JPH07129362A - Method for scrolling picture - Google Patents

Abstract

PURPOSE:To quickly execute scrolling by erasing a graphic picture, scrolling only a text picture and displaying the graphic picture at the time of stopping scroll instruction. CONSTITUTION:When an optical key on a keyboard 2 is depressed, whether or not the key corresponds to scrolling is judged. When the key corresponds to scrolling, a movable flag 10A is turned on and whether or not a cursor position is within a display enabled area is judged. When outside the display enabled area, whether or not a graphic picture is erased is judged, and when the picture is not erased, the graphic picture is erased and an erase flag 10B is turned on. If the movable flag 10A is turned on when the key depression corresponding to scrolling is released or when a key other than the key corresponding to scrolling is depressed, whether or not the cursor position is within the display enabled area is judged. When outside the area, a graphic picture is displayed, the erase flag 10B is turned off and the movable flag is also turned off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen scroll method for scrolling a screen in which graphic data and text data are mixed.

[0002]

2. Description of the Related Art When data is displayed on a display screen of a CRT or the like, an operation such as moving the cursor outside the displayable area causes the displayable area of the display screen to move, so-called scrolling. Done.

Further, in data of an editor or the like, graphic data and text data are mixed, and when scrolling the display contents of such a graphic / text mixed screen, the function key corresponding to the scroll is pressed. At this time, scrolling on the text screen is performed by block transfer of the text data stored in the screen buffer, and scrolling on the graphic screen is redisplayed each time. That is, the scroll of the graphic screen is for creating the data of the next screen every time the screen is moved and displaying it. Therefore, when the scroll function key is continuously pressed, the graphic screen is displayed again for the corresponding number of times.

[0004]

However, in the conventional screen scrolling method, when the scroll-capable key is continuously pressed, the graphic screen is redisplayed by the number of times corresponding thereto, so that it takes time to scroll to the desired display position. In addition, there is a problem that the operator is concerned about the flicker of the screen due to the redisplay.

The present invention has been made to solve the above-mentioned conventional problems, and provides a screen scrolling method capable of scrolling a graphic / text mixed screen at high speed and reducing screen flicker. The purpose is to

[0006]

According to the screen scroll method of the present invention, data in which text data and graphic data are mixed is displayed, and in the screen scroll method for scrolling the display screen, when scroll is instructed, It is characterized in that the graphic screen is erased and only the text screen is scrolled, and the graphic screen is displayed when the scroll instruction is stopped.

[0007]

In the screen scrolling method of the present invention, when an arbitrary key is pressed from the keyboard, it is first determined whether or not the pressed key corresponds to scrolling. If the key corresponds to scrolling, the movement flag is set to ON, and it is determined whether the cursor position is within the displayable area. If the cursor position is outside the displayable area, it is determined whether the graphic screen is being erased. If not, the graphic screen is erased and the erase flag is turned on. Then, only the text screen is scrolled. On the other hand, if the scroll-enabled key is released, or if a key that is not a scroll-enabled key is pressed,
It is determined whether or not the movement flag is ON, and if it is ON, it is determined whether or not the cursor position is within the displayable area. If the cursor position is outside the displayable area, the graphic screen is displayed and the erase flag is set to OF.
The flag is set to F and the movement flag is also set to OFF.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a flow chart for explaining the screen scroll method of the present invention. Prior to explaining this flow chart, a system for implementing the screen scroll method of the present invention will be described.

FIG. 2 is a block diagram showing the system configuration. The system shown in the figure comprises a microcomputer and the like, and comprises a display unit 1, a keyboard 2, a control unit 3, and a data storage unit 4. The display unit 1 is
The display is a CRT or the like for displaying text data and graphic data. Keyboard 2
Is an input unit including various keys such as function keys for data input and screen scrolling.

The control unit 3 is a control unit for controlling display on the display unit 1, data processing from the keyboard 2, and the like. The continuous press recognition unit 31, text screen display unit 32, graphic screen display unit 33, and display The control means 34 is provided.

The continuous depression recognizing means 31 has a keyboard buffer for receiving a key input from the keyboard 2. Based on the key code from the keyboard buffer, whether the scroll function key is continuously depressed, or from the continuously depressed state, It has a function of recognizing whether it has been canceled. The text screen display means 32 displays a text screen on the display unit 1 under the control of the display control means 34. Graphic screen display means 33
Like the text screen display unit 32, displays a graphic screen on the display unit 1 based on an instruction from the display control unit 34.

The display control means 34 is the continuous press recognition means 3
It is a control unit that sets and releases the movement flag 10A and the erasure flag 10B based on the recognition result from 1 and performs arithmetic processing such as calculation of a display position after scrolling.
Further, here, the movement flag 10A is a flag indicating whether or not the scroll corresponding key is pressed, and the deletion flag 10B is a flag indicating whether or not the graphic screen is displayed on the display screen. The data storage unit 4
Is an external storage device for storing display data and the like.

Next, a screen scroll method in such a system will be described with reference to the flow chart of FIG. First, the continuous press recognition means 31 reads one character from the keyboard buffer (step S1) and determines whether this is equal to the code of the scroll-compatible key (step S2). In this embodiment, the scroll-compatible keys are cursor movement keys.

In step S2, if the code is the same as the code of the scroll-compatible key, the code is displayed.
4, and the display control means 34 sets the movement flag 10A indicating that the scroll corresponding key is in the pressed state to ON (step S3). Then, it is determined whether the display position is within the display area, that is, whether the cursor position can be moved within the currently displayed screen (step S4). If it is within the display area, the above steps S1 to S4 are repeated.

FIG. 3 is an explanatory diagram showing a scrolling state of such a display screen. In the figure, 100 is a display screen, 101 is text screen data, 102 is graphic screen data, and 103 is a cursor. Figure 3
The state of (a) is a state before screen scrolling, and the position of the cursor 103 is also on the left side of the screen. And
The state from FIG. 3A to FIG.
In the state of S4, in this case, the position of the cursor 103 is moved to the right, and the graphic screen data 10
2 is displayed as it is.

In step S4, if the cursor position is not within the display area, that is, if the cursor 103 is moved further to the right from the state of FIG. 3B, the display control means 34 is erasing the graphic screen. Whether or not it is determined based on the erase flag 10B (step S5). If the result of this determination is that the graphic screen is being displayed, the graphic screen display means 33 is instructed to erase the graphic screen, and the erase flag is set to ON (step S6). If the graphic screen is being erased, the text screen display means 32 is instructed to scroll the text screen as it is (step S7).

A display example by such processing is shown in FIG.
Is the state shown in. As shown, the display position has moved to the right by one character from the state of FIG. 3B, and the graphic screen data 102 has been deleted. Therefore, while the scroll-compatible key is continuously pressed, steps S1 to S1
Since the process of S7 is repeated, only the text screen moves. This is the state shown in FIG.

On the other hand, when the scroll-compatible key is no longer pressed, the continuous press recognition means 31 determines that the continuous press has been released. That is, when the code read from the keyboard buffer in step S1 is not the code of the scroll corresponding key or there is no code, the determination of the scroll corresponding key in step S2 becomes "NO", and the process proceeds to step S8. .

In step S8, the display control means 34
It is determined whether or not the movement flag 10A is ON, and if it is not ON, processing corresponding to the pressed key is performed. When the movement flag 10A is ON, it is determined whether the cursor position is within the display area (step S9). If it is outside the display area, the graphic screen has been erased, so the graphic screen display means 33 is instructed to display the graphic screen and the erase flag 10B is set to OFF (step S10). ). After that, the movement flag 10A is also turned off (step S1).
1) and returns to step S1. This is the state shown in FIG. 3E, in which the data on the right side of the text screen data 101 is displayed, and the graphic screen data 102 is also displayed.

If the cursor position is within the display area in step S9, the graphic screen data 102 is also displayed on the display screen 100. Therefore, the movement flag 10A is set to 0 in step S11.
Set to FF and return to step S1.

In the above embodiment, the case where the scroll of the display screen 100 is performed by the movement key of the cursor 103 has been described. The same can be done with (CR key) or the like.

[0022]

As described above, according to the screen scrolling method of the present invention, when scrolling a display screen in which a text screen and a graphic screen are mixed, the graphic screen is erased and only the text screen is scrolled.
Since the graphic screen is displayed when the scrolling instruction is stopped, the scrolling can be performed at high speed and the flicker of the screen during scrolling can be reduced, resulting in improvement of the user interface. You can

[Brief description of drawings]

FIG. 1 is a flow chart for explaining a screen scroll method of the present invention.

FIG. 2 is a block diagram showing a system configuration for implementing the screen scrolling method of the present invention.

FIG. 3 is an explanatory diagram showing a scrolling state of a display screen in the screen scrolling method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 display part 2 keyboard 3 control part 31 continuous pressing recognition means 32 text screen display means 33 graphic screen display means 34 display control means 10A movement flag 10B deletion flag

Claims (1)

[Claims] 1. A screen scroll method for displaying data in which text data and graphic data are mixed and scrolling the display screen. When scrolling is instructed, the graphic screen is erased and only the text screen is scrolled. The screen scroll method is characterized in that the graphic screen is displayed when the scroll instruction is stopped.