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Method and system for zooming in and out of paginated content

  • US 7,434,174 B2
  • Filed: 03/04/2005
  • Issued: 10/07/2008
  • Est. Priority Date: 03/04/2005
  • Status: Active Grant
First Claim
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1. A computer-readable storage medium having computer-executable instructions for performing a method for changing the zoom of a document displayed in a viewing area, the method comprising:

  • receiving a zoom change for a document displayed in the viewing area;

    determining whether the zoom change is a zoom out or a zoom in;

    determining a focal point for the document;

    when the zoom change is a zoom in, determining if the focal point is at the center of the viewing area;

    when the zoom change is a zoom in and the focal point is at the center of the viewing area, keeping the focal point at the center of the viewing area;

    when the zoom change is a zoom in and the focal point is not at the center of the viewing area, calculating a new position for the focal point; and

    displaying a viewable area of the document based on the focal point and the zoom change.

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