gui_stuff.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
 
/* utility */
#include "fcintl.h"
#include "log.h"
#include "mem.h"
#include "support.h"
 
/* client */
#include "options.h"
 
/* client/gui-gtk-4.0 */
#include "colors.h"
#include "gui_main.h"
 
#include "gui_stuff.h"
 
 
static GList *dialog_list;
 
static GtkSizeGroup *gui_action;
 
static GtkCssProvider *dlg_tab_provider = NULL;
 
 
/**********************************************************************/
void gtk_expose_now(GtkWidget *w)
{
  gtk_widget_queue_draw(w);
}
 
/**********************************************************************/
GtkWidget *icon_label_button_new(const gchar *icon_name,
                                 const gchar *label_text)
{
  GtkWidget *button;
 
  fc_assert(icon_name != NULL || label_text != NULL);
 
  if (label_text != NULL) {
    button = gtk_button_new_with_mnemonic(label_text);
  } else if (icon_name != NULL) {
    button = gtk_button_new_from_icon_name(icon_name);
  } else {
    button = NULL;
  }
 
  return button;
}
 
/**********************************************************************/
void gtk_stockbutton_set_label(GtkWidget *button, const gchar *label_text)
{
  gtk_button_set_label(GTK_BUTTON(button), label_text);
}
 
/**********************************************************************/
void intl_slist(int n, const char **s, bool *done)
{
  int i;
 
  if (!*done) {
    for (i = 0; i < n; i++) {
      s[i] = Q_(s[i]);
    }
 
    *done = TRUE;
  }
}
 
/**********************************************************************/
void itree_begin(GtkTreeModel *model, ITree *it)
{
  it->model = model;
  it->end = !gtk_tree_model_get_iter_first(it->model, &it->it);
}
 
/**********************************************************************/
gboolean itree_end(ITree *it)
{
  return it->end;
}
 
/**********************************************************************/
void itree_next(ITree *it)
{
  it->end = !gtk_tree_model_iter_next(it->model, &it->it);
}
 
/**********************************************************************/
void itree_set(ITree *it, ...)
{
  va_list ap;
 
  va_start(ap, it);
  gtk_tree_store_set_valist(GTK_TREE_STORE(it->model), &it->it, ap);
  va_end(ap);
}
 
/**********************************************************************/
void itree_get(ITree *it, ...)
{
  va_list ap;
 
  va_start(ap, it);
  gtk_tree_model_get_valist(it->model, &it->it, ap);
  va_end(ap);
}
 
/**********************************************************************/
void tstore_append(GtkTreeStore *store, ITree *it, ITree *parent)
{
  it->model = GTK_TREE_MODEL(store);
  if (parent)
    gtk_tree_store_append(GTK_TREE_STORE(it->model), &it->it, &parent->it);
  else
    gtk_tree_store_append(GTK_TREE_STORE(it->model), &it->it, NULL);
  it->end = FALSE;
}
 
/**********************************************************************/
gboolean itree_is_selected(GtkTreeSelection *selection, ITree *it)
{
  return gtk_tree_selection_iter_is_selected(selection, &it->it);
}
 
/**********************************************************************/
void itree_select(GtkTreeSelection *selection, ITree *it)
{
  gtk_tree_selection_select_iter(selection, &it->it);
}
 
/**********************************************************************/
void itree_unselect(GtkTreeSelection *selection, ITree *it)
{
  gtk_tree_selection_unselect_iter(selection, &it->it);
}
 
/**********************************************************************/
gint gtk_tree_selection_get_row(GtkTreeSelection *selection)
{
  GtkTreeModel *model;
  GtkTreeIter it;
  gint row = -1;
 
  if (gtk_tree_selection_get_selected(selection, &model, &it)) {
    GtkTreePath *path;
    gint *idx;
 
    path = gtk_tree_model_get_path(model, &it);
    idx = gtk_tree_path_get_indices(path);
    row = idx[0];
    gtk_tree_path_free(path);
  }
 
  return row;
}
 
/**********************************************************************/
void gtk_tree_view_focus(GtkTreeView *view)
{
  GtkTreeModel *model;
  GtkTreePath *path;
  GtkTreeIter iter;
 
  if ((model = gtk_tree_view_get_model(view))
      && gtk_tree_model_get_iter_first(model, &iter)
      && (path = gtk_tree_model_get_path(model, &iter))) {
    gtk_tree_view_set_cursor(view, path, NULL, FALSE);
    gtk_tree_path_free(path);
    gtk_widget_grab_focus(GTK_WIDGET(view));
  }
}
 
/**********************************************************************/
GtkWidget *aux_menu_new(void)
{
  GtkWidget *menu_button = gtk_menu_button_new();
 
  return menu_button;
}
 
/**********************************************************************/
static void close_callback(GtkDialog *dialog, gpointer data)
{
  gtk_window_destroy(GTK_WINDOW(dialog));
}
 
/**********************************************************************/
void setup_dialog(GtkWidget *shell, GtkWidget *parent)
{
  if (GUI_GTK_OPTION(dialogs_on_top) || GUI_GTK_OPTION(fullscreen)) {
    gtk_window_set_transient_for(GTK_WINDOW(shell),
                                 GTK_WINDOW(parent));
  }
 
  /* Close dialog window on Escape keypress. */
  if (GTK_IS_DIALOG(shell)) {
    GtkEventController *controller;
 
    controller = GTK_EVENT_CONTROLLER(gtk_event_controller_focus_new());
    g_signal_connect(controller, "enter",
                     G_CALLBACK(fc_gained_focus), NULL);
    g_signal_connect(controller, "leave",
                     G_CALLBACK(fc_lost_focus), NULL);
    gtk_widget_add_controller(shell, controller);
 
    g_signal_connect_after(shell, "close", G_CALLBACK(close_callback), shell);
  }
}
 
/**********************************************************************/
static void gui_dialog_response(struct gui_dialog *dlg, int response)
{
  if (dlg->response_callback) {
    (*dlg->response_callback)(dlg, response, dlg->user_data);
  }
}
 
/**********************************************************************/
static void gui_dialog_destroyed(struct gui_dialog *dlg, int response,
                                 gpointer data)
{
  gui_dialog_destroy(dlg);
}
 
/**********************************************************************/
static void gui_dialog_destroy_handler(GtkWidget *w, struct gui_dialog *dlg)
{
  if (dlg->type == GUI_DIALOG_TAB) {
    GtkWidget *notebook = dlg->v.tab.notebook;
    gulong handler_id = dlg->v.tab.handler_id;
 
    g_signal_handler_disconnect(notebook, handler_id);
  }
 
  g_object_unref(dlg->gui_button);
 
  if (*(dlg->source)) {
    *(dlg->source) = NULL;
  }
 
  dialog_list = g_list_remove(dialog_list, dlg);
 
  /* Raise the return dialog set by gui_dialog_set_return_dialog() */
  if (dlg->return_dialog_id != -1) {
    GList *it;
 
    for (it = dialog_list; it; it = g_list_next(it)) {
      struct gui_dialog *adialog = (struct gui_dialog *)it->data;
 
      if (adialog->id == dlg->return_dialog_id) {
        gui_dialog_raise(adialog);
        break;
      }
    }
  }
 
  if (dlg->title) {
    free(dlg->title);
  }
 
  free(dlg);
}
 
/**********************************************************************/
static gint gui_dialog_delete_handler(GtkWidget *widget, gpointer data)
{
  struct gui_dialog *dlg = data;
 
  /* emit response signal. */
  gui_dialog_response(dlg, GTK_RESPONSE_DELETE_EVENT);
 
  /* do the destroy by default. */
  return FALSE;
}
 
/**********************************************************************/
static gint gui_dialog_delete_tab_handler(struct gui_dialog* dlg)
{
  GtkWidget* notebook;
  int n;
 
  notebook = dlg->v.tab.notebook;
  n = gtk_notebook_get_current_page(GTK_NOTEBOOK(notebook));
  if (gtk_notebook_get_nth_page(GTK_NOTEBOOK(notebook), n)
      != dlg->v.tab.child) {
    gui_dialog_set_return_dialog(dlg, NULL);
  }
 
  /* Emit response signal. */
  gui_dialog_response(dlg, GTK_RESPONSE_DELETE_EVENT);
 
  /* Do the destroy by default. */
  return FALSE;
}
 
 
/**********************************************************************/
static gboolean gui_dialog_key_press_handler(GtkEventControllerKey *controller,
                                             guint keyval, guint keycode,
                                             GdkModifierType state,
                                             gpointer data)
{
  struct gui_dialog *dlg = (struct gui_dialog *)data;
 
  if (keyval == GDK_KEY_Escape
      || ((state & GDK_CONTROL_MASK) && keyval == GDK_KEY_w)) {
    /* Emit response signal. */
    gui_dialog_response(dlg, GTK_RESPONSE_DELETE_EVENT);
  }
 
  /* Propagate event further. */
  return FALSE;
}
 
/**********************************************************************/
static void gui_dialog_switch_page_handler(GtkNotebook *notebook,
                                           GtkWidget *page,
                                           guint num,
                                           struct gui_dialog *dlg)
{
  gint n;
 
  n = gtk_notebook_page_num(GTK_NOTEBOOK(dlg->v.tab.notebook), dlg->grid);
 
  if (n == num) {
    gtk_widget_remove_css_class(dlg->v.tab.label, "alert");
    gtk_widget_remove_css_class(dlg->v.tab.label, "notice");
  }
}
 
/**********************************************************************/
static void gui_dialog_detach(struct gui_dialog *dlg)
{
  gint n;
  GtkWidget *window, *notebook;
  gulong handler_id;
 
  if (dlg->type != GUI_DIALOG_TAB) {
    return;
  }
  dlg->type = GUI_DIALOG_WINDOW;
 
  /* Create a new reference to the main widget, so it won't be
   * destroyed in gtk_notebook_remove_page() */
  g_object_ref(dlg->grid);
 
  /* Remove widget from the notebook */
  notebook = dlg->v.tab.notebook;
  handler_id = dlg->v.tab.handler_id;
  g_signal_handler_disconnect(notebook, handler_id);
 
  n = gtk_notebook_page_num(GTK_NOTEBOOK(dlg->v.tab.notebook), dlg->grid);
  gtk_notebook_remove_page(GTK_NOTEBOOK(dlg->v.tab.notebook), n);
 
 
  /* Create window and put the widget inside */
  window = gtk_window_new();
  gtk_window_set_title(GTK_WINDOW(window), dlg->title);
  setup_dialog(window, toplevel);
 
  gtk_window_set_child(GTK_WINDOW(window), dlg->grid);
  dlg->v.window = window;
  g_signal_connect(window, "close-request",
                   G_CALLBACK(gui_dialog_delete_handler), dlg);
 
  gtk_window_set_default_size(GTK_WINDOW(dlg->v.window),
                              dlg->default_width,
                              dlg->default_height);
  gtk_widget_set_visible(window, TRUE);
}
 
/**********************************************************************/
static gboolean click_on_tab_callback(GtkGestureClick *gesture,
                                      int n_press,
                                      double x, double y, gpointer data)
{
  if (n_press == 2) {
    gui_dialog_detach((struct gui_dialog *)data);
  }
 
  return TRUE;
}
 
/**********************************************************************/
void gui_dialog_new(struct gui_dialog **pdlg, GtkNotebook *notebook,
                    gpointer user_data, bool check_top)
{
  struct gui_dialog *dlg;
  GtkWidget *action_area;
  static int dialog_id_counter;
  GtkEventController *controller;
 
  dlg = fc_malloc(sizeof(*dlg));
  dialog_list = g_list_prepend(dialog_list, dlg);
 
  dlg->source = pdlg;
  *pdlg = dlg;
  dlg->user_data = user_data;
  dlg->title = NULL;
 
  dlg->default_width = 200;
  dlg->default_height = 300;
 
  if (GUI_GTK_OPTION(enable_tabs)) {
    dlg->type = GUI_DIALOG_TAB;
  } else {
    dlg->type = GUI_DIALOG_WINDOW;
  }
 
  if (!gui_action) {
    gui_action = gtk_size_group_new(GTK_SIZE_GROUP_VERTICAL);
  }
  dlg->gui_button = gtk_size_group_new(GTK_SIZE_GROUP_BOTH);
 
  dlg->grid = gtk_grid_new();
  dlg->content_counter = 0;
  if (GUI_GTK_OPTION(enable_tabs)
      && (check_top && notebook != GTK_NOTEBOOK(top_notebook))
      && !GUI_GTK_OPTION(small_display_layout)) {
    /* We expect this to be short (as opposed to tall); maximise usable
     * height by putting buttons down the right hand side */
    action_area = gtk_box_new(GTK_ORIENTATION_VERTICAL, 4);
    dlg->vertical_content = FALSE;
  } else {
    /* We expect this to be reasonably tall; maximise usable width by
     * putting buttons along the bottom */
    action_area = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
    gtk_orientable_set_orientation(GTK_ORIENTABLE(dlg->grid),
                                   GTK_ORIENTATION_VERTICAL);
    dlg->vertical_content = TRUE;
  }
 
  gtk_widget_set_visible(dlg->grid, TRUE);
  gui_dialog_add_content_widget(dlg, action_area);
  gtk_widget_set_visible(action_area, TRUE);
 
  gtk_widget_set_margin_start(dlg->grid, 2);
  gtk_widget_set_margin_end(dlg->grid, 2);
  gtk_widget_set_margin_top(dlg->grid, 2);
  gtk_widget_set_margin_bottom(dlg->grid, 2);
 
  gtk_widget_set_margin_start(action_area, 2);
  gtk_widget_set_margin_end(action_area, 2);
  gtk_widget_set_margin_top(action_area, 2);
  gtk_widget_set_margin_bottom(action_area, 2);
 
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    {
      GtkWidget *window;
 
      window = gtk_window_new();
      gtk_widget_set_name(window, "Freeciv");
      setup_dialog(window, toplevel);
 
      gtk_window_set_child(GTK_WINDOW(window), dlg->grid);
      dlg->v.window = window;
      g_signal_connect(window, "close-request",
        G_CALLBACK(gui_dialog_delete_handler), dlg);
 
    }
    break;
  case GUI_DIALOG_TAB:
    {
      GtkWidget *hbox, *label, *button;
      gchar *buf;
 
      hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
 
      label = gtk_label_new(NULL);
      gtk_widget_set_halign(label, GTK_ALIGN_START);
      gtk_widget_set_valign(label, GTK_ALIGN_CENTER);
      gtk_widget_set_margin_start(label, 4);
      gtk_widget_set_margin_end(label, 4);
      gtk_widget_set_margin_top(label, 0);
      gtk_widget_set_margin_bottom(label, 0);
      gtk_box_append(GTK_BOX(hbox), label);
 
      button = gtk_button_new();
      gtk_button_set_has_frame(GTK_BUTTON(button), FALSE);
      g_signal_connect_swapped(button, "clicked",
                               G_CALLBACK(gui_dialog_delete_tab_handler), dlg);
 
      buf = g_strdup_printf(_("Close Tab:\n%s"), _("Ctrl+W"));
      gtk_widget_set_tooltip_text(button, buf);
      g_free(buf);
 
      gtk_button_set_icon_name(GTK_BUTTON(button), "window-close");
 
      gtk_box_append(GTK_BOX(hbox), button);
 
      gtk_widget_set_visible(hbox, TRUE);
 
      gtk_notebook_append_page(GTK_NOTEBOOK(notebook), dlg->grid, hbox);
      dlg->v.tab.handler_id
        = g_signal_connect(notebook, "switch-page",
                           G_CALLBACK(gui_dialog_switch_page_handler), dlg);
      dlg->v.tab.child = dlg->grid;
 
      dlg->v.tab.label = label;
      dlg->v.tab.notebook = GTK_WIDGET(notebook);
 
      controller = GTK_EVENT_CONTROLLER(gtk_gesture_click_new());
      g_signal_connect(controller, "pressed",
                       G_CALLBACK(click_on_tab_callback), dlg);
      gtk_widget_add_controller(hbox, controller);
    }
    break;
  }
 
  dlg->actions = action_area;
 
  dlg->response_callback = gui_dialog_destroyed;
 
  dlg->id = dialog_id_counter;
  dialog_id_counter++;
  dlg->return_dialog_id = -1;
 
  g_signal_connect(dlg->grid, "destroy",
                   G_CALLBACK(gui_dialog_destroy_handler), dlg);
  controller = gtk_event_controller_key_new();
  g_signal_connect(controller, "key-pressed",
                   G_CALLBACK(gui_dialog_key_press_handler), dlg);
  gtk_widget_add_controller(dlg->grid, controller);
 
  g_object_set_data(G_OBJECT(dlg->grid), "gui-dialog-data", dlg);
}
 
/**********************************************************************/
static void action_widget_activated(GtkWidget *button, GtkWidget *vbox)
{
  struct gui_dialog *dlg =
    g_object_get_data(G_OBJECT(vbox), "gui-dialog-data");
  gpointer arg2 =
    g_object_get_data(G_OBJECT(button), "gui-dialog-response-data");
 
  gui_dialog_response(dlg, GPOINTER_TO_INT(arg2));
}
 
/**********************************************************************/
static void gui_dialog_pack_button(struct gui_dialog *dlg, GtkWidget *button,
                                   int response)
{
  gint signal_id;
 
  fc_assert_ret(GTK_IS_BUTTON(button));
 
  g_object_set_data(G_OBJECT(button), "gui-dialog-response-data",
      GINT_TO_POINTER(response));
 
  if ((signal_id = g_signal_lookup("clicked", GTK_TYPE_BUTTON))) {
    GClosure *closure;
 
    closure = g_cclosure_new_object(G_CALLBACK(action_widget_activated),
                                    G_OBJECT(dlg->grid));
    g_signal_connect_closure_by_id(button, signal_id, 0, closure, FALSE);
  }
 
  gui_dialog_add_action_widget(dlg, button);
  gtk_size_group_add_widget(dlg->gui_button, button);
}
 
/**********************************************************************/
GtkWidget *gui_dialog_add_button(struct gui_dialog *dlg,
                                 const char *icon_name,
                                 const char *text, int response)
{
  GtkWidget *button;
 
  button = icon_label_button_new(icon_name, text);
  gui_dialog_pack_button(dlg, button, response);
 
  return button;
}
 
/**********************************************************************/
GtkWidget *gui_dialog_add_action_widget(struct gui_dialog *dlg,
                                        GtkWidget *widget)
{
  gtk_box_append(GTK_BOX(dlg->actions), widget);
 
  gtk_size_group_add_widget(gui_action, widget);
 
  return widget;
}
 
/**********************************************************************/
void gui_dialog_set_response_sensitive(struct gui_dialog *dlg,
                                       int response, bool setting)
{
  GtkWidget *iter;
 
  for (iter = gtk_widget_get_first_child(dlg->actions);
       iter != NULL;
       iter = gtk_widget_get_next_sibling(iter)) {
    if (GTK_IS_BUTTON(iter)) {
      gpointer data = g_object_get_data(G_OBJECT(iter),
                                        "gui-dialog-response-data");
 
      if (response == GPOINTER_TO_INT(data)) {
        gtk_widget_set_sensitive(iter, setting);
      }
    }
  }
}
 
/**********************************************************************/
GtkWidget *gui_dialog_get_toplevel(struct gui_dialog *dlg)
{
  return gtk_widget_get_ancestor(dlg->grid, GTK_TYPE_WINDOW);
}
 
/**********************************************************************/
void gui_dialog_show_all(struct gui_dialog *dlg)
{
  gtk_widget_set_visible(dlg->grid, TRUE);
 
  if (dlg->type == GUI_DIALOG_TAB) {
    GtkWidget *iter;
    gint num_visible = 0;
 
    for (iter = gtk_widget_get_first_child(dlg->actions);
         iter != NULL;
         iter = gtk_widget_get_next_sibling(iter)) {
      if (!GTK_IS_BUTTON(iter)) {
        num_visible++;
      } else {
        gpointer data = g_object_get_data(G_OBJECT(iter),
                                          "gui-dialog-response-data");
        int response = GPOINTER_TO_INT(data);
 
        if (response != GTK_RESPONSE_CLOSE
            && response != GTK_RESPONSE_CANCEL) {
          num_visible++;
        } else {
          gtk_widget_set_visible(iter, FALSE);
        }
      }
    }
 
    if (num_visible == 0) {
      gtk_widget_set_visible(dlg->actions, FALSE);
    }
  }
}
 
/**********************************************************************/
void gui_dialog_present(struct gui_dialog *dlg)
{
  fc_assert_ret(nullptr != dlg);
 
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    gtk_widget_set_visible(dlg->v.window, TRUE);
    break;
  case GUI_DIALOG_TAB:
    {
      GtkNotebook *notebook = GTK_NOTEBOOK(dlg->v.tab.notebook);
      gint current, n;
 
      current = gtk_notebook_get_current_page(notebook);
      n = gtk_notebook_page_num(notebook, dlg->grid);
 
      if (current != n) {
        gtk_widget_add_css_class(dlg->v.tab.label, "notice");
      }
    }
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_raise(struct gui_dialog *dlg)
{
  fc_assert_ret(NULL != dlg);
 
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    gtk_window_present(GTK_WINDOW(dlg->v.window));
    break;
  case GUI_DIALOG_TAB:
    {
      GtkNotebook *notebook = GTK_NOTEBOOK(dlg->v.tab.notebook);
      gint n;
 
      n = gtk_notebook_page_num(notebook, dlg->grid);
      gtk_notebook_set_current_page(notebook, n);
    }
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_alert(struct gui_dialog *dlg)
{
  fc_assert_ret(NULL != dlg);
 
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    break;
  case GUI_DIALOG_TAB:
    {
      GtkNotebook *notebook = GTK_NOTEBOOK(dlg->v.tab.notebook);
      gint current, n;
 
      current = gtk_notebook_get_current_page(notebook);
      n = gtk_notebook_page_num(notebook, dlg->grid);
 
      if (current != n) {
        /* Have only alert - remove notice if it exist. */
        gtk_widget_remove_css_class(dlg->v.tab.label, "notice");
        gtk_widget_add_css_class(dlg->v.tab.label, "alert");
      }
    }
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_set_default_size(struct gui_dialog *dlg, int width, int height)
{
  dlg->default_width = width;
  dlg->default_height = height;
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    gtk_window_set_default_size(GTK_WINDOW(dlg->v.window), width, height);
    break;
  case GUI_DIALOG_TAB:
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_set_title(struct gui_dialog *dlg, const char *title)
{
  if (dlg->title) {
    free(dlg->title);
  }
  dlg->title = fc_strdup(title);
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    gtk_window_set_title(GTK_WINDOW(dlg->v.window), title);
    break;
  case GUI_DIALOG_TAB:
    gtk_label_set_text_with_mnemonic(GTK_LABEL(dlg->v.tab.label), title);
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_destroy(struct gui_dialog *dlg)
{
  switch (dlg->type) {
  case GUI_DIALOG_WINDOW:
    gtk_window_destroy(GTK_WINDOW(dlg->v.window));
    break;
  case GUI_DIALOG_TAB:
    {
      gint n;
 
      n = gtk_notebook_page_num(GTK_NOTEBOOK(dlg->v.tab.notebook), dlg->grid);
      gtk_notebook_remove_page(GTK_NOTEBOOK(dlg->v.tab.notebook), n);
    }
    break;
  }
}
 
/**********************************************************************/
void gui_dialog_destroy_all(void)
{
  GList *it, *it_next;
 
  for (it = dialog_list; it; it = it_next) {
    it_next = g_list_next(it);
 
    gui_dialog_destroy((struct gui_dialog *)it->data);
  }
}
 
/**********************************************************************/
void gui_dialog_response_set_callback(struct gui_dialog *dlg,
    GUI_DIALOG_RESPONSE_FUN fun)
{
  dlg->response_callback = fun;
}
 
/**********************************************************************/
void gui_dialog_set_return_dialog(struct gui_dialog *dlg,
                                  struct gui_dialog *return_dialog)
{
  if (return_dialog == NULL) {
    dlg->return_dialog_id = -1;
  } else {
    dlg->return_dialog_id = return_dialog->id;
  }
}
 
/**********************************************************************/
void gui_update_font(const char *font_name, const char *font_value)
{
  char *str;
  GtkCssProvider *provider;
  PangoFontDescription *desc;
  int size;
  const char *fam;
  const char *style;
  const char *weight;
 
  desc = pango_font_description_from_string(font_value);
 
  if (desc == NULL) {
    return;
  }
 
  fam = pango_font_description_get_family(desc);
 
  if (fam == NULL) {
    return;
  }
 
  if (pango_font_description_get_style(desc) == PANGO_STYLE_ITALIC) {
    style = "\n font-style: italic;";
  } else {
    style = "";
  }
 
  if (pango_font_description_get_weight(desc) >= 700) {
    weight = "\n font-weight: bold;";
  } else {
    weight = "";
  }
 
  size = pango_font_description_get_size(desc);
 
  if (size != 0) {
    if (pango_font_description_get_size_is_absolute(desc)) {
      str = g_strdup_printf("#Freeciv #%s { font-family: %s; font-size: %dpx;%s%s}",
                            font_name, fam, size / PANGO_SCALE, style, weight);
    } else {
      str = g_strdup_printf("#Freeciv #%s { font-family: %s; font-size: %dpt;%s%s}",
                            font_name, fam, size / PANGO_SCALE, style, weight);
    }
  } else {
    str = g_strdup_printf("#Freeciv #%s { font-family: %s;%s%s}",
                          font_name, fam, style, weight);
  }
 
  pango_font_description_free(desc);
 
  provider = gtk_css_provider_new();
  gtk_css_provider_load_from_data(GTK_CSS_PROVIDER(provider),
                                  str, -1);
  gtk_style_context_add_provider_for_display(
    gtk_widget_get_display(toplevel), GTK_STYLE_PROVIDER(provider),
    GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
  g_free(str);
}
 
/**********************************************************************/
void gui_update_font_full(const char *font_name, const char *font_value,
                          PangoFontDescription **font_desc)
{
  PangoFontDescription *f_desc;
 
  gui_update_font(font_name, font_value);
 
  f_desc = pango_font_description_from_string(font_value);
  pango_font_description_free(*font_desc);
 
  *font_desc = f_desc;
}
 
/**********************************************************************/
void disable_gobject_callback(GObject *obj, GCallback cb)
{
  gulong hid;
 
  if (!obj || !cb) {
    return;
  }
 
  hid = g_signal_handler_find(obj, G_SIGNAL_MATCH_FUNC,
                              0, 0, NULL, cb, NULL);
  g_signal_handler_block(obj, hid);
}
 
/**********************************************************************/
void enable_gobject_callback(GObject *obj, GCallback cb)
{
  gulong hid;
 
  if (!obj || !cb) {
    return;
  }
 
  hid = g_signal_handler_find(obj, G_SIGNAL_MATCH_FUNC,
                              0, 0, NULL, cb, NULL);
  g_signal_handler_unblock(obj, hid);
}
 
/**********************************************************************/
GtkTreeViewColumn *add_treeview_column(GtkWidget *view, const char *title,
                                       GType gtype, int model_index)
{
  GtkTreeViewColumn *col;
  GtkCellRenderer *rend;
  const char *attr;
 
  fc_assert_ret_val(view != NULL, NULL);
  fc_assert_ret_val(GTK_IS_TREE_VIEW(view), NULL);
  fc_assert_ret_val(title != NULL, NULL);
 
  if (gtype == G_TYPE_BOOLEAN) {
    rend = gtk_cell_renderer_toggle_new();
    attr = "active";
  } else if (gtype == GDK_TYPE_PIXBUF) {
    rend = gtk_cell_renderer_pixbuf_new();
    attr = "pixbuf";
  } else {
    rend = gtk_cell_renderer_text_new();
    attr = "text";
  }
 
  col = gtk_tree_view_column_new_with_attributes(title, rend, attr,
                                                 model_index, NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
 
  return col;
}
 
/**********************************************************************/
void dlg_tab_provider_prepare(void)
{
  dlg_tab_provider = gtk_css_provider_new();
 
  gtk_css_provider_load_from_data(dlg_tab_provider,
                                  ".alert {\n"
                                  "color: rgba(255, 0, 0, 255);\n"
                                  "}\n"
                                  ".notice {\n"
                                  "color: rgba(0, 0, 255, 255);\n"
                                  "}\n",
                                  -1);
 
  gtk_style_context_add_provider_for_display(
                                     gtk_widget_get_display(toplevel),
                                     GTK_STYLE_PROVIDER(dlg_tab_provider),
                                     GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
 
/**********************************************************************/
void gui_dialog_add_content_widget(struct gui_dialog *dlg, GtkWidget *wdg)
{
  if (dlg->vertical_content) {
    gtk_grid_attach(GTK_GRID(dlg->grid), wdg,
                    0, dlg->content_counter++, 1, 1);
  } else {
    gtk_grid_attach(GTK_GRID(dlg->grid), wdg,
                    dlg->content_counter++, 0, 1, 1);
  }
}
 
struct blocking_dialog_data {
  GMainLoop *loop;
  gint response;
};
 
/**********************************************************************/
static void blocking_dialog_response(GtkWidget *dlg, gint response, void *data)
{
  struct blocking_dialog_data *bd_data = (struct blocking_dialog_data *)data;
 
  bd_data->response = response;
 
  g_main_loop_quit(bd_data->loop);
}
 
/**********************************************************************/
gint blocking_dialog(GtkWidget *dlg)
{
  struct blocking_dialog_data data;
  GMainLoop *dlg_loop;
 
  gtk_widget_set_visible(dlg, TRUE);
  dlg_loop = g_main_loop_new(nullptr, FALSE);
  data.loop = dlg_loop;
  g_signal_connect(dlg, "response", G_CALLBACK(blocking_dialog_response),
                   &data);
 
  g_main_loop_run(dlg_loop);
 
  return data.response;
}
 
/**********************************************************************/
void widget_destroyed(GtkWidget *wdg, void *data)
{
  *(GtkWidget **)data = NULL;
}
 
/**********************************************************************/
GtkWidget *widget_get_child(GtkWidget *wdg)
{
  return gtk_widget_get_first_child(wdg);
}