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gtk2/gtk/gtkassistant.c
Matthias Clasen 3df4d1440a assistant: Remove weak pointer in finalize 
Otherwise, bad things can happen later, if
somebody holds onto the list model.
2019-02-21 00:31:17 -05:00

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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 "gtkbindings.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 "gtkstack.h"
#include "gtkprivate.h"
#include "gtksettings.h"
#include "gtksizegroup.h"
#include "gtksizerequest.h"
#include "gtktypebuiltins.h"
#include "gtklistlistmodelprivate.h"
#include "gtkmaplistmodel.h"
#include "a11y/gtkwindowaccessible.h"
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;
};
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_destroy (GtkWidget *widget);
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_add (GtkContainer *container,
GtkWidget *page);
static void gtk_assistant_remove (GtkContainer *container,
GtkWidget *page);
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,
GMarkupParser *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 void assistant_remove_page_cb (GtkContainer *container,
GtkWidget *page,
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
if (priv->use_header_bar)
g_warning ("Content added to the action area of a assistant using header bars");
gtk_widget_show (GTK_WIDGET (container));
}
static void
apply_use_header_bar (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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_widget_grab_default (child);
gtk_style_context_add_class (gtk_widget_get_style_context (child), GTK_STYLE_CLASS_SUGGESTED_ACTION);
}
}
g_list_free (children);
}
}
static void
gtk_assistant_constructed (GObject *object)
{
GtkAssistant *assistant = GTK_ASSISTANT (object);
GtkAssistantPrivate *priv = assistant->priv;
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 = assistant->priv;
/* 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 = assistant->priv;
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;
GtkContainerClass *container_class;
GtkWindowClass *window_class;
GtkBindingSet *binding_set;
gobject_class = (GObjectClass *) class;
widget_class = (GtkWidgetClass *) class;
container_class = (GtkContainerClass *) class;
window_class = (GtkWindowClass *) class;
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->destroy = gtk_assistant_destroy;
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 ());
container_class->add = gtk_assistant_add;
container_class->remove = gtk_assistant_remove;
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,
g_cclosure_marshal_VOID__VOID,
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,
g_cclosure_marshal_VOID__OBJECT,
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,
g_cclosure_marshal_VOID__VOID,
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,
g_cclosure_marshal_VOID__VOID,
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,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
binding_set = gtk_binding_set_by_class (class);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0, "escape", 0);
/**
* 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 assitant."),
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, assistant_remove_page_cb);
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;
GtkAssistantPrivate *priv;
GtkAssistantPage *page_info;
GList *page_node;
assistant = GTK_ASSISTANT (data);
priv = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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_widget_grab_default (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_widget_grab_default (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_widget_grab_default (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_widget_grab_default (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_widget_grab_default (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)
{
GtkAssistantPage *page, *other;
GtkAssistantPrivate *priv = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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_cb (GtkContainer *container,
GtkWidget *page,
GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = assistant->priv;
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;
assistant->priv = gtk_assistant_get_instance_private (assistant);
priv = assistant->priv;
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_destroy (GtkWidget *widget)
{
GtkAssistant *assistant = GTK_ASSISTANT (widget);
GtkAssistantPrivate *priv = assistant->priv;
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)
{
GList *children, *l;
children = gtk_container_get_children (GTK_CONTAINER (priv->content));
for (l = children; l; l = l->next)
{
GtkWidget *page = l->data;
gtk_container_remove (GTK_CONTAINER (priv->content), page);
}
g_list_free (children);
/* Our GtkAssistantPage list should be empty now. */
g_warn_if_fail (priv->pages == NULL);
priv->content = NULL;
}
if (priv->sidebar)
priv->sidebar = NULL;
if (priv->action_area)
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;
}
gtk_window_set_titlebar (GTK_WINDOW (widget), NULL);
GTK_WIDGET_CLASS (gtk_assistant_parent_class)->destroy (widget);
}
static GList*
find_page (GtkAssistant *assistant,
GtkWidget *page)
{
GtkAssistantPrivate *priv = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
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 = assistant->priv;
/* 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;
}
static void
gtk_assistant_add (GtkContainer *container,
GtkWidget *page)
{
/* A bit tricky here, GtkAssistant doesnt exactly play by
* the rules by allowing gtk_container_add() to insert pages.
*
* For the first invocation (from the builder template invocation),
* let's make sure we add the actual direct container content properly.
*/
if (!GTK_ASSISTANT (container)->priv->constructed)
{
gtk_widget_set_parent (page, GTK_WIDGET (container));
_gtk_bin_set_child (GTK_BIN (container), page);
return;
}
g_print ("after template init\n");
gtk_assistant_append_page (GTK_ASSISTANT (container), page);
}
static void
gtk_assistant_remove (GtkContainer *container,
GtkWidget *page)
{
GtkAssistant *assistant = (GtkAssistant*) container;
/* Forward this removal to the content stack */
if (gtk_widget_get_parent (page) == assistant->priv->content)
{
gtk_container_remove (GTK_CONTAINER (assistant->priv->content), page);
}
else
{
GTK_CONTAINER_CLASS (gtk_assistant_parent_class)->remove (container, page);
}
}
/**
* 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;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), -1);
priv = assistant->priv;
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;
GtkAssistantPage *page;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
priv = assistant->priv;
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;
GtkAssistantPage *page_info;
GSList *page_node;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
priv = assistant->priv;
/* 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;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), 0);
priv = assistant->priv;
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;
GtkAssistantPage *page;
GList *elem;
g_return_val_if_fail (GTK_IS_ASSISTANT (assistant), NULL);
g_return_val_if_fail (page_num >= -1, NULL);
priv = assistant->priv;
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);
g_return_val_if_fail (!gtk_widget_is_toplevel (page), 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 = assistant->priv;
gint n_pages;
GtkStyleContext *context;
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);
context = gtk_widget_get_style_context (page_info->current_title);
gtk_style_context_add_class (context, 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)
{
GtkWidget *page;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
page = gtk_assistant_get_nth_page (assistant, page_num);
if (page)
gtk_container_remove (GTK_CONTAINER (assistant), page);
if (assistant->priv->model)
g_list_model_items_changed (assistant->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;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
priv = assistant->priv;
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 = assistant->priv;
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;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (child));
priv = assistant->priv;
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;
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_return_if_fail (GTK_IS_WIDGET (child));
priv = assistant->priv;
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)
{
g_return_if_fail (GTK_IS_ASSISTANT (assistant));
g_slist_free (assistant->priv->visited_pages);
assistant->priv->visited_pages = NULL;
assistant->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)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return 0;
return g_list_length (GTK_ASSISTANT (widget)->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 = assistant->priv;
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);
assistant->priv->headerbar = GTK_WIDGET (child);
gtk_window_set_titlebar (GTK_WINDOW (buildable), assistant->priv->headerbar);
}
else if (GTK_IS_WIDGET (child))
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
else
g_warning ("Can't add a child of type '%s' to '%s'", G_OBJECT_TYPE_NAME (child), G_OBJECT_TYPE_NAME (buildable));
}
gboolean
gtk_assistant_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *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);
return g_list_length (pages->assistant->priv->pages);
}
static gpointer
gtk_assistant_pages_get_item (GListModel *model,
guint position)
{
GtkAssistantPages *pages = GTK_ASSISTANT_PAGES (model);
GtkAssistantPage *page;
page = g_list_nth_data (pages->assistant->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): A list model of the pages.
*/
GListModel *
gtk_assistant_get_pages (GtkAssistant *assistant)
{
GtkAssistantPrivate *priv = assistant->priv;
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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