gtk2/demos/gtk-demo/appwindow.c

/* Application window
 *
 * Demonstrates a typical application window with menubar, toolbar, statusbar.
 *
 * This example uses GtkUIManager and GtkActionGroup.
 */

#include <gtk/gtk.h>
#include "config.h"

static GtkWidget *window = NULL;
static GtkWidget *infobar = NULL;
static GtkWidget *messagelabel = NULL;

static void
activate_action (GtkAction *action)
{
  const gchar *name = gtk_action_get_name (action);
  const gchar *typename = G_OBJECT_TYPE_NAME (action);

  GtkWidget *dialog;

  if (g_str_equal (name, "DarkTheme"))
    {
      gboolean value = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action));
      GtkSettings *settings = gtk_settings_get_default ();

      g_object_set (G_OBJECT (settings),
                    "gtk-application-prefer-dark-theme", value,
                    NULL);
      return;
    }

  if (g_str_equal (name, "HideTitlebar"))
    {
      gboolean value = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action));
      gtk_window_set_hide_titlebar_when_maximized (GTK_WINDOW (window), value);
      return;
    }

  dialog = gtk_message_dialog_new (GTK_WINDOW (window),
                                   GTK_DIALOG_DESTROY_WITH_PARENT,
                                   GTK_MESSAGE_INFO,
                                   GTK_BUTTONS_CLOSE,
                                   "You activated action: \"%s\" of type \"%s\"",
                                    name, typename);

  /* Close dialog on user response */
  g_signal_connect (dialog,
                    "response",
                    G_CALLBACK (gtk_widget_destroy),
                    NULL);

  gtk_widget_show (dialog);
}

static void
activate_radio_action (GtkAction *action, GtkRadioAction *current)
{
  const gchar *name = gtk_action_get_name (GTK_ACTION (current));
  const gchar *typename = G_OBJECT_TYPE_NAME (GTK_ACTION (current));
  gboolean active = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (current));
  gint value = gtk_radio_action_get_current_value (GTK_RADIO_ACTION (current));

  if (active)
    {
      gchar *text;

      text = g_strdup_printf ("You activated radio action: \"%s\" of type \"%s\".\n"
                              "Current value: %d",
                              name, typename, value);
      gtk_label_set_text (GTK_LABEL (messagelabel), text);
      gtk_info_bar_set_message_type (GTK_INFO_BAR (infobar), (GtkMessageType)value);
      gtk_widget_show (infobar);
      g_free (text);
    }
}

static void
about_cb (GtkAction *action,
          GtkWidget *window)
{
  GdkPixbuf *pixbuf, *transparent;

  const gchar *authors[] = {
    "Peter Mattis",
    "Spencer Kimball",
    "Josh MacDonald",
    "and many more...",
    NULL
  };

  const gchar *documentors[] = {
    "Owen Taylor",
    "Tony Gale",
    "Matthias Clasen <mclasen@redhat.com>",
    "and many more...",
    NULL
  };

  pixbuf = gdk_pixbuf_new_from_resource ("/appwindow/gtk-logo-rgb.gif", NULL);
  /* We asser the existence of the pixbuf as we load it from a custom resource. */
  g_assert (pixbuf);
  transparent = gdk_pixbuf_add_alpha (pixbuf, TRUE, 0xff, 0xff, 0xff);
  g_object_unref (pixbuf);

  gtk_show_about_dialog (GTK_WINDOW (window),
                         "program-name", "GTK+ Code Demos",
                         "version", g_strdup_printf ("%s,\nRunning against GTK+ %d.%d.%d",
                                                     PACKAGE_VERSION,
                                                     gtk_get_major_version (),
                                                     gtk_get_minor_version (),
                                                     gtk_get_micro_version ()),
                         "copyright", "(C) 1997-2009 The GTK+ Team",
                         "license-type", GTK_LICENSE_LGPL_2_1,
                         "website", "http://www.gtk.org",
                         "comments", "Program to demonstrate GTK+ functions.",
                         "authors", authors,
                         "documenters", documentors,
                         "logo", transparent,
                         "title", "About GTK+ Code Demos",
                         NULL);

  g_object_unref (transparent);
}

typedef struct
{
  GtkAction action;
} ToolMenuAction;

typedef struct
{
  GtkActionClass parent_class;
} ToolMenuActionClass;

G_DEFINE_TYPE(ToolMenuAction, tool_menu_action, GTK_TYPE_ACTION)

static void
tool_menu_action_class_init (ToolMenuActionClass *class)
{
  GTK_ACTION_CLASS (class)->toolbar_item_type = GTK_TYPE_MENU_TOOL_BUTTON;
}

static void
tool_menu_action_init (ToolMenuAction *action)
{
}

static GtkActionEntry entries[] = {
  { "FileMenu", NULL, "_File" },               /* name, stock id, label */
  { "OpenMenu", NULL, "_Open" },               /* name, stock id, label */
  { "PreferencesMenu", NULL, "_Preferences" }, /* name, stock id, label */
  { "ColorMenu", NULL, "_Color"  },            /* name, stock id, label */
  { "ShapeMenu", NULL, "_Shape" },             /* name, stock id, label */
  { "HelpMenu", NULL, "_Help" },               /* name, stock id, label */
  { "New", GTK_STOCK_NEW,                      /* name, stock id */
    "_New", "<control>N",                      /* label, accelerator */
    "Create a new file",                       /* tooltip */
    G_CALLBACK (activate_action) },
  { "File1", NULL,                             /* name, stock id */
    "File1", NULL,                             /* label, accelerator */
    "Open first file",                         /* tooltip */
    G_CALLBACK (activate_action) },
  { "Save", GTK_STOCK_SAVE,                    /* name, stock id */
    "_Save","<control>S",                      /* label, accelerator */
    "Save current file",                       /* tooltip */
    G_CALLBACK (activate_action) },
  { "SaveAs", GTK_STOCK_SAVE,                  /* name, stock id */
    "Save _As...", NULL,                       /* label, accelerator */
    "Save to a file",                          /* tooltip */
    G_CALLBACK (activate_action) },
  { "Quit", GTK_STOCK_QUIT,                    /* name, stock id */
    "_Quit", "<control>Q",                     /* label, accelerator */
    "Quit",                                    /* tooltip */
    G_CALLBACK (activate_action) },
  { "About", NULL,                             /* name, stock id */
    "_About", "<control>A",                    /* label, accelerator */
    "About",                                   /* tooltip */
    G_CALLBACK (about_cb) },
  { "Logo", "demo-gtk-logo",                   /* name, stock id */
     NULL, NULL,                               /* label, accelerator */
    "GTK+",                                    /* tooltip */
    G_CALLBACK (activate_action) },
};
static guint n_entries = G_N_ELEMENTS (entries);


static GtkToggleActionEntry toggle_entries[] = {
  { "Bold", GTK_STOCK_BOLD,                    /* name, stock id */
     "_Bold", "<control>B",                    /* label, accelerator */
    "Bold",                                    /* tooltip */
    G_CALLBACK (activate_action),
    TRUE },                                    /* is_active */
  { "DarkTheme", NULL,                         /* name, stock id */
     "_Prefer Dark Theme", NULL,               /* label, accelerator */
    "Prefer Dark Theme",                       /* tooltip */
    G_CALLBACK (activate_action),
    FALSE },                                   /* is_active */
  { "HideTitlebar", NULL,
    "_Hide Titlebar when maximized", NULL,
    "Hide Titlebar when maximized",
    G_CALLBACK (activate_action),
    FALSE }
};
static guint n_toggle_entries = G_N_ELEMENTS (toggle_entries);

enum {
  COLOR_RED,
  COLOR_GREEN,
  COLOR_BLUE
};

static GtkRadioActionEntry color_entries[] = {
  { "Red", NULL,                               /* name, stock id */
    "_Red", "<control>R",                      /* label, accelerator */
    "Blood", COLOR_RED },                      /* tooltip, value */
  { "Green", NULL,                             /* name, stock id */
    "_Green", "<control>G",                    /* label, accelerator */
    "Grass", COLOR_GREEN },                    /* tooltip, value */
  { "Blue", NULL,                              /* name, stock id */
    "_Blue", "<control>B",                     /* label, accelerator */
    "Sky", COLOR_BLUE },                       /* tooltip, value */
};
static guint n_color_entries = G_N_ELEMENTS (color_entries);

enum {
  SHAPE_SQUARE,
  SHAPE_RECTANGLE,
  SHAPE_OVAL
};

static GtkRadioActionEntry shape_entries[] = {
  { "Square", NULL,                            /* name, stock id */
    "_Square", "<control>S",                   /* label, accelerator */
    "Square",  SHAPE_SQUARE },                 /* tooltip, value */
  { "Rectangle", NULL,                         /* name, stock id */
    "_Rectangle", "<control>R",                /* label, accelerator */
    "Rectangle", SHAPE_RECTANGLE },            /* tooltip, value */
  { "Oval", NULL,                              /* name, stock id */
    "_Oval", "<control>O",                     /* label, accelerator */
    "Egg", SHAPE_OVAL },                       /* tooltip, value */
};
static guint n_shape_entries = G_N_ELEMENTS (shape_entries);

static const gchar *ui_info =
"<ui>"
"  <menubar name='MenuBar'>"
"    <menu action='FileMenu'>"
"      <menuitem action='New'/>"
"      <menuitem action='Open'/>"
"      <menuitem action='Save'/>"
"      <menuitem action='SaveAs'/>"
"      <separator/>"
"      <menuitem action='Quit'/>"
"    </menu>"
"    <menu action='PreferencesMenu'>"
"      <menuitem action='DarkTheme'/>"
"      <menuitem action='HideTitlebar'/>"
"      <menu action='ColorMenu'>"
"       <menuitem action='Red'/>"
"       <menuitem action='Green'/>"
"       <menuitem action='Blue'/>"
"      </menu>"
"      <menu action='ShapeMenu'>"
"        <menuitem action='Square'/>"
"        <menuitem action='Rectangle'/>"
"        <menuitem action='Oval'/>"
"      </menu>"
"      <menuitem action='Bold'/>"
"    </menu>"
"    <menu action='HelpMenu'>"
"      <menuitem action='About'/>"
"    </menu>"
"  </menubar>"
"  <toolbar name='ToolBar'>"
"    <toolitem action='Open'>"
"      <menu action='OpenMenu'>"
"        <menuitem action='File1'/>"
"      </menu>"
"    </toolitem>"
"    <toolitem action='Quit'/>"
"    <separator action='Sep1'/>"
"    <toolitem action='Logo'/>"
"  </toolbar>"
"</ui>";



/* This function registers our custom toolbar icons, so they can be themed.
 *
 * It's totally optional to do this, you could just manually insert icons
 * and have them not be themeable, especially if you never expect people
 * to theme your app.
 */
static void
register_stock_icons (void)
{
  static gboolean registered = FALSE;

  if (!registered)
    {
      GdkPixbuf *pixbuf;
      GtkIconFactory *factory;
      GtkIconSet *icon_set;
      GdkPixbuf *transparent;

      static GtkStockItem items[] = {
        { "demo-gtk-logo",
          "_GTK!",
          0, 0, NULL }
      };

      registered = TRUE;

      /* Register our stock items */
      gtk_stock_add (items, G_N_ELEMENTS (items));

      /* Add our custom icon factory to the list of defaults */
      factory = gtk_icon_factory_new ();
      gtk_icon_factory_add_default (factory);

      pixbuf = gdk_pixbuf_new_from_resource ("/appwindow/gtk-logo-rgb.gif", NULL);
      /* We assert the existence of the pixbuf as we load it from a custom resource. */
      g_assert (pixbuf);

      /* The gtk-logo-rgb icon has a white background, make it transparent */
      transparent = gdk_pixbuf_add_alpha (pixbuf, TRUE, 0xff, 0xff, 0xff);

      icon_set = gtk_icon_set_new_from_pixbuf (transparent);
      gtk_icon_factory_add (factory, "demo-gtk-logo", icon_set);
      gtk_icon_set_unref (icon_set);
      g_object_unref (pixbuf);
      g_object_unref (transparent);

      /* Drop our reference to the factory, GTK will hold a reference. */
      g_object_unref (factory);
    }
}

static void
update_statusbar (GtkTextBuffer *buffer,
                  GtkStatusbar  *statusbar)
{
  gchar *msg;
  gint row, col;
  gint count;
  GtkTextIter iter;

  gtk_statusbar_pop (statusbar, 0); /* clear any previous message,
                                     * underflow is allowed
                                     */

  count = gtk_text_buffer_get_char_count (buffer);

  gtk_text_buffer_get_iter_at_mark (buffer,
                                    &iter,
                                    gtk_text_buffer_get_insert (buffer));

  row = gtk_text_iter_get_line (&iter);
  col = gtk_text_iter_get_line_offset (&iter);

  msg = g_strdup_printf ("Cursor at row %d column %d - %d chars in document",
                         row, col, count);

  gtk_statusbar_push (statusbar, 0, msg);

  g_free (msg);
}

static void
mark_set_callback (GtkTextBuffer     *buffer,
                   const GtkTextIter *new_location,
                   GtkTextMark       *mark,
                   gpointer           data)
{
  update_statusbar (buffer, GTK_STATUSBAR (data));
}

GtkWidget *
do_appwindow (GtkWidget *do_widget)
{
  if (!window)
    {
      GtkWidget *table;
      GtkWidget *statusbar;
      GtkWidget *contents;
      GtkWidget *sw;
      GtkWidget *bar;
      GtkTextBuffer *buffer;
      GtkActionGroup *action_group;
      GtkAction *open_action;
      GtkUIManager *merge;
      GError *error = NULL;

      register_stock_icons ();

      /* Create the toplevel window
       */

      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_screen (GTK_WINDOW (window),
                             gtk_widget_get_screen (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Application Window");
      gtk_window_set_icon_name (GTK_WINDOW (window), "document-open");

      /* NULL window variable when window is closed */
      g_signal_connect (window, "destroy",
                        G_CALLBACK (gtk_widget_destroyed),
                        &window);

      table = gtk_grid_new ();

      gtk_container_add (GTK_CONTAINER (window), table);

      /* Create the menubar and toolbar
       */

      action_group = gtk_action_group_new ("AppWindowActions");
      open_action = g_object_new (tool_menu_action_get_type (),
                                  "name", "Open",
                                  "label", "_Open",
                                  "tooltip", "Open a file",
                                  "stock-id", GTK_STOCK_OPEN,
                                  NULL);
      gtk_action_group_add_action (action_group, open_action);
      g_object_unref (open_action);
      gtk_action_group_add_actions (action_group,
                                    entries, n_entries,
                                    window);
      gtk_action_group_add_toggle_actions (action_group,
                                           toggle_entries, n_toggle_entries,
                                           NULL);
      gtk_action_group_add_radio_actions (action_group,
                                          color_entries, n_color_entries,
                                          COLOR_RED,
                                          G_CALLBACK (activate_radio_action),
                                          NULL);
      gtk_action_group_add_radio_actions (action_group,
                                          shape_entries, n_shape_entries,
                                          SHAPE_SQUARE,
                                          G_CALLBACK (activate_radio_action),
                                          NULL);

      merge = gtk_ui_manager_new ();
      g_object_set_data_full (G_OBJECT (window), "ui-manager", merge,
                              g_object_unref);
      gtk_ui_manager_insert_action_group (merge, action_group, 0);
      gtk_window_add_accel_group (GTK_WINDOW (window),
                                  gtk_ui_manager_get_accel_group (merge));

      if (!gtk_ui_manager_add_ui_from_string (merge, ui_info, -1, &error))
        {
          g_message ("building menus failed: %s", error->message);
          g_error_free (error);
        }

      bar = gtk_ui_manager_get_widget (merge, "/MenuBar");
      gtk_widget_show (bar);
      gtk_widget_set_halign (bar, GTK_ALIGN_FILL);
      gtk_grid_attach (GTK_GRID (table), bar, 0, 0, 1, 1);

      bar = gtk_ui_manager_get_widget (merge, "/ToolBar");
      gtk_widget_show (bar);
      gtk_widget_set_halign (bar, GTK_ALIGN_FILL);
      gtk_grid_attach (GTK_GRID (table), bar, 0, 1, 1, 1);

      /* Create document
       */

      infobar = gtk_info_bar_new ();
      gtk_widget_set_no_show_all (infobar, TRUE);
      messagelabel = gtk_label_new ("");
      gtk_widget_show (messagelabel);
      gtk_box_pack_start (GTK_BOX (gtk_info_bar_get_content_area (GTK_INFO_BAR (infobar))),
                          messagelabel,
                          TRUE, TRUE, 0);
      gtk_info_bar_add_button (GTK_INFO_BAR (infobar),
                               GTK_STOCK_OK, GTK_RESPONSE_OK);
      g_signal_connect (infobar, "response",
                        G_CALLBACK (gtk_widget_hide), NULL);

      gtk_widget_set_halign (infobar, GTK_ALIGN_FILL);
      gtk_grid_attach (GTK_GRID (table), infobar, 0, 2, 1, 1);

      sw = gtk_scrolled_window_new (NULL, NULL);

      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                      GTK_POLICY_AUTOMATIC,
                                      GTK_POLICY_AUTOMATIC);

      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
                                           GTK_SHADOW_IN);

      gtk_widget_set_halign (sw, GTK_ALIGN_FILL);
      gtk_widget_set_valign (sw, GTK_ALIGN_FILL);
      gtk_widget_set_hexpand (sw, TRUE);
      gtk_widget_set_vexpand (sw, TRUE);
      gtk_grid_attach (GTK_GRID (table), sw, 0, 3, 1, 1);

      gtk_window_set_default_size (GTK_WINDOW (window),
                                   200, 200);

      contents = gtk_text_view_new ();
      gtk_widget_grab_focus (contents);

      gtk_container_add (GTK_CONTAINER (sw),
                         contents);

      /* Create statusbar */

      statusbar = gtk_statusbar_new ();
      gtk_widget_set_halign (sw, GTK_ALIGN_FILL);
      gtk_grid_attach (GTK_GRID (table), statusbar, 0, 4, 1, 1);

      /* Show text widget info in the statusbar */
      buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (contents));

      g_signal_connect_object (buffer,
                               "changed",
                               G_CALLBACK (update_statusbar),
                               statusbar,
                               0);

      g_signal_connect_object (buffer,
                               "mark_set", /* cursor moved */
                               G_CALLBACK (mark_set_callback),
                               statusbar,
                               0);

      update_statusbar (buffer, GTK_STATUSBAR (statusbar));
    }

  if (!gtk_widget_get_visible (window))
    {
      gtk_widget_show_all (window);
    }
  else
    {
      gtk_widget_destroy (window);
      window = NULL;
      infobar = NULL;
      messagelabel = NULL;
    }

  return window;
}