JPS61131025A - Pattern inputting system of graphic display device - Google Patents

Abstract

PURPOSE:To draw a rubber band line through simple operations, by distinguishing a starting point and ending point from each other by the coordinate inputting times from a tablet ot a device and drawing the rubber band line from plural starting points to the current cursor location. CONSTITUTION:When coordinates are inputted with a pen from a tablet, it is discriminated whether the pen is under an ON-condition or OFF-condition. When it is the first 'pen ON', the current cursor location is used as the starting point and, if it is the second 'pen ON', the current cursor location is used as the ending point. Then, if a starting point exists, the rubber band line between the starting point and current cursor location is updated and, when an ending point exists, the rubber band line between the ending point and current cursor location is updated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a graphic input method for a graphic display device, and more particularly to a rubber band starting point input method.

[Technical Background of the Invention] Conventionally, there is a rubber band as one of the graphic input functions of a graphic display device. This rubber band function is used when creating a circuit diagram, when two figures (for example, an IC)
When connecting between the two, it may be difficult to connect them with a straight line due to the relationship with other shapes, and it is necessary to connect while avoiding other shapes, and when connecting by trial and error while looking at the screen. This is a useful function.

As shown in Fig. 6, this rubber band is created when a starting point B is given from a host computer or a graphic display device, and from this starting point B to the current cursor position.
The rubber band line R is drawn up to the point where the cursor moves as shown by the arrow in the figure and reaches position 2, and even after reaching the position, the rubber band line R continues to be drawn. Conventionally, when the above-mentioned rubber band function is turned on, when a starting point is given by inputting coordinates using a mouse, pen, etc. from a coordinate input device such as a tablet (such coordinate input operation is called an event), this A rubberband line is drawn from the starting point to the current cursor, implementing the rubberband function. By the way, after first inputting coordinates and drawing a rubber band line as described above, when coordinates are input next (by pen-on, etc.), new coordinates are input from the first coordinate input point B1 as shown in Fig. 7. The rubber band line up to B2 is left behind.
Rubber band lines R up to 3 are drawn at the current cursor position with this B2 as a new starting point. In this case as well, the rubber band line R continues to be drawn from the starting point B2 to the cursor while the cursor moves from 3 to 4 and even after the cursor moves.

[Problems with the Background Art] By the way, in the conventional starting point input method (graphic input method) as described above, a function is provided in which multiple starting points are set and a rubber band line is drawn from each of these starting points at the current cursor position. It was impossible to realize this, and its functionality was limited. In order to avoid this drawback, as shown in FIG.
There is a method in which BS is given in advance and multiple rubber band lines R1, R2, R3 are drawn from each of these starting points to the cursor position 5. In this method as well, the cursor moves from the 5 position to the 6 position. All the rubber band lines mentioned above continue to be drawn. However, this method has the disadvantage that the starting point must be specified one by one, making the operation complicated. [Object of the Invention] In view of the above disadvantages, the present invention has been developed to To provide a graphic input method for a graphic display device that allows rubber band lines to be drawn with simple operations.

[Summary of the invention]
1. In a graphic display device having a rubber band function, the present invention distinguishes whether input coordinates are the first starting point, another starting point, or an update of the starting point, depending on the number of coordinate input events. An input coordinate determination means that draws a rubber band line from each input starting point to the current cursor position, and when the starting point is updated, a rubber band line is drawn between the new starting point and the old starting point. The above object is achieved by employing a figure input method for a graphic display device comprising a rubber band line drawing means that draws a rubber band line from the analysis starting point to the current cursor position while leaving the rubber band line. It is something.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a graphic display device to which the graphic input method of the present invention is applied.

Microprocessor that controls the entire device 1. A ROM 2 .in which a program for operating the microprocessor 1 is stored. RAM3, which is working memory. A tablef 842, which is a type of input device;
It is connected to the. A CRT 9 is connected to the screen memory 7, and the contents of the screen memory 6 are displayed on the screen of the CRT 9.

FIG. 2 is a schematic diagram showing a detailed example of the RAM 3 shown in FIG. 1. The RAM 3 has a starting point coordinate storage area 31. End point coordinate storage area 32. A current cursor position storage area 33 and a pen-on count (same as the event count) storage area 34 are provided.

Next, the operation of this embodiment will be described with reference to a flowchart shown in FIG. 3 showing the rubber band processing operation of the microprocessor 1 of FIG. 1. When coordinates are input using a pen, mouse, etc. from the tablet 4 shown in FIG. 1, the status is checked at step 101 in FIG. 3 to determine whether the pen is on or off. .

Here, if the pen is in the off state, step 102
to determine whether there is a starting point. If there is no starting point, the operation ends; if there is a starting point, the process goes to step 103, where the previous rubber band line is erased and a new rubber band line is drawn between the starting point and the current cursor. After that, the process goes to step 104 and determines whether there is an end point (second starting point). If there is no end point, the operation is ended, and if there is, the process goes to step 105. In this step 105,
A new rubber band line is drawn between the end point and the current cursor position, and the operation ends. Note that step 102~
The process of step 105 will be referred to as the process of part A hereinafter.

If it is pen-on in step 101, step 1
06, and it is determined whether or not the above-mentioned pen-on is the first time. If it is the first time, the fourth
As shown in the figure, the current cursor position is set as the starting point B1, and the process moves to section A. Thereafter, by the process in part A, a rubber band line is drawn from the starting point B1 to 1 at the current cursor position. Hereinafter, the processing in steps 106 and 107 will be referred to as 8 parts of processing. Next, in order to determine the end point (second starting point), the operator moves the pen on the tablet shown in FIG. 1 to bring the cursor to the end point position. During this time, the rubber band line is updated by the processing in section A above. Once the end point position is determined, the pen is pressed here and the pen is turned on. Therefore, in step 101, it is determined whether the pen is on, and since it is in the pen-on state, in step 106, the 1
It is determined whether this is the pen-on state for the second time, and since it is not the first time, it is determined at step 108 whether it is the second pen-on state. In this case, since this is the second pen-on state, the process goes to step 109, where the point where the pen is pressed is determined to be the end point B2 as shown in FIG. 4, and the process moves to section A. As shown in FIG. 4, the processing in part A draws rubber band lines R1 and R2 between the starting point (first starting point>81), the ending point (second starting point) 82, and 'l' at the current cursor position. If you move the cursor from position 1 to position 2 in such a state, rubber band lines R1 and R2 will continue to be drawn from both starting points 81 and 11 points B2 during and after this movement. Move to position 2.

The processing in steps 108 and 109 is referred to as 0 copy processing.

After moving the cursor to position 2, if you want to keep the rubber band line between the starting point B1 and the cursor position fixed, set the cursor to the pen-on state at position 2. Then, in step 101 of FIG. 3, it is determined whether the pen is on or not. Since the pen is on, step 106 is performed.
It is determined whether the pen-on is the first time or not. Since it is not the first time, it is determined in step 108 whether or not it is the second time. Since it is not the second time, the process goes to step 110.

In this step 110, as shown in FIG. 5, a process is performed to fix and leave the rubber band line R1 from the starting point B1 to the cursor position 2, and the process proceeds to step 111. In this step 111, processing is performed to set 2 at the cursor position as a new starting point B3, and then the processing moves to section A. Through the processing of part A, new starting point B3 and ending point B2 are created as shown in FIG.
Rubber band lines R3 are drawn from 3 to 3 at the current cursor position, and these rubber bands! R3 and R2 continue to be drawn while the cursor moves to position 4 and thereafter. Step 11o above.

1] The process of 1 is referred to as the process of part D.

In the above operation, the microprocessor 1 stores the starting point B1 or B3 in the pen coordinate storage area 31 of the RAM 3 shown in the diagram R2, the ending point B2 in the ending point coordinate storage area 32, and the current cursor position Kl, R2, R3 or 4 into the current cursor position storage area 32 and the number of pen-on times into the pen-on number storage area 34, or by reading the information from these areas, the rubber band process shown in the operation flow of FIG. 3 is performed.

According to this embodiment, the starting point (first starting point) and the ending point (second starting point) are distinguished from each other based on the number of pen-on times, and multiple starting points are easily υ
In addition, input can be made in a short time, and rubber band lines can be drawn from these multiple starting points to the current cursor position. Furthermore, since the starting point and the ending point are always related by the rubber band line, the relationship between the starting point and the ending point is clear, and a circuit diagram can be efficiently created using a CAD system or the like.

[Effects of the Invention] As described above, according to the graphic input method of the graphic display device of the present invention, coordinates are input from the tablet to the device by the number of times the pen is turned on.

By inputting multiple starting points separately and constantly drawing rubberband lines from these multiple starting points to the current cursor position, you can easily manipulate the rubberband line from multiple starting points to the current cursor position. There is an effect that can be drawn with.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a graphic display device to which the graphic input method of the graphic display device of the present invention is applied, and FIG. 2 is a block diagram of an RA shown in FIG.
A schematic diagram showing a detailed example of M3, FIG. 3 is a flowchart of the rubber band processing operation of the microprocessor shown in FIG. 1, and FIGS. 4 and 5 are rubber bands drawn by the graphic display device shown in FIG. 1. Figure 6 shows an example of drawing a rubber band line when there is one starting point using the graphic input method of a conventional graphic display device, and Figure 7 shows an example in which the starting point is updated in the diagram of Figure 6. FIG. 8 is a diagram showing an example of rubber band drawing when there are a plurality of starting points using a conventional graphic input method of a graphic display device. 1...Microprocessor 2...ROM3...
・RAM 4...Tablet 6...Screen memory 7...CRT Control D-La 9...CRT Attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In a graphic display device with a rubber band function, it is possible to determine whether the input coordinates are the first starting point or another starting point depending on the number of coordinate input events.
An input coordinate determination means for distinguishing between input coordinates and starting point updates; A graphic input device for a graphic display device, comprising: rubber band line drawing means for drawing a rubber band line from the new starting point to the current cursor position, leaving the rubber band line drawn between the starting point and the starting point. method.