JPS59111684A - Input field connection control system for display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a display control method in a display device, and in particular, when an input field for a single item spans two or more lines on a screen, each field is This invention relates to a method for controlling the connection between each field so that it can be handled as a single field.

[Technology background]

Recent display devices are equipped with advanced functions, such as the ability to perform processes such as inserting and deleting input field data on the display device itself without the intervention of a host computer.

Therefore, addresses on the screen buffer are normally given consecutively to the row and column positions that make up one field in the screen space. For example, as shown in Figure 1 (
The screen buffer space for a screen of M rows and N digits as shown in a) is allocated in the real memory as shown in FIG. 2B. For this reason, if you try to set an input field that spans two or more lines for one data item, unless special processing is performed, for example, as illustrated in the input fields for "Notes" and "Hobby" in Figure 2, The display format starts from the left edge of the screen on the second line. In FIG. 2, l is a screen, the mark "mouth" exemplified by 2 is an attribute that defines a field, especially 2α and 2b are attributes that define an input field, 3 is an item name field, and 4 is an input field. , 4-1 and 4-2, input field 4 is 2
The first line and the second line are respectively shown in the case where the line spans the line. Also, if the field ends at the right edge of the screen, as shown in the Address input field,
Attributes can be omitted.

However, in the display format shown in Figure 2, when the input field spans two lines, some of the data will end up on the left side of the screen where many item names 3 are displayed vertically. The drawback was that the data was difficult to read. For this reason, conventional screen designs use an additional attribute 2c to define the second line 4-2 as another input field, and align the starting positions of each input field vertically, as shown in Figure 3. was carried out. However, according to this method, by dividing what should originally be one input field into two, overflows and blanks that occur when inserting or deleting data in the first line 4-1 are avoided. The shift for processing is not automatically connected to the second line 4-2, and a new shift operation is required for the second line, making the insertion and deletion functions difficult to use. There was a problem with that.

[Object and structure of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a means for concatenating each line in a process such as insertion or deletion in a display device, when the length of a field on the screen spans two or more lines, without requiring each line to be a consecutive address on the screen buffer. Our goal is to provide the following.

As a means for achieving this, the present invention makes it possible to expand attributes as necessary, and store pointer information for connecting the next line field to the extended a) IJ pute, and as a configuration for this purpose, When an input field for a single item spans multiple lines on the screen, in a display device that uses attributes to control the field, an extension area and an extension display flag are provided in the attribute, and when the extension display flag is ON, the extension area is is configured to enable, and when an input field for a single item spans multiple lines during screen operations,
Set the extension display flag of the attribute that starts each input field to ON, and store the address of the attribute that starts the next line field in the extension area, and perform connected field processing that spans between fields for the input field that spans multiple lines. When performing processing such as insertion or deletion that may be necessary, refer to the expanded display flag of the attribute that starts the input field, and if it is set to ON, the information stored in the expanded area. This method is characterized in that the next row field start address is read and connected field processing is executed.

[Embodiments of the invention]

The present invention will be explained below based on examples.

FIG. 4 shows a schematic configuration of a general display device in which the present invention is implemented, in which 5 is a CRT, 6 is a keyboard, and 7 is a display device in which the present invention is implemented.
8 represents a display control section, 8 a screen processing section, 9 a screen buffer, 10 an attribute buffer, 11 a CRT control section, and 12 an interface section.

The display control section 7 controls transmission with the host computer via the interface section 12. The screen processing unit 8 sets screen data and attributes on the screen buffer 9 and the attribute buffer 10 in accordance with the output from the keyboard 6 or the host computer, and also performs screen editing processing such as insertion and deletion. The CRT control section 11 also includes a character generator (not shown), and performs control to display screen data set in the screen buffer 9 on the CFLT 5.

FIG. 5 is an explanatory diagram of attributes used in the conventional example. In the same figure, 9 is the same as the screen buffer 9 shown in FIG. 4, and IO is also an attribute buffer. The screen buffer 9 and the attribute buffer 10 have a double structure in which they are accessed correspondingly by MxN addresses. Reference numeral 13 in the figure is an attribute, which has a length of 2 bytes and is separated from areas A and B of 1 byte. A character code for displaying attribute mark 2 (r[lJ) on the screen is set in area A, and is stored at the designated address b of screen buffer 9. Also, in area B,
Control information for managing data attributes in the screen buffer on a field-by-field basis and processing the screen on a field-by-field basis is set and stored in the attribute buffer IO.

However, such conventional attributes do not have enough free space, so when concatenating a field to the next line in the format explained in Figure 2, a pointer indicating the starting position of the field in the next line, that is, a concatenation Field addresses cannot be stored within attributes. Therefore, in the embodiment of the present invention, the size of the attribute is increased to, for example, 4 bytes, so that when it is necessary to set a concatenated field address, the extended attribute part can be used. Also, at that time, a flag is set to indicate whether the attribute is used as an extended attribute.

FIG. 6 is an explanatory diagram of an extended attribute according to one embodiment of the present invention, and shows a case in which the conventional attribute shown in FIG. 4 is extended. In Figure 6,
14 represents an attribute, 15 represents an extended display flag, and 16 represents an extended attribute portion.

The extended attribute portion 16 has a length of 2 bytes. This is because the address length of the screen buffer 9 and attribute buffer 10 is 12 bits in this embodiment. A 12-bit area indicated by C in this extended attribute portion 16 is allocated as a setting area for the concatenated field address, and the remaining 4 bits are set as an unused area.

In the connected field address area C, the address of the start attribute of the next row field illustrated as 2a' in FIG. 3 is set. In Figure 6, this is generalized and shown by an arrow pointer that connects the attribute of the field starting from address L to the attribute of the next field starting from address j. Even if it spans three or more rows, you can connect successive fields using the method described above. Note that area C for the attributes of the last connected field will be empty, so the attributes of the fields in the first row will be added here. You can also set a pointer address for .

FIG. 7 is a schematic flow diagram of screen processing according to an embodiment of the present invention. A brief explanation will be given below with reference to the figures.

(2) For example, on the screen shown in FIG. 3, it is assumed that the data in the field 4-1 of the first line of the item "Hobby" has been modified by insertion or deletion. In the case of insertion, characters overflow from the right end of the line, and in the case of deletion, the right end of the line becomes blank.

(2) Next, in order to find out whether or not there is a field in the second line to be concatenated, set the extended display flag 15 (FIG. 6) 1r of attribute 2α. This is "OF
”, the process ends as is.

(2) However, if the extended display flag is 'ON', the attribute is determined to be an extended attribute, and the connected field address of the next line, that is, the second line, is taken out from the C area.

(2) Access the field data using the retrieved concatenated field address and perform shift processing that concatenates it with the field in the first row. After that, return to ■ again,
The attribute of the relevant connected field is checked, and if connected field processing is necessary, 0 and ■ are repeated, and the process ends at the line where the extended display flag of the attribute is 'OF'F''.

In this way, concatenated field processing can be automatically performed on any number of lines.

〔Effect of the invention〕

As described above, according to the present invention, when an input field spans multiple lines, by setting a concatenated field address in an attribute in advance, each field is automatically concatenated during processing such as insertion or deletion. , processing can be executed as a single piece of data. Therefore, the start address of each line from the next line onwards can be set at any position without being fixed to the left edge of the screen, making it possible to freely design an easy-to-read screen.

[Brief explanation of the drawing]

FIGS. 1(α) and (b) are explanatory diagrams of the screen buffer, FIGS. 2 and 3 are explanatory diagrams showing the display format when the input field spans multiple lines, and FIG. 4 is the system according to the embodiment of the present invention. FIG. 5 is an explanatory diagram of conventional attributes, FIG. 6 is an explanatory diagram of extended attributes according to the embodiment of the present invention, and FIG. 7 is a processing flow diagram. In the figure, 1 is the screen, 2.2α, 2b, 2c are attributes, 4.4-L 4-2 is a field, 9 is a screen buffer, IO is an attribute buffer, 14 is an extended attribute, 15 is an extended display flag, C represents a concatenated field address storage area. Patent Applicant Fujitsu Ltd. Representative Patent Attorney Fumihiro Hase (1 other person) 1st figure 2nd figure 3rd figure 4th figure 5 Leap

Claims (1)

[Claims] When an input field for a single item spans multiple lines on the screen, in a display device that uses attributes to control the field, set an extended area and extended display flag in the attribute, and set the extended display flag to ON.
When , the expansion area is configured to be enabled, and when operating the screen, the expansion display flag of the attribute that starts each input field is set to ON, and
Store the address of the attribute that starts the next line field in the extended area, and when performing insertion, deletion, etc. processing that may require concatenated field processing across fields for the input field that spans multiple lines, the corresponding An input field concatenation control method characterized in that a concatenated field process is executed by referring to an extended display flag of an attribute that starts an input field, and reading out a next line field start address stored in the expanded area.