Message Synchronisation now supported by photoshare (photo and comments sync)

Photoshare UI now functional 
- subscribing to an album enables message sync
- TokenQueue now operate with FIFO stack to prevent overlap in request completion
- photos are now load on demand as with comments
- fixed some noddy bugs (subscribe flag initialises incorrectly)


git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5624 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/util/TokenQueueV2.cpp

@@ -104,7 +104,7 @@ void TokenQueueV2::queueRequest(uint32_t token, uint32_t basictype, uint32_t ans
 	gettimeofday(&req.mRequestTs, NULL);
 	req.mPollTs = req.mRequestTs;
 
-	mRequests.push_back(req);
+        mRequests.push_back(req);
 
 	if (mRequests.size() == 1)
 	{
@@ -123,26 +123,23 @@ void TokenQueueV2::doPoll(float dt)
 
 void TokenQueueV2::pollRequests()
 {
-	std::list<TokenRequestV2>::iterator it;
-
 	double pollPeriod = 1.0; // max poll period.
-	for(it = mRequests.begin(); it != mRequests.end();)
-	{
-		if (checkForRequest(it->mToken))
-		{
-			/* clean it up and handle */
-			loadRequest(*it);		
-			it = mRequests.erase(it);	
-		}
-		else
-		{
-			/* calculate desired poll period */
 
-			/* if less then current poll period, adjust */	
-			
-			it++;
-		}
-	}
+        TokenRequestV2 req;
+
+        if(mRequests.size() > 0){
+            req = mRequests.front();
+        }else
+        {
+            return;
+        }
+
+        if (checkForRequest(req.mToken))
+        {
+            /* clean it up and handle */
+            loadRequest(req);
+            mRequests.pop_front();
+        }
 
 	if (mRequests.size() > 0)
 	{
@@ -178,7 +175,7 @@ bool TokenQueueV2::cancelRequest(const uint32_t token)
 	/* cancel at lower level first */
 	mService->cancelRequest(token);
 
-	std::list<TokenRequestV2>::iterator it;
+        std::list<TokenRequestV2>::iterator it;
 
 	for(it = mRequests.begin(); it != mRequests.end(); it++)
 	{

retroshare-gui/src/util/TokenQueueV2.h

@@ -64,9 +64,8 @@ class TokenResponseV2
 
 
 /*!
- *
- *
- *
+ * An important thing to note is that all requests are stacked (so FIFO)
+ * This is to prevent overlapped loads on GXS UIs
  */
 class TokenQueueV2: public QWidget
 {
@@ -110,7 +109,7 @@ private slots:
 
 private:
 	/* Info for Data Requests */
-	std::list<TokenRequestV2> mRequests;
+        std::list<TokenRequestV2> mRequests;
 
 	RsTokenServiceV2 *mService;
         TokenResponseV2 *mResponder;