JPH07200239A - Screen scrawling method - Google Patents

Abstract

PURPOSE:To intuitively and dynamically vary the speed by setting a system in such a way that scrawling speed increases when a key depressed at the time of starting scrawling is kept depressed, and scrawling speed decreases when a different key is kept depressed. CONSTITUTION:When an upper key 61 is depressed if a scrawling is desired to be executed in the upward direction of a character and a graphic, which are displayed in a screen at present, the scrawling of the screen is started. Scrawling speed is slow at first, and it gradually becomes faster while the upper key 61 is depressed. When a user feels that scrawling speed has come to the optimum in accordance with the purpose of scrawling, the physical condition of the user and the operation speed of hardware at that time, scrawling speed starts to drop gradually if a lower key 62 in an opposite direction is simultaneously depressed or only the lower key 62 is depressed. When the user feels that scrawling speed has dropped too much, the lower key 62 is released, and scrawling speed starts to increase when the system is set to become a state where only the upper key 61 is depressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for scrolling a display screen in a word processor, a graphic processor or the like, and more particularly to a screen scroll method capable of appropriately changing the scroll speed by operating a keyboard or the like.

[0002]

2. Description of the Related Art Generally, a device for displaying characters such as a word processor has a central processing unit, a main memory, a screen display device, a screen control device and an interface device for connecting the central processing device and the screen control device. In the screen display operation, when the screen display control device enters the screen display enable state, a signal is issued to the central processing unit via the interface device, whereby an interrupt occurs and the display program is started.
When the display program is activated, it makes a character string display request to the screen display control device via the interface device and waits for the next interrupt. The requested screen display control device inputs a character string through the interface device and displays it on the screen display device. When this display ends, the screen display control device outputs the next character string display enable signal.

A conventional screen scrolling method (Japanese Patent Laid-Open No. 62-
Japanese Patent No. 145282) sets a delay time in a table provided in a main memory, waits for a set delay time after a display program is activated in response to a character string display enable signal, and then makes a character string display request to display a screen display controller The characters are displayed on the screen, and the scroll speed becomes slower when the delay time set is made longer, and becomes faster when the delay time is set short. The delay time is set by simultaneously pressing the CTRL key and the numeric key of the keyboard so that the scroll speed can be selected by operating the keyboard.

[0004]

In the conventional screen scrolling method described above, the scrolling speed must be set numerically, and intuitive and simple processing cannot be performed. That is,
What kind of numerical value should be keyed in as the delay time when trying to slow down the scrolling speed to see the screen scrolling at a certain speed?
The disadvantage is that you cannot judge unless you have some experience.

Further, a method of adjusting the scroll speed according to the pressing pressure of the key, the pressing depth, etc. (Actual Kaihei 1-85791)
However, this method has a drawback in that a specially structured key is required in addition to an ordinary keyboard.

[0006]

The screen scrolling method of the present invention is provided with a pair of keys for instructing scroll directions opposite to each other, and when any one of the pair of keys is first pressed, the first pressed key is The scroll speed is gradually increased until the maximum speed is reached while the scroll is started in the designated direction and only the first pressed key is pressed, and the first pressed key of the pair of keys is It is characterized in that the scroll speed is gradually reduced until the minimum speed is reached while the other key is pressed, and the scroll is stopped when the pressing of any of the pair of keys is stopped.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an information processing system equipped with a screen display device for carrying out a screen scrolling method according to an embodiment of the present invention. An initialization program 21, a display program 22, a scroll condition setting program 23, and a scroll control table 24 are provided in the main memory 20 connected to the central processing unit 10, and the scroll control table 24 shows whether or not scrolling is being executed. Identifier A, identifier B indicating the direction of scrolling, waiting time C indicating the time between one screen being scrolled and the next screen, and remaining time indicating how much waiting time remains until the next screen is displayed. D is stored.

Interface device 1 to central processing unit 10
A screen display control device 40 for controlling the screen display device 50 via 0 and a keyboard 60 are connected. The keyboard 60 is provided with various keys such as a character input key,
In particular, a key (hereinafter, referred to as an up key) 61 on which an upward arrow for scrolling is displayed and a key (hereinafter, referred to as a down key) 62 at which a downward arrow is displayed are provided.

The relationship between the operation of these keys 61 and 62 and the screen scroll is as follows.

For example, when it is desired to scroll upwardly on the character or graphic currently displayed on the screen, the up key 61 is pressed. At this point, scrolling of the screen starts. Although the scroll speed is low at the beginning, the scroll speed gradually increases while the up key 61 is pressed. Depending on the purpose of scrolling at that time, the physical condition of the user, the operating speed of the hardware, etc., if you feel that the optimal scroll speed has been reached, press the down key 62 in the opposite direction at the same time or press only the down key 62. By doing so, the scroll speed gradually starts to decrease. When the user feels that the scroll speed has decreased too much, the down key 62 is released, and only the up key 61 is pressed, whereby the scroll speed starts to increase again.

In this way, the down key 62 and the down key 6 are pressed simultaneously.
It is possible to realize scrolling while keeping the scroll speed, which seems to be optimal, almost constant by repeating the release of 2 alternately. The scroll speed at this time can be dynamically changed by adjusting the up and down scroll keys, and can be easily operated just as if the speed was adjusted by the accelerator and brake of the automobile.

In the scroll state, the up and down keys 61, 62
If they are released together, the screen scrolling immediately stops at that point, and accurate positioning can be performed.

The initialization program 21 in the main memory 20 shown in FIG. 1 is executed at system startup, and the identifier A is set to stop scrolling, the waiting time C is set to the maximum value, and the remaining time D is set to "0". deep.

The display program 22 is activated when the screen display control device 40 outputs a display enable signal as shown in FIG. 2 (step S11). When activated, the contents of the scroll control table 24 are checked, and if the identifier A is set to scroll execution, the process moves to the next process to display the scroll screen (step S12). Next, if the remaining time D in the scroll control table 24 is not "0", the remaining time D is counted down by the clock signal (steps S13 and S14).

If the remaining time D is "0", the remaining time D is set to the waiting time C (steps S13 and S15), and if the identifier B in the scroll control table 24 indicates upward scrolling, the data storage section. Data that is one line above the previous screen (not shown) is read out, and a character string display request is issued to the screen display control device 40 (step S1).
6, S17), if the identifier B indicates downward scrolling, a character string display request of data shifted by one line from the previous screen is issued (steps S16, S18). In response to the character string display request, the screen display control device 40 causes the screen display device 50 to
After the screen is displayed on, the next displayable signal is output.

With this display program 22, the time between the scroll screens is almost the waiting time C. Therefore, if the waiting time C is increased, the scroll speed becomes slower, and if it is decreased, the scroll speed becomes faster.

The scroll condition setting program 23 is started at one time interval, and as shown in FIG. 3, it is checked in step S1 which key is pressed, and if it is pressed, the key pressed in step S2. Is an up key 61 or a down key 62. The key pressed is the up key 61
If the identifier A in the scroll control table 24 is the scroll stop, the identifier A is scrolled,
If the identifier B is the upward scroll, the pressed key is the down key 62, and the identifier A is the scroll stop, the identifier A is the scroll execution, and the identifier B is the downward scroll (steps S3 and S7).

The pressed key is the up key 61 or the down key 62.
Then, if the identifier A is scroll execution, step S4 is performed (steps S2 and S3). In step S4, if the scroll direction indicated by the identifier B is the same as the direction indicated by the pressed key, the waiting time C is decreased by a predetermined value to accelerate the scroll (steps S4 and S5), and the scroll is pressed. If the direction indicated by one of the keys is opposite to the direction indicated by the identifier B, the waiting time C is increased by a predetermined value and the scroll is decelerated. However, these operations are performed only when the waiting time C is within the range between the maximum value and "0" (steps S4, S
6). Up key 61 or down key 62 in steps S1 and S2
None of the buttons are pressed and the scroll control table 24
If the inside identifier A is scroll execution, the identifier A is stopped, the waiting time C is set to the maximum value, and the remaining time D is set to "0" (steps S8, S9, S10).

With the scroll condition setting program 23, it is possible to change the scroll speed by operating the keys 61 and 62.

Further, the steps S4 and subsequent steps in FIG. 3 are changed,
When the direction indicated by the pressed key is the same as the direction indicated by the identifier B, the waiting time C is decreased, and when only the opposite direction, the waiting time C is increased and the same or the opposite direction is obtained. When two such keys 61 and 62 are pressed at the same time, if the waiting time C is neither decreased nor increased, pressing the keys 61 and 62 at the same time can obtain a constant speed scroll. .

Although the present embodiment has been described for the case of vertical scrolling, the present invention is also applicable to horizontal scrolling and vertical and horizontal scrolling.

Up and down keys 61 for scrolling,
It goes without saying that a key generally used for moving the cursor can be used as 62.

[0024]

As described above, according to the present invention, when the key pressed at the start of scrolling is continuously pressed, the scroll speed increases, and when the key for indicating the opposite direction to this key is continuously pressed, the scroll speed decreases. By
While visually observing the actual scroll speed and the change according to the operation, it adjusts the speed with the accelerator and brake of the car without the need to make a conceptual decision to set the speed numerically. The scroll speed can be changed intuitively and dynamically, and the scroll speed can be adjusted flexibly.

Further, by using a general cursor moving key or the like as the scroll instruction key, it is not necessary to provide a special key, so that the required cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an information processing system for an embodiment of the present invention.

FIG. 2 is a flowchart showing a display program 22 shown in FIG.

FIG. 3 is a flowchart showing a scroll condition setting program shown in FIG.

[Explanation of symbols]

 10 central processing unit 20 main memory 21 initialization program 22 display program 23 scroll condition setting program 24 scroll control table 30 interface device 40 screen display control device 50 screen display device 60 keyboard 61 scroll instruction key (upper key) 62 scroll instruction key (Down key) A identifier (scroll execution, stop) B identifier (scroll direction) C waiting time D remaining time

Claims (2)

[Claims] 1. A pair of keys for instructing scroll directions opposite to each other is provided, and when any one of the pair of keys is first depressed, scrolling is started in a direction instructed by the first depressed key, and first, While pressing only the pressed key, the scroll speed gradually increases until it reaches the maximum speed, and at the lowest while pressing the other key of the pair of keys that is not the first pressed key. A screen scroll method, wherein the scroll speed is gradually reduced until the speed is reached, and the scroll is stopped when the pressing of any of the pair of keys is stopped. 2. A pair of keys for designating scroll directions opposite to each other is provided, and when any one of the pair of keys is first depressed, scrolling is started in a direction designated by the first depressed key, While pressing only the pressed key, the scroll speed gradually increases until it reaches the maximum speed, and while pressing only the other key of the pair of keys that is not the first pressed key. A screen characterized in that the scroll speed gradually decreases until reaching the minimum speed, the scroll speed does not change while the pair of keys are simultaneously pressed, and the scroll stops when the pressing of any of the pair of keys is stopped. How to scroll.