Scroll control device, terminal device, and scroll control method

摘要

When a horizontal-coordinate value or a vertical-coordinate value of a current touch point with reference to a point of origin defined at a touch-start point at which a drag operation on a touch screen starts is less than a threshold value, an X-direction movement amount reset unit or a Y-direction movement amount reset unit resets an amount of horizontal movement or an amount of vertical movement in the drag operation to zero. A scroll control unit scrolls the screen in accordance with the amount of horizontal movement and the amount of vertical movement as processed by the X-direction movement amount reset unit and the Y-direction movement amount reset unit.

主权项

1. A scroll control device comprising:
a control unit that restricts horizontal scrolling and/or vertical scrolling on a screen in accordance with a comparison result between one or more predetermined threshold values and at least a horizontal-coordinate value or a vertical-coordinate value of a current touch point with reference to a point of origin defined at a touch-start point at which a drag operation on a touch screen starts, wherein the control unit decreases, during the drag operation, one or more of the threshold values from a respective value higher than a respective default threshold value to a respective value lower than the respective default threshold value; a judgment unit that locks horizontal scrolling when the horizontal-coordinate value of the current touch point is less than one value among the predetermined threshold values, and locks vertical scrolling when the vertical-coordinate value of the current touch point is less than another value among the predetermined threshold values; and a determination unit that determines direction of scrolling the screen in accordance with whether horizontal scrolling is locked and whether vertical scrolling is locked; wherein the control unit scrolls the screen in the determined direction of scrolling.