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gtk2/gtk/gtkstack.c
Benjamin Otte 6df2023e9d stack: Use new snapshot transforms
2019-02-21 19:47:28 +01:00

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/*
* Copyright (c) 2013 Red Hat, Inc.
*
* This program 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 program 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 program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author: Alexander Larsson <alexl@redhat.com>
*
*/
#include "config.h"
#include <gtk/gtk.h>
#include "gtkstack.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkcontainerprivate.h"
#include "gtkprogresstrackerprivate.h"
#include "gtksettingsprivate.h"
#include "gtksnapshot.h"
#include "gtkwidgetprivate.h"
#include "gtksingleselection.h"
#include "gtklistlistmodelprivate.h"
#include "a11y/gtkstackaccessible.h"
#include "a11y/gtkstackaccessibleprivate.h"
#include <math.h>
#include <string.h>
/**
* SECTION:gtkstack
* @Short_description: A stacking container
* @Title: GtkStack
* @See_also: #GtkNotebook, #GtkStackSwitcher
*
* The GtkStack widget is a container which only shows
* one of its children at a time. In contrast to GtkNotebook,
* GtkStack does not provide a means for users to change the
* visible child. Instead, the #GtkStackSwitcher widget can be
* used with GtkStack to provide this functionality.
*
* Transitions between pages can be animated as slides or
* fades. This can be controlled with gtk_stack_set_transition_type().
* These animations respect the #GtkSettings:gtk-enable-animations
* setting.
*
* GtkStack maintains a #GtkStackPage object for each added
* child, which holds additional per-child properties. You
* obtain the #GtkStackPage for a child with gtk_stack_get_page().
*
* # GtkStack as GtkBuildable
*
* To set child-specific properties in a .ui file, create GtkStackPage
* objects explictly, and set the child widget as a property on it:
* |[
* <object class="GtkStack" id="stack">
* <child>
* <object class="GtkStackPage">
* <property name="name">page1</property>
* <property name="title">In the beginning…</property>
* <property name="child">
* <object class="GtkLabel">
* <property name="label">It was dark</property>
* </object>
* </property>
* </object>
* </child>
* ]|
*
* # CSS nodes
*
* GtkStack has a single CSS node named stack.
*/
/**
* GtkStackTransitionType:
* @GTK_STACK_TRANSITION_TYPE_NONE: No transition
* @GTK_STACK_TRANSITION_TYPE_CROSSFADE: A cross-fade
* @GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT: Slide from left to right
* @GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT: Slide from right to left
* @GTK_STACK_TRANSITION_TYPE_SLIDE_UP: Slide from bottom up
* @GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN: Slide from top down
* @GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT: Slide from left or right according to the children order
* @GTK_STACK_TRANSITION_TYPE_SLIDE_UP_DOWN: Slide from top down or bottom up according to the order
* @GTK_STACK_TRANSITION_TYPE_OVER_UP: Cover the old page by sliding up
* @GTK_STACK_TRANSITION_TYPE_OVER_DOWN: Cover the old page by sliding down
* @GTK_STACK_TRANSITION_TYPE_OVER_LEFT: Cover the old page by sliding to the left
* @GTK_STACK_TRANSITION_TYPE_OVER_RIGHT: Cover the old page by sliding to the right
* @GTK_STACK_TRANSITION_TYPE_UNDER_UP: Uncover the new page by sliding up
* @GTK_STACK_TRANSITION_TYPE_UNDER_DOWN: Uncover the new page by sliding down
* @GTK_STACK_TRANSITION_TYPE_UNDER_LEFT: Uncover the new page by sliding to the left
* @GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT: Uncover the new page by sliding to the right
* @GTK_STACK_TRANSITION_TYPE_OVER_UP_DOWN: Cover the old page sliding up or uncover the new page sliding down, according to order
* @GTK_STACK_TRANSITION_TYPE_OVER_DOWN_UP: Cover the old page sliding down or uncover the new page sliding up, according to order
* @GTK_STACK_TRANSITION_TYPE_OVER_LEFT_RIGHT: Cover the old page sliding left or uncover the new page sliding right, according to order
* @GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT: Cover the old page sliding right or uncover the new page sliding left, according to order
*
* These enumeration values describe the possible transitions
* between pages in a #GtkStack widget.
*
* New values may be added to this enumeration over time.
*/
/* TODO:
* filter events out events to the last_child widget during transitions
*/
typedef struct {
GList *children;
GtkStackPage *visible_child;
gboolean hhomogeneous;
gboolean vhomogeneous;
GtkStackTransitionType transition_type;
guint transition_duration;
GtkStackPage *last_visible_child;
GskRenderNode *last_visible_node;
GtkAllocation last_visible_surface_allocation;
guint tick_id;
GtkProgressTracker tracker;
gboolean first_frame_skipped;
gint last_visible_widget_width;
gint last_visible_widget_height;
gboolean interpolate_size;
GtkStackTransitionType active_transition_type;
GtkSelectionModel *pages;
} GtkStackPrivate;
static void gtk_stack_buildable_interface_init (GtkBuildableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkStack, gtk_stack, GTK_TYPE_CONTAINER,
G_ADD_PRIVATE (GtkStack)
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_stack_buildable_interface_init))
enum {
PROP_0,
PROP_HOMOGENEOUS,
PROP_HHOMOGENEOUS,
PROP_VHOMOGENEOUS,
PROP_VISIBLE_CHILD,
PROP_VISIBLE_CHILD_NAME,
PROP_TRANSITION_DURATION,
PROP_TRANSITION_TYPE,
PROP_TRANSITION_RUNNING,
PROP_INTERPOLATE_SIZE,
PROP_PAGES,
LAST_PROP
};
enum
{
CHILD_PROP_0,
CHILD_PROP_CHILD,
CHILD_PROP_NAME,
CHILD_PROP_TITLE,
CHILD_PROP_ICON_NAME,
CHILD_PROP_NEEDS_ATTENTION,
CHILD_PROP_VISIBLE,
LAST_CHILD_PROP
};
struct _GtkStackPage {
GObject instance;
GtkWidget *widget;
gchar *name;
gchar *title;
gchar *icon_name;
gboolean needs_attention;
gboolean visible;
GtkWidget *last_focus;
};
struct _GtkStackPageClass {
GObjectClass parent_class;
};
static GParamSpec *stack_props[LAST_PROP] = { NULL, };
static GParamSpec *stack_child_props[LAST_CHILD_PROP] = { NULL, };
G_DEFINE_TYPE (GtkStackPage, gtk_stack_page, G_TYPE_OBJECT)
static void
gtk_stack_page_init (GtkStackPage *page)
{
page->visible = TRUE;
}
static void
gtk_stack_page_finalize (GObject *object)
{
GtkStackPage *page = GTK_STACK_PAGE (object);
g_clear_object (&page->widget);
g_free (page->name);
g_free (page->title);
g_free (page->icon_name);
if (page->last_focus)
g_object_remove_weak_pointer (G_OBJECT (page->last_focus),
(gpointer *)&page->last_focus);
G_OBJECT_CLASS (gtk_stack_page_parent_class)->finalize (object);
}
static void
gtk_stack_page_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkStackPage *info = GTK_STACK_PAGE (object);
switch (property_id)
{
case CHILD_PROP_CHILD:
g_value_set_object (value, info->widget);
break;
case CHILD_PROP_NAME:
g_value_set_string (value, info->name);
break;
case CHILD_PROP_TITLE:
g_value_set_string (value, info->title);
break;
case CHILD_PROP_ICON_NAME:
g_value_set_string (value, info->icon_name);
break;
case CHILD_PROP_NEEDS_ATTENTION:
g_value_set_boolean (value, info->needs_attention);
break;
case CHILD_PROP_VISIBLE:
g_value_set_boolean (value, info->visible);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_stack_page_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkStackPage *info = GTK_STACK_PAGE (object);
GtkWidget *stack = NULL;
GtkStackPrivate *priv = NULL;
gchar *name;
GList *l;
if (info->widget)
{
stack = gtk_widget_get_parent (info->widget);
if (stack)
priv = gtk_stack_get_instance_private (GTK_STACK (stack));
}
switch (property_id)
{
case CHILD_PROP_CHILD:
g_set_object (&info->widget, g_value_get_object (value));
break;
case CHILD_PROP_NAME:
name = g_value_dup_string (value);
for (l = priv ? priv->children : NULL; l != NULL; l = l->next)
{
GtkStackPage *info2 = l->data;
if (info == info2)
continue;
if (g_strcmp0 (info2->name, name) == 0)
{
g_warning ("Duplicate child name in GtkStack: %s", name);
break;
}
}
g_free (info->name);
info->name = name;
g_object_notify_by_pspec (object, pspec);
if (priv && priv->visible_child == info)
g_object_notify_by_pspec (G_OBJECT (stack),
stack_props[PROP_VISIBLE_CHILD_NAME]);
break;
case CHILD_PROP_TITLE:
g_free (info->title);
info->title = g_value_dup_string (value);
g_object_notify_by_pspec (object, pspec);
break;
case CHILD_PROP_ICON_NAME:
g_free (info->icon_name);
info->icon_name = g_value_dup_string (value);
g_object_notify_by_pspec (object, pspec);
break;
case CHILD_PROP_NEEDS_ATTENTION:
if (info->needs_attention != g_value_get_boolean (value))
{
info->needs_attention = g_value_get_boolean (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case CHILD_PROP_VISIBLE:
if (info->visible != g_value_get_boolean (value))
{
info->visible = g_value_get_boolean (value);
if (info->widget)
gtk_widget_set_visible (info->widget, info->visible);
g_object_notify_by_pspec (object, pspec);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_stack_page_class_init (GtkStackPageClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = gtk_stack_page_finalize;
object_class->get_property = gtk_stack_page_get_property;
object_class->set_property = gtk_stack_page_set_property;
stack_child_props[CHILD_PROP_CHILD] =
g_param_spec_object ("child",
P_("Child"),
P_("The child of the page"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
stack_child_props[CHILD_PROP_NAME] =
g_param_spec_string ("name",
P_("Name"),
P_("The name of the child page"),
NULL,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
stack_child_props[CHILD_PROP_TITLE] =
g_param_spec_string ("title",
P_("Title"),
P_("The title of the child page"),
NULL,
GTK_PARAM_READWRITE);
stack_child_props[CHILD_PROP_ICON_NAME] =
g_param_spec_string ("icon-name",
P_("Icon name"),
P_("The icon name of the child page"),
NULL,
GTK_PARAM_READWRITE);
/**
* GtkStack:needs-attention:
*
* Sets a flag specifying whether the child requires the user attention.
* This is used by the #GtkStackSwitcher to change the appearance of the
* corresponding button when a page needs attention and it is not the
* current one.
*/
stack_child_props[CHILD_PROP_NEEDS_ATTENTION] =
g_param_spec_boolean ("needs-attention",
P_("Needs Attention"),
P_("Whether this page needs attention"),
FALSE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_child_props[CHILD_PROP_VISIBLE] =
g_param_spec_boolean ("visible",
P_("Visible"),
P_("Whether this page is visible"),
TRUE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, LAST_CHILD_PROP, stack_child_props);
}
#define GTK_TYPE_STACK_PAGES (gtk_stack_pages_get_type ())
G_DECLARE_FINAL_TYPE (GtkStackPages, gtk_stack_pages, GTK, STACK_PAGES, GObject)
struct _GtkStackPages
{
GObject parent_instance;
GtkStack *stack;
};
struct _GtkStackPagesClass
{
GObjectClass parent_class;
};
static GType
gtk_stack_pages_get_item_type (GListModel *model)
{
return GTK_TYPE_STACK_PAGE;
}
static guint
gtk_stack_pages_get_n_items (GListModel *model)
{
GtkStackPages *pages = GTK_STACK_PAGES (model);
GtkStackPrivate *priv = gtk_stack_get_instance_private (pages->stack);
return g_list_length (priv->children);
}
static gpointer
gtk_stack_pages_get_item (GListModel *model,
guint position)
{
GtkStackPages *pages = GTK_STACK_PAGES (model);
GtkStackPrivate *priv = gtk_stack_get_instance_private (pages->stack);
GtkStackPage *page;
page = g_list_nth_data (priv->children, position);
return g_object_ref (page);
}
static void
gtk_stack_pages_list_model_init (GListModelInterface *iface)
{
iface->get_item_type = gtk_stack_pages_get_item_type;
iface->get_n_items = gtk_stack_pages_get_n_items;
iface->get_item = gtk_stack_pages_get_item;
}
static gboolean
gtk_stack_pages_is_selected (GtkSelectionModel *model,
guint position)
{
GtkStackPages *pages = GTK_STACK_PAGES (model);
GtkStackPrivate *priv = gtk_stack_get_instance_private (pages->stack);
GtkStackPage *page;
page = g_list_nth_data (priv->children, position);
return page == priv->visible_child;
}
static void set_visible_child (GtkStack *stack,
GtkStackPage *child_info,
GtkStackTransitionType transition_type,
guint transition_duration);
static gboolean
gtk_stack_pages_select_item (GtkSelectionModel *model,
guint position,
gboolean exclusive)
{
GtkStackPages *pages = GTK_STACK_PAGES (model);
GtkStackPrivate *priv = gtk_stack_get_instance_private (pages->stack);
GtkStackPage *page;
page = g_list_nth_data (priv->children, position);
set_visible_child (pages->stack, page, priv->transition_type, priv->transition_duration);
return TRUE;
}
static void
gtk_stack_pages_selection_model_init (GtkSelectionModelInterface *iface)
{
iface->is_selected = gtk_stack_pages_is_selected;
iface->select_item = gtk_stack_pages_select_item;
}
G_DEFINE_TYPE_WITH_CODE (GtkStackPages, gtk_stack_pages, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, gtk_stack_pages_list_model_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_SELECTION_MODEL, gtk_stack_pages_selection_model_init))
static void
gtk_stack_pages_init (GtkStackPages *pages)
{
}
static void
gtk_stack_pages_class_init (GtkStackPagesClass *class)
{
}
static GtkStackPages *
gtk_stack_pages_new (GtkStack *stack)
{
GtkStackPages *pages;
pages = g_object_new (GTK_TYPE_STACK_PAGES, NULL);
pages->stack = stack;
return pages;
}
static void gtk_stack_add (GtkContainer *widget,
GtkWidget *child);
static void gtk_stack_remove (GtkContainer *widget,
GtkWidget *child);
static void gtk_stack_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data);
static void gtk_stack_compute_expand (GtkWidget *widget,
gboolean *hexpand,
gboolean *vexpand);
static void gtk_stack_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline);
static void gtk_stack_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot);
static void gtk_stack_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_stack_dispose (GObject *obj);
static void gtk_stack_finalize (GObject *obj);
static void gtk_stack_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_stack_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_stack_unschedule_ticks (GtkStack *stack);
static void gtk_stack_add_page (GtkStack *stack,
GtkStackPage *page);
static void
gtk_stack_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *type)
{
if (GTK_IS_STACK_PAGE (child))
gtk_stack_add_page (GTK_STACK (buildable), GTK_STACK_PAGE (child));
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));
}
static void
gtk_stack_buildable_interface_init (GtkBuildableIface *iface)
{
iface->add_child = gtk_stack_buildable_add_child;
}
static void stack_remove (GtkStack *stack,
GtkWidget *child,
gboolean in_dispose);
static void
remove_child (GtkWidget *child, gpointer user_data)
{
stack_remove (GTK_STACK (user_data), child, TRUE);
}
static void
gtk_stack_dispose (GObject *obj)
{
GtkStack *stack = GTK_STACK (obj);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->pages)
g_list_model_items_changed (G_LIST_MODEL (priv->pages), 0, g_list_length (priv->children), 0);
gtk_container_foreach (GTK_CONTAINER (obj), remove_child, obj);
G_OBJECT_CLASS (gtk_stack_parent_class)->dispose (obj);
}
static void
gtk_stack_finalize (GObject *obj)
{
GtkStack *stack = GTK_STACK (obj);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->pages)
g_object_remove_weak_pointer (G_OBJECT (priv->pages), (gpointer *)&priv->pages);
gtk_stack_unschedule_ticks (stack);
g_clear_pointer (&priv->last_visible_node, gsk_render_node_unref);
G_OBJECT_CLASS (gtk_stack_parent_class)->finalize (obj);
}
static void
gtk_stack_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkStack *stack = GTK_STACK (object);
switch (property_id)
{
case PROP_HOMOGENEOUS:
g_value_set_boolean (value, gtk_stack_get_homogeneous (stack));
break;
case PROP_HHOMOGENEOUS:
g_value_set_boolean (value, gtk_stack_get_hhomogeneous (stack));
break;
case PROP_VHOMOGENEOUS:
g_value_set_boolean (value, gtk_stack_get_vhomogeneous (stack));
break;
case PROP_VISIBLE_CHILD:
g_value_set_object (value, gtk_stack_get_visible_child (stack));
break;
case PROP_VISIBLE_CHILD_NAME:
g_value_set_string (value, gtk_stack_get_visible_child_name (stack));
break;
case PROP_TRANSITION_DURATION:
g_value_set_uint (value, gtk_stack_get_transition_duration (stack));
break;
case PROP_TRANSITION_TYPE:
g_value_set_enum (value, gtk_stack_get_transition_type (stack));
break;
case PROP_TRANSITION_RUNNING:
g_value_set_boolean (value, gtk_stack_get_transition_running (stack));
break;
case PROP_INTERPOLATE_SIZE:
g_value_set_boolean (value, gtk_stack_get_interpolate_size (stack));
break;
case PROP_PAGES:
g_value_set_object (value, gtk_stack_get_pages (stack));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_stack_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkStack *stack = GTK_STACK (object);
switch (property_id)
{
case PROP_HOMOGENEOUS:
gtk_stack_set_homogeneous (stack, g_value_get_boolean (value));
break;
case PROP_HHOMOGENEOUS:
gtk_stack_set_hhomogeneous (stack, g_value_get_boolean (value));
break;
case PROP_VHOMOGENEOUS:
gtk_stack_set_vhomogeneous (stack, g_value_get_boolean (value));
break;
case PROP_VISIBLE_CHILD:
gtk_stack_set_visible_child (stack, g_value_get_object (value));
break;
case PROP_VISIBLE_CHILD_NAME:
gtk_stack_set_visible_child_name (stack, g_value_get_string (value));
break;
case PROP_TRANSITION_DURATION:
gtk_stack_set_transition_duration (stack, g_value_get_uint (value));
break;
case PROP_TRANSITION_TYPE:
gtk_stack_set_transition_type (stack, g_value_get_enum (value));
break;
case PROP_INTERPOLATE_SIZE:
gtk_stack_set_interpolate_size (stack, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_stack_class_init (GtkStackClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
object_class->get_property = gtk_stack_get_property;
object_class->set_property = gtk_stack_set_property;
object_class->dispose = gtk_stack_dispose;
object_class->finalize = gtk_stack_finalize;
widget_class->size_allocate = gtk_stack_size_allocate;
widget_class->snapshot = gtk_stack_snapshot;
widget_class->measure = gtk_stack_measure;
widget_class->compute_expand = gtk_stack_compute_expand;
container_class->add = gtk_stack_add;
container_class->remove = gtk_stack_remove;
container_class->forall = gtk_stack_forall;
stack_props[PROP_HOMOGENEOUS] =
g_param_spec_boolean ("homogeneous", P_("Homogeneous"), P_("Homogeneous sizing"),
TRUE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkStack:hhomogeneous:
*
* %TRUE if the stack allocates the same width for all children.
*/
stack_props[PROP_HHOMOGENEOUS] =
g_param_spec_boolean ("hhomogeneous", P_("Horizontally homogeneous"), P_("Horizontally homogeneous sizing"),
TRUE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkStack:vhomogeneous:
*
* %TRUE if the stack allocates the same height for all children.
*/
stack_props[PROP_VHOMOGENEOUS] =
g_param_spec_boolean ("vhomogeneous", P_("Vertically homogeneous"), P_("Vertically homogeneous sizing"),
TRUE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_VISIBLE_CHILD] =
g_param_spec_object ("visible-child", P_("Visible child"), P_("The widget currently visible in the stack"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_VISIBLE_CHILD_NAME] =
g_param_spec_string ("visible-child-name", P_("Name of visible child"), P_("The name of the widget currently visible in the stack"),
NULL,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_TRANSITION_DURATION] =
g_param_spec_uint ("transition-duration", P_("Transition duration"), P_("The animation duration, in milliseconds"),
0, G_MAXUINT, 200,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_TRANSITION_TYPE] =
g_param_spec_enum ("transition-type", P_("Transition type"), P_("The type of animation used to transition"),
GTK_TYPE_STACK_TRANSITION_TYPE, GTK_STACK_TRANSITION_TYPE_NONE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_TRANSITION_RUNNING] =
g_param_spec_boolean ("transition-running", P_("Transition running"), P_("Whether or not the transition is currently running"),
FALSE,
GTK_PARAM_READABLE);
stack_props[PROP_INTERPOLATE_SIZE] =
g_param_spec_boolean ("interpolate-size", P_("Interpolate size"), P_("Whether or not the size should smoothly change when changing between differently sized children"),
FALSE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
stack_props[PROP_PAGES] =
g_param_spec_object ("pages", P_("Pages"), P_("A selection model with the stacks pages"),
GTK_TYPE_SELECTION_MODEL,
GTK_PARAM_READABLE);
g_object_class_install_properties (object_class, LAST_PROP, stack_props);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_STACK_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, I_("stack"));
}
/**
* gtk_stack_new:
*
* Creates a new #GtkStack container.
*
* Returns: a new #GtkStack
*/
GtkWidget *
gtk_stack_new (void)
{
return g_object_new (GTK_TYPE_STACK, NULL);
}
static GtkStackPage *
find_child_info_for_widget (GtkStack *stack,
GtkWidget *child)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *info;
GList *l;
for (l = priv->children; l != NULL; l = l->next)
{
info = l->data;
if (info->widget == child)
return info;
}
return NULL;
}
static inline gboolean
is_left_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_LEFT);
}
static inline gboolean
is_right_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_RIGHT);
}
static inline gboolean
is_up_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_UP ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_UP);
}
static inline gboolean
is_down_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_DOWN);
}
/* Transitions that cause the bin window to move */
static inline gboolean
is_window_moving_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT ||
transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT ||
transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_UP ||
transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_UP ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_DOWN ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_LEFT ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_RIGHT);
}
/* Transitions that change direction depending on the relative order of the
old and new child */
static inline gboolean
is_direction_dependent_transition (GtkStackTransitionType transition_type)
{
return (transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT ||
transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_UP_DOWN ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_UP_DOWN ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_DOWN_UP ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_LEFT_RIGHT ||
transition_type == GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT);
}
/* Returns simple transition type for a direction dependent transition, given
whether the new child (the one being switched to) is first in the stacking order
(added earlier). */
static inline GtkStackTransitionType
get_simple_transition_type (gboolean new_child_first,
GtkStackTransitionType transition_type)
{
switch (transition_type)
{
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT : GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT;
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP_DOWN:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN : GTK_STACK_TRANSITION_TYPE_SLIDE_UP;
case GTK_STACK_TRANSITION_TYPE_OVER_UP_DOWN:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_DOWN : GTK_STACK_TRANSITION_TYPE_OVER_UP;
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN_UP:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_UP : GTK_STACK_TRANSITION_TYPE_OVER_DOWN;
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT_RIGHT:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT : GTK_STACK_TRANSITION_TYPE_OVER_LEFT;
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT:
return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_LEFT : GTK_STACK_TRANSITION_TYPE_OVER_RIGHT;
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP:
case GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN:
case GTK_STACK_TRANSITION_TYPE_UNDER_UP:
case GTK_STACK_TRANSITION_TYPE_UNDER_DOWN:
case GTK_STACK_TRANSITION_TYPE_NONE:
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT:
case GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT:
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT:
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT:
case GTK_STACK_TRANSITION_TYPE_UNDER_LEFT:
case GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT:
case GTK_STACK_TRANSITION_TYPE_CROSSFADE:
default:
return transition_type;
}
}
static gint
get_bin_window_x (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
int width;
int x = 0;
width = gtk_widget_get_width (GTK_WIDGET (stack));
if (gtk_progress_tracker_get_state (&priv->tracker) != GTK_PROGRESS_STATE_AFTER)
{
if (is_left_transition (priv->active_transition_type))
x = width * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
if (is_right_transition (priv->active_transition_type))
x = -width * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
}
return x;
}
static gint
get_bin_window_y (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
int height;
int y = 0;
height = gtk_widget_get_height (GTK_WIDGET (stack));
if (gtk_progress_tracker_get_state (&priv->tracker) != GTK_PROGRESS_STATE_AFTER)
{
if (is_up_transition (priv->active_transition_type))
y = height * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
if (is_down_transition(priv->active_transition_type))
y = -height * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
}
return y;
}
static void
gtk_stack_progress_updated (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (!priv->vhomogeneous || !priv->hhomogeneous)
gtk_widget_queue_resize (GTK_WIDGET (stack));
else if (is_window_moving_transition (priv->active_transition_type))
gtk_widget_queue_allocate (GTK_WIDGET (stack));
else
gtk_widget_queue_draw (GTK_WIDGET (stack));
if (gtk_progress_tracker_get_state (&priv->tracker) == GTK_PROGRESS_STATE_AFTER)
{
g_clear_pointer (&priv->last_visible_node, gsk_render_node_unref);
if (priv->last_visible_child != NULL)
{
gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE);
priv->last_visible_child = NULL;
}
}
}
static gboolean
gtk_stack_transition_cb (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer user_data)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->first_frame_skipped)
gtk_progress_tracker_advance_frame (&priv->tracker,
gdk_frame_clock_get_frame_time (frame_clock));
else
priv->first_frame_skipped = TRUE;
/* Finish animation early if not mapped anymore */
if (!gtk_widget_get_mapped (widget))
gtk_progress_tracker_finish (&priv->tracker);
gtk_stack_progress_updated (GTK_STACK (widget));
if (gtk_progress_tracker_get_state (&priv->tracker) == GTK_PROGRESS_STATE_AFTER)
{
priv->tick_id = 0;
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_TRANSITION_RUNNING]);
return FALSE;
}
return TRUE;
}
static void
gtk_stack_schedule_ticks (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->tick_id == 0)
{
priv->tick_id =
gtk_widget_add_tick_callback (GTK_WIDGET (stack), gtk_stack_transition_cb, stack, NULL);
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_TRANSITION_RUNNING]);
}
}
static void
gtk_stack_unschedule_ticks (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->tick_id != 0)
{
gtk_widget_remove_tick_callback (GTK_WIDGET (stack), priv->tick_id);
priv->tick_id = 0;
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_TRANSITION_RUNNING]);
}
}
static GtkStackTransitionType
effective_transition_type (GtkStack *stack,
GtkStackTransitionType transition_type)
{
if (_gtk_widget_get_direction (GTK_WIDGET (stack)) == GTK_TEXT_DIR_RTL)
{
switch (transition_type)
{
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT:
return GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT;
case GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT:
return GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT;
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT:
return GTK_STACK_TRANSITION_TYPE_OVER_RIGHT;
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT:
return GTK_STACK_TRANSITION_TYPE_OVER_LEFT;
case GTK_STACK_TRANSITION_TYPE_UNDER_LEFT:
return GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT;
case GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT:
return GTK_STACK_TRANSITION_TYPE_UNDER_LEFT;
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP:
case GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN:
case GTK_STACK_TRANSITION_TYPE_UNDER_UP:
case GTK_STACK_TRANSITION_TYPE_UNDER_DOWN:
case GTK_STACK_TRANSITION_TYPE_NONE:
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT:
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_UP_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT_RIGHT:
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT:
case GTK_STACK_TRANSITION_TYPE_CROSSFADE:
default:
return transition_type;
}
}
else
{
return transition_type;
}
}
static void
gtk_stack_start_transition (GtkStack *stack,
GtkStackTransitionType transition_type,
guint transition_duration)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkWidget *widget = GTK_WIDGET (stack);
if (gtk_widget_get_mapped (widget) &&
gtk_settings_get_enable_animations (gtk_widget_get_settings (widget)) &&
transition_type != GTK_STACK_TRANSITION_TYPE_NONE &&
transition_duration != 0 &&
priv->last_visible_child != NULL)
{
priv->active_transition_type = effective_transition_type (stack, transition_type);
priv->first_frame_skipped = FALSE;
gtk_stack_schedule_ticks (stack);
gtk_progress_tracker_start (&priv->tracker,
priv->transition_duration * 1000,
0,
1.0);
}
else
{
gtk_stack_unschedule_ticks (stack);
priv->active_transition_type = GTK_STACK_TRANSITION_TYPE_NONE;
gtk_progress_tracker_finish (&priv->tracker);
}
gtk_stack_progress_updated (GTK_STACK (widget));
}
static void
set_visible_child (GtkStack *stack,
GtkStackPage *child_info,
GtkStackTransitionType transition_type,
guint transition_duration)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *info;
GtkWidget *widget = GTK_WIDGET (stack);
GList *l;
GtkWidget *toplevel;
GtkWidget *focus;
gboolean contains_focus = FALSE;
guint old_pos = GTK_INVALID_LIST_POSITION;
guint new_pos = GTK_INVALID_LIST_POSITION;
/* if we are being destroyed, do not bother with transitions
* and notifications
*/
if (gtk_widget_in_destruction (widget))
return;
/* If none, pick first visible */
if (child_info == NULL)
{
for (l = priv->children; l != NULL; l = l->next)
{
info = l->data;
if (gtk_widget_get_visible (info->widget))
{
child_info = info;
break;
}
}
}
if (child_info == priv->visible_child)
return;
if (priv->pages)
{
guint position;
for (l = priv->children, position = 0; l != NULL; l = l->next, position++)
{
info = l->data;
if (info == priv->visible_child)
old_pos = position;
else if (info == child_info)
new_pos = position;
}
}
toplevel = gtk_widget_get_toplevel (widget);
if (GTK_IS_WINDOW (toplevel))
{
focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
if (focus &&
priv->visible_child &&
priv->visible_child->widget &&
gtk_widget_is_ancestor (focus, priv->visible_child->widget))
{
contains_focus = TRUE;
if (priv->visible_child->last_focus)
g_object_remove_weak_pointer (G_OBJECT (priv->visible_child->last_focus),
(gpointer *)&priv->visible_child->last_focus);
priv->visible_child->last_focus = focus;
g_object_add_weak_pointer (G_OBJECT (priv->visible_child->last_focus),
(gpointer *)&priv->visible_child->last_focus);
}
}
if (priv->last_visible_child)
gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE);
priv->last_visible_child = NULL;
g_clear_pointer (&priv->last_visible_node, gsk_render_node_unref);
if (priv->visible_child && priv->visible_child->widget)
{
if (gtk_widget_is_visible (widget))
{
priv->last_visible_child = priv->visible_child;
priv->last_visible_widget_width = gtk_widget_get_allocated_width (priv->last_visible_child->widget);
priv->last_visible_widget_height = gtk_widget_get_allocated_height (priv->last_visible_child->widget);
}
else
{
gtk_widget_set_child_visible (priv->visible_child->widget, FALSE);
}
}
gtk_stack_accessible_update_visible_child (stack,
priv->visible_child ? priv->visible_child->widget : NULL,
child_info ? child_info->widget : NULL);
priv->visible_child = child_info;
if (child_info)
{
gtk_widget_set_child_visible (child_info->widget, TRUE);
if (contains_focus)
{
if (child_info->last_focus)
gtk_widget_grab_focus (child_info->last_focus);
else
gtk_widget_child_focus (child_info->widget, GTK_DIR_TAB_FORWARD);
}
}
if ((child_info == NULL || priv->last_visible_child == NULL) &&
is_direction_dependent_transition (transition_type))
{
transition_type = GTK_STACK_TRANSITION_TYPE_NONE;
}
else if (is_direction_dependent_transition (transition_type))
{
gboolean i_first = FALSE;
for (l = priv->children; l != NULL; l = l->next)
{
if (child_info == l->data)
{
i_first = TRUE;
break;
}
if (priv->last_visible_child == l->data)
break;
}
transition_type = get_simple_transition_type (i_first, transition_type);
}
if (priv->hhomogeneous && priv->vhomogeneous)
gtk_widget_queue_allocate (widget);
else
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_VISIBLE_CHILD]);
g_object_notify_by_pspec (G_OBJECT (stack),
stack_props[PROP_VISIBLE_CHILD_NAME]);
if (priv->pages)
{
if (old_pos == GTK_INVALID_LIST_POSITION && new_pos == GTK_INVALID_LIST_POSITION)
; /* nothing to do */
else if (old_pos == GTK_INVALID_LIST_POSITION)
gtk_selection_model_selection_changed (priv->pages, new_pos, 1);
else if (new_pos == GTK_INVALID_LIST_POSITION)
gtk_selection_model_selection_changed (priv->pages, old_pos, 1);
else
gtk_selection_model_selection_changed (priv->pages,
MIN (old_pos, new_pos),
MAX (old_pos, new_pos) - MIN (old_pos, new_pos) + 1);
}
gtk_stack_start_transition (stack, transition_type, transition_duration);
}
static void
stack_child_visibility_notify_cb (GObject *obj,
GParamSpec *pspec,
gpointer user_data)
{
GtkStack *stack = GTK_STACK (user_data);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkWidget *child = GTK_WIDGET (obj);
GtkStackPage *child_info;
child_info = find_child_info_for_widget (stack, child);
if (priv->visible_child == NULL &&
gtk_widget_get_visible (child))
set_visible_child (stack, child_info, priv->transition_type, priv->transition_duration);
else if (priv->visible_child == child_info &&
!gtk_widget_get_visible (child))
set_visible_child (stack, NULL, priv->transition_type, priv->transition_duration);
if (child_info == priv->last_visible_child)
{
gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE);
priv->last_visible_child = NULL;
}
}
static void
gtk_stack_add_internal (GtkStack *stack,
GtkWidget *child,
const char *name,
const char *title);
/**
* gtk_stack_add_titled:
* @stack: a #GtkStack
* @child: the widget to add
* @name: the name for @child
* @title: a human-readable title for @child
*
* Adds a child to @stack.
* The child is identified by the @name. The @title
* will be used by #GtkStackSwitcher to represent
* @child in a tab bar, so it should be short.
*/
void
gtk_stack_add_titled (GtkStack *stack,
GtkWidget *child,
const gchar *name,
const gchar *title)
{
g_return_if_fail (GTK_IS_STACK (stack));
g_return_if_fail (GTK_IS_WIDGET (child));
gtk_stack_add_internal (stack, child, name, title);
}
/**
* gtk_stack_add_named:
* @stack: a #GtkStack
* @child: the widget to add
* @name: the name for @child
*
* Adds a child to @stack.
* The child is identified by the @name.
*/
void
gtk_stack_add_named (GtkStack *stack,
GtkWidget *child,
const gchar *name)
{
g_return_if_fail (GTK_IS_STACK (stack));
g_return_if_fail (GTK_IS_WIDGET (child));
gtk_stack_add_internal (stack, child, name, NULL);
}
static void
gtk_stack_add (GtkContainer *container,
GtkWidget *child)
{
GtkStack *stack = GTK_STACK (container);
gtk_stack_add_internal (stack, child, NULL, NULL);
}
static void
gtk_stack_add_internal (GtkStack *stack,
GtkWidget *child,
const char *name,
const char *title)
{
GtkStackPage *child_info;
g_return_if_fail (child != NULL);
child_info = g_object_new (GTK_TYPE_STACK_PAGE, NULL);
child_info->widget = g_object_ref (child);
child_info->name = g_strdup (name);
child_info->title = g_strdup (title);
child_info->icon_name = NULL;
child_info->needs_attention = FALSE;
child_info->last_focus = NULL;
gtk_stack_add_page (stack, child_info);
g_object_unref (child_info);
}
static void
gtk_stack_add_page (GtkStack *stack,
GtkStackPage *child_info)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GList *l;
g_return_if_fail (child_info->widget != NULL);
for (l = priv->children; l != NULL; l = l->next)
{
GtkStackPage *info = l->data;
if (info->name &&
g_strcmp0 (info->name, child_info->name) == 0)
{
g_warning ("While adding page: duplicate child name in GtkStack: %s", child_info->name);
break;
}
}
priv->children = g_list_append (priv->children, g_object_ref (child_info));
gtk_widget_set_child_visible (child_info->widget, FALSE);
gtk_widget_set_parent (child_info->widget, GTK_WIDGET (stack));
if (priv->pages)
g_list_model_items_changed (G_LIST_MODEL (priv->pages), g_list_length (priv->children) - 1, 0, 1);
g_signal_connect (child_info->widget, "notify::visible",
G_CALLBACK (stack_child_visibility_notify_cb), stack);
if (priv->visible_child == NULL &&
gtk_widget_get_visible (child_info->widget))
set_visible_child (stack, child_info, priv->transition_type, priv->transition_duration);
if (priv->hhomogeneous || priv->vhomogeneous || priv->visible_child == child_info)
gtk_widget_queue_resize (GTK_WIDGET (stack));
}
static void
stack_remove (GtkStack *stack,
GtkWidget *child,
gboolean in_dispose)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info;
gboolean was_visible;
child_info = find_child_info_for_widget (stack, child);
if (child_info == NULL)
return;
priv->children = g_list_remove (priv->children, child_info);
g_signal_handlers_disconnect_by_func (child,
stack_child_visibility_notify_cb,
stack);
was_visible = gtk_widget_get_visible (child);
g_clear_object (&child_info->widget);
if (priv->visible_child == child_info)
{
if (in_dispose)
priv->visible_child = NULL;
else
set_visible_child (stack, NULL, priv->transition_type, priv->transition_duration);
}
if (priv->last_visible_child == child_info)
priv->last_visible_child = NULL;
gtk_widget_unparent (child);
g_object_unref (child_info);
if (!in_dispose &&
(priv->hhomogeneous || priv->vhomogeneous) &&
was_visible)
gtk_widget_queue_resize (GTK_WIDGET (stack));
}
static void
gtk_stack_remove (GtkContainer *container,
GtkWidget *child)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (GTK_STACK (container));
GList *l;
guint position;
for (l = priv->children, position = 0; l; l = l->next, position++)
{
GtkStackPage *page = l->data;
if (page->widget == child)
break;
}
stack_remove (GTK_STACK (container), child, FALSE);
if (priv->pages)
g_list_model_items_changed (G_LIST_MODEL (priv->pages), position, 1, 0);
}
/**
* gtk_stack_get_page:
* @stack: a #GtkStack
* @child: a child of @stack
*
* Returns the #GtkStackPage object for @child.
*
* Returns: (transfer none): the #GtkStackPage for @child
*/
GtkStackPage *
gtk_stack_get_page (GtkStack *stack,
GtkWidget *child)
{
return find_child_info_for_widget (stack, child);
}
/**
* gtk_stack_get_child_by_name:
* @stack: a #GtkStack
* @name: the name of the child to find
*
* Finds the child of the #GtkStack with the name given as
* the argument. Returns %NULL if there is no child with this
* name.
*
* Returns: (transfer none) (nullable): the requested child of the #GtkStack
*/
GtkWidget *
gtk_stack_get_child_by_name (GtkStack *stack,
const gchar *name)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *info;
GList *l;
g_return_val_if_fail (GTK_IS_STACK (stack), NULL);
g_return_val_if_fail (name != NULL, NULL);
for (l = priv->children; l != NULL; l = l->next)
{
info = l->data;
if (info->name && strcmp (info->name, name) == 0)
return info->widget;
}
return NULL;
}
/**
* gtk_stack_page_get_child:
* @page: a #GtkStackPage
*
* Returns the stack child to which @page belongs.
*
* Returns: (transfer none): the child to which @page belongs
*/
GtkWidget *
gtk_stack_page_get_child (GtkStackPage *page)
{
return page->widget;
}
/**
* gtk_stack_set_homogeneous:
* @stack: a #GtkStack
* @homogeneous: %TRUE to make @stack homogeneous
*
* Sets the #GtkStack to be homogeneous or not. If it
* is homogeneous, the #GtkStack will request the same
* size for all its children. If it isn't, the stack
* may change size when a different child becomes visible.
*
* Homogeneity can be controlled separately
* for horizontal and vertical size, with the
* #GtkStack:hhomogeneous and #GtkStack:vhomogeneous.
*/
void
gtk_stack_set_homogeneous (GtkStack *stack,
gboolean homogeneous)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
homogeneous = !!homogeneous;
if ((priv->hhomogeneous && priv->vhomogeneous) == homogeneous)
return;
g_object_freeze_notify (G_OBJECT (stack));
if (priv->hhomogeneous != homogeneous)
{
priv->hhomogeneous = homogeneous;
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_HHOMOGENEOUS]);
}
if (priv->vhomogeneous != homogeneous)
{
priv->vhomogeneous = homogeneous;
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_VHOMOGENEOUS]);
}
if (gtk_widget_get_visible (GTK_WIDGET(stack)))
gtk_widget_queue_resize (GTK_WIDGET (stack));
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_HOMOGENEOUS]);
g_object_thaw_notify (G_OBJECT (stack));
}
/**
* gtk_stack_get_homogeneous:
* @stack: a #GtkStack
*
* Gets whether @stack is homogeneous.
* See gtk_stack_set_homogeneous().
*
* Returns: whether @stack is homogeneous.
*/
gboolean
gtk_stack_get_homogeneous (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), FALSE);
return priv->hhomogeneous && priv->vhomogeneous;
}
/**
* gtk_stack_set_hhomogeneous:
* @stack: a #GtkStack
* @hhomogeneous: %TRUE to make @stack horizontally homogeneous
*
* Sets the #GtkStack to be horizontally homogeneous or not.
* If it is homogeneous, the #GtkStack will request the same
* width for all its children. If it isn't, the stack
* may change width when a different child becomes visible.
*/
void
gtk_stack_set_hhomogeneous (GtkStack *stack,
gboolean hhomogeneous)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
hhomogeneous = !!hhomogeneous;
if (priv->hhomogeneous == hhomogeneous)
return;
priv->hhomogeneous = hhomogeneous;
if (gtk_widget_get_visible (GTK_WIDGET(stack)))
gtk_widget_queue_resize (GTK_WIDGET (stack));
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_HHOMOGENEOUS]);
}
/**
* gtk_stack_get_hhomogeneous:
* @stack: a #GtkStack
*
* Gets whether @stack is horizontally homogeneous.
* See gtk_stack_set_hhomogeneous().
*
* Returns: whether @stack is horizontally homogeneous.
*/
gboolean
gtk_stack_get_hhomogeneous (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), FALSE);
return priv->hhomogeneous;
}
/**
* gtk_stack_set_vhomogeneous:
* @stack: a #GtkStack
* @vhomogeneous: %TRUE to make @stack vertically homogeneous
*
* Sets the #GtkStack to be vertically homogeneous or not.
* If it is homogeneous, the #GtkStack will request the same
* height for all its children. If it isn't, the stack
* may change height when a different child becomes visible.
*/
void
gtk_stack_set_vhomogeneous (GtkStack *stack,
gboolean vhomogeneous)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
vhomogeneous = !!vhomogeneous;
if (priv->vhomogeneous == vhomogeneous)
return;
priv->vhomogeneous = vhomogeneous;
if (gtk_widget_get_visible (GTK_WIDGET(stack)))
gtk_widget_queue_resize (GTK_WIDGET (stack));
g_object_notify_by_pspec (G_OBJECT (stack), stack_props[PROP_VHOMOGENEOUS]);
}
/**
* gtk_stack_get_vhomogeneous:
* @stack: a #GtkStack
*
* Gets whether @stack is vertically homogeneous.
* See gtk_stack_set_vhomogeneous().
*
* Returns: whether @stack is vertically homogeneous.
*/
gboolean
gtk_stack_get_vhomogeneous (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), FALSE);
return priv->vhomogeneous;
}
/**
* gtk_stack_get_transition_duration:
* @stack: a #GtkStack
*
* Returns the amount of time (in milliseconds) that
* transitions between pages in @stack will take.
*
* Returns: the transition duration
*/
guint
gtk_stack_get_transition_duration (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), 0);
return priv->transition_duration;
}
/**
* gtk_stack_set_transition_duration:
* @stack: a #GtkStack
* @duration: the new duration, in milliseconds
*
* Sets the duration that transitions between pages in @stack
* will take.
*/
void
gtk_stack_set_transition_duration (GtkStack *stack,
guint duration)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
if (priv->transition_duration == duration)
return;
priv->transition_duration = duration;
g_object_notify_by_pspec (G_OBJECT (stack),
stack_props[PROP_TRANSITION_DURATION]);
}
/**
* gtk_stack_get_transition_type:
* @stack: a #GtkStack
*
* Gets the type of animation that will be used
* for transitions between pages in @stack.
*
* Returns: the current transition type of @stack
*/
GtkStackTransitionType
gtk_stack_get_transition_type (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), GTK_STACK_TRANSITION_TYPE_NONE);
return priv->transition_type;
}
/**
* gtk_stack_set_transition_type:
* @stack: a #GtkStack
* @transition: the new transition type
*
* Sets the type of animation that will be used for
* transitions between pages in @stack. Available
* types include various kinds of fades and slides.
*
* The transition type can be changed without problems
* at runtime, so it is possible to change the animation
* based on the page that is about to become current.
*/
void
gtk_stack_set_transition_type (GtkStack *stack,
GtkStackTransitionType transition)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
if (priv->transition_type == transition)
return;
priv->transition_type = transition;
g_object_notify_by_pspec (G_OBJECT (stack),
stack_props[PROP_TRANSITION_TYPE]);
}
/**
* gtk_stack_get_transition_running:
* @stack: a #GtkStack
*
* Returns whether the @stack is currently in a transition from one page to
* another.
*
* Returns: %TRUE if the transition is currently running, %FALSE otherwise.
*/
gboolean
gtk_stack_get_transition_running (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), FALSE);
return (priv->tick_id != 0);
}
/**
* gtk_stack_set_interpolate_size:
* @stack: A #GtkStack
* @interpolate_size: the new value
*
* Sets whether or not @stack will interpolate its size when
* changing the visible child. If the #GtkStack:interpolate-size
* property is set to %TRUE, @stack will interpolate its size between
* the current one and the one it'll take after changing the
* visible child, according to the set transition duration.
*/
void
gtk_stack_set_interpolate_size (GtkStack *stack,
gboolean interpolate_size)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
interpolate_size = !!interpolate_size;
if (priv->interpolate_size == interpolate_size)
return;
priv->interpolate_size = interpolate_size;
g_object_notify_by_pspec (G_OBJECT (stack),
stack_props[PROP_INTERPOLATE_SIZE]);
}
/**
* gtk_stack_get_interpolate_size:
* @stack: A #GtkStack
*
* Returns wether the #GtkStack is set up to interpolate between
* the sizes of children on page switch.
*
* Returns: %TRUE if child sizes are interpolated
*/
gboolean
gtk_stack_get_interpolate_size (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), FALSE);
return priv->interpolate_size;
}
/**
* gtk_stack_get_visible_child:
* @stack: a #GtkStack
*
* Gets the currently visible child of @stack, or %NULL if
* there are no visible children.
*
* Returns: (transfer none) (nullable): the visible child of the #GtkStack
*/
GtkWidget *
gtk_stack_get_visible_child (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), NULL);
return priv->visible_child ? priv->visible_child->widget : NULL;
}
/**
* gtk_stack_get_visible_child_name:
* @stack: a #GtkStack
*
* Returns the name of the currently visible child of @stack, or
* %NULL if there is no visible child.
*
* Returns: (transfer none) (nullable): the name of the visible child of the #GtkStack
*/
const gchar *
gtk_stack_get_visible_child_name (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), NULL);
if (priv->visible_child)
return priv->visible_child->name;
return NULL;
}
/**
* gtk_stack_set_visible_child:
* @stack: a #GtkStack
* @child: a child of @stack
*
* Makes @child the visible child of @stack.
*
* If @child is different from the currently
* visible child, the transition between the
* two will be animated with the current
* transition type of @stack.
*
* Note that the @child widget has to be visible itself
* (see gtk_widget_show()) in order to become the visible
* child of @stack.
*/
void
gtk_stack_set_visible_child (GtkStack *stack,
GtkWidget *child)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info;
g_return_if_fail (GTK_IS_STACK (stack));
g_return_if_fail (GTK_IS_WIDGET (child));
child_info = find_child_info_for_widget (stack, child);
if (child_info == NULL)
{
g_warning ("Given child of type '%s' not found in GtkStack",
G_OBJECT_TYPE_NAME (child));
return;
}
if (gtk_widget_get_visible (child_info->widget))
set_visible_child (stack, child_info,
priv->transition_type,
priv->transition_duration);
}
/**
* gtk_stack_set_visible_child_name:
* @stack: a #GtkStack
* @name: the name of the child to make visible
*
* Makes the child with the given name visible.
*
* If @child is different from the currently
* visible child, the transition between the
* two will be animated with the current
* transition type of @stack.
*
* Note that the child widget has to be visible itself
* (see gtk_widget_show()) in order to become the visible
* child of @stack.
*/
void
gtk_stack_set_visible_child_name (GtkStack *stack,
const gchar *name)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_if_fail (GTK_IS_STACK (stack));
gtk_stack_set_visible_child_full (stack, name, priv->transition_type);
}
/**
* gtk_stack_set_visible_child_full:
* @stack: a #GtkStack
* @name: the name of the child to make visible
* @transition: the transition type to use
*
* Makes the child with the given name visible.
*
* Note that the child widget has to be visible itself
* (see gtk_widget_show()) in order to become the visible
* child of @stack.
*/
void
gtk_stack_set_visible_child_full (GtkStack *stack,
const gchar *name,
GtkStackTransitionType transition)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info, *info;
GList *l;
g_return_if_fail (GTK_IS_STACK (stack));
if (name == NULL)
return;
child_info = NULL;
for (l = priv->children; l != NULL; l = l->next)
{
info = l->data;
if (info->name != NULL &&
strcmp (info->name, name) == 0)
{
child_info = info;
break;
}
}
if (child_info == NULL)
{
g_warning ("Child name '%s' not found in GtkStack", name);
return;
}
if (gtk_widget_get_visible (child_info->widget))
set_visible_child (stack, child_info, transition, priv->transition_duration);
}
static void
gtk_stack_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkStack *stack = GTK_STACK (container);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info;
GList *l;
l = priv->children;
while (l)
{
child_info = l->data;
l = l->next;
(* callback) (child_info->widget, callback_data);
}
}
#include <gsk/gskrendernodeprivate.h>
static void
gtk_stack_compute_expand (GtkWidget *widget,
gboolean *hexpand_p,
gboolean *vexpand_p)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
gboolean hexpand, vexpand;
GtkStackPage *child_info;
GtkWidget *child;
GList *l;
hexpand = FALSE;
vexpand = FALSE;
for (l = priv->children; l != NULL; l = l->next)
{
child_info = l->data;
child = child_info->widget;
if (!hexpand &&
gtk_widget_compute_expand (child, GTK_ORIENTATION_HORIZONTAL))
hexpand = TRUE;
if (!vexpand &&
gtk_widget_compute_expand (child, GTK_ORIENTATION_VERTICAL))
vexpand = TRUE;
if (hexpand && vexpand)
break;
}
*hexpand_p = hexpand;
*vexpand_p = vexpand;
}
static void
gtk_stack_snapshot_crossfade (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
gdouble progress = gtk_progress_tracker_get_progress (&priv->tracker, FALSE);
gtk_snapshot_push_cross_fade (snapshot, progress);
if (priv->last_visible_node)
{
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (
priv->last_visible_surface_allocation.x,
priv->last_visible_surface_allocation.y));
gtk_snapshot_append_node (snapshot, priv->last_visible_node);
gtk_snapshot_restore (snapshot);
}
gtk_snapshot_pop (snapshot);
gtk_widget_snapshot_child (widget,
priv->visible_child->widget,
snapshot);
gtk_snapshot_pop (snapshot);
}
static void
gtk_stack_snapshot_under (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
int widget_width, widget_height;
gint x, y, width, height, pos_x, pos_y;
x = y = 0;
width = widget_width = gtk_widget_get_width (widget);
height = widget_height = gtk_widget_get_height (widget);
pos_x = pos_y = 0;
switch ((guint) priv->active_transition_type)
{
case GTK_STACK_TRANSITION_TYPE_UNDER_DOWN:
y = 0;
height = widget_height * (gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
pos_y = height;
break;
case GTK_STACK_TRANSITION_TYPE_UNDER_UP:
y = widget_height * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
height = widget_height - y;
pos_y = y - widget_height;
break;
case GTK_STACK_TRANSITION_TYPE_UNDER_LEFT:
x = widget_width * (1 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
width = widget_width - x;
pos_x = x - widget_width;
break;
case GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT:
x = 0;
width = widget_width * (gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE));
pos_x = width;
break;
default:
g_assert_not_reached ();
}
gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT(x, y, width, height));
gtk_widget_snapshot_child (widget,
priv->visible_child->widget,
snapshot);
gtk_snapshot_pop (snapshot);
if (priv->last_visible_node)
{
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (pos_x, pos_y));
gtk_snapshot_append_node (snapshot, priv->last_visible_node);
gtk_snapshot_restore (snapshot);
}
}
static void
gtk_stack_snapshot_slide (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->last_visible_node)
{
int x, y;
int width, height;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
x = get_bin_window_x (stack);
y = get_bin_window_y (stack);
switch ((guint) priv->active_transition_type)
{
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT:
x -= width;
break;
case GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT:
x += width;
break;
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP:
y -= height;
break;
case GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN:
y += height;
break;
case GTK_STACK_TRANSITION_TYPE_OVER_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN:
y = 0;
break;
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT:
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT:
x = 0;
break;
default:
g_assert_not_reached ();
break;
}
if (priv->last_visible_child != NULL)
{
if (gtk_widget_get_valign (priv->last_visible_child->widget) == GTK_ALIGN_END &&
priv->last_visible_widget_height > height)
y -= priv->last_visible_widget_height - height;
else if (gtk_widget_get_valign (priv->last_visible_child->widget) == GTK_ALIGN_CENTER)
y -= (priv->last_visible_widget_height - height) / 2;
}
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
gtk_snapshot_append_node (snapshot, priv->last_visible_node);
gtk_snapshot_restore (snapshot);
}
gtk_widget_snapshot_child (widget,
priv->visible_child->widget,
snapshot);
}
static void
gtk_stack_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
if (priv->visible_child)
{
if (gtk_progress_tracker_get_state (&priv->tracker) != GTK_PROGRESS_STATE_AFTER)
{
if (priv->last_visible_node == NULL &&
priv->last_visible_child != NULL)
{
GtkSnapshot *last_visible_snapshot;
gtk_widget_get_allocation (priv->last_visible_child->widget,
&priv->last_visible_surface_allocation);
last_visible_snapshot = gtk_snapshot_new ();
gtk_widget_snapshot (priv->last_visible_child->widget, last_visible_snapshot);
priv->last_visible_node = gtk_snapshot_free_to_node (last_visible_snapshot);
}
gtk_snapshot_push_clip (snapshot,
&GRAPHENE_RECT_INIT(
0, 0,
gtk_widget_get_width (widget),
gtk_widget_get_height (widget)
));
switch (priv->active_transition_type)
{
case GTK_STACK_TRANSITION_TYPE_CROSSFADE:
gtk_stack_snapshot_crossfade (widget, snapshot);
break;
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT:
case GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT:
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP:
case GTK_STACK_TRANSITION_TYPE_SLIDE_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT:
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT:
gtk_stack_snapshot_slide (widget, snapshot);
break;
case GTK_STACK_TRANSITION_TYPE_UNDER_UP:
case GTK_STACK_TRANSITION_TYPE_UNDER_DOWN:
case GTK_STACK_TRANSITION_TYPE_UNDER_LEFT:
case GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT:
gtk_stack_snapshot_under (widget, snapshot);
break;
case GTK_STACK_TRANSITION_TYPE_NONE:
case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT:
case GTK_STACK_TRANSITION_TYPE_SLIDE_UP_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_UP_DOWN:
case GTK_STACK_TRANSITION_TYPE_OVER_DOWN_UP:
case GTK_STACK_TRANSITION_TYPE_OVER_LEFT_RIGHT:
case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT:
default:
g_assert_not_reached ();
}
gtk_snapshot_pop (snapshot);
}
else
gtk_widget_snapshot_child (widget,
priv->visible_child->widget,
snapshot);
}
}
static void
gtk_stack_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkAllocation child_allocation;
child_allocation.x = get_bin_window_x (stack);
child_allocation.y = get_bin_window_y (stack);
if (priv->last_visible_child)
{
int min, nat;
gtk_widget_measure (priv->last_visible_child->widget, GTK_ORIENTATION_HORIZONTAL,
-1,
&min, &nat, NULL, NULL);
child_allocation.width = MAX (min, width);
gtk_widget_measure (priv->last_visible_child->widget, GTK_ORIENTATION_VERTICAL,
child_allocation.width,
&min, &nat, NULL, NULL);
child_allocation.height = MAX (min, height);
gtk_widget_size_allocate (priv->last_visible_child->widget, &child_allocation, -1);
if (!gdk_rectangle_equal (&priv->last_visible_surface_allocation,
&child_allocation))
{
g_clear_pointer (&priv->last_visible_node, gsk_render_node_unref);
}
}
child_allocation.width = width;
child_allocation.height = height;
if (priv->visible_child)
{
int min_width;
int min_height;
gtk_widget_measure (priv->visible_child->widget, GTK_ORIENTATION_HORIZONTAL,
height, &min_width, NULL, NULL, NULL);
child_allocation.width = MAX (child_allocation.width, min_width);
gtk_widget_measure (priv->visible_child->widget, GTK_ORIENTATION_VERTICAL,
child_allocation.width, &min_height, NULL, NULL, NULL);
child_allocation.height = MAX (child_allocation.height, min_height);
if (child_allocation.width > width)
{
GtkAlign halign = gtk_widget_get_halign (priv->visible_child->widget);
if (halign == GTK_ALIGN_CENTER || halign == GTK_ALIGN_FILL)
child_allocation.x = (width - child_allocation.width) / 2;
else if (halign == GTK_ALIGN_END)
child_allocation.x = (width - child_allocation.width);
}
if (child_allocation.height > height)
{
GtkAlign valign = gtk_widget_get_valign (priv->visible_child->widget);
if (valign == GTK_ALIGN_CENTER || valign == GTK_ALIGN_FILL)
child_allocation.y = (height - child_allocation.height) / 2;
else if (valign == GTK_ALIGN_END)
child_allocation.y = (height - child_allocation.height);
}
gtk_widget_size_allocate (priv->visible_child->widget, &child_allocation, -1);
}
}
#define LERP(a, b, t) ((a) + (((b) - (a)) * (1.0 - (t))))
static void
gtk_stack_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkStack *stack = GTK_STACK (widget);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info;
GtkWidget *child;
gint child_min, child_nat;
GList *l;
*minimum = 0;
*natural = 0;
for (l = priv->children; l != NULL; l = l->next)
{
child_info = l->data;
child = child_info->widget;
if (((orientation == GTK_ORIENTATION_VERTICAL && !priv->vhomogeneous) ||
(orientation == GTK_ORIENTATION_HORIZONTAL && !priv->hhomogeneous)) &&
priv->visible_child != child_info)
continue;
if (gtk_widget_get_visible (child))
{
gtk_widget_measure (child, orientation, for_size, &child_min, &child_nat, NULL, NULL);
*minimum = MAX (*minimum, child_min);
*natural = MAX (*natural, child_nat);
}
}
if (priv->last_visible_child != NULL)
{
if (orientation == GTK_ORIENTATION_VERTICAL && !priv->vhomogeneous)
{
gdouble t = priv->interpolate_size ? gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE) : 1.0;
*minimum = LERP (*minimum, priv->last_visible_widget_height, t);
*natural = LERP (*natural, priv->last_visible_widget_height, t);
}
if (orientation == GTK_ORIENTATION_HORIZONTAL && !priv->hhomogeneous)
{
gdouble t = priv->interpolate_size ? gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE) : 1.0;
*minimum = LERP (*minimum, priv->last_visible_widget_width, t);
*natural = LERP (*natural, priv->last_visible_widget_width, t);
}
}
}
static void
gtk_stack_init (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
gtk_widget_set_has_surface (GTK_WIDGET (stack), FALSE);
priv->vhomogeneous = TRUE;
priv->hhomogeneous = TRUE;
priv->transition_duration = 200;
priv->transition_type = GTK_STACK_TRANSITION_TYPE_NONE;
}
/**
* gtk_stack_get_pages:
* @stack: a #GtkStack
*
* Returns a #GListModel that contains the pages of the stack,
* and can be used to keep and up-to-date view. The model also
* implements #GtkSelectionModel and can be used to track and
* modify the visible page..
*
* Returns: (transfer full): a #GtkSelectionModel for the stack's children
*/
GtkSelectionModel *
gtk_stack_get_pages (GtkStack *stack)
{
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
g_return_val_if_fail (GTK_IS_STACK (stack), NULL);
if (priv->pages)
return g_object_ref (priv->pages);
priv->pages = GTK_SELECTION_MODEL (gtk_stack_pages_new (stack));
g_object_add_weak_pointer (G_OBJECT (priv->pages), (gpointer *)&priv->pages);
return priv->pages;
}
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