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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="toolbar.c" xml:lang="cs">
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<info>
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<title type="text">Toolbar (C)</title>
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<link type="guide" xref="c#menu-combo-toolbar"/>
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<link type="seealso" xref="menubar.c"/>
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<link type="seealso" xref="grid.c"/>
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<revision version="0.1" date="2012-08-19" status="draft"/>
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<credit type="author copyright">
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<name>Monica Kochofar</name>
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<email its:translate="no">monicakochofar@gmail.com</email>
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<years>2012</years>
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</credit>
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<desc>Lišta s tlačítky</desc>
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</info>
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<title>Toolbar</title>
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<media type="image" mime="image/png" src="media/toolbar.png"/>
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Nástrojová lišta může obsahovat text nebo standardní ikony. V tomto příkladu používáme standardní ikony. Tento příklad obsahuje funkci pro zobrazení na celou obrazovku.
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Tento příklad používá SimpleAction (jednoduchá akce), pro okno i pro aplikaci. Akci pro aplikaci lze snadno přidat do aplikační nabídky.
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#include <gtk/gtk.h>
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/* Deklaruje tato dvě nástrojová tlačítka, protože obě budou použita jak
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* ve zpětném volání akce „celá obrazovka“, tak v aktivační funkci
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*/
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GtkToolItem *fullscreen_button;
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GtkToolItem *leavefullscreen_button;
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/* Funkce zpětného volání pro akci „zpět“ */
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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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/* Funkce zpětného volání pro akci „celá obrazovka“ */
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static void
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fullscreen_callback (GSimpleAction *simple,
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GVariant *parameter,
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gpointer user_data)
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{
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GdkWindow *window = gtk_widget_get_window (GTK_WIDGET (user_data));
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GdkWindowState current_state = gdk_window_get_state (window);
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/* Jestliže je okno právě v režimu celé obrazovky */
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if ( (current_state & GDK_WINDOW_STATE_FULLSCREEN) != 0)
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{
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/* Minimalizuje okno a změní tlačítko na „celá obrazovka“ */
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gdk_window_unfullscreen (window);
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gtk_widget_hide (GTK_WIDGET(leavefullscreen_button));
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gtk_widget_show (GTK_WIDGET(fullscreen_button));
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}
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else
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{
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/* Maximalizuje okno a znění tlačítko na „opustit celou obrazovku“ */
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gdk_window_fullscreen (window);
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gtk_widget_hide (GTK_WIDGET (fullscreen_button));
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gtk_widget_show (GTK_WIDGET (leavefullscreen_button));
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}
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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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/* Inicializace proměnných */
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GtkWidget *window;
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GtkWidget *grid;
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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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GSimpleAction *fullscreen_action;
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GSimpleAction *leavefullscreen_action;
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/* Vytvoří okno s název pro záhlaví a výchozí velikostí */
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window = gtk_application_window_new (app);
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gtk_window_set_title (GTK_WINDOW (window), "Toolbar Example");
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gtk_window_set_default_size (GTK_WINDOW (window), 400, 200);
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/* Zde začínáme vytvářet nástrojovou lištu */
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toolbar = gtk_toolbar_new ();
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/* Nastavíme nástrojovou lištu jako hlavní pro aplikaci */
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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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/* Vytvoříme tlačítko pro akci "new", se standardním obrázkem */
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new_button = gtk_tool_button_new_from_stock (GTK_STOCK_NEW);
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/* Zapne zobrazování popisku tlačítka "new" */
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gtk_tool_item_set_is_important (new_button, TRUE);
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/* Vloží tlačítko na požadovanou pozici na nástrojové liště */
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gtk_toolbar_insert (GTK_TOOLBAR (toolbar), new_button, 0);
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/* Zobrazí tlačítko */
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gtk_widget_show (GTK_WIDGET (new_button));
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/* Nastaví název akce pro akci "new". Použijeme "app.new",
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* aby bylo poznak, že akce ovládá aplikaci
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*/
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gtk_actionable_set_action_name (GTK_ACTIONABLE (new_button), "app.new");
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/* Zopakuje stejné kroky pro akci "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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/* Zopakuje stejné kroky pro akci "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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/* V tomto případě použijeme "win.undo", aby se poznalo, že
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* akce ovládá jen okno
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*/
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gtk_actionable_set_action_name (GTK_ACTIONABLE (undo_button), "win.undo");
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/* Zopakuje stejné kroky pro akci "fullscreen" */
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fullscreen_button = gtk_tool_button_new_from_stock (GTK_STOCK_FULLSCREEN);
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gtk_tool_item_set_is_important (fullscreen_button, TRUE);
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gtk_toolbar_insert (GTK_TOOLBAR (toolbar), fullscreen_button, 3);
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gtk_widget_show (GTK_WIDGET (fullscreen_button));
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gtk_actionable_set_action_name (GTK_ACTIONABLE (fullscreen_button),
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"win.fullscreen");
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/* Zopakuje stejné kroky pro akci "leavefullscreen" */
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leavefullscreen_button = gtk_tool_button_new_from_stock (GTK_STOCK_LEAVE_FULLSCREEN);
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gtk_tool_item_set_is_important (leavefullscreen_button, TRUE);
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gtk_toolbar_insert (GTK_TOOLBAR (toolbar), leavefullscreen_button, 3);
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/* Jediný rozdíl zde je, že se tlačítko "leavefullscreen" nezobrazí,
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* protože až později nahradí tlačítko "fullscreen".
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*/
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gtk_actionable_set_action_name (GTK_ACTIONABLE (leavefullscreen_button),
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"win.leavefullscreen");
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/* Jakmile vytvoříme základ nástrojové lišty, ujistíme se,
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* že je ve vodorovném směru dostatek místa
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*/
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gtk_widget_set_hexpand (toolbar, TRUE);
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gtk_widget_show (toolbar);
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/* Připojíme nástrojovou lištu do mřížky a tu přidáme do hlavního okna */
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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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/* Použijeme názvy akcí k vytvoření akcí, které ovládají okno, a
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* napojíme je na příslušné funkce zpětného volání
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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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fullscreen_action = g_simple_action_new ("fullscreen", NULL);
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g_signal_connect (fullscreen_action, "activate", G_CALLBACK (fullscreen_callback),
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GTK_WINDOW (window));
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g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (fullscreen_action));
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leavefullscreen_action = g_simple_action_new ("leavefullscreen", NULL);
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g_signal_connect (leavefullscreen_action, "activate", G_CALLBACK (fullscreen_callback),
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GTK_WINDOW (window));
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g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (leavefullscreen_action));
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gtk_widget_show (window);
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}
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/* Funkce zpětného volání pro akci "new" */
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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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/* Funkce zpětného volání pro akci "open" */
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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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/* V této funkci vytvoříme akce, které ovládají aplikaci a napojíme
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* jejich signály na příslušnou funkci zpětného volání
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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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/* Spouštěcí funkce pro aplikaci */
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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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}
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V této ukázce se používá následující:
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<list>
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<item><link href="http://developer.gnome.org/gtk3/stable/GtkToolbar.html">GtkToolbar</link> </item>
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<item><link href="http://developer.gnome.org/gtk3/stable/GtkToolButton.html">GtkToolbutton</link> </item>
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1470ea |
</list>
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1470ea |
</page>
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