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/* Create a new assistant widget with no pages. */ assistant = gtk_assistant_new (); gtk_widget_set_size_request (assistant, 450, 300); gtk_window_set_title (GTK_WINDOW (assistant), "GtkAssistant Example"); g_signal_connect (G_OBJECT (assistant), "destroy", G_CALLBACK (gtk_main_quit), NULL); page[0].widget = gtk_label_new ("This is an example of a GtkAssistant. By\n"\ "clicking the forward button, you can continue\n"\ "to the next section!"); page[1].widget = gtk_hbox_new (FALSE, 5); page[2].widget = gtk_check_button_new_with_label ("Click Me To Continue!"); page[3].widget = gtk_alignment_new (0.5, 0.5, 0.0, 0.0); page[4].widget = gtk_label_new ("Text has been entered in the label and the\n"\ "combo box is clicked. If you are done, then\n"\ "it is time to leave!"); /* Create the necessary widgets for the second page. */ label = gtk_label_new ("Your Name: "); entry = gtk_entry_new (); gtk_box_pack_start (GTK_BOX (page[1].widget), label, FALSE, FALSE, 5); gtk_box_pack_start (GTK_BOX (page[1].widget), entry, FALSE, FALSE, 5); /* Create the necessary widgets for the fourth page. The, Attach the progress bar * to the GtkAlignment widget for later access.*/ button = gtk_button_new_with_label ("Click me!"); progress = gtk_progress_bar_new (); hbox = gtk_hbox_new (FALSE, 5); gtk_box_pack_start (GTK_BOX (hbox), progress, TRUE, FALSE, 5); gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 5); gtk_container_add (GTK_CONTAINER (page[3].widget), hbox); g_object_set_data (G_OBJECT (page[3].widget), "pbar", (gpointer) progress); /* Add five pages to the GtkAssistant dialog. */ for (i = 0; i < 5; i++) { page[i].index = gtk_assistant_append_page (GTK_ASSISTANT (assistant), page[i].widget); gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page[i].widget, page[i].title); gtk_assistant_set_page_type (GTK_ASSISTANT (assistant), page[i].widget, page[i].type);
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/* Set the introduction and conclusion pages as complete so they can be * incremented or closed. */ gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page[i].widget, page[i].complete); } /* Update whether pages 2 through 4 are complete based upon whether there is * text in the GtkEntry, the check button is active, or the progress bar * is completely filled. */ g_signal_connect (G_OBJECT (entry), "changed", G_CALLBACK (entry_changed), (gpointer) assistant); g_signal_connect (G_OBJECT (page[2].widget), "toggled", G_CALLBACK (button_toggled), (gpointer) assistant); g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (button_clicked), (gpointer) assistant); g_signal_connect (G_OBJECT (assistant), "cancel", G_CALLBACK (assistant_cancel), NULL); g_signal_connect (G_OBJECT (assistant), "close", G_CALLBACK (assistant_close), NULL); gtk_widget_show_all (assistant); gtk_main (); return 0; } /* If there is text in the GtkEntry, set the page as complete. Otherwise, * stop the user from progressing the next page. */ static void entry_changed (GtkEditable *entry, GtkAssistant *assistant) { const gchar *text = gtk_entry_get_text (GTK_ENTRY (entry)); gint num = gtk_assistant_get_current_page (assistant); GtkWidget *page = gtk_assistant_get_nth_page (assistant, num); gtk_assistant_set_page_complete (assistant, page, (strlen (text) > 0)); } /* If the check button is toggled, set the page as complete. Otherwise, * stop the user from progressing the next page. */ static void button_toggled (GtkCheckButton *toggle, GtkAssistant *assistant)
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{ gboolean active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (toggle)); gtk_assistant_set_page_complete (assistant, GTK_WIDGET (toggle), active); } /* Fill up the progress bar, 10% every second when the button is clicked. Then, * set the page as complete when the progress bar is filled. */ static void button_clicked (GtkButton *button, GtkAssistant *assistant) { GtkProgressBar *progress; GtkWidget *page; gdouble percent = 0.0; gtk_widget_set_sensitive (GTK_WIDGET (button), FALSE); page = gtk_assistant_get_nth_page (assistant, 3); progress = GTK_PROGRESS_BAR (g_object_get_data (G_OBJECT (page), "pbar")); while (percent <= 100.0) { gchar *message = g_strdup_printf ("%.0f%% Complete", percent); gtk_progress_bar_set_fraction (progress, percent / 100.0); gtk_progress_bar_set_text (progress, message); while (gtk_events_pending ()) gtk_main_iteration (); g_usleep (500000); percent += 5.0; } gtk_assistant_set_page_complete (assistant, page, TRUE); } /* If the dialog is cancelled, delete it from memory and then clean up after * the Assistant structure. */ static void assistant_cancel (GtkAssistant *assistant, gpointer data)
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{ gtk_widget_destroy (GTK_WIDGET (assistant)); } /* This function is where you would apply the changes and destroy the assistant. */ static void assistant_close (GtkAssistant *assistant, gpointer data) { g_print ("You would apply your changes now!\n"); gtk_widget_destroy (GTK_WIDGET (assistant)); }
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A GtkAssistant widget is a dialog with multiple pages, although it is actually not derived from GtkDialog. By calling gtk_assistant_new(), you create a new GtkAssistant widget with no initial pages. index = gtk_assistant_append_page (GTK_ASSISTANT (assistant), widget); There is no actual page widget for assistants, because each page is actually a child widget that is added with gtk_assistant_prepend_page(), gtk_assistant_append_page(), or gtk_assistant_insert_page(). Each of these functions accepts the child widget that is added as the content of the page and returns the new page s index. Each page has a number of properties that can be set, each of which is optional. A list of these options follows: Page title: Every page should have a title, so the user knows what it is for. Your first page should be an introductory page that tells the user information about the assistant. The last page must be a summary or confirmation page that makes sure the user is ready to apply the previous changes. Header image: In the top panel, you can display an optional image to the left of the title. This is often the application s logo or an image that complements the assistant s purpose. Side image: This optional image is placed along the left side of the assistant beside the main page content. It is meant to be used for aesthetic appeal. Page type: The page type must always be set, or it will default to GTK_ASSISTANT_ PAGE_CONTENT. The last page must always be a confirmation or summary page. You should also make the first page an introductory page that gives the user information about what task the assistant performs.
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