Single<FilePreviewCmd>().StartInit();

void
FilePreviewCmd::StartInit()
{
	//CheckOfficePlugins(false);//sync
	thread_.Run(THISBACK1(CheckOfficePlugins, true));//acync
}
	
void 
FilePreviewCmd::CheckOfficePlugins(bool preinit)
{
	isXlsOpen = sheet.IsAvailable("Open");
	isXlsMS = sheet.IsAvailable("Microsoft");
	if (!isXlsMS)
		isXlsOpen = sheet.IsAvailable("Open");
	
	isDocMS = doc.IsAvailable("Microsoft");
	if (!isDocMS)
		isDocOpen = doc.IsAvailable("Open");

	if (preinit)
		PostCallback(THISBACK(InitOfficePlugins));
	else 
		InitOfficePlugins();
}
	
void 
FilePreviewCmd::InitOfficePlugins()
{
 	if (isXlsMS) {
		sheet.Init("Microsoft");
	} else if (isXlsOpen)  {
		sheet.Init("Open");
	} 
	
	if (isDocMS) {
		doc.Init("Microsoft");
	} else if (isDocOpen) {
		doc.Init("Open");
	} 
	 		
	TopWindow::Open();
}