- Added a ChunkMap class responsible for allocating new chunks to be downloaded, according to

- a given chunk strategy
	- the availablility map of each source 
- Integrated this into ftFileCreator
- added gui menu in file transfer+right click to change the chunk strategy: streaming vs. random

Next step: 
	- loading/saving file downloading state and availability map
	- displaying chunk details in the selected transfer tab (e.g. list of currently worked chunks, and their current downloading completion)



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1863 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftcontroller.cc

@@ -842,6 +842,21 @@ bool 	ftController::setPeerState(ftTransferModule *tm, std::string id,
 }
 
 
+bool ftController::setChunkStrategy(const std::string& hash,FileChunksInfo::ChunkStrategy s)
+{
+	std::map<std::string,ftFileControl>::iterator mit;
+	mit=mDownloads.find(hash);
+	if (mit==mDownloads.end())
+	{
+#ifdef CONTROL_DEBUG
+		std::cerr<<"ftController::FileCancel file is not found in mDownloads"<<std::endl;
+#endif
+		return false;
+	}
+
+	mit->second.mCreator->setChunkStrategy(s) ;
+	return true ;
+}
 
 bool 	ftController::FileCancel(std::string hash)
 {