JP4723010B2 - Server device, server / client system, server program, and recording medium recording the same - Google Patents

Description

  The present invention records a server / client system capable of operating an application program of a server device from a client device between the server device and the server device connected to the network and the client device, the server program, and the program thereof The present invention relates to a recording medium.

  As remote operation software for remotely operating a remote computer on a network, for example, VNC (Virtual Network Computing) is known. Since VNC has been developed as platform-independent software, clients (terminals) installed with VNC can communicate with each other regardless of the type of platform such as an OS.

  In an information system of a company or the like, a computer (client) used by an individual has only a minimum function, and when managing resources such as application programs on the server side, the server application program is downloaded from each computer. Use with VNC.

  In the VNC, an image displayed on the server device is transmitted to the client device, an image received on the client device side is displayed, and the server device is operated on the image displayed on the client device as necessary. it can.

  Patent Document 1 describes a system that can display a part of an image of a server device, preferably a specific application program, on a client device. In this system, information (window and control information) of an application program displayed on the server device is transmitted to a client device composed of a communication terminal, and the transmitted information is reconfigured to fit the screen on the client device. Thus, the information displayed on the server device can also be displayed on the client device.

  In Patent Document 2, an operation screen of an application program executed on a server device is disassembled and recognized as display elements, and individual display elements and combinations of display elements are displayed on a client device including an information terminal device to be displayed to a user. The operation is described.

  Patent Document 3 describes switching of a video signal output from an application of a receiving-side terminal device (server device) based on a switching instruction from a transmitting-side device (client device).

Special Table 2009-500763 (published January 8, 2009) JP 2007-11531 A (published on January 18, 2007) JP 2004-259263 A (published September 16, 2004)

  However, when using VNC, in the systems described in Patent Documents 1 to 3, the data that can be transmitted to the client device is limited to the data of the application program in which the image is displayed on the server device. Other application programs cannot be used on the client device. In addition, in these systems, when an application program is operated on the server device, changes due to the operation are reflected in the image of the application program displayed on the client device, so that the operability of the application program on the client device is impaired. It will be.

  The present invention has been made in view of the above problems, and an object of the present invention is to operate a desired application program on the client device side regardless of the application program in which an image is displayed on the server device.

In order to solve the above-described problem, the server device according to the present invention transmits image data of an application program to one or more client devices in response to a request, and sends the image data to the application program by a control operation from the client device. A read-out means for individually reading out image data in each storage area in an image data storage means having a plurality of storage areas for storing image data of different application programs; , and transmitting means for transmitting to the client device to be transmitted, the storage area, is characterized that you different from the server storage area for storing image data used for the display of the server device.

  In order to solve the above problems, a server / client system according to the present invention includes one or more client devices and one or more server devices, and further includes an application program in the server device. Image data storage means having a plurality of storage areas for storing at least part of the image data of the image data, and the reading means receives the image data of each storage area in the image data storage means in response to a request from the client device. It is characterized by being read out individually.

In the server apparatus and the server / client system described above, when the server apparatus receives an application program operation request from the client apparatus, the image data stored in each storage area of the image data storage means is individually read by the reading means. The read image data is transmitted to the client device to be transmitted by the transmitting means. As a result, the client device can operate the application program of the received image data.

  Therefore, even if image data of an application program is displayed on the server device in the server device, the image data displayed on the client device is stored in a different area from the image data. This operation has no effect on the application program for image data displayed on the server device.

  The server device reads the image data based on a specific number that specifies at least one of the application program stored in the storage area and the storage area, and the specific number is a client device to be transmitted. It is preferable that the transmission means transmits image data based on the specific number. The server device may be provided in the server / client system.

Thus, based on a specific number, at least one of the application program, and a storage area stored in the storage area is the image data is read is identified and transmitted to the client device a specific number associated with . Thus, by providing a specific number, an application program to be read can be specified and easily transmitted to a requesting client device.

By the way, when using VNC, since all images of the application program displayed on the server device are transmitted to the client device, the operator of the client device operates the application program whose image is displayed on the server device. Can do. This is convenient for the operator of the client device, but on the other hand, it is disadvantageous for the administrator of the server device that even an application program that is not desired to be operated is operated. In order to avoid such an inconvenience, it is desirable to restrict the operation of the application program in the server device from the client device side.

  The same applies to the systems described in Patent Documents 1 to 3 in which substantially the same image as that of the application program displayed on the server device is displayed on the client device.

Therefore, in the server / client system, it is preferable that a specific number is assigned to at least one of the application program stored in the storage area and the storage area .

This makes it possible on the basis of the specific number, reads the image data to identify at least one application program, and a storage area stored in the storage area. Thus, by providing a specific number, an application program to be read can be specified and easily transmitted to a requesting client device.

  The server / client system preferably includes setting means for setting at least a part of the image data of the application program as a selection range. As a result, the image data transmitted to the client device is limited to the selected range, so that the range of application programs that can be operated from the client device can be limited. Therefore, it can be easily avoided that the application program is changed to an undesired state by an inadvertent operation from the client device.

  The server program of the present invention is a server program for causing a computer to function as any of the server devices described above, and is a program for causing the computer to function as each of the above means. The server program is recorded on a computer-readable recording medium. Thus, the server apparatus can be realized by causing a computer to read and execute the server program.

  As described above, the server device according to the present invention transmits image data of an application program to one or more client devices in response to a request, and accepts an operation to the application program by a control operation from the client device. A server device, a reading means for individually reading image data in each storage area in an image data storage means having a plurality of storage areas for storing image data of different application programs, and the read image data as transmission targets Transmitting means for transmitting to the client device.

  In addition, as described above, the server / client system according to the present invention includes one or more client devices and one or more server devices, and further includes image data of an application program in the server device. Image data storage means having a plurality of storage areas for storing at least a part thereof is provided on either the client device side or the server device side, and the reading means stores the image data storage in response to a request from the client device. The image data in each storage area in the means is individually read out.

  Thereby, in the server apparatus, it is possible to prevent the operation performed on the client apparatus from affecting the application program of the image data displayed on the server apparatus. Therefore, it is possible to improve the maintainability of the application program in the server device and improve the operability of the application program in the client device.

It is a block diagram which shows the structure of the server client system which concerns on embodiment of this invention. It is a flowchart which shows the registration processing procedure by the setting registration part of the server part in the said server client system. It is a flowchart which shows the process sequence of the data reading by the data reading part of the server part in the said server client system. It is a block diagram which shows the structure of the said server client system containing a server computer and multiple each of clients. (A) is a figure which shows the image of the application program containing the rectangular image (selection image) which the said client computer acquires from a server computer, (b) is the state by which the acquired rectangular image was displayed on the display device of the client apparatus FIG. (A) is a figure which shows the other image of the application program containing the rectangular image which the said client computer acquires from a server computer, (b) shows the state by which the acquired rectangular image was displayed on the display device of the client apparatus. It is another figure.

  An embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, a server / client system 10 according to the present embodiment includes a server computer 1 (server device) and a client computer 2 (client device), which are connected to a network 3 such as a LAN or the Internet. It is comprised so that it may connect via.

  The server computer 1 includes a server unit 11, a storage device 12, a display memory 13, a display device 14, and a communication interface unit (indicated by “IF” in the figure) 15, and is configured by a personal computer, for example. ing.

  The storage device 12 is composed of a hard disk device or the like, and stores various application programs and a setting file SF1. The setting file SF1 includes the IP address and ID of the client computer 2, an application designation number, and rectangular range data (selection range data).

  The storage device 12 includes a server expansion area 121. The server development area 121 is an area provided for developing image data of an application program to be displayed on the display device 14 of the server computer 1. The server development area 121 is provided to store image data of the application program displayed on the display device 14 in a state where the application program is activated.

The application designation number is a number for designating an application program operated on the client computer 2 side. This application designation number is associated with the start address of the partitioned areas AP1, AP2,..., APn, which will be described later, where the image data of the designated application program is expanded. As described above, the application designation number may be set in association with the divided areas AP1, AP2,..., APn , but may be set so as to directly designate the application program. Specifically, since rectangular range data described later is set in the application program, the application specified number is directly associated with the application program by assigning rectangular range data described later to the application specified number.

  The rectangular range data is data indicating a rectangular range set in advance for specifying a portion displayed on the client computer 2 in the image of the designated application program. The rectangular range data includes, for example, coordinate data of two apex angles that face each other in the rectangular area.

  The setting file SF1 is provided for each server computer 1. The setting file SF1 may include a password.

  The display memory 13 is a memory for storing image data of the application program, and is configured by, for example, a VRAM. The display memory 13 includes a client development area 131. The client development area 131 is an area provided for developing an application program to be displayed on the display device 23 of the client computer 2. The client development area 131 is divided into divided areas AP1, AP2,..., APn (storage areas) for each image data of the application program. As a result, the image data of each application program is developed in the partitioned areas AP1, AP2,. That is, one application program is developed and stored in one section area.

The server unit 11 is a functional block realized by the CPU executing a server program. The server unit 11 has a server function for causing the client computer 2 to operate an application program. With this server function, image data for operating the application program requested by the client computer 2 is provided to the client computer 2. The server unit 11 includes a memory expansion unit 111, a setting registration unit 112, and a data reading unit 113 in order to realize this function.

When the server computer 1 executes the application program, the memory development unit 111 reads the application program from the storage device 12 and develops the image data in the server development area 121. The memory expansion unit 111, when starting the server computer 1, an application program specified by the application designation number from the storage device 12, expand the data of the image to the client for deployment region 131 of the display memory 1 3 .

  The setting registration unit 112 sets the IP address, ID, application designation number, and rectangular range data input by the user by creating the setting file SF1 described above. The setting registration unit 112 also registers in the storage device 12 an application program that can allow the client computer 2 to operate.

  The setting registration unit 112 displays a dialog box (not shown) for inputting these as a user interface for setting the IP address and ID regarding the creation of the setting file SF1. This dialog box may be provided with a box for inputting a password if necessary.

  In addition, the setting registration unit 112 displays a dialog box (not shown) for assignment as a user interface for assigning an application designation number and a rectangular area (selection area). This allocation is performed using the above dialog box by selecting a rectangular area in a state where an image of the application program designated by the application designation number is displayed. The rectangular area is selected by a general method such as moving the mouse in a clicked state.

  This dialog box has a box for inputting an application designation number, a file name box for displaying the file name of the setting file SF1, and a rectangular range box (selection range box) for displaying the range of the selected rectangular area. ing. In the file name box, when a new setting file SF1 is created, the automatically set file name is displayed. When the already created setting file SF1 is updated, it is selected by selecting from the list of file names. The file name of is displayed. The range of the selected rectangular area is defined as the coordinates of two opposing vertices (for example, the lower left and upper right) of the rectangular area, and the coordinates of the two points are displayed in the rectangular area box. When the rectangular range is specified, the setting registration unit 112 sets the start address and the end address of the data in the rectangular area specified by the rectangular range in combination with the rectangular range data in the client development area 131.

  The setting registration unit 112 registers the setting by writing the IP address, ID, application designation number, and rectangular range in the setting file SF1 having the above file name and saving the setting file SF1 in the storage device 12.

  In response to a connection request from the client computer 2, the data reading unit 113 reads the rectangular area data set from the image data of the application program developed in the display memory 13 and transmits it to the client computer 2. Specifically, the data reading unit 113 compares the IP address and ID transmitted from the client computer 2 together with the connection request with the IP address and ID set in the setting file SF1, and if both match, The rectangular area data is read with reference to the setting file SF1 specified by the IP address and ID.

  The ID may include a code representing authority. Thereby, the data reading unit 113 may change the application program that can be operated according to the authority.

  Based on the head address associated with the application designation number in the specified setting file SF1, the data reading unit 113 identifies the area in which the image data of the designated application program is developed in the client development area 131. . In addition, the data reading unit 113 reads the data of the rectangular area determined by the rectangular range data in the setting file SF1 from the specified area in the range from the above-mentioned start address to the end address. Then, the data reading unit 113 passes the read rectangular area data to the communication interface unit 15 so as to be transmitted to the client computer 2.

Alternatively, the data reading unit 113 may directly read the data in the rectangular area from the client development area 131 based on the above-described start address and end address set in the setting file SF1. This eliminates the need to specify the area where the image data of the application program is expanded.

  Further, the data reading unit 113 changes the rectangular area to be transmitted to the client computer 2 each time there is a change in the image data developed in the client development area 131 by the operation of the application program by the client computer 2. Read data. The data reading unit 113 outputs only the portion that has changed due to the above operation as the difference data during the reading. By transmitting the difference data to the client computer 2, the transmission time can be shortened compared to transmitting the image data of the rectangular area as it is.

  The data reading unit 113 corrects the display position of the rectangular area. When the display screen size of the display device 23 of the client computer 2 is smaller than the display screen size of the display device 14 of the server computer 1, the rectangular area is displayed on the display device 23 depending on the position of the selected rectangular area. It may disappear. In order to avoid such an inconvenience, the coordinate value of the read data of the rectangular area is corrected so that the rectangular area is displayed near the lower left side of the display screen in the display device 23, for example. Specifically, the data reading unit 113 corrects the coordinates of one point (lower left corner) of the two vertices defining the rectangular range in the setting file SF1 to (0, 0), and the other vertex The coordinates of are corrected accordingly. As a result, the vertex at the lower left corner of the rectangular area coincides with the display origin (lower left corner) of the display device 23, so that a case where an image in a rectangular range greatly separated from the display origin cannot be displayed on the display device 23 is greatly reduced. can do.

  By the way, the data reading unit 113 has a mouse emulation function. When the server computer 1 uses a USB-connected mouse as an input device, if the input device 24 of the client computer 2 described later is a mouse, the application program provided from the server computer 1 is operated by operating the mouse. be able to. However, when the input device 24 is a device other than a mouse, the form of the input signal is different, so that the operation of the input device 24 cannot be transmitted to the server computer 1 as it is. Therefore, the data reading unit 113 converts the output signal of the input device 24 transmitted from the client computer 2 into the form of a mouse output signal. Thereby, in the server computer 1, the input operation by the input device 24 is processed as having been performed by the USB mouse.

  The communication interface unit 15 is a communication processing unit for performing mutual communication with a device such as the client computer 2 connected to the network 3, and includes a socket for network communication. The communication interface unit 15 transmits a connection request from the client computer 2 to the server unit 11 and transmits transmission data from the server unit 11 (particularly, a data reading unit) to the client computer 2.

  The client computer 2 includes a client unit 21, a storage device 22, a display device 23, an input device 24, and a communication interface unit (indicated by “IF” in the figure) 25, and is configured by a personal computer, for example. ing.

  The storage device 22 is configured by a hard disk device or the like, and stores a setting file SF2. The setting file SF <b> 2 is set for the client computer 2 and is acquired from the server computer 1.

  The display device 23 is preferably a flat panel such as a liquid crystal panel. As the input device 24 for input operation, for example, when the client computer 2 is a programmable display or a panel computer, a touch panel is used.

  The client unit 21 is a functional block realized by the CPU executing a client program. The client unit 21 has a client function for operating an application program provided from the server computer 1. With this client function, an image of a rectangular area transmitted from the server computer 1 is displayed, and an environment for operating an application program using the input device 24 on the image is provided. The client computer 2 includes a display processing unit 211 and an input processing unit 212 in order to realize this function.

  The display processing unit 211 performs processing for displaying the rectangular area data transmitted from the server computer 1 on the display device 23 in response to a request from the client computer 2. In addition, when the display processing unit 211 receives the above-described difference data that reflects the change caused by the operation on the client computer 2 side, the display processing unit 211 applies the difference data to the image of the rectangular area already displayed on the display device 23. To be updated.

  The display processing unit 211 has a function as a scaler. When the rectangular area is not selected according to the screen display size of the display device 23, the rectangular area may be displayed extremely small or large with respect to the display screen of the display device 23. In order to avoid such inconvenience, the rectangular area is displayed in a size as close as possible to the size of the display screen of the display device 23 by enlarging or reducing the image of the rectangular area in accordance with the display capability of the display device 23. be able to. For the function of such a scaler, for example, a technique used in a television receiver or the like is used.

  When an input operation for a request for operating the application program of the server computer 1 is performed by the user using the input device 24, the input processing unit 212 outputs a request signal for the request. The input processing unit 212 reads out and outputs the IP address, ID, and application designation number from the setting file SF2 stored in the storage device 22 together with the request signal.

The communication interface unit 25 is a communication processing unit for performing mutual communication with a device such as the server computer 1 connected to the network 3, and includes a socket for network communication. The communication interface unit 25 receives and transmits a connection request to the server computer 1 from the input processing unit 212, and transmits received data from the server unit 11 to the client unit 21 .

  Here, the server program described above is recorded on a recording medium configured to be separable from the server computer 1, and can be installed in the server computer 1 from this storage medium. The above-described client program is recorded on a recording medium configured to be separable from the client computer 2 and can be installed in the client computer 2 from this storage medium.

  The recording medium is a computer-readable recording medium, such as a tape system such as a magnetic tape or a cassette tape, a magnetic disk system such as a flexible disk or a hard disk, an optical disk system such as a CD-ROM, MO, MD, or DVD, A card system such as an IC card (including a memory card) or an optical card is suitable. In addition, the program medium may be a medium that carries a fixed program including a semiconductor memory such as a mask ROM, EPROM, EEPROM, flash ROM, or the like.

  Further, if the server computer 1 and the client computer 2 are placed in an environment that can be connected to a communication network including the Internet, the medium may be a medium that fluidly carries the program so as to download the program from the communication network. . However, when the program is downloaded from the communication network in this way, the download program is preferably stored in advance in the server computer 1 and the client computer 2 or installed from another recording medium. .

  The registration process of the setting registration unit 112 in the server computer 1 of the server / client system 10 configured as described above will be described with reference to the flowchart of FIG.

  First, it is determined whether or not an application program that can be operated is registered (step S1). If registration is not performed, the process proceeds to step S6.

  If it is determined in step S1 that registration has been performed, it is determined whether registration has been performed for the client computer 2 that desires to operate the application program (S2). If registration has not been performed, registration is performed. Is performed (step S3). At this time, by registering the IP address and ID by the setting registration unit 112, the client computer 2 is registered and the application program is allocated (step S4). At this time, the setting registration unit 112 assigns the aforementioned application designation number and rectangular area. If registration is performed in step S2, the process proceeds to step S4.

Stored in the storage device 12 the registered set data as described above as the configuration file SF1 (step S5). Then, it is determined whether or not registration processing is subsequently performed (step S6). Here, if the registration process is not performed, the process is terminated, whereas if the registration process is continued, the process proceeds to step S1.

  Next, the rectangular area data reading process of the data reading unit 113 and the data transmission process of the communication interface unit 15 in the server computer 1 will be described with reference to the flowchart of FIG.

  First, in a standby state in which a connection request is received from the client computer 2 (step S11), when a connection request is received, setting data for specifying the client computer 2 is collated (step S12). At this time, the data reading unit 113 collates the IP address and ID received from the client computer 2 with the IP address and ID registered in the setting file SF1. As a result of the setting data collation, it is determined whether or not they match (step S13). If the two do not match, error information is transmitted to the client computer 2. The client computer 2 displays a message indicating that the connection request is rejected on the display device 23 based on the error information.

  If the two match in step S13, the data of the rectangular area set in advance is read from the display memory 13 (step S15). At this time, the image data of a desired rectangular area is read from the client development area 131 by the data reading unit 113 based on the application designation number and the rectangular range data read from the setting file SF1. Then, the read image data is transmitted to the client computer 2.

  In the client computer 2, when the image data is received, the display processing unit 211 displays an image of the selected rectangular area on the display device 23 based on the image data. In the client computer 2, when an application program is operated on the displayed image by the user using the input device 24, operation information based on an input signal of the input device 24 is transmitted to the server computer 1. In the server computer 1, an application program operates based on the received operation information, and a change due to the operation is reflected in the image data developed in the client development area 131.

  After the image data of the rectangular area is transmitted to the client computer 2, it is determined whether or not there is the above change (step S17). If there is a change, the image data developed in the client development area 131 is determined. Difference data corresponding to the change is extracted from (step S18). Further, the extracted difference data is transmitted to the client computer 2 (step S19). At this time, in the client computer 2, the rectangular image displayed on the display device 23 changes based on the received difference data. Then, it is determined whether or not registration processing is subsequently performed (step S20). Here, when the registration process is not performed, the data reading process and the data transmission process are terminated. On the other hand, when the process is continued, the process proceeds to step S11.

  Next, specific examples of transmission request, transmission, reception, and display of a rectangular image will be described.

  Here, as shown in FIG. 4, a server / client system 10 in which two server computers 101 and 102 and three client computers 201, 202, and 203 are connected via a network 3 will be described.

  First, it is assumed that an operation of an application program for an image 301 shown in FIG. 5A among the images developed in the client development area 131 of the server computer 101 is requested from the client computer 201. For this image 301, rectangular range data representing a rectangular area X1 near the upper left corner is set in the setting file SF1. When the server computer 101 receives the above request due to the matching of the IP address and ID, the server computer 101 transmits the data in the rectangular area X1 to the client computer 201. As a result, an image of the rectangular area X1 is displayed on the display device 23 of the client computer 201 as shown in FIG.

  Next, it is assumed that the client computer 201 requests the operation of the application program of the image 302 shown in FIG. 6A among the images developed in the client development area 131 of the server computer 102. For this image 302, rectangular range data representing the rectangular area X2 near the upper right end is set in the setting file SF1. When the server computer 102 receives the above request due to the matching of the IP address and ID, the server computer 102 transmits the data in the rectangular area X2 to the client computer 201. At this time, the connection with the client computer 201 is switched from the server computer 101 to the server computer 102. As a result, an image of the rectangular area X2 is displayed on the display device 23 of the client computer 201 as shown in FIG. 6B.

  As described above, in the server / client system 10 according to the present embodiment, when a connection request from the client computer 2 is received, the application specified based on the application designation number and the rectangular range data set in the setting file SF1 in advance. A rectangular area in the image data of the program is specified and read out and transmitted to the client computer 2. Accordingly, the client computer 2 can operate a desired application program in which the received image data in the rectangular area is expanded in the client expansion area 131 only within the range of the selected rectangular area.

  Therefore, the operation of the application program from the client computer 2 can be limited to the minimum necessary. In order to further enhance the effect of this operation restriction, it is preferable to preliminarily define a portion that can be selected by the setting registration unit 112. For example, it is specified that the main part of the window can be selected but the control part of the window cannot be selected. As a result, it is possible to easily prevent the application program from being inadvertently terminated from the client computer 2 or changed to an undesirable state.

  In the server computer 1, even if the image data expanded in the server expansion area 121 of the storage device 12 is displayed on the display device 14, an application program for the image data is performed by an operation performed on the client computer 2 side. Has no effect.

  Further, the same application designation number may be associated with different IDs. Thereby, a common application program can be operated from a plurality of client computers 2 set with the same application designation number. As a result, a rectangular image reflecting the operation in each client computer 2 is displayed on any client computer 2.

  Further, since images of a plurality of application programs are expanded in the client expansion area 131, the number of application programs that can be designated from the client computer 2 is increased by increasing the size of the display memory 13 and expanding the client expansion area 131. Can be increased.

  Since the server / client system 10 according to the present embodiment exhibits the advantageous effects as described above, the applicable fields are wide.

  For example, at the manufacturing site, not all the images displayed on the management device side are displayed on the operation terminal device that gives various instructions, but only the minimum necessary instruction input portion image is selected and displayed on the terminal device. Display. Thereby, it can avoid that the worker on site operates to the part which only an administrator operates.

Further, an image for monitoring operation to be displayed on a programmable display device out Ri's only switching required portion from the server computer 1, it can also be displayed on the client computer 2.

  It is also possible to select an image common to the plurality of client computers 2 from the server computer 1 and an individual image to the client computer 2 and send these images together to each client computer 2. Thereby, in the correspondence education system etc., the part (question) to be sent to everyone and the part (answer) to be sent individually are cut out and combined and transmitted to each terminal. Or, in building management, from the image for air conditioning control created for air conditioning management of the entire building, the image describing the contact to each tenant and the image of air conditioning control of each tenant are read and combined. It is also possible to transmit to each tenant's terminal.

  Furthermore, since an arbitrary range of the image data developed in the display memory 13 of the server computer 1 is selected, an image in a range corresponding to the display screen size of the display device 23 can be selected and displayed on the client computer 2. it can.

  In the present embodiment, the example in which the area to be operated by the client computer 2 is selected as a rectangle has been described. However, the present invention is not limited to this, and an area other than the rectangle may be selected if possible.

  The client development area 131 of the display memory 13 may be provided in a completely different memory, for example, a USB memory (external memory) connected to the server computer 1 or a memory in the client computer 2. However, when an area equivalent to the client development area 131 is provided in the memory of the client computer 2, the operation of developing the image data of the application program into the memory and the operation of reading the image data from the memory are described above. Different from the case of. Specifically, the memory development unit 111 instructs the client unit 21 to develop the image data of the application program in the memory, and the data reading unit 113 instructs the client unit 21 to obtain the image data from the memory. The data is read and the display processing unit 211 performs display processing.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

Server-client system of the present invention, developed in each application program image of the application program of the server device to a particular storage area of the server device, in response to a request from a client device, an application program loaded into the storage area Among them, since a rectangular area selected in advance from an image of an application program designated in advance is read and transmitted to the client apparatus, only the image of the rectangular area is transferred to the client apparatus regardless of the image of the application program displayed on the server apparatus It is possible to limit the operation of the application program within the range of the rectangular area, and it can be suitably used to limit the operation of the application program by the client device.

1 Server computer (server device)
2 Client computer (client device)
DESCRIPTION OF SYMBOLS 10 Server client system 11 Server part 12 Storage device 13 Display memory (image data storage means)
15 Communication interface section (transmission means)
25 Communication interface unit 112 Setting registration unit (setting unit)
113 Data reading part (reading means )
1 21 Server expansion area (server storage area)
131 Client development area AP1 to APn Partition area (storage area)

Claims (5)

A server device that transmits image data of an application program to one or more client devices in response to a request, and accepts an operation to the application program by a control operation from the client device,
Reading means for reading out image data of each storage area in the image data storage means for have a plurality of storage regions divided for each application program for storing image data of different application programs separately,
Transmission means for transmitting the read image data to a client device to be transmitted,
The storage area is different from a server storage area for storing image data used for display of a server device,
Setting storage means for storing a setting in which an application designation number for designating an application program to be expanded in the storage area is associated with a start address and an end address of data in a rectangular area selected in the image data;
The reading unit reads the data of the rectangular area in the image data in the range from the start address to the end address associated with the application designation number stored in the setting storage unit;
The application specified number is associated with a client device to be transmitted;
The server device, wherein the transmission means transmits image data based on the application designation number. Setting means for setting at least a part of the image data of the application program as a selection range for specifying the rectangular area;
The server device according to claim 1, wherein the transmission unit transmits the selection range to the client device. 1 or 2 or more client devices, and 1 or 2 or more server devices according to claim 1 or 2,
Furthermore, the image data storage means,
The server / client system, wherein the reading unit individually reads image data in each storage area in the image data storage unit in response to a request from the client device.   A server program for causing a computer to function as the server device according to claim 1 or 2 or the server device in the server / client system according to claim 3, wherein the computer functions as the reading unit and the transmitting unit. Server program.   The computer-readable recording medium which recorded the server program of Claim 4.

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