JPH0527902B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention displays desired shapes such as circles, lines, symbols, etc. on a display screen according to a graphic program stored in a graphic description memory, and also identifies the desired shapes. The present invention relates to a display device having a figure selection function capable of selecting figures.

[Conventional technology]

As a conventional display device having a graphic selection function, there is one having the configuration shown in FIG. 3, for example.

This conventional example includes a CRT display 1 as a display section, a keyboard 2, a control section 3, a graphic description memory 4, a video memory 5, a screen display section 6, a pointing device 7, a graphic designation section 8, and a graphic description memory 4. Consists of a graphic program 9 written,
The control section 4 refers to a graphic program 9 to draw a desired graphic on the display screen of the CRT display 1.

By the way, the pointing device 7 is generally used to select, for example, one figure displayed on the display screen of the CRT display 1 in order to delete or change it. Here, specifically, a mouse, a joy stick, and a light pen are used as the pointing device 7, but the method of selecting a figure on the display screen of the CRT display 1 using these devices is almost the same. Here, they are collectively referred to as pointing devices.

Next, a method of selecting a figure using this pointing device 7 will be explained.

Normally, the display screen of CRT display 1 is vertical.
It is composed of a collection of small dots, roughly divided into two types: 400 x 640 dots horizontally and 200 x 640 dots horizontally, and the figures on the display screen of CRT display 1 are also drawn by connecting these dots. There is. Therefore, the control section 3 executes the process shown in FIG. 4 to select a figure.

That is, in each step, the pointing device 7 is used to point out a single dot or a plurality of dots.
It is determined whether a dot on the display screen of the CRT display 1 has been designated. At this time, if no dot is specified, the process waits until a dot is specified, and when a dot is specified, the process moves to step.

In this step, the correspondence relationship between the specified dots and the figures described in the figure program stored in the figure description memory 4 is referred to, and then the process moves to the step where the specified dots form a figure. Determine whether it is included in the dot. At this time, if the specified dots do not constitute a shape, the process returns to the step; if they do, the process moves to the step and determines that the shape containing the specified dots has been selected. Then, the figure designation process is performed and the process ends.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional display device having a figure selection function, since a figure is selected by specifying a dot, there is a problem that the figure specification becomes uncertain as described below.

In other words, when two shapes overlap, when one of the shapes is selected, they are both selected at the same time, or only one of them is selected, and the other cannot be selected. The dot was hot.

Furthermore, if the dot specified by the pointing device 7 is a single dot, if the specified dot deviates even slightly from the figure, it will no longer be possible to select it.
It is necessary to strictly specify the shape.

For this reason, when multiple dots are designated with the pointing device 7, it is possible to specify the shapes roughly to some extent without strictly specifying them, but on the other hand, if two shapes are close to each other, There was a problem that they were selected at the same time.

Therefore, the present invention has been made by focusing on the above-mentioned problems of the conventional example, and by displaying the figures stored in the figure description memory blinking one by one and making it possible to specify the figure at the time of blinking. It is an object of the present invention to provide a display device having a highly reliable graphic selection function that avoids erroneous designations.

[Means for solving problems]

In order to achieve the above object, the present invention provides a display device having a figure selection function for selecting an arbitrary figure in a state in which a plurality of figures are displayed in a superimposed manner. A figure display means for reading out one figure stored in a memory and displaying it so that it can be distinguished from other figures; and a figure display means for determining whether a next instruction command or a figure specifying command has been input while the figure display means is displaying the figure in a distinguishable manner. input determination means for making a determination; next figure display means for reading out and identifying and displaying another figure stored in a figure description memory when the determination result of the input determination means is a next instruction; and a determination by the input determination means. and figure specifying means for specifying a figure being identified and displayed as a selected figure when the result is a figure specifying command.

[Effect]

In this invention, one figure stored in the figure description memory is read out by the figure display means and displayed so as to be distinguishable from other figures, and when the next instruction command is input or a figure specifying command is input while the figure is being displayed in a distinguishable manner. When it is determined that the next instruction command has been input, the next figure display means identifies and displays another figure stored in the figure description memory, and it is determined that the figure specifying command has been input. At this time, by specifying the displayed figure as the selected figure by the figure specifying means, the figures stored in the figure description memory are sequentially identified and displayed one by one according to the next instruction command, thereby preventing incorrect selection of figures. Be sure to do it without specifying it.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

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

In the figure, 1 is a CRT display as a display section,
2 is a keyboard for inputting figure selection commands, 3 is a control unit that controls the entire display device, 4 is a figure description memory that stores a figure program 9 for drawing on the display screen of the CRT display 1, and 5 is a figure description memory.
Video memory 6 stores the states of dots on the display screen of CRT display 1 on a one-to-one basis.
A screen display section 8 is used to draw figures on the display screen of the CRT display 1, and 8 is a figure designation section that specifies figures on the display screen of the CRT display 1.

Then, the control unit 3 executes the figure selection process shown in FIG.

That is, it is determined in step whether or not the graphic display start key arranged on the keyboard 2 has been pressed. At this time, if the figure display start key is not pressed, the program waits until it is pressed, and when the figure display start key is pressed, the program moves to step and starts from the figure program 9 stored in the figure description memory 4. Select one of the shapes described in . Next, the process moves to step and the selected figure is displayed from the figure designation section 8 to the screen display section 6.
By sending out a flicker command, the specified figure is displayed on the display screen of the CRT display 1 by blinking (flickering) so that it can be distinguished from other figures.

Next, the process moves to step and it is determined whether or not the next instruction key arranged on the keyboard 2 has been pressed. In this case, the judgment is to determine whether or not to specify another figure following the first specified figure.If the next instruction key is pressed within a predetermined time, the process moves to the step and the figure program starts. 9
After selecting the figure described next above, the process returns to the step, and if the next instruction key is not pressed within a predetermined time, it is determined that no other figure is to be specified, and the process moves to the step.

In this step, it is determined whether or not to end the figure selection process. In this case, the determination is made based on whether or not the end key arranged on the keyboard 2 has been pressed, and if the end key has not been pressed, the process moves to step.

In this step, it is determined whether or not a specified key arranged on the keyboard 2 has been pressed. If the specified key has not been pressed, the process returns to the step, and if the specified key has been pressed, the process moves to the step.

In this step, the shape is identified and
Next, the process moves to step, where the blinking of the figure is stopped and the process is ended.

Further, if the determination result of the step is that the end key is pressed within a predetermined time, the process directly moves to the step, stops the blinking of the figure, and ends the process.

Here, the processing in step corresponds to the figure display means, the process in step , corresponds to the input judgment means, the process in step corresponds to the next figure display means, and the process in step corresponds to the figure identification means. ing.

Next, the operation of the above embodiment will be explained.

First, a graphic display start key placed on the keyboard 2 is pressed. As a result, an output signal corresponding to the graphic display start key is input to the control section 3, so that the control section 3 starts executing the graphic selection process shown in FIG. 2.

Therefore, the graphic program 9 stored in the graphic description memory 4 is accessed and the first described graphic is selected (step).

Next, a flicker display command for the selected figure is sent from the figure specifying section 8 to the screen display section 6 to cause the selected figure to be displayed as a flicker on the display screen of the CRT display 1.

At this time, if the figure being flickered is different from the desired figure, the next instruction key arranged on the keyboard 2 is pressed.

By pressing the next instruction key, keyboard 2
Since the output signal corresponding to the next instruction key is input to the control section 3, the control section 3 selects the second figure described in the figure program 9 stored in the figure description memory 4 (step ), this figure is displayed as a flicker on the display screen of the CRT display 1 (step).

Then, the figure displayed on the flicker display is the desired figure, and in order to designate it, the user presses the instruction key arranged on the keyboard 2 without pressing the next instruction key and the end key. This allows you to determine that you have specified the figure that is displayed as a flicker (step,
). Therefore, the flicker display of the figure is stopped (step) and the figure selection process is ended.

On the other hand, if the figure selection process is to be terminated without specifying a figure while the figure is displayed in a flickering manner, the end key placed on the keyboard 2 is pressed. As a result, an output signal corresponding to the end key from the keyboard 2 is transmitted to the control unit 3.
In response to this input, the flicker display of the figure is stopped (step) and the figure selection process is completed.

In this way, when a desired figure is displayed as a flicker on the display screen of the CRT display 1, by pressing the designation key, you can specify the figure displayed as a flicker. Even if the shapes overlap or are close to each other, it is possible to reliably specify only one desired shape.

In the above embodiment, a case has been described in which a figure read from the figure description memory is displayed in a flickering manner. However, the present invention is not limited to this, and a specified figure may be displayed in a specific color for identification. good.

Furthermore, in the above embodiment, as a display section,
Although the case where the CRT display 1 is applied has been described, the present invention is not limited to this, and it goes without saying that other display units such as a liquid crystal display device can be applied.

Further, in the above embodiment, a case has been described in which the selection and designation of a figure is instructed by pressing a specific key on the keyboard 2, but the present invention is not limited to this, and the selection and designation displayed on the CRT display 1 Instruct the mark with a light pen,
The instructions may be given using a mouse or the like.

〔Effect of the invention〕

As explained above, according to the present invention, figures are displayed one by one on the display section in the order of description in the figure description program stored in the figure description memory, and the figures that are being identified are Since the configuration is configured such that the figure selection function of the display device is specified by an instruction from the input device, the reliability of the figure selection function of the display device can be improved, and cases where a figure cannot be specified or a figure is specified by mistake can be avoided. It is possible to reliably avoid the problem, and the graphic selection operation can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing an example of figure selection processing by the control section, FIG. 3 is a block diagram showing a conventional example, and FIG. 4 is a block diagram showing an example of a conventional example. 7 is a flowchart showing figure selection processing. In the figure, 1 is a CRT display, 2 is a keyboard, 3 is a control unit, 4 is a graphic description memory, 5 is a video memory, 6 is a screen display unit, 8 is a graphic designation unit, 9
is a graphics program.

Claims (1)

[Claims] 1. In a display device having a figure selection function for selecting an arbitrary figure in a state in which multiple figures are displayed in a superimposed manner, when a figure selection start command is input, one figure stored in the figure description memory is read out and another figure is read out. A figure display means for displaying a figure so as to be distinguishable from the figure; an input determination means for determining whether a next instruction command or a figure specifying command has been input while the figure display means is displaying the figure in a distinguishable manner; and the input determination means a next figure display means for reading and identifying another figure stored in the figure description memory when the determination result of the input determination means is a next instruction command; 1. A display device having a graphic selection function, comprising: a graphic specifying means for specifying a graphic that is displayed as a selected graphic.