CN112286407A

CN112286407A - Domain cursor

Info

Publication number: CN112286407A
Application number: CN201910632183.1A
Authority: CN
Inventors: 刘传义
Original assignee: Lanzhou University
Current assignee: Lanzhou University
Priority date: 2019-07-13
Filing date: 2019-07-13
Publication date: 2021-01-29

Abstract

The invention discloses a domain cursor, relates to a graphical user interface, and particularly relates to a method for continuously selecting a single target object and a plurality of target objects on a multi-point touch screen and solving the problems that an operator shields screen contents and the pointing accuracy of a touch interaction mode is low. The field cursor is always positioned between the contact points of two fingers on the screen, is a semitransparent rectangle and can translate and rotate on the screen along with the fingers. When the distance between the contact points of the two fingers on the screen is smaller than or equal to the width of the cursor, the cursor is changed into a circular field cursor operated by a single finger. The field cursor with two shapes adopts a 'scratch' type operation method to unify the selection or the de-selection of a single object and a plurality of objects into an operation mode. The method and the device are used for selecting the target object on the touch screen.

Description

Domain cursor

Technical Field

The invention relates to a graphical user interface, in particular to a method for continuously operating the selection of a single target object and a plurality of target objects on a multi-point touch screen and solving the problems of screen content occlusion by an operator, low pointing accuracy of a direct-touch operation mode and the like.

Background

Currently, various touch screen devices ranging from small to smart phones and tablet computers to large wall bodies are widely applied to aspects of people in learning, working and living. On the touch screen, the operation mode of selecting the object is direct touch. The operation mode has the advantages of simplicity, nature and intuition, but has some defects in the use process, such as: the operation of single target object selection and multi-target object selection is discontinuous, the operation efficiency of multi-target object selection is low, the content of a screen is easily shielded by an operator, the pointing accuracy of the operator when the operator selects a target object, particularly a small target object, is low, and the like.

In order to improve pointing accuracy for small target objects and reduce operational difficulty, the literature (KABBASH P, BUXTON W A S. the "priority" technique: fits' law and selection using area cursors [ C ]// Proceedings of the SIGCAI conference on Human factors in computing systems. New York, NY, USA: ACM Press/Addison-Wesley Publishing Co.,1995:273-279.) proposes to change the cursor from a traditional one point to a rectangle with a certain width and height, which the author refers to as "area cursors". The shape and the size of the field cursor are kept unchanged all the time in the use process, so that the field cursor is not flexible enough in the use process and cannot be completely adapted to the changeable interface environment in the actual use process; in addition, the field cursor is an opaque rectangle, and the problem that screen content is shielded by an operator or the field cursor cannot be solved when the field cursor is used on a touch screen.

Disclosure of Invention

In view of the above problems existing in the touch screen, the present invention provides a different domain cursor, which allows a user to dynamically adjust the length, position, posture, and other attributes of the user through two fingers during the use process. Preferably, the field cursor is set to be rectangular. Specifically, the cursor (1) is always positioned between two contacts of two fingers on the touch screen; (2) two end points of the central line of the device coincide with two contact points of two fingers on the screen; (3) the length of the touch screen can be dynamically adjusted by changing the touch points on the screen by two fingers; (4) the position of the finger on the screen is changed along with the movement of the two fingers on the screen; (5) its pose on the screen changes as the two fingers rotate on the screen.

The target object is selected in the screen area between the two fingers, and further the regional cursor is set to be semi-transparent, so the domain cursor solves the problem that the content of the screen is shielded by an operator or the domain cursor.

In a special case, when the distance between the contact points of the two fingers on the screen is smaller than or equal to the set threshold, the shape of the cursor is changed into a circle, and at this time, when any one finger is lifted, the cursor is a circle area with the contact point of the other finger on the screen as the center.

The rectangular field cursor is selected as a 'wiping' mode: when the cursor is "wiped" over the target object, the target object is preferably selected when the ratio of the area of the "wiped" portion of the target object to its total area exceeds a certain threshold.

The circular field cursor is selected by a special "swipe" mode, i.e., the movement trajectory of the circular cursor "crosses" the target object, which is selected. This particular "rub-through" selection is referred to as a "thread-through" selection.

When the cursor with the two shapes is used for selecting the target, the cursor is judged in an 'on-off' type: if the "rubbed" object had its previous state unselected, then the object will be selected; otherwise, if its previous state is selected, the selected state of the object will be cancelled.

In the case of selecting or deselecting an operation object, the cursor of the above two shapes may be operated for a single object or may be operated for a plurality of objects continuously. That is, the number of the objects which are "wiped over" is single, namely, the selection or the deselection of the single target object; the number of the objects which are wiped by the cleaner is multiple, namely, the selection or the deselection of the multi-target object is carried out.

In the single-target object and multi-target object selection experiment, the experimental data show that the domain cursor operation time is reduced by 49.1% on average and the operation error rate is reduced by 72.1% on average compared with the operation mode of direct touch. For simple multi-target object selection, the experimental result shows that the average value of the domain cursor operation time and the average value of the operation error rate are respectively reduced by 57% and 75.5% compared with the operation mode of direct touch.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present invention (on a multi-touch screen combo);

FIG. 2 is a schematic diagram of a second embodiment of the present invention (on an independent multi-touch screen);

FIG. 3 is a schematic view of the rotation and translation of a domain cursor;

FIG. 4 is a schematic diagram illustrating length adjustment of a field cursor;

FIG. 5 is a schematic diagram of a cursor switching to a circular field;

FIG. 6 is a schematic view of a "line through" selection of a circular field cursor;

FIG. 7 is a flow chart of an embodiment of the present invention.

Detailed Description

Referring to fig. 1, in a multi-touch screen integrated machine (1), a touch screen needs to be able to detect two or more touch points in a typical embodiment of the present invention. Preferably, the cursor (2) is rectangular, and the length of the rectangle is the length of a line between the contact points of two fingers on the screen; preferably, the width of the rectangle is adaptively set to 2/3 the width of the system small icon according to the system resolution. The cursor is drawn by taking a line segment between two finger contact points as a long central axis all the time. Preferably, the ratio r of the area of the target object (3) to its total area when the cursor "rubs" over it>r₀When the object is selected, wherein

Pi in the formula is the circumferential ratio. The setting is to balance and optimize the efficiency of selecting the target and reduce the misselection of the object. 4 in FIG. 1 are non-target objects.

Fig. 2 is a schematic diagram of another embodiment of the present invention, in which fig. 1 is a computer host, and fig. 2, 3, 4 and 5 are a multi-touch screen, a domain cursor, a target object and a non-target object, respectively. This embodiment is identical to the above embodiment ([0013]) except that the host and the multi-touch screen are separated.

When two fingers of a user translate or (or simultaneously) rotate on the screen, the domain cursor takes the fixed width and the length of a line segment between the two finger touch points as the length, and takes the line segment between the two finger touch points as a central axis along the long edge direction to be drawn on the screen in real time; the cursor thus translates or (or simultaneously) rotates on the screen as the two fingers move. See fig. 3, the cursor moves from position 1 to position 2 as the finger translates and rotates on the screen, while its pose changes from 1 to 2.

The cursor is drawn on the screen in real time according to the fixed width and length thereof (length of the line segment between the two finger touch points) as described above ([0013]) and with the line segment between the two finger touch points as a central axis in the long side direction as a function of the distance between the touch points of the two fingers on the screen. For example, as seen in FIG. 4, the cursor changes from length 1 to length 2 in real time and continuously as the two fingers stroke in toward each other, during which the cursor is redrawn in real time as the fingers stroke across the screen, so the user sees a continuous change in the length of the cursor.

When the distance between the two finger contacts is reduced to be within the fixed width value of the cursor (including the width value thereof), the shape of the cursor is changed from the rectangle to a circular area, the center of the circle is the middle point of the connecting line of the two finger contacts, and the diameter is a fixed value (being the fixed width value of the cursor of [0013]), as shown in 1 in fig. 5. At this time, the user lifts any one finger, the size of the circular cursor is unchanged, and the center of the circle is automatically moved to the contact point position of another finger on the screen, which is kept in contact with the screen, namely, the circular cursor becomes a single-finger circular field cursor (2 in fig. 5). The single-finger circular field cursor is also set to be semi-transparent, and only a single finger is used in the operation process, so that the problem that the screen content of an operation area is blocked by an operation hand does not exist in the operation process. The single-finger circular field cursor is more suitable for a complex interface with dense object arrangement and discontinuous target object arrangement.

The method for selecting a target object with a single-finger circular field cursor is shown in fig. 6, where 1 is a touch screen, 2 is a single-finger circular cursor, 3 is a selected target object, 4 is an unselected object, and 5 is a trace line drawn by the circular cursor on the screen (which indicates that the line is not drawn in practical use). The method and criteria for selecting an object with a single-finger circular cursor are the same as those described in the section [0013], and the user feels that the object "crossed" by the circular cursor trajectory is selected when using the method, so that the method is called "line-through" selection more vividly.

The complete implementation flow chart of the invention is shown in figure 7.

Claims

1. A field cursor, comprising: (1) the touch screen is always positioned between two contacts of two fingers on the touch screen; (2) two end points of the central line of the device coincide with two contact points of two fingers on the screen; (3) the length of the touch screen can be dynamically adjusted by changing the touch points on the screen by two fingers; (4) the position of the finger on the screen is changed along with the movement of the two fingers on the screen; (5) its pose on the screen changes as the two fingers rotate on the screen.

2. The field cursor of claim 1, wherein: the cursor is translucent.

3. The field cursor of claim 1, wherein: when the distance between the contact points of the two fingers on the screen is less than or equal to a set threshold value, the cursor shape changes to a circular shape.

4. The field cursor of claim 1, wherein: the target object is selected in a "swipe" manner.

5. The field cursor of claim 3, wherein: the target object which is stroked by the user is selected in a line-through mode.

6. The target object selection method according to claim 4 or 5, characterized in that: and canceling the selection of the selected target by the same operation method as the selected target.

7. The target object selection method according to claim 4 or 5, characterized in that: the selection of single objects and multiple objects is unified into one selection mode.

8. The method of claim 6, wherein: the deselection of single objects and multiple objects is unified into one mode of operation.