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gtk2/gtk/gtkassistant.c
Matthias Clasen 9a65ed9ada window: Derive from GtkWidget 
We want to remove GtkBin and GtkContainer as they don't
provide much useful functionality anymore. This requires
us to move get_request_mode and compute_expand down.

Update the accessible implementation to match, remove
remnants of container implementations in GtkWindow
subclasses, and fix livecycle issues around destroy
vs dispose in GtkAssistant.

After this commit, using gtk_container_add on window
subclasses is not allowed anymore, but adding childing
with <child> in ui files still works.

See #2681
2020-05-04 22:53:08 -04:00

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/*
* GTK - The GIMP Toolkit
* Copyright (C) 1999 Red Hat, Inc.
* Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
* Copyright (C) 2003 Matthias Clasen <mclasen@redhat.com>
* Copyright (C) 2005 Carlos Garnacho Parro <carlosg@gnome.org>
*
* All rights reserved.
*
* 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/>.
*/
/**
* SECTION:gtkassistant
* @Short_description: A widget used to guide users through multi-step operations
* @Title: GtkAssistant
*
* A #GtkAssistant is a widget used to represent a generally complex
* operation splitted in several steps, guiding the user through its
* pages and controlling the page flow to collect the necessary data.
*
* The design of GtkAssistant is that it controls what buttons to show
* and to make sensitive, based on what it knows about the page sequence
* and the [type][GtkAssistantPageType] of each page,
* in addition to state information like the page
* [completion][gtk-assistant-set-page-complete]
* and [committed][gtk-assistant-commit] status.
*
* If you have a case that doesn’t quite fit in #GtkAssistants way of
* handling buttons, you can use the #GTK_ASSISTANT_PAGE_CUSTOM page
* type and handle buttons yourself.
*
* GtkAssistant maintains a #GtkAssistantPage object for each added
* child, which holds additional per-child properties. You
* obtain the #GtkAssistantPage for a child with gtk_assistant_get_page().
*
* # GtkAssistant as GtkBuildable
*
* The GtkAssistant implementation of the #GtkBuildable interface
* exposes the @action_area as internal children with the name
* “action_area”.
*
* To add pages to an assistant in #GtkBuilder, simply add it as a
* child to the GtkAssistant object. If you need to set per-object
* properties, create a #GtkAssistantPage object explicitly, and
* set the child widget as a property on it.
*
* # CSS nodes
*
* GtkAssistant has a single CSS node with the name assistant.
*/
#include "config.h"
#include "gtkassistant.h"
#include "gtkbox.h"
#include "gtkbuildable.h"
#include "gtkbutton.h"
#include "gtkframe.h"
#include "gtkheaderbar.h"
#include "gtkintl.h"
#include "gtkimage.h"
#include "gtklabel.h"
#include "gtklistlistmodelprivate.h"
#include "gtkmaplistmodel.h"
#include "gtkprivate.h"
#include "gtksettings.h"
#include "gtksizegroup.h"
#include "gtksizerequest.h"
#include "gtkstack.h"
#include "gtkstylecontext.h"
#include "gtktypebuiltins.h"
#include "a11y/gtkwindowaccessible.h"
typedef struct _GtkAssistantPageClass GtkAssistantPageClass;
struct _GtkAssistantPage
{
GObject instance;
GtkAssistantPageType type;
guint complete : 1;
guint complete_set : 1;
gchar *title;
GtkWidget *page;
GtkWidget *regular_title;
GtkWidget *current_title;
};
struct _GtkAssistantPageClass
{
GObjectClass parent_class;
};
typedef struct _GtkAssistantPrivate GtkAssistantPrivate;
typedef struct _GtkAssistantClass GtkAssistantClass;
struct _GtkAssistant
{
GtkWindow parent;
};
struct _GtkAssistantClass
{
GtkWindowClass parent_class;
void (* prepare) (GtkAssistant *assistant, GtkWidget *page);
void (* apply) (GtkAssistant *assistant);
void (* close) (GtkAssistant *assistant);
void (* cancel) (GtkAssistant *assistant);
};
struct _GtkAssistantPrivate
{
GtkWidget *cancel;
GtkWidget *forward;
GtkWidget *back;
GtkWidget *apply;
GtkWidget *close;
GtkWidget *last;
GtkWidget *sidebar;
GtkWidget *content;
GtkWidget *action_area;
GtkWidget *headerbar;
gint use_header_bar;
gboolean constructed;
GList *pages;
GSList *visited_pages;
GtkAssistantPage *current_page;
GtkSizeGroup *button_size_group;
GtkSizeGroup *title_size_group;
GtkAssistantPageFunc forward_function;
gpointer forward_function_data;
GDestroyNotify forward_data_destroy;
GListModel *model;
gint extra_buttons;
guint committed : 1;
};
static void gtk_assistant_dispose (GObject *object);
static void gtk_assistant_map (GtkWidget *widget);
static void gtk_assistant_unmap (GtkWidget *widget);
static gboolean gtk_assistant_close_request (GtkWindow *window);
static void gtk_assistant_page_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_assistant_page_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_assistant_buildable_interface_init (GtkBuildableIface *iface);
static void gtk_assistant_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *type);
static gboolean gtk_assistant_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GtkBuildableParser *parser,
gpointer *data);
static void gtk_assistant_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data);
static GList* find_page (GtkAssistant *assistant,
GtkWidget *page);
static void on_assistant_close (GtkWidget *widget,
GtkAssistant *assistant);
static void on_assistant_apply (GtkWidget *widget,
GtkAssistant *assistant);
static void on_assistant_forward (GtkWidget *widget,
GtkAssistant *assistant);
static void on_assistant_back (GtkWidget *widget,
GtkAssistant *assistant);
static void on_assistant_cancel (GtkWidget *widget,
GtkAssistant *assistant);
static void on_assistant_last (GtkWidget *widget,
GtkAssistant *assistant);
static int gtk_assistant_add_page (GtkAssistant *assistant,
GtkAssistantPage *page_info,
gint position);
GType _gtk_assistant_accessible_get_type (void);
enum
{
CHILD_PROP_0,
CHILD_PROP_CHILD,
CHILD_PROP_PAGE_TYPE,
CHILD_PROP_PAGE_TITLE,
CHILD_PROP_PAGE_COMPLETE,
CHILD_PROP_HAS_PADDING
};
G_DEFINE_TYPE (GtkAssistantPage, gtk_assistant_page, G_TYPE_OBJECT)
static void
gtk_assistant_page_init (GtkAssistantPage *page)
{
page->type = GTK_ASSISTANT_PAGE_CONTENT;
}
static void
gtk_assistant_page_finalize (GObject *object)
{
GtkAssistantPage *page = GTK_ASSISTANT_PAGE (object);
g_clear_object (&page->page);
g_free (page->title);
G_OBJECT_CLASS (gtk_assistant_page_parent_class)->finalize (object);
}
static void
gtk_assistant_page_class_init (GtkAssistantPageClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = gtk_assistant_page_finalize;
object_class->get_property = gtk_assistant_page_get_property;
object_class->set_property = gtk_assistant_page_set_property;
/**
* GtkAssistantPage:page-type:
*
* The type of the assistant page.
*/
g_object_class_install_property (object_class,
CHILD_PROP_PAGE_TYPE,
g_param_spec_enum ("page-type",
P_("Page type"),
P_("The type of the assistant page"),
GTK_TYPE_ASSISTANT_PAGE_TYPE,
GTK_ASSISTANT_PAGE_CONTENT,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkAssistantPage:title:
*
* The title of the page.
*/
g_object_class_install_property (object_class,
CHILD_PROP_PAGE_TITLE,
g_param_spec_string ("title",
P_("Page title"),
P_("The title of the assistant page"),
NULL,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkAssistantPage:complete:
*
* Setting the "complete" property to %TRUE marks a page as
* complete (i.e.: all the required fields are filled out). GTK+ uses
* this information to control the sensitivity of the navigation buttons.
*/
g_object_class_install_property (object_class,
CHILD_PROP_PAGE_COMPLETE,
g_param_spec_boolean ("complete",
P_("Page complete"),
P_("Whether all required fields on the page have been filled out"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
CHILD_PROP_CHILD,
g_param_spec_object ("child",
P_("Child widget"),
P_("The content the assistant page"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
enum
{
CANCEL,
PREPARE,
APPLY,
CLOSE,
ESCAPE,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_USE_HEADER_BAR,
PROP_PAGES
};
static guint signals [LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkAssistant, gtk_assistant, GTK_TYPE_WINDOW,
G_ADD_PRIVATE (GtkAssistant)
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_assistant_buildable_interface_init))
static void
set_use_header_bar (GtkAssistant *assistant,
gint use_header_bar)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
if (use_header_bar == -1)
return;
priv->use_header_bar = use_header_bar;
}
static void
gtk_assistant_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
switch (prop_id)
{
case PROP_USE_HEADER_BAR:
set_use_header_bar (assistant, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_assistant_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
switch (prop_id)
{
case PROP_USE_HEADER_BAR:
g_value_set_int (value, priv->use_header_bar);
break;
case PROP_PAGES:
g_value_set_object (value, gtk_assistant_get_pages (assistant));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
add_cb (GtkContainer *container,
GtkWidget *widget,
GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
if (priv->use_header_bar)
g_warning ("Content added to the action area of an assistant using header bars");
gtk_widget_show (GTK_WIDGET (container));
}
static void
apply_use_header_bar (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gtk_widget_set_visible (priv->action_area, !priv->use_header_bar);
gtk_widget_set_visible (priv->headerbar, priv->use_header_bar);
if (!priv->use_header_bar)
gtk_window_set_titlebar (GTK_WINDOW (assistant), NULL);
else
g_signal_connect (priv->action_area, "add", G_CALLBACK (add_cb), assistant);
}
static void
add_to_header_bar (GtkAssistant *assistant,
GtkWidget *child)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
if (child == priv->back || child == priv->cancel)
gtk_header_bar_pack_start (GTK_HEADER_BAR (priv->headerbar), child);
else
gtk_header_bar_pack_end (GTK_HEADER_BAR (priv->headerbar), child);
}
static void
add_action_widgets (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GList *children;
GList *l;
if (priv->use_header_bar)
{
children = gtk_container_get_children (GTK_CONTAINER (priv->action_area));
for (l = children; l != NULL; l = l->next)
{
GtkWidget *child = l->data;
gboolean has_default;
has_default = gtk_widget_has_default (child);
g_object_ref (child);
gtk_container_remove (GTK_CONTAINER (priv->action_area), child);
add_to_header_bar (assistant, child);
g_object_unref (child);
if (has_default)
{
gtk_window_set_default_widget (GTK_WINDOW (assistant), child);
gtk_widget_add_css_class (child, GTK_STYLE_CLASS_SUGGESTED_ACTION);
}
}
g_list_free (children);
}
}
static void
gtk_assistant_constructed (GObject *object)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
G_OBJECT_CLASS (gtk_assistant_parent_class)->constructed (object);
priv->constructed = TRUE;
if (priv->use_header_bar == -1)
priv->use_header_bar = FALSE;
add_action_widgets (assistant);
apply_use_header_bar (assistant);
}
static void
escape_cb (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
/* Do not allow cancelling in the middle of a progress page */
if (priv->current_page &&
(priv->current_page->type != GTK_ASSISTANT_PAGE_PROGRESS ||
priv->current_page->complete))
g_signal_emit (assistant, signals [CANCEL], 0, NULL);
/* don't run any user handlers - this is not a public signal */
g_signal_stop_emission (assistant, signals[ESCAPE], 0);
}
static void
gtk_assistant_finalize (GObject *object)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
if (priv->model)
g_object_remove_weak_pointer (G_OBJECT (priv->model), (gpointer *)&priv->model);
G_OBJECT_CLASS (gtk_assistant_parent_class)->finalize (object);
}
static void
gtk_assistant_class_init (GtkAssistantClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkWindowClass *window_class;
gobject_class = (GObjectClass *) class;
widget_class = (GtkWidgetClass *) class;
window_class = (GtkWindowClass *) class;
gobject_class->dispose = gtk_assistant_dispose;
gobject_class->finalize = gtk_assistant_finalize;
gobject_class->constructed = gtk_assistant_constructed;
gobject_class->set_property = gtk_assistant_set_property;
gobject_class->get_property = gtk_assistant_get_property;
widget_class->map = gtk_assistant_map;
widget_class->unmap = gtk_assistant_unmap;
gtk_widget_class_set_accessible_type (widget_class, _gtk_assistant_accessible_get_type ());
window_class->close_request = gtk_assistant_close_request;
/**
* GtkAssistant::cancel:
* @assistant: the #GtkAssistant
*
* The ::cancel signal is emitted when then the cancel button is clicked.
*/
signals[CANCEL] =
g_signal_new (I_("cancel"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkAssistantClass, cancel),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkAssistant::prepare:
* @assistant: the #GtkAssistant
* @page: the current page
*
* The ::prepare signal is emitted when a new page is set as the
* assistant's current page, before making the new page visible.
*
* A handler for this signal can do any preparations which are
* necessary before showing @page.
*/
signals[PREPARE] =
g_signal_new (I_("prepare"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkAssistantClass, prepare),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, GTK_TYPE_WIDGET);
/**
* GtkAssistant::apply:
* @assistant: the #GtkAssistant
*
* The ::apply signal is emitted when the apply button is clicked.
*
* The default behavior of the #GtkAssistant is to switch to the page
* after the current page, unless the current page is the last one.
*
* A handler for the ::apply signal should carry out the actions for
* which the wizard has collected data. If the action takes a long time
* to complete, you might consider putting a page of type
* %GTK_ASSISTANT_PAGE_PROGRESS after the confirmation page and handle
* this operation within the #GtkAssistant::prepare signal of the progress
* page.
*/
signals[APPLY] =
g_signal_new (I_("apply"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkAssistantClass, apply),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkAssistant::close:
* @assistant: the #GtkAssistant
*
* The ::close signal is emitted either when the close button of
* a summary page is clicked, or when the apply button in the last
* page in the flow (of type %GTK_ASSISTANT_PAGE_CONFIRM) is clicked.
*/
signals[CLOSE] =
g_signal_new (I_("close"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkAssistantClass, close),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
signals[ESCAPE] =
g_signal_new_class_handler (I_("escape"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_CALLBACK (escape_cb),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_Escape, 0,
"escape",
NULL);
/**
* GtkAssistant:use-header-bar:
*
* %TRUE if the assistant uses a #GtkHeaderBar for action buttons
* instead of the action-area.
*
* For technical reasons, this property is declared as an integer
* property, but you should only set it to %TRUE or %FALSE.
*/
g_object_class_install_property (gobject_class,
PROP_USE_HEADER_BAR,
g_param_spec_int ("use-header-bar",
P_("Use Header Bar"),
P_("Use Header Bar for actions."),
-1, 1, -1,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (gobject_class,
PROP_PAGES,
g_param_spec_object ("pages",
P_("Pages"),
P_("The pages of the assistant."),
G_TYPE_LIST_MODEL,
GTK_PARAM_READABLE));
/* Bind class to template
*/
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/libgtk/ui/gtkassistant.ui");
gtk_widget_class_bind_template_child_internal_private (widget_class, GtkAssistant, action_area);
gtk_widget_class_bind_template_child_internal_private (widget_class, GtkAssistant, headerbar);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, content);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, cancel);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, forward);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, back);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, apply);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, close);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, last);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, sidebar);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, button_size_group);
gtk_widget_class_bind_template_child_private (widget_class, GtkAssistant, title_size_group);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_close);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_apply);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_forward);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_back);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_cancel);
gtk_widget_class_bind_template_callback (widget_class, on_assistant_last);
gtk_widget_class_set_css_name (widget_class, I_("assistant"));
}
static gint
default_forward_function (gint current_page, gpointer data)
{
GtkAssistant *assistant = GTK_ASSISTANT (data);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page_info;
GList *page_node;
page_node = g_list_nth (priv->pages, ++current_page);
if (!page_node)
return -1;
page_info = (GtkAssistantPage *) page_node->data;
while (page_node && !gtk_widget_get_visible (page_info->page))
{
page_node = page_node->next;
current_page++;
if (page_node)
page_info = (GtkAssistantPage *) page_node->data;
}
return current_page;
}
static gboolean
last_button_visible (GtkAssistant *assistant, GtkAssistantPage *page)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page_info;
gint count, page_num, n_pages;
if (page == NULL)
return FALSE;
if (page->type != GTK_ASSISTANT_PAGE_CONTENT)
return FALSE;
count = 0;
page_num = g_list_index (priv->pages, page);
n_pages = g_list_length (priv->pages);
page_info = page;
while (page_num >= 0 && page_num < n_pages &&
page_info->type == GTK_ASSISTANT_PAGE_CONTENT &&
(count == 0 || page_info->complete) &&
count < n_pages)
{
page_num = (priv->forward_function) (page_num, priv->forward_function_data);
page_info = g_list_nth_data (priv->pages, page_num);
count++;
}
/* Make the last button visible if we can skip multiple
* pages and end on a confirmation or summary page
*/
if (count > 1 && page_info &&
(page_info->type == GTK_ASSISTANT_PAGE_CONFIRM ||
page_info->type == GTK_ASSISTANT_PAGE_SUMMARY))
return TRUE;
else
return FALSE;
}
static void
update_actions_size (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GList *l;
GtkAssistantPage *page;
gint buttons, page_buttons;
if (!priv->current_page)
return;
/* Some heuristics to find out how many buttons we should
* reserve space for. It is possible to trick this code
* with page forward functions and invisible pages, etc.
*/
buttons = 0;
for (l = priv->pages; l; l = l->next)
{
page = l->data;
if (!gtk_widget_get_visible (page->page))
continue;
page_buttons = 2; /* cancel, forward/apply/close */
if (l != priv->pages)
page_buttons += 1; /* back */
if (last_button_visible (assistant, page))
page_buttons += 1; /* last */
buttons = MAX (buttons, page_buttons);
}
buttons += priv->extra_buttons;
gtk_widget_set_size_request (priv->action_area,
buttons * gtk_widget_get_allocated_width (priv->cancel) + (buttons - 1) * 6,
-1);
}
static void
compute_last_button_state (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gtk_widget_set_sensitive (priv->last, priv->current_page->complete);
if (last_button_visible (assistant, priv->current_page))
gtk_widget_show (priv->last);
else
gtk_widget_hide (priv->last);
}
static void
compute_progress_state (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gint page_num, n_pages;
n_pages = gtk_assistant_get_n_pages (assistant);
page_num = gtk_assistant_get_current_page (assistant);
page_num = (priv->forward_function) (page_num, priv->forward_function_data);
if (page_num >= 0 && page_num < n_pages)
gtk_widget_show (priv->forward);
else
gtk_widget_hide (priv->forward);
}
static void
update_buttons_state (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
if (!priv->current_page)
return;
switch (priv->current_page->type)
{
case GTK_ASSISTANT_PAGE_INTRO:
gtk_widget_set_sensitive (priv->cancel, TRUE);
gtk_widget_set_sensitive (priv->forward, priv->current_page->complete);
gtk_window_set_default_widget (GTK_WINDOW (assistant), priv->forward);
gtk_widget_show (priv->forward);
gtk_widget_hide (priv->back);
gtk_widget_hide (priv->apply);
gtk_widget_hide (priv->close);
compute_last_button_state (assistant);
break;
case GTK_ASSISTANT_PAGE_CONFIRM:
gtk_widget_set_sensitive (priv->cancel, TRUE);
gtk_widget_set_sensitive (priv->back, TRUE);
gtk_widget_set_sensitive (priv->apply, priv->current_page->complete);
gtk_window_set_default_widget (GTK_WINDOW (assistant), priv->apply);
gtk_widget_show (priv->back);
gtk_widget_show (priv->apply);
gtk_widget_hide (priv->forward);
gtk_widget_hide (priv->close);
gtk_widget_hide (priv->last);
break;
case GTK_ASSISTANT_PAGE_CONTENT:
gtk_widget_set_sensitive (priv->cancel, TRUE);
gtk_widget_set_sensitive (priv->back, TRUE);
gtk_widget_set_sensitive (priv->forward, priv->current_page->complete);
gtk_window_set_default_widget (GTK_WINDOW (assistant), priv->forward);
gtk_widget_show (priv->back);
gtk_widget_show (priv->forward);
gtk_widget_hide (priv->apply);
gtk_widget_hide (priv->close);
compute_last_button_state (assistant);
break;
case GTK_ASSISTANT_PAGE_SUMMARY:
gtk_widget_set_sensitive (priv->close, priv->current_page->complete);
gtk_window_set_default_widget (GTK_WINDOW (assistant), priv->close);
gtk_widget_show (priv->close);
gtk_widget_hide (priv->back);
gtk_widget_hide (priv->forward);
gtk_widget_hide (priv->apply);
gtk_widget_hide (priv->last);
break;
case GTK_ASSISTANT_PAGE_PROGRESS:
gtk_widget_set_sensitive (priv->cancel, priv->current_page->complete);
gtk_widget_set_sensitive (priv->back, priv->current_page->complete);
gtk_widget_set_sensitive (priv->forward, priv->current_page->complete);
gtk_window_set_default_widget (GTK_WINDOW (assistant), priv->forward);
gtk_widget_show (priv->back);
gtk_widget_hide (priv->apply);
gtk_widget_hide (priv->close);
gtk_widget_hide (priv->last);
compute_progress_state (assistant);
break;
case GTK_ASSISTANT_PAGE_CUSTOM:
gtk_widget_hide (priv->cancel);
gtk_widget_hide (priv->back);
gtk_widget_hide (priv->forward);
gtk_widget_hide (priv->apply);
gtk_widget_hide (priv->last);
gtk_widget_hide (priv->close);
break;
default:
g_assert_not_reached ();
}
if (priv->committed)
gtk_widget_hide (priv->cancel);
else if (priv->current_page->type == GTK_ASSISTANT_PAGE_SUMMARY ||
priv->current_page->type == GTK_ASSISTANT_PAGE_CUSTOM)
gtk_widget_hide (priv->cancel);
else
gtk_widget_show (priv->cancel);
/* this is quite general, we don't want to
* go back if it's the first page
*/
if (!priv->visited_pages)
gtk_widget_hide (priv->back);
}
static gboolean
update_page_title_state (GtkAssistant *assistant, GList *list)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page, *other;
gboolean visible;
GList *l;
page = list->data;
if (page->title == NULL || page->title[0] == 0)
visible = FALSE;
else
visible = gtk_widget_get_visible (page->page);
if (page == priv->current_page)
{
gtk_widget_set_visible (page->regular_title, FALSE);
gtk_widget_set_visible (page->current_title, visible);
}
else
{
/* If multiple consecutive pages have the same title,
* we only show it once, since it would otherwise look
* silly. We have to be a little careful, since we
* _always_ show the title of the current page.
*/
if (list->prev)
{
other = list->prev->data;
if (g_strcmp0 (page->title, other->title) == 0)
visible = FALSE;
}
for (l = list->next; l; l = l->next)
{
other = l->data;
if (g_strcmp0 (page->title, other->title) != 0)
break;
if (other == priv->current_page)
{
visible = FALSE;
break;
}
}
gtk_widget_set_visible (page->regular_title, visible);
gtk_widget_set_visible (page->current_title, FALSE);
}
return visible;
}
static void
update_title_state (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GList *l;
gboolean show_titles;
show_titles = FALSE;
for (l = priv->pages; l != NULL; l = l->next)
{
if (update_page_title_state (assistant, l))
show_titles = TRUE;
}
gtk_widget_set_visible (priv->sidebar, show_titles);
}
static void
set_current_page (GtkAssistant *assistant,
gint page_num)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
priv->current_page = (GtkAssistantPage *)g_list_nth_data (priv->pages, page_num);
g_signal_emit (assistant, signals [PREPARE], 0, priv->current_page->page);
/* do not continue if the prepare signal handler has already changed the
* current page */
if (priv->current_page != (GtkAssistantPage *)g_list_nth_data (priv->pages, page_num))
return;
update_title_state (assistant);
gtk_window_set_title (GTK_WINDOW (assistant), priv->current_page->title);
gtk_stack_set_visible_child (GTK_STACK (priv->content), priv->current_page->page);
/* update buttons state, flow may have changed */
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
update_buttons_state (assistant);
if (!gtk_widget_child_focus (priv->current_page->page, GTK_DIR_TAB_FORWARD))
{
GtkWidget *button[6];
gint i;
/* find the best button to focus */
button[0] = priv->apply;
button[1] = priv->close;
button[2] = priv->forward;
button[3] = priv->back;
button[4] = priv->cancel;
button[5] = priv->last;
for (i = 0; i < 6; i++)
{
if (gtk_widget_get_visible (button[i]) &&
gtk_widget_get_sensitive (button[i]))
{
gtk_widget_grab_focus (button[i]);
break;
}
}
}
}
static gint
compute_next_step (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page_info;
gint current_page, n_pages, next_page;
current_page = gtk_assistant_get_current_page (assistant);
page_info = priv->current_page;
n_pages = gtk_assistant_get_n_pages (assistant);
next_page = (priv->forward_function) (current_page,
priv->forward_function_data);
if (next_page >= 0 && next_page < n_pages)
{
priv->visited_pages = g_slist_prepend (priv->visited_pages, page_info);
set_current_page (assistant, next_page);
return TRUE;
}
return FALSE;
}
static void
on_assistant_close (GtkWidget *widget,
GtkAssistant *assistant)
{
g_signal_emit (assistant, signals [CLOSE], 0, NULL);
}
static void
on_assistant_apply (GtkWidget *widget,
GtkAssistant *assistant)
{
gboolean success;
g_signal_emit (assistant, signals [APPLY], 0);
success = compute_next_step (assistant);
/* if the assistant hasn't switched to another page, just emit
* the CLOSE signal, it't the last page in the assistant flow
*/
if (!success)
g_signal_emit (assistant, signals [CLOSE], 0);
}
static void
on_assistant_forward (GtkWidget *widget,
GtkAssistant *assistant)
{
gtk_assistant_next_page (assistant);
}
static void
on_assistant_back (GtkWidget *widget,
GtkAssistant *assistant)
{
gtk_assistant_previous_page (assistant);
}
static void
on_assistant_cancel (GtkWidget *widget,
GtkAssistant *assistant)
{
g_signal_emit (assistant, signals [CANCEL], 0, NULL);
}
static void
on_assistant_last (GtkWidget *widget,
GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
while (priv->current_page->type == GTK_ASSISTANT_PAGE_CONTENT &&
priv->current_page->complete)
compute_next_step (assistant);
}
static gboolean
alternative_button_order (GtkAssistant *assistant)
{
gboolean result;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (assistant)),
"gtk-alternative-button-order", &result,
NULL);
return result;
}
static void
on_page_page_notify (GtkWidget *widget,
GParamSpec *arg,
gpointer data)
{
GtkAssistant *assistant = GTK_ASSISTANT (data);
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
{
update_buttons_state (assistant);
update_title_state (assistant);
}
}
static void
on_page_notify (GtkAssistantPage *page,
GParamSpec *arg,
gpointer data)
{
if (page->page)
on_page_page_notify (page->page, arg, data);
}
static void
assistant_remove_page (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page_info;
GList *page_node;
GList *element;
element = find_page (assistant, page);
if (!element)
return;
page_info = element->data;
/* If this is the current page, we need to switch away. */
if (page_info == priv->current_page)
{
if (!compute_next_step (assistant))
{
/* The best we can do at this point is probably to pick
* the first visible page.
*/
page_node = priv->pages;
while (page_node &&
!gtk_widget_get_visible (((GtkAssistantPage *) page_node->data)->page))
page_node = page_node->next;
if (page_node == element)
page_node = page_node->next;
if (page_node)
priv->current_page = page_node->data;
else
priv->current_page = NULL;
}
}
g_signal_handlers_disconnect_by_func (page_info->page, on_page_page_notify, assistant);
g_signal_handlers_disconnect_by_func (page_info, on_page_notify, assistant);
gtk_size_group_remove_widget (priv->title_size_group, page_info->regular_title);
gtk_size_group_remove_widget (priv->title_size_group, page_info->current_title);
gtk_container_remove (GTK_CONTAINER (priv->sidebar), page_info->regular_title);
gtk_container_remove (GTK_CONTAINER (priv->sidebar), page_info->current_title);
priv->pages = g_list_remove_link (priv->pages, element);
priv->visited_pages = g_slist_remove_all (priv->visited_pages, page_info);
g_object_unref (page_info);
g_list_free_1 (element);
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
{
update_buttons_state (assistant);
update_actions_size (assistant);
}
}
static void
gtk_assistant_init (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
priv->pages = NULL;
priv->current_page = NULL;
priv->visited_pages = NULL;
priv->forward_function = default_forward_function;
priv->forward_function_data = assistant;
priv->forward_data_destroy = NULL;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (assistant)),
"gtk-dialogs-use-header", &priv->use_header_bar,
NULL);
gtk_widget_init_template (GTK_WIDGET (assistant));
if (alternative_button_order (assistant))
{
GList *buttons, *l;
/* Reverse the action area children for the alternative button order setting */
buttons = gtk_container_get_children (GTK_CONTAINER (priv->action_area));
for (l = buttons; l; l = l->next)
gtk_box_reorder_child_after (GTK_BOX (priv->action_area), GTK_WIDGET (l->data), NULL);
g_list_free (buttons);
}
}
static void
gtk_assistant_page_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkAssistantPage *page = GTK_ASSISTANT_PAGE (object);
GtkWidget *assistant = NULL;
if (page->page)
assistant = gtk_widget_get_ancestor (page->page, GTK_TYPE_ASSISTANT);
switch (property_id)
{
case CHILD_PROP_CHILD:
g_set_object (&page->page, g_value_get_object (value));
break;
case CHILD_PROP_PAGE_TYPE:
if (page->type != g_value_get_enum (value))
{
page->type = g_value_get_enum (value);
/* backwards compatibility to the era before fixing bug 604289 */
if (page->type == GTK_ASSISTANT_PAGE_SUMMARY && !page->complete_set)
{
page->complete = TRUE;
page->complete_set = FALSE;
}
/* Always set buttons state, a change in a future page
* might change current page buttons
*/
if (assistant)
update_buttons_state (GTK_ASSISTANT (assistant));
g_object_notify (G_OBJECT (page), "page-type");
}
break;
case CHILD_PROP_PAGE_TITLE:
g_free (page->title);
page->title = g_value_dup_string (value);
if (assistant)
{
gtk_label_set_text ((GtkLabel*) page->regular_title, page->title);
gtk_label_set_text ((GtkLabel*) page->current_title, page->title);
update_title_state (GTK_ASSISTANT (assistant));
}
g_object_notify (G_OBJECT (page), "title");
break;
case CHILD_PROP_PAGE_COMPLETE:
if (page->complete != g_value_get_boolean (value))
{
page->complete = g_value_get_boolean (value);
page->complete_set = TRUE;
/* Always set buttons state, a change in a future page
* might change current page buttons
*/
if (assistant)
update_buttons_state (GTK_ASSISTANT (assistant));
g_object_notify (G_OBJECT (page), "complete");
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_assistant_page_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkAssistantPage *page = GTK_ASSISTANT_PAGE (object);
switch (property_id)
{
case CHILD_PROP_CHILD:
g_value_set_object (value, page->page);
break;
case CHILD_PROP_PAGE_TYPE:
g_value_set_enum (value, page->type);
break;
case CHILD_PROP_PAGE_TITLE:
g_value_set_string (value, page->title);
break;
case CHILD_PROP_PAGE_COMPLETE:
g_value_set_boolean (value, page->complete);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_assistant_dispose (GObject *object)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
if (priv->model)
g_list_model_items_changed (G_LIST_MODEL (priv->model), 0, g_list_length (priv->pages), 0);
/* We set current to NULL so that the remove code doesn't try
* to do anything funny
*/
priv->current_page = NULL;
if (priv->content)
{
while (priv->pages)
gtk_assistant_remove_page (assistant, 0);
priv->content = NULL;
}
priv->sidebar = NULL;
priv->action_area = NULL;
if (priv->forward_function)
{
if (priv->forward_function_data &&
priv->forward_data_destroy)
priv->forward_data_destroy (priv->forward_function_data);
priv->forward_function = NULL;
priv->forward_function_data = NULL;
priv->forward_data_destroy = NULL;
}
if (priv->visited_pages)
{
g_slist_free (priv->visited_pages);
priv->visited_pages = NULL;
}
G_OBJECT_CLASS (gtk_assistant_parent_class)->dispose (object);
}
static GList*
find_page (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GList *child = priv->pages;
while (child)
{
GtkAssistantPage *page_info = child->data;
if (page_info->page == page)
return child;
child = child->next;
}
return NULL;
}
static void
gtk_assistant_map (GtkWidget *widget)
{
GtkAssistant *assistant = GTK_ASSISTANT (widget);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GList *page_node;
GtkAssistantPage *page;
gint page_num;
/* if there's no default page, pick the first one */
page = NULL;
page_num = 0;
if (!priv->current_page)
{
page_node = priv->pages;
while (page_node && !gtk_widget_get_visible (((GtkAssistantPage *) page_node->data)->page))
{
page_node = page_node->next;
page_num++;
}
if (page_node)
page = page_node->data;
}
if (page && gtk_widget_get_visible (page->page))
set_current_page (assistant, page_num);
update_buttons_state (assistant);
update_actions_size (assistant);
update_title_state (assistant);
GTK_WIDGET_CLASS (gtk_assistant_parent_class)->map (widget);
}
static void
gtk_assistant_unmap (GtkWidget *widget)
{
GtkAssistant *assistant = GTK_ASSISTANT (widget);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_slist_free (priv->visited_pages);
priv->visited_pages = NULL;
priv->current_page = NULL;
GTK_WIDGET_CLASS (gtk_assistant_parent_class)->unmap (widget);
}
static gboolean
gtk_assistant_close_request (GtkWindow *window)
{
GtkAssistant *assistant = GTK_ASSISTANT (window);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
/* Do not allow cancelling in the middle of a progress page */
if (priv->current_page &&
(priv->current_page->type != GTK_ASSISTANT_PAGE_PROGRESS ||
priv->current_page->complete))
g_signal_emit (assistant, signals [CANCEL], 0, NULL);
return TRUE;
}
/**
* gtk_assistant_new:
*
* Creates a new #GtkAssistant.
*
* Returns: a newly created #GtkAssistant
*/
GtkWidget*
gtk_assistant_new (void)
{
GtkWidget *assistant;
assistant = g_object_new (GTK_TYPE_ASSISTANT, NULL);
return assistant;
}
/**
* gtk_assistant_get_current_page:
* @assistant: a #GtkAssistant
*
* Returns the page number of the current page.
*
* Returns: The index (starting from 0) of the current
* page in the @assistant, or -1 if the @assistant has no pages,
* or no current page.
*/
gint
gtk_assistant_get_current_page (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), -1);
if (!priv->pages || !priv->current_page)
return -1;
return g_list_index (priv->pages, priv->current_page);
}
/**
* gtk_assistant_set_current_page:
* @assistant: a #GtkAssistant
* @page_num: index of the page to switch to, starting from 0.
* If negative, the last page will be used. If greater
* than the number of pages in the @assistant, nothing
* will be done.
*
* Switches the page to @page_num.
*
* Note that this will only be necessary in custom buttons,
* as the @assistant flow can be set with
* gtk_assistant_set_forward_page_func().
*/
void
gtk_assistant_set_current_page (GtkAssistant *assistant,
gint page_num)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
if (page_num >= 0)
page = (GtkAssistantPage *) g_list_nth_data (priv->pages, page_num);
else
{
page = (GtkAssistantPage *) g_list_last (priv->pages)->data;
page_num = g_list_length (priv->pages);
}
g_return_if_fail (page != NULL);
if (priv->current_page == page)
return;
/* only add the page to the visited list if the assistant is mapped,
* if not, just use it as an initial page setting, for the cases where
* the initial page is != to 0
*/
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
priv->visited_pages = g_slist_prepend (priv->visited_pages,
priv->current_page);
set_current_page (assistant, page_num);
}
/**
* gtk_assistant_next_page:
* @assistant: a #GtkAssistant
*
* Navigate to the next page.
*
* It is a programming error to call this function when
* there is no next page.
*
* This function is for use when creating pages of the
* #GTK_ASSISTANT_PAGE_CUSTOM type.
*/
void
gtk_assistant_next_page (GtkAssistant *assistant)
{
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
if (!compute_next_step (assistant))
g_critical ("Page flow is broken.\n"
"You may want to end it with a page of type\n"
"GTK_ASSISTANT_PAGE_CONFIRM or GTK_ASSISTANT_PAGE_SUMMARY");
}
/**
* gtk_assistant_previous_page:
* @assistant: a #GtkAssistant
*
* Navigate to the previous visited page.
*
* It is a programming error to call this function when
* no previous page is available.
*
* This function is for use when creating pages of the
* #GTK_ASSISTANT_PAGE_CUSTOM type.
*/
void
gtk_assistant_previous_page (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page_info;
GSList *page_node;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
/* skip the progress pages when going back */
do
{
page_node = priv->visited_pages;
g_return_if_fail (page_node != NULL);
priv->visited_pages = priv->visited_pages->next;
page_info = (GtkAssistantPage *) page_node->data;
g_slist_free_1 (page_node);
}
while (page_info->type == GTK_ASSISTANT_PAGE_PROGRESS ||
!gtk_widget_get_visible (page_info->page));
set_current_page (assistant, g_list_index (priv->pages, page_info));
}
/**
* gtk_assistant_get_n_pages:
* @assistant: a #GtkAssistant
*
* Returns the number of pages in the @assistant
*
* Returns: the number of pages in the @assistant
*/
gint
gtk_assistant_get_n_pages (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), 0);
return g_list_length (priv->pages);
}
/**
* gtk_assistant_get_nth_page:
* @assistant: a #GtkAssistant
* @page_num: the index of a page in the @assistant,
* or -1 to get the last page
*
* Returns the child widget contained in page number @page_num.
*
* Returns: (nullable) (transfer none): the child widget, or %NULL
* if @page_num is out of bounds
*/
GtkWidget*
gtk_assistant_get_nth_page (GtkAssistant *assistant,
gint page_num)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkAssistantPage *page;
GList *elem;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), NULL);
g_return_val_if_fail (page_num >= -1, NULL);
if (page_num == -1)
elem = g_list_last (priv->pages);
else
elem = g_list_nth (priv->pages, page_num);
if (!elem)
return NULL;
page = (GtkAssistantPage *) elem->data;
return page->page;
}
/**
* gtk_assistant_prepend_page:
* @assistant: a #GtkAssistant
* @page: a #GtkWidget
*
* Prepends a page to the @assistant.
*
* Returns: the index (starting at 0) of the inserted page
*/
gint
gtk_assistant_prepend_page (GtkAssistant *assistant,
GtkWidget *page)
{
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), 0);
g_return_val_if_fail (GTK_IS_WIDGET (page), 0);
return gtk_assistant_insert_page (assistant, page, 0);
}
/**
* gtk_assistant_append_page:
* @assistant: a #GtkAssistant
* @page: a #GtkWidget
*
* Appends a page to the @assistant.
*
* Returns: the index (starting at 0) of the inserted page
*/
gint
gtk_assistant_append_page (GtkAssistant *assistant,
GtkWidget *page)
{
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), 0);
g_return_val_if_fail (GTK_IS_WIDGET (page), 0);
return gtk_assistant_insert_page (assistant, page, -1);
}
/**
* gtk_assistant_insert_page:
* @assistant: a #GtkAssistant
* @page: a #GtkWidget
* @position: the index (starting at 0) at which to insert the page,
* or -1 to append the page to the @assistant
*
* Inserts a page in the @assistant at a given position.
*
* Returns: the index (starting from 0) of the inserted page
*/
gint
gtk_assistant_insert_page (GtkAssistant *assistant,
GtkWidget *page,
gint position)
{
GtkAssistantPage *page_info;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), 0);
g_return_val_if_fail (GTK_IS_WIDGET (page), 0);
g_return_val_if_fail (gtk_widget_get_parent (page) == NULL, 0);
page_info = g_object_new (GTK_TYPE_ASSISTANT_PAGE, NULL);
page_info->page = g_object_ref (page);
return gtk_assistant_add_page (assistant, page_info, position);
g_object_unref (page_info);
}
static int
gtk_assistant_add_page (GtkAssistant *assistant,
GtkAssistantPage *page_info,
gint position)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gint n_pages;
GtkWidget *sibling;
char *name;
page_info->regular_title = gtk_label_new (page_info->title);
page_info->current_title = gtk_label_new (page_info->title);
gtk_label_set_xalign (GTK_LABEL (page_info->regular_title), 0.0);
gtk_label_set_xalign (GTK_LABEL (page_info->current_title), 0.0);
gtk_widget_show (page_info->regular_title);
gtk_widget_hide (page_info->current_title);
gtk_widget_add_css_class (page_info->current_title, GTK_STYLE_CLASS_HIGHLIGHT);
gtk_size_group_add_widget (priv->title_size_group, page_info->regular_title);
gtk_size_group_add_widget (priv->title_size_group, page_info->current_title);
g_signal_connect (G_OBJECT (page_info->page), "notify::visible",
G_CALLBACK (on_page_page_notify), assistant);
g_signal_connect (G_OBJECT (page_info), "notify::page-title",
G_CALLBACK (on_page_notify), assistant);
g_signal_connect (G_OBJECT (page_info), "notify::page-type",
G_CALLBACK (on_page_notify), assistant);
n_pages = g_list_length (priv->pages);
if (position < 0 || position > n_pages)
position = n_pages;
priv->pages = g_list_insert (priv->pages, g_object_ref (page_info), position);
if (position == 0)
sibling = NULL;
else
{
int i;
sibling = gtk_widget_get_first_child (priv->sidebar);
for (i = 1; i < 2 * position; i++)
sibling = gtk_widget_get_next_sibling (sibling);
}
gtk_box_insert_child_after (GTK_BOX (priv->sidebar), page_info->current_title, sibling);
gtk_box_insert_child_after (GTK_BOX (priv->sidebar), page_info->regular_title, sibling);
name = g_strdup_printf ("%p", page_info->page);
gtk_stack_add_named (GTK_STACK (priv->content), page_info->page, name);
g_free (name);
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
{
update_buttons_state (assistant);
update_actions_size (assistant);
}
if (priv->model)
g_list_model_items_changed (priv->model, position, 0, 1);
return position;
}
/**
* gtk_assistant_remove_page:
* @assistant: a #GtkAssistant
* @page_num: the index of a page in the @assistant,
* or -1 to remove the last page
*
* Removes the @page_num’s page from @assistant.
*/
void
gtk_assistant_remove_page (GtkAssistant *assistant,
gint page_num)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
GtkWidget *page;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
page = gtk_assistant_get_nth_page (assistant, page_num);
if (page)
assistant_remove_page (assistant, page);
if (priv->model)
g_list_model_items_changed (priv->model, page_num, 1, 0);
}
/**
* gtk_assistant_set_forward_page_func:
* @assistant: a #GtkAssistant
* @page_func: (allow-none): the #GtkAssistantPageFunc, or %NULL
* to use the default one
* @data: user data for @page_func
* @destroy: destroy notifier for @data
*
* Sets the page forwarding function to be @page_func.
*
* This function will be used to determine what will be
* the next page when the user presses the forward button.
* Setting @page_func to %NULL will make the assistant to
* use the default forward function, which just goes to the
* next visible page.
*/
void
gtk_assistant_set_forward_page_func (GtkAssistant *assistant,
GtkAssistantPageFunc page_func,
gpointer data,
GDestroyNotify destroy)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
if (priv->forward_data_destroy &&
priv->forward_function_data)
(*priv->forward_data_destroy) (priv->forward_function_data);
if (page_func)
{
priv->forward_function = page_func;
priv->forward_function_data = data;
priv->forward_data_destroy = destroy;
}
else
{
priv->forward_function = default_forward_function;
priv->forward_function_data = assistant;
priv->forward_data_destroy = NULL;
}
/* Page flow has possibly changed, so the
* buttons state might need to change too
*/
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
update_buttons_state (assistant);
}
static void
add_to_action_area (GtkAssistant *assistant,
GtkWidget *child)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
gtk_widget_set_valign (child, GTK_ALIGN_BASELINE);
gtk_container_add (GTK_CONTAINER (priv->action_area), child);
}
/**
* gtk_assistant_add_action_widget:
* @assistant: a #GtkAssistant
* @child: a #GtkWidget
*
* Adds a widget to the action area of a #GtkAssistant.
*/
void
gtk_assistant_add_action_widget (GtkAssistant *assistant,
GtkWidget *child)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (child));
if (GTK_IS_BUTTON (child))
{
gtk_size_group_add_widget (priv->button_size_group, child);
priv->extra_buttons += 1;
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
update_actions_size (assistant);
}
if (priv->constructed && priv->use_header_bar)
add_to_header_bar (assistant, child);
else
add_to_action_area (assistant, child);
}
/**
* gtk_assistant_remove_action_widget:
* @assistant: a #GtkAssistant
* @child: a #GtkWidget
*
* Removes a widget from the action area of a #GtkAssistant.
*/
void
gtk_assistant_remove_action_widget (GtkAssistant *assistant,
GtkWidget *child)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (child));
if (GTK_IS_BUTTON (child))
{
gtk_size_group_remove_widget (priv->button_size_group, child);
priv->extra_buttons -= 1;
if (gtk_widget_get_mapped (GTK_WIDGET (assistant)))
update_actions_size (assistant);
}
gtk_container_remove (GTK_CONTAINER (priv->action_area), child);
}
/**
* gtk_assistant_set_page_title:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
* @title: the new title for @page
*
* Sets a title for @page.
*
* The title is displayed in the header area of the assistant
* when @page is the current page.
*/
void
gtk_assistant_set_page_title (GtkAssistant *assistant,
GtkWidget *page,
const gchar *title)
{
GtkAssistantPage *page_info;
GList *child;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (page));
child = find_page (assistant, page);
g_return_if_fail (child != NULL);
page_info = (GtkAssistantPage*) child->data;
g_object_set (page_info, "title", title, NULL);
}
/**
* gtk_assistant_get_page_title:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
*
* Gets the title for @page.
*
* Returns: the title for @page
*/
const gchar*
gtk_assistant_get_page_title (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPage *page_info;
GList *child;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (page), NULL);
child = find_page (assistant, page);
g_return_val_if_fail (child != NULL, NULL);
page_info = (GtkAssistantPage*) child->data;
return page_info->title;
}
/**
* gtk_assistant_set_page_type:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
* @type: the new type for @page
*
* Sets the page type for @page.
*
* The page type determines the page behavior in the @assistant.
*/
void
gtk_assistant_set_page_type (GtkAssistant *assistant,
GtkWidget *page,
GtkAssistantPageType type)
{
GtkAssistantPage *page_info;
GList *child;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (page));
child = find_page (assistant, page);
g_return_if_fail (child != NULL);
page_info = (GtkAssistantPage*) child->data;
g_object_set (page_info, "page-type", type, NULL);
}
/**
* gtk_assistant_get_page_type:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
*
* Gets the page type of @page.
*
* Returns: the page type of @page
*/
GtkAssistantPageType
gtk_assistant_get_page_type (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPage *page_info;
GList *child;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), GTK_ASSISTANT_PAGE_CONTENT);
g_return_val_if_fail (GTK_IS_WIDGET (page), GTK_ASSISTANT_PAGE_CONTENT);
child = find_page (assistant, page);
g_return_val_if_fail (child != NULL, GTK_ASSISTANT_PAGE_CONTENT);
page_info = (GtkAssistantPage*) child->data;
return page_info->type;
}
/**
* gtk_assistant_set_page_complete:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
* @complete: the completeness status of the page
*
* Sets whether @page contents are complete.
*
* This will make @assistant update the buttons state
* to be able to continue the task.
*/
void
gtk_assistant_set_page_complete (GtkAssistant *assistant,
GtkWidget *page,
gboolean complete)
{
GtkAssistantPage *page_info;
GList *child;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (page));
child = find_page (assistant, page);
g_return_if_fail (child != NULL);
page_info = (GtkAssistantPage*) child->data;
g_object_set (page_info, "complete", complete, NULL);
}
/**
* gtk_assistant_get_page_complete:
* @assistant: a #GtkAssistant
* @page: a page of @assistant
*
* Gets whether @page is complete.
*
* Returns: %TRUE if @page is complete.
*/
gboolean
gtk_assistant_get_page_complete (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPage *page_info;
GList *child;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (page), FALSE);
child = find_page (assistant, page);
g_return_val_if_fail (child != NULL, FALSE);
page_info = (GtkAssistantPage*) child->data;
return page_info->complete;
}
/**
* gtk_assistant_update_buttons_state:
* @assistant: a #GtkAssistant
*
* Forces @assistant to recompute the buttons state.
*
* GTK+ automatically takes care of this in most situations,
* e.g. when the user goes to a different page, or when the
* visibility or completeness of a page changes.
*
* One situation where it can be necessary to call this
* function is when changing a value on the current page
* affects the future page flow of the assistant.
*/
void
gtk_assistant_update_buttons_state (GtkAssistant *assistant)
{
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
update_buttons_state (assistant);
}
/**
* gtk_assistant_commit:
* @assistant: a #GtkAssistant
*
* Erases the visited page history so the back button is not
* shown on the current page, and removes the cancel button
* from subsequent pages.
*
* Use this when the information provided up to the current
* page is hereafter deemed permanent and cannot be modified
* or undone. For example, showing a progress page to track
* a long-running, unreversible operation after the user has
* clicked apply on a confirmation page.
*/
void
gtk_assistant_commit (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_slist_free (priv->visited_pages);
priv->visited_pages = NULL;
priv->committed = TRUE;
update_buttons_state (assistant);
}
/* accessible implementation */
/* dummy typedefs */
typedef GtkWindowAccessible GtkAssistantAccessible;
typedef GtkWindowAccessibleClass GtkAssistantAccessibleClass;
G_DEFINE_TYPE (GtkAssistantAccessible, _gtk_assistant_accessible, GTK_TYPE_WINDOW_ACCESSIBLE);
static gint
gtk_assistant_accessible_get_n_children (AtkObject *accessible)
{
GtkAssistantPrivate *priv;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return 0;
priv = gtk_assistant_get_instance_private (GTK_ASSISTANT (widget));
return g_list_length (priv->pages) + 2;
}
static AtkObject *
gtk_assistant_accessible_ref_child (AtkObject *accessible,
gint index)
{
GtkAssistant *assistant;
GtkAssistantPrivate *priv;
GtkWidget *widget, *child;
gint n_pages;
AtkObject *obj;
const gchar *title;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return NULL;
assistant = GTK_ASSISTANT (widget);
priv = gtk_assistant_get_instance_private (assistant);
n_pages = g_list_length (priv->pages);
if (index < 0)
return NULL;
else if (index < n_pages)
{
GtkAssistantPage *page = g_list_nth_data (priv->pages, index);
child = page->page;
title = gtk_assistant_get_page_title (assistant, child);
}
else if (index == n_pages)
{
child = priv->action_area;
title = NULL;
}
else if (index == n_pages + 1)
{
child = priv->headerbar;
title = NULL;
}
else
return NULL;
obj = gtk_widget_get_accessible (child);
if (title)
atk_object_set_name (obj, title);
return g_object_ref (obj);
}
static void
_gtk_assistant_accessible_class_init (GtkAssistantAccessibleClass *klass)
{
AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
atk_class->get_n_children = gtk_assistant_accessible_get_n_children;
atk_class->ref_child = gtk_assistant_accessible_ref_child;
}
static void
_gtk_assistant_accessible_init (GtkAssistantAccessible *self)
{
}
/* buildable implementation */
static GtkBuildableIface *parent_buildable_iface;
static void
gtk_assistant_buildable_interface_init (GtkBuildableIface *iface)
{
parent_buildable_iface = g_type_interface_peek_parent (iface);
iface->custom_tag_start = gtk_assistant_buildable_custom_tag_start;
iface->custom_finished = gtk_assistant_buildable_custom_finished;
iface->add_child = gtk_assistant_buildable_add_child;
}
static void
gtk_assistant_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *type)
{
if (GTK_IS_ASSISTANT_PAGE (child))
gtk_assistant_add_page (GTK_ASSISTANT (buildable), GTK_ASSISTANT_PAGE (child), -1);
else if (type && g_str_equal (type, "titlebar"))
{
GtkAssistant *assistant = GTK_ASSISTANT (buildable);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
priv->headerbar = GTK_WIDGET (child);
gtk_window_set_titlebar (GTK_WINDOW (buildable), priv->headerbar);
}
else
parent_buildable_iface->add_child (buildable, builder, child, type);
}
gboolean
gtk_assistant_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GtkBuildableParser *parser,
gpointer *data)
{
return parent_buildable_iface->custom_tag_start (buildable, builder, child,
tagname, parser, data);
}
static void
gtk_assistant_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data)
{
parent_buildable_iface->custom_finished (buildable, builder, child,
tagname, user_data);
}
/**
* gtk_assistant_get_page:
* @assistant: a #GtkAssistant
* @child: a child of @assistant
*
* Returns the #GtkAssistantPage object for @child.
*
* Returns: (transfer none): the #GtkAssistantPage for @child
*/
GtkAssistantPage *
gtk_assistant_get_page (GtkAssistant *assistant,
GtkWidget *child)
{
GList *page_info = find_page (assistant, child);
return (GtkAssistantPage *) (page_info ? page_info->data : NULL);
}
/**
* gtk_assistant_page_get_child:
* @page: a #GtkAssistantPage
*
* Returns the child to which @page belongs.
*
* Returns: (transfer none): the child to which @page belongs
*/
GtkWidget *
gtk_assistant_page_get_child (GtkAssistantPage *page)
{
return page->page;
}
#define GTK_TYPE_ASSISTANT_PAGES (gtk_assistant_pages_get_type ())
G_DECLARE_FINAL_TYPE (GtkAssistantPages, gtk_assistant_pages, GTK, ASSISTANT_PAGES, GObject)
struct _GtkAssistantPages
{
GObject parent_instance;
GtkAssistant *assistant;
};
struct _GtkAssistantPagesClass
{
GObjectClass parent_class;
};
static GType
gtk_assistant_pages_get_item_type (GListModel *model)
{
return GTK_TYPE_ASSISTANT_PAGE;
}
static guint
gtk_assistant_pages_get_n_items (GListModel *model)
{
GtkAssistantPages *pages = GTK_ASSISTANT_PAGES (model);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (pages->assistant);
return g_list_length (priv->pages);
}
static gpointer
gtk_assistant_pages_get_item (GListModel *model,
guint position)
{
GtkAssistantPages *pages = GTK_ASSISTANT_PAGES (model);
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (pages->assistant);
GtkAssistantPage *page;
page = g_list_nth_data (priv->pages, position);
return g_object_ref (page);
}
static void
gtk_assistant_pages_list_model_init (GListModelInterface *iface)
{
iface->get_item_type = gtk_assistant_pages_get_item_type;
iface->get_n_items = gtk_assistant_pages_get_n_items;
iface->get_item = gtk_assistant_pages_get_item;
}
G_DEFINE_TYPE_WITH_CODE (GtkAssistantPages, gtk_assistant_pages, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, gtk_assistant_pages_list_model_init))
static void
gtk_assistant_pages_init (GtkAssistantPages *pages)
{
}
static void
gtk_assistant_pages_class_init (GtkAssistantPagesClass *class)
{
}
static GtkAssistantPages *
gtk_assistant_pages_new (GtkAssistant *assistant)
{
GtkAssistantPages *pages;
pages = g_object_new (GTK_TYPE_ASSISTANT_PAGES, NULL);
pages->assistant = assistant;
return pages;
}
/**
* gtk_assistant_get_pages:
* @assistant: a #GtkAssistant
*
* Gets a list model of the assistant pages.
*
* Returns: (transfer full) (attributes element-type=GtkAssistantPage): A list model of the pages.
*/
GListModel *
gtk_assistant_get_pages (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = gtk_assistant_get_instance_private (assistant);
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), NULL);
if (priv->model)
return g_object_ref (priv->model);
priv->model = G_LIST_MODEL (gtk_assistant_pages_new (assistant));
g_object_add_weak_pointer (G_OBJECT (priv->model), (gpointer *)&priv->model);
return priv->model;
}
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