[layout] Bind ChildMeta to LayoutManager
The ChildMeta object is a storage for child-container properties, that is properties that exist only when an actor is inside a specific container. The LayoutManager delegate class should also have layout-specific properties -- so, for this job, we can "recycle" ChildMeta as the storage.
This commit is contained in:
Emmanuele Bassi
parent
83a4e96267
commit
7051fe275d
2 changed files with 430 additions and 30 deletions
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@ -45,6 +45,9 @@
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#include "config.h"
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#endif
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#include <glib-object.h>
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#include <gobject/gvaluecollector.h>
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#include "clutter-debug.h"
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#include "clutter-layout-manager.h"
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#include "clutter-marshal.h"
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@ -68,6 +71,7 @@ G_DEFINE_ABSTRACT_TYPE (ClutterLayoutManager,
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clutter_layout_manager,
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G_TYPE_INITIALLY_UNOWNED);
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static GQuark quark_layout_meta = 0;
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static guint manager_signals[LAST_SIGNAL] = { 0, };
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static void
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@ -111,12 +115,24 @@ layout_manager_real_allocate (ClutterLayoutManager *manager,
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LAYOUT_MANAGER_WARN_NOT_IMPLEMENTED (manager, "allocate");
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}
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static ClutterChildMeta *
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layout_manager_real_create_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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return NULL;
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}
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static void
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clutter_layout_manager_class_init (ClutterLayoutManagerClass *klass)
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{
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quark_layout_meta =
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g_quark_from_static_string ("clutter-layout-manager-child-meta");
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klass->get_preferred_width = layout_manager_real_get_preferred_width;
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klass->get_preferred_height = layout_manager_real_get_preferred_height;
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klass->allocate = layout_manager_real_allocate;
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klass->create_child_meta = layout_manager_real_create_child_meta;
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/**
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* ClutterLayoutManager::layout-changed:
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@ -281,3 +297,359 @@ clutter_layout_manager_layout_changed (ClutterLayoutManager *manager)
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g_signal_emit (manager, manager_signals[LAYOUT_CHANGED], 0);
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}
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static inline ClutterChildMeta *
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create_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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ClutterLayoutManagerClass *klass;
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klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
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return klass->create_child_meta (manager, container, actor);
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}
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static inline ClutterChildMeta *
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get_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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ClutterChildMeta *meta;
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meta = g_object_get_qdata (G_OBJECT (actor), quark_layout_meta);
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if (meta != NULL &&
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meta->container == container &&
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meta->actor == actor)
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return meta;
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return NULL;
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}
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/**
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* clutter_layout_manager_get_child_meta:
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* @manager: a #ClutterLayoutManager
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* @container: a #ClutterContainer using @manager
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* @actor: a #ClutterActor child of @container
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*
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* Retrieves the #ClutterChildMeta that the layout @manager associated
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* to the @actor child of @container
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*
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* Return value: a #ClutterChildMeta or %NULL
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*
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* Since: 1.0
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*/
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ClutterChildMeta *
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clutter_layout_manager_get_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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g_return_val_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager), NULL);
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g_return_val_if_fail (CLUTTER_IS_CONTAINER (container), NULL);
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g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
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return get_child_meta (manager, container, actor);
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}
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void
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clutter_layout_manager_add_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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ClutterChildMeta *meta;
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meta = create_child_meta (manager, container, actor);
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if (meta == NULL)
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return;
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g_object_set_qdata_full (G_OBJECT (actor), quark_layout_meta,
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meta,
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(GDestroyNotify) g_object_unref);
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}
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void
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clutter_layout_manager_remove_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor)
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{
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ClutterChildMeta *meta;
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g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
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g_return_if_fail (CLUTTER_IS_CONTAINER (container));
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g_return_if_fail (CLUTTER_IS_ACTOR (actor));
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if (get_child_meta (manager, container, actor))
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g_object_set_qdata (G_OBJECT (actor), quark_layout_meta, NULL);
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}
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static inline gboolean
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layout_set_property_internal (ClutterLayoutManager *manager,
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GObject *gobject,
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GParamSpec *pspec,
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const GValue *value)
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{
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if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
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{
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g_warning ("%s: Child property '%s' of the layout manager of "
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"type '%s' is constructor-only",
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G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (manager));
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return FALSE;
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}
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if (!(pspec->flags & G_PARAM_WRITABLE))
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{
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g_warning ("%s: Child property '%s' of the layout manager of "
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"type '%s' is not writable",
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G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (manager));
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return FALSE;
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}
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g_object_set_property (gobject, pspec->name, value);
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return TRUE;
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}
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static inline gboolean
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layout_get_property_internal (ClutterLayoutManager *manager,
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GObject *gobject,
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GParamSpec *pspec,
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GValue *value)
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{
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if (!(pspec->flags & G_PARAM_READABLE))
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{
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g_warning ("%s: Child property '%s' of the layout manager of "
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"type '%s' is not readable",
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G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (manager));
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return FALSE;
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}
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g_object_get_property (gobject, pspec->name, value);
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return TRUE;
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}
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void
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clutter_layout_manager_child_set (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *first_property,
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...)
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{
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ClutterChildMeta *meta;
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GObjectClass *klass;
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const gchar *pname;
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va_list var_args;
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g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
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g_return_if_fail (CLUTTER_IS_CONTAINER (container));
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g_return_if_fail (CLUTTER_IS_ACTOR (actor));
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g_return_if_fail (first_property != NULL);
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meta = get_child_meta (manager, container, actor);
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if (meta == NULL)
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{
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g_warning ("Layout managers of type '%s' do not support "
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"child metadata",
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g_type_name (G_OBJECT_TYPE (manager)));
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return;
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}
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klass = G_OBJECT_GET_CLASS (meta);
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va_start (var_args, first_property);
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pname = first_property;
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while (pname)
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{
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GValue value = { 0, };
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GParamSpec *pspec;
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gchar *error;
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gboolean res;
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pspec = g_object_class_find_property (klass, pname);
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if (pspec == NULL)
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{
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g_warning ("%s: Layout managers of type '%s' have no child "
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"property named '%s'",
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G_STRLOC, G_OBJECT_TYPE_NAME (manager), pname);
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break;
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}
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g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
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G_VALUE_COLLECT (&value, var_args, 0, &error);
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if (error)
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{
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g_warning ("%s: %s", G_STRLOC, error);
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g_free (error);
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break;
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}
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res = layout_set_property_internal (manager, G_OBJECT (meta),
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pspec,
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&value);
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g_value_unset (&value);
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if (!res)
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break;
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pname = va_arg (var_args, gchar*);
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}
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va_end (var_args);
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}
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void
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clutter_layout_manager_child_set_property (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *property_name,
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const GValue *value)
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{
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ClutterChildMeta *meta;
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GObjectClass *klass;
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GParamSpec *pspec;
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g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
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g_return_if_fail (CLUTTER_IS_CONTAINER (container));
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g_return_if_fail (CLUTTER_IS_ACTOR (actor));
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g_return_if_fail (property_name != NULL);
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g_return_if_fail (value != NULL);
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meta = get_child_meta (manager, container, actor);
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if (meta == NULL)
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{
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g_warning ("Layout managers of type '%s' do not support "
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"child metadata",
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g_type_name (G_OBJECT_TYPE (manager)));
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return;
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}
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klass = G_OBJECT_GET_CLASS (meta);
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pspec = g_object_class_find_property (klass, property_name);
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if (pspec == NULL)
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{
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g_warning ("%s: Layout managers of type '%s' have no child "
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"property named '%s'",
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G_STRLOC, G_OBJECT_TYPE_NAME (manager), property_name);
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return;
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}
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layout_set_property_internal (manager, G_OBJECT (meta), pspec, value);
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}
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void
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clutter_layout_manager_child_get (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *first_property,
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...)
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{
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ClutterChildMeta *meta;
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GObjectClass *klass;
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const gchar *pname;
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va_list var_args;
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g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
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g_return_if_fail (CLUTTER_IS_CONTAINER (container));
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g_return_if_fail (CLUTTER_IS_ACTOR (actor));
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g_return_if_fail (first_property != NULL);
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meta = get_child_meta (manager, container, actor);
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if (meta == NULL)
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{
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g_warning ("Layout managers of type '%s' do not support "
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"child metadata",
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g_type_name (G_OBJECT_TYPE (manager)));
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return;
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}
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klass = G_OBJECT_GET_CLASS (meta);
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va_start (var_args, first_property);
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pname = first_property;
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while (pname)
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{
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GValue value = { 0, };
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GParamSpec *pspec;
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gchar *error;
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gboolean res;
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pspec = g_object_class_find_property (klass, pname);
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if (pspec == NULL)
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{
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g_warning ("%s: Layout managers of type '%s' have no child "
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"property named '%s'",
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G_STRLOC, G_OBJECT_TYPE_NAME (manager), pname);
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break;
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}
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g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
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res = layout_get_property_internal (manager, G_OBJECT (meta),
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pspec,
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&value);
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if (!res)
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{
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g_value_unset (&value);
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break;
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}
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G_VALUE_LCOPY (&value, var_args, 0, &error);
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if (error)
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{
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g_warning ("%s: %s", G_STRLOC, error);
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g_free (error);
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g_value_unset (&value);
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break;
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}
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g_value_unset (&value);
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pname = va_arg (var_args, gchar*);
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}
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va_end (var_args);
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}
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void
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clutter_layout_manager_child_get_property (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *property_name,
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GValue *value)
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{
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ClutterChildMeta *meta;
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GObjectClass *klass;
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GParamSpec *pspec;
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g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
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g_return_if_fail (CLUTTER_IS_CONTAINER (container));
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g_return_if_fail (CLUTTER_IS_ACTOR (actor));
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g_return_if_fail (property_name != NULL);
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g_return_if_fail (value != NULL);
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meta = get_child_meta (manager, container, actor);
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if (meta == NULL)
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{
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g_warning ("Layout managers of type %s do not support "
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"child metadata",
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g_type_name (G_OBJECT_TYPE (manager)));
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return;
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}
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klass = G_OBJECT_GET_CLASS (meta);
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pspec = g_object_class_find_property (klass, property_name);
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if (pspec == NULL)
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{
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g_warning ("%s: Layout managers of type '%s' have no child "
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"property named '%s'",
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G_STRLOC, G_OBJECT_TYPE_NAME (manager), property_name);
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return;
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}
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layout_get_property_internal (manager, G_OBJECT (meta), pspec, value);
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}
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@ -69,6 +69,9 @@ struct _ClutterLayoutManager
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* @allocate: virtual function; override to allocate the children of the
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* layout manager. See also the allocate() virtual function in
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* #ClutterActor
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* @get_child_meta: virtual function; override to create a #ClutterChildMeta
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* instance associated to a #ClutterContainer and a child #ClutterActor,
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* used to maintain layout manager specific properties
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* @layout_changed: class handler for the #ClutterLayoutManager::layout-changed
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* signal
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*
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@ -83,22 +86,26 @@ struct _ClutterLayoutManagerClass
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GInitiallyUnownedClass parent_class;
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/*< public >*/
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void (* get_preferred_width) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *minimum_width_p,
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gfloat *natural_width_p);
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void (* get_preferred_height) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *minimum_height_p,
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gfloat *natural_height_p);
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void (* allocate) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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const ClutterActorBox *allocation,
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ClutterAllocationFlags flags);
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void (* get_preferred_width) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *minimum_width_p,
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gfloat *natural_width_p);
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void (* get_preferred_height) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *minimum_height_p,
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gfloat *natural_height_p);
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void (* allocate) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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const ClutterActorBox *allocation,
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ClutterAllocationFlags flags);
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void (* layout_changed) (ClutterLayoutManager *manager);
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ClutterChildMeta *(* create_child_meta) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor);
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void (* layout_changed) (ClutterLayoutManager *manager);
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/*< private >*/
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/* padding for future expansion */
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@ -114,22 +121,43 @@ struct _ClutterLayoutManagerClass
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GType clutter_layout_manager_get_type (void) G_GNUC_CONST;
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void clutter_layout_manager_get_preferred_width (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *min_width_p,
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gfloat *nat_width_p);
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void clutter_layout_manager_get_preferred_height (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *min_height_p,
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gfloat *nat_height_p);
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void clutter_layout_manager_allocate (ClutterLayoutManager *manager,
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ClutterContainer *container,
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const ClutterActorBox *allocation,
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ClutterAllocationFlags flags);
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void clutter_layout_manager_get_preferred_width (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *min_width_p,
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gfloat *nat_width_p);
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void clutter_layout_manager_get_preferred_height (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *min_height_p,
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gfloat *nat_height_p);
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void clutter_layout_manager_allocate (ClutterLayoutManager *manager,
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ClutterContainer *container,
|
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const ClutterActorBox *allocation,
|
||||
ClutterAllocationFlags flags);
|
||||
|
||||
void clutter_layout_manager_layout_changed (ClutterLayoutManager *manager);
|
||||
void clutter_layout_manager_layout_changed (ClutterLayoutManager *manager);
|
||||
|
||||
ClutterChildMeta *clutter_layout_manager_get_child_meta (ClutterLayoutManager *manager,
|
||||
ClutterContainer *container,
|
||||
ClutterActor *actor);
|
||||
void clutter_layout_manager_add_child_meta (ClutterLayoutManager *manager,
|
||||
ClutterContainer *container,
|
||||
ClutterActor *actor);
|
||||
void clutter_layout_manager_remove_child_meta (ClutterLayoutManager *manager,
|
||||
ClutterContainer *container,
|
||||
ClutterActor *actor);
|
||||
|
||||
void clutter_layout_manager_child_set_property (ClutterLayoutManager *manager,
|
||||
ClutterContainer *container,
|
||||
ClutterActor *actor,
|
||||
const gchar *property_name,
|
||||
const GValue *value);
|
||||
void clutter_layout_manager_child_get_property (ClutterLayoutManager *manager,
|
||||
ClutterContainer *container,
|
||||
ClutterActor *actor,
|
||||
const gchar *property_name,
|
||||
GValue *value);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
|
|
|
|||
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Reference in a new issue