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GtkComboBox: Improve gtk_combo_box_set_active_id

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- Passing a NULL ID string should be equivalent to
  gtk_combo_box_set_active (combo_box, -1).
- Use g_strcmp0() instead of strcmp() when comparing
  ID strings to avoid a crash when an ID is NULL.
- Return a boolean indicating if the ID was found or not.

https://bugzilla.gnome.org/show_bug.cgi?id=647806
This commit is contained in:
Matthew Barnes 2011-04-26 07:59:53 -04:00 committed by Matthias Clasen
parent 54c3f05848
commit 7ae4a06d1f
2 changed files with 31 additions and 15 deletions
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44
gtk/gtkcombobox.c
View File

@ -5594,15 +5594,16 @@ gtk_combo_box_get_id_column (GtkComboBox *combo_box)
* @combo_box: a #GtkComboBox
*
* Returns the ID of the active row of @combo_box. This value is taken
* from the active row and the column specified by the 'id-column'
* from the active row and the column specified by the #GtkComboBox:id-column
* property of @combo_box (see gtk_combo_box_set_id_column()).
*
* The returned value is an interned string which means that you can
* compare the pointer by value to other interned strings and that you
* must not free it.
*
* If the 'id-column' property of @combo_box is not set or if no row is
* selected then %NULL is returned.
* If the #GtkComboBox:id-column property of @combo_box is not set, or if
* no row is active, or if the active row has a %NULL ID value, then %NULL
* is returned.
*
* Return value: the ID of the active row, or %NULL
*
@ -5644,41 +5645,54 @@ gtk_combo_box_get_active_id (GtkComboBox *combo_box)
/**
* gtk_combo_box_set_active_id:
* @combo_box: a #GtkComboBox
* @active_id: the ID of the row to select
* @active_id: (allow-none): the ID of the row to select, or %NULL
*
* Changes the active row of @combo_box to the one that has an ID equal to @id.
* Changes the active row of @combo_box to the one that has an ID equal to
* @active_id, or unsets the active row if @active_id is %NULL. Rows having
* a %NULL ID string cannot be made active by this function.
*
* If the 'id-column' property of @combo_box is unset or if no row has
* the given ID then nothing happens.
* If the #GtkComboBox:id-column property of @combo_box is unset or if no
* row has the given ID then the function does nothing and returns %FALSE.
*
* Returns: %TRUE if a row with a matching ID was found. If a %NULL
* @active_id was given to unset the active row, the function
* always returns %TRUE.
*
* Since: 3.0
**/
void
gboolean
gtk_combo_box_set_active_id (GtkComboBox *combo_box,
const gchar *active_id)
{
GtkTreeModel *model;
GtkTreeIter iter;
gboolean match = FALSE;
gint column;
g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
if (active_id == NULL)
{
gtk_combo_box_set_active (combo_box, -1);
return TRUE; /* active row was successfully unset */
}
column = combo_box->priv->id_column;
if (column < 0)
return;
return FALSE;
model = gtk_combo_box_get_model (combo_box);
g_return_if_fail (gtk_tree_model_get_column_type (model, column) ==
G_TYPE_STRING);
g_return_val_if_fail (gtk_tree_model_get_column_type (model, column) ==
G_TYPE_STRING, FALSE);
if (gtk_tree_model_get_iter_first (model, &iter))
do {
gboolean match;
gchar *id;
gtk_tree_model_get (model, &iter, column, &id, -1);
match = strcmp (id, active_id) == 0;
if (id != NULL)
match = strcmp (id, active_id) == 0;
g_free (id);
if (match)
@ -5687,4 +5701,6 @@ gtk_combo_box_set_active_id (GtkComboBox *combo_box,
break;
}
} while (gtk_tree_model_iter_next (model, &iter));
return match;
}

2
gtk/gtkcombobox.h
View File

@ -140,7 +140,7 @@ gint gtk_combo_box_get_id_column (GtkComboBox *combo_box);
void gtk_combo_box_set_id_column (GtkComboBox *combo_box,
gint id_column);
const gchar * gtk_combo_box_get_active_id (GtkComboBox *combo_box);
void gtk_combo_box_set_active_id (GtkComboBox *combo_box,
gboolean gtk_combo_box_set_active_id (GtkComboBox *combo_box,
const gchar *active_id);
G_END_DECLS