cma_fe.c

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/***********************************************************************
 Freeciv - Copyright (C) 2001 - R. Falke, M. Kaufman
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include <gdk/gdkkeysyms.h>
 
/* utility */
#include "fcintl.h"
#include "log.h"
#include "mem.h"
#include "support.h"
 
/* common */
#include "events.h"
#include "game.h"
 
/* client */
#include "chatline_g.h"
#include "citydlg_g.h"
#include "client_main.h"
#include "cma_fec.h"
#include "messagewin_g.h"
#include "options.h"
 
/* client/gui-gtk-3.0 */
#include "cityrep.h"
#include "dialogs.h"
#include "gui_main.h"
#include "gui_stuff.h"
#include "helpdlg.h"
#include "inputdlg.h"
 
#include "cma_fe.h"
 
#define BUFFER_SIZE             64
 
#define SPECLIST_TAG dialog
#define SPECLIST_TYPE struct cma_dialog
#include "speclist.h"
 
#define dialog_list_iterate(dialoglist, pdialog) \
    TYPED_LIST_ITERATE(struct cma_dialog, dialoglist, pdialog)
#define dialog_list_iterate_end  LIST_ITERATE_END
 
static struct dialog_list *dialog_list;
 
static int allow_refreshes = 1;
 
static struct cma_dialog *get_cma_dialog(struct city *pcity);
 
static void update_cma_preset_list(struct cma_dialog *pdialog);
 
static gboolean cma_preset_key_pressed_callback(GtkWidget *w, GdkEventKey *ev,
                                                gpointer data);
static void cma_del_preset_callback(GtkWidget *w, gpointer data);
static void cma_preset_remove(struct cma_dialog *pdialog, int preset_index);
static void cma_preset_remove_response(GtkWidget *w, gint response,
                                       gpointer data);
 
static void cma_add_preset_callback(GtkWidget *w, gpointer data);
static void cma_preset_add_popup_callback(gpointer data, gint response,
                                          const char *input);
 
static void cma_active_callback(GtkWidget *w, gpointer data);
static void cma_activate_preset_callback(GtkTreeView *view, GtkTreePath *path,
                                         GtkTreeViewColumn *col, gpointer data);
 
static void hscale_changed(GtkWidget *get, gpointer data);
static void set_hscales(const struct cm_parameter *const parameter,
                        struct cma_dialog *pdialog);
 
/**********************************************************************/
void cma_fe_init(void)
{
  dialog_list = dialog_list_new();
}
 
/**********************************************************************/
void cma_fe_done(void)
{
  dialog_list_destroy(dialog_list);
}
 
/**********************************************************************/
void close_cma_dialog(struct city *pcity)
{
  struct cma_dialog *pdialog = get_cma_dialog(pcity);
 
  if (pdialog == NULL) {
    /* A city which is being investigated doesn't contain cma dialog */
    return;
  }
  gtk_widget_destroy(pdialog->shell);
}
 
/**********************************************************************/
static void cma_dialog_destroy_callback(GtkWidget *w, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
 
  dialog_list_remove(dialog_list, pdialog);
  free(pdialog);
}
 
/**********************************************************************/
struct cma_dialog *get_cma_dialog(struct city *pcity)
{
  dialog_list_iterate(dialog_list, pdialog) {
    if (pdialog->pcity == pcity) {
      return pdialog;
    }
  } dialog_list_iterate_end;
 
  return NULL;
}
 
/**********************************************************************/
static gboolean button_press_callback(GtkTreeView *view, GdkEventButton *ev,
                                      gpointer data)
{
  GtkTreePath *path;
  GtkTreeViewColumn *column;
 
  if (gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(view),
        ev->x, ev->y, &path, &column, NULL, NULL)) {
    if (ev->type == GDK_BUTTON_PRESS) {
      cma_activate_preset_callback(view, path, column, data);
    } else if (ev->type == GDK_2BUTTON_PRESS) {
      struct cma_dialog *pdialog = (struct cma_dialog *) data;
      struct cm_parameter param;
 
      cmafec_get_fe_parameter(pdialog->pcity, &param);
      cma_put_city_under_agent(pdialog->pcity, &param);
      refresh_city_dialog(pdialog->pcity);
    }
  }
  gtk_tree_path_free(path);
 
  return FALSE;
}
 
/**********************************************************************/
static void help_callback(GtkWidget *w, gpointer data)
{
  popup_help_dialog_string(HELP_CMA_ITEM);
}
 
/**********************************************************************/
static void cell_data_func(GtkTreeViewColumn *col, GtkCellRenderer *cell,
                           GtkTreeModel *model, GtkTreeIter *it, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  gchararray s1;
  const char *s2;
  int i1, i2;
  struct cm_parameter param;
  GtkTreePath *path;
 
  gtk_tree_model_get(model, it, 0, &s1, -1);
  if (s1 == NULL) {
    return;
  }
  path = gtk_tree_model_get_path(model, it);
  i1 = gtk_tree_path_get_indices(path)[0];
  gtk_tree_path_free(path);
 
  cmafec_get_fe_parameter(pdialog->pcity, &param);
  s2 = cmafec_get_short_descr(&param);
  i2 = cmafec_preset_get_index_of_parameter(&param);
 
  if (!strcmp(s1, s2) && i1 == i2) {
    g_object_set(G_OBJECT(cell), "style", PANGO_STYLE_ITALIC,
                 "weight", PANGO_WEIGHT_BOLD, NULL);
  } else {
    g_object_set(G_OBJECT(cell), "style", PANGO_STYLE_NORMAL,
                 "weight", PANGO_WEIGHT_NORMAL, NULL);
  }
 
  g_free(s1);
}
 
/**********************************************************************/
struct cma_dialog *create_cma_dialog(struct city *pcity, bool tiny)
{
  struct cma_dialog *pdialog;
  struct cm_parameter param;
  GtkWidget *frame, *page, *hbox, *label, *table;
  GtkWidget *vbox, *sw, *hscale, *button, *image;
  GtkListStore *store;
  GtkCellRenderer *rend;
  GtkWidget *view;
  GtkTreeViewColumn *column;
  gint layout_width;
 
  cmafec_get_fe_parameter(pcity, &param);
  pdialog = fc_malloc(sizeof(struct cma_dialog));
  pdialog->pcity = pcity;
  pdialog->shell = gtk_grid_new();
  gtk_orientable_set_orientation(GTK_ORIENTABLE(pdialog->shell),
                                 GTK_ORIENTATION_VERTICAL);
  gtk_grid_set_row_spacing(GTK_GRID(pdialog->shell), 8);
  gtk_container_set_border_width(GTK_CONTAINER(pdialog->shell), 8);
  g_signal_connect(pdialog->shell, "destroy",
                   G_CALLBACK(cma_dialog_destroy_callback), pdialog);
 
  page = gtk_grid_new();
  gtk_grid_set_column_spacing(GTK_GRID(page), 12);
  gtk_container_add(GTK_CONTAINER(pdialog->shell), page);
 
  vbox = gtk_grid_new();
  gtk_orientable_set_orientation(GTK_ORIENTABLE(vbox),
                                 GTK_ORIENTATION_VERTICAL);
  gtk_grid_set_row_spacing(GTK_GRID(pdialog->shell), 2);
  gtk_container_add(GTK_CONTAINER(page), vbox);
 
  sw = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(sw),
                                      GTK_SHADOW_ETCHED_IN);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
                                 GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 
  store = gtk_list_store_new(1, G_TYPE_STRING);
  pdialog->store = store;
 
  view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
  gtk_widget_set_hexpand(view, TRUE);
  gtk_widget_set_vexpand(view, TRUE);
  g_object_unref(store);
  gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(view), FALSE);
  pdialog->preset_list = view;
  pdialog->selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(view));
 
  g_signal_connect(pdialog->preset_list, "button_press_event",
                   G_CALLBACK(button_press_callback), pdialog);
 
  gtk_widget_set_tooltip_text(view,
                              _("For information on\n"
                                "the citizen governor and governor presets,\n"
                                "including sample presets,\n"
                                "see README.governor."));
 
  rend = gtk_cell_renderer_text_new();
  column = gtk_tree_view_column_new_with_attributes(NULL, rend,
                                                    "text", 0, NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(view), column);
  gtk_tree_view_column_set_cell_data_func(column, rend, cell_data_func,
                                          pdialog, NULL);
 
  label = g_object_new(GTK_TYPE_LABEL,
                       "use-underline", TRUE,
                       "mnemonic-widget", view,
                       "label", _("Prese_ts:"),
                       "xalign", 0.0, "yalign", 0.5, NULL);
  gtk_container_add(GTK_CONTAINER(vbox), label);
 
  gtk_container_add(GTK_CONTAINER(sw), view);
  gtk_container_add(GTK_CONTAINER(vbox), sw);
 
  g_signal_connect(view, "row_activated",
                   G_CALLBACK(cma_activate_preset_callback), pdialog);
  g_signal_connect(view, "key-press-event",
                   G_CALLBACK(cma_preset_key_pressed_callback), pdialog);
 
  hbox = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
  gtk_button_box_set_layout(GTK_BUTTON_BOX(hbox), GTK_BUTTONBOX_EDGE);
  gtk_container_add(GTK_CONTAINER(vbox), hbox);
 
  button = gtk_button_new_with_mnemonic(_("Ne_w"));
  image = gtk_image_new_from_stock(GTK_STOCK_NEW, GTK_ICON_SIZE_BUTTON);
  gtk_button_set_image(GTK_BUTTON(button), image);
  gtk_container_add(GTK_CONTAINER(hbox), button);
  g_signal_connect(button, "clicked",
                   G_CALLBACK(cma_add_preset_callback), pdialog);
  pdialog->add_preset_command = button;
 
  pdialog->del_preset_command = gtk_button_new_from_stock(GTK_STOCK_DELETE);
  gtk_container_add(GTK_CONTAINER(hbox), pdialog->del_preset_command);
  g_signal_connect(pdialog->del_preset_command, "clicked",
                   G_CALLBACK(cma_del_preset_callback), pdialog);
 
  /* the right-hand side */
 
  vbox = gtk_grid_new();
  g_object_set(vbox, "margin", 2, NULL);
  gtk_orientable_set_orientation(GTK_ORIENTABLE(vbox),
                                 GTK_ORIENTATION_VERTICAL);
  gtk_container_add(GTK_CONTAINER(page), vbox);
 
  /* Result */
  if (!tiny) {
    frame = gtk_frame_new(_("Results"));
    gtk_widget_set_vexpand(frame, TRUE);
    gtk_widget_set_valign(frame, GTK_ALIGN_CENTER);
    gtk_container_add(GTK_CONTAINER(vbox), frame);
 
    pdialog->result_label =
      gtk_label_new("food\n prod\n trade\n\n people\n grow\n prod\n name");
    gtk_widget_set_name(pdialog->result_label, "city_label");
    gtk_container_add(GTK_CONTAINER(frame), pdialog->result_label);
    gtk_label_set_justify(GTK_LABEL(pdialog->result_label), GTK_JUSTIFY_LEFT);
  } else {
    pdialog->result_label = NULL;
  }
 
  /* Minimal Surplus and Factor */
 
  table = gtk_grid_new();
  g_object_set(table, "margin", 2, NULL);
  gtk_container_add(GTK_CONTAINER(vbox), table);
 
  label = gtk_label_new(_("Minimal Surplus"));
  gtk_widget_set_halign(label, GTK_ALIGN_START);
  gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
  gtk_grid_attach(GTK_GRID(table), label, 1, 0, 1, 1);
  label = gtk_label_new(_("Factor"));
  gtk_widget_set_halign(label, GTK_ALIGN_START);
  gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
  gtk_grid_attach(GTK_GRID(table), label, 2, 0, 1, 1);
 
  output_type_iterate(i) {
    label = gtk_label_new(get_output_name(i));
    gtk_grid_attach(GTK_GRID(table), label, 0, i + 1, 1, 1);
    gtk_widget_set_halign(label, GTK_ALIGN_START);
    gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
 
    pdialog->minimal_surplus[i] = hscale =
        gtk_scale_new(GTK_ORIENTATION_HORIZONTAL, NULL);
    gtk_range_set_range(GTK_RANGE(hscale),
                        GUI_GTK_OPTION(governor_range_min),
                        GUI_GTK_OPTION(governor_range_max));
    gtk_range_set_increments(GTK_RANGE(hscale), 1, 1);
    pango_layout_get_pixel_size(gtk_scale_get_layout(GTK_SCALE(hscale)),
                                &layout_width, NULL);
    gtk_widget_set_size_request(hscale, layout_width + 51 * 2, -1);
 
    gtk_grid_attach(GTK_GRID(table), hscale, 1, i + 1, 1, 1);
    gtk_scale_set_digits(GTK_SCALE(hscale), 0);
    gtk_scale_set_value_pos(GTK_SCALE(hscale), GTK_POS_LEFT);
 
    g_signal_connect(pdialog->minimal_surplus[i],
                     "value-changed",
                     G_CALLBACK(hscale_changed), pdialog);
 
    pdialog->factor[i] = hscale =
        gtk_scale_new(GTK_ORIENTATION_HORIZONTAL, NULL);
    gtk_range_set_range(GTK_RANGE(hscale), 0, 25);
    gtk_range_set_increments(GTK_RANGE(hscale), 1, 1);
    pango_layout_get_pixel_size(gtk_scale_get_layout(GTK_SCALE(hscale)),
                                &layout_width, NULL);
    gtk_widget_set_size_request(hscale, layout_width + 26 * 2, -1);
 
    gtk_grid_attach(GTK_GRID(table), hscale, 2, i + 1, 1, 1);
    gtk_scale_set_digits(GTK_SCALE(hscale), 0);
    gtk_scale_set_value_pos(GTK_SCALE(hscale), GTK_POS_LEFT);
 
    g_signal_connect(pdialog->factor[i], "value-changed",
                     G_CALLBACK(hscale_changed), pdialog);
  } output_type_iterate_end;
 
  /* Happy Surplus and Factor */
  label = gtk_label_new(_("Celebrate"));
  gtk_grid_attach(GTK_GRID(table), label, 0, O_LAST + 1, 1, 1);
  gtk_widget_set_halign(label, GTK_ALIGN_START);
  gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
 
  pdialog->happy_button = gtk_check_button_new();
  gtk_widget_set_halign(pdialog->happy_button, GTK_ALIGN_END);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(pdialog->happy_button),
                               FALSE);
  gtk_grid_attach(GTK_GRID(table), pdialog->happy_button, 1, O_LAST + 1, 1, 1);
 
  g_signal_connect(pdialog->happy_button, "toggled",
                   G_CALLBACK(hscale_changed), pdialog);
 
  pdialog->factor[O_LAST] = hscale =
      gtk_scale_new(GTK_ORIENTATION_HORIZONTAL, NULL);
  gtk_range_set_range(GTK_RANGE(hscale), 0, 50);
  gtk_range_set_increments(GTK_RANGE(hscale), 1, 1);
  pango_layout_get_pixel_size(gtk_scale_get_layout(GTK_SCALE(hscale)),
                              &layout_width, NULL);
  gtk_widget_set_size_request(hscale, layout_width + 51 * 2, -1);
 
  gtk_grid_attach(GTK_GRID(table), hscale, 2, O_LAST + 1, 1, 1);
  gtk_scale_set_digits(GTK_SCALE(hscale), 0);
  gtk_scale_set_value_pos(GTK_SCALE(hscale), GTK_POS_LEFT);
 
  g_signal_connect(pdialog->factor[O_LAST],
                   "value-changed",
                   G_CALLBACK(hscale_changed), pdialog);
 
  /* Maximize Growth */
  label = gtk_label_new(_("Maximize growth"));
  gtk_grid_attach(GTK_GRID(table), label, 0, O_LAST + 2, 1, 1);
  gtk_widget_set_halign(label, GTK_ALIGN_START);
  gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
 
  pdialog->growth_button = gtk_check_button_new();
  gtk_widget_set_halign(pdialog->growth_button, GTK_ALIGN_END);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(pdialog->growth_button),
                               FALSE);
  gtk_grid_attach(GTK_GRID(table), pdialog->growth_button, 1, O_LAST + 2, 1, 1);
 
  g_signal_connect(pdialog->growth_button, "toggled",
                   G_CALLBACK(hscale_changed), pdialog);
 
  /* Buttons */
  hbox = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
  gtk_button_box_set_layout(GTK_BUTTON_BOX(hbox), GTK_BUTTONBOX_EDGE);
  gtk_container_add(GTK_CONTAINER(vbox), hbox);
 
  button = gtk_button_new_from_stock(GTK_STOCK_HELP);
  g_signal_connect(button, "clicked",
                   G_CALLBACK(help_callback), NULL);
  gtk_container_add(GTK_CONTAINER(hbox), button);
  gtk_button_box_set_child_non_homogeneous(GTK_BUTTON_BOX(hbox),
                                           button, TRUE);
 
  pdialog->active_command = gtk_toggle_button_new();
  gtk_button_set_use_underline(GTK_BUTTON(pdialog->active_command), TRUE);
  gtk_button_set_image_position(GTK_BUTTON(pdialog->active_command),
                                GTK_POS_TOP);
  gtk_widget_set_name(pdialog->active_command, "comment_label");
  gtk_container_add(GTK_CONTAINER(hbox), pdialog->active_command);
 
  gtk_widget_show_all(pdialog->shell);
 
  dialog_list_prepend(dialog_list, pdialog);
 
  update_cma_preset_list(pdialog);
 
  gtk_tree_view_focus(GTK_TREE_VIEW(view));
 
  /* refresh is done in refresh_city_dialog */
 
  return pdialog;
}
 
/**********************************************************************/
void refresh_cma_dialog(struct city *pcity, enum cma_refresh refresh)
{
  struct cm_result *result = cm_result_new(pcity);
  struct cm_parameter param;
  struct cma_dialog *pdialog = get_cma_dialog(pcity);
  int controlled = cma_is_city_under_agent(pcity, NULL);
 
  cmafec_get_fe_parameter(pcity, &param);
 
  if (pdialog->result_label != NULL) {
    /* fill in result label */
    cm_result_from_main_map(result, pcity);
    gtk_label_set_text(GTK_LABEL(pdialog->result_label),
                       cmafec_get_result_descr(pcity, result, &param));
  }
 
  /* if called from a hscale, we _don't_ want to do this */
  if (refresh != DONT_REFRESH_HSCALES) {
    set_hscales(&param, pdialog);
  }
 
  gtk_widget_queue_draw(pdialog->preset_list);
 
  gtk_widget_set_sensitive(pdialog->active_command, can_client_issue_orders());
 
  g_signal_handlers_disconnect_matched(pdialog->active_command,
      G_SIGNAL_MATCH_FUNC,
      0, 0, NULL, cma_active_callback, NULL);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(pdialog->active_command),
      controlled);
  g_signal_connect(pdialog->active_command, "clicked",
      G_CALLBACK(cma_active_callback), pdialog);
 
  if (controlled) {
    GtkWidget *image = gtk_image_new_from_stock(
        GTK_STOCK_YES, GTK_ICON_SIZE_DND);
 
    gtk_button_set_image(GTK_BUTTON(pdialog->active_command), image);
    gtk_button_set_label(GTK_BUTTON(pdialog->active_command),
                         _("Governor Enabl_ed"));
  } else {
    GtkWidget *image = gtk_image_new_from_stock(
        GTK_STOCK_NO, GTK_ICON_SIZE_DND);
 
    gtk_button_set_image(GTK_BUTTON(pdialog->active_command), image);
    gtk_button_set_label(GTK_BUTTON(pdialog->active_command),
                         _("Governor Disabl_ed"));
  }
  gtk_button_set_always_show_image(GTK_BUTTON(pdialog->active_command), TRUE);
 
  if (pdialog->result_label != NULL) {
    gtk_widget_set_sensitive(pdialog->result_label, controlled);
  }
 
  cm_result_destroy(result);
}
 
/**********************************************************************/
static void update_cma_preset_list(struct cma_dialog *pdialog)
{
  char buf[BUFFER_SIZE];
  GtkTreeIter it;
  int i;
 
  /* Fill preset list */
  gtk_list_store_clear(pdialog->store);
 
  /* Append the presets */
  if (cmafec_preset_num()) {
    for (i = 0; i < cmafec_preset_num(); i++) {
      fc_strlcpy(buf, cmafec_preset_get_descr(i), sizeof(buf));
      gtk_list_store_append(pdialog->store, &it);
      gtk_list_store_set(pdialog->store, &it, 0, buf, -1);
    }
  }
}
 
/**********************************************************************/
static void cma_activate_preset_callback(GtkTreeView *view, GtkTreePath *path,
                                         GtkTreeViewColumn *col, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  int preset_index;
  const struct cm_parameter *pparam;
 
  preset_index = gtk_tree_path_get_indices(path) [0];
 
  pparam = cmafec_preset_get_parameter(preset_index);
 
  /* Save the change */
  cmafec_set_fe_parameter(pdialog->pcity, pparam);
 
  if (cma_is_city_under_agent(pdialog->pcity, NULL)) {
    cma_release_city(pdialog->pcity);
    cma_put_city_under_agent(pdialog->pcity, pparam);
  }
  refresh_city_dialog(pdialog->pcity);
}
 
/**********************************************************************/
static void cma_add_preset_callback(GtkWidget *w, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  const char *default_name;
  GtkWidget *parent = gtk_widget_get_toplevel(pdialog->shell);
  int index;
 
  if ((index = gtk_tree_selection_get_row(pdialog->selection)) != -1) {
    default_name = cmafec_preset_get_descr(index);
  } else {
    default_name = _("new preset");
  }
 
  pdialog->name_shell = input_dialog_create(GTK_WINDOW(parent),
                                    _("Name new preset"),
                                    _("What should we name the preset?"),
                                    default_name,
                                    cma_preset_add_popup_callback, pdialog);
}
 
/**********************************************************************/
static void cma_preset_add_popup_callback(gpointer data, gint response,
                                          const char *input)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
 
  if (pdialog) {
    if (response == GTK_RESPONSE_OK) {
      struct cm_parameter param;
 
      cmafec_get_fe_parameter(pdialog->pcity, &param);
      cmafec_preset_add(input, &param);
      update_cma_preset_list(pdialog);
      refresh_cma_dialog(pdialog->pcity, DONT_REFRESH_HSCALES);
      /* If this or other cities have this set as "custom" */
      city_report_dialog_update();
    } /* else CANCEL or DELETE_EVENT */
 
    pdialog->name_shell = NULL;
  }
}
 
/**********************************************************************/
static gboolean cma_preset_key_pressed_callback(GtkWidget *w, GdkEventKey *ev,
                                                gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  int index;
 
  if ((index = gtk_tree_selection_get_row(pdialog->selection)) == -1) {
    return FALSE;
  }
 
  if (ev->type == GDK_KEY_PRESS) {
    switch (ev->keyval) {
    case GDK_KEY_Delete:
      cma_preset_remove(pdialog, index);
      break;
    case GDK_KEY_Insert:
      cma_add_preset_callback(NULL, pdialog);
      break;
    default:
      return FALSE;
    }
    return TRUE;
  }
  return FALSE;
}
 
/**********************************************************************/
static void cma_del_preset_callback(GtkWidget *w, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  int index;
 
  if ((index = gtk_tree_selection_get_row(pdialog->selection)) == -1) {
    return;
  }
 
  cma_preset_remove(pdialog, index);
}
 
/**********************************************************************/
static void cma_preset_remove(struct cma_dialog *pdialog, int preset_index)
{
  GtkWidget *parent = gtk_widget_get_toplevel(pdialog->shell), *shl;
 
  pdialog->id = preset_index;
  shl = gtk_message_dialog_new(NULL,
                               GTK_DIALOG_DESTROY_WITH_PARENT,
                               GTK_MESSAGE_QUESTION,
                               GTK_BUTTONS_YES_NO,
                               _("Remove this preset?"));
  setup_dialog(shl, parent);
  pdialog->preset_remove_shell = shl;
 
  gtk_window_set_title(GTK_WINDOW(shl), cmafec_preset_get_descr(preset_index));
  gtk_window_set_position(GTK_WINDOW(shl), GTK_WIN_POS_CENTER_ON_PARENT);
 
  g_signal_connect(shl, "response",
                   G_CALLBACK(cma_preset_remove_response), pdialog);
 
  gtk_window_present(GTK_WINDOW(shl));
}
 
/**********************************************************************/
static void cma_preset_remove_response(GtkWidget *w, gint response,
                                       gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
 
  if (response == GTK_RESPONSE_YES) {
    cmafec_preset_remove(pdialog->id);
    pdialog->id = -1;
    update_cma_preset_list(pdialog);
    refresh_cma_dialog(pdialog->pcity, DONT_REFRESH_HSCALES);
    /* if this or other cities have this set, reset to "custom" */
    city_report_dialog_update();
  }
  gtk_widget_destroy(w);
  
  pdialog->preset_remove_shell = NULL;
}
 
/**********************************************************************/
static void cma_active_callback(GtkWidget *w, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
 
  if (cma_is_city_under_agent(pdialog->pcity, NULL)) {
    cma_release_city(pdialog->pcity);
  } else {
    struct cm_parameter param;
 
    cmafec_get_fe_parameter(pdialog->pcity, &param);
    cma_put_city_under_agent(pdialog->pcity, &param);
  }
  refresh_city_dialog(pdialog->pcity);
}
 
/**********************************************************************/
static void set_hscales(const struct cm_parameter *const parameter,
                        struct cma_dialog *pdialog)
{
  allow_refreshes = 0;
  output_type_iterate(i) {
    gtk_range_set_value(GTK_RANGE(pdialog->minimal_surplus[i]),
                        parameter->minimal_surplus[i]);
    gtk_range_set_value(GTK_RANGE(pdialog->factor[i]), parameter->factor[i]);
  } output_type_iterate_end;
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(pdialog->happy_button),
                               parameter->require_happy);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(pdialog->growth_button),
                               parameter->max_growth);
  gtk_range_set_value(GTK_RANGE(pdialog->factor[O_LAST]),
                      parameter->happy_factor);
  allow_refreshes = 1;
}
 
/**********************************************************************/
static void hscale_changed(GtkWidget *get, gpointer data)
{
  struct cma_dialog *pdialog = (struct cma_dialog *) data;
  struct cm_parameter param;
 
  if (!allow_refreshes) {
    return;
  }
 
  cmafec_get_fe_parameter(pdialog->pcity, &param);
  output_type_iterate(i) {
    param.minimal_surplus[i] =
        (int) (gtk_range_get_value(GTK_RANGE(pdialog->minimal_surplus[i])));
    param.factor[i] =
        (int) (gtk_range_get_value(GTK_RANGE(pdialog->factor[i])));
  } output_type_iterate_end;
  param.require_happy =
      (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(pdialog->happy_button))
       ? TRUE : FALSE);
  param.max_growth =
      (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(pdialog->growth_button))
       ? TRUE : FALSE);
  param.happy_factor =
      (int) (gtk_range_get_value(GTK_RANGE(pdialog->factor[O_LAST])));
 
  /* Save the change */
  cmafec_set_fe_parameter(pdialog->pcity, &param);
 
  /* Refreshes the cma */
  if (cma_is_city_under_agent(pdialog->pcity, NULL)) {
    cma_release_city(pdialog->pcity);
    cma_put_city_under_agent(pdialog->pcity, &param);
    refresh_city_dialog(pdialog->pcity);
  } else {
    refresh_cma_dialog(pdialog->pcity, DONT_REFRESH_HSCALES);
  }
}