/* Assistant * * Demonstrates a sample multi-step assistant. Assistants are used to divide * an operation into several simpler sequential steps, and to guide the user * through these steps. */ #include <gtk/gtk.h> #include "demo-common.h" static GtkWidget *assistant = NULL; static GtkWidget *progress_bar = NULL; static gboolean apply_changes_gradually (gpointer data) { gdouble fraction; /* Work, work, work... */ fraction = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR (progress_bar)); fraction += 0.05; if (fraction < 1.0) { gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress_bar), fraction); return G_SOURCE_CONTINUE; } else { /* Close automatically once changes are fully applied. */ gtk_widget_destroy (assistant); assistant = NULL; return G_SOURCE_REMOVE; } } static void on_assistant_apply (GtkWidget *widget, gpointer data) { /* Start a timer to simulate changes taking a few seconds to apply. */ g_timeout_add (100, apply_changes_gradually, NULL); } static void on_assistant_close_cancel (GtkWidget *widget, gpointer data) { GtkWidget **assistant = (GtkWidget **) data; gtk_widget_destroy (*assistant); *assistant = NULL; } static void on_assistant_prepare (GtkWidget *widget, GtkWidget *page, gpointer data) { gint current_page, n_pages; gchar *title; current_page = gtk_assistant_get_current_page (GTK_ASSISTANT (widget)); n_pages = gtk_assistant_get_n_pages (GTK_ASSISTANT (widget)); title = g_strdup_printf ("Sample assistant (%d of %d)", current_page + 1, n_pages); gtk_window_set_title (GTK_WINDOW (widget), title); g_free (title); /* The fourth page (counting from zero) is the progress page. The * user clicked Apply to get here so we tell the assistant to commit, * which means the changes up to this point are permanent and cannot * be cancelled or revisited. */ if (current_page == 3) gtk_assistant_commit (GTK_ASSISTANT (widget)); } static void on_entry_changed (GtkWidget *widget, gpointer data) { GtkAssistant *assistant = GTK_ASSISTANT (data); GtkWidget *current_page; gint page_number; const gchar *text; page_number = gtk_assistant_get_current_page (assistant); current_page = gtk_assistant_get_nth_page (assistant, page_number); text = gtk_entry_get_text (GTK_ENTRY (widget)); if (text && *text) gtk_assistant_set_page_complete (assistant, current_page, TRUE); else gtk_assistant_set_page_complete (assistant, current_page, FALSE); } static void create_page1 (GtkWidget *assistant) { GtkWidget *box, *label, *entry; box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12); gtk_container_set_border_width (GTK_CONTAINER (box), 12); label = gtk_label_new ("You must fill out this entry to continue:"); gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0); entry = gtk_entry_new (); gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE); gtk_box_pack_start (GTK_BOX (box), entry, TRUE, TRUE, 0); g_signal_connect (G_OBJECT (entry), "changed", G_CALLBACK (on_entry_changed), assistant); gtk_widget_show_all (box); gtk_assistant_append_page (GTK_ASSISTANT (assistant), box); gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), box, "Page 1"); gtk_assistant_set_page_type (GTK_ASSISTANT (assistant), box, GTK_ASSISTANT_PAGE_INTRO); } static void create_page2 (GtkWidget *assistant) { GtkWidget *box, *checkbutton; box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12); gtk_container_set_border_width (GTK_CONTAINER (box), 12); checkbutton = gtk_check_button_new_with_label ("This is optional data, you may continue " "even if you do not check this"); gtk_box_pack_start (GTK_BOX (box), checkbutton, FALSE, FALSE, 0); gtk_widget_show_all (box); gtk_assistant_append_page (GTK_ASSISTANT (assistant), box); gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), box, TRUE); gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), box, "Page 2"); } static void create_page3 (GtkWidget *assistant) { GtkWidget *label; label = gtk_label_new ("This is a confirmation page, press 'Apply' to apply changes"); gtk_widget_show (label); gtk_assistant_append_page (GTK_ASSISTANT (assistant), label); gtk_assistant_set_page_type (GTK_ASSISTANT (assistant), label, GTK_ASSISTANT_PAGE_CONFIRM); gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), label, TRUE); gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), label, "Confirmation"); } static void create_page4 (GtkWidget *assistant) { progress_bar = gtk_progress_bar_new (); gtk_widget_set_halign (progress_bar, GTK_ALIGN_CENTER); gtk_widget_set_valign (progress_bar, GTK_ALIGN_CENTER); gtk_widget_show (progress_bar); gtk_assistant_append_page (GTK_ASSISTANT (assistant), progress_bar); gtk_assistant_set_page_type (GTK_ASSISTANT (assistant), progress_bar, GTK_ASSISTANT_PAGE_PROGRESS); gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), progress_bar, "Applying changes"); /* This prevents the assistant window from being * closed while we're "busy" applying changes. */ gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), progress_bar, FALSE); } GtkWidget* do_assistant (GtkWidget *do_widget) { if (!assistant) { assistant = gtk_assistant_new (); gtk_window_set_default_size (GTK_WINDOW (assistant), -1, 300); gtk_window_set_screen (GTK_WINDOW (assistant), gtk_widget_get_screen (do_widget)); create_page1 (assistant); create_page2 (assistant); create_page3 (assistant); create_page4 (assistant); g_signal_connect (G_OBJECT (assistant), "cancel", G_CALLBACK (on_assistant_close_cancel), &assistant); g_signal_connect (G_OBJECT (assistant), "close", G_CALLBACK (on_assistant_close_cancel), &assistant); g_signal_connect (G_OBJECT (assistant), "apply", G_CALLBACK (on_assistant_apply), NULL); g_signal_connect (G_OBJECT (assistant), "prepare", G_CALLBACK (on_assistant_prepare), NULL); } if (!gtk_widget_get_visible (assistant)) gtk_widget_show (assistant); else { gtk_widget_destroy (assistant); assistant = NULL; } return assistant; }