CN110286827B - Element scaling control method, device, equipment and storage medium - Google Patents
Element scaling control method, device, equipment and storage medium Download PDFInfo
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- CN110286827B CN110286827B CN201910569489.7A CN201910569489A CN110286827B CN 110286827 B CN110286827 B CN 110286827B CN 201910569489 A CN201910569489 A CN 201910569489A CN 110286827 B CN110286827 B CN 110286827B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04806—Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
Abstract
The embodiment of the invention discloses an element scaling control method, an element scaling control device, element scaling control equipment and a storage medium, wherein the method comprises the following steps: receiving a first zooming event acted on the selected element at the current moment; determining a current zoom information group corresponding to the first zoom event; obtaining a previous zooming information group, wherein the previous zooming information group corresponds to a second zooming event acted on the selected element at the previous moment; determining a current target scaling value corresponding to the first scaling event according to the previous scaling information group and the current scaling information group; and controlling the selected element to be zoomed and displayed according to the current target zoom value. By the method, the change process of zooming can be controlled according to the moving speed of the user in zooming gesture movement, so that the zooming sensitivity during small-amplitude zooming can be better reduced, the zooming control effectiveness is improved, the zooming speed during large-amplitude zooming is improved, and repeated execution of zooming gestures of the user is reduced.
Description
Technical Field
The invention relates to the technical field of interactive intelligent panels, in particular to an element scaling control method, device, equipment and storage medium.
Background
The interactive intelligent tablet is one of more important applications in the interactive intelligent device, is widely applied to various application scenes, greatly improves the working and learning efficiency of people, and can zoom elements displayed on the interactive intelligent tablet by a user through touch in the practical application of the interactive intelligent tablet.
The operation process of scaling the element by the existing user can be described as follows: selecting any element needing zooming (all zooming default elements are zooming elements when no selection is made) on the interactive intelligent panel, dropping two or more touch points formed based on fingers on the area where the selected element is located, then moving the fingers to perform zooming-out or zooming-in operation on the element, and finally controlling the selected element to be displayed in a zoomed-out form by the interactive intelligent panel according to a zooming value returned by a finger zooming event.
In the process of implementing the invention, the inventor finds that the prior art has the following defects: the zooming is mainly controlled by the moving distance of the finger in the zooming process, the response to the zooming distance is too sensitive when the small-amplitude zooming is controlled, and the final zooming result easily exceeds the expected zooming amplitude; further alternatively, when controlling the large zoom, the user needs to perform the finger touch movement operation a plurality of times, which affects the zoom effect of the element.
Disclosure of Invention
In view of this, embodiments of the present invention provide an element scaling control method, apparatus, device and storage medium, so as to improve a scaling response effect of an element scaling operation on an interactive smart tablet.
In a first aspect, an embodiment of the present invention provides an element scaling control method, including:
receiving a first zooming event acted on the selected element at the current moment;
determining a current zoom information group corresponding to the first zoom event;
obtaining a last zooming information group, wherein the last zooming information group corresponds to a second zooming event acted on the selected element at the last moment;
determining a current target scaling value corresponding to the first scaling event according to the previous scaling information group and the current scaling information group;
and controlling the selected element to be zoomed and displayed according to the current target zoom value.
Further, the determining a current target scaling value corresponding to the first scaling event according to the previous scaling information group and the current scaling information group includes:
determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula;
taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement;
and determining the function value as a current target scaling value corresponding to the first scaling event.
Further, the current zoom information group includes: a current initial zoom value and a generation time of the current initial zoom value;
the last group of zoom information comprises: a last target scaling value and a time of determination of the last target scaling value;
the rate of change calculation formula is expressed as:
Further, after determining the current target scaling value corresponding to the first scaling event, the method further includes:
and updating and storing the current zooming information group based on the current target zooming value and the determined time of the current target zooming value.
Further, controlling the scaling and displaying of the selected element according to the current target scaling value comprises:
obtaining a last coordinate value corresponding to each key point in the selected element after the response of the second zooming event;
determining a current coordinate value corresponding to each key point under the first zooming event according to the current target zooming value and a previous coordinate value of each key point;
and controlling each key point in the selected element to be adjusted to the current coordinate value from the last coordinate value and displaying the zoomed selected element.
Further, the determining, according to the current target scaling value and a previous coordinate value of each of the keypoints, a current coordinate value corresponding to each of the keypoints under the first scaling event includes:
determining a first reference coordinate value corresponding to each previous coordinate value in a reference coordinate system, wherein the reference coordinate system is preset according to the attribute characteristics of the selected elements;
determining the product of the current target zoom value and each first reference coordinate value as a second reference coordinate value of each key point in the reference coordinate system;
and converting to obtain the current coordinate value of each key point in the screen coordinate system based on each second reference coordinate value.
Further, the selected elements include at least one of: handwriting, text, graphical shapes, multimedia, and tables.
In a second aspect, an embodiment of the present invention further provides an element scaling control apparatus, including:
the information receiving module is used for receiving a first zooming event acted on the selected element at the current moment;
a first determining module, configured to determine a current zoom information group corresponding to the first zoom event;
the information acquisition module is used for acquiring a previous zooming information group, and the previous zooming information group corresponds to a second zooming event acted on the selected element at the previous moment;
a second determining module, configured to determine, according to a previous scaling information group and the current scaling information group, a current target scaling value corresponding to the first scaling event;
and the zooming control module is used for controlling zooming and displaying of the selected element according to the current target zooming value.
Further, the second determining module is specifically configured to:
determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula;
taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement;
and determining the function value as a current target scaling value corresponding to the first scaling event.
Further, the current zoom information group includes: a current initial zoom value and a generation time of the current initial zoom value;
the last group of zoom information comprises: a last target scaling value and a time of determination of the last target scaling value;
the rate of change calculation formula is expressed as:
Further, the apparatus further comprises:
and the information updating module is used for updating and storing the current zooming information group based on the current target zooming value and the determined time of the current target zooming value after the current target zooming value corresponding to the first zooming event is determined.
Further, the zoom control module includes:
a first obtaining unit, configured to obtain a last coordinate value corresponding to each key point in the selected element after the response of the second scaling event;
a first determining unit, configured to determine, according to the current target scaling value and a previous coordinate value of each of the key points, a current coordinate value corresponding to each of the key points under the first scaling event;
and the adjusting control unit is used for controlling each key point in the selected element to be adjusted from the previous coordinate value to the current coordinate value and displaying the zoomed selected element.
Further, the first control unit is specifically configured to:
determining a first reference coordinate value corresponding to each previous coordinate value in a reference coordinate system, wherein the reference coordinate system is preset according to the attribute characteristics of the selected elements;
determining the product of the current target zoom value and each first reference coordinate value as a second reference coordinate value of each key point in the reference coordinate system;
and converting to obtain the current coordinate value of each key point in the screen coordinate system based on each second reference coordinate value.
Further, the selected elements include at least one of: handwriting, text, graphical shapes, multimedia, and tables.
In a third aspect, an embodiment of the present invention further provides an element scaling control apparatus, including:
a memory and one or more processors;
the memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement an element scaling control method provided in the first aspect of the embodiments of the present invention.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the element scaling control method according to the first aspect.
The above-mentioned element scaling control method, apparatus, device and storage medium provided, the control method includes: receiving a first zooming event acted on the selected element at the current moment, determining a current zooming information group corresponding to the first zooming event, acquiring a previous zooming information group, determining a current target zooming value of the first zooming event according to the previous zooming information and the current zooming information group, and finally controlling zooming and displaying of the selected element according to the current target zooming value. According to the technical scheme of the embodiment, the influence of the previous zooming event on the zooming value corresponding to the current zooming event can be realized in a series of zooming events generated by zooming operation of the user through the zooming gesture, so that the zooming value of the current zooming event is adjusted according to the influence, and the zooming position corresponding to the selected element under the current zooming event is determined through the redetermined current zooming value.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a flowchart of an element scaling control method according to an embodiment of the present invention;
fig. 2 is a flowchart of an element scaling control method according to a second embodiment of the present invention;
FIG. 3 is a diagram illustrating exemplary key points corresponding to selected elements in handwriting according to a second embodiment of the present invention;
FIG. 4 is a diagram showing an example of a reference coordinate system constructed when selected elements are handwriting in the second embodiment of the invention;
FIG. 5 is a diagram showing current coordinate system illustrations of key points in a reference coordinate system constructed when selected elements are handwriting in the second embodiment of the present invention;
fig. 6 is a block diagram of an element scaling control apparatus according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of an element scaling control device according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described are merely illustrative of the invention and are not limiting of the invention, and that embodiments and features of embodiments of the invention may be combined without conflict. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Example one
Fig. 1 is a flowchart of an element scaling control method according to an embodiment of the present invention. The embodiment is suitable for performing zoom control on a selected element in an interaction interface on an interactive smart tablet, where the element zoom control method provided by the embodiment may be executed by an element zoom control device, the element zoom control device may be implemented in a software and/or hardware manner, and the element zoom control device may be formed by two or more physical entities or may be formed by one physical entity. Generally, the element scaling control device may be a computer, a mobile phone, a tablet or an interactive smart tablet, etc.
For the convenience of understanding, the embodiment is exemplarily described with the interactive smart tablet as the element zoom control device. The interactive intelligent panel can be integrated equipment for controlling contents displayed on the display panel and realizing man-machine interaction operation through a touch technology, and integrates one or more functions of a projector, an electronic whiteboard, a curtain, a sound box, a television, a video conference terminal and the like. Generally speaking, the display screen of the interactive smart tablet can be a capacitive screen, a resistive screen, an infrared screen, an electromagnetic screen, or the like. The user can perform touch operation on the interactive intelligent tablet through a finger or a touch pen.
Furthermore, the interactive intelligent tablet is provided with application software carried by an operating system, and is also provided with application software downloaded from a third-party device or a server, wherein the specific type and content of the application software can be set according to actual conditions, and generally, for some application software with functions of writing, drawing, annotating, courseware making, displaying and playing, and the like, various elements (such as files, images, handwriting, geometric figures and the like) displayed in the display screen can be selected by a user and displayed in a zooming manner through a zooming gesture triggered by the user.
Exemplarily, referring to fig. 1, the element scaling control method provided in this embodiment specifically includes:
it should be noted that, the present embodiment may default that the user has selected an element to be zoomed in the currently presented interactive interface by a given selection method before performing the following steps, which is referred to as a selected element, and it may be known that the user may perform a zoom operation on the selected element by a touch movement of a finger in an area to which the selected element belongs, and it may be considered that the user performs a zoom operation from placing the finger on the touch screen to moving the finger away from the touch screen, where one zoom operation includes at least one finger movement, and each finger movement may generate a corresponding zoom event, and thus, one zoom operation performed on the zoom element by the user may be constituted by a set of zoom events.
S101, receiving a first zooming event acted on the selected element at the current moment.
In this embodiment, according to the above description of one zoom operation, it may be considered that the first zoom event received in this step is equivalent to a zoom event generated by the user when the user performs a zoom gesture movement on the region where the selected element is located, and is denoted as the first zoom event for convenience of distinguishing embodiments. It should be noted that the first zoom event specifically acts on the zoom element selected by the user or in the setting region where the zoom element is located, and for convenience of description, this embodiment is generally referred to as the zoom event acting on the selected element.
Further, the selected elements include at least one of: handwriting, text, graphical shapes, multimedia, and tables. It is understood that, in this embodiment, there is no specific limitation on the selected element, and the selected element may be any one or more elements shown in the currently displayed interface, for example, may be a piece of text, a piece of handwriting, one or more planar graphics or stereoscopic graphics, a video, a picture, a table, and the like. In addition, the elements displayed in the currently displayed interface are formed in such a way that one region component exists on the bottom-layer implementation, the region occupied by the region component can be marked as the region where the element is located in the present embodiment, and zooming of each selected element in the present embodiment can also be regarded as zooming of the region component to which each selected element belongs.
And S102, determining a current zooming information group corresponding to the first zooming event.
In this embodiment, the current zoom information set may specifically be understood as the zoom information fed back by default when the system responds to the first zoom event, and may include a zoom ratio initially corresponding to the first zoom event and a time for obtaining the zoom ratio. It can be understood that, in a touch mobile scaling mechanism existing in the interactive smart tablet, after monitoring that the first scaling event is generated, the system will default to feed back an initial scaling value (corresponding to an initial scaling ratio) corresponding to the first scaling event, and will simultaneously feed back a determination time (i.e. a response time) of the initial scaling value, and in this embodiment, information including the initial scaling value and the determination time corresponding to the initial scaling value is recorded as a current scaling information group.
S103, obtaining a previous zooming information group, wherein the previous zooming information group corresponds to a second zooming event acted on the selected element at the previous moment.
Based on the above description, the process of the user performing the zoom movement from the finger placed on the touch screen corresponds to one zoom operation, in this embodiment, for one zoom operation, one zoom movement of the finger of the user corresponds to one zoom event, a zoom event formed by the user performing the zoom movement at the current time corresponds to a first zoom event acting on the selected element at the current time, and meanwhile, the zoom event acting on the selected element at the previous time relative to the current time, that is, the zoom event formed by the user performing the zoom movement at the previous time is regarded as a second zoom event.
In this embodiment, the second scaling event also generates a scaling information group required for scaling at a previous time, which is denoted as a previous scaling information group in this embodiment, in this step, a previous scaling information group recorded after the scaling corresponding to the second scaling event is completed may be obtained, where the previous scaling information group at least includes a scaling ratio required for scaling in response to the second scaling event, and it should be noted that the scaling ratio included in the previous scaling information group may be considered as a previous target scaling value corresponding to the second scaling event, which is re-determined based on the method provided in this embodiment.
And S104, determining a current target scaling value corresponding to the first scaling event according to the previous scaling information group and the current scaling information group.
In this embodiment, in consideration of the existing element scaling implementation, for each scaling event, the scaling value directly returned by the scaling mechanism is always used to simply determine the corresponding position to be scaled of the element under each scaling event, and the association and influence between the scaling events in the scaling operation are not considered, thereby resulting in uncontrollable scaling sensitivity in the scaling operation. Therefore, in this step, the previous zoom information group corresponding to the second zoom event triggered at the previous time is combined with the current zoom information group corresponding to the first zoom event triggered at the current time, so as to re-determine the current target zoom value required by the first zoom event in response to zooming.
For example, this step may determine a variation rate of the zoom value corresponding to the zoom of the selected element when the finger of the user moves from the position of the previous time to the position of the current time according to the zoom value in the previous zoom information group and the determination time of the zoom value in the current zoom information group, where the variation rate of the zoom value may be determined according to a preset variation rate calculation formula, and this step may re-determine the current target zoom value required by the response of the current first zoom event according to the variation rate of the zoom value.
S105, controlling the selected element to be zoomed and displayed according to the current target zoom value.
In this embodiment, after determining the current target scaling value required for responding to the first scaling event based on the above steps, in this step, the target coordinate position where the selected element should be located after responding to the first scaling event may be obtained according to the coordinate position of the selected element at the previous time in combination with the current target scaling value, and then, in this step, the target coordinate position of the selected element scaling value may be controlled, and the scaled selected element may be displayed.
According to the element scaling control method provided by the embodiment of the invention, the influence of the previous scaling event on the scaling value corresponding to the current scaling event can be realized in a series of scaling events generated by the scaling operation of a user through a scaling gesture, so that the scaling value of the current scaling event is adjusted according to the influence, and the scaling position corresponding to the selected element under the current scaling event is determined through the redetermined current scaling value.
Example two
Fig. 2 is a flowchart illustrating an element scaling control method according to a second embodiment of the present invention, where the present embodiment is optimized based on the above-mentioned embodiments, and in the present embodiment, further specifying, according to a previous scaling information set and the current scaling information set, a current target scaling value corresponding to the first scaling event as: determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula; taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement; and determining the function value as a current target scaling value corresponding to the first scaling event.
Meanwhile, in this embodiment, after determining the current target scaling value corresponding to the first scaling event, the optimizing further includes updating and saving the current scaling information group based on the current target scaling value.
In addition, the implementation further controls the scaling and displaying of the selected element according to the current target scaling value, which is embodied as: obtaining a last coordinate value corresponding to each key point in the selected element after the response of the second zooming event; determining a current coordinate value corresponding to each key point under the first zooming event according to the current target zooming value and a previous coordinate value of each key point; and controlling each key point in the selected element to be adjusted to the current coordinate value from the last coordinate value and displaying the zoomed selected element.
As shown in fig. 2, a method for controlling scaling of an element according to a second embodiment of the present invention specifically includes the following operations:
s201, receiving a first zooming event acted on the selected element at the current moment.
Illustratively, during the zooming movement operation of the user on the selected element through the finger, the action on the selected element at the current moment forms a first zooming event to be responded, and the step can receive the first zooming event.
S202, determining a current zooming information group corresponding to the first zooming event.
In this step, the current zoom information group of the first zoom event includes the current initial zoom value and the generation time of the current initial zoom value, and the current initial zoom value may be specifically considered to be fed back in real time after receiving the first zoom event based on the existing element touch zoom response mechanism.
S203, obtaining a previous zooming information group, wherein the previous zooming information group corresponds to a second zooming event acted on the selected element at the previous moment.
Based on the description of the first embodiment, the second zoom event is generated when the user zooms and moves the selected element at the previous time, and the second zoom event corresponds to the previous zoom information group required by the zoom response, and illustratively, the previous zoom information group includes the previous target zoom value and the determination time of the previous target zoom value.
It should be noted that the element scaling control method provided in this embodiment is applicable to each scaling movement performed on the selected element, and is equivalent to that the element scaling control method provided in this embodiment may be performed in a loop iteration in one scaling operation (from when the user's finger contacts the touch screen to perform the scaling movement to when the finger leaves the touch screen) on the selected element.
And S204, determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula.
In this step, according to a previous target scaling value required by a response of a second scaling event included in a previous scaling information group and a current initial scaling value according to a response of a first scaling event included in a current scaling information group, a given change rate calculation formula is substituted in combination with generation time of each scaling value, so as to obtain a current scaling change rate required for calculating the current target scaling value, where the current scaling change rate may be understood as a change rate between a current initial scaling value corresponding to the first scaling event at the current time and a previous target scaling value corresponding to the second scaling event at the previous time.
The specification to be described, the value of the current zoom change rate may be a positive number or a negative number, and if the value of the current zoom change rate is a positive number, it may be considered that the selected element is currently being subjected to the zoom-in operation; if the current zoom rate is negative, it may be assumed that a zoom-out operation is currently being performed on the selected element.
Further, the current zoom information group includes: a current initial zoom value and a generation time of the current initial zoom value; the last group of zoom information comprises: a last target zoom value and a determination time of the last target zoom value;
the rate of change calculation formula is expressed as:
And S205, taking the current scaling change rate as an independent variable of a selected function, and obtaining a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement.
Based on the above steps, after obtaining the current zoom value change rate, the present embodiment needs to determine the current target zoom value required by the first zoom event response according to the current zoom value change rate, specifically, in this step, a function required for calculating the current target zoom value may be selected, where the function needs to have a functional property of: when the independent variable is changed in the range of [ infinity, 0], the value of the function value is increased gradually in the range of [0,1 ]; meanwhile, when the independent variable changes in the interval of [0, + ∞ ], the value of the function value increases progressively in the interval of [1, + ∞ ].
In this embodiment, as long as the selected function satisfies the above-mentioned function property, the function can be used as the function on which the current target scaling value is determined. Illustratively, the selected function may be an exponential function, i.e., y ═ ax，a>1, in the exponential function, the argument x is the current scaling rate rscaleWhen a is a constant larger than 1, substituting the determined current zoom change rate into y ═ axA function value can be obtained that meets the value change requirement.
And S206, determining the function value as the current target scaling value corresponding to the first scaling event.
In this step, the determined function value may be used as a current target scaling value corresponding to the first scaling event, so as to perform scaling control on the selected element through the current target scaling value.
And S207, updating and storing the current zooming information group based on the current target zooming value.
In this embodiment, when the current target zoom value is determined, the current initial zoom value of the first zoom event included in the current zoom information group and the generation time of the current zoom value need to be combined, and this step may update the information included in the current zoom information group after the current target zoom value is determined, so as to update the information included in the current zoom information group to the current target zoom value and the determination time of the current target zoom value, and record the information, so that the information may be used to determine the target zoom value of the zoom event that acts on the selected element at the next time.
S208, obtaining a last coordinate value corresponding to each key point in the selected element after the response of the second zooming event.
In this embodiment, the position information of the selected element may be represented by position information of at least one key point, for example, if the selected element is a graph drawn by editing, vertex coordinates of a circumscribed rectangle included in the graph may be used as the key points of the selected element, and for example, if the selected element is a writing trace or a curve written by touch, considering that the writing trace is formed by connecting a plurality of coordinate points through a bezier curve, a plurality of coordinate points connected to form the writing trace may be selected as the key points.
Specifically, in the process of performing the zooming operation on the selected element, each time a zooming event is responded, the position information corresponding to the selected element under the zooming event can be obtained, and the position information of the selected element can be represented by the position information of the selected key point. In this step, the coordinate value corresponding to each key point on the selected element after the response of the second zoom event may be obtained, and for convenience of distinguishing, this embodiment is recorded as the previous coordinate value.
Fig. 3 is a diagram illustrating an example of corresponding key points when a selected element is a handwriting, and as shown in fig. 3, a handwriting 20 as the selected element is displayed in a display interface, and position information of the handwriting 20 may be represented by 3 key points (a start point 21, an end point 22, and any connecting line point 23), in this embodiment, after a second zoom event response applied to the handwriting 20, previous coordinate values of the 3 key points after the second zoom event may be obtained, respectively.
S209, determining a current coordinate value corresponding to each key point under the first zooming event according to the current target zooming value and the previous coordinate value of each key point.
In this embodiment, the current target zoom value may be regarded as a magnification value for zooming out or zooming in the selected element at the current time, and in this step, after the current target zoom value and a previous coordinate value representing each key point of the selected element are known, a current coordinate value to which each key point should correspond under the first zoom event may be obtained through product calculation.
Further, the determining, according to the current target scaling value and a previous coordinate value of each of the keypoints, a current coordinate value corresponding to each of the keypoints under the first scaling event includes:
determining a first reference coordinate value corresponding to each previous coordinate value in a reference coordinate system, wherein the reference coordinate system is preset according to the attribute characteristics of the selected elements; determining the product of the current target zoom value and each first reference coordinate value as a second reference coordinate value of each key point in the reference coordinate system; and converting to obtain the current coordinate value of each key point in the screen coordinate system based on each second reference coordinate value.
It should be noted that, the above-identified last coordinate value of each key point is a coordinate value corresponding to the selected element in the screen coordinate system, in this embodiment, it is considered that a reference coordinate system is constructed by using the selected element, and the selected element is subjected to zoom control by using the coordinate value of each key point in the reference coordinate system.
Generally, according to different attribute characteristics of the selected element, the selected origin of the constructed reference coordinate system is different, for example, when the selected element is a text, the top left corner vertex of a text box to which the text belongs is taken as the origin of the reference coordinate system, and when the selected element is a writing, the intersection point of the starting point and the end point of the writing is taken as the origin of the reference coordinate system, for example, fig. 4 shows an exemplary diagram of the constructed reference coordinate system when the selected element is the writing in the second embodiment of the present invention, as shown in fig. 4, the intersection point O' of the starting point 21 and the end point 22 in the writing 20 is taken as the origin of the reference coordinate system, and the axis on which the horizontal coordinate of the end point is located and the axis on which the vertical coordinate of the starting point is located are taken as the xy axis to form the reference coordinate system 24.
In this embodiment, a first reference coordinate value corresponding to a last coordinate value of each keypoint in the constructed reference coordinate system may be determined, and a product calculation may be performed between each first reference coordinate value and a current target zoom value as a zoom magnification, so that each obtained product value may be used as a second reference coordinate value of a corresponding keypoint, and in combination with each second reference coordinate value, a current coordinate value that each keypoint of the selected element should have in response to the first zoom event may be determined through coordinate transformation.
Illustratively, referring to fig. 4 above, it can be seen that the first reference coordinate values of the key points in the writing script 20 in the reference coordinate system 24 are (0px, 300px), (300px, 100px) and (700px, 0px), respectively, assuming that the determined current target scaling value is 1.1, then, as shown in fig. 5, the second coordinate values of the keypoints under the coordinate reference system 24 are (0px, 330px), (330px, 110px), and (770px, 0px), fig. 5 is an illustration diagram showing the current coordinate values of the key points in the constructed reference coordinate system when the selected element is handwriting in the second embodiment of the present invention, and finally, the present embodiment may obtain the current coordinate values of the second reference coordinate values in the screen coordinate system through coordinate transformation.
S210, controlling each key point in the selected element to be adjusted to the current coordinate value from the previous coordinate value, and displaying the zoomed selected element.
The step is equivalent to the operation of responding to the first zooming event, and realizes the zooming control of the selected element relative to the first zooming event, and specifically, the step can adjust the display position of each key point to the position corresponding to the current coordinate value and display the selected element after the position adjustment in real time after the current coordinate value of each key point in the selected element is obtained, so that the zooming response of the selected element at the current moment is realized.
The element scaling control method provided by the second embodiment of the present invention embodies the determination operation of the current target scaling value, and also embodies the scaling control operation of the selected element, in addition to the record updating operation of the current scaling information group. In the method provided by the second embodiment, the scaling information required by scaling of the selected element at the current moment is iteratively updated by using the scaling information obtained after scaling of the selected element at the previous moment, and the scaling position corresponding to the selected element in the current scaling event is determined by the re-determined scaling information, so that the scaling change process of the element is controlled by the gesture moving speed in the scaling movement of the finger of the user, thereby better reducing the scaling sensitivity in small-scale scaling, improving the effectiveness of scaling control, improving the scaling speed in large-scale scaling, and reducing the repeated execution times of the scaling operation of the user.
EXAMPLE III
Fig. 6 is a block diagram of an element scaling control apparatus according to a third embodiment of the present invention, where the apparatus is suitable for performing scaling control on a selected element in an interaction interface on an interactive smart tablet, where the apparatus may be executed by an element scaling control device, and the element scaling control device may be implemented by software and/or hardware. As shown in fig. 6, the apparatus includes: an information receiving module 31, a first determining module 32, an information obtaining module 33, a second determining module 34, and a zoom control module 35, wherein,
an information receiving module 31, configured to receive a first zooming event that acts on the selected element at the current time;
a first determining module 32, configured to determine a current zoom information group corresponding to the first zoom event;
an information obtaining module 33, configured to obtain a previous zooming information group, where the previous zooming information group corresponds to a second zooming event that has been applied to the selected element at a previous time;
a second determining module 34, configured to determine, according to a previous scaling information group and the current scaling information group, a current target scaling value corresponding to the first scaling event;
and the zooming control module 35 is configured to control zooming and displaying of the selected element according to the current target zooming value.
The element zooming control device provided by the third embodiment of the invention realizes that the zooming change process of the element is controlled by the gesture moving speed in the zooming movement of the finger of the user, thereby better reducing the zooming sensitivity in small-amplitude zooming, improving the effectiveness of zooming control, improving the zooming speed in large-amplitude zooming and reducing the repeated execution times of the zooming operation of the user.
Further, the second determining module 34 is specifically configured to:
determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula;
taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement;
and determining the function value as a current target scaling value corresponding to the first scaling event.
Further, the current zoom information group includes: a current initial zoom value and a generation time of the current initial zoom value;
the last group of zoom information comprises: a last target scaling value and a time of determination of the last target scaling value;
the rate of change calculation formula is expressed as:
Further, the apparatus further comprises:
and the information updating module is used for updating and saving the current zooming information group based on the current target zooming value after the current target zooming value corresponding to the first zooming event is determined.
Further, the zoom control module 35 includes:
a first obtaining unit, configured to obtain a last coordinate value corresponding to each key point in the selected element after the response of the second scaling event;
a first determining unit, configured to determine, according to the current target scaling value and a previous coordinate value of each of the key points, a current coordinate value corresponding to each of the key points under the first scaling event;
and the adjusting control unit is used for controlling each key point in the selected element to be adjusted from the previous coordinate value to the current coordinate value and displaying the zoomed selected element.
Further, the first control unit is specifically configured to:
determining a first reference coordinate value corresponding to each previous coordinate value in a reference coordinate system, wherein the reference coordinate system is preset according to the attribute characteristics of the selected elements;
determining the product of the current target zoom value and each first reference coordinate value as a second reference coordinate value of each key point in the reference coordinate system;
and converting to obtain the current coordinate value of each key point in the screen coordinate system based on each second reference coordinate value.
Further, the selected elements include at least one of: handwriting, text, graphical shapes, multimedia, and tables.
The element scaling control device provided by this embodiment may be used to execute the element scaling control method provided by any of the above embodiments, and has corresponding functions and advantages.
Example four
Fig. 7 is a schematic structural diagram of an element scaling control device according to a fourth embodiment of the present invention. The element scaling control apparatus includes: a processor 40, a memory 41, a display 42, an input device 43, and an output device 44. The number of the processors 40 in the element scaling control apparatus may be one or more, and one processor 40 is taken as an example in fig. 7. The number of the memories 41 in the element scaling control device may be one or more, and one memory 41 is taken as an example in fig. 7. The processor 40, the memory 41, the display 42, the input means 43 and the output means 44 of the element scaling control device may be connected by a bus or other means, as exemplified by the bus connection in fig. 7. In an embodiment, the element scaling control device may be a computer, a mobile phone, a tablet, an interactive smart tablet, or the like.
The memory 41 serves as a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the element scaling control apparatus according to any embodiment of the present invention (for example, the information receiving module 31, the first determining module 32, the information acquiring module 33, the second determining module 34, and the scaling control module 35 in the element scaling control device). The memory 41 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory 41 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 41 may further include memory located remotely from processor 40, which may be connected to devices through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The display screen 42 may be a touch-enabled display screen 42, which may be a capacitive screen, an electromagnetic screen, or an infrared screen. In general, the display screen 42 is used for displaying data according to an instruction of the processor 40, such as displaying a stereoscopic element, a planar element, and other elements besides the elements projected in a canvas, and receiving a touch operation applied to the display screen 42 and transmitting a corresponding signal to the processor 40 or other devices.
The input means 43 may be used for receiving input numeric or character information and generating key signal inputs related to user settings and function controls of the presentation apparatus, and may be a camera for acquiring images and a sound pickup apparatus for acquiring audio data. The output device 44 may include an audio device such as a speaker. It should be noted that the specific composition of the input device 43 and the output device 44 can be set according to actual conditions.
The processor 40 executes various functional applications of the device and data processing, i.e., implements the element scaling control method described above, by executing software programs, instructions, and modules stored in the memory 41.
The element scaling control device provided above may be used to perform the element scaling control method provided in any of the above embodiments, with corresponding functions and benefits.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a method for element scaling control, including:
determining the line point projection information of each three-dimensional element displayed in the canvas; in response to receiving a selected operation acting on any line segment element in the canvas, obtaining line point information for the selected line segment; in response to receiving a movement operation acted on the selected line segment, determining a movement vector corresponding to the line segment to be adsorbed; determining a target three-dimensional element to be adsorbed by the selected line segment according to the line point information, the motion vector and the line point projection information of each three-dimensional element; controlling the selected line segment to be adsorbed to the target three-dimensional element; and displaying the combined stereo elements formed after adsorption.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the operations of the element scaling control method described above, and may also perform related operations in the element scaling control method provided by any embodiment of the present invention, and has corresponding functions and beneficial effects.
From the above description of the embodiments, it is obvious for a person skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the element scaling control method according to any embodiment of the present invention.
It should be noted that, in the element scaling control apparatus, each unit and each module included in the apparatus are only divided according to functional logic, but are not limited to the above division as long as the corresponding function can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. An element scaling control method, comprising:
receiving a first zooming event acted on the selected element at the current moment;
determining a current zoom information group corresponding to the first zoom event;
obtaining a previous zooming information group, wherein the previous zooming information group corresponds to a second zooming event acted on the selected element at the previous moment;
determining a current target scaling value corresponding to the first scaling event according to a previous scaling information group and the current scaling information group, wherein the current scaling information group comprises: a current initial zoom value and a generation time of the current zoom value; the last group of zoom information comprises: a last target zoom value and a determination time of the last target zoom value;
controlling the selected element to be zoomed and displayed according to the current target zooming value;
the determining a current target scaling value corresponding to the first scaling event according to the previous scaling information group and the current scaling information group includes:
determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula;
taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement;
and determining the function value as a current target scaling value corresponding to the first scaling event.
2. The method of claim 1,
the rate of change calculation formula is expressed as:
3. The method of claim 1, after determining a current target scaling value corresponding to the first scaling event, further comprising:
and updating and saving the current scaling information group based on the current target scaling value.
4. The method of claim 1, wherein said controlling the scaling and presentation of said selected element according to said current target scaling value comprises:
obtaining a last coordinate value corresponding to each key point in the selected element after the response of the second zooming event;
determining a current coordinate value corresponding to each key point under the first zooming event according to the current target zooming value and a previous coordinate value of each key point;
and controlling each key point in the selected element to be adjusted to the current coordinate value from the last coordinate value and displaying the zoomed selected element.
5. The method of claim 4, wherein determining a current coordinate value corresponding to each of the keypoints under the first scaling event according to the current target scaling value and a previous coordinate value of each of the keypoints comprises:
determining a first reference coordinate value corresponding to each previous coordinate value in a reference coordinate system, wherein the reference coordinate system is preset according to the attribute characteristics of the selected elements;
determining the product of the current target zoom value and each first reference coordinate value as a second reference coordinate value of each key point in the reference coordinate system;
and converting to obtain the current coordinate value of each key point in the screen coordinate system based on each second reference coordinate value.
6. The method of any of claims 1-5, the selected elements comprising at least one of: handwriting, text, graphical shapes, multimedia, and tables.
7. An element scaling control apparatus, comprising:
the information receiving module is used for receiving a first zooming event acted on the selected element at the current moment;
a first determining module, configured to determine a current zoom information group corresponding to the first zoom event;
an information obtaining module, configured to obtain a previous zoom information group, where the previous zoom information group corresponds to a second zoom event that was applied to the selected element at a previous time;
a second determining module, configured to determine, according to a previous scaling information group and the current scaling information group, a current target scaling value corresponding to the first scaling event, where the current scaling information group includes: a current initial zoom value and a generation time of the current zoom value; the last group of zoom information comprises: a last target zoom value and a determination time of the last target zoom value;
the zooming control module is used for controlling zooming and displaying of the selected element according to the current target zooming value;
a second determining module, specifically configured to: determining the current zooming change rate according to the previous zooming information group and the current zooming information group in combination with a change rate calculation formula; taking the current scaling change rate as an independent variable of a selected function to obtain a corresponding function value under the current scaling change rate, wherein the selected function is a function of which the function property meets the set requirement; and determining the function value as a current target scaling value corresponding to the first scaling event.
8. An element scaling control apparatus, characterized by comprising: a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the element scaling control method of any of claims 1-6.
9. A storage medium containing computer-executable instructions for performing the element scaling control method of any of claims 1-6 when executed by a computer processor.
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