From e364267010db1242757f67ad9c7aef5abc2c3103 Mon Sep 17 00:00:00 2001 From: Přemysl Janouch Date: Sat, 11 Dec 2010 15:00:48 +0100 Subject: Add a "modified" property to LdDocument. The property is set to TRUE whenever the document changes. The user may set it back to FALSE with ld_document_set_modified(). Also don't emit the "changed" signal when nothing has happened. --- src/ld-document.c | 158 ++++++++++++++++++++++++++++++++++++++++++++++++------ src/ld-document.h | 6 +++ 2 files changed, 148 insertions(+), 16 deletions(-) diff --git a/src/ld-document.c b/src/ld-document.c index dbd367e..54c0ff9 100644 --- a/src/ld-document.c +++ b/src/ld-document.c @@ -27,12 +27,15 @@ /* * LdDocumentPrivate: + * @modified: Whether the document has been modified. * @objects: All the objects in the document. * @selection: All currently selected objects. * @connections: Connections between objects. */ struct _LdDocumentPrivate { + gboolean modified; + GSList *objects; GSList *selection; GSList *connections; @@ -40,18 +43,47 @@ struct _LdDocumentPrivate G_DEFINE_TYPE (LdDocument, ld_document, G_TYPE_OBJECT); -static void -ld_document_finalize (GObject *gobject); +enum +{ + PROP_0, + PROP_MODIFIED +}; + +static void ld_document_get_property (GObject *object, guint property_id, + GValue *value, GParamSpec *pspec); +static void ld_document_set_property (GObject *object, guint property_id, + const GValue *value, GParamSpec *pspec); +static void ld_document_dispose (GObject *gobject); +static void ld_document_finalize (GObject *gobject); + +static void ld_document_real_changed (LdDocument *self); +static void ld_document_clear_internal (LdDocument *self); static void ld_document_class_init (LdDocumentClass *klass) { GObjectClass *object_class; + GParamSpec *pspec; object_class = G_OBJECT_CLASS (klass); + object_class->get_property = ld_document_get_property; + object_class->set_property = ld_document_set_property; + object_class->dispose = ld_document_dispose; object_class->finalize = ld_document_finalize; + klass->changed = ld_document_real_changed; + +/** + * LdDocument:modified: + * + * Whether the document has been modified. + */ + pspec = g_param_spec_boolean ("modified", "Modified", + "Whether the document has been modified.", + FALSE, G_PARAM_READWRITE); + g_object_class_install_property (object_class, PROP_MODIFIED, pspec); + /** * LdDocument::changed: * @document: The document object. @@ -61,7 +93,8 @@ ld_document_class_init (LdDocumentClass *klass) klass->changed_signal = g_signal_new ("changed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, - 0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + G_STRUCT_OFFSET (LdDocumentClass, changed), NULL, NULL, + g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); g_type_class_add_private (klass, sizeof (LdDocumentPrivate)); } @@ -74,17 +107,67 @@ ld_document_init (LdDocument *self) } static void -ld_document_finalize (GObject *gobject) +ld_document_get_property (GObject *object, guint property_id, + GValue *value, GParamSpec *pspec) +{ + LdDocument *self; + + self = LD_DOCUMENT (object); + switch (property_id) + { + case PROP_MODIFIED: + g_value_set_boolean (value, ld_document_get_modified (self)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + } +} + +static void +ld_document_set_property (GObject *object, guint property_id, + const GValue *value, GParamSpec *pspec) +{ + LdDocument *self; + + self = LD_DOCUMENT (object); + switch (property_id) + { + case PROP_MODIFIED: + ld_document_set_modified (self, g_value_get_boolean (value)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + } +} + +static void +ld_document_dispose (GObject *gobject) { LdDocument *self; self = LD_DOCUMENT (gobject); - ld_document_clear (self); + ld_document_clear_internal (self); + /* Chain up to the parent class. */ + G_OBJECT_CLASS (ld_document_parent_class)->dispose (gobject); +} + +static void +ld_document_finalize (GObject *gobject) +{ /* Chain up to the parent class. */ G_OBJECT_CLASS (ld_document_parent_class)->finalize (gobject); } +static void +ld_document_real_changed (LdDocument *self) +{ + g_return_if_fail (LD_IS_DOCUMENT (self)); + + ld_document_set_modified (self, TRUE); +} + + /** * ld_document_new: * @@ -107,6 +190,21 @@ ld_document_clear (LdDocument *self) { g_return_if_fail (LD_IS_DOCUMENT (self)); + ld_document_clear_internal (self); + + g_signal_emit (self, + LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); +} + +/* + * ld_document_clear_internal: + * @self: An #LdDocument object. + * + * Do the same what ld_document_clear() does but don't emit signals. + */ +static void +ld_document_clear_internal (LdDocument *self) +{ g_slist_free (self->priv->connections); self->priv->connections = NULL; @@ -117,9 +215,6 @@ ld_document_clear (LdDocument *self) g_slist_foreach (self->priv->objects, (GFunc) g_object_unref, NULL); g_slist_free (self->priv->objects); self->priv->objects = NULL; - - g_signal_emit (self, - LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } /** @@ -162,6 +257,33 @@ ld_document_save_to_file (LdDocument *self, return FALSE; } +/** + * ld_document_get_modified: + * @self: An #LdDocument object. + * + * Return value: The modification status of document. + */ +gboolean +ld_document_get_modified (LdDocument *self) +{ + g_return_val_if_fail (LD_IS_DOCUMENT (self), FALSE); + return self->priv->modified; +} + +/** + * ld_document_set_modified: + * @self: An #LdDocument object. + * @value: Whether the document has been modified. + * + * Set the modification status of document. + */ +void +ld_document_set_modified (LdDocument *self, gboolean value) +{ + g_return_if_fail (LD_IS_DOCUMENT (self)); + self->priv->modified = value; +} + /** * ld_document_get_objects: * @self: An #LdDocument object. @@ -196,9 +318,10 @@ ld_document_insert_object (LdDocument *self, LdDocumentObject *object, gint pos) self->priv->objects = g_slist_insert (self->priv->objects, object, pos); g_object_ref (object); + + g_signal_emit (self, + LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } - g_signal_emit (self, - LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } /** @@ -220,9 +343,10 @@ ld_document_remove_object (LdDocument *self, LdDocumentObject *object) self->priv->objects = g_slist_remove (self->priv->objects, object); g_object_unref (object); + + g_signal_emit (self, + LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } - g_signal_emit (self, - LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } /** @@ -260,9 +384,10 @@ ld_document_selection_add (LdDocument *self, LdDocumentObject *object, gint pos) self->priv->selection = g_slist_insert (self->priv->selection, object, pos); g_object_ref (object); + + g_signal_emit (self, + LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } - g_signal_emit (self, - LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } /** @@ -282,7 +407,8 @@ ld_document_selection_remove (LdDocument *self, LdDocumentObject *object) { self->priv->selection = g_slist_remove (self->priv->selection, object); g_object_unref (object); + + g_signal_emit (self, + LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } - g_signal_emit (self, - LD_DOCUMENT_GET_CLASS (self)->changed_signal, 0); } diff --git a/src/ld-document.h b/src/ld-document.h index 12d59cb..a27fe23 100644 --- a/src/ld-document.h +++ b/src/ld-document.h @@ -48,7 +48,10 @@ struct _LdDocumentClass /*< private >*/ GObjectClass parent_class; + /* FIXME: Add a selection_changed signal? */ guint changed_signal; + + void (*changed) (LdDocument *self); }; @@ -61,6 +64,9 @@ gboolean ld_document_load_from_file (LdDocument *self, gboolean ld_document_save_to_file (LdDocument *self, const gchar *filename, GError *error); +gboolean ld_document_get_modified (LdDocument *self); +void ld_document_set_modified (LdDocument *self, gboolean value); + GSList *ld_document_get_objects (LdDocument *self); void ld_document_insert_object (LdDocument *self, LdDocumentObject *object, gint pos); -- cgit v1.2.3-70-g09d2