JPH01251087A - Mouse cursor display control system - Google Patents

Abstract

PURPOSE:To normally display the corresponding part in an inversion display area even if a mouse cursor is moved to the outside of the inversion display area by rewriting the fetched data to a usual display use without leaving it in a state as it is and saving it, when a moving destination of the mouse cursor is in an inversion display designated state. CONSTITUTION:When mouse cursor movement instructing information from a mouse 25 is received, a CPU 10 fetches display data of an area in a video RAM 20 corresponding to a moving destination, and when the moving destination of the mouse cursor is in an inversion display designated state, the fetched data is rewritten to a usual display use and saved. Accordingly, a mask is put onto the moving destination and the mouse cursor is displayed, and thereafter, even if this mouse cursor is further moved, it can be restored to its original normal inversion display state by rewriting the display data which has been saved in advance to an inversion display use and redisplaying it in the original area. In such a way, even if the mouse cursor is moved to the outside of the inversion display area, it does not occur that the corresponding part in the inversion display area is left whitely in a shape of the mouse cursor.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a display control method for a mouse cursor used for specifying a position on a display device, and in particular to The present invention relates to a display control method suitable for moving.

(Prior Art) In an information processing device equipped with a video RAM, in order to specify an arbitrary position on the display screen of a display device, a mouse or other pointing device that can be moved on the display screen in accordance with the operation of a pointing device has conventionally been used. A cursor is used. In addition, in this type of information processing device, a so-called inverted cursor display is used to display characters or strings of characters in an arbitrary area on the display screen of the display device inverted (black and white inverted) for reasons such as clearly indicating that they are to be processed. is being carried out.

Now, when a mouse cursor is moved and displayed on a display device that displays an inverted cursor (inverted display), there is a possibility that the mouse cursor overlaps with the inverted display area. In this case, if the mouse cursor (displayed in black) is simply displayed overlapping the reverse display area, it becomes difficult to identify the mouse cursor on the screen. Therefore, conventionally, a mask pattern of the size of one character, for example, which has a white area that is somewhat larger than the mouse cursor, is prepared, and this mask pattern is used to move the mouse cursor to the area (one character area).
Specifically, the display data of the destination area and the mask pattern are logically ANDed for each corresponding dot, and the result is used as the display data of the destination area to mask), and then the mouse cursor is The mouse cursor is moved and displayed by performing an exclusive OR (XOR) of the pattern) with display data in the destination area.

(Problem to be Solved by the Invention) In the conventional mouse cursor display control method described above, when the mouse cursor is moved outside the reverse display area, the corresponding part in the reverse display area where the mouse cursor was displayed until then becomes the mouse cursor. There was a problem that the shape of the paper remained white.

Therefore, even if the mouse cursor is moved outside the reverse display area, the corresponding part within the reverse display area where the mouse cursor was previously displayed can be displayed normally without remaining white in the shape of the mouse cursor. The problem to be solved is to

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a video RAM that corresponds to a destination of a mouse cursor instructed by a mouse cursor movement instruction means.
Display data storage means for extracting display data of the inner area and saving it as it is if the destination is not in a reverse display designation state, and in a rewritten state for normal display if the movement destination is in a reverse display designation state; , a mouse cursor display means for displaying the mouse cursor by writing a mouse cursor pattern after applying a predetermined mask to the area in the video RAM that is subject to the storage processing of the display data storage means, and moving the mouse cursor. In some cases, the data stored in the display data storage means regarding the area of the movement source may be rewritten to display in reverse display depending on whether or not the movement source is in a reverse display designation state, or the data may be left unchanged to correspond to the movement source. This feature is characterized in that the data is written into an area within the video RAM and displayed again.

(Function) According to the above configuration, when the mouse cursor is moved, the display data of the area in the video RAM corresponding to the movement destination is retrieved, and when the mouse cursor movement destination is in a reverse display specified state, the retrieved data is left unchanged. Since it is rewritten and saved for normal display rather than the state, even if you move the mouse cursor further after masking the above movement destination and displaying the mouse cursor, it will be saved first. By rewriting the displayed display data for inverted display and redisplaying it in the original area (movement source), the original normal inverted display state can be restored. Further, when the inverted display state is canceled midway and the mouse cursor is moved thereafter, normal display can be performed by simply redisplaying the saved display data in the original area.

(Embodiment) FIG. 1 is a flowchart showing a mouse cursor display control processing procedure according to an embodiment of the present invention, and FIG. 2 shows an embodiment of an information processing device, such as a document creation device, to which the above processing procedure is applied. FIG. 2 is a block configuration diagram.

In FIG. 2, 10 is a microprocessor (hereinafter, c
pu), 11 is a RAM accessed by the CPU 10, and 12 is a ROM. The CPU 10 controls the entire device, and the RAM 11 and ROM
12 and starts a program according to input instructions to execute document creation processing, external character creation processing, and mouse cursor control processing as shown in FIG. 1 above. R.A.
A document area, a line image area (print buffer), a non-character registration area, and a storage area for display data corresponding to the mouse cursor movement destination (none of which are shown) are secured in M11. The ROM 12 includes a program area 13 that stores programs that determine the operation of the CPU 10 and input/output processing programs including a mouse cursor display control routine as shown in FIG. 1, as well as character patterns that store display or print character patterns. It has an area 14, a dictionary area 15 in which various dictionaries for converting readings input in kana or Roman characters into kanji are registered.

In addition, 16 is a keyboard (KB), 18 is a display/indicator, 2
1 is a floppy disk device (FDD), 23 is a printer (PRT), and 25 is a pointing device, such as a mouse. The keyboard (KB) 16 inputs information necessary for document creation etc. using a keyboard interface (KB-16).
IP) 17 to the CPU 10. The keyboard 16 is provided with various character keys, cursor keys, etc. The 0 display 18 is a 0 display controller (display CNT) 1 consisting of, for example, a 10-line liquid crystal display device.
9 controls the display of the display 18 using the video RAM 20 under the control of the CPU 10; the floppy disk device 21 has a disk interface (FDD-IP) 2;
2, under the control of the CPU 10, the created document is saved and external characters etc. are stored. The printer 23 communicates with C through a printer interface (PRT-IP) 24.
Under the control of the PU 10, a created document or character information read into the main body from the floppy disk device 21 is printed. The mouse 25 is a mouse interface (
It is used for specifying various positions (and specifying a function selection, etc. accompanying the position specification) via the mouse IF) 26.

Next, the operation of one embodiment of the present invention will be described using the flowchart of FIG. 2 and with reference to the display screen state transition diagram of FIG. 3.

The display data currently stored in the video RAM 2G (
It is assumed that a display image) is being displayed on the display 18 under the control of the display controller 19.

It is assumed that the contents (part) of the display screen at this time are as shown in FIG. 3(a). In Figure 3 (a>, code 3
The area indicated by 1 (in this case, the English letter B).

The area corresponding to the four characters C, D, and E) indicates the reverse display area (the designated area of the reverse display mode, that is, the display area of the reverse cursor), and the pattern indicated by the symbol MC located outside this reverse display area 31 is It is a mouse cursor. This figure 3 (
In the screen display state of a), the mouse 25 is operated to instruct the mouse cursor MC to move to the reverse display area 31 (in the direction of the letter C) as shown by the arrow 32, and the movement instruction information is gamau, interface 2
6 to the CPU 10.

When the CPU 10 receives the mouse cursor movement instruction information from the mouse 25, the CPU 10 moves the mouse cursor to the movement destination area indicated by the reference numeral 33 in FIG. video RA (that is, a new mouse cursor MC pattern should be written)
The display data in the area within M20 is sent to the display controller 19.
(Step $1)
) Next, the CPU 10 determines whether or not the area 33 from which the display data is to be retrieved to the RAM 11 at least partially overlaps with the inverted display area (in this case area 31) (in which the inverted cursor is displayed) (i.e. Check whether at least a portion of the mouse cursor MC overlaps with the inverted cursor when the mouse cursor MC is moved.

As in this embodiment, the area 33 and the reverse display area (area 3
If there is an overlap with 1), CPU1G is RA
Of the display data corresponding to area 33 taken out to the work area of M11, the part (
After the inverted cursor portion that overlaps when the mouse cursor MC is moved is inverted (black and white inverted), it is saved in a predetermined storage area of RAM II.

That is, the RAM 11 restores the display data corresponding to the extracted area 33 to the working area of the RAM 11 into a normal display format (non-reversed display format) and stores it. Note that the inverted display state of the area 33 on the display screen does not change. On the other hand, if there is no overlap between the area 33 and the inverted display area (area 31),
The CPU 10 transfers the display data corresponding to the extracted area 33 to the working area of the RAM 11 as it is to the video RAM 20.
Save it in the specified storage area within.

When the CPU 10 performs the data storage process consisting of steps 81 to S3 or steps 31 and S2.34 described above, the CPU 10 first stores the mask (mask pattern) MASK indicated by the symbol MASK in FIG. 3(c) as indicated by the arrow 34. As shown in FIG.
Step S5).

Here, the mask MASK is a pattern for one character with a white outline somewhat larger than the mouse cursor MC, and the display data of the area in the video RAM 20 corresponding to the area 33 is ANDed (logical product) for each corresponding bit. ) is taken,
When cptrio finishes step S5, the area 33
Move the mouse cursor M to the area in video RAM 2G corresponding to
Write pattern C in the same manner as before (step S
6) As a result, the screen display state of the display 18 changes as shown in FIG.

After cptyio performs the mouse cursor display process consisting of step 85.36 described above, it checks whether the next mouse cursor movement is instructed from the mouse 25 (step S7), and if so, the following steps are performed. To perform the redisplay process, that is, the CPU 10 first retrieves display data in the normal display format saved in a predetermined storage area of the RAM 11 and displays the area where the mouse cursor MO is currently displayed (i.e., the new movement source). 33 in the video RAM 2G and redisplays it in the normal display state (step 81G). Next, the CPU checks whether or not the area 33 overlaps with the reverse display area (step 39).
As shown in FIG. 3(e), if it overlaps with the current inverted display area (here, the previous inverted display area 31), the display data (normal display format display Invert only the data) and display it again in step 91G), then return to step S1 and move the new mouse cursor! Starts lJ display processing. On the other hand, if there is no inversion display area that overlaps with area 31 (this is the case where there is no inversion display area that overlaps with area 31 from the beginning, or the case where the overlapped area with area 31 when the mouse cursor is moved to area 31 (in some cases, the inverted display area that had the inverted display area is canceled and transitioned to the normal display area), the above-mentioned step 81G is skipped and a new mouse cursor movement display process is started.

The above explanation has been given for the case where it is applied to a document creation device, but it can also be applied to a personal computer, workstation, etc.
Applicable to all information processing devices that share a mouse cursor and an inverted cursor on a display screen [Effects of the Invention] As detailed above, according to the present invention, when the mouse cursor is moved, the area in the video RAM corresponding to the movement destination is When display data is retrieved and the mouse cursor destination is specified to be displayed in reverse, the retrieved data is not saved as is, but is rewritten for normal display and saved, so the mouse cursor is displayed at the above destination. Even if the mouse cursor is moved further after , the previously saved display data is rewritten for inverted display and redisplayed in the original area (move source), so that the original inverted display state is restored. can be restored correctly. Furthermore, according to the present invention, if the reverse display state is canceled midway and the mouse cursor is subsequently moved, the saved display data is simply redisplayed in the original area and normal display is restored. can be done.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a mouse cursor display control processing procedure according to an embodiment of the present invention, FIG. 2 is a block diagram showing an embodiment of a document creation device to which the above processing procedure is applied, and FIG. 3 is an operation diagram. FIG. 3 is a display screen state transition diagram for explaining. 10... CPU, 11... RAM, 18... Display, 20... Video RAM, 25... Mouse, 31
...Reverse display area, MASK...Mask (mask pattern) -MC...Mouse cursor.

Claims (1)

[Claims] In an information processing device equipped with a video RAM that stores a display image to be displayed on a display device, a movement instruction means for instructing movement of a mouse cursor used for specifying a position on the display device, and the movement instruction The display data of the area in the video RAM corresponding to the movement destination of the mouse cursor specified by the means is retrieved, and if the movement destination is not in a reverse display specified state, the movement destination remains in the reverse display specified state. If the display data storage means saves the data in a rewritten state for normal display if the display data storage means is in the state, a predetermined mask is applied to the area in the video RAM that is subject to the storage processing of the display data storage means, and then a mouse cursor pattern is displayed. a mouse cursor display means for writing and displaying the mouse cursor, and storing data in the display data storage means regarding the area from which the mouse cursor moves when the mouse cursor is moved so that the movement source is in the reverse display specified state. A mouse cursor display control method characterized in that the mouse cursor is rewritten for inverted display depending on whether the mouse cursor exists or not, or is written in an area in the video RAM corresponding to the movement source and redisplayed.