CN113655976A - Multi-source screen projection method and system of electronic whiteboard - Google Patents
Multi-source screen projection method and system of electronic whiteboard Download PDFInfo
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Abstract
The invention discloses a multi-source screen projection method and a system of an electronic whiteboard, wherein the method comprises the following steps: embedding at least one screen projection application SDK in a whiteboard application, and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the two SDKs; receiving at least one screen projection request sent by at least one screen projection device, and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object; responding to the at least one screen projection request, and drawing at least one corresponding screen projection window in the electronic whiteboard; and acquiring the at least one screen projection object from the screen projection application SDK, and projecting the screen projection data in a corresponding screen projection window after analysis. According to the invention, different screen projection sources are displayed on the electronic whiteboard at the same time, window display of different projection data is realized, and various requirements are met efficiently in occasions such as teaching and meetings.
Description
Technical Field
The invention relates to the technical field of electronic whiteboards, in particular to a multi-source screen projection method and a system of an electronic whiteboard.
Background
Along with the development of intelligent technology, the types of electronic products contacted by people in daily life are increasingly rich, wherein interactive electronic products are widely applied to occasions such as conferences and teaching due to good human-computer interaction experience, and can be matched with tools such as a projector and a computer to realize functions such as dustless writing, random writing and remote communication.
At present, a screen projection mode realized by software appears on the market, and the screen projection software and the electronic whiteboard software are two independent applications and run in different processes. The existing electronic whiteboard can realize hardware screen projection, and the hardware is mainly projection equipment such as a projector. However, the existing screen projection technology cannot realize the compatibility of software screen projection and hardware screen projection:
firstly, in the screen projection software of the Android terminal in the market at present, no matter the screen is projected by software or a screen projector, a screen projection picture cannot be displayed in a white board in a windowing mode.
Second, to realize that the multisource throws the screen, must install a plurality of screen APP of throwing, and each throws the screen source mutually independent, unable communication, many scenes can't be realized under the circumstances that the screen was thrown simultaneously to the multisource.
In view of this, it is necessary to improve the screen projection method of the existing electronic whiteboard, so that the software screen projection and the hardware screen projection are compatible on the electronic whiteboard, and the multi-source screen projection realizes windowed display on the electronic whiteboard, so as to facilitate the subsequent lecture operation.
Disclosure of Invention
In view of the above-mentioned defects, the technical problem to be solved by the present invention is to provide a multi-source screen projection method and system for an electronic whiteboard, so as to solve the problem that the electronic whiteboard of the prior art cannot be compatible with software screen projection and hardware screen projection.
In a first aspect, the present invention provides a multi-source screen projection method for an electronic whiteboard, including the following steps:
embedding at least one screen projection application SDK in a whiteboard application, and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the two SDKs;
receiving at least one screen projection request sent by at least one screen projection device, and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
responding to the at least one screen projection request, and drawing at least one corresponding screen projection window in the electronic whiteboard;
and acquiring the at least one screen projection object from the screen projection application SDK, and projecting the screen projection data in a corresponding screen projection window after analysis.
In the above method, preferably, the at least one screen projection application SDK includes:
the software screen projection SDK is used for receiving screen projection requests and screen projection data sent by at least one screen projection software;
and the hardware screen projection SDK is used for receiving screen projection requests and screen projection data sent by at least one screen projector.
In the above method, preferably, the method further comprises the steps of:
acquiring an operation function on the electronic whiteboard, and identifying the function type and the operation position of the operation function;
and responding to the operation function according to the operation position.
In the above method, preferably, the screen projection data is drawn in the screen projection window by a sub-thread of the whiteboard application using TextureView as a carrier.
In the above method, preferably, the method further comprises:
the operation position is in a screen projection window, and according to the operation position, responding to the operation function comprises the following steps:
the operation function is clicking, and the current screen-projecting window is converted into an editable state;
the operation function is sliding, the current screen projection window moves along with the track of the operation position, and the current screen projection window is kept to float above other screen projection windows;
and the operation function is double clicking, and screenshot storage is carried out on the current screen projection window.
Further, in the above method, preferably, the operation position is outside the screen projection window, and according to the operation position, responding to the operation function includes:
the operation function is clicking, and the screen-projecting window is converted into a non-editable state;
the operation function is double-click, and screenshots of the display area of the current electronic whiteboard are saved.
In the above method, preferably, the whiteboard application establishes a communication channel with the screen projection application SDK through UPD or HTTP.
In the above-described method, it is preferable that,
the software screen projection SDK is connected with the screen projection software through the hot spot name of the electronic whiteboard;
and the hardware screen projection SDK is connected with the screen projector through the IP address of the electronic whiteboard.
In a second aspect, the present invention further provides a system for embedded multi-source screen projection in an electronic whiteboard, including:
the whiteboard application is embedded with at least one screen projection application SDK and enables the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the whiteboard application and the screen projection application SDK;
the receiving module is used for receiving at least one screen projection request sent by at least one screen projection device and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
the screen projection window generation module is used for responding to the at least one screen projection request and drawing at least one corresponding screen projection window in the electronic whiteboard;
and the releasing module is used for acquiring the at least one screen throwing object from the screen throwing application SDK, and releasing the screen throwing data into the corresponding screen throwing window after analysis.
In the above system, preferably, the system further includes a processing module, and the receiving module acquires an operation function on the electronic whiteboard, and identifies a function type and an operation position of the operation function; and the processing module responds to the operation function according to the operation position.
According to the technical scheme, the multi-source screen projection method and system of the electronic whiteboard provided by the invention solve the problem that the electronic whiteboard in the prior art cannot be compatible with software screen projection and hardware screen projection. Compared with the prior art, the invention has the following beneficial effects:
at least one screen projection application SDK is embedded in the whiteboard application of the electronic whiteboard, so that the screen projection device sends a screen projection request to the electronic whiteboard through the screen projection application SDK. The electronic whiteboard encapsulates screen projection requests and screen projection data of different screen projection devices into different screen projection objects, so that the multi-source screen projection data are distinguished in the electronic whiteboard, and mutual interference is avoided. The electronic whiteboard draws one or more screen projection windows in a display area of the electronic whiteboard according to one or more screen projection requests, so that screen projection data of each screen projection source are projected into the corresponding screen projection window, different screen projection sources are displayed on the electronic whiteboard at the same time, windowed display of different projection data is achieved, and various requirements are met efficiently in occasions such as teaching and meetings.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a multi-source screen projection method of an electronic whiteboard according to embodiment 1 of the present invention;
FIG. 2 is a schematic interface diagram of the present invention for establishing a first relay module and a second relay module;
fig. 3 is a schematic structural view of the present invention having two screen projection windows.
FIG. 4 is a schematic diagram of the operation of the present invention after text labeling and selection.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
The electronic whiteboard is a relatively new product, collects high and new technology products researched and developed by a plurality of high-tech means such as a tip electronic technology, a software technology and the like, combines a computer and a projector, can realize paperless office and teaching, can directly write with a pen like a common whiteboard or a teaching blackboard, and then input into the computer, and has the advantages of the projector, the common whiteboard and the electronic whiteboard.
The interactive electronic whiteboard can be in information communication with a computer, the electronic whiteboard is connected to a PC, and the content on the PC is projected onto a screen of the electronic whiteboard by using a projector, so that the electronic whiteboard is equivalent to a handwriting board with a large area, can write and draw on the handwriting board randomly and can be displayed on the PC in real time, and the file is stored as a graphic file. This functionality typically requires a dedicated whiteboard software support. If the interactive whiteboard is used by a specific application program such as NETMEETING of MICROSOFT, the interactive whiteboard can communicate with other offices and meeting rooms through the network to realize the network meeting.
In order to solve the technical problem that an electronic whiteboard in the prior art cannot be compatible with software screen projection and hardware screen projection, the invention provides a multi-source screen projection method of the electronic whiteboard, which comprises the following steps:
embedding at least one screen projection application SDK in a whiteboard application, and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the two SDKs;
receiving at least one screen projection request sent by at least one screen projection device, and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
responding to the at least one screen projection request, and drawing at least one corresponding screen projection window in the electronic whiteboard;
and acquiring the at least one screen projection object from the screen projection application SDK, and projecting the screen projection data in a corresponding screen projection window after analysis.
The realization principle of the invention is as follows: only one screen projection application SDK is embedded in the whiteboard application of the electronic whiteboard, so that the screen projection device sends a screen projection request to the electronic whiteboard through the screen projection application SDK. The electronic whiteboard encapsulates screen projection requests and screen projection data of different screen projection devices into different screen projection objects, so that the multi-source screen projection data are distinguished in the electronic whiteboard, and mutual interference is avoided. The electronic whiteboard draws one or more screen projection windows in a display area of the electronic whiteboard according to one or more screen projection requests, so that screen projection data of each screen projection source are projected into the corresponding screen projection window, different screen projection sources are displayed on the electronic whiteboard at the same time, windowed display of different projection data is achieved, and various requirements are met efficiently in occasions such as teaching and meetings.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
Detailed description of the preferred embodiment
Referring to fig. 1, the multi-source screen projection method for an electronic whiteboard provided by the present invention includes the following steps:
s100, embedding at least one screen projection application SDK in the whiteboard application, and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the screen projection application SDK and the whiteboard application SDK;
s200, receiving at least one screen projection request sent by at least one screen projection device, and respectively encapsulating the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
s300, responding to the at least one screen projection request, and drawing at least one corresponding screen projection window in the electronic whiteboard;
s400, obtaining the at least one screen projection object from the screen projection application SDK, and projecting the screen projection data into a corresponding screen projection window after analysis.
In step S100, a screen application SDK (software Development kit) is launched to create a set of Development tools for application software for a specific software package, software framework, hardware platform, operating system, and the like, and generally, the SDK is an SDK used for developing an application program on the Windows platform. It may simply be some file that provides an application program interface for a certain programming language, but may also include complex hardware that can communicate with a certain embedded system. See fig. 2.
The screen projection device comprises a communication terminal such as a mobile phone, a computer and other equipment, and can also be a projector, an imager and other imaging equipment with a projection function.
Specifically, when the screen projection method is applied, data transmitted by different screen projection devices are stored as different screen projection objects in the electronic whiteboard, and are displayed through different screen projection windows. Therefore, the invention displays the screen projection data of a plurality of screen projection devices in a window manner, and is convenient for sharing multi-party data.
Preferably, in step S100, the whiteboard application establishes a communication channel with the screen projection application SDK through UPD or HTTP.
In order to ensure the accuracy of data transmission, an accurate connection needs to be established to ensure the stability of the communication channel. The udp (user Datagram protocol) protocol is a generic name of the user Datagram protocol, which is used for processing data packets in a network like the TCP protocol, and is a connectionless protocol. UDP has the disadvantage of not providing for packet packetization, packetization and the inability to order packets, i.e. after a message is sent, it cannot be known whether it arrives safely and completely. The main role of the UDP protocol is to compress network data traffic into packets. A TCP (transmission Control protocol) transmission Control protocol, which is a connection-oriented, reliable Transport layer (Transport layer) communication protocol based on byte stream, after the TCP establishes a connection, both communication parties can transmit data at the same time, and secondly, it is full duplex; in terms of ensuring reliability, an overtime retransmission and piggybacking confirmation mechanism is adopted, so that the completeness of data transmission can be ensured, and the stability of data transmission is improved.
Preferably, in step S300, the screen projection data is drawn in the screen projection window by a sub-thread of the whiteboard application using TextureView as a carrier. The TextureView can use transformation (translation, scaling, rotation, etc.), can also be placed in ListView or ScrollView, can use some characteristics of UI control, occupies less system resources, and can perform more flexible operations while ensuring the definition of a screen projection picture.
Preferably, in step S300, in response to the at least one screen projection request, drawing at least one corresponding screen projection window in the electronic whiteboard, further comprising the following specific steps: s310, drawing screen projection windows with the same number as the objects in a display area of the electronic whiteboard according to the number of the objects; s320, giving a unique label to each screen projection window, giving a unique label to each object, and enabling the label set of the screen projection window to be the same as the label set of the object. Correspondingly, in step S400, the at least one screen projection object is obtained from the screen projection application SDK, the screen projection data is projected in the corresponding screen projection window after being analyzed, and the screen projection data in each screen projection object is projected in the screen projection windows with the same label after being analyzed.
Referring to fig. 3, each screen projection object is separately packaged and stored, considering that different screen projection objects come from different screen projection sources. And in order to enable each screen projection object to have an independent screen projection window, counting and labeling the number of the screen projection objects, and enabling the projection content of the screen projection source to be matched with the screen projection window.
In the first embodiment, in consideration of differences of the screen projection devices, in step S100, the at least one screen projection application SDK may include only one software screen projection SDK or only one hardware screen projection SDK. The at least one screen projection application SDK may also include a software screen projection SDK and a hardware screen projection SDK. One software screen projection SDK can receive screen projection requests and screen projection data of one or more screen projection software; a hardware screen projection SDK may receive screen projection requests and screen projection data from one or more hardware screen projectors.
The hardware screen projection SDK is used for hardware screen projection of the screen projector and is fused in the electronic whiteboard and is not displayed on the display area of the electronic whiteboard any more, and the software screen projection SDK is used for software screen projection and is displayed in the display area of the electronic whiteboard, referring to fig. 2. The software screen projection mode comprises the adoption of communication terminals such as mobile phones, computers and other equipment, and the hardware screen projection mode comprises projectors, video cameras and other imaging equipment with a projection function. Due to the fact that the hardware screen projection and the software screen projection are different, different communication channels and communication connections are established between the hardware screen projection and the software screen projection and the electronic whiteboard.
Preferably, in step S100, the screen projection connections of the software screen projection and the hardware screen projection are respectively: the software screen projection SDK is connected with the screen projection software through the hot spot name of the electronic whiteboard; and the hardware screen projection SDK is connected with the screen projector through the IP address of the electronic whiteboard.
The software screen projection is applied to mobile communication equipment such as mobile phones and computer terminals, and the electronic whiteboard is provided with WIFI or WLAN hotspots for other mobile phone or computer equipment terminals to share, so that the function of logging in a network for surfing the Internet is realized, and screen projection data can be transmitted. And the hardware screen projection SDK is connected with the screen projector through the IP address of the electronic whiteboard. The hot spot name or the IP address is adopted to realize connection, and the connection mode is simple and has real-time performance.
Detailed description of the invention
In this embodiment, after both the software projection screen and the hardware projection screen are projected onto the electronic whiteboard, the electronic whiteboard may give specific response changes according to the types of the operation functions.
The method provided by the embodiment further comprises the following steps:
s610, acquiring an operation function on the electronic whiteboard, and identifying the function type and the operation position of the operation function;
and S620, responding to the operation function according to the operation position.
After the content of each screen projection source is projected to the electronic whiteboard, relevant operations are performed on the electronic whiteboard for facilitating communication and understanding. Therefore, the electronic whiteboard needs to perform corresponding operations according to different operations. Considering that a plurality of screen projection windows exist in a display area of the electronic whiteboard, and the operation position may be located in one of the screen projection windows, or may be located outside each screen projection window instead of a single screen projection window, it is necessary to judge the operation position to operate a certain screen projection window or the whole electronic whiteboard.
Specifically, the operation function includes, but is not limited to, a single click, a double click, a slide, and the like.
Preferably, in step S610, the determining whether the operation position is within the screen projection window according to the operation position of the operation function further includes:
s611, establishing a coordinate system in a display area of the electronic whiteboard;
s612, acquiring coordinates of the operation position;
s613, acquiring the coordinate area of each screen projection window;
and S614, judging whether the coordinates of the operation position fall in the coordinate area of each screen projection window.
In order to accurately judge the position relation between the operation position and each screen projection window, a coordinate system is established, each screen projection window has an independent coordinate system, and each screen projection window at least has an independent area in the presetting process. It should be noted that, as the position of the screen projection window may change along with the operation (such as zooming in, zooming out, dragging, etc.) received by the electronic whiteboard, a new coordinate region of the window should be acquired in real time.
And comparing the coordinates of the operation position with the area range of each screen projection window in a coordinate system, so as to quickly obtain whether the operation position corresponds to each screen projection window.
The operation position is in the projection window, or the operation position is outside the projection window. In step S620, if the operation position is within the screen projection window, the method includes the following specific steps:
the operation function is clicking, and the current screen-projecting window is converted into an editable state;
the operation function is sliding, the current screen projection window moves along with the track of the operation position, and the current screen projection window is kept to float above other screen projection windows;
and the operation function is double clicking, and screenshot storage is carried out on the current screen projection window.
In the preferred embodiment, the operation function can be identified as single click, double click and sliding, and different operations can be obtained according to different operation types. The editing items include, but are not limited to, labels, circle selections and the like, and an operator can select one of the editing items as required. Referring to fig. 4, the operation after the text marking and the circle selection is performed by the operator. In other preferred embodiments, the variety of the operation functions can be expanded, or two operations can be performed simultaneously, so that the flexibility of the operation can be improved by increasing the variety of the operation functions.
Preferably, in step S620, the operation position is outside the screen projection window, and the responding to the operation function according to the operation position further includes:
the operation function is clicking, and the screen-projecting window is converted into a non-editable state;
the operation function is double-click, and screenshots of the display area of the current electronic whiteboard are saved.
The preferred embodiment is basically the same as the operation mode of the step that the operation position falls in a certain screen projection window, except that the operation position does not fall in any screen projection window, and different responses are generated due to the difference of the operation positions, so that the screen projection window can be selected but cannot be edited when clicking. When sliding, the operation is considered invalid. And when double-clicking, screenshot storage is carried out on the electronic whiteboard and the whole display area.
In the second embodiment, the screen projection software and the whiteboard software have better interactivity when being used simultaneously, and can be explained by combining with a whiteboard during screen projection to perform operations such as annotation and screenshot on screen projection contents. The operation experience in many application scenes is more convenient, and the cross-process interaction is realized. For example, in the screen projection process, annotation explanation is required to be performed on a screen projected picture, a screen projected picture is shot and inserted into a white board for contrast explanation, the screen projection window is dragged and moved, zooming is performed, and the like.
In a second aspect, the invention further provides a system for embedded multi-source screen projection in an electronic whiteboard, which comprises a whiteboard application, a receiving module, a screen projection window generating module and a projection module.
The whiteboard application is used for embedding at least one screen projection application SDK and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the whiteboard application and the screen projection application SDK. The receiving module is used for receiving at least one screen projection request sent by at least one screen projection device and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object. And the screen projection window generation module is used for responding to the at least one screen projection request and drawing at least one corresponding screen projection window in the electronic whiteboard. And the releasing module is used for acquiring the at least one screen-throwing object from the screen-throwing application SDK, and releasing the screen-throwing data in a corresponding screen-throwing window after analysis.
The whiteboard application is located in the electronic whiteboard, and the screen projection application SDK is a set of development tools that create application software for a specific software package, software framework, hardware platform, operating system, and the like, and generally, the SDK is an SDK used for developing an application program under the Windows platform.
The receiving module is in communication connection with the whiteboard application and is used for acquiring a screen projection request of a screen projector and/or screen projection software, and packaging the screen projection request and received screen projection data into one object to obtain one or more objects. The information processing and acquiring module can adopt a processor or a control chip with an information processing function.
The screen projection window generation module is in communication connection with the receiving module and is used for drawing one or more screen projection windows in the display area of the electronic whiteboard in response to one or more screen projection requests. The generation of the screen projection window can adopt drawing applications such as TextureView, the screen projection data is subjected to sub-thread control by taking a drawing module as a carrier, the occupied system resources are less, and more flexible operations can be performed while the definition of a screen projection picture is ensured.
And the releasing module is respectively connected with the receiving module and the screen-projecting window generating module, acquires the at least one screen-projecting object from the screen-projecting application SDK, and releases the screen-projecting data in the corresponding screen-projecting window after analysis. The releasing module can adjust the position and the size of the released material to adapt to different screen releasing windows, and can set releasing frequency or time.
In the above system, preferably, the system further includes a processing module, and the receiving module acquires an operation function on the electronic whiteboard, and identifies a function type and an operation position of the operation function; and the processing module responds to the operation function according to the operation position. The processing module and the receiving module are connected to obtain an operation position. The processing module can be provided with a chip or an integrated circuit connected with the flexible substrate of the electronic whiteboard, and according to the operation function on the flexible substrate, the processing module makes a corresponding response to enable the electronic whiteboard to generate a corresponding display image.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (10)
1. A multi-source screen projection method of an electronic whiteboard is characterized by comprising the following steps:
embedding at least one screen projection application SDK in a whiteboard application, and enabling the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the two SDKs;
receiving at least one screen projection request sent by at least one screen projection device, and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
responding to the at least one screen projection request, and drawing at least one corresponding screen projection window in the electronic whiteboard;
and acquiring the at least one screen projection object from the screen projection application SDK, and projecting the screen projection data in a corresponding screen projection window after analysis.
2. The method of claim 1, wherein the at least one screen-casting application SDK comprises:
the software screen projection SDK is used for receiving screen projection requests and screen projection data sent by at least one screen projection software;
and the hardware screen projection SDK is used for receiving screen projection requests and screen projection data sent by at least one screen projector.
3. The method of claim 1, further comprising the steps of:
acquiring an operation function on the electronic whiteboard, and identifying the function type and the operation position of the operation function;
and responding to the operation function according to the operation position.
4. The method of claim 1, wherein the screen projection data is drawn within the screen projection window by a child thread of the whiteboard application in a TextureView carrier.
5. The method of claim 3, wherein the operational position is within a projection window, and wherein responding to the operational function according to the operational position comprises:
the operation function is clicking, and the current screen-projecting window is converted into an editable state;
the operation function is sliding, the current screen projection window moves along with the track of the operation position, and the current screen projection window is kept to float above other screen projection windows;
and the operation function is double clicking, and screenshot storage is carried out on the current screen projection window.
6. The method of claim 3, wherein the operational position is outside of the screen-projection window, and wherein responding to the operational function according to the operational position comprises:
the operation function is clicking, and the screen-projecting window is converted into a non-editable state;
the operation function is double-click, and screenshots of the display area of the current electronic whiteboard are saved.
7. The method of claim 1, wherein the whiteboard application establishes a communication channel with the screen projection application SDK via UPD or HTTP.
8. The method of claim 2,
the software screen projection SDK is connected with the screen projection software through the hot spot name of the electronic whiteboard;
and the hardware screen projection SDK is connected with the screen projector through the IP address of the electronic whiteboard.
9. The system for projecting screen by embedded multiple sources in electronic whiteboard is characterized by comprising:
the whiteboard application is embedded with at least one screen projection application SDK and enables the whiteboard application to acquire screen projection data transferred by the screen projection application SDK through a communication channel established between the whiteboard application and the screen projection application SDK;
the receiving module is used for receiving at least one screen projection request sent by at least one screen projection device and respectively packaging the at least one screen projection request and screen projection data thereof into at least one corresponding screen projection object;
the screen projection window generation module is used for responding to the at least one screen projection request and drawing at least one corresponding screen projection window in the electronic whiteboard;
and the releasing module is used for acquiring the at least one screen throwing object from the screen throwing application SDK, and releasing the screen throwing data into the corresponding screen throwing window after analysis.
10. The system according to claim 9, further comprising a processing module, wherein the receiving module acquires an operating function on the electronic whiteboard and identifies a function type and an operating position of the operating function; and the processing module responds to the operation function according to the operation position.
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