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Method for smooth scrolling of text using window

  • US 5,877,761 A
  • Filed: 07/12/1996
  • Issued: 03/02/1999
  • Est. Priority Date: 07/12/1996
  • Status: Expired due to Fees
First Claim
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1. A method for a user to scroll a text image containing alphanumeric characters that are generated by a computer system from a text-based file, said computer system containing means for scrolling said text image at a granularity defined by said alphanumeric characters, said method comprising the steps of:

  • generating a first window having a client area and displayed at a location on a computer monitor;

    generating a second window having a client area that is larger than said client area of said first window;

    positioning said client area of said second window such that said client area of said first window is positioned completely within said client area of said second window;

    said second window being blocked from displaying on said computer monitor except for a portion of its client area which overlaps said client area of said first window;

    drawing a first text image from said text-based file on said client area of said second window;

    moving said second window from a starting location in a direction desired by said user, thereby displaying different portions of said text image on said computer monitor during moving;

    returning said second window to said starting location when said text image has been moved in said moving step a distance corresponding to said granularity; and

    drawing a second text image from said text-based file on said client area of said second window such that said first and said second images differ by said granularity.

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