JPH07199899A - Image display control system - Google Patents

Abstract

PURPOSE:To improve the efficiency of forming and editing of a document by recognizing a printer print output image by a display image on a CRT screen when the line feed width, etc., is revised. CONSTITUTION:The data inputted from a key board 300 are stored in a text data storage mechanism 4 as the side of the text data, and further, the line feed widths of respective rows are stored in an every row new paragraph width storage mechanism 5. By providing two VRAMs 8, 9, a text picture and a printer print image display picture as usual are switched and displayed through one action. A process reading out the line feed widths of respective rows, taking out the text data by N rows, and shifting and superposing character dot patterns corresponding to respective rows taken out from a font ROM 3 by the new paragraph width for forming the printer print image picture is performed in a picture process mechanism 6. Further, when a character is corrected, by that a superposing process with the character of the row with less width is performed according to the line feed width of the row in which the character exists by the picture process mechanism 6, the matter that the character is chipped is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CRT line feed width image display control system in a document preparation device such as a word processor device.

[0002]

2. Description of the Related Art Conventionally, in a document creating apparatus such as a word processor, when a document created on a CRT screen is printed out by a printer, the display image on the CRT screen does not always match the print image. There's a problem. For example, a document represented by printing on a printer as shown in FIG. 2A is displayed over three lines on the CRT screen as shown in FIG. 2B.

Japanese Unexamined Patent Publication No. 2-70472 discloses a technique aimed at knowing the actual position on the printing paper on this display screen because the display position is constant regardless of the format setting information. ing. In this technique, the print output position of the data can be calculated based on the print format setting information obtained by the format setting means and displayed on the data display screen by the display means.

[0004]

With this technique, the three-line display shown in FIG. 2B could not be changed to the one-line display shown in FIG. 2A.

[0005]

The first system of the present invention analyzes each line feed line width storage mechanism that stores the line feed width of each line for the text to be edited on the screen of the CRT and the data input from the outside. The input control unit that determines whether or not the analysis result is the line feed width specified input, and the line feed width of the line that corresponds to each line line feed width storage mechanism that is determined to be the line feed width designation by this input control unit is transmitted, input or changed. And a screen processing mechanism for performing line feed width control processing for superimposing character dot patterns for displaying a screen in a printout image in response to the notification from the writing control section. including.

A second system of the present invention is a font ROM for storing font pattern data of characters to be displayed on a CRT screen, a row and a column position of a text to be edited displayed on the CRT screen, and positions thereof. The screen processing mechanism includes a text data storage mechanism that stores character data of a sentence as a text code, and a screen image display VRAM that holds a dot pattern when performing a screen display by controlling a line feed width. For each line that has been input or changed, the line feed specification is read from each line feed width storage mechanism, and if the read line feed width is not a normal line feed, the character data of the specified line is read from the text storage mechanism. Read the dot pattern corresponding to the characters from the font ROM and the column corresponding to each row. And writes the logical sum of Judges character pattern prisoners results in the appropriate position of the screen image display VRAM.

[0007]

An embodiment of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, one embodiment of the present invention is
The font ROM 3 that stores the font pattern data of the characters displayed on the screen of the CRT 40, and the position of each row and column of the text to be edited displayed on the screen of the CRT 40 and the character data of the text are stored as text codes. Text data storage mechanism 4, each line feed width storage mechanism 5 that stores the line feed width of each line for the text to be edited on the screen of the CRT 40, and text that holds a dot pattern when screen display is performed without performing line feed width control VRAM 8 for data display and V for screen image display that holds a dot pattern for screen display with line feed width control
The RAM 9, the keyboard 30, the input control unit 1 that analyzes the data input from the keyboard 30 and determines whether the analysis result is a normal character input, a line feed width designation input, or a screen display state switching designation, and When the input control unit 1 determines that the screen specification has been switched, the key input for displaying the screen display as a printout image is detected, and the text data equivalent to the conventional one is displayed or the line feed width is controlled. Screen display state control mechanism 7 for instructing whether to display a screen with a printout image, and VRAM selection for selecting which VRM data is to be displayed on the CRT 40 in response to an instruction from the screen display state control mechanism 7. When a normal character input is designated by the mechanism 10 and the input control unit 1, a character dot pattern corresponding to the input character data is printed. The character dot pattern taken out from the input ROM is displayed at the corresponding position on the text data display VRAM 8 for displaying the screen without controlling the line feed width, and the inputted character code is written at the corresponding position of the text data storage mechanism. When writing as it is and receiving a line feed width designation from the input control unit 1, each line feed line width storage mechanism 5
To the line feed width of the line corresponding to the above, and when the accumulation of the character code or line feed width is completed, the writing control unit 2 that notifies the input or changed line, and the printout image in response to the notification from the writing control unit 2 And a screen processing mechanism 6 for performing line feed width control, that is, a process for superimposing character dot patterns for screen display.

The line feed width image display control mechanism 20 is intended to increase the efficiency of the operator's document creation work by displaying the screen display as an actual printout image in a document creation device such as a word processor. Therefore, there are two screen display states: a mode in which the display is equivalent to that of a conventional screen and a mode in which the line feed width is changed and an actual printout image is displayed. In the mode of displaying the same as the conventional screen, compatibility with the conventional environment can be provided and the screen can be displayed in the same manner as the conventional screen. By holding the dot patterns in both modes, these display states can be switched with one touch by the operator's key input operation.

Next, the operation of one embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, when the line feed width image display control mechanism 20 receives an input from the keyboard 30, it controls whether it is a normal character input, a line feed width designation input, or a screen display state switching designation. Judgment is made in part 1.
When the screen display state switching is designated, the screen display state control mechanism 7 is informed that the display state switching instruction has been issued.
The screen display state control mechanism 7 that has received the change instruction uses the VRAM.
Whether the text data displayed on the selection mechanism 10 is equivalent to the conventional one,
Or, specify whether to display the screen with a printout image that controls the line feed width. VRAM selection mechanism 10
According to the instruction, which VRAM data is CRT40
Select whether to display in.

In the case of character input and line feed width designation, the input data is transmitted to the write control unit 2. When a character is input, the writing control unit 2 extracts a character dot pattern corresponding to the input character data from the font ROM 3 and writes it in the corresponding position on the VRAM 8 for displaying text data. Further, the write control unit 2 writes the input character code as it is in the corresponding position of the text data storage mechanism 4. The text data storage mechanism 4 stores the position of each line and each column and the characters written therein for the text to be edited.

FIG. 3 shows a character data storage image of the text data storage mechanism 4. When the input data is the line feed width designation, the writing control unit 2 notifies the line feed width storage mechanism 5 of the line feed width of the corresponding line. The line feed width input here is the line feed ratio when the normal line feed width is 1, and 0 ≦ line feed width ≦ 1. The line feed width storage mechanism 5 stores the line feed width of each line for the text to be edited.
In this way, each data is accumulated when a sentence is created in the normal display state.

When the accumulation of the character code or the line feed width is completed, the writing control unit 2 notifies the screen processing mechanism 6 of the input or changed line. The screen processing mechanism 6 reads the line feed width designation for each line from the notified line from the line feed line width storage mechanism 5. If the read line feed width is a normal line feed, the line feed width of the next line is read. If the line feed width is specified, the following processing is performed. Note that, here, a case where the line feed width is generally 1 / N (N is a positive integer) will be described. If the line feed width is specified as 1 / N,
A normal line feed width of 1 is used for N lines, and the reference line passing through the center of the line is shifted upward by 1 / N lines as compared with the case where the line feed width is 1. However, since the font size of the displayed characters is the same in each line, a part of the character pattern will be missing in the overlapping part. In order to avoid this state, it is necessary to display the characters on the first line to the characters on the Nth line in an overlapping manner. Therefore, the screen processing mechanism 6 reads the character data of the 1st to Nth lines from the text data storage mechanism 4, and the dot pattern corresponding to the characters of each line is read from the font ROM 3. Then, the logical sum of the character patterns of the corresponding columns of each row is calculated, and the V for screen image display is displayed.
It is written in the corresponding position of the RAM 9. The state of this series of processing is shown in FIG.

Further, in the case of correcting a portion where data already exists, the following processing is performed.

FIG. 5 shows a state in which "2/3" is changed to "1/3" on the actual printout image screen. In the printout image screen, when changing "2" to "1", if "1" is overwritten as it is, the character dot pattern of the character overlapping the changed character disappears as shown in FIGS. 5B and 5C. I will end up. In order to prevent this, in the line feed width image display control mechanism, as shown in FIG. 5D, the character dot pattern superimposing processing is performed in the step of changing the character. The screen processing mechanism 6 writes "1" in the position corresponding to "2" in the text data storage mechanism 4, and each line feed width storage mechanism 5
To retrieve the line feed width information for the line where "2" is displayed. If there is line feed width information, if the line feed width is 1 / N, character information for N lines is retrieved from the text data storage mechanism 4, and dot patterns corresponding to each character are retrieved from the font ROM 3. Then, for the column position of the changed character, the logical sum of the character dot patterns of the lines below it is calculated, and V for screen image display is displayed.
Write to the corresponding location in RAM 9. This makes it possible to prevent the dot pattern of the originally written character from being lost even if the character is added or modified later.

Thus, every time there is an input from the keyboard, data is written in each VRAM and screen display data is accumulated. The data stored in the VRAM selected by the VRAM selection mechanism 10 is the CRT4.
Displayed at 0.

[0018]

According to the present invention, the same screen display as the conventional one can be displayed, and the image when printed out can be confirmed on the screen with one touch. Since it is possible to perform editing work while checking on the screen without doing
At the same time it is possible to increase the efficiency of document creation,
There is also an effect that wasteful consumption of resources can be prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a conventional display example.

FIG. 3 is a diagram showing how text data is stored.

FIG. 4 is a diagram showing a state of superimposing processing of character dot patterns.

FIG. 5 is a diagram showing how a character is changed on a printout image screen.

[Explanation of symbols]

 1 Input control mechanism 2 Write control section 3 Font RAM 4 Text data storage mechanism 5 Line feed line width storage mechanism 6 Screen processing mechanism 7 Screen display state control mechanism 8 Text data display VRAM 9 Screen image display VRAM 10 VRAM selection mechanism 20 Line feed Width image display control mechanism 30 keyboard 40 CRT

Claims (2)

[Claims] 1. A line feed width storing means for storing a line feed width of each line for a text to be edited on a display screen, and data inputted from outside is analyzed to determine whether or not the analysis result is a line feed width designation input. Input control means, write control means for notifying the line feed width of the corresponding line to each line feed line width storage means when it is determined that the line feed width is specified by the input control means, and notifying the input or changed line, and the write control An image display control system comprising: a screen processing unit that performs a line feed width control process for superimposing a character dot pattern for displaying a screen in a printout image in response to a notification from the unit. 2. A font storage means for storing font pattern data of characters to be displayed on a display screen, a line of each line and a column of a text to be edited displayed on the display screen, and character data of the text. The text data storage means for storing the code, and the screen image display required pattern storage means for holding the dod pattern for performing the line feed width control and screen display are provided, and the screen processing means is notified from the writing control means. The line feed specification is read from each line feed width storage unit for the input or changed line that has been input or changed, and if the read line feed width is not a normal line feed, the character data of the specified line is read from the text data storage unit. The dot pattern corresponding to is read from the font storage means and the It is characterized in that the logical sum of the character patterns is taken and the result is written in the corresponding position of the screen image display pattern storage means.