Blame platform-demos/C/samples/tooltip.c

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#include <gtk/gtk.h>
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static gboolean 
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undo_tooltip_callback (GtkStatusIcon *status_icon,
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                       gint           x,
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                       gint           y,
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                       gboolean       keyboard_mode,
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                       GtkTooltip    *tooltip,
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                       gpointer       user_data)
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{
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  /* set the text for the tooltip */
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  gtk_tooltip_set_text (tooltip, "Undo your last action");
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  /* set an icon fot the tooltip */
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  gtk_tooltip_set_icon_from_stock(tooltip, "gtk-undo", GTK_ICON_SIZE_MENU);
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  /* show the tooltip */
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  return TRUE;
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}
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static void
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undo_callback (GSimpleAction *simple,
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               GVariant      *parameter,
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               gpointer       user_data)
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{
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  g_print ("You clicked \"Undo\".\n");
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}
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static void
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activate (GtkApplication *app,
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          gpointer        user_data)
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{
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  GtkWidget *grid;
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  GtkWidget *window;
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  GtkWidget *toolbar;
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  GtkToolItem *new_button;
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  GtkToolItem *open_button;
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  GtkToolItem *undo_button;
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  GtkStyleContext *style_context;
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  GSimpleAction *undo_action;
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  window = gtk_application_window_new (app);
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  gtk_window_set_title (GTK_WINDOW (window), "Toolbar with Tooltips Example");
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  gtk_window_set_default_size (GTK_WINDOW (window), 400, 200);
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  /* Here we begin to create the toolbar */
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  toolbar = gtk_toolbar_new ();
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  /* Set the toolbar to be the primary toolbar of the application */
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  style_context = gtk_widget_get_style_context (toolbar);
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  gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_PRIMARY_TOOLBAR);
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  /* Create a button for the "new" action, with a stock image */
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  new_button = gtk_tool_button_new_from_stock (GTK_STOCK_NEW);
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  gtk_tool_item_set_is_important (new_button, TRUE);
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  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), new_button, 0);
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  gtk_widget_show (GTK_WIDGET (new_button));
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  /* Set the action name for the "new" action. We use "app.new" to
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   * indicate that the action controls the application.
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   */
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  gtk_actionable_set_action_name (GTK_ACTIONABLE (new_button), "app.new");
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  /*******************************
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   * Tooltip for the New ToolItem:
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   * a tooltip with text
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   *******************************/
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   gtk_tool_item_set_tooltip_text (new_button, "Create a new file");  
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  /* "Open" */
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  open_button = gtk_tool_button_new_from_stock (GTK_STOCK_OPEN);
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  gtk_tool_item_set_is_important (open_button, TRUE);
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  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), open_button, 1);
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  gtk_widget_show (GTK_WIDGET (open_button));
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  gtk_actionable_set_action_name (GTK_ACTIONABLE (open_button), "app.open");
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  /*******************************
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   * Tooltip for the Open ToolItem:
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   * a tooltip using Pango markup 
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   * language
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   *******************************/
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  gtk_tool_item_set_tooltip_text (open_button, "Open an existing file");
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  /* "Undo" */
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  undo_button = gtk_tool_button_new_from_stock (GTK_STOCK_UNDO);
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  gtk_tool_item_set_is_important (undo_button, TRUE);
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  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), undo_button, 2);
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  gtk_widget_show (GTK_WIDGET (undo_button));
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  /* In this case, we use "win.undo" to indicate that
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   * the action controls only the window
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   */
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  gtk_actionable_set_action_name (GTK_ACTIONABLE (undo_button), "win.undo");
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  /*******************************
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   * Tooltip for the Undo ToolItem:
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   * a tooltip with an image
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   *******************************/
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  gtk_widget_set_has_tooltip (GTK_WIDGET (undo_button), TRUE);
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  // Next, we connect the query_tooltip signal
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  g_signal_connect (undo_button, "query-tooltip", G_CALLBACK (undo_tooltip_callback), NULL);
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  gtk_widget_set_hexpand (toolbar, TRUE);
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  gtk_widget_show (toolbar);
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  grid = gtk_grid_new ();
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  gtk_grid_attach (GTK_GRID (grid), toolbar, 0, 0, 1, 1);
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  gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (grid));
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  gtk_widget_show (GTK_WIDGET (grid));
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  /* Use the action names to create the actions that control the window, and
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   * connect them to the appropriate callbackfunctions.
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   */
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  undo_action = g_simple_action_new ("undo", NULL);
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  g_signal_connect (undo_action, "activate", G_CALLBACK (undo_callback),
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                    GTK_WINDOW (window));
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  g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (undo_action));
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  gtk_widget_show (window);
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}
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/* Callback function for the new action */
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static void
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new_callback (GSimpleAction *simple,
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              GVariant      *parameter,
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              gpointer       user_data)
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{
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  g_print ("You clicked \"New\".\n");
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}
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/* Callback function for the open action */
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static void
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open_callback (GSimpleAction *simple,
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               GVariant      *parameter,
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               gpointer       user_data)
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{
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  g_print ("You clicked \"Open\".\n");
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}
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/* In this function, we create the actions in which control the window, and
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 * connect their signals to the appropriate callback function.
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 */
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static void
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startup (GApplication *app,
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         gpointer      user_data)
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{
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  GSimpleAction *new_action;
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  GSimpleAction *open_action;
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  new_action = g_simple_action_new ("new", NULL);
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  g_signal_connect (new_action, "activate", G_CALLBACK (new_callback), app);
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  g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (new_action));
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  open_action = g_simple_action_new ("open", NULL);
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  g_signal_connect (open_action, "activate", G_CALLBACK (open_callback), app);
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  g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (open_action));
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}
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/* Startup function for the application */
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int
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main (int argc, char **argv)
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{
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  GtkApplication *app;
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  int status;
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  app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
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  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
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  g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);
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  status = g_application_run (G_APPLICATION (app), argc, argv);
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  g_object_unref (app);
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  return status;
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}