MacGui: use accessibilityValueDescription for the slider value description, and check if the method is available so it doesn't crash on 10.9-10.7.

1 files changed, 12 insertions, 1 deletions

diff --git a/macosx/HBVideoController.m b/macosx/HBVideoController.m
index eeb575ce1..355f24ad9 100644
--- a/macosx/HBVideoController.m
+++ b/macosx/HBVideoController.m
@@ -79,6 +79,7 @@ static void *HBVideoControllerContext = &HBVideoControllerContext;
         [self addObserver:self forKeyPath:@"video.encoder" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
         [self addObserver:self forKeyPath:@"video.frameRate" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
         [self addObserver:self forKeyPath:@"video.quality" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
+        [self addObserver:self forKeyPath:@"video.preset" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
         [self addObserver:self forKeyPath:@"video.unparseOptions" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
         [self addObserver:self forKeyPath:@"video.advancedOptions" options:NSKeyValueObservingOptionInitial context:HBVideoControllerContext];
     }
@@ -129,7 +130,17 @@ static void *HBVideoControllerContext = &HBVideoControllerContext;
         }
         else if ([keyPath isEqualToString:@"video.quality"])
         {
-            fVidQualitySlider.accessibilityValue = [NSString stringWithFormat:@"%@ %.2f", self.video.constantQualityLabel, self.video.quality];
+            if ([fVidQualitySlider respondsToSelector:@selector(setAccessibilityValueDescription:)])
+            {
+                fVidQualitySlider.accessibilityValueDescription = [NSString stringWithFormat:@"%@ %.2f", self.video.constantQualityLabel, self.video.quality];;
+            }
+        }
+        else if ([keyPath isEqualToString:@"video.preset"])
+        {
+            if ([fPresetsSlider respondsToSelector:@selector(setAccessibilityValueDescription:)])
+            {
+                fPresetsSlider.accessibilityValueDescription = self.video.preset;
+            }
         }
         else if ([keyPath isEqualToString:@"video.unparseOptions"])
         {