Documents in Preview scroll based on mouse focus

Oct 23, '07 07:30:03AM

Contributed by: johngoldfinger

I wanted to share an interesting behavior of Preview that I noticed the other day. If you use a mouse with a scrollwheel, the result of using the wheel will differ based on which window the mouse is hovering over.

Specifically, I have opened a PDF file with enough pages to create an active scroll bar in the drawer. If the drawer list has input focus (blue outline) and the mouse is over the drawer, then the scrollwheel will cause the page list scrollbar to scroll. However, if I mouse the mouse over the main document window, then using the scrollwheel will scroll which page of the document is being shown!

My impression is that it's rare for applications to change input behaviors just by moving the mouse to different areas of a window; usually the user must click the mouse to change focus, then the behavior changes.

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