[gtk/stack-fixes: 3/7] stack: Provide a selection model
- From: Matthias Clasen <matthiasc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk/stack-fixes: 3/7] stack: Provide a selection model
- Date: Sun, 10 Feb 2019 03:59:05 +0000 (UTC)
commit 4099c77d5ada0bc1d9407930625249e36c3ea510
Author: Matthias Clasen <mclasen redhat com>
Date: Fri Feb 8 20:36:58 2019 -0500
stack: Provide a selection model
Make GtkStack expose a selection model for its children.
The model can be used to track changes to the children
and the visible child, and to change what child is
visible.
gtk/gtkstack.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
gtk/gtkstack.h | 5 ++
2 files changed, 167 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index 338199c319..f153498224 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -30,6 +30,8 @@
#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>
@@ -138,6 +140,9 @@ typedef struct {
GtkStackTransitionType active_transition_type;
+ GtkSelectionModel *pages;
+ GBinding *binding;
+
} GtkStackPrivate;
static void gtk_stack_buildable_interface_init (GtkBuildableIface *iface);
@@ -431,6 +436,7 @@ static void gtk_stack_measure (GtkWidget *widget
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,
@@ -466,6 +472,33 @@ 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);
+
+ g_clear_pointer (&priv->binding, g_binding_unbind);
+ if (priv->pages)
+ {
+ GListModel *children = gtk_selection_model_get_model (priv->pages);
+ gtk_list_list_model_clear (GTK_LIST_LIST_MODEL (children));
+ }
+ 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)
{
@@ -571,6 +604,7 @@ gtk_stack_class_init (GtkStackClass *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;
@@ -1281,6 +1315,12 @@ gtk_stack_add_page (GtkStack *stack,
gtk_widget_set_child_visible (child_info->widget, FALSE);
gtk_widget_set_parent (child_info->widget, GTK_WIDGET (stack));
+ if (priv->pages)
+ {
+ GListModel *children = gtk_selection_model_get_model (priv->pages);
+ gtk_list_list_model_item_added (GTK_LIST_LIST_MODEL (children), child_info->widget);
+ }
+
g_signal_connect (child_info->widget, "notify::visible",
G_CALLBACK (stack_child_visibility_notify_cb), stack);
@@ -1295,10 +1335,10 @@ gtk_stack_add_page (GtkStack *stack,
}
static void
-gtk_stack_remove (GtkContainer *container,
- GtkWidget *child)
+stack_remove (GtkStack *stack,
+ GtkWidget *child,
+ gboolean in_dispose)
{
- GtkStack *stack = GTK_STACK (container);
GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
GtkStackPage *child_info;
gboolean was_visible;
@@ -1308,7 +1348,7 @@ gtk_stack_remove (GtkContainer *container,
return;
priv->children = g_list_remove (priv->children, child_info);
-
+
g_signal_handlers_disconnect_by_func (child,
stack_child_visibility_notify_cb,
stack);
@@ -1318,7 +1358,12 @@ gtk_stack_remove (GtkContainer *container,
child_info->widget = NULL;
if (priv->visible_child == child_info)
- set_visible_child (stack, NULL, priv->transition_type, priv->transition_duration);
+ {
+ 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;
@@ -1327,10 +1372,28 @@ gtk_stack_remove (GtkContainer *container,
g_object_unref (child_info);
- if ((priv->hhomogeneous || priv->vhomogeneous) && was_visible)
+ 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));
+ GtkWidget *prev_sibling = gtk_widget_get_prev_sibling (child);
+
+ stack_remove (GTK_STACK (container), child, FALSE);
+
+ if (priv->pages)
+ {
+ GListModel *children = gtk_selection_model_get_model (priv->pages);
+ gtk_list_list_model_item_removed (GTK_LIST_LIST_MODEL (children), prev_sibling);
+ }
+}
+
/**
* gtk_stack_get_page:
* @stack: a #GtkStack
@@ -2294,3 +2357,96 @@ gtk_stack_init (GtkStack *stack)
priv->transition_duration = 200;
priv->transition_type = GTK_STACK_TRANSITION_TYPE_NONE;
}
+
+static gboolean
+transform_to (GBinding *binding,
+ const GValue *from_value,
+ GValue *to_value,
+ gpointer user_data)
+{
+ GtkStack *stack = user_data;
+ GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
+ GtkWidget *child;
+ guint i;
+ guint pos = GTK_INVALID_LIST_POSITION;
+
+ child = g_value_get_object (from_value);
+ for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (priv->pages)); i++)
+ {
+ GtkWidget *widget;
+ widget = g_list_model_get_item (G_LIST_MODEL (priv->pages), i);
+ if (widget == child)
+ pos = i;
+ g_object_unref (widget);
+ if (pos != GTK_INVALID_LIST_POSITION)
+ break;
+ }
+
+ g_value_set_uint (to_value, pos);
+ return TRUE;
+}
+
+static gboolean
+transform_from (GBinding *binding,
+ const GValue *from_value,
+ GValue *to_value,
+ gpointer user_data)
+{
+ GtkStack *stack = user_data;
+ GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
+ guint selected;
+
+ selected = g_value_get_uint (from_value);
+ if (selected < g_list_model_get_n_items (G_LIST_MODEL (priv->pages)))
+ {
+ GtkWidget *child;
+ child = g_list_model_get_item (G_LIST_MODEL (priv->pages), selected);
+ g_value_set_object (to_value, child);
+ g_object_unref (child);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/**
+ * gtk_stack_get_pages:
+ * @stack: a #GtkStack
+ *
+ * Returns a #GListModel that contains the children 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 child.
+ *
+ * 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);
+ GListModel *children;
+
+ g_return_val_if_fail (GTK_IS_STACK (stack), NULL);
+
+ if (priv->pages)
+ return g_object_ref (priv->pages);
+
+ children = G_LIST_MODEL (gtk_list_list_model_new (GTK_TYPE_WIDGET,
+ (gpointer) gtk_widget_get_first_child,
+ (gpointer) gtk_widget_get_next_sibling,
+ (gpointer) gtk_widget_get_prev_sibling,
+ (gpointer) gtk_widget_get_last_child,
+ (gpointer) g_object_ref,
+ stack, NULL));
+ priv->pages = GTK_SELECTION_MODEL (gtk_single_selection_new (children));
+ g_object_unref (children);
+
+ g_object_add_weak_pointer (G_OBJECT (priv->pages), (gpointer *)&priv->pages);
+ priv->binding = g_object_bind_property_full (stack, "visible-child",
+ priv->pages, "selected",
+ G_BINDING_BIDIRECTIONAL|G_BINDING_SYNC_CREATE,
+ transform_to, transform_from, stack, NULL);
+ g_object_add_weak_pointer (G_OBJECT (priv->binding), (gpointer *)&priv->binding);
+
+ return priv->pages;
+}
diff --git a/gtk/gtkstack.h b/gtk/gtkstack.h
index 6379328041..658ef8bb6a 100644
--- a/gtk/gtkstack.h
+++ b/gtk/gtkstack.h
@@ -27,6 +27,7 @@
#endif
#include <gtk/gtkcontainer.h>
+#include <gtk/gtkselectionmodel.h>
G_BEGIN_DECLS
@@ -155,6 +156,10 @@ void gtk_stack_set_interpolate_size (GtkStack *stack,
gboolean interpolate_size);
GDK_AVAILABLE_IN_ALL
gboolean gtk_stack_get_interpolate_size (GtkStack *stack);
+
+GDK_AVAILABLE_IN_ALL
+GtkSelectionModel * gtk_stack_get_pages (GtkStack *stack);
+
G_END_DECLS
#endif
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