From 8f630c29845198d1510b04d351a51573b7f489d1 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Thu, 27 Oct 2011 09:42:46 +0200
Subject: [PATCH] ComboGrid.js: allow to select empty value

---
 www/manager/form/ComboGrid.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/www/manager/form/ComboGrid.js b/www/manager/form/ComboGrid.js
index 3719a3f4..4ec48b16 100644
--- a/www/manager/form/ComboGrid.js
+++ b/www/manager/form/ComboGrid.js
@@ -13,6 +13,20 @@ Ext.define('PVE.form.ComboGrid', {
 	return (count > 10) ? 10*lh : 26+count*lh;
     },
 
+    // hack: allow to select empty value
+    // seems extjs does not allow that when 'editable == false'
+    onKeyUp: function(e, t) {
+        var me = this;
+        var key = e.getKey();
+
+        if (!me.editable && me.allowBlank && !me.multiSelect &&
+	    (key == e.BACKSPACE || key == e.DELETE)) {
+	    me.setValue('');
+	}
+
+        me.callParent(arguments);	
+    },
+
     // copied from ComboBox 
     createPicker: function() {
         var me = this,