Method for scroll bar control on a touchpad and touchpad with scroll bar control function
A touchpad includes a controller connected to a touch sensor. The controller detects the fingers touching on the touch sensor to determine to start up and terminate a scroll bar control function. In the scroll bar control function, the movement of the finger or fingers touching on the touch sensor is detected for scrolling on a window, and the vertical distance and the horizontal distance of the movement are evaluated for determining the scrolling amount of a vertical scroll bar or a horizontal scroll bar of the window.
1. A touch device, comprising:
a touch sensor; and
said touch device having a scroll bar control function for detecting a number of fingers touching on the touch sensor;
wherein if the number of fingers is equal to or larger than a first threshold, the touch device will start up the scroll bar control function independent of a sliding-movement of the fingers, and detect a movement of the fingers on the touch sensor for scrolling on a window accordingly in the scroll bar control function;
wherein the first threshold is larger than one.
2. The touch device according to claim 1 , wherein the first threshold is two.
3. The touch device according to claim 1 , wherein the scroll bar control function is continued if the number of fingers touching on the touch sensor is not less than a second threshold which is larger than zero and is equal to or less than the first threshold.
4. The touch device according to claim 1 , wherein the scroll bar control function is terminated once the number of fingers touching on the touch sensor is equal to or less than a second threshold which is less than the first threshold.
5. The touch device according to claim 4 , wherein the second threshold is equal to or less than one.
6. The touch device according to claim 1 , wherein a vertical distance and a horizontal distance of the movement for scrolling a vertical scroll bar and a horizontal scroll bar on the window, are respectively evaluated.
7. The touch device according to claim 1 , wherein a vertical distance and a horizontal distance of the movement are evaluated for scrolling a vertical scroll bar on the window if the vertical distance is larger than the horizontal distance over a first reference, or scrolling a horizontal scroll bar on the window if the horizontal distance is larger than the vertical distance over a second reference.
8. The touch device according to claim 7 , wherein a scrolling amount for the vertical scroll bar is determined in proportion to a difference between the vertical distance and the horizontal distance.
9. The touch device according to claim 7 , wherein a scrolling amount for the vertical scroll bar is determined in proportion to the vertical distance.
10. The touch device according to claim 7 , wherein a scrolling amount for the horizontal scroll bar is determined in proportion to a difference between the horizontal distance and the vertical distance.
11. The touch device according to claim 7 , wherein a scrolling amount for the horizontal scroll bar is determined in proportion to the horizontal distance.
12. A touch device, comprising:
a touch sensor; and
said touch device having a window scrolling control function for detecting a number of fingers touching on the touch sensor;
wherein if the number of fingers is equal to or larger than a first threshold which is larger than one, the touch device will start up the window scrolling control function independent of a sliding movement of the fingers, and detect a movement of the fingers on the touch sensor for scrolling a window accordingly in the window scrolling control function.
13. The touch device according to claim 12 , wherein the first threshold is two.
14. The touch device according to claim 12 , wherein the window scrolling control function is continued if the number of fingers touching on the touch sensor is not less than a second threshold which is larger than zero and is equal to or less than the first threshold.
15. The touch device according to claim 12 , wherein the window scrolling control function is terminated once the number of fingers touching on the touch sensor is equal to or less than a second threshold which is less than the first threshold.
16. The touch device according to claim 15 , wherein the second threshold is equal to or less than one.
17. The touch device according to claim 12 , wherein a vertical distance and a horizontal distance of the movement for scrolling the window in a vertical direction and a horizontal direction, are respectively evaluated.
18. The touch device according to claim 12 , wherein a vertical distance and a horizontal distance of the movement are evaluated for scrolling the window in a vertical direction if the vertical distance is larger than the horizontal distance over a first reference, or scrolling the window in a horizontal direction if the horizontal distance is larger than the vertical distance over a second reference.
19. The touch device according to claim 18 , wherein a scrolling amount for scrolling the window in the vertical direction is determined in proportion to a difference between the vertical distance and the horizontal distance.
20. The touch device according to claim 18 , wherein a scrolling amount for scrolling the window in the vertical direction is determined in proportion to the vertical distance.
21. The touch device according to claim 18 , wherein a scrolling amount for scrolling the window in the horizontal direction is determined in proportion to a difference between the horizontal distance and the vertical distance.
22. The touch device according to claim 18 , wherein a scrolling amount for scrolling the window in the horizontal direction is determined in proportion to the horizontal distance.
23. A method for window scrolling control on a touch device having a touch sensor, comprising the steps of:
detecting a number of fingers touching on the touch sensor;
starting up a window scrolling control function independent of a sliding movement of the fingers if the number of fingers is equal to or larger than a first threshold which is larger than one; and
detecting a movement of the fingers on the touch sensor for scrolling a window accordingly in the window scrolling control function.
24. The method according to claim 23 , wherein the first threshold is two.
25. The method according to claim 23 , further comprising continuing the window scrolling control function if the number of fingers touching on the touch sensor is not less than a second threshold which is larger than zero and is equal to or less than the first threshold.
26. The method according to claim 23 , further comprising terminating the window scrolling control function once the number of fingers touching on the touch sensor is equal to or less than a second threshold which is less than the first threshold.
27. The method according to claim 26 , wherein the second threshold is equal to or less than one.
28. The method according to claim 23 , further comprising evaluating a vertical distance and a horizontal distance of the movement for scrolling the window in a vertical direction and a horizontal direction, respectively.
29. The method according to claim 23 , further comprising evaluating a vertical distance and a horizontal distance of the movement for scrolling the window in a vertical direction if the vertical distance is larger than the horizontal distance over a first reference, or scrolling the window in a horizontal direction on the window if the horizontal distance is larger than the vertical distance over a second reference.
30. The method according to claim 29 , further comprising determining a scrolling amount for scrolling the window in the vertical direction in proportion to a difference between the vertical distance and the horizontal distance.
31. The method according to claim 29 , further comprising determining a scrolling amount for scrolling the window in the vertical direction in proportion to the vertical distance.
32. The method according to claim 29 , further comprising determining a scrolling amount for scrolling the window in the horizontal direction in proportion to a difference between the horizontal distance and the vertical distance.
33. The method according to claim 29 , further comprising determining a scrolling amount for scrolling the window in the horizontal direction in proportion to the horizontal distance.