gtk2/gtk/gtkstatusbar.c
Matthias Clasen 45bcffd637 statusbar: Don't use a frame
This frame serves no purpose anymore, and now that frames
draw frames, it shows up annoyingly.
2020-04-18 17:29:13 -04:00

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/* 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 <http://www.gnu.org/licenses/>.
*/
/*
* 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"
#include "a11y/gtkstatusbaraccessible.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 bars stack is the one that will currently be displayed.
*
* Any messages added to a statusbars 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 bars 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 gchar *text);
void (*text_popped) (GtkStatusbar *statusbar,
guint context_id,
const gchar *text);
};
struct _GtkStatusbarMsg
{
gchar *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 gchar *text);
static void gtk_statusbar_destroy (GtkWidget *widget);
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_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;
widget_class->destroy = gtk_statusbar_destroy;
widget_class->grab_focus = gtk_widget_grab_focus_none;
widget_class->focus = gtk_widget_focus_child;
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_accessible_type (widget_class, GTK_TYPE_STATUSBAR_ACCESSIBLE);
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 gchar *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 gchar *context_description)
{
gchar *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 datas */
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 gchar *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 messages context id, as returned by
* gtk_statusbar_get_context_id()
* @text: the message to add to the statusbar
*
* Pushes a new message onto a statusbars stack.
*
* Returns: a message id that can be used with
* gtk_statusbar_remove().
*/
guint
gtk_statusbar_push (GtkStatusbar *statusbar,
guint context_id,
const gchar *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 #GtkStatusbars 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 statusbars 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);
}
}
/* < private >
* gtk_statusbar_get_message_area:
* @statusbar: a #GtkStatusbar
*
* Retrieves the box containing the label widget.
*
* Returns: (type Gtk.Box) (transfer none): a #GtkBox
*/
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));
}
static void
gtk_statusbar_destroy (GtkWidget *widget)
{
GtkStatusbar *statusbar = GTK_STATUSBAR (widget);
g_slist_free_full (statusbar->messages, (GDestroyNotify) gtk_statusbar_msg_free);
statusbar->messages = NULL;
g_slist_free_full (statusbar->keys, g_free);
statusbar->keys = NULL;
GTK_WIDGET_CLASS (gtk_statusbar_parent_class)->destroy (widget);
}