Method and apparatus for enlarging a trend graph
First Claim
1. A method for enlarging a portion of an overall trend graph to be displayed on a display screen, said display screen being subdivided into upper and lower reduced display sections and a middle enlarged display section, said middle enlarged display section displaying an enlarged portion of said overall trend graph, said method comprising the steps of:
- calculating a reduction ratio of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen for displaying said overall trend graph and an enlargement ratio of said middle enlarged display section;
setting, as a first virtual screen image, a first data representative of said overall trend graph which has been enlarged by said enlargement ratio;
setting second and third data representative of upper and lower portions of said overall trend graph, each of which has been reduced by said calculated reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections;
scrolling a display-position designating window within said first virtual screen image, said designating window indicating said enlarged portion, and simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; and
displaying said overall trend graph on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, wherein said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen.
1 Assignment
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Accused Products
Abstract
In an enlarged trend graph displaying method, a portion of an overall trend graph is enlarged so as to be displayed on a display screen subdivided into upper and lower reduced display sections and a middle enlarged display section. This enlarged trend graph displaying method comprises the steps of: calculating both a display area ratio of the middle enlarged display section to an overall display area of the screen for displaying the overall trend graph, and an enlargement ratio thereof, and also for calculating a reduction ratio of each of the upper and lower reduced display sections based upon the display area ratio and enlargement ratio of the middle enlarged display section; setting first data on the overall trend graph which has been enlarged by the enlargement ratio as a first virtual screen image indicative of the middle enlarged display section; setting second and third data on upper and lower portions of the overall trend graph which each has been reduced by the same reduction ratio as second and third virtual screen images representative of the upper and lower reduced display sections; scrolling a display position designating window for the first virtual screen image indicative of the middle enlarged display section, and simultaneously moving a viewport for the enlarged display section within the display screen in conjunction with the scrolling operation, whereby the overall trend graph is displayed on the display screen subdivided into the upper and lower reduced display sections and middle enlarged display section, and also the middle enlarged display section is moved within the display screen and displayed with having top priority with respect to displays for the upper and lower reduced display sections.
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Citations
13 Claims
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1. A method for enlarging a portion of an overall trend graph to be displayed on a display screen, said display screen being subdivided into upper and lower reduced display sections and a middle enlarged display section, said middle enlarged display section displaying an enlarged portion of said overall trend graph, said method comprising the steps of:
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calculating a reduction ratio of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen for displaying said overall trend graph and an enlargement ratio of said middle enlarged display section; setting, as a first virtual screen image, a first data representative of said overall trend graph which has been enlarged by said enlargement ratio; setting second and third data representative of upper and lower portions of said overall trend graph, each of which has been reduced by said calculated reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections; scrolling a display-position designating window within said first virtual screen image, said designating window indicating said enlarged portion, and simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; and displaying said overall trend graph on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, wherein said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen. - View Dependent Claims (2, 3, 4, 5, 6, 11)
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7. A trend graph displaying apparatus for displaying said trend graph with an enlarged portion on a display screen subdivided into upper and lower reduced display sections and a middle enlarged display section, comprising:
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calculation means for calculating a reduction ratio of each of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen and an enlargement ratio of said middle enlarged display section; storage means for storing a first data representative of said overall trend graph which has been enlarged by said enlargement ratio as a first virtual screen image, and for storing second and third data representative of upper and lower portions of said overall trend graph, each being reduced by said reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections, respectively; and scrolling means for scrolling a display-position designating window within said first virtual screen image to indicate a portion of said first virtual screen image to be displayed on said middle enlarged section as said enlarged portion and for simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; wherein said overall trend graph is displayed on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, and said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen. - View Dependent Claims (8, 9, 10, 12, 13)
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Specification