WIP: critical bug EXT-4837 ([NUX] When filter results in null state, provide a message suggesting the user try global search.)

Partial implementation of help text in case of empty list when filtered for Nearby and Recent lists of People panel:
 * Extracted support implementation of several messages for empty list depend of filtering from LLGroupList to LLFlatListEx
 * change inheritence of LLGroupList and LLAvatarList from LLFlatListView to LLFlatListViewEx
 * updated panel people to init Nearby & Recent lists with appropriate messages.

--HG--
branch : product-engine

1 files changed, 36 insertions, 2 deletions

diff --git a/indra/llui/llflatlistview.cpp b/indra/llui/llflatlistview.cpp
index 82f054c4b7..990bf5cd22 100644
--- a/indra/llui/llflatlistview.cpp
+++ b/indra/llui/llflatlistview.cpp
@@ -1,10 +1,10 @@
 /** 
  * @file llflatlistview.cpp
- * @brief LLFlatListView base class
+ * @brief LLFlatListView base class and extension to support messages for several cases of an empty list.
  *
  * $LicenseInfo:firstyear=2009&license=viewergpl$
  * 
- * Copyright (c) 2009, Linden Research, Inc.
+ * Copyright (c) 2009-2010, Linden Research, Inc.
  * 
  * Second Life Viewer Source Code
  * The source code in this file ("Source Code") is provided by Linden Lab
@@ -1122,4 +1122,38 @@ void LLFlatListView::detachItems(std::vector<LLPanel*>& detached_items)
 	}
 }
 
+
+/************************************************************************/
+/*             LLFlatListViewEx implementation                          */
+/************************************************************************/
+LLFlatListViewEx::Params::Params()
+: no_items_msg("no_items_msg")
+, no_filtered_items_msg("no_filtered_items_msg")
+{
+
+}
+
+LLFlatListViewEx::LLFlatListViewEx(const Params& p)
+:	LLFlatListView(p)
+, mNoFilteredItemsMsg(p.no_filtered_items_msg)
+, mNoItemsMsg(p.no_items_msg)
+{
+
+}
+
+void LLFlatListViewEx::updateNoItemsMessage(bool items_filtered)
+{
+	if (items_filtered)
+	{
+		// items were filtered
+		setNoItemsCommentText(mNoFilteredItemsMsg);
+	}
+	else
+	{
+		// list does not contain any items at all
+		setNoItemsCommentText(mNoItemsMsg);
+	}
+
+}
+
 //EOF