New property: canRemoveImmediateMessageFromQueue determines whether i…

…mmediate messages in the queue get removed, when a new immediate message gets posted

MTStatusBarOverlay.h

@@ -87,7 +87,7 @@ typedef enum MTMessageType {
 	// for displaying activity indication
 	UIActivityIndicatorView *activityIndicator_;
 	UILabel *finishedLabel_;
-
+	// if set to YES, neither activityIndicator nor finishedLabel are shown
 	BOOL hidesActivity_;
 
 	// Image of gray Status Bar
@@ -108,6 +108,8 @@ typedef enum MTMessageType {
 
 	// Queue stuff
 	NSMutableArray *messageQueue_;
+	// if YES older immediate messages in the queue get removed, when a new one gets posted
+	BOOL canRemoveImmediateMessagesFromQueue_;
 
 	// Detail View
 	MTDetailViewMode detailViewMode_;
@@ -146,6 +148,8 @@ typedef enum MTMessageType {
 @property (nonatomic, retain, readonly) NSMutableArray *messageHistory;
 // DEPRECATED: enable/disable history-tracking of messages
 @property (nonatomic, assign, getter=isHistoryEnabled) BOOL historyEnabled;
+// determines if immediate messages in the queue get removed or stay in the queue, when a new immediate message gets posted
+@property (nonatomic, assign) BOOL canRemoveImmediateMessagesFromQueue;
 // the mode of the detailView
 @property (nonatomic, assign) MTDetailViewMode detailViewMode;
 // the text displayed in the detailView (alternative to history)

MTStatusBarOverlay.m

@@ -337,6 +337,7 @@ @implementation MTStatusBarOverlay
 @synthesize hideInProgress = hideInProgress_;
 @synthesize active = active_;
 @synthesize messageQueue = messageQueue_;
+@synthesize canRemoveImmediateMessagesFromQueue = canRemoveImmediateMessagesFromQueue_;
 @synthesize detailViewMode = detailViewMode_;
 @synthesize detailText = detailText_;
 @synthesize detailTextView = detailTextView_;
@@ -472,6 +473,7 @@ - (id)initWithFrame:(CGRect)frame {
 		hiddenStatusLabel_ = statusLabel2_;
 
 		messageQueue_ = [[NSMutableArray alloc] init];
+		canRemoveImmediateMessagesFromQueue_ = YES;
 
         [self addSubview:backgroundView_];
 
@@ -580,7 +582,8 @@ - (void)postImmediateMessage:(NSString *)message type:(MTMessageType)messageType
 		NSMutableArray *clearedMessages = [NSMutableArray array];
 
 		for (id messageDictionary in self.messageQueue) {
-			if ([[messageDictionary valueForKey:kMTStatusBarOverlayImmediateKey] boolValue] == NO) {
+			if (messageDictionary != [self.messageQueue lastObject] &&
+				(self.canRemoveImmediateMessagesFromQueue || [[messageDictionary valueForKey:kMTStatusBarOverlayImmediateKey] boolValue] == NO)) {
 				[clearedMessages addObject:messageDictionary];
 			}
 		}
@@ -654,7 +657,7 @@ - (void)showNextMessage {
 	[self setStatusBarBackgroundForStyle:statusBarStyle];
 	[self setColorSchemeForStatusBarStyle:statusBarStyle];
 	[self updateUIForMessageType:messageType duration:duration];
-
+	
 	// if status bar is currently hidden, show it
 	if (self.reallyHidden) {
 		// set text of visible status label