JPH0522933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a display control method applicable to character processing devices that create and edit documents.

[Prior Art] In conventionally known character processing devices, line spacing values are set in advance for all documents, and the number of lines included in one page is determined depending on the paper size. .

In addition, in character processing devices where the line spacing value can be set for each line, even if the line spacing value is changed,
Due to the fact that the number of lines included in one page is fixed for the entire document, there were drawbacks such as the bottom of the paper being printed blank.

[Objective] An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a display control method that can display patterns indicating page breaks even when multiple types of line spacing information are specified.

In order to achieve the above object, in the display method according to the present invention, the first
and second line spacing information different from the first line spacing information, and based on the first line spacing information and the second line spacing information, the line spacing information of the plurality of character lines is When displaying, based on the first line spacing information and the second line spacing information,
The display is controlled to display a pattern indicating page breaks that allows the number of character lines that fit on one page to be identified.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a character processing device to which the present invention is applied. That is, in order to control the indication of the line spacing value and the display of the frame by a microprocessor, this embodiment includes the following components.

2: Key input means, 4: Line spacing changing means for changing the line spacing value, 6: Document storage means for storing the line spacing value and the number of character strings, 8: Display data creation means for converting the contents of the document storage means 6 into a display format. , 10: Display storage means for storing display data, 12: Displaying the contents stored in the display storage means 10.
Display control means for displaying on CRT14.

In this embodiment having such a configuration, the line spacing instruction value input from the key input means 2 is stored in the document storage means 6.
By storing the data in the page, display data with a page frame is formed, and the data is displayed on the CRT 14.

FIG. 2 is a block diagram showing another embodiment of the invention. In the illustrated configuration, the CPU is a microprocessor that performs operations for character processing,
It makes logical decisions and controls each component connected to the bus BUS, which will be described later.

BUS is a common bus and is used for instructions, control, and data transfer for devices connected to this bus.

The ROM is a read-only fixed memory in which procedures for control by the microprocessor CPU, ie, procedures such as those shown in FIGS. 10 and 11, are stored.

RAM is random access memory,
Used to temporarily store various data from each component.

DBUF is a document memory that stores line spacing values, character strings, etc. input from the keyboard KB, which will be described later.

VRAM is display memory and document memory
Stores display data in a format with page frames added to the document data stored in DBUF.

The KB is a keyboard, and is equipped with various function keys such as alphanumeric keys, hiragana keys, katakana keys, and cursor keys for instructing various functions to this character processing device.

The CRTC is a CRT controller and is responsible for displaying the contents stored in the display memory VRAM on the display CRT. Here, the CRT is a display device using a cathode ray tube or the like, and a dot-configured display pattern and cursor display on this display device CRT are controlled by a CRT controller.

CG is a character generator, which generates character signals such as characters, symbols, page frames, etc. to be displayed on the CRT display.

The character processing device made up of each of these components starts operating in response to various inputs from the keyboard KB. That is, when input from the keyboard KB is supplied, an interrupt signal is first sent to the microprocessor CPU, and the microprocessor
The processor CPU reads various control signals stored in the ROM, and various controls are performed according to these control signals.

FIG. 3 shows the positional relationship of the document memory DBUF. The document memory DBUF consists of 14 rows and 10 columns, and the first character of each row represents the line spacing value, ranging from 0 to 9.
or space 〓. Here, a line spacing value of "0" indicates that the next line is displayed overlappingly, and a line spacing value of "1" indicates that there is a gap of one line from the next line. Similarly, for "2" to "9", it is shown that there is an interval corresponding to the number of lines. Also, if there is a space 〓, the line spacing specification value is considered to be the same as the previous line.

FIG. 4 shows the positional relationship of the display memory VRAM. The display memory VRAM consists of 12 rows and 12 columns, and stores display data with page frames attached to the document memory DBUF. The beginning and end of each line are used as page borders, and one line each is used for the start and end of a page, if necessary. Regarding the display, it will be displayed on the CRT with the same positional relationship.

FIG. 5 shows a pattern for displaying page frames. That is, a page frame is configured by a total of six code combinations. These patterns, like other characters, are stored in the character generator CG and are stored in the display memory.
By storing it in VRAM, it is displayed on the CRT under the control of the CRTC.

FIG. 6 is an initial state diagram of the document memory DBUF according to this embodiment, and FIG. 7 is a diagram showing the document memory DBUF in its initial state displayed on a CRT. In this embodiment, the display memory is configured with 12 rows and 12 columns, and one page has a size of 10 rows.

FIG. 8 is a diagram when the line spacing values are all set to 2 for the fourth and subsequent lines. The document memory DBUF in the state shown in this figure is in the seventh state as shown in FIG.
Since the line spacing up to the 7th line is the line spacing value for 10 lines, the frame at the end of the page is displayed after the 7th line. Note that CR shown in FIGS. 7 and 9 is a cursor.

FIG. 10 is a main flowchart showing the control procedure of this embodiment, and FIG. 11 is a detailed flowchart showing the display method. The control procedure for displaying a page frame will be described in detail below with reference to these flowcharts FIGS. 10 and 11.

In the processing flowchart shown in FIG. 10, when the power is turned on, step S1 is first executed. And document memory DBUF, display memory
Initial settings of VRAM and each component are performed,
Input editing, etc. becomes possible. In this embodiment, processing such as input editing can be realized using known techniques, so detailed explanation will be omitted here.
Note that in the initial state of this embodiment, it is assumed that the line spacing value and the number of character strings are input to the document memory DBUF as shown in FIG.

In step S2, a key input is performed, and then in step S3, it is determined whether or not the line spacing is to be changed. That is, if the cursor is at the first character and the keyed-in code is either 0 to 9 or a space, step S4
and execute line spacing change in S6. In step S4 described above, the value input by key in the first digit of the line indicated by the cursor CR in the document memory DBUF is stored as the line spacing specification value. Then step S6
By re-displaying the screen, the size of the frame is changed as shown in FIG.

In other cases, processing such as input editing is executed in step S5.

Next, the contents of step S6 will be explained in detail according to the detailed flowchart shown in FIG. In this example, one page is assumed to have the size of 10 lines, and when the line spacing is all 1, the page frame and
A 10-line display is possible on the CRT.

In step S10 shown in FIG. 11, the CRT is erased. This is done by setting the display memory VRAM to all spaces.

Next, step S11 is executed. Here, processing is performed using the internal registers of the microprocessor CPU. That is, register N holds the line number of document memory DBUF and display memory VRAM.
Points to the row that should be stored. Register P holds the storage precedence number in the display memory, and is incremented by 1 each time the leading frame, character display for one line, and page end frame are written to the display memory VRAM. Register L is used to accumulate the line spacing value and to display the end-of-page frame if the value exceeds 10. Here, each register is set to 1.

In the next step S12, the page top frame is stored in the display memory VRAM by combining page frame codes 1, 2, and 3 shown in FIG.

In step S13, 1 is added to the storage preceding number register P in the display memory VRAM. If it is determined in step S14 that the value of register P exceeds 12, the number of lines that can be displayed on the CRT will be exceeded, so the display process is terminated.

In this embodiment, the paper size is 10 lines, so the register L that holds the cumulative value of line spacing is 10 lines long.
(step S15), the step
Run S19 or later.

If the value of register L is within 10, the step
In S16, page frame code number 4 shown in the fifth diagram
are added to the beginning and end of the document to save the document memory.
The character string of the line indicated by the register N indicating the line number of the DBUF and this page frame code are combined and stored in the register P indicating the storage location of the display memory VRAM.

Furthermore, in step S17, the line spacing value indicated in that line is added to the line spacing value accumulation register L. At this time, if the content of the line spacing value is a space, the search is performed sequentially toward the previous line, and when a value between 0 and 9 is detected, that value is added. Also,
If 0 to 9 cannot be detected, add 1 as a standard value.

In step S18, 1 is added to register N, and the next position to be displayed is updated.

Next, if it is determined in step S15 that the line spacing value accumulation register L exceeds 10, control is transferred to step S19.

In step S19, a page end frame code is stored in the line indicated by the display memory storage destination register P based on the combination of page frame codes 2, 5, and 6 shown in FIG. Thereafter, in step S20, 1 is added to register P, and when the number of displayable lines exceeds 12 (step S21), the display process is terminated.

In step S22, the line spacing value accumulation register L is set to 1.
to continue displaying as the next page.

In this way, page breaks will be displayed.

In addition, in the above-mentioned embodiment, the code refresh method is adopted as the display method.
The bit map method can also be easily realized by changing the control program.

Further, in the above-described embodiment, the display data is created using a control program, but the control program can be made unnecessary by using a highly functional CRTC that can directly display the document memory DBUF.

Note that the present invention may be applied to a system composed of a plurality of devices, or may be applied to a device composed of one device. Furthermore, it goes without saying that the present invention can also be applied to cases where the present invention is achieved by supplying a program to a system or device.

[Effect] As explained above, according to the present invention, by holding a plurality of line spacing information and combining these line spacings, it is possible to change the number of character lines that can fit on one page of a desired size. Also, by displaying a pattern indicating page divisions, the user can easily recognize how many lines of text can fit on one desired page.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention;
2 is a block diagram showing another embodiment of the present invention, FIG. 3 is a layout diagram of the document memory DBUF, FIG. 4 is a layout diagram of the display memory VRAM, and FIG. 5 is a pattern diagram for displaying an image frame. Figure 6 is document memory
Initial state diagram of DBUF, Figure 7 is display memory
A state diagram of the VRAM, FIG. 8 is a state diagram of the document memory DBUF showing the operation results according to this embodiment, FIG. 9 is a display memory state diagram according to the operation results, and FIG. 10 is a flowchart showing the operation procedure of this embodiment. , 1st
FIG. 1 is a flowchart showing the screen display procedure according to this embodiment. CPU...Microprocessor, KB...Keyboard, ROM...Read-only memory, RAM...
...Random access memory, DBUF...Document memory, VRAM...Display memory, CG...Character generator, CRTC...CRT controller, CRT...Display unit, BUS...Common bus,
CR...Cursor, N...CPU internal register (DBUF line counter), P...CPU internal register (VRAM line counter), L...CPU internal register (line spacing value accumulation counter).

Claims (1)

[Scope of Claims] 1. Holds first line spacing information regarding a plurality of character lines to be displayed and second line spacing information different from the first line spacing information, and holding the first line spacing information. and when displaying the plurality of character lines based on the second line spacing information, based on the first line spacing information and the second line spacing information, determining how many of the character lines fit on one page. A display control method comprising controlling a display to display a pattern indicating a page break that allows the number of lines to be identified.