MacGui: Read events from the mouse scroll wheel in HBPreviewController.m to change the preview image.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5690 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 17 insertions, 0 deletions

diff --git a/macosx/HBPreviewController.m b/macosx/HBPreviewController.m
index 5d132a12e..8ea8c9bb3 100644
--- a/macosx/HBPreviewController.m
+++ b/macosx/HBPreviewController.m
@@ -1278,6 +1278,23 @@
         [super keyDown:event];
 }
 
+- (void)scrollWheel:(NSEvent *)theEvent
+{
+    if (!fEncodeState)
+    {
+        if ([theEvent deltaY] < 0)
+        {
+            [fPictureSlider setIntegerValue:fPicture < [fPictureSlider maxValue] ? fPicture + 1 : fPicture];
+            [self pictureSliderChanged:self];
+        }
+        else if ([theEvent deltaY] > 0)
+        {
+            [fPictureSlider setIntegerValue:fPicture > [fPictureSlider minValue] ? fPicture - 1 : fPicture];
+            [self pictureSliderChanged:self];
+        }
+    }
+}
+
 #pragma mark *** QTTime Utilities ***
 
 	// convert a time value (long) to a QTTime structure