Method for selecting objects on a computer display

• US 5,523,775 A
• Filed: 06/08/1994
• Issued: 06/04/1996
• Est. Priority Date: 05/26/1992
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Computer Incorporated (Apple Inc.)
• Inventors: Capps, Stephen P.
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): Lao, Lun-Yi
• Application Number:
  US08/225,579
• Time in Patent Office: 727 Days
• Field of Search: 345/112, 345/156, 345/157, 345/163, 345/168, 345/121, 345/116, 345/173, 345/179, 345/180, 345/182, 17/18, 17/19, 395/143
• US Class Current: 345/179
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06F 40/166 Editing, e.g. inserting or deleting
• CPC Class Codes: G06V 30/347 Sampling; Contour coding; Stroke extraction

Abstract

A method for selecting objects displayed on a screen of a pen-based computer system characterized by the steps of: (a) determining that a selection gesture has been made on the screen of the pen-based computer by a stylus; (b) detecting a path made by the stylus across at least a portion of an object depicted on the screen; (c) displaying a line image on the screen along the path; (d) determining a selection of at least a portion of the object as indicated by the path; and (e) displaying selection indicia on the screen representing the selection. The step of displaying the selection indicia can occur concurrently with or after the complete path is made by the stylus on the object. Preferably, the line image is removed after the step of displaying the selection indicia.

Claims

1. A method of selecting one or more items on a display screen of a stylus-based computer system, the computer system providing bounding boxes surrounding the items displayed on the display screen, the computer system also providing a normal nib of activated pixels at a location where the stylus contacts the display screen, the computer system also providing a normal ink image of a path traversed by the stylus on the display screen, the width of the normal ink image corresponding to the size of the normal nib, the method comprising the following steps:

(a) automatically generating a highlight nib having a larger size than the normal nib when the stylus is held stationary on the display screen for a predetermined time period, the highlight nib capable of producing a highlight ink image which is wider than the normal ink image, the width of the highlight ink image corresponding to the size of the highlight nib;

(b) determining a highlight path traversed by the stylus on the display screen and defined by the highlight nib, the highlight path defining a highlight stroke with a surrounding bounding box;

(c) displaying the highlight stroke in a highlight ink image which has a greater width than the normal ink image;

(d) selecting one or more of the items displayed on the screen based upon, at least in part, the identity of those items which have had their bounding boxes intersected by the bounding box of the highlight stroke; and

(e) highlighting the items selected on the display screen.

2. The method of claim 1 further comprising a step of producing an audible signal confirming that a highlight nib has been formed.

3. The method of claim 2 wherein the audible signal is a beep.

4. The method of claim 1 wherein the step of generating a highlight nib occurs when the stylus is held stationary for at least about 0.25 seconds.

5. The method claim 1 further comprising a step of removing the displayed highlight ink when the items selected on the display screen are highlighted in step e.

6. The method of claim 1 wherein the step of selecting one or more items involves selecting displayed items from the group consisting of text objects, graphical objects, and combinations thereof.

7. The method of claim 1 wherein the step of selecting one or more items involves selecting a single object which has had its bounding box intersected by the bounding box of the stroke.

8. The method of claim 1 wherein the step of selecting one or more items involves selecting one or more lines of text when the stroke is drawn perpendicular to and through the selected lines of text.

9. The method of claim 1 wherein the step of selecting one or more items involves selecting those items which have been surrounded by a substantially circular stroke.

10. The method of claim 1 wherein the step of selecting one or more items involves selecting those items whose bounding boxes are substantially overlapped by the bounding box of a substantially circular stroke.

11. The method of claim 1 wherein the step of selecting one or more items involves selecting a portion of an item when the bounding box of a substantially circular stroke does not substantially overlap the bounding box of the item, but does overlap the bounding box of the portion of the item.

12. The method of claim 1 wherein the step of generating a highlight nib generates a nib having a number of activated pixels that is greater than a number of activated pixels associated with the normal nib.

13. A stylus-based computer system comprising:

a cpu;

a memory;

a display screen sensitive to the position of a stylus and communicating with the cpu such that a normal nib of activated pixels is displayed at a location where the stylus contacts the display screen, the normal nib having a normal width, and a highlight nib having a larger number of activated pixels than the normal nib is automatically displayed when the stylus is held stationary on the display screen for a predetermined period, the highlight nib having a highlight width which is wider than the normal width, wherein when the highlight nib is displayed, any items displayed on the display screen which are contacted by the highlight nib are selected.

14. The stylus-based computer of claim 13 further comprising means for generating an audible signal when a highlight nib has been formed.

15. The stylus-based computer of claims 13 further comprising means for generating bounding boxes surrounding items displayed on the display screen, wherein when a bounding box is contacted by the highlight nib, an item surrounded by said bounding box is selected.