Added initialize_value and value_is_empty callbacks.

2000-05-19  Christopher James Lahey  <clahey@helixcode.com>

	* contact-editor/e-contact-editor-categories.c,
	gui/component/e-addressbook-model.c: Added initialize_value and
	value_is_empty callbacks.

svn path=/trunk/; revision=3139

3 files changed, 50 insertions, 0 deletions

diff --git a/addressbook/gui/component/e-addressbook-model.c b/addressbook/gui/component/e-addressbook-model.c
index b2f7332c52..598f6786cf 100644
--- a/addressbook/gui/component/e-addressbook-model.c
+++ b/addressbook/gui/component/e-addressbook-model.c
@@ -125,6 +125,18 @@ addressbook_free_value (ETableModel *etc, int col, void *value)
 	g_free(value);
 }
 
+static void *
+addressbook_initialize_value (ETableModel *etc, int col)
+{
+	return g_strdup("");
+}
+
+static gboolean
+addressbook_value_is_empty (ETableModel *etc, int col, const void *value)
+{
+	return !(value && *(char *)value);
+}
+
 /* This function is for when the model is unfrozen.  This can mostly
    be ignored for simple models.  */
 static void
@@ -201,6 +213,8 @@ e_addressbook_model_class_init (GtkObjectClass *object_class)
 	model_class->is_cell_editable = addressbook_is_cell_editable;
 	model_class->duplicate_value = addressbook_duplicate_value;
 	model_class->free_value = addressbook_free_value;
+	model_class->initialize_value = addressbook_initialize_value;
+	model_class->value_is_empty = addressbook_value_is_empty;
 	model_class->thaw = addressbook_thaw;
 }
 
diff --git a/addressbook/gui/contact-editor/e-contact-editor-categories.c b/addressbook/gui/contact-editor/e-contact-editor-categories.c
index 3287672861..831fbce2b9 100644
--- a/addressbook/gui/contact-editor/e-contact-editor-categories.c
+++ b/addressbook/gui/contact-editor/e-contact-editor-categories.c
@@ -40,6 +40,8 @@ static void e_contact_editor_categories_set_value_at (ETableModel *etc, int col,
 static gboolean e_contact_editor_categories_is_cell_editable (ETableModel *etc, int col, int row, gpointer data);
 static void *e_contact_editor_categories_duplicate_value (ETableModel *etc, int col, const void *value, gpointer data);
 static void e_contact_editor_categories_free_value (ETableModel *etc, int col, void *value, gpointer data);
+static void *e_contact_editor_categories_initialize_value (ETableModel *etc, int col, gpointer data);
+static gboolean e_contact_editor_categories_value_is_empty (ETableModel *etc, int col, const void *value, gpointer data);
 static void e_contact_editor_categories_thaw (ETableModel *etc, gpointer data);
 
 static GnomeDialogClass *parent_class = NULL;
@@ -271,6 +273,8 @@ e_contact_editor_categories_init (EContactEditorCategories *categories)
 					       e_contact_editor_categories_is_cell_editable,
 					       e_contact_editor_categories_duplicate_value,
 					       e_contact_editor_categories_free_value,
+					       e_contact_editor_categories_initialize_value,
+					       e_contact_editor_categories_value_is_empty,
 					       e_contact_editor_categories_thaw, 
 					       categories);
 
@@ -435,6 +439,24 @@ e_contact_editor_categories_free_value (ETableModel *etc, int col, void *value,
 		g_free(value);
 }
 
+static void *
+e_contact_editor_categories_initialize_value (ETableModel *etc, int col, gpointer data)
+{
+	if (col == 0)
+		return NULL;
+	else
+		return g_strdup("");
+}
+
+static gboolean
+e_contact_editor_categories_value_is_empty (ETableModel *etc, int col, const void *value, gpointer data)
+{
+	if (col == 0)
+		return value == NULL;
+	else
+		return !(value && *(char *)value);
+}
+
 /* This function is for when the model is unfrozen.  This can mostly
    be ignored for simple models.  */
 static void
diff --git a/addressbook/gui/widgets/e-addressbook-model.c b/addressbook/gui/widgets/e-addressbook-model.c
index b2f7332c52..598f6786cf 100644
--- a/addressbook/gui/widgets/e-addressbook-model.c
+++ b/addressbook/gui/widgets/e-addressbook-model.c
@@ -125,6 +125,18 @@ addressbook_free_value (ETableModel *etc, int col, void *value)
 	g_free(value);
 }
 
+static void *
+addressbook_initialize_value (ETableModel *etc, int col)
+{
+	return g_strdup("");
+}
+
+static gboolean
+addressbook_value_is_empty (ETableModel *etc, int col, const void *value)
+{
+	return !(value && *(char *)value);
+}
+
 /* This function is for when the model is unfrozen.  This can mostly
    be ignored for simple models.  */
 static void
@@ -201,6 +213,8 @@ e_addressbook_model_class_init (GtkObjectClass *object_class)
 	model_class->is_cell_editable = addressbook_is_cell_editable;
 	model_class->duplicate_value = addressbook_duplicate_value;
 	model_class->free_value = addressbook_free_value;
+	model_class->initialize_value = addressbook_initialize_value;
+	model_class->value_is_empty = addressbook_value_is_empty;
 	model_class->thaw = addressbook_thaw;
 }