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* Copyright (C) 2004 Vivien Malerba
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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#include "mg-graph-item.h"
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#include <libmergeant/mg-ref-base.h>
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#include <libmergeant/mg-xml-storage.h>
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* Main static functions
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static void mg_graph_item_class_init (MgGraphItemClass *class);
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static void mg_graph_item_init (MgGraphItem *graph);
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static void mg_graph_item_dispose (GObject *object);
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static void mg_graph_item_finalize (GObject *object);
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static void mg_graph_item_set_property (GObject *object,
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static void mg_graph_item_get_property (GObject *object,
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/* XML storage interface */
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static void mg_graph_item_xml_storage_init (MgXmlStorageIface *iface);
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static xmlNodePtr mg_graph_item_save_to_xml (MgXmlStorage *iface, GError **error);
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static gboolean mg_graph_item_load_from_xml (MgXmlStorage *iface, xmlNodePtr node, GError **error);
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static void mg_graph_item_dump (MgGraphItem *graph, guint offset);
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/* get a pointer to the parents to be able to call their destructor */
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static GObjectClass *parent_class = NULL;
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static gint mg_graph_item_signals[LAST_SIGNAL] = { 0 };
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struct _MgGraphItemPrivate
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MgRefBase *ref_object;
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GQuark mg_graph_item_error_quark (void)
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quark = g_quark_from_static_string ("mg_graph_item_error");
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mg_graph_item_get_type (void)
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static GType type = 0;
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static const GTypeInfo info = {
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sizeof (MgGraphItemClass),
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) mg_graph_item_class_init,
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sizeof (MgGraphItem),
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(GInstanceInitFunc) mg_graph_item_init
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static const GInterfaceInfo xml_storage_info = {
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(GInterfaceInitFunc) mg_graph_item_xml_storage_init,
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type = g_type_register_static (MG_BASE_TYPE, "MgGraphItem", &info, 0);
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g_type_add_interface_static (type, MG_XML_STORAGE_TYPE, &xml_storage_info);
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mg_graph_item_xml_storage_init (MgXmlStorageIface *iface)
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iface->get_xml_id = NULL;
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iface->save_to_xml = mg_graph_item_save_to_xml;
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iface->load_from_xml = mg_graph_item_load_from_xml;
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mg_graph_item_class_init (MgGraphItemClass * class)
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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parent_class = g_type_class_peek_parent (class);
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mg_graph_item_signals[MOVED] =
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g_signal_new ("moved",
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G_TYPE_FROM_CLASS (object_class),
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G_STRUCT_OFFSET (MgGraphItemClass, moved),
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marshal_VOID__VOID, G_TYPE_NONE, 0);
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object_class->dispose = mg_graph_item_dispose;
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object_class->finalize = mg_graph_item_finalize;
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object_class->set_property = mg_graph_item_set_property;
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object_class->get_property = mg_graph_item_get_property;
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g_object_class_install_property (object_class, PROP_REF_OBJECT,
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g_param_spec_pointer ("ref_object", NULL, NULL,
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(G_PARAM_READABLE | G_PARAM_WRITABLE)));
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/* virtual functions */
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MG_BASE_CLASS (class)->dump = (void (*)(MgBase *, guint)) mg_graph_item_dump;
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mg_graph_item_init (MgGraphItem *graph)
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graph->priv = g_new0 (MgGraphItemPrivate, 1);
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graph->priv->ref_object = NULL;
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* @conf: a #MgConf object
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* @ref_obj: a #MgBase object which the new item will reference, or %NULL.
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* Creates a new #MgGraphItem object
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* Returns: the newly created object
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mg_graph_item_new (MgConf *conf, MgBase *ref_obj)
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g_return_val_if_fail (conf && IS_MG_CONF (conf), NULL);
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g_return_val_if_fail (IS_MG_BASE (ref_obj), NULL);
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obj = g_object_new (MG_GRAPH_ITEM_TYPE, "conf", conf, NULL);
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item = MG_GRAPH_ITEM (obj);
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item->priv->ref_object = MG_REF_BASE (mg_ref_base_new (conf));
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mg_ref_base_set_ref_object (item->priv->ref_object, ref_obj);
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mg_graph_item_dispose (GObject *object)
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g_return_if_fail (object != NULL);
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g_return_if_fail (IS_MG_GRAPH_ITEM (object));
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graph = MG_GRAPH_ITEM (object);
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if (graph->priv->ref_object) {
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g_object_unref (G_OBJECT (graph->priv->ref_object));
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graph->priv->ref_object = NULL;
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parent_class->dispose (object);
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mg_graph_item_finalize (GObject * object)
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g_return_if_fail (object != NULL);
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g_return_if_fail (IS_MG_GRAPH_ITEM (object));
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graph = MG_GRAPH_ITEM (object);
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g_free (graph->priv);
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parent_class->finalize (object);
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mg_graph_item_set_property (GObject *object,
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graph = MG_GRAPH_ITEM (object);
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case PROP_REF_OBJECT:
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g_assert (graph->priv->ref_object);
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if (graph->priv->ref_object) {
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ptr = g_value_get_pointer (value);
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mg_ref_base_set_ref_object (graph->priv->ref_object, ptr);
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mg_graph_item_get_property (GObject *object,
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graph = MG_GRAPH_ITEM (object);
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case PROP_REF_OBJECT:
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g_assert (graph->priv->ref_object);
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g_value_set_pointer (value,
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mg_ref_base_get_ref_object (graph->priv->ref_object));
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* mg_graph_item_set_position
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* @item: a #MgGraphItemItem object
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* Sets the position to be remembered for @item.
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mg_graph_item_set_position (MgGraphItem *item, gdouble x, gdouble y)
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g_return_if_fail (item && IS_MG_GRAPH_ITEM (item));
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g_return_if_fail (item->priv);
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if ((item->priv->x == x) && (item->priv->y == y))
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g_print (">> 'MOVED' from %s::%s()\n", __FILE__, __FUNCTION__);
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g_signal_emit (G_OBJECT (item), mg_graph_item_signals[MOVED], 0);
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g_print ("<< 'MOVED' from %s::%s()\n", __FILE__, __FUNCTION__);
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* mg_graph_item_get_position
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* @item: a #MgGraphItemItem object
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* @x: a place where to store the X part of the position, or %NULL
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* @y: a place where to store the Y part of the position, or %NULL
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* Get @item's position.
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mg_graph_item_get_position (MgGraphItem *item, gdouble *x, gdouble *y)
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g_return_if_fail (item && IS_MG_GRAPH_ITEM (item));
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g_return_if_fail (item->priv);
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* mg_graph_item_get_ref_object
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* @item: a #MgGraphItem object
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* Get the referenced #MgBase object, if it exists.
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* Returns: the referenced object, or %NULL
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mg_graph_item_get_ref_object (MgGraphItem *item)
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g_return_val_if_fail (item && IS_MG_GRAPH_ITEM (item), NULL);
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g_return_val_if_fail (item->priv, NULL);
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return mg_ref_base_get_ref_object (item->priv->ref_object);
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mg_graph_item_dump (MgGraphItem *item, guint offset)
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g_return_if_fail (item && IS_MG_GRAPH_ITEM (item));
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/* string for the offset */
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str = g_new0 (gchar, offset+1);
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for (i=0; i<offset; i++)
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MgBase *base = mg_ref_base_get_ref_object (item->priv->ref_object);
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g_print ("%s" D_COL_H1 "MgGraphItem" D_COL_NOR " for %p at (%.3f, %.3f) ", str, base,
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item->priv->x, item->priv->y);
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g_print ("%s" D_COL_ERR "Using finalized object %p" D_COL_NOR, str, item);
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* MgXmlStorage interface implementation
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mg_graph_item_save_to_xml (MgXmlStorage *iface, GError **error)
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xmlNodePtr node = NULL;
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g_return_val_if_fail (iface && IS_MG_GRAPH_ITEM (iface), NULL);
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g_return_val_if_fail (MG_GRAPH_ITEM (iface)->priv, NULL);
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item = MG_GRAPH_ITEM (iface);
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node = xmlNewNode (NULL, "MG_GRAPH_ITEM");
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g_assert (item->priv->ref_object);
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base = mg_ref_base_get_ref_object (item->priv->ref_object);
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str = mg_xml_storage_get_xml_id (MG_XML_STORAGE (base));
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xmlSetProp (node, "object", str);
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str = g_strdup_printf ("%.3f", item->priv->x);
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xmlSetProp (node, "xpos", str);
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str = g_strdup_printf ("%.3f", item->priv->y);
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xmlSetProp (node, "ypos", str);
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mg_graph_item_load_from_xml (MgXmlStorage *iface, xmlNodePtr node, GError **error)
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g_return_val_if_fail (iface && IS_MG_GRAPH_ITEM (iface), FALSE);
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g_return_val_if_fail (MG_GRAPH_ITEM (iface)->priv, FALSE);
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g_return_val_if_fail (node, FALSE);
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item = MG_GRAPH_ITEM (iface);
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if (strcmp (node->name, "MG_GRAPH_ITEM")) {
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MG_GRAPH_ITEM_XML_LOAD_ERROR,
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_("XML Tag is not <MG_GRAPH_ITEM>"));
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prop = xmlGetProp (node, "object");
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g_assert (item->priv->ref_object);
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mg_ref_base_set_ref_name (item->priv->ref_object, 0/* FIXME */, REFERENCE_BY_XML_ID, prop);
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prop = xmlGetProp (node, "xpos");
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item->priv->x = atof (prop);
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prop = xmlGetProp (node, "ypos");
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item->priv->y = atof (prop);
added
removed
libmergeant/graph/mg-graph-item.c
