JPS62115578A - Graphic display device - Google Patents

Abstract

PURPOSE:To simply move and copy a graphic drawn on a screen by storing the maximum value and minimum value of a graphic on a coordinate, obtaining an area from the maximum value and the minimum value only be designating a part of the graphic and displaying them in a frame. CONSTITUTION:The picture tracking key 2 of a key input part 1 is operated, a 'picture drawing' mode is designated, and a desired graphic is formed. The function and the coordinate set at this time are registered in a procedure memory 24. From the set coordinate, the coordinates of the respective points to be drawn are calculated and written. At the time of moving the graphic, moving key 12 is operated, a 'moving' mode is designated, the position of one point of the graphic desired to be moved is designated and a set key is operated. The CPU 21 searches the graphic accommodated in the range of the maximum value and the minimum value from the procedure memory 24. When the CPU 21 detects the designated graphic, it encloses the graphic by frame cursor displays. When the operator moves the frame cursor to a desired position, the coordinate of the graphic is rewritten and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to an eight-position graphic display that facilitates the movement or copying of figures drawn on a screen.

[Prior art and its problems] In a graphic display device, for example, as shown in Figure 8 (1), a figure <8) is displayed on the screen, and in order to move it, conventionally, As shown in 2), if you specify a certain point (for example (A)) with the cursor, ■ Specify a point on the diagonal of that point (B) with the cursor, ■ A frame cursor (x) whose size can change freely will be displayed. Ru.

■Next, move the frame cursor (Figure 8 (3)) ■ Press the movement key ■ The figure moves (Figure 8 (4)).

This operation is necessary. In addition, in the case of copying, the copy key is operated instead of the movement key.

As described above, in the past, when moving or copying a figure displayed on a screen, the operation was very troublesome.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide a graphic display device that allows a figure drawn on the screen to be moved or copied with a very simple operation. purpose.

U Points of the Invention] When drawing a figure on the screen, the present invention memorizes the maximum and minimum coordinate values of the figure, and later, by simply specifying a part of the figure, the memory maximum The area is determined from the value and the minimum value and displayed in a frame, and the corresponding procedure data in the procedure memory is rewritten in accordance with the movement operation of this frame display.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a graphic display device. In the figure, 1 is the key manual section, and the drawing key 2
, a mode setting key consisting of a setting key 3, an execution key 4, a function key consisting of a dot key 5, a line key 6, a circle key 7, a square key 8, a separator key 9, a set key 10, an end key 11, a movement key 12, It is provided with keys such as a copy key 13, a frame key 14, and a cursor key 15, as well as numeric keys, alphabet keys, etc. (not shown). The cursor keys 15 are located around the frame key 14 and consist of eight keys that respectively designate the up, down, left and right directions, and the upper right, lower right, lower left, and upper left directions. The data input from the key human power section 1 is as follows:
It is sent to c p U 21. Connected to this CPU 21 are a control ROM 22 that stores various control commands, a work RAM 23, a procedure memory 24 that stores the maximum and minimum values of each graphic coordinate as well as display procedures for created graphics, and a display control circuit 25. Ru. This display control circuit 25 is a CPU
The display data sent from 21 is written into a VRAM (video memory) 26, and the data stored in this VRAM 26 is displayed on the CR1 display section 21.

Next, the operation of the above embodiment will be explained according to flowchart 1.

First, the drawing key 2 in the key operator section 1 is operated to designate the "drawing" mode, and a desired figure as shown in FIG. 6, for example, is created according to the drawing flow shown in FIG. When creating a figure, first, function settings are performed in step A1 of FIG.

Dot key 5, line key 6, circle key 7 in key human power section 1,
The square key 8 is the Tono key, and these keys allow you to
Set any function such as "point", "line", "circle", "square", etc. Next, in step A2, coordinates are set using the cursor key 15 and the set key 10. The settings in steps AI and A2 above are, for example, point → "point J (Xi , Yl) r set" line → [line J
(Xl, Yl) l'-set J(X2
, Y2 ) r set" Circle → [Circle J (Xl, Yi) r set"<X2 , Y2 ) r set" Square → "Square J (Xl, Yl) r set" (X2.Y2
) r set”. In this case, if it is a line, specify the coordinates of the start and end points, if it is a circle, specify the center and the coordinates of a point on the arc, and if it is a square, specify the coordinates of the diagonal. The functions and coordinates set as above are set in step A.
3, it is registered in the procedure memory 24 by the CPU 21. This procedure memory 24 consists of a command area 24a and a data area 24b as shown in FIG. Coordinate data for the above command is registered in area 24b. Next, the calculation process shown in step A4 is executed. The above step A4 is A41, A42
, A43, and step A
In 4+, the coordinates of each point to be drawn are calculated from the coordinates set as described above, and stored in the VRAM 26 in step A42. For example, if it is a circle, the radius can be found from two points, and the coordinates of the circumference can be calculated from the circle equation.

Then, calculate the coordinates of one dot (step A for each step).
XMAX, XMIN, YMAX, YMIN in 33
is determined and its update processing is performed. Figure 5 (1) to (3)
is XMAXN XMI for circles, triangles, and quadrilaterals
This shows the (columns of N, YMAX, YMIN).In step A4 above, the coordinates are written to the VRAM 2G while calculating, so step A4
Processes 1 to A43 are repeated many times.

After setting data for one graphic as described above, if you wish to separate the data from the next set graphic, operate the delimiter key 9. Whether or not the key 9 for this ward has been operated is determined in step A5. If the separator key 9 was operated, proceed from step A5 to step 80,
As shown in FIG. 3, the command area 2 of the procedure memory 24
At the same time as registering the delimiter command in 4a, data area 2
4b, XMAXN YMA obtained in step A43 above.
Register X, XMIN%YMI~. After setting the above shape,
Alternatively, after operating the separator key 9, if you want to register a figure and register a figure with the same function, do not operate the function keys 5 to 8, and proceed with the coordinate setting operation.
When changing a function, the coordinate setting operation is performed immediately after changing the function using function keys 5 to 8.

If the process in step 80 is completed, or if it is determined in step A5 that the separator key 9 has not been operated, the process proceeds to step A7 and the end key 11 is pressed.
Determine whether or not the has been operated. If the end key 11 has not been operated, the process proceeds to step 88, where it is determined whether or not to change the function, that is, whether or not the function keys 5 to 8 have been operated.If the function is not to be changed, the process proceeds to step A2. If the function is to be changed, return to step A1. Thereafter, by sequentially setting arbitrary figures in the same manner, their reference coordinates and XMAX s YMAX , XM I N, YMI
N is registered in the procedure memory 24 shown in FIG. 3, and the drawing coordinates are registered in the VRAM 2B. Then, to end the above drawing operation, the end key 11 is operated. This operation of the end key 11 is detected in step A7, thereby ending the processing of the drawing flow.

Next, the operation when moving the figure drawn as described above will be explained. To move a figure, operate the movement key 12 to specify the ``move vJj mode.'' When this ``move'' mode is specified, the movement flow shown in FIG. 4 is executed. When moving a figure, after specifying the "move" mode as described above, first, in step B1, as shown in FIG. designation, and then operate the set key 10 in step B2. When the above key operation is performed, the CPU 21 selects the coordinates of the designated point (A) from the procedure memory 24 as shown in step B3.
Search for a figure that falls within the ranges of ≦X≦XMAXJ, rYM+N≦Y≦YMAXJ.

When the CPU 21 detects the specified figure, it proceeds to step B4, displays the figure (a) surrounded by a rectangular frame cursor 31, as shown in Figure 6 (2), and displays the figure (a) in step B5 as to whether it is OK or not. Ask the operator. N
In the case of o, the process returns to step B3 and searches for another figure from the procedure memory 24 again.

If it is OK, the operator moves to the sixth step in step B6.
Move the frame cursor 31 to a desired position as shown in FIG. 3 (3). That is, when the cursor key 15 is operated while pressing the frame key 14, the frame cursor 31 moves in the direction indicated by the cursor key 15.

After moving this frame cursor 31 to a desired position, the set key 10 is operated as shown in step B1. When the above key operation is performed, the process proceeds to step B8, where the CPU 21 converts the coordinates of the specified figure in the procedure memory 24 to the coordinates of the moved position as shown in FIG. 6(4). At this point, VRAIv12
The contents of 6 are not rewritten and the display screen does not change. This completes the movement process.

In this case, since only the contents of the designated figure in the procedure memory 24 are rewritten, only the designated figure can be moved even if two figures overlap.

Also, if you want to copy a figure drawn on the screen, operate the copy key 13 instead of the movement key 12 to specify the "copy" mode, and perform the same operation as in the case of movement. The graphic procedure of the copy position is recorded in the procedure memory 24.

This completes the graphic creation, and then the execution key 4 is operated to execute the graphic reproduction operation. By operating the execution key 4, the execution flow shown in FIG. 7 is executed. First, in step C1, the first command is read out from the procedure memory 24 to the CPIJ 21, and in step C2
It is determined whether the code is a delimiter code or not as shown in . c.
If it is determined that p U 21 is not a delimiter code, the process proceeds to step C3 to perform drawing processing. That is,
The CPU 21 first reads the reference coordinate data corresponding to the above command from the procedure memory 24, calculates the coordinates of each point to be drawn, writes it to the VRAM 26 via the display control circuit 25, and displays the coordinate data on the CRT display section 27. After that, the process proceeds to step C4. If it is determined in step C2 that the code is not a delimiter code, the process in step C4 is immediately executed. In this step C4,
It is determined whether all commands have been read from the procedure memory 24, and if not, the process returns to step C1. Thereafter, the same process is repeated, and the coordinates of each point to be drawn from the reference m mark read from the procedure memory 24 are obtained using a meter, written to the VRAM 26 via the display control circuit 25, and displayed on the CRT display section 27. . And procedure memory 2
When all the commands stored in C4 are read out, the state is detected in step C4, and the processing of the execution flow ends. In the above execution flow, drawing coordinates are determined based on the reference coordinates stored in the procedure memory 24, and
26 and displayed on the CRT display section 21, the 6th
As shown in Figure (4), the figure whose movement processing has been completed is displayed.

[Effects of the Invention] As detailed above, according to the present invention, in a graphic display device, when a figure is drawn on the screen, the maximum value and the minimum value on the coordinates of the figure are stored, and later, After specifying a part of the shape, use [B] to find the area from the maximum and minimum values stored and display it as a frame, and according to the movement operation of this frame display, the corresponding procedure data in the above procedure memory will be rewritten. , it is possible to move or copy figures drawn on the screen with very simple operations.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention,
FIG. 1 is a block diagram showing the circuit configuration, FIG. 2 is a flow chart showing the drawing operation, FIG. 3 is a diagram showing the storage structure of the procedure memory, FIG. 4 is a flow chart showing the moving operation, and FIG. 1) to (3) are diagrams for explaining the operation of detecting the maximum and minimum values of a figure, Figures 6 (1) to (4) are diagrams for explaining the movement of a figure, and Figure 7 is a diagram for explaining the movement of a figure. 8 is a flowchart showing the display execution operation, and FIGS. 8(1) to 8(4) are diagrams for explaining the figure transfer #J operation in a conventional graphic display device. 1...Key human power department, 13...Cursor key, 21.
...CPU, 22...Control ROM, 23...Work RAM. 24...Procedure memory, 25...Display control circuit, 2G
...VRAM, 27...CRT display section. Applicant's agent Patent attorney Suzue Takehiko J70- Figure 2 Figure 3 Figure 4 Figure 6 Execution flow Figure 7 Figure 8

Claims (1)

[Claims] A figure creation means for creating a figure on a screen, a means for determining the maximum and minimum values in the coordinates of the figure when the figure is created by this means, and the maximum and minimum values of the figure coordinates determined by the above means. A procedure memory that sequentially stores the data along with the procedure data for that figure, and when a part of the figure displayed on the screen is specified, the maximum and minimum values of the specified figure are read from the procedure memory to determine the area of the specified figure. 1. A graphic display device comprising: a means for determining a figure; and a means for rewriting procedure data of a corresponding figure in the procedure memory in accordance with a moving operation of a figure indicated by the area.