Bug 526987 - GtkCellRendererCombo should allow model to be NULL

2008-06-09  Kristian Rietveld  <kris@gtk.org>

	Bug 526987 - GtkCellRendererCombo should allow model to be NULL

	* gtk/gtkcellrenderercombo.c (gtk_cell_renderer_combo_class_init),
	(gtk_cell_renderer_combo_set_property),
	(gtk_cell_renderer_combo_editing_done),
	(gtk_cell_renderer_combo_start_editing): introduce private class
	struct, allow model to be set to NULL.


svn path=/trunk/; revision=20340

1 files changed, 65 insertions, 16 deletions

diff --git a/gtk/gtkcellrenderercombo.c b/gtk/gtkcellrenderercombo.c
index 6411ef2618..104dbb5b6c 100644
--- a/gtk/gtkcellrenderercombo.c
+++ b/gtk/gtkcellrenderercombo.c
@@ -32,6 +32,16 @@
 #include "gtkprivate.h"
 #include "gtkalias.h"
 
+
+#define GTK_CELL_RENDERER_COMBO_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_CELL_RENDERER_COMBO, GtkCellRendererComboPrivate))
+
+typedef struct _GtkCellRendererComboPrivate GtkCellRendererComboPrivate;
+struct _GtkCellRendererComboPrivate
+{
+  GtkWidget *combo;
+};
+
+
 static void gtk_cell_renderer_combo_class_init (GtkCellRendererComboClass *klass);
 static void gtk_cell_renderer_combo_init       (GtkCellRendererCombo      *self);
 static void gtk_cell_renderer_combo_finalize     (GObject      *object);
@@ -173,6 +183,8 @@ gtk_cell_renderer_combo_class_init (GtkCellRendererComboClass *klass)
 		  G_TYPE_NONE, 2,
 		  G_TYPE_STRING,
 		  GTK_TYPE_TREE_ITER);
+
+  g_type_class_add_private (klass, sizeof (GtkCellRendererComboPrivate));
 }
 
 static void
@@ -257,17 +269,28 @@ gtk_cell_renderer_combo_set_property (GObject      *object,
     case PROP_MODEL:
       {
 	GObject *object;
+        GtkCellRendererComboPrivate *priv;
 
-	object = g_value_get_object (value);
-	g_return_if_fail (GTK_IS_TREE_MODEL (object));
-	g_object_ref (object);
+        priv = GTK_CELL_RENDERER_COMBO_GET_PRIVATE (cell);
 
 	if (cell->model)
 	  {
+            if (priv->combo)
+              gtk_combo_box_set_model (GTK_COMBO_BOX (priv->combo), NULL);
 	    g_object_unref (cell->model);
 	    cell->model = NULL;
 	  }
-	cell->model = GTK_TREE_MODEL (object);
+
+	object = g_value_get_object (value);
+        if (object)
+          {
+            g_return_if_fail (GTK_IS_TREE_MODEL (object));
+            g_object_ref (object);
+
+            cell->model = GTK_TREE_MODEL (object);
+            if (priv->combo)
+              gtk_combo_box_set_model (GTK_COMBO_BOX (priv->combo), cell->model);
+          }
 	break;
       }
     case PROP_TEXT_COLUMN:
@@ -312,8 +335,10 @@ gtk_cell_renderer_combo_editing_done (GtkCellEditable *combo,
   GtkCellRendererCombo *cell;
   GtkEntry *entry;
   gboolean canceled;
+  GtkCellRendererComboPrivate *priv;
 
   cell = GTK_CELL_RENDERER_COMBO (data);
+  priv = GTK_CELL_RENDERER_COMBO_GET_PRIVATE (data);
 
   if (cell->focus_out_id > 0)
     {
@@ -324,7 +349,10 @@ gtk_cell_renderer_combo_editing_done (GtkCellEditable *combo,
   canceled = _gtk_combo_box_editing_canceled (GTK_COMBO_BOX (combo));
   gtk_cell_renderer_stop_editing (GTK_CELL_RENDERER (data), canceled);
   if (canceled)
-    return;
+    {
+      priv->combo = NULL;
+      return;
+    }
 
   if (GTK_IS_COMBO_BOX_ENTRY (combo))
     {
@@ -334,13 +362,17 @@ gtk_cell_renderer_combo_editing_done (GtkCellEditable *combo,
   else 
     {
       model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo));
-      if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo), &iter))
-	gtk_tree_model_get (model, &iter, cell->text_column, &new_text, -1);
+
+      if (model
+          && gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo), &iter))
+        gtk_tree_model_get (model, &iter, cell->text_column, &new_text, -1);
     }
 
   path = g_object_get_data (G_OBJECT (combo), GTK_CELL_RENDERER_COMBO_PATH);
   g_signal_emit_by_name (cell, "edited", path, new_text);
 
+  priv->combo = NULL;
+
   g_free (new_text);
 }
 
@@ -397,18 +429,26 @@ gtk_cell_renderer_combo_start_editing (GtkCellRenderer     *cell,
   GtkCellRendererText *cell_text;
   GtkWidget *combo;
   SearchData search_data;
+  GtkCellRendererComboPrivate *priv;
 
   cell_text = GTK_CELL_RENDERER_TEXT (cell);
   if (cell_text->editable == FALSE)
     return NULL;
 
   cell_combo = GTK_CELL_RENDERER_COMBO (cell);
-  if (cell_combo->model == NULL || cell_combo->text_column < 0)
+  if (cell_combo->text_column < 0)
     return NULL;
 
+  priv = GTK_CELL_RENDERER_COMBO_GET_PRIVATE (cell_combo);
+
   if (cell_combo->has_entry) 
     {
-      combo = gtk_combo_box_entry_new_with_model (cell_combo->model, cell_combo->text_column);
+      combo = gtk_combo_box_entry_new ();
+
+      if (cell_combo->model)
+        gtk_combo_box_set_model (GTK_COMBO_BOX (combo), cell_combo->model);
+      gtk_combo_box_entry_set_text_column (GTK_COMBO_BOX_ENTRY (combo),
+                                           cell_combo->text_column);
 
       if (cell_text->text)
 	gtk_entry_set_text (GTK_ENTRY (GTK_BIN (combo)->child), 
@@ -417,19 +457,26 @@ gtk_cell_renderer_combo_start_editing (GtkCellRenderer     *cell,
   else
     {
       cell = gtk_cell_renderer_text_new ();
-      combo = gtk_combo_box_new_with_model (cell_combo->model);
+
+      combo = gtk_combo_box_new ();
+      if (cell_combo->model)
+        gtk_combo_box_set_model (GTK_COMBO_BOX (combo), cell_combo->model);
+
       gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), cell, TRUE);
       gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), 
 				      cell, "text", cell_combo->text_column, 
 				      NULL);
 
       /* determine the current value */
-      search_data.cell = cell_combo;
-      search_data.found = FALSE;
-      gtk_tree_model_foreach (cell_combo->model, find_text, &search_data);
-      if (search_data.found)
-	gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo),
-				       &(search_data.iter));
+      if (cell_combo->model)
+        {
+          search_data.cell = cell_combo;
+          search_data.found = FALSE;
+          gtk_tree_model_foreach (cell_combo->model, find_text, &search_data);
+          if (search_data.found)
+            gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo),
+                                           &(search_data.iter));
+        }
     }
 
   g_object_set (combo, "has-frame", FALSE, NULL);
@@ -450,6 +497,8 @@ gtk_cell_renderer_combo_start_editing (GtkCellRenderer     *cell,
 		      G_CALLBACK (gtk_cell_renderer_combo_focus_out_event),
 		      cell_combo);
 
+  priv->combo = combo;
+
   return GTK_CELL_EDITABLE (combo);
 }