JPH04217158A - Control system for plotting means of plotting communication equipment - Google Patents

Abstract

PURPOSE:To attain the simultaneous write type plotting operations by attaining the input of a terminal write type plotting means which owns at least one token and then attaining the input of a terminal erasion type plotting means which owns all tokens. CONSTITUTION:When the communication is started, each terminal owns its own token and a pencil is selected as a plotting means. A pen input processing part of a plotting processing part 13 clears a plotting mode flag and waits for a state where a pen is put down on a tablet. When the pen is put down on the tablet, the plotting mode flag is set and the presence or absence of its own token is checked. If the presence of its own token is confirmed, a fact whether the selected plotting means is equal to an eraser or not. If so, a fact whether the partner token also exists or not. If so, the pen position is transmitted to the partner terminal like a case where the pencil is selected and the display of its own is changed. Then the pen position is repetitively transmitted to the partner terminal until the pen moves up from the tablet, and a pen locus is plotted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the drawing means of a drawing communication device having a drawing function based on handwritten input.

0002

2. Description of the Related Art There is known a drawing communication device having a terminal called a telewriting terminal, which communicates using drawing means based on handwritten input while viewing the same screen on the display of each terminal. This drawing communication device is provided with a writing type drawing means (pencil) and an erasing type drawing means (eraser). Here, the pencil connects the previous coordinates with the current coordinates with a straight line, and the eraser erases an area of a certain size centered on the current coordinates. These handwritten input means are used to facilitate communication such as teleconferences.

FIGS. 6A to 6C show an example of drawing in a telewriting terminal (hereinafter referred to as "terminal") of a conventional drawing communication device. First, it is assumed that the displays of terminal A and terminal B are in the same state as shown in FIG. 6(a). In this state, if terminal A uses a writing-type drawing means (pencil) and terminal B uses an erasing-type drawing means (eraser) on the same area on the display at the same time, terminal A first uses the pencil. The operation result is displayed on the display, and terminal B enters a state in which the eraser operation result is displayed (FIG. 6(b)). Next, through communication, the eraser operation reaches terminal A and the pencil operation reaches terminal B, and the operation results as shown in FIG. 6(c) are reflected on the display.

As is clear from the state shown in FIG. 6(c), there is a difference in the display states of the displays of both terminals. As a means to avoid this, only one token is introduced for the entire drawing communication device including multiple terminals in communication, and only the terminals that have the token can use the drawing means. , a method is used to prevent a situation in which both terminals use the drawing means at the same time.

[0005]

[Problem to be Solved by the Invention] With the control method for the drawing means as described above, there is no difference between the display states of both terminals, but the terminal that attempts to use the drawing means is There is a problem in that it is necessary to take only one token, and an extra control procedure has to be taken to obtain this token, making the control complicated. Furthermore, even though there is no difference in the display state between devices when using writing-type drawing devices such as pencils on multiple devices at the same time, only one device can operate them. There was also the problem that the other terminal could not be operated while the other terminal was in use, making operability extremely poor.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a drawing means control method for a drawing communication device that allows writing-type drawing to be performed simultaneously without creating a difference in the display of both terminals. It is in.

[0007]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the drawing means control method of the drawing communication device according to the present invention uses a plurality of terminals each having writing type and erasing type drawing means. In the drawing means control method of the drawing communication device configured, tokens provided according to the number of terminals are provided for controlling the input of the drawing means of each terminal,
The present invention is characterized in that it allows input to a writing-type drawing means of a terminal that holds at least one of the tokens, and allows input to an erasing-type drawing means of a terminal that holds all of the tokens. It is something.

[0008]

[Operation] In the drawing means control method of the drawing communication device according to the present invention, tokens are provided in accordance with the number of terminals in order to control input to the drawing means of each terminal forming the drawing communication device. Then, each terminal uses at least one of the tokens.
If you own one token, you can input the writing type drawing means, and only if you own all the tokens, you can input the erasing type drawing means of the terminal. Become.

[0009]

EXAMPLES Examples of the present invention will be described in detail below.

FIG. 1 is a block diagram showing the configuration of an embodiment of the drawing communication device of the present invention.

In the figure, reference numeral 10 is a handwriting input unit that detects the coordinates of handwritten input, 11 is a display unit that displays the result of drawing, and 12 is a drawing mode selection unit that switches the drawing means from a pencil to an eraser or from an eraser to a pencil. , 13 is a drawing processing unit which changes the display based on the position information obtained by the handwriting input unit and requests the communication control unit 15 to transmit the position information.
The display may be changed based on the position information obtained from 5. 14 is a token management unit that manages the presence or absence of tokens. The communication control unit 15 sends and receives location information and requests/transfers tokens.

Before explaining the overall operation of the drawing communication device, first, the drawing mode selection section 12 and the drawing processing section 13 will be described.
The respective processing procedures of the token management unit 14 and the token management unit 14 will be explained below. Note that in this embodiment, a display-integrated tablet that integrates a liquid crystal flat display and an electronic pen tablet is used as the handwriting input unit and the display unit.

[0013] In the following explanation, the first token at the calling terminal and the second token at the called terminal will be referred to as "self-tokens," and the second token at the calling terminal and the second token at the called terminal will be referred to as "self-tokens." The token numbered 1 is called the "opponent token."

The processing procedure regarding handwriting input by the drawing processing section 13 of the drawing communication device having the above-described configuration will be explained with reference to the flowchart shown in FIG.

First, as will be described later, at the start of communication, each terminal has its own token and starts with a pencil selected as the drawing means. The pen input processing section of the drawing processing section 13 clears the drawing flag (S1) and waits for the pen to be lowered onto the tablet (S2).
When it is detected that the pen has been lowered, the process advances to S3, and after setting the drawing flag, it is checked whether the user has a self-token (S4). If the user does not have a self-token, the process jumps to S7, clears the drawing flag, waits for the pen to be raised (S8), and returns to S2.

[0016] If you have a self-token at S4, S
The process proceeds to step 5, where it is checked whether the selected drawing means is an eraser, and if it is an eraser, the process proceeds to step S6, where it is checked whether the opponent also has a token. If you do not have it, proceed to S7; if you have it, proceed to S9.

[0017] If the pencil is selected in S5, the process also proceeds to S9, where the position of the pen is transmitted to the other party's terminal and the user's own display is changed (S10). The locus of the pen is drawn by repeating S9 and S10 until it is detected in S11 that the pen is raised. When it is detected in S11 that the pen is raised, the process proceeds to S12, and it is checked whether or not the other party's token is held. If so, the process proceeds to S13, where the partner token is transferred to the other party's terminal, and then the process proceeds to S14, where the drawing flag is cleared. do. If the opponent does not have a token in S12, S13 is skipped, the process proceeds to S14, the drawing flag is cleared, and the process returns to S2.

Further, as shown in FIG. 3, the drawing processing unit 13 first waits for a drawing input in S20, and when there is a drawing input, proceeds to S21, changes the display, and returns to S20 again. Processing is in progress.

As is clear from the above description, the drawing processing unit 13 processes all drawing commands from the other party and reflects them on the display, and for drawing operations from its own terminal, it processes the tokens necessary to use the drawing means. Processing will be performed on the coordinate input only if it has , and the drawing flag will remain set during that time. Furthermore, if you use an eraser, return the opponent's token when you finish using it.

Next, the processing procedure of the token management section 14 will be explained with reference to the flowchart of FIG.

First, in S30, a state is set in which the user owns the own token, and in S31, a state is set in which the user does not have the partner's token. Then, in S32, it is checked whether a token request has been received, and if a token request has been received, the process proceeds to S33, where it is checked whether or not the requested token is possessed, and if it is not possessed, it cannot be transferred, so the process returns to S32. If you have it, the process advances to S34, and it is checked whether the drawing flag is set. If the drawing flag is set, the drawing processing unit 13 is in use, so it cannot be transferred, and the process returns to S32. If the drawing flag is not set in S34, the process advances to S35, where the requested token is transferred to the other party's terminal, and in S36, the requested token is set to a state that it does not have it, and the process returns to S32.

[0022] Furthermore, if a token request is not received in S32, the process advances to S37, and it is checked whether a token transfer has been received. If the token has not been received, the process returns to S32; if the token has been received, the process proceeds to S38, and the transferred token is set to be held.

As is clear from the above explanation, when a token is requested, the token management section 14 passes the token to the other party only if it has the token and the drawing processing section 13 is not drawing. , If a token is transferred, the token is held regardless of its internal state.

Next, the processing procedure of the drawing mode selection section 12 will be explained with reference to the flowchart shown in FIG.

First, in S40, the pencil is selected as the drawing means, and in S41, the process waits for switching of the drawing means to be activated. When switching is activated in S41, the process advances to S42, and it is checked whether the newly selected drawing means is an eraser. For eraser, use S43
Proceed to , and check whether you have both your own token and your opponent's token. As a result, if the terminal does not have its own token or the other party's token, the process advances to S44, requests the other party's terminal to transfer the token it does not have, and the process advances to S45. If you have both the own token and the opponent token in S43, skip S44 and proceed to S4.
The process proceeds to step 5, where the eraser is selected as the drawing means, and the process returns to step S41.

[0026] Furthermore, if a pencil is selected in S42, S
Proceed to step 46, check whether you have the other party's token, and if you have, transfer the other party's token to the other party's terminal (
S47), proceed to S48. If you do not have the other party's token in S46, skip S47 and proceed to S48 to check whether you have your own token. If the terminal does not have its own token, the process advances to S49 to request the other party's terminal to transfer its own token, and the process advances to S50. S48
If the user has a self-token, S49 is skipped and the process proceeds to S50, where the pencil is selected as the drawing method, and the process returns to S41.

As is clear from the above explanation, if the drawing mode selection unit 12 does not have the token necessary for the selected drawing means, it requests the token from the other terminal,
If you have more than you need, return it to the other person.

In the above description, each of the drawing processing section 13 (pen input and communication drawing input), token management section 14, and drawing mode selection section 12 will be explained in order to avoid making the flowchart complicated and difficult to understand. Although the process shown in FIG.
By switching the control of the CPU in the device in the drawing command reception check in S20, the token command reception check in S32 and S37 of FIG. 4, and the drawing mode selection check in S41 of FIG. Operate in parallel.

Next, the operation of the entire drawing communication device will be explained separately for each state.

[0030] When a drawing mode change is activated, the possible states of the terminal are: - A pencil is selected and it has a self-token.
Pencil is selected and does not have a self token■
Eraser is selected and you have both your own token and your opponent's token - Eraser is selected and you only have your own token ■ Eraser is selected and you do not have your own token and your opponent's token. If we assume that the state in which the selected drawing method (pencil or eraser) has the necessary token is called "available" and the other states are called "selected," then the states of both terminals during communication are possible. The following combinations are: Combination 1) ■-■: Both parties can use pencils Combination 2) ■
-■: One side can use a pencil/The other side selects an eraser Combination 3) ■-■: One side can use an eraser/The other side selects a pencil Combination 4) ■-■: One side can use an eraser/The other side also Eraser selection combination 5) ■-■: There are five possible combinations in which both parties select an eraser.

[0031] As for the operating environment of the terminal, a display-integrated tablet is used to input and output drawings, and a part of the display-integrated tablet is used to select the drawing mode, and a pencil icon and an eraser icon are displayed. The user selects the icon by touching the icon with a pen. And when the icon is selected, the display changes,
It is assumed that it is possible to determine whether the pencil or the eraser is selected. In this way, since drawing and mode selection are performed with the same pen, it is impossible to change the drawing mode while drawing (while the pen is down). In the cases of ■, ■, and ■ mentioned above, the user does not have the token necessary for the selected drawing method, so no drawing is performed even if the pen is lowered onto the tablet. Therefore, the user will have to poke the selected icon several times with a pen to obtain a token.

[0032] Regarding communication, changes in the drawing mode are not notified to the other party's terminal, so when notifying pen position information, information indicating whether the drawing method is a pencil or an eraser is also added to the position information. transmitted.

In the case of combination 1) above, both terminals are capable of drawing with a pencil. Therefore, selecting a pencil in this state is a meaningless operation, but if a pencil is selected, S41-S42-S46-S48-
The process passes through S50 and no special processing is performed. Also,
When the pen is lowered in this state, S2-S3-S in Figure 2
4-S5-S9-S10-S11 (-S9-S10-S
(repetition of step 11)--While the pen is lowered through the path S12-S14, writing on the display and transmission of the pen position to the other party's terminal are performed, and the drawing flag remains set.

Furthermore, the pen position sent to the other party's terminal in S9 of FIG. 2 is given as a communication drawing input to the other party's terminal, and is processed and displayed in S20-S21 of FIG. Also, in this state, if you select the eraser, S41-S42 in Figure 5
- Pass through the path S43-S44-S45 and request a partner token from the partner terminal. The token management unit of the other party terminal that receives this passes through the path S32-S33-S34 in FIG. transition to state.

If drawing is not in progress, at the requested S35,
Transfer your own token. The token management unit of the terminal that received this and selected the eraser is S32-S37-S in Figure 4.
38 passes, the state moves to the state where both the own token and the opponent token are acquired, that is, the state of combination 3) described above, and the eraser can be used.

In the case of combination 2), the operation when a pencil is selected or the pen is put down on a terminal that can use a pencil is the same as in combination 1). The process when the eraser is selected is the same, except that the transition state changes from combination 2) to combination 5) and from combination 3) to combination 4).

On the other hand, when the eraser is selected on the terminal where the eraser is selected, S41-S42-S43-S in FIG.
44-S45, and requests the other party's token from the other party's terminal. The token management section of the other party's terminal receives this,
It passes through the path S32-S33-S34 in FIG. 4, and in S34 it is determined whether or not drawing is in progress, and if drawing is in progress, the token request is ignored. In this state, when the pen is lowered on the terminal with the eraser selected, S2-S3-S4-S5-S6-S in Figure 2
7-S8 path is passed and drawing cannot be performed.

At S34 in FIG. 4, if drawing is not in progress, the requested self-token is transferred. The token management section of the terminal that received this and selected the eraser is S32-S37-S
38 passes, the user enters a state in which both the own token and the opponent's token have been acquired (combination 3), and the eraser can be used. Further, when a pencil is selected, the path S41-S42-S46-S48-S50 in FIG. 5 is passed, and the state shifts to combination 1), and both pencils can be used.

In the case of combination 3), when the eraser is selected on a terminal that can use the eraser, S41-S42 in FIG.
The path -S43-S45 is passed and no special processing is performed. Also, when you lower the pen, S2-S3-S4- in Figure 2
S5-S6-S9-S10-S11 (-S9-S10-
While the pen is lowered through the path S11)-S12-S13-S14, writing is performed on the display and the pen position is sent to the other party's terminal, and the drawing flag remains set. , the other party's token is transferred when the pen is raised (S13).

[0040] Furthermore, the other party's terminal that received this is S in FIG.
20-The display is updated in S21, and the display is updated in S32-S37- of FIG.
In S38, the state becomes such that the self-token has been acquired. As a result, the state of the terminal shifts to combination 2). Also, if you select a pencil on a terminal that can use an eraser, S41-
The process passes through a path of S42-S46-S47-S48-S50, and transfers the partner token to the partner terminal in S47. The partner terminal that receives this acquires its own token through the path of S32-S37-S38 in FIG. 4, and shifts to a state in which both parties can use pencils (combination 1).

On the other hand, if you select a pencil on the terminal that is selecting the pencil, S41-S42-S46-S48-S in FIG.
49-S50, requests a self-token, and receives the request, a terminal that can use the eraser will pass S3 in Figure 4.
2-S33-S34, and in S34 it is determined whether or not drawing is in progress, and if drawing is in progress, the token request is ignored. In this state, when the pen is lowered on the terminal where the pencil is selected,
The path S2-S3-S4-S7-S8 in FIG. 2 is passed and drawing cannot be performed.

At S34 in FIG. 4, if drawing is not in progress, the requested self-token is transferred. The token management unit of the terminal that has received this and selected the pencil performs steps S32-S37-S38.
The state in which the self-token was acquired through the path (combination 2)
), and the pencil can be used. Also,
When you select the eraser, S41-S42-S43 in Figure 5
- Pass through the path S44-S45 and request both the own token and the other party's token from the other party's terminal. On terminals that can use the eraser that received this, S32-S33-S3 in Figure 4
4, it is determined in S34 whether or not drawing is in progress, and if drawing is in progress, the token request is ignored and the state shifts to combination 4). If drawing is not in progress, transfer the requested self token and partner token.

[0043] Upon receiving this, the token management unit of the terminal that selected the pencil passes through the path S32-S37-S38 in FIG. , the eraser can be used.

In the case of combination 4), the operation on a terminal capable of using an eraser is the same as in combination 3). However, combination 2) changes to combination 5), and combination 1) changes to combination 2). On the other hand, if you select the eraser on the terminal that has the eraser selected, S41-S42-S43-S44-S in Figure 5
45 path and requests the other party's token from the other party's terminal. The token management section of the other party's terminal that received this sends the S
32-S33-S34, and in S34 it is determined whether or not drawing is in progress, and if drawing is in progress, the token request is ignored. In this state, if the pen is lowered on the terminal with the eraser selected, the pen passes through the path S2-S3-S4-S7-S8 in FIG. 2, and no drawing can be performed. In S34 of FIG. 4, if drawing is not in progress, the requested own token and partner token are transferred.

[0045] Upon receipt of this, the token management unit of the terminal that selected the eraser passes through the path S32-S37-S38 and shifts to the state (combination 4) in which both the own token and the partner token have been acquired (combination 4). (The device that can use the eraser and the selected device are swapped), and the eraser can be used. Furthermore, if a pencil is selected, the same process as combination 3) is executed.

In the case of combination 5), when the eraser is selected, a request for the other party's token is issued through the path S41-S42-S43-S44-S45 in FIG. The other party terminal that received this is S32-S33-S34-S35-S in Figure 4.
Pass through 36 paths and transfer your own token. The activation terminal that receives this passes through the path S32-S37-S38 in FIG. 4, and enters a state in which the eraser can be used (combination 4). The process when the pen is put down in the state of combination 5) is ignored, as is the operation of the terminal selecting the eraser in combination 4).

[0047] In the above explanation, the case where there are two communication terminals has been described for simplicity, but the same processing can be performed even when there are a large number of communication terminals.

[0048]

[Effects of the Invention] As explained above, in the drawing means control method of the drawing communication device of the present invention, tokens are prepared according to the number of terminals, and if you have one token, you can use the writing type drawing means. On the other hand, since it is configured so that the erasable drawing method is possible only when you have all the tokens, there is no situation where you use a pencil and an eraser at the same time, and only the pencil can be used at the same time. Therefore, there is no difference in the display, and there is an effect that the operability of frequently used pencils is not impaired.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a drawing communication device of the present invention.

FIG. 2 is a flowchart illustrating the flow of pen input processing in a drawing processing section.

FIG. 3 is a flowchart illustrating the flow of communication drawing input processing by the drawing processing unit.

FIG. 4 is a flowchart illustrating the flow of processing by a token management unit.

FIG. 5 is a flowchart illustrating the flow of processing by a drawing mode selection unit.

FIG. 6 is an explanatory diagram of a display on a conventional terminal when writing and erasing are performed simultaneously.

[Explanation of symbols]

10 Handwriting input unit 11 Display unit 12 Drawing mode selection section 13 Drawing processing section 14 Token management department 15 Communication control section

Claims (1)

[Claims] 1. In a drawing means control method for a drawing communication device constituted by a plurality of terminals each having a writing type and an erasing type drawing means, a terminal for controlling input to the drawing means of each terminal. It is equipped with tokens provided according to the number of tokens, and enables input to a write-type drawing means of a terminal that holds at least one of the tokens, and enables an input of a write-type drawing means of a terminal that holds all of the above-mentioned tokens. A drawing means control method for a drawing communication device, characterized in that drawing means can be input.