tree: Set search column to 1 for check/radiolists

We expand 91a6c185 to apply to check/radiolists as the first column
(ie, true/false) gets selected as the search column by default unless it
is explicitly set.

nb: Although acc. to the GtkTreeView docs, the default property for
'search-column' is -1 (ie, disable search) it seems that gtktreeview.c
will auotmatically select the first available column as being searchable
(ie, 0) so it is not necessary to explicitly set this property to 0 in
other non-image/radio/checklist cases.

Fixes #49

1 files changed, 4 insertions, 4 deletions

diff --git a/src/tree.c b/src/tree.c
index 7d98ad2d..d3efe573 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -642,10 +642,10 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data) {
 				tree_data->editable);
 	}
 
-	/* GTK will automatically pick the image column as the search column
-	 * despite it not containing any user readable text.
-	 * Set it to second column instead if it exists. */
-	if (tree_data->imagebox && n_columns > 1) {
+	/* GTK will automatically pick the image/checkbox/radiobox column as the
+	 * search column despite it not containing any user readable text.
+	 * Set it to second column instead if any of the above exists. */
+	if ((tree_data->imagebox || tree_data->radiobox || tree_data->checkbox) && n_columns > 1) {
 		gtk_tree_view_set_search_column (GTK_TREE_VIEW (tree_view),
 			1);
 	}