JPS62115586A - Graphic display device - Google Patents

Abstract

PURPOSE:To move dot pattern data of an area by storing a maximum value and a minimum value on the coordinate of a graphic, designating a part of the graphic and obtaining the area of the memory maximum value and the minimum value. CONSTITUTION:The drawing key 2 of the key input part 1 is operated, drawing mode is designated, a desired graphic is formed, the maximum value and the minimum value of the coordinate of the graphic are calculated and registered in a procedure memory 24. When moving the graphic, a moving key 12 is operat ed, a moving mode is designated, the position of one point of the graphic desired to be moved is designated and a set key 10 is operated. A CPU 21 searches the graphic in which the coordinate of a designating point from the procedure memory 24 is accommodated in a range of the maximum value - the minimum value. When the CPU 21 detects the designated graphic, it encloses the graphic by a square cursor and displays. An operator moves the frame cursor to a desired position and operates the set key 10, and then the CPU 21 moves the designated graphic to the frame cursor by a bit map.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a graphic display device that facilitates movement or copying of figures drawn on a screen.

[Conventional removal techniques and their problems] In a graphic display device, for example, as shown in Figure 8 (1), a figure (a) is displayed on the screen, and in order to move it, conventionally, (2) If you specify a certain point (for example (A)) with the cursor, and then specify the diagonal point (A) with the cursor, ■ a frame cursor whose size can change freely will be displayed. be done.

■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.

[Summary 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 stored maximum The area is determined from the value and the minimum value, and the dot pattern data of that area can be moved.

[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 same figure, 1 is a key input section, and drawing key 2
, setting key 3, execution key 4, dot key 5, line key 6, circle key 7, square key 8, separator key 〇, set key 10, end key 11, movement key 12, copy key 13, frame key 14
, a cursor key 15, and other keys (not shown) such as numerical keys and alphabet keys.

The cursor keys 15 are located around the frame key 14, and are arranged in the up, down, left and right directions, as well as in the upper right, lower right, lower left,
It consists of eight keys that each specify the upper left direction. Data input from the key input section 1 is sent to the CPU 21. This CPU 21 has a till lOR0M2 which stores various control commands.
2. Work RAM 23, procedure memory 24, and display control circuit 25 are connected. 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 2B is displayed on a CRT display section 27.

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

First, a drawing mode is designated by operating the drawing key 2 in the key input section 1, 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. The dot key 5, line key 6, circle key 7, and square key 8 in the key input section 1 are function keys, and these keys can be used to select arbitrary values such as "dot", "line", "circle", "square", etc. Configure functions. Next, in step A2, coordinates are set using the cursor key 15 and the set key 10. The settings in steps A1 and A2 above are, for example, point → "point 1 +, Y1) r set" line -, (Xl
, Yl) r set" (X2 , Y2 > r set" Circle → "Circle J (Xl, Yl) r set" (X2 , Y2 ) r set" Square → "Square J (Xl, Y11 r set") (X2 , Y
2) Do the 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 stored in the CPU 21
is registered in the procedure memory 24. This procedure memory 2
4 consists of a command area 24a and a data area 24b as shown in FIG.
Commands such as "point,""line,""circle," and "square" are registered in the data area 24b, and coordinate data for the above commands is registered in the data area 24b. Next, the calculation process shown in step A3 is executed. The above step A3 includes A3r, A32,
Consists of three processing steps A33, step A31
Then, calculate the coordinates of each point to be drawn from the coordinates set as above, and in step A32
Write to AM26. 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, each time the coordinates of one dot are calculated, XMAX, XMIN, YMAX% YMIN are determined and updated in step A33. Figure 5 (1) to (3) are
For circles, triangles, and squares, XMAXN XMIN%
Examples of YMAX and YMIIN are shown. Then, in step A3 above, the coordinates are written into the VRAM 26 while being calculated, so step A3+
The processes from ~A33 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 delimiter key 9 has been operated is determined in step A4. If the separator key 9 is operated, proceed from step A4 to step A5,
As shown in FIG. 3, the command area 2 of the procedure memory 24
At the same time as registering the delimiter command in the data area 24b, the Xl4AX, YM obtained in step A33 above
Register AX, XMIN, YMIN. After setting the figure above or operating separator key 9, if you want to register a figure with the same function, do not operate function keys 5 to 8 and continue with the setting operation. , When changing the function, change the function using function keys 5 to 8, and then perform the coordinate setting operation.

Therefore, if the processing in step A5 is completed, or if it is determined in step A4 that the delimiter key 9 has not been operated, the process proceeds to step 80 to determine whether or not the end key month has been operated. . If the end key 11 has not been operated, the process proceeds to step A7 to determine whether or not to change the function, that is, whether or not function keys 5 to 8 have been operated, and if the function is not to be changed, the process returns to step A2. , to change the function, return to step A1. Thereafter, by sequentially setting arbitrary figures in the same manner, their reference coordinates and XMAX s YMAX s XM I N %YM
IN is registered in the procedure memory 24 shown in FIG. 3, and drawing coordinates are registered in the VRAM 2G. Then, to end the above drawing operation, the end key 11 is operated. This operation of the end key 11 is detected in step 80, thereby ending the processing of the drawing flow.

Next, the operation when moving the figure drawn as described above will be explained. To move the figure, operate the move key 12 to specify the "move" mode. When this "move" mode is designated, the move 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.
For example, the position (A) is designated, and then the set key 10 is operated in step B2. When the above key operation is performed, the CP tJ 21 retrieves 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 range of IN≦X≦XMAXJ, rYx+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 FIG. Ask the operator. This is because the specified coordinates may fall within multiple figures. If No, the process returns to step B3 and searches for another figure from the procedure memory 24 again. OK
If so, the operator performs the process shown in FIG. 6 (
3) Move the frame cursor 31 to the desired position. 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. And this frame cursor 3
1 to the desired position, then operate the set key 10 as shown in block B7. When the above key operation is performed, the process advances to step B8, and the CP tJ 21 moves the specified figure (a>) to the frame cursor 31 using the bitmap. Since the dots move, even if the figures overlap, they move together.Then, in step B9, the result of the figure movement is displayed on the CRT display unit 21 as shown in FIG. 6(4). End the move process.

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 copy process in the same way as for movement. be able to.

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 CPU 21, and as shown in step C2, it is determined whether or not it is a delimiter code. C.P.
If U21 determines that the code is not a delimiter code, it proceeds to step C3 and performs drawing processing. That is, c
The p U 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, and then outputs the V via the display control circuit 25.
1 is loaded into the RAM 26 and displayed on the CRT display section 27, and then the process advances to step C4. Furthermore, if it is determined in step C2 that the code is a delimiter code, the process in step C4 is immediately executed.

In this step C4, it is determined whether all the commands have been read out from the procedure memory 24. If not, the process returns to step C1. Thereafter, the same process is repeated, and the coordinates of each point to be drawn are calculated from the reference coordinates read from the procedure memory 24, written into the VRAM 2G via the display control circuit 25, and displayed on the CRT display section 27. Then, when all the commands stored in the procedure memory 24 are read out, the state is detected in step C4 and the processing of the execution flow is ended.

[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, By simply specifying a part of the shape, the area can be calculated from the maximum and minimum values stored, and the dot pattern data in that area can be moved, making it very easy to move or copy the shape drawn on the screen. This can be done with 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 flowchart showing the drawing operation, FIG. 3 is a diagram showing the first configuration of the procedure memory, FIG. 4 is a flowchart showing the moving operation, and FIG. ) 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 operation of a figure, and Figure 7 is a display. Flowcharts illustrating execution operations, FIGS. 8(1) to 8(4) are diagrams for explaining figure moving operations in a conventional graphic display device. 1...Key input section, 13...Cursor key, 21.
...CPU, 22...System (IIROM, 23...Work RA~1.24...Procedure memory, 25...Display control circuit, 26...VRAM,' 27...C
RT display section. (Illustrated by Takehiko Suzue, Patent Attorney)

Claims (1)

[Claims] A figure creation means for creating a figure on a screen; a means for determining the maximum and minimum values on the coordinates of the figure when the figure is created by this means; A procedure memory that stores the information in correspondence with the
means for determining the area of the designated shape by reading the maximum and minimum values of the designated shape from the above-mentioned procedure memory when a part of the shape displayed on the screen is designated; and a dot pattern within the area determined by this means. 1. A graphic display device comprising means for moving data according to key input instructions.