JP2013088891A - Information terminal, drawing control program, and drawing control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize handwriting input having good appearance by simple operation.SOLUTION: An information terminal having a touch panel capable of detecting a touch position and disposed on a display unit, includes a data processing unit having: a function to identify the movement locus of a touch position on the basis of a signal output from the touch panel and to draw or delete a line defined by the movement locus; and a function to process the shape of an end portion of the line being drawn or deleted on the basis of a touch state in the vicinity of a position where a touch is finished, when the touch is finished. When a single touch is performed, the processed shape of the end portion is determined on the basis of change in at least one of the movement direction, movement speed, and movement acceleration of a touch position in the vicinity of a position where the touch is finished. When a multi-touch is performed, a line is extrapolated so as to extend from each position where each touch is finished on the basis of the movement locus of a touch position in the vicinity of the position where the touch is finished.

Description

  The present invention relates to an information terminal, a drawing control program, and a drawing control method, and more particularly to an information terminal provided with a touch panel, a drawing control program for controlling drawing on the touch panel, and a drawing control method.

  In recent years, information terminals having a touch panel on a display unit such as a smartphone or a tablet terminal have become widespread. In this information terminal, handwriting input such as drawing or erasing lines can be performed by touching and sliding a finger or a touch pen on the touch panel. In addition, on a touch panel capable of multi-touch, handwriting input such as filling a region surrounded by a plurality of lines or erasing information in the region by sliding a plurality of fingers or a touch pen is possible. it can.

  Although it is not a technology related to an information terminal provided with a touch panel, as a technology related to handwriting input, Japanese Patent Application Laid-Open Publication No. 2004-228688 discloses that when a pen switch shifts from on to off, an infrared signal and an ultrasonic wave are set within a preset time. An electronic pen provided with the control means, and a function of continuously changing the transmission period of the infrared signal and the ultrasonic signal, and at least one infrared light receiving unit; , Having two or more ultrasonic receivers, the infrared ultrasonic measurement unit for measuring the arrival time difference between the infrared signal and the ultrasonic signal, and using the arrival time difference obtained from the infrared ultrasonic measurement unit A handwriting handwriting input system comprising a coordinate calculation unit that calculates position coordinate data of an electronic pen and a conversion processing unit that converts the position coordinate data of the electronic pen into handwriting data is opened. It is.

  In addition, as a technique related to a pen for handwriting input, Japanese Patent Application Laid-Open No. 2004-26853 discloses that handwriting input is performed in a handwriting information input device that detects handwriting information accompanying handwriting when handwriting input is performed. A plurality of sensors (acceleration sensor and angular velocity sensor) for detecting handwritten information about the movement of the drawing point, and the handwritten information detected by the sensor (acceleration information detected by the acceleration sensor and angular velocity information detected by the angular velocity sensor) The structure provided with the memory | storage means which memorize | stores and the handwritten information reading means for reading the said handwritten information memorize | stored by the said memory | storage means outside is disclosed.

  In Patent Document 3 below, when it is determined that the pen tip is in contact with the writing target medium, the parameter variation estimation unit is drawing when the pen tip is in contact with the writing target medium. Based on the information from the pen tip behavior detector that calculates the pen tip speed and calculates the pen tip position, the parameter fluctuation amount in the acceleration sensor and the gyro sensor is estimated, and the handwriting calculation unit based on the estimated parameter fluctuation amount A technique for correcting a writing locus calculated based on information obtained by an acceleration sensor and a gyro sensor is disclosed.

JP 2007-128120 A JP 2003-114754 A JP 2009-223839 A

  The conventional handwriting input is intended to accurately read the movement locus of the position (touch position) touched (touched or pressed) on the touch panel, so that the movement locus of the touch position is directly drawn on the screen. However, since handwritten input is characterized by simply drawing characters and figures, if the movement locus of the touch position is drawn as it is, the appearance of the handwritten characters and figures may deteriorate. For example, the character expresses "Splash" that jumps up the end of the stroke, "Hara" that stretches the end of the stroke, "Stop" that stops the stroke, etc. at the end of each line that makes up the character This will improve the appearance, and illustrations and other figures will look better by expressing `` Harai '' and `` Tome '', but it is difficult to realize such fine expressions with handwriting input. I can't draw characters and figures that I drew.

  Further, in the conventional handwriting input, a series of movement trajectories from the position where the finger or the touch pen is in contact with the touch panel is drawn as one figure, so when drawing one continuous character or figure , You must maintain the touch state. Therefore, when a finger or a touch pen is unintentionally separated from the touch panel, it cannot be drawn as one continuous figure, and the appearance is deteriorated. Further, when the finger or the touch pen is moved quickly on the touch panel, the touch state may not be detected. In such a case, it is not possible to draw as one continuous figure, and the appearance is deteriorated.

  The present invention has been made in view of the above problems, and its main purpose is to provide an information terminal, a drawing control program, and a drawing control method capable of realizing a good-looking handwriting input with a simple operation. There is to do.

  In order to achieve the above object, the present invention provides an information terminal including a touch panel capable of detecting a touch position on a display unit, specifies a movement locus of the touch position based on a signal output from the touch panel, and moves the movement. The shape of the end of the line being drawn or erased is processed based on the function that draws or erases the line defined by the locus and the touch state near the position where the touch is released when the touch is released And a data processing unit having a function to perform.

  Further, the present invention is a drawing control program that operates on an information terminal including a touch panel capable of detecting a touch position on a display unit, and the information terminal is configured to detect the touch position based on a signal output from the touch panel. Drawing or erasing based on the function of specifying the movement trajectory and drawing or erasing the line defined by the movement trajectory and the touch state near the position where the touch is released when the touch is released And a data processing unit having a function of processing the shape of the end portion of the line.

  Further, the present invention is a drawing control method in an information terminal including a touch panel capable of detecting a touch position on a display unit, wherein the movement locus of the touch position is specified based on a signal output from the touch panel, Based on the first step of drawing or erasing the line defined by the movement trajectory and the touch state near the position where the touch is released when the touch is released, the end of the line being drawn or deleted And a second step of processing the shape.

  According to the information terminal, the drawing control program, and the drawing control method of the present invention, a good-looking handwriting input can be realized with a simple operation.

  The reason for this is that an information terminal (drawing control program) equipped with a touch panel has a touch state in the vicinity of the position where the touch is released (change in moving direction of the touch position, change in moving speed) when a finger, a touch pen, or the like moves away from the touch panel. This is because, based on the movement acceleration change, the movement trajectory, and the like, a processing method for the end portion of the movement trajectory is determined, and control for processing the end portion into a predetermined shape is performed according to the determined processing method.

It is a perspective view which shows typically the external appearance of the information terminal which concerns on one Example of this invention. It is a block diagram which shows the structure of the information terminal which concerns on one Example of this invention. It is a figure explaining an example (in the case of a single touch) of drawing control operation concerning one example of the present invention. It is a figure explaining an example (in the case of multi-touch) of drawing control operation concerning one example of the present invention. It is a figure explaining other examples (in the case of multi-touch) of drawing control operation concerning one example of the present invention. It is a flowchart figure which shows the drawing control operation | movement (control which processes a termination | terminus part) using the information terminal which concerns on one Example of this invention. It is a figure explaining an example (when connecting a line) of drawing control operation concerning one example of the present invention. It is a flowchart figure which shows the drawing control operation | movement (operation | movement which connects a line) using the information terminal which concerns on one Example of this invention.

  As shown in the background art, when drawing a line on the touch panel, the finger or touch pen is slid, but in conventional handwriting input, the position where the finger or touch pen is separated from the touch panel is the end of the line. It is difficult to draw such characters and figures (reproduced characters and figures such as “Hane”, “Harai”, “Tome”) and the appearance deteriorates.

  In addition, in the conventional handwriting input, a series of movement trajectories from the position where the finger or the touch pen is touched to the touch panel is drawn as one figure, and thus the finger or the touch pen is unintentionally separated from the touch panel. In some cases, or when the device cannot detect a touch state, there is a problem in that it cannot be drawn as a single continuous graphic and the appearance deteriorates.

  Therefore, in an embodiment of the present invention, in an information terminal including a touch panel, when a finger, a touch pen, or the like is separated from the touch panel, the processing of the end portion of the movement track is performed based on the touch state in the vicinity of the position where the touch is released. A method is determined, and control for processing the end portion into a predetermined shape is performed according to the determined processing method.

  Specifically, in an information terminal including a touch panel capable of detecting the touch position on the display unit, the touch position is specified based on a signal output from the touch panel, and a line is drawn based on the movement locus of the touch position. Or, when a finger or a touch pen moves away from the touch panel, it detects the distance (change in the direction of movement of the touch position, change in moving speed / acceleration, change in pressing force, movement trajectory, etc.) Then, the drawing or erasing method on the extension line of the end portion of the line being drawn or erased is determined according to the distance, and the drawing or erasing is controlled according to the determined method.

  Thereby, it is possible to draw a good-looking character or figure with a simple operation. In particular, by applying the above method to the drawing of characters, it is possible to accurately reproduce the characters “Hane”, “Haraai”, and “Tome”, and to greatly improve the appearance of handwritten input characters. .

  In order to describe the above-described embodiment of the present invention in more detail, an information terminal, a drawing control program, and a drawing control method according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view schematically showing the appearance of the information terminal of this embodiment, and FIG. 2 is a block diagram showing the configuration of the information terminal. FIGS. 3 to 5 are diagrams showing an example of the drawing control operation of the information terminal according to the present embodiment (operation for processing the terminal portion), and FIG. 6 is a flowchart showing the procedure of the drawing control operation. is there. FIG. 7 is a diagram showing an example (operation for connecting lines) of the drawing control operation of the information terminal of this embodiment, and FIG. 8 is a flowchart showing the procedure of the drawing control operation.

  As shown in FIG. 1, the information terminal 100 according to the present embodiment is a device having a display function such as a notebook computer device, a tablet terminal, electronic paper, or an electronic book. In the following embodiment, an information terminal 100 that can be input and displayed will be described as an example of the information terminal. However, the information terminal of this embodiment does not necessarily have a display function and uses a touch panel. Any device that can input information can be used.

  As shown in FIG. 2, the information terminal 100 includes a CPU (Central Processing Unit) 101, a memory 102, a display unit 103, a display controller 104, an operation unit 105, a communication unit 106, a battery 107, a data processing unit 108, and the like. Is done.

  The CPU 101 executes an input control program read from the memory 102 and functions as a control unit that controls the operation of each unit.

  The memory 102 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. Various programs that operate on the CPU 101, setting information for controlling the operation of the information terminal 100, various data (for example, preset) Information defining the shape of the terminal portion, information for identifying the user, document data) and the like are stored.

  The display unit 103 includes a liquid crystal display (LCD), an organic EL (electroluminescence) display, electronic paper (EPD), and the like, and displays drawn lines and figures. Electronic paper has a transparent conductive electrode formed on the inner surface of a pair of transparent film substrates, and a conductive black toner and an electrically insulating white toner are sealed between the electrodes, and a voltage is applied between the electrodes. When the toner is applied, the black toner moves and replaces the white toner to change the color.

  The display controller 104 drives the display unit 103 and controls the display on the display unit 103 in accordance with an instruction from the CPU 101.

  The operation unit 105 is a pressure-sensitive or capacitive touch panel or the like in which transparent electrodes are arranged in a grid pattern on the front surface or the back surface of the display unit 103. The transparent electrode is disposed on a portion touched with a finger or a touch pen. Is sent to the CPU 101 and the data processing unit 108. In addition, the touch panel of a present Example shall be able to process a signal from a some transparent electrode simultaneously (it is equipped with what is called a multi-touch function).

  The communication unit 106 is a NIC (Network Interface Card), a modem, or the like, and communicates with a computer device or server connected to the network by wired communication or wireless communication, and receives document data and the like.

  The battery 107 is a secondary battery that supplies power for driving each part of the information terminal 100.

  The data processing unit 108 processes a signal output from the operation unit 105 (touch panel) and specifies a touch position. When touching at one or a plurality of positions and moving at least one touch position, lines are drawn or erased based on the movement trajectory of each line. Also, when a finger or touch pen is released from the touch panel, it detects how it is released (changes in the direction of movement of the touch position, changes in movement speed / acceleration, changes in pressure, movement trajectory, etc.) The drawing or erasing method on the extension line of the end portion of the line being drawn or erased is determined according to, and the drawing or erasing is performed according to the determined method. The data processing unit 108 may be configured as hardware or software (a drawing control program that operates on the CPU 101).

  Note that FIG. 2 is an example of the information terminal 100 according to the present embodiment, and the configuration thereof can be changed as appropriate.

  Next, drawing control when handwritten input is performed using the information terminal 100 having the above configuration will be specifically described with reference to the drawings.

  Conventionally, when a line is drawn by sliding a finger or touch pen on the touch panel, the position where the finger or touch pen is separated from the touch panel from the position where the finger or touch pen is touched on the touch panel (hereinafter referred to as the touch start position). The movement locus of the touch position up to (hereinafter referred to as the touch end position) is drawn as a line.

  However, handwriting input is intended to easily input characters and figures, and it is difficult to input characters and figures accurately, so that there is a problem that the appearance of characters and figures input by handwriting deteriorates. For example, characters can be made to look good by expressing “Hane”, “Harai”, “Tome”, etc. at the end of the line, and illustrations such as “Harai”, “Tame” However, in handwriting input, it is difficult to move a finger or a touch pen finely, so that it is not possible to draw a good-looking character or figure.

  Therefore, in this embodiment, when the finger or the touch pen is released from the touch panel, the data processing unit 108 detects the release based on the touch state in the vicinity of the touch end position, and the line is changed according to the release. The end part is automatically processed so that “hello”, “hari”, “stop”, etc. can be expressed.

  Specifically, as shown in FIG. 3A, when a finger is moved on the touch panel, a line having a width indicated by a thin line in the figure is drawn along the movement locus (thick line in the figure). Then, the end shape of the line is processed according to the touch state in the vicinity of the touch end position (how to release the previous finger from the touch position indicated by the black circle in the figure).

  For example, when the touch position moves upward in the vicinity of the touch end position, it is determined that the action is “splash”, and the end portion of the line is moved upward as shown in FIG. And gradually reduce the width of the line. At this time, the amount of change in length and width extending upward is changed according to the moving speed and moving acceleration of the touch position that moves upward. For example, as the moving speed or moving acceleration of the touch position increases, the length extending upward is increased or the amount of change in width is increased.

  Further, when the touch position moves in the extension line direction of the movement locus in the vicinity of the touch end position, it is determined that the operation is “Harai”, and as shown in FIG. Is extended in the direction of the extension line, and the width of the line is gradually reduced. At that time, the amount of change in length and width extending in the extension line direction is changed according to the movement speed and movement acceleration of the touch position moving in the extension line direction of the movement locus. For example, as the moving speed or moving acceleration of the touch position increases, the length extending in the extension line direction is increased, or the change amount of the width is increased.

  Further, when the touch position is stationary in the vicinity of the touch end position, it is determined that the operation is “stop”, and the end portion of the line is thickened as shown in FIG. At that time, the degree of fattening is changed in accordance with the moving speed and moving acceleration of the touch position immediately before it stops. For example, the fattening increases as the stationary time or the stationary time increases.

  When a pressure-sensitive touch panel is used, the shape of the end portion of the line is changed according to the change in the pressing force. For example, as shown in FIG. 3C, when the pressing force suddenly decreases with respect to the movement of the touch position, the sizes of “Splash”, “Harai”, and “Tome” are reduced (“Splash”). ”Or“ Harai ”or“ Tame ”is shortened, and the size of“ Splash ”,“ Harai ”, or“ Tame ”increases as the pressure changes more slowly. (The length of “Hane” or “Harai” is increased, or the size of “Tome” is increased).

  In this way, the shape of the end portion of the line is processed based on the touch state in the vicinity of the touch end position (change in moving direction of the touch position, change in moving speed, change in moving acceleration, change in pressing force, etc.) Thus, it is possible to draw characters and figures as if drawn with a brush, and improve the appearance of the characters and figures.

  FIG. 3 is an example of touching with one finger or a touch pen (single touch), but when a thick line or region is drawn with a plurality of fingers or touch pens using a touch panel capable of multi-touch, This will be described below.

  When drawing a thick line or region, a method is used in which a plurality of (for example, two) fingers or a touch pen are slid on the touch panel to fill a closed curved surface specified by the plurality of lines. In this method, as shown in FIG. 4A-1, a position from a position where the finger or touch pen is touched on the touch panel (touch start position) to a position where the finger or touch pen is separated from the touch panel (touch end position) is connected. A closed curved surface specified by a plurality of lines, a line connecting a plurality of touch start positions, and a line connecting a plurality of touch end positions is filled with a thick line. Further, as a method of processing the shape of the terminal portion, as shown in FIG. 4A-2, a plurality of touch end positions are connected by an arc to round the terminal portion, or FIG. As shown in FIG. 5, there is a method of sharpening the end portion by extending a line linearly in the acceleration direction from each touch end position.

  However, these methods have a problem in that it is not possible to accurately represent “hane”, “hari”, and “stop”. Therefore, in this embodiment, when a thick line or region is drawn by multi-touch, the tip is drawn from the touch end position based on the movement locus of the touch position near the touch end position of each line.

  Specifically, as shown in FIG. 4B-1, when a line is drawn with two fingers, the movement locus is a straight line based on the movement locus of the touch position near the touch end position of each line. In the case of, the straight line is extended. When the movement locus is a curve, the curve is extended while maintaining the curvature of the curve, and the drawing is performed up to the position where the extended lines intersect. Also, as shown in FIG. 4B-2, when the finger is released from the touch panel, the touch position is not moved in the horizontal direction (moved on the touch panel surface), but is moved only in the vertical direction (direction away from the touch panel). In this case, a plurality of touch end positions are connected with a predetermined figure to make the end portion a certain shape. Then, if necessary, an area specified by a plurality of lines is filled.

  In this way, when a thick line or region is drawn with a plurality of fingers or a touch pen, each line is extended to the intersection point based on the movement locus of the touch position near the touch end position of each line, or the touch end position When it is lifted from the touch panel, it is possible to draw a good-looking character or figure by processing the end portion into a predetermined shape.

  FIG. 4 shows a case where the two lines gradually approach and intersect on the extension line. However, the present embodiment is also applied to the case where the two lines are gradually separated and do not intersect on the extension line. The example drawing control method can be applied.

  For example, when two lines are drawn so that the interval gradually increases, conventionally, as shown in FIG. 5 (a-1), the touch end position is left as it is without processing, or FIG. As shown in (a-2), any method of connecting the touch end positions of two lines with a straight line has been used.

  On the other hand, in this embodiment, as shown in FIG. 5 (b-1), when the movement locus is a straight line based on the movement locus of the touch position in the vicinity of the touch end position of each line, the straight line is changed. It is extended by a predetermined length, or when the movement locus is a curve, it is extended by a predetermined length while maintaining the curvature of the curve. Further, as shown in FIG. 5B-2, a plurality of touch end positions are connected with a predetermined figure, and an area specified by a plurality of lines is filled as necessary. By performing such drawing control, it is possible to draw a good-looking character or figure.

  The plurality of fingers and the touch pen do not need to be separated from the touch panel at the same time, and can be separated separately. In this case, after all the touches are released, the above-described drawing control may be performed based on the movement locus in the vicinity of the touch end position of each line. Also, in the above, after the termination of a plurality of lines, the area (closed curved surface) specified by the plurality of lines is filled as necessary, but a line connecting the touch positions of the plurality of lines is drawn. However, it can be painted in the same way by performing termination processing.

  Next, the shape of the end part of the line is processed based on the touch state in the vicinity of the touch end position (change in moving direction of touch position, change in moving speed / acceleration, change in pressing force, moving locus of touch position) The procedure to do is demonstrated with reference to the flowchart figure of FIG.

  First, as shown in FIG. 6, when the user moves one or more fingers or a touch pen on the touch panel of the information terminal 100, the data processing unit 108 processes the output signal of the touch panel to identify the touch position, Normal drawing is performed based on the movement locus of the touch position (S101). Next, the data processing unit 108 determines whether any touch position has reached the end point (S102). If any touch position has not reached the end point, the movement locus of the touch position is approximated by a curve ( S103), returning to S101 and continuing normal drawing.

  If any touch position reaches the end point, the data processing unit 108 determines whether there is a horizontal acceleration at the end point (S104). When there is a horizontal acceleration, the data processing unit 108 extrapolates from the immediately preceding approximate curve and draws a trajectory (S105). Then, the data processing unit 108 determines whether all touch positions have reached the end point (S106). If there is any touch position that has not reached the end point, the process returns to S105 and the same processing is repeated, and all the touch positions are determined. When the end point is reached, the end part is drawn based on a change in the movement direction of the touch position at the end point, a change in movement speed, a change in movement acceleration, a change in pressing force, a movement locus, or the like, or according to a predetermined method. Processing is performed (S107).

  In S104, when there is no horizontal acceleration at the end point, the data processing unit 108 stops the locus (S108), and determines whether there is another moving touch position (S109). If there are other moving touch positions, the process returns to S101 and the same processing is repeated. If there is no other moving touch position, the movement direction of the touch position at the end point, the movement speed, Based on the change in the movement acceleration, the change in the pressing force, the movement locus, or the like, or in accordance with a predetermined method, the drawing process of the terminal portion is performed (S110).

  Thus, by processing the shape of the end of one or a plurality of lines based on the touch state near the touch end position, it is possible to draw a good-looking character or figure. Also, when multiple lines are drawn with multiple fingers or touch pens, the line is extended from the touch end position based on the touch state near the touch end position of each line, or the end portion is processed into a predetermined shape. By doing this, it is possible to draw characters and figures that look good.

  As described above, the drawing processing of the terminal portion of one or a plurality of continuous lines has been described. For example, when the finger or the touch pen is unintentionally separated from the touch panel or when the finger or the touch pen is moved quickly on the touch panel When the terminal 100 cannot detect the touch state, it cannot be drawn as one continuous graphic, and the appearance is deteriorated.

  In such a case, by using a method of extrapolating the trajectory from the approximate curve, it is possible to draw a fragmented line as a connected line. For example, as shown in FIG. 7, when a line is drawn intermittently, by extending the line using a method of extrapolating the trajectory from the approximate curve to the end portion of each line fragment, Each piece can be joined to the previous piece, and as a result, a single continuous line can be drawn. The drawing operation of the information terminal 100 in this case will be described with reference to the flowchart of FIG.

  First, as illustrated in FIG. 8, when the user moves one or more fingers or a touch pen on the touch panel of the information terminal 100, the data processing unit 108 processes the output signal of the touch panel to identify the touch position, Normal drawing is performed based on the movement locus of the touch position (S201). Next, the data processing unit 108 determines whether the touched point has been released (S202). If not released, the process returns to S201 to continue normal drawing. If released, the data processing unit 108 has been touched again within a predetermined time (or a predetermined time). And whether or not a position within a predetermined distance range has been touched) (S203).

  When touched again within the specified time (or within the specified time and within the specified distance range), the data processing unit 108 approximates the trajectory and draws it without any interruption (S204). Returning to S201, the same processing is repeated. On the other hand, if the touch is not made again within the specified time (or within the specified time and within the specified distance range), the data processing unit 108 moves the touch position at the end point as described above. Based on the change in direction, the change in moving speed, the change in moving acceleration, the change in pressing force, the moving locus, or the like, or in accordance with a predetermined method, the drawing process of the end portion is performed (S205).

  In addition, this invention is not limited to description of the said Example, As long as it does not deviate from the meaning of this invention, the structure and control can be changed suitably.

  For example, in the above description, the case of drawing a line or filling an area has been described, but the same applies to the case of deleting a previously drawn line or deleting information in the area. can do.

  In the above description, the pressure-sensitive touch panel is used to change the touch pressing force, but the touch position moving direction, moving speed, and moving acceleration change without using the touch pressing force. When using only the movement trajectory, an electrostatic touch panel can be used.

  The present invention can be used for an apparatus including a touch panel, a program that operates on the apparatus, and a method for controlling touch panel input.

100 Information terminal 101 CPU
DESCRIPTION OF SYMBOLS 102 Memory 103 Display part 104 Display controller 105 Operation part 106 Communication part 107 Battery 108 Data processing part

Claims (18)

In an information terminal including a touch panel capable of detecting a touch position on a display unit,
A function that identifies the movement locus of the touch position based on a signal output from the touch panel and draws or erases a line defined by the movement locus, and the vicinity of the position where the touch is released when the touch is released A data processing unit having a function of processing the shape of the terminal portion of the line being drawn or erased based on the touch state of
An information terminal characterized by that. When the touch panel is touched at one point,
The data processing unit determines a processing shape of the terminal portion based on at least one change in a moving direction, a moving speed, and a moving acceleration of a touch position near the position where the touch is released;
The information terminal according to claim 1. In the case of a pressure-sensitive touch panel where the touch panel detects pressing,
The data processing unit determines the size of the processing shape of the terminal portion based on the change in the pressing force of the touch near the position where the touch is released.
The information terminal according to claim 2. When the touch panel is touched at a plurality of points,
The data processing unit extrapolates a line to the tip of each position where the touch is released based on the movement locus of the touch position near each position where the touch is released.
The information terminal according to claim 1. The data processing unit extends the extrapolated lines to an intersection when the interval between the plurality of touch positions becomes small near the position where the touch is released, and the interval between the plurality of touch positions is equal to the touch position. When it becomes larger in the vicinity of the position where the touch is released, a line having a predetermined length is extrapolated from each position where the touch is released, or a plurality of positions where the touch is released are determined in advance. Connect with the shape of
The information terminal according to claim 4. After the touch is released, the data processing unit releases the touch when it is touched again within a predetermined time, or within a predetermined time and within a predetermined distance range. Extrapolate the line from the selected position and connect it to the touched position again.
The information terminal according to claim 1, wherein the information terminal is an information terminal. A drawing control program that operates on an information terminal including a touch panel capable of detecting a touch position on a display unit,
The information terminal,
A function that identifies the movement locus of the touch position based on a signal output from the touch panel and draws or erases a line defined by the movement locus, and the vicinity of the position where the touch is released when the touch is released Functioning as a data processing unit having a function of processing the shape of the terminal portion of the line being drawn or erased based on the touch state of
A drawing control program characterized by that. When the touch panel is touched at one point,
The data processing unit determines a processing shape of the terminal portion based on at least one change in a moving direction, a moving speed, and a moving acceleration of a touch position near the position where the touch is released;
The drawing control program according to claim 7. In the case of a pressure-sensitive touch panel where the touch panel detects pressing,
The data processing unit determines the size of the processing shape of the terminal portion based on the change in the pressing force of the touch near the position where the touch is released.
The drawing control program according to claim 8. When the touch panel is touched at a plurality of points,
The data processing unit extrapolates a line to the tip of each position where the touch is released based on the movement locus of the touch position near each position where the touch is released.
The drawing control program according to claim 7. The data processing unit extends the extrapolated lines to an intersection when the interval between the plurality of touch positions becomes small near the position where the touch is released, and the interval between the plurality of touch positions is equal to the touch position. When it becomes larger in the vicinity of the position where the touch is released, a line having a predetermined length is extrapolated from each position where the touch is released, or a plurality of positions where the touch is released are determined in advance. Connect with the shape of
The drawing control program according to claim 10. After the touch is released, the data processing unit releases the touch when it is touched again within a predetermined time, or within a predetermined time and within a predetermined distance range. Extrapolate the line from the selected position and connect it to the touched position again.
The drawing control program according to claim 7, wherein the drawing control program is any one of the following. A drawing control method in an information terminal including a touch panel capable of detecting a touch position on a display unit,
A first step of identifying a movement locus of a touch position based on a signal output from the touch panel and drawing or erasing a line defined by the movement locus;
Performing a second step of processing the shape of the terminal portion of the line being drawn or erased based on the touch state near the position where the touch is released when the touch is released;
A drawing control method characterized by that. When the touch panel is touched at one point,
In the second step, the processing shape of the terminal portion is determined based on at least one change in the moving direction, moving speed, and moving acceleration of the touch position near the position where the touch is released.
The drawing control method according to claim 13. In the case of a pressure-sensitive touch panel where the touch panel detects pressing,
In the second step, the size of the processing shape of the terminal portion is determined based on a change in the pressing force of the touch in the vicinity of the position where the touch is released.
The drawing control method according to claim 14. When the touch panel is touched at a plurality of points,
In the second step, based on the movement trajectory of the touch position near each position where the touch is released, extrapolate a line to the tip of each position where the touch is released.
The drawing control method according to claim 13. In the second step, when the interval between the plurality of touch positions becomes small in the vicinity of the position where the touch is released, the extrapolated lines are extended to the intersection, and the interval between the plurality of touch positions is When it becomes larger in the vicinity of the position where the touch is released, a line having a predetermined length is extrapolated from each position where the touch is released, or a plurality of positions where the touch is released are determined in advance. Connect with the shape of
The drawing control method according to claim 16. After the touch is released in the second step, the touch is released when the touch is made again within a predetermined time or within a predetermined time and within a predetermined distance range. Extrapolate the line from the selected position and connect it to the touched position again.
The drawing control method according to claim 13, wherein:

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