using bound's height / 2 to orient caption

Author: mcchang

OpenFlow/AFOpenFlowConstants.h

@@ -40,4 +40,4 @@
 #define CAPTION_WIDTH 200
 #define CAPTION_HEIGHT 50
 #define CAPTION_FONTSIZE 20
-#define CAPTION_OFFSET 10
+#define CAPTION_OFFSET 20

OpenFlow/AFOpenFlowView.m

@@ -259,7 +259,7 @@ - (void)layoutSubviews
     }
 
     CGFloat horizOrigin = contentOffset.x + halfScreenWidth - CAPTION_WIDTH / 2;
-    CGFloat vertOrigin = selectedCoverView.frame.origin.y + selectedCoverView.frame.size.width + CAPTION_OFFSET;
+    CGFloat vertOrigin = selectedCoverView.frame.origin.y + selectedCoverView.frame.size.height / 2.0 + CAPTION_OFFSET;
     selectedCoverCaption.frame = CGRectMake(horizOrigin, vertOrigin, CAPTION_WIDTH, CAPTION_HEIGHT);
     selectedCoverCaption.text = [NSString stringWithFormat:@"%@", [coverImageCaptions objectForKey:[NSNumber numberWithInt:targetCover]]];
     // put it on top
@@ -570,4 +570,4 @@ - (void)setSelectedCover:(int)newSelectedCover {
     [self notifyCoverSelection];
 }
 
-@end
+@end