[gtk+] Improve PICKONE_* handling in GtkPrinterOptionWidget (bug #543520)

[Benjamin Berg <bberg src gnome org>]

commit b3e352f48967db85efd5dc7fd167184263f63340
Author: Benjamin Berg <benjamin sipsolutions net>
Date:   Wed Dec 28 01:02:28 2011 +0100

    Improve PICKONE_* handling in GtkPrinterOptionWidget (bug #543520)
    
    This patch modifies GtkPrinterOptionWidget to support loading them
    again. It also allows the user to enter values from the dropdown list
    to select the item.

 gtk/gtkprinteroptionwidget.c |   88 +++++++++++++++++++++++++++++++++--------
 1 files changed, 71 insertions(+), 17 deletions(-)
---
diff --git a/gtk/gtkprinteroptionwidget.c b/gtk/gtkprinteroptionwidget.c
index d3ef046..124b593 100644
--- a/gtk/gtkprinteroptionwidget.c
+++ b/gtk/gtkprinteroptionwidget.c
@@ -366,8 +366,8 @@ combo_box_set (GtkWidget   *combo,
   gtk_tree_model_foreach (model, set_cb, &set_data);
 }
 
-static char *
-combo_box_get (GtkWidget *combo)
+static gchar *
+combo_box_get (GtkWidget *combo, gboolean *custom)
 {
   GtkTreeModel *model;
   gchar *value;
@@ -377,7 +377,41 @@ combo_box_get (GtkWidget *combo)
 
   value = NULL;
   if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo), &iter))
-     gtk_tree_model_get (model, &iter, VALUE_COLUMN, &value, -1);
+    {
+      gtk_tree_model_get (model, &iter, VALUE_COLUMN, &value, -1);
+      *custom = FALSE;
+    }
+  else
+    {
+      if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (combo)))
+        {
+          value = g_strdup (gtk_entry_get_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (combo)))));
+          *custom = TRUE;
+        }
+
+      if (!value || !gtk_tree_model_get_iter_first (model, &iter))
+        return value;
+
+      /* If the user entered an item from the dropdown list manually, return
+       * the non-custom option instead. */
+      do
+        {
+          gchar *val, *name;
+          gtk_tree_model_get (model, &iter, VALUE_COLUMN, &val,
+                                            NAME_COLUMN, &name, -1);
+          if (g_str_equal (value, name))
+            {
+              *custom = FALSE;
+              g_free (name);
+              g_free (value);
+              return val;
+            }
+
+          g_free (val);
+          g_free (name);
+        }
+      while (gtk_tree_model_iter_next (model, &iter));
+    }
 
   return value;
 }
@@ -558,25 +592,29 @@ combo_changed_cb (GtkWidget              *combo,
   gchar *value;
   gchar *filtered_val = NULL;
   gboolean changed;
+  gboolean custom = TRUE;
 
   g_signal_handler_block (priv->source, priv->source_changed_handler);
   
-  value = combo_box_get (combo);
+  value = combo_box_get (combo, &custom);
 
-  /* handle some constraints */
-  switch (priv->source->type)
+  /* Handle constraints if the user entered a custom value. */
+  if (custom)
     {
-    case GTK_PRINTER_OPTION_TYPE_PICKONE_PASSCODE:
-      filtered_val = filter_numeric (value, FALSE, FALSE, &changed);
-      break;   
-    case GTK_PRINTER_OPTION_TYPE_PICKONE_INT:
-      filtered_val = filter_numeric (value, TRUE, FALSE, &changed);
-      break;
-    case GTK_PRINTER_OPTION_TYPE_PICKONE_REAL:
-      filtered_val = filter_numeric (value, TRUE, TRUE, &changed);
-      break;
-    default:
-      break;
+      switch (priv->source->type)
+        {
+        case GTK_PRINTER_OPTION_TYPE_PICKONE_PASSCODE:
+          filtered_val = filter_numeric (value, FALSE, FALSE, &changed);
+          break;
+        case GTK_PRINTER_OPTION_TYPE_PICKONE_INT:
+          filtered_val = filter_numeric (value, TRUE, FALSE, &changed);
+          break;
+        case GTK_PRINTER_OPTION_TYPE_PICKONE_REAL:
+          filtered_val = filter_numeric (value, TRUE, TRUE, &changed);
+          break;
+        default:
+          break;
+        }
     }
 
   if (filtered_val)
@@ -873,6 +911,22 @@ update_widgets (GtkPrinterOptionWidget *widget)
     case GTK_PRINTER_OPTION_TYPE_STRING:
       gtk_entry_set_text (GTK_ENTRY (priv->entry), source->value);
       break;
+    case GTK_PRINTER_OPTION_TYPE_PICKONE_PASSWORD:
+    case GTK_PRINTER_OPTION_TYPE_PICKONE_PASSCODE:
+    case GTK_PRINTER_OPTION_TYPE_PICKONE_REAL:
+    case GTK_PRINTER_OPTION_TYPE_PICKONE_INT:
+    case GTK_PRINTER_OPTION_TYPE_PICKONE_STRING:
+      {
+        GtkEntry *entry;
+
+        entry = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (priv->combo)));
+        if (gtk_printer_option_has_choice (source, source->value))
+          combo_box_set (priv->combo, source->value);
+        else
+          gtk_entry_set_text (entry, source->value);
+
+        break;
+      }
     case GTK_PRINTER_OPTION_TYPE_FILESAVE:
       {
         gchar *filename = g_filename_from_uri (source->value, NULL, NULL);