diff options
Diffstat (limited to 'gtk/gtkstack.c')
| -rw-r--r-- | gtk/gtkstack.c | 1417 |
1 files changed, 1417 insertions, 0 deletions
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c new file mode 100644 index 0000000000..14a4981b18 --- /dev/null +++ b/gtk/gtkstack.c @@ -0,0 +1,1417 @@ +/* + * 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 <math.h> +#include <string.h> + +/* TODO: + * more transition types (slides) + * filter events out events to the last_child widget during transitions + */ + +enum { + PROP_0, + PROP_HOMOGENEOUS, + PROP_VISIBLE_CHILD, + PROP_VISIBLE_CHILD_NAME, + PROP_TRANSITION_DURATION, + PROP_TRANSITION_TYPE +}; + +enum +{ + CHILD_PROP_0, + CHILD_PROP_NAME, + CHILD_PROP_TITLE, + CHILD_PROP_ICON_NAME, + CHILD_PROP_POSITION +}; + +typedef struct _GtkStackChildInfo GtkStackChildInfo; + +struct _GtkStackChildInfo { + GtkWidget *widget; + gchar *name; + gchar *title; + gchar *icon_name; +}; + +struct _GtkStackPrivate { + GList *children; + + GdkWindow* bin_window; + GdkWindow* view_window; + + GtkStackChildInfo *visible_child; + + gboolean homogeneous; + + GtkStackTransitionType transition_type; + gint transition_duration; + + GtkStackChildInfo *last_visible_child; + cairo_surface_t *last_visible_surface; + GtkAllocation last_visible_surface_allocation; + gdouble transition_pos; + + guint tick_id; + gint64 start_time; + gint64 end_time; +}; + +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, + gboolean include_internals, + 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, + GtkAllocation *allocation); +static gboolean gtk_stack_draw (GtkWidget *widget, + cairo_t *cr); +static void gtk_stack_get_preferred_height (GtkWidget *widget, + gint *minimum_height, + gint *natural_height); +static void gtk_stack_get_preferred_height_for_width (GtkWidget *widget, + gint width, + gint *minimum_height, + gint *natural_height); +static void gtk_stack_get_preferred_width (GtkWidget *widget, + gint *minimum_width, + gint *natural_width); +static void gtk_stack_get_preferred_width_for_height (GtkWidget *widget, + gint height, + gint *minimum_width, + gint *natural_width); +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_get_child_property (GtkContainer *container, + GtkWidget *child, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gtk_stack_set_child_property (GtkContainer *container, + GtkWidget *child, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gtk_stack_unschedule_ticks (GtkStack *stack); +static gint get_bin_window_x (GtkStack *stack, + GtkAllocation *allocation); + +G_DEFINE_TYPE(GtkStack, gtk_stack, GTK_TYPE_CONTAINER); + +static void +gtk_stack_init (GtkStack *stack) +{ + stack->priv = G_TYPE_INSTANCE_GET_PRIVATE (stack, GTK_TYPE_STACK, GtkStackPrivate); + + gtk_widget_set_has_window ((GtkWidget*) stack, TRUE); + gtk_widget_set_redraw_on_allocate ((GtkWidget*) stack, TRUE); +} + +static void +gtk_stack_finalize (GObject *obj) +{ + GtkStack *stack = GTK_STACK (obj); + GtkStackPrivate *priv = stack->priv; + + gtk_stack_unschedule_ticks (stack); + + if (priv->last_visible_surface != NULL) + cairo_surface_destroy (priv->last_visible_surface); + + 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); + GtkStackPrivate *priv = stack->priv; + + switch (property_id) + { + case PROP_HOMOGENEOUS: + g_value_set_boolean (value, priv->homogeneous); + break; + case PROP_VISIBLE_CHILD: + g_value_set_object (value, priv->visible_child); + 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_int (value, gtk_stack_get_transition_duration (stack)); + break; + case PROP_TRANSITION_TYPE: + g_value_set_int (value, gtk_stack_get_transition_type (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_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_int (value)); + break; + case PROP_TRANSITION_TYPE: + gtk_stack_set_transition_type (stack, g_value_get_int (value)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gtk_stack_realize (GtkWidget *widget) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkAllocation allocation; + GdkWindowAttr attributes = { 0 }; + GdkWindowAttributesType attributes_mask; + GtkStackChildInfo *info; + GList *l; + + gtk_widget_set_realized (widget, TRUE); + + gtk_widget_get_allocation (widget, &allocation); + + attributes.x = allocation.x; + attributes.y = allocation.y; + attributes.width = allocation.width; + attributes.height = allocation.height; + attributes.window_type = GDK_WINDOW_CHILD; + attributes.wclass = GDK_INPUT_OUTPUT; + attributes.visual = gtk_widget_get_visual (widget); + attributes.event_mask = + gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK; + attributes_mask = (GDK_WA_X | GDK_WA_Y) | GDK_WA_VISUAL; + + priv->view_window = + gdk_window_new (gtk_widget_get_parent_window ((GtkWidget*) stack), + &attributes, attributes_mask); + gtk_widget_set_window (widget, priv->view_window); + gtk_widget_register_window (widget, priv->view_window); + + attributes.x = get_bin_window_x (stack, &allocation); + attributes.y = 0; + attributes.width = allocation.width; + attributes.height = allocation.height; + + priv->bin_window = + gdk_window_new (priv->view_window, &attributes, attributes_mask); + gtk_widget_register_window (widget, priv->bin_window); + + for (l = priv->children; l != NULL; l = l->next) + { + info = l->data; + + gtk_widget_set_parent_window (info->widget, priv->bin_window); + } + + gdk_window_show (priv->bin_window); +} + +static void +gtk_stack_unrealize (GtkWidget *widget) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + + gtk_widget_unregister_window (widget, priv->bin_window); + gdk_window_destroy (priv->bin_window); + priv->view_window = NULL; + + GTK_WIDGET_CLASS (gtk_stack_parent_class)->unrealize (widget); +} + +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->finalize = gtk_stack_finalize; + + widget_class->size_allocate = gtk_stack_size_allocate; + widget_class->draw = gtk_stack_draw; + widget_class->realize = gtk_stack_realize; + widget_class->unrealize = gtk_stack_unrealize; + widget_class->get_preferred_height = gtk_stack_get_preferred_height; + widget_class->get_preferred_height_for_width = gtk_stack_get_preferred_height_for_width; + widget_class->get_preferred_width = gtk_stack_get_preferred_width; + widget_class->get_preferred_width_for_height = gtk_stack_get_preferred_width_for_height; + 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; + container_class->set_child_property = gtk_stack_set_child_property; + container_class->get_child_property = gtk_stack_get_child_property; + /*container_class->get_path_for_child = gtk_stack_get_path_for_child; */ + gtk_container_class_handle_border_width (container_class); + + g_object_class_install_property (object_class, + PROP_HOMOGENEOUS, + g_param_spec_boolean ("homogeneous", + P_("Homogeneous"), + P_("Homogeneous sizing"), + TRUE, + GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); + g_object_class_install_property (object_class, + 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_object_class_install_property (object_class, + 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_object_class_install_property (object_class, + PROP_TRANSITION_DURATION, + g_param_spec_int ("transition-duration", + P_("Transition duration"), + P_("The animation duration, in milliseconds"), + G_MININT, G_MAXINT, + 200, + GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); + g_object_class_install_property (object_class, + PROP_TRANSITION_TYPE, + g_param_spec_int ("transition-type", + P_("Transition type"), + P_("The type of animation used to transition"), + GTK_STACK_TRANSITION_TYPE_NONE, + G_MAXINT, + GTK_STACK_TRANSITION_TYPE_NONE, + GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); + + gtk_container_class_install_child_property (container_class, CHILD_PROP_NAME, + g_param_spec_string ("name", + P_("Name"), + P_("The name of the child page"), + NULL, + GTK_PARAM_READWRITE)); + + gtk_container_class_install_child_property (container_class, CHILD_PROP_TITLE, + g_param_spec_string ("title", + P_("Title"), + P_("The title of the child page"), + NULL, + GTK_PARAM_READWRITE)); + + gtk_container_class_install_child_property (container_class, 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)); + + gtk_container_class_install_child_property (container_class, CHILD_PROP_POSITION, + g_param_spec_int ("position", + P_("Position"), + P_("The index of the child in the parent"), + -1, G_MAXINT, 0, + GTK_PARAM_READWRITE)); + + g_type_class_add_private (klass, sizeof (GtkStackPrivate)); +} + + +GtkWidget * +gtk_stack_new (void) +{ + return g_object_new (GTK_TYPE_STACK, NULL); +} + +static GtkStackChildInfo * +find_child_info_for_widget (GtkStack *stack, + GtkWidget *child) +{ + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *info; + GList *l; + + for (l = priv->children; l != NULL; l = l->next) + { + info = l->data; + if (info->widget == child) + return info; + } + + return NULL; +} + +static void +reorder_child (GtkStack *stack, + GtkWidget *child, + gint position) +{ + GtkStackPrivate *priv; + GList *l; + GList *old_link = NULL; + GList *new_link = NULL; + GtkStackChildInfo *child_info = NULL; + gint num = 0; + + priv = stack->priv; + + l = priv->children; + + /* Loop to find the old position and link of child, new link of child and + * total number of children. new_link will be NULL if the child should be + * moved to the end (in case of position being < 0 || >= num) + */ + while (l && (new_link == NULL || old_link == NULL)) + { + /* Record the new position if found */ + if (position == num) + new_link = l; + + if (old_link == NULL) + { + GtkStackChildInfo *info; + info = l->data; + + /* Keep trying to find the current position and link location of the + child */ + if (info->widget == child) + { + old_link = l; + child_info = info; + } + } + + l = g_list_next (l); + num++; + } + + g_return_if_fail (old_link != NULL); + + if (old_link == new_link || (g_list_next (old_link) == NULL && new_link == NULL)) + return; + + priv->children = g_list_delete_link (priv->children, old_link); + priv->children = g_list_insert_before (priv->children, new_link, child_info); + + gtk_widget_child_notify (child, "position"); +} + +static void +gtk_stack_get_child_property (GtkContainer *container, + GtkWidget *child, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GtkStack *stack = GTK_STACK (container); + GtkStackChildInfo *info; + GList *list; + guint i; + + info = find_child_info_for_widget (stack, child); + if (info == NULL) + { + GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); + return; + } + + switch (property_id) + { + 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_POSITION: + i = 0; + for (list = stack->priv->children; list != NULL; list = g_list_next (list)) + { + if (info == list->data) + break; + ++i; + } + g_value_set_int (value, i); + break; + + default: + GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); + break; + } +} + +static void +gtk_stack_set_child_property (GtkContainer *container, + GtkWidget *child, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GtkStack *stack = GTK_STACK (container); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *info; + + info = find_child_info_for_widget (stack, child); + if (info == NULL) + { + GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); + return; + } + + switch (property_id) + { + case CHILD_PROP_NAME: + g_free (info->name); + info->name = g_value_dup_string (value); + + gtk_container_child_notify (container, child, "name"); + + if (priv->visible_child == info) + g_object_notify (G_OBJECT (stack), "visible-child-name"); + + break; + + case CHILD_PROP_TITLE: + g_free (info->title); + info->title = g_value_dup_string (value); + gtk_container_child_notify (container, child, "title"); + break; + + case CHILD_PROP_ICON_NAME: + g_free (info->icon_name); + info->icon_name = g_value_dup_string (value); + gtk_container_child_notify (container, child, "icon-name"); + break; + + case CHILD_PROP_POSITION: + reorder_child (stack, child, g_value_get_int (value)); + break; + + default: + GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); + break; + } +} + +/* From clutter-easing.c, based on Robert Penner's + * infamous easing equations, MIT license. + */ +static double +ease_out_cubic (double t) +{ + double p = t - 1; + return p * p * p + 1; +} + +static gint +get_bin_window_x (GtkStack *stack, + GtkAllocation *allocation) +{ + GtkStackPrivate *priv = stack->priv; + int x = 0; + + if (priv->transition_pos < 1.0) + { + if (priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT) + x = allocation->width * (1 - ease_out_cubic (priv->transition_pos)); + if (priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT) + x = -allocation->width * (1 - ease_out_cubic (priv->transition_pos)); + } + + return x; +} + +static gboolean +gtk_stack_set_transition_position (GtkStack *stack, + gdouble pos) +{ + GtkStackPrivate *priv = stack->priv; + gboolean done; + + priv->transition_pos = pos; + gtk_widget_queue_draw (GTK_WIDGET (stack)); + + if (priv->bin_window != NULL && + (priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT || + priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT)) + { + GtkAllocation allocation; + gtk_widget_get_allocation (GTK_WIDGET (stack), &allocation); + gdk_window_move (priv->bin_window, + get_bin_window_x (stack, &allocation), 0); + } + + done = pos >= 1.0; + + if (done || priv->last_visible_surface != NULL) + { + if (priv->last_visible_child) + { + gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE); + priv->last_visible_child = NULL; + } + } + + if (done) + { + if (priv->last_visible_surface != NULL) + { + cairo_surface_destroy (priv->last_visible_surface); + priv->last_visible_surface = NULL; + } + + gtk_widget_queue_resize (GTK_WIDGET (stack)); + } + + return done; +} + +static gboolean +gtk_stack_transition_cb (GtkStack *stack, + GdkFrameClock *frame_clock, + gpointer user_data) +{ + GtkStackPrivate *priv = stack->priv; + gint64 now; + gdouble t; + + now = gdk_frame_clock_get_frame_time (frame_clock); + + t = 1.0; + if (now < priv->end_time) + t = (now - priv->start_time) / (double) (priv->end_time - priv->start_time); + + /* Finish animation early if not mapped anymore */ + if (!gtk_widget_get_mapped (GTK_WIDGET (stack))) + t = 1.0; + + if (gtk_stack_set_transition_position (stack, t)) + { + gtk_widget_set_opacity (GTK_WIDGET (stack), 1.0); + priv->tick_id = 0; + + return FALSE; + } + + return TRUE; +} + +static void +gtk_stack_schedule_ticks (GtkStack *stack) +{ + GtkStackPrivate *priv = stack->priv; + + if (priv->tick_id == 0) + { + priv->tick_id = + gtk_widget_add_tick_callback (GTK_WIDGET (stack), (GtkTickCallback)gtk_stack_transition_cb, stack, NULL); + } +} + +static void +gtk_stack_unschedule_ticks (GtkStack *stack) +{ + GtkStackPrivate *priv = stack->priv; + + if (priv->tick_id != 0) + { + gtk_widget_remove_tick_callback (GTK_WIDGET (stack), priv->tick_id); + priv->tick_id = 0; + } +} + +static void +gtk_stack_start_transition (GtkStack *stack) +{ + GtkStackPrivate *priv = stack->priv; + GtkWidget *widget = GTK_WIDGET (stack); + gboolean animations_enabled; + + g_object_get (gtk_widget_get_settings (widget), + "gtk-enable-animations", &animations_enabled, + NULL); + + if (gtk_widget_get_mapped (widget) && + animations_enabled && + priv->transition_type != GTK_STACK_TRANSITION_TYPE_NONE && + priv->last_visible_child != NULL) + { + gtk_widget_set_opacity (widget, 0.999); + + priv->transition_pos = 0.0; + priv->start_time = gdk_frame_clock_get_frame_time (gtk_widget_get_frame_clock (widget)); + priv->end_time = priv->start_time + (priv->transition_duration * 1000); + gtk_stack_schedule_ticks (stack); + } + else + { + gtk_stack_unschedule_ticks (stack); + gtk_stack_set_transition_position (stack, 1.0); + } +} + +static void +set_visible_child (GtkStack *stack, + GtkStackChildInfo *child_info) +{ + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *info; + GtkWidget *widget = GTK_WIDGET (stack); + GList *l; + + /* 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->last_visible_child) + gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE); + priv->last_visible_child = NULL; + + if (priv->last_visible_surface != NULL) + cairo_surface_destroy (priv->last_visible_surface); + priv->last_visible_surface = NULL; + + if (priv->visible_child && priv->visible_child->widget) + { + if (gtk_widget_is_visible (widget)) + priv->last_visible_child = priv->visible_child; + else + gtk_widget_set_child_visible (priv->visible_child->widget, FALSE); + } + + priv->visible_child = child_info; + + if (child_info) + gtk_widget_set_child_visible (child_info->widget, TRUE); + + gtk_widget_queue_resize (GTK_WIDGET (stack)); + gtk_widget_queue_draw (GTK_WIDGET (stack)); + + g_object_notify (G_OBJECT (stack), "visible-child"); + g_object_notify (G_OBJECT (stack), "visible-child-name"); + + gtk_stack_start_transition (stack); +} + +static void +stack_child_visibility_notify_cb (GObject *obj, + GParamSpec *pspec, + gpointer user_data) +{ + GtkStack *stack = GTK_STACK (user_data); + GtkStackPrivate *priv = stack->priv; + GtkWidget *child = GTK_WIDGET (obj); + GtkStackChildInfo *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); + else if (priv->visible_child == child_info && + !gtk_widget_get_visible (child)) + set_visible_child (stack, NULL); + + if (child_info == priv->last_visible_child) + { + gtk_widget_set_child_visible (priv->last_visible_child->widget, FALSE); + priv->last_visible_child = NULL; + } +} + +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_container_add_with_properties (GTK_CONTAINER (stack), + child, + "name", name, + "title", title, + NULL); +} + +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_container_add_with_properties (GTK_CONTAINER (stack), + child, + "name", name, + NULL); +} + +static void +gtk_stack_add (GtkContainer *container, + GtkWidget *child) +{ + GtkStack *stack = GTK_STACK (container); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + + g_return_if_fail (child != NULL); + + child_info = g_slice_new (GtkStackChildInfo); + child_info->widget = child; + child_info->name = NULL; + child_info->title = NULL; + child_info->icon_name = NULL; + + priv->children = g_list_append (priv->children, child_info); + + gtk_widget_set_parent_window (child, priv->bin_window); + gtk_widget_set_parent (child, GTK_WIDGET (stack)); + + g_signal_connect (child, "notify::visible", + G_CALLBACK (stack_child_visibility_notify_cb), stack); + + gtk_widget_child_notify (child, "position"); + + if (priv->visible_child == NULL && + gtk_widget_get_visible (child)) + set_visible_child (stack, child_info); + else + gtk_widget_set_child_visible (child, FALSE); + + if (priv->homogeneous || priv->visible_child == child_info) + gtk_widget_queue_resize (GTK_WIDGET (stack)); +} + +static void +gtk_stack_remove (GtkContainer *container, + GtkWidget *child) +{ + GtkStack *stack = GTK_STACK (container); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *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); + + child_info->widget = NULL; + + if (priv->visible_child == child_info) + set_visible_child (stack, NULL); + + if (priv->last_visible_child == child_info) + priv->last_visible_child = NULL; + + gtk_widget_unparent (child); + + g_free (child_info->name); + g_free (child_info->title); + g_free (child_info->icon_name); + g_slice_free (GtkStackChildInfo, child_info); + + if (priv->homogeneous && was_visible) + gtk_widget_queue_resize (GTK_WIDGET (stack)); +} + +void +gtk_stack_set_homogeneous (GtkStack *stack, + gboolean homogeneous) +{ + GtkStackPrivate *priv; + + g_return_if_fail (GTK_IS_STACK (stack)); + + priv = stack->priv; + + homogeneous = !!homogeneous; + + if (priv->homogeneous == homogeneous) + return; + + priv->homogeneous = homogeneous; + + if (gtk_widget_get_visible (GTK_WIDGET(stack))) + gtk_widget_queue_resize (GTK_WIDGET (stack)); + + g_object_notify (G_OBJECT (stack), "homogeneous"); +} + +gboolean +gtk_stack_get_homogeneous (GtkStack *stack) +{ + g_return_val_if_fail (GTK_IS_STACK (stack), FALSE); + + return stack->priv->homogeneous; +} + +gint +gtk_stack_get_transition_duration (GtkStack *stack) +{ + g_return_val_if_fail (GTK_IS_STACK (stack), 0); + + return stack->priv->transition_duration; +} + +void +gtk_stack_set_transition_duration (GtkStack *stack, + gint value) +{ + g_return_if_fail (GTK_IS_STACK (stack)); + + stack->priv->transition_duration = value; + g_object_notify (G_OBJECT (stack), "transition-duration"); +} + +GtkStackTransitionType +gtk_stack_get_transition_type (GtkStack *stack) +{ + g_return_val_if_fail (GTK_IS_STACK (stack), GTK_STACK_TRANSITION_TYPE_NONE); + + return stack->priv->transition_type; +} + +void +gtk_stack_set_transition_type (GtkStack *stack, + GtkStackTransitionType value) +{ + g_return_if_fail (GTK_IS_STACK (stack)); + + stack->priv->transition_type = value; + g_object_notify (G_OBJECT (stack), "transition-type"); +} + +/** + * gtk_stack_get_visible_child: + * @stack: a #GtkStack + * + * Gets the currently visible child of the #GtkStack, or %NULL if the + * there are no visible children. The returned widget does not have a reference + * added, so you do not need to unref it. + * + * Return value: (transfer none): pointer to child of the #GtkStack + **/ +GtkWidget * +gtk_stack_get_visible_child (GtkStack *stack) +{ + g_return_val_if_fail (GTK_IS_STACK (stack), NULL); + + return stack->priv->visible_child ? stack->priv->visible_child->widget : NULL; +} + +const gchar * +gtk_stack_get_visible_child_name (GtkStack *stack) +{ + g_return_val_if_fail (GTK_IS_STACK (stack), NULL); + + if (stack->priv->visible_child) + return stack->priv->visible_child->name; + + return NULL; +} + +void +gtk_stack_set_visible_child (GtkStack *stack, + GtkWidget *child) +{ + GtkStackChildInfo *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) + return; + + if (gtk_widget_get_visible (child_info->widget)) + set_visible_child (stack, child_info); +} + +void +gtk_stack_set_visible_child_name (GtkStack *stack, + const gchar *name) +{ + GtkStackPrivate *priv; + GtkStackChildInfo *child_info, *info; + GList *l; + + g_return_if_fail (GTK_IS_STACK (stack)); + g_return_if_fail (name != NULL); + + priv = stack->priv; + + 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 && gtk_widget_get_visible (child_info->widget)) + set_visible_child (stack, child_info); +} + +static void +gtk_stack_forall (GtkContainer *container, + gboolean include_internals, + GtkCallback callback, + gpointer callback_data) +{ + GtkStack *stack = GTK_STACK (container); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + GList *l; + + l = priv->children; + while (l) + { + child_info = l->data; + l = l->next; + + (* callback) (child_info->widget, callback_data); + } +} + +static void +gtk_stack_compute_expand (GtkWidget *widget, + gboolean *hexpand_p, + gboolean *vexpand_p) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + gboolean hexpand, vexpand; + GtkStackChildInfo *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_draw_crossfade (GtkWidget *widget, + cairo_t *cr) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + + if (priv->last_visible_surface) + { + cairo_set_source_surface (cr, priv->last_visible_surface, + priv->last_visible_surface_allocation.x, + priv->last_visible_surface_allocation.y); + cairo_set_operator (cr, CAIRO_OPERATOR_ADD); + cairo_paint_with_alpha (cr, MAX (1.0 - priv->transition_pos, 0)); + } + + cairo_push_group (cr); + cairo_set_operator (cr, CAIRO_OPERATOR_OVER); + gtk_container_propagate_draw (GTK_CONTAINER (stack), + priv->visible_child->widget, + cr); + cairo_pop_group_to_source (cr); + cairo_set_operator (cr, CAIRO_OPERATOR_ADD); + cairo_paint_with_alpha (cr, priv->transition_pos); +} + +static void +gtk_stack_draw_slide (GtkWidget *widget, + cairo_t *cr) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkAllocation allocation; + int x = 0; + + gtk_widget_get_allocation (widget, &allocation); + + x = get_bin_window_x (stack, &allocation); + + if (priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT) + x -= allocation.width; + if (priv->transition_type == GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT) + x += allocation.width; + + if (priv->last_visible_surface) + { + cairo_save (cr); + cairo_set_source_surface (cr, priv->last_visible_surface, x, 0); + cairo_paint (cr); + cairo_restore (cr); + } + + gtk_container_propagate_draw (GTK_CONTAINER (stack), + priv->visible_child->widget, + cr); +} + +static gboolean +gtk_stack_draw (GtkWidget *widget, + cairo_t *cr) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + cairo_t *pattern_cr; + + if (priv->visible_child) + { + if (priv->transition_pos < 1.0) + { + if (priv->last_visible_surface == NULL && + priv->last_visible_child != NULL) + { + gtk_widget_get_allocation (priv->last_visible_child->widget, + &priv->last_visible_surface_allocation); + priv->last_visible_surface = + gdk_window_create_similar_surface (gtk_widget_get_window (widget), + CAIRO_CONTENT_COLOR_ALPHA, + priv->last_visible_surface_allocation.width, + priv->last_visible_surface_allocation.height); + pattern_cr = cairo_create (priv->last_visible_surface); + /* We don't use propagate_draw here, because we don't want to apply + the bin_window offset */ + gtk_widget_draw (priv->last_visible_child->widget, pattern_cr); + cairo_destroy (pattern_cr); + } + + switch (priv->transition_type) + { + case GTK_STACK_TRANSITION_TYPE_CROSSFADE: + gtk_stack_draw_crossfade (widget, cr); + break; + case GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT: + case GTK_STACK_TRANSITION_TYPE_SLIDE_RIGHT: + gtk_stack_draw_slide (widget, cr); + break; + default: + g_assert_not_reached (); + } + + } + else if (gtk_cairo_should_draw_window (cr, priv->bin_window)) + gtk_container_propagate_draw (GTK_CONTAINER (stack), + priv->visible_child->widget, + cr); + } + + return TRUE; +} + +static void +gtk_stack_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkAllocation child_allocation; + + g_return_if_fail (allocation != NULL); + + gtk_widget_set_allocation (widget, allocation); + + child_allocation = *allocation; + child_allocation.x = 0; + child_allocation.y = 0; + + if (priv->last_visible_child) + gtk_widget_size_allocate (priv->last_visible_child->widget, &child_allocation); + + if (priv->visible_child) + gtk_widget_size_allocate (priv->visible_child->widget, &child_allocation); + + if (gtk_widget_get_realized (widget)) + { + gdk_window_move_resize (priv->view_window, + allocation->x, allocation->y, + allocation->width, allocation->height); + gdk_window_move_resize (priv->bin_window, + get_bin_window_x (stack, allocation), 0, + allocation->width, allocation->height); + } +} + +static void +gtk_stack_get_preferred_height (GtkWidget *widget, + gint *minimum_height, + gint *natural_height) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + GtkWidget *child; + gint child_min, child_nat; + GList *l; + + *minimum_height = 0; + *natural_height = 0; + + for (l = priv->children; l != NULL; l = l->next) + { + child_info = l->data; + child = child_info->widget; + + if (!priv->homogeneous && + (priv->visible_child != child_info && + priv->last_visible_child != child_info)) + continue; + if (gtk_widget_get_visible (child)) + { + gtk_widget_get_preferred_height (child, &child_min, &child_nat); + + *minimum_height = MAX (*minimum_height, child_min); + *natural_height = MAX (*natural_height, child_nat); + } + } + + if (priv->last_visible_surface != NULL) + { + *minimum_height = MAX (*minimum_height, priv->last_visible_surface_allocation.height); + *natural_height = MAX (*natural_height, priv->last_visible_surface_allocation.height); + } +} + +static void +gtk_stack_get_preferred_height_for_width (GtkWidget *widget, + gint width, + gint *minimum_height, + gint *natural_height) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + GtkWidget *child; + gint child_min, child_nat; + GList *l; + + *minimum_height = 0; + *natural_height = 0; + + for (l = priv->children; l != NULL; l = l->next) + { + child_info = l->data; + child = child_info->widget; + + if (!priv->homogeneous && + (priv->visible_child != child_info && + priv->last_visible_child != child_info)) + continue; + if (gtk_widget_get_visible (child)) + { + gtk_widget_get_preferred_height_for_width (child, width, &child_min, &child_nat); + + *minimum_height = MAX (*minimum_height, child_min); + *natural_height = MAX (*natural_height, child_nat); + } + } + + if (priv->last_visible_surface != NULL) + { + *minimum_height = MAX (*minimum_height, priv->last_visible_surface_allocation.height); + *natural_height = MAX (*natural_height, priv->last_visible_surface_allocation.height); + } +} + +static void +gtk_stack_get_preferred_width (GtkWidget *widget, + gint *minimum_width, + gint *natural_width) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + GtkWidget *child; + gint child_min, child_nat; + GList *l; + + *minimum_width = 0; + *natural_width = 0; + + for (l = priv->children; l != NULL; l = l->next) + { + child_info = l->data; + child = child_info->widget; + + if (!priv->homogeneous && + (priv->visible_child != child_info && + priv->last_visible_child != child_info)) + continue; + if (gtk_widget_get_visible (child)) + { + gtk_widget_get_preferred_width (child, &child_min, &child_nat); + + *minimum_width = MAX (*minimum_width, child_min); + *natural_width = MAX (*natural_width, child_nat); + } + } + + if (priv->last_visible_surface != NULL) + { + *minimum_width = MAX (*minimum_width, priv->last_visible_surface_allocation.width); + *natural_width = MAX (*natural_width, priv->last_visible_surface_allocation.width); + } +} + +static void +gtk_stack_get_preferred_width_for_height (GtkWidget *widget, + gint height, + gint *minimum_width, + gint *natural_width) +{ + GtkStack *stack = GTK_STACK (widget); + GtkStackPrivate *priv = stack->priv; + GtkStackChildInfo *child_info; + GtkWidget *child; + gint child_min, child_nat; + GList *l; + + *minimum_width = 0; + *natural_width = 0; + + for (l = priv->children; l != NULL; l = l->next) + { + child_info = l->data; + child = child_info->widget; + + if (!priv->homogeneous && + (priv->visible_child != child_info && + priv->last_visible_child != child_info)) + continue; + if (gtk_widget_get_visible (child)) + { + gtk_widget_get_preferred_width_for_height (child, height, &child_min, &child_nat); + + *minimum_width = MAX (*minimum_width, child_min); + *natural_width = MAX (*natural_width, child_nat); + } + } + + if (priv->last_visible_surface != NULL) + { + *minimum_width = MAX (*minimum_width, priv->last_visible_surface_allocation.width); + *natural_width = MAX (*natural_width, priv->last_visible_surface_allocation.width); + } +} |