/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * GtkStatusbar Copyright (C) 1998 Shawn T. Amundson * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see . */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" #include "gtkstatusbar.h" #include "gtkstatusbarprivate.h" #include "gtkbinlayout.h" #include "gtklabel.h" #include "gtkmarshalers.h" #include "gtkprivate.h" #include "gtkintl.h" #include "gtkorientable.h" #include "gtktypebuiltins.h" #include "gtkwidgetprivate.h" /** * SECTION:gtkstatusbar * @title: GtkStatusbar * @short_description: Report messages of minor importance to the user * * A #GtkStatusbar is usually placed along the bottom of an application's * main #GtkWindow. It may provide a regular commentary of the application's * status (as is usually the case in a web browser, for example), or may be * used to simply output a message when the status changes, (when an upload * is complete in an FTP client, for example). * * Status bars in GTK+ maintain a stack of messages. The message at * the top of the each bar’s stack is the one that will currently be displayed. * * Any messages added to a statusbar’s stack must specify a * context id that is used to uniquely identify * the source of a message. This context id can be generated by * gtk_statusbar_get_context_id(), given a message and the statusbar that * it will be added to. Note that messages are stored in a stack, and when * choosing which message to display, the stack structure is adhered to, * regardless of the context identifier of a message. * * One could say that a statusbar maintains one stack of messages for * display purposes, but allows multiple message producers to maintain * sub-stacks of the messages they produced (via context ids). * * Status bars are created using gtk_statusbar_new(). * * Messages are added to the bar’s stack with gtk_statusbar_push(). * * The message at the top of the stack can be removed using * gtk_statusbar_pop(). A message can be removed from anywhere in the * stack if its message id was recorded at the time it was added. This * is done using gtk_statusbar_remove(). * * # CSS node * * GtkStatusbar has a single CSS node with name statusbar. */ typedef struct _GtkStatusbarMsg GtkStatusbarMsg; typedef struct _GtkStatusbarClass GtkStatusbarClass; struct _GtkStatusbar { GtkWidget parent_instance; GtkWidget *label; GtkWidget *message_area; GSList *messages; GSList *keys; guint seq_context_id; guint seq_message_id; }; struct _GtkStatusbarClass { GtkWidgetClass parent_class; void (*text_pushed) (GtkStatusbar *statusbar, guint context_id, const char *text); void (*text_popped) (GtkStatusbar *statusbar, guint context_id, const char *text); }; struct _GtkStatusbarMsg { char *text; guint context_id; guint message_id; }; enum { SIGNAL_TEXT_PUSHED, SIGNAL_TEXT_POPPED, SIGNAL_LAST }; static void gtk_statusbar_update (GtkStatusbar *statusbar, guint context_id, const char *text); static void gtk_statusbar_msg_free (GtkStatusbarMsg *msg); static guint statusbar_signals[SIGNAL_LAST] = { 0 }; G_DEFINE_TYPE (GtkStatusbar, gtk_statusbar, GTK_TYPE_WIDGET) static void gtk_statusbar_dispose (GObject *object) { GtkStatusbar *self = GTK_STATUSBAR (object); g_slist_free_full (self->messages, (GDestroyNotify) gtk_statusbar_msg_free); self->messages = NULL; g_slist_free_full (self->keys, g_free); self->keys = NULL; g_clear_pointer (&self->message_area, gtk_widget_unparent); G_OBJECT_CLASS (gtk_statusbar_parent_class)->dispose (object); } static void gtk_statusbar_class_init (GtkStatusbarClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); object_class->dispose = gtk_statusbar_dispose; class->text_pushed = gtk_statusbar_update; class->text_popped = gtk_statusbar_update; /** * GtkStatusbar::text-pushed: * @statusbar: the object which received the signal * @context_id: the context id of the relevant message/statusbar * @text: the message that was pushed * * Is emitted whenever a new message gets pushed onto a statusbar's stack. */ statusbar_signals[SIGNAL_TEXT_PUSHED] = g_signal_new (I_("text-pushed"), G_OBJECT_CLASS_TYPE (class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkStatusbarClass, text_pushed), NULL, NULL, _gtk_marshal_VOID__UINT_STRING, G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_STRING); /** * GtkStatusbar::text-popped: * @statusbar: the object which received the signal * @context_id: the context id of the relevant message/statusbar * @text: the message that was just popped * * Is emitted whenever a new message is popped off a statusbar's stack. */ statusbar_signals[SIGNAL_TEXT_POPPED] = g_signal_new (I_("text-popped"), G_OBJECT_CLASS_TYPE (class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkStatusbarClass, text_popped), NULL, NULL, _gtk_marshal_VOID__UINT_STRING, G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_STRING); /* Bind class to template */ gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/ui/gtkstatusbar.ui"); gtk_widget_class_bind_template_child_internal (widget_class, GtkStatusbar, message_area); gtk_widget_class_bind_template_child (widget_class, GtkStatusbar, label); gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT); gtk_widget_class_set_css_name (widget_class, I_("statusbar")); } static void gtk_statusbar_init (GtkStatusbar *statusbar) { statusbar->seq_context_id = 1; statusbar->seq_message_id = 1; statusbar->messages = NULL; statusbar->keys = NULL; gtk_widget_init_template (GTK_WIDGET (statusbar)); } /** * gtk_statusbar_new: * * Creates a new #GtkStatusbar ready for messages. * * Returns: the new #GtkStatusbar */ GtkWidget* gtk_statusbar_new (void) { return g_object_new (GTK_TYPE_STATUSBAR, NULL); } static void gtk_statusbar_update (GtkStatusbar *statusbar, guint context_id, const char *text) { g_return_if_fail (GTK_IS_STATUSBAR (statusbar)); if (!text) text = ""; gtk_label_set_text (GTK_LABEL (statusbar->label), text); } /** * gtk_statusbar_get_context_id: * @statusbar: a #GtkStatusbar * @context_description: textual description of what context * the new message is being used in * * Returns a new context identifier, given a description * of the actual context. Note that the description is * not shown in the UI. * * Returns: an integer id */ guint gtk_statusbar_get_context_id (GtkStatusbar *statusbar, const char *context_description) { char *string; guint id; g_return_val_if_fail (GTK_IS_STATUSBAR (statusbar), 0); g_return_val_if_fail (context_description != NULL, 0); /* we need to preserve namespaces on object data */ string = g_strconcat ("gtk-status-bar-context:", context_description, NULL); id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (statusbar), string)); if (id == 0) { id = statusbar->seq_context_id++; g_object_set_data_full (G_OBJECT (statusbar), string, GUINT_TO_POINTER (id), NULL); statusbar->keys = g_slist_prepend (statusbar->keys, string); } else g_free (string); return id; } static GtkStatusbarMsg * gtk_statusbar_msg_create (GtkStatusbar *statusbar, guint context_id, const char *text) { GtkStatusbarMsg *msg; msg = g_slice_new (GtkStatusbarMsg); msg->text = g_strdup (text); msg->context_id = context_id; msg->message_id = statusbar->seq_message_id++; return msg; } static void gtk_statusbar_msg_free (GtkStatusbarMsg *msg) { g_free (msg->text); g_slice_free (GtkStatusbarMsg, msg); } /** * gtk_statusbar_push: * @statusbar: a #GtkStatusbar * @context_id: the message’s context id, as returned by * gtk_statusbar_get_context_id() * @text: the message to add to the statusbar * * Pushes a new message onto a statusbar’s stack. * * Returns: a message id that can be used with * gtk_statusbar_remove(). */ guint gtk_statusbar_push (GtkStatusbar *statusbar, guint context_id, const char *text) { GtkStatusbarMsg *msg; g_return_val_if_fail (GTK_IS_STATUSBAR (statusbar), 0); g_return_val_if_fail (text != NULL, 0); msg = gtk_statusbar_msg_create (statusbar, context_id, text); statusbar->messages = g_slist_prepend (statusbar->messages, msg); g_signal_emit (statusbar, statusbar_signals[SIGNAL_TEXT_PUSHED], 0, msg->context_id, msg->text); return msg->message_id; } /** * gtk_statusbar_pop: * @statusbar: a #GtkStatusbar * @context_id: a context identifier * * Removes the first message in the #GtkStatusbar’s stack * with the given context id. * * Note that this may not change the displayed message, if * the message at the top of the stack has a different * context id. */ void gtk_statusbar_pop (GtkStatusbar *statusbar, guint context_id) { GtkStatusbarMsg *msg; g_return_if_fail (GTK_IS_STATUSBAR (statusbar)); if (statusbar->messages) { GSList *list; for (list = statusbar->messages; list; list = list->next) { msg = list->data; if (msg->context_id == context_id) { statusbar->messages = g_slist_remove_link (statusbar->messages, list); gtk_statusbar_msg_free (msg); g_slist_free_1 (list); break; } } } msg = statusbar->messages ? statusbar->messages->data : NULL; g_signal_emit (statusbar, statusbar_signals[SIGNAL_TEXT_POPPED], 0, (guint) (msg ? msg->context_id : 0), msg ? msg->text : NULL); } /** * gtk_statusbar_remove: * @statusbar: a #GtkStatusbar * @context_id: a context identifier * @message_id: a message identifier, as returned by gtk_statusbar_push() * * Forces the removal of a message from a statusbar’s stack. * The exact @context_id and @message_id must be specified. */ void gtk_statusbar_remove (GtkStatusbar *statusbar, guint context_id, guint message_id) { GtkStatusbarMsg *msg; g_return_if_fail (GTK_IS_STATUSBAR (statusbar)); g_return_if_fail (message_id > 0); msg = statusbar->messages ? statusbar->messages->data : NULL; if (msg) { GSList *list; /* care about signal emission if the topmost item is removed */ if (msg->context_id == context_id && msg->message_id == message_id) { gtk_statusbar_pop (statusbar, context_id); return; } for (list = statusbar->messages; list; list = list->next) { msg = list->data; if (msg->context_id == context_id && msg->message_id == message_id) { statusbar->messages = g_slist_remove_link (statusbar->messages, list); gtk_statusbar_msg_free (msg); g_slist_free_1 (list); break; } } } } /** * gtk_statusbar_remove_all: * @statusbar: a #GtkStatusbar * @context_id: a context identifier * * Forces the removal of all messages from a statusbar's * stack with the exact @context_id. */ void gtk_statusbar_remove_all (GtkStatusbar *statusbar, guint context_id) { GtkStatusbarMsg *msg; GSList *prev, *list; g_return_if_fail (GTK_IS_STATUSBAR (statusbar)); if (statusbar->messages == NULL) return; /* We special-case the topmost message at the bottom of this * function: * If we need to pop it, we have to update various state and we want * an up-to-date list of remaining messages in that case. */ prev = statusbar->messages; list = prev->next; while (list != NULL) { msg = list->data; if (msg->context_id == context_id) { prev->next = list->next; gtk_statusbar_msg_free (msg); g_slist_free_1 (list); list = prev->next; } else { prev = list; list = prev->next; } } /* Treat topmost message here */ msg = statusbar->messages->data; if (msg->context_id == context_id) { gtk_statusbar_pop (statusbar, context_id); } } /** * gtk_statusbar_get_message: * @statusbar: a #GtkStatusbar * * Retrieves the contents of the label in #GtkStatusbar. * * Returns: (transfer none): the contents of the statusbar */ const char * gtk_statusbar_get_message (GtkStatusbar *statusbar) { g_return_val_if_fail (GTK_IS_STATUSBAR (statusbar), NULL); return gtk_label_get_label (GTK_LABEL (statusbar->label)); }