Using a scroll wheel now changes the selection as appropriate

mattball · Mar 27, 2009 · 5b22847 · 5b22847
1 parent 9d5fc57
commit 5b22847
Showing 1 changed file with 19 additions and 0 deletions.
diff --git a/MBCoverFlowView.m b/MBCoverFlowView.m
@@ -46,6 +46,8 @@ of this software and associated documentation files (the "Software"), to deal
 const float MBCoverFlowScrollerHorizontalMargin = 80.0;
 const float MBCoverFlowScrollerVerticalSpacing = 16.0;
 
+const float MBCoverFlowScrollMinimumDeltaThreshold = 0.4;
+
 #define MBCoverFlowViewContainerMinY (NSMaxY([self.accessoryController.view frame]) - 3*[self itemSize].height/4)
 
 // Perspective parameters
@@ -276,6 +278,23 @@ - (void)mouseDown:(NSEvent *)theEvent
 	}
 }
 
+- (void)scrollWheel:(NSEvent *)theEvent
+{
+	if (fabs([theEvent deltaY]) > MBCoverFlowScrollMinimumDeltaThreshold) {
+		if ([theEvent deltaY] > 0) {
+			self.selectionIndex -= 1;
+		} else {
+			self.selectionIndex += 1;
+		}
+	} else if (fabs([theEvent deltaX]) > MBCoverFlowScrollMinimumDeltaThreshold) {
+		if ([theEvent deltaX] > 0) {
+			self.selectionIndex -= 1;
+		} else {
+			self.selectionIndex += 1;
+		}
+	}
+}
+
 #pragma mark NSView
 
 - (void)viewWillMoveToSuperview:(NSView *)newSuperview