb = gtk_tree_selection_count_selected_rows(tree);
  if (nb == 0)
    gtk_widget_set_sensitive(GTK_WIDGET(data), FALSE);
  else
    gtk_widget_set_sensitive(GTK_WIDGET(data), TRUE);
}


GtkWidget *createInteriorOpenGL()
{
  GtkWidget *vbox, *hbox;
  GtkWidget *label;
  GtkWidget *table;
  GtkWidget *align;
  GtkObject *adj;
  GtkWidget *scrollLight, *scrollRendering;
  GtkWidget *button;
  GtkWidget *image;
  GtkWidget *scroll, *viewport;
  GtkWidget *expanderLight, *vbox2, *expanderRendering;
  GtkWidget *light_tree_view, *renderingTreeView;
  const char** names;
  int i;

  scroll = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

  viewport = gtk_viewport_new(NULL, NULL);
  gtk_container_add(GTK_CONTAINER(scroll), viewport);

  vbox = gtk_vbox_new(FALSE, 0);
  gtk_container_add(GTK_CONTAINER(viewport), vbox);

  hbox = gtk_hbox_new(FALSE, 0);
  label = gtk_label_new(_("Redraw immediately after changes :"));
  gtk_widget_set_name(label, "label_head");
  gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 2);
  checkImmediateDrawing = gtk_check_button_new();
/*   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkImmediateDrawing), */
/*                       (gboolean)get); */
  gtk_box_pack_start(GTK_BOX(hbox), checkImmediateDrawing, FALSE, FALSE, 2);
  gtk_widget_show(checkImmediateDrawing);
  gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 5);

  table = gtk_table_new(2, 1, FALSE);
  gtk_box_pack_start(GTK_BOX(vbox), table, FALSE, FALSE, 5);
  align = gtk_alignment_new(0., 0.5, 0., 0.);
  gtk_table_attach(GTK_TABLE(table), align, 0, 1, 0, 1, GTK_FILL | GTK_EXPAND, GTK_SHRINK, 2, 0);
  label = gtk_label_new(_("Choose a rendering option :"));
  gtk_widget_set_name(label, "label_head");
  gtk_container_add(GTK_CONTAINER(align), label);
  align = gtk_alignment_new(1.0, 0.5, 0., 0.);
  gtk_table_attach(GTK_TABLE(table), align, 0, 1, 1, 2, GTK_FILL | GTK_EXPAND, GTK_SHRINK, 2, 0);

  comboOpenGLRendering = gtk_combo_box_new_text();
  names = openGLGet_allRenderingModesI18n();
  if (names)
    for (i = 0; names[i]; i++)
      gtk_combo_box_append_text(GTK_COMBO_BOX(comboOpenGLRendering), names[i]);
  else
    g_warning("No OpenGL rendering mode available.");
  gtk_combo_box_set_active(GTK_COMBO_BOX(comboOpenGLRendering), 0);
  gtk_container_add(GTK_CONTAINER(align), comboOpenGLRendering);
  g_signal_connect(G_OBJECT(comboOpenGLRendering), "changed",
               G_CALLBACK(comboOpenGLRenderingChanged), (gpointer)0);

  hbox = gtk_hbox_new(FALSE, 0);
  label = gtk_label_new(_("Precision (100 is normal) : "));
  gtk_widget_set_name(label, "label_head");
  gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 2);
  adj = gtk_adjustment_new(5., 10., 500., 5., 1.0, 1.0);
  spinPrecision = gtk_spin_button_new(GTK_ADJUSTMENT(adj), 0.01, 0);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(spinPrecision),
                      OpenGLViewGet_precision() * 100.);
  gtk_box_pack_start(GTK_BOX(hbox), spinPrecision, FALSE, FALSE, 2);
  gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 5);

  hbox = gtk_hbox_new(FALSE, 0);
  label = gtk_label_new(_("Antialiase lines :"));
  gtk_widget_set_name(label, "label_head");
  gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 2);
  checkAntialiasing = gtk_check_button_new();
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkAntialiasing),
                         (gboolean)getAntialias());
  gtk_box_pack_start(GTK_BOX(hbox), checkAntialiasing, FALSE, FALSE, 2);
  gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 5);

  /*********************/
  /* Light parameters. */
  /*********************/
  expanderLight = gtk_expander_new(_("Light sources"));
  label = gtk_expander_get_label_widget(GTK_EXPANDER(expanderLight));
  gtk_widget_set_name(label, "label_head");
  gtk_box_pack_start(GTK_BOX(vbox), expanderLight, TRUE, TRUE, 5);
  hbox = gtk_hbox_new(FALSE, 0);
  gtk_container_add(GTK_CONTAINER(expanderLight), hbox);
  scrollLight = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrollLight),
                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  gtk_box_pack_start(GTK_BOX(hbox), scrollLight, TRUE, TRUE, 0);
  light_tree_view = lights_make_tree_view();
  gtk_container_add(GTK_CONTAINER(scrollLight), light_tree_view);
  vbox2 = gtk_vbox_new(FALSE, 0);
  gtk_box_pack_start(GTK_BOX(hbox), vbox2, FALSE, FALSE, 0);
  button = gtk_button_new();
  image = gtk_image_new_from_stock(GTK_STOCK_ADD,
                           GTK_ICON_SIZE_BUTTON);
  gtk_container_add(GTK_CONTAINER(button), image);
  g_signal_connect(G_OBJECT(button), "clicked",
               G_CALLBACK(addNewLightClicked),
               (gpointer)gtk_tree_view_get_model(GTK_TREE_VIEW(light_tree_view)));
  gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 1);
  button = gtk_button_new();
  gtk_widget_set_sensitive(button, FALSE);
  image = gtk_image_new_from_stock(GTK_STOCK_REMOVE,
                           GTK_ICON_SIZE_BUTTON);
  gtk_container_add(GTK_CONTAINER(button), image);
  g_signal_connect(G_OBJECT(button), "clicked",
               G_CALLBACK(removeSelectedLightsClicked),
               (gpointer)gtk_tree_view_get_selection(GTK_TREE_VIEW(light_tree_view)));
  gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 1);
  g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(GTK_TREE_VIEW(light_tree_view))),
               "changed", G_CALLBACK(selectionChanged), (gpointer)button);

  button = gtk_button_new();
  image = create_pixmap(mainWindow, "stock-one-light_20.png");
  gtk_container_add(GTK_CONTAINER(button), image);
  g_signal_connect(G_OBJECT(button), "clicked",
               G_CALLBACK(addPresetOneLightClicked),
               (gpointer)gtk_tree_view_get_model(GTK_TREE_VIEW(light_tree_view)));
  gtk_box_pack_end(GTK_BOX(vbox2), button, FALSE, FALSE, 1);
  button = gtk_button_new();
  image = create_pixmap(mainWindow, "stock-four-lights_20.png");
  gtk_container_add(GTK_CONTAINER(button), image);
  g_signal_connect(G_OBJECT(button), "clicked",
               G_CALLBACK(addPresetFourLightsClicked),
               (gpointer)gtk_tree_view_get_model(GTK_TREE_VIEW(light_tree_view)));
  gtk_box_pack_end(GTK_BOX(vbox2), button, FALSE, FALSE, 1);

  /******************************/
  /* Rendering mode parameters. */
  /******************************/
#if GTK_MINOR_VERSION > 5
  expanderRendering = gtk_expander_new(_("Per extension rendering mode"));
  label = gtk_expander_get_label_widget(GTK_EXPANDER(expanderRendering));
  gtk_widget_set_name(label, "label_head");
  gtk_box_pack_start(GTK_BOX(vbox), expanderRendering, TRUE, TRUE, 5);
  scrollRendering = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrollRendering),
                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  gtk_container_add(GTK_CONTAINER(expanderRendering), scrollRendering);
  renderingTreeView = make_renderingTreeView();
  gtk_widget_set_size_request(renderingTreeView, -1, 120);
  gtk_container_add(GTK_CONTAINER(scrollRendering), renderingTreeView);
#endif
  
  gtk_widget_show_all(scroll);
  return scroll;
}

void createCallBacksOpenGL()
{
  g_signal_connect((gpointer)spinPrecision, "value-changed",
               G_CALLBACK(precisionChanged), (gpointer)0);
  g_signal_connect((gpointer)checkAntialiasing, "toggled",
               G_CALLBACK(antialisingCheckChanged), (gpointer)0);
  g_signal_connect((gpointer)checkImmediateDrawing, "toggled",
               G_CALLBACK(immediateDrawingCheckChanged), (gpointer)0);
}

/*************/
/* Callbacks */
/*************/
void immediateDrawingCheckChanged(GtkToggleButton *button, gpointer data)
{
  if (disableCallbacksOpenGL)
    return;

  setImmediateDrawing(gtk_toggle_button_get_active(button));
}
void comboOpenGLRenderingChanged(GtkComboBox *combobox, gpointer data)
{
  int mode;
  
  if (disableCallbacksOpenGL)
    return;

  mode = (int)gtk_combo_box_get_active(combobox);

  if (openGLSet_globalRenderingMode(mode))
    g_signal_emit (visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id,
               0 , NULL);
}
void antialisingCheckChanged(GtkToggleButton *button, gpointer data)
{
  if (disableCallbacksOpenGL)
    return;

  if (setAntialias(gtk_toggle_button_get_active(button)))
    g_signal_emit (visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id,
               0 , NULL);
}
void precisionChanged(GtkButton *button, gpointer user_data)
{
  float prec;
  VisuData *dataObj;

  if (disableCallbacksOpenGL)
    return;

  prec = (float)gtk_spin_button_get_value(GTK_SPIN_BUTTON(spinPrecision));
  if (OpenGLViewSet_precision(prec / 100.))
    {
      dataObj = toolPanelGet_visuData(TOOL_PANEL(panelOpenGL));
      visuDataEmit_facettesChanged(dataObj);
      visuData_createAllElements(dataObj); 
      g_signal_emit (visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id,
                 0 , NULL);
    }
}
static void onOpenGLEnter(ToolPanel *toolPanel, gpointer data)
{
  disableCallbacksOpenGL = 1;
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkImmediateDrawing),
                         (gboolean)getImmediateDrawing());
  gtk_combo_box_set_active(GTK_COMBO_BOX(comboOpenGLRendering),
                     openGLGet_globalRenderingOption());
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(spinPrecision),
                      OpenGLViewGet_precision() * 100.);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkAntialiasing),
                         (gboolean)getAntialias());
  disableCallbacksOpenGL = 0;
}
void addPresetOneLightClicked(GtkButton *button, gpointer data)
{
  Light *light;
  gboolean status;

  g_return_if_fail(data);

  status = lightEnvironnementEmpty_lightList(currentLights);

  light = light_newDefault();
  status = lightEnvironnementAdd_light(currentLights, light) || status;

  light_sync_lists(GTK_LIST_STORE(data)); 

  status = lightEnvironnementApply(currentLights) || status;
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}
void addPresetFourLightsClicked(GtkButton *button, gpointer data)
{
  Light *light;
  gboolean status;

  g_return_if_fail(data);

  status = lightEnvironnementEmpty_lightList(currentLights);

  light = light_newDefault();
  light->multiplier = 0.25;
  status = lightEnvironnementAdd_light(currentLights, light) || status;

  light = light_newDefault();
  light->position[0] *= -1.;
  light->multiplier = 0.25;
  status = lightEnvironnementAdd_light(currentLights, light) || status;

  light = light_newDefault();
  light->position[1] *= -1.;
  light->multiplier = 0.25;
  status = lightEnvironnementAdd_light(currentLights, light) || status;

  light = light_newDefault();
  light->position[0] *= -1.;
  light->position[1] *= -1.;
  light->multiplier = 0.25;
  status = lightEnvironnementAdd_light(currentLights, light) || status;

  light_sync_lists(GTK_LIST_STORE(data)); 

  status = lightEnvironnementApply(currentLights) || status;
  if (status)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}
static void renderingModeEdited(GtkCellRendererText *cellrenderertext,
                        gchar *path, gchar *text, gpointer user_data)
{
  GtkListStore *list;
  gboolean valid;
  GtkTreeIter iter;
  const char** names;
  int mode;
  OpenGLExtension *ext;

  list = GTK_LIST_STORE(user_data);
  g_return_if_fail(list);

  valid = gtk_tree_model_get_iter_from_string(GTK_TREE_MODEL(list),
                                    &iter, path);
  g_return_if_fail(valid);

  if (!strcmp(text, OPENGL_FOLLOW_GLOBAL_RENDERING_MODE))
    {
      valid = TRUE;
      mode = -1;
    }
  else
    {
      valid = FALSE;
      names = openGLGet_allRenderingModesI18n();
      for (mode = 0; names[mode] && !valid; mode++)
      valid = !strcmp(text, names[mode]);
    }
  g_return_if_fail(valid);

  gtk_tree_model_get(GTK_TREE_MODEL(list), &iter, 
                 RENDERING_POINTER_TO, &ext, -1);
  valid = OpenGLExtensionSet_preferedRenderingMode(ext, mode - 1);

  if (mode == -1)
    gtk_list_store_set(list, &iter,
                   RENDERING_MODE, OPENGL_FOLLOW_GLOBAL_RENDERING_MODE, -1);
  else
    {
      names = openGLGet_allRenderingModesI18n();
      gtk_list_store_set(list, &iter,
                   RENDERING_MODE, names[mode - 1], -1);
    }

  if (valid)
    g_signal_emit(visu, VISU_GET_CLASS (visu)->OpenGLAskForReDraw_signal_id, 0, NULL);
}

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