Method and implementation device for inertial movement of window object

• US 20120306796A1
• Filed: 07/06/2011
• Published: 12/06/2012
• Est. Priority Date: 07/07/2010
• Status: Active Grant

• Current Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Original Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Inventors: Ren, Min, Zhang, Qiang, Gao, Shundong
• Granted Patent: US 8,462,132 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0481 based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

Provided are a method and an implementation device for inertial movement of a window object, to realize inertial movement effect of a window object based on linear speed and angular speed. When an input device releases a window object being dragged, the initial linear speed and the initial angular speed are obtained, and then the deceleration of linear speed and the deceleration of angular speed are used to obtain quantity of displacement and quantity of rotation corresponding to each processing period; the inertial movement effect of the window object is simulated after the release of a mouse button or the release of a finger from a touch screen. Through the method and device, the inertial movement effect of the window object is realized, thereby facilitating touch operation, enhancing ease of use of terminal software, and improving user experience.

Claims

1. A method for inertial movement of a window object, comprising:

A;

monitoring initial touch operation of an input device, recording initial touch coordinate and touch time, and starting a first timer;

B;

in the process of dragging the window object, periodically triggering, by the first timer, an event of obtaining quantity of displacement and quantity of rotation that are generated on a screen by a user through the input device relative to a previous time point, and sending the obtained quantity of displacement and quantity of rotation to the window object;

C;

when the user releases the window object, obtaining initial linear speed and initial angular speed of the window object, and starting a second timer;

D;

based on the initial linear speed and the initial angular speed, periodically triggering, by the second timer, an event of obtaining current quantity of displacement and quantity of rotation of the window object according to deceleration of linear speed and deceleration of angular speed, and sending the obtained current quantity of displacement and quantity of rotation to the window object;

E;

when the initial linear speed and the initial angular speed corresponding to current period of the second timer are less than or equal to 0, terminating the process of inertial movement of the window object.

2. The method according to claim 1, wherein the user drags, with one or multiple touch points, the window object through the input device;

in the case of multiple touch points, the quantity of displacement and the quantity of rotation is obtained based on two touch points with smallest device numbers.

3. The method according to claim 2, wherein in the case of single touch point,

obtaining the quantity of displacement and the quantity of rotation in Step B is:

quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(X_i−

X_i-1,Y_i−

Y_i-1),

where (X_i,Y_i) is a coordinate vector of a touch point corresponding to T_i period of the first timer, and (X_i-1,Y,_i-1) is a coordinate vector of a touch point corresponding to T_i-1 period of the first timer;

quantity of rotation between T_i-1 and T_i is;

α

_i=arcos [u_i. v_i/(|u_i∥

v_i|)];

wherein a rotation center coordinate is a center coordinate of the window object;

(C_x,C_y);

u_i is a vector between the touch point coordinate corresponding to T_i period of the first timer and the rotation center coordinate, namely u_i=(X_i−

C_x,Y_i−

C_y);

v_i is a vector between the touch point coordinate corresponding to T_i-1 period of the first timer and the rotation center coordinate, namely v_i=(X_i-1−

C_x,Y_i-1−

C_y);

obtaining the initial linear speed V and the initial angular speed Va in Step C is;

V=(X_n−

X_n-1,Y_n−

Y_n-1)/(T_n−

T_n-1)=(X_n−

X_n-1,Y_n−

Y_n-1)/Δ

t,

where (X_n,Y_n) is a coordinate vector of a touch point corresponding to a last period T_n of the first timer when the input device releases the window object;

(X_n-1,Y_n-1) is a coordinate vector of a touch point corresponding to T_n-1 period;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector between the touch point coordinate (X_n,Y_n) corresponding to T_n period of the first timer and the rotation center coordinate (C_x,C_y), namely u_n=(X_n−

C_x,Y_n−

C_y), when the input device releases the window object; and

v_n is a vector between the touch point coordinate corresponding to T_n-1 period of the first timer and the rotation center coordinate, namely v_n=(X_n-1−

C_x,Y_n-1−

C_y).

4. The method according to claim 2, wherein in the case of multiple touch points,

obtaining the quantity of displacement and the quantity of rotation in Step B is:

quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(CX_i−

CX_i-1,CY_i−

CY_i-1),

where (CX_i,CY_i) and (CX_i-1,CY_i-1) are center coordinates of two touch points with smallest device numbers corresponding respectively to T_i period and T_i-1 period of the first timer;

quantity of rotation between T_i-1 and T_i is;

α

_i=arcos [u_i. v_i/(|u_i∥

v_i|)],

where u_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i period of the first timer, v_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i-1 period of the first timer;

obtaining V and Va in Step C is;

V=(CX_n−

CX_n-1,CY_n−

CY_n-1)/(T_n−

T_n-1)=(CX_n−

CX_n-1,CY_n−

CY_n-1)/Δ

t,

where (CX_n,CY_n) and (CX_n-1,CY_n-1) are center coordinates of vectors which are formed by the two touch points with the smallest device numbers respectively during a last period T_n and T_n-1 period of the first timer, when the input device releases the window object;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector formed by the two touch points with the smallest device numbers corresponding to the last period T_n of the first timer when the input device releases the window object, and v_n is a vector formed by the two touch points with the smallest device numbers corresponding to T_n-1 period.

5. The method according to claim 1, wherein obtaining the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed in Step D is:

quantity of displacement corresponding to T_i period of the second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i−

Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones obtained in Step C respectively.

11. The method according to claim 2, wherein obtaining the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed in Step D is:

quantity of displacement corresponding to T_i period of the second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i−

Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones obtained in Step C respectively.

12. The method according to claim 3, wherein obtaining the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed in Step D is:

quantity of displacement corresponding to T_i period of the second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i−

Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones obtained in Step C respectively.

13. The method according to claim 4, wherein obtaining the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed in Step D is:

quantity of displacement corresponding to T_i period of the second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i−

Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones obtained in Step C respectively.

6. A device for inertial movement of a window object, comprising:

a touch point capturing unit, configured to capture operation that an input device drags the window object on a screen, and generate corresponding control information;

a drag processing unit, configured to realize dragging effect of the window object according to the control information sent from the touch point capturing unit, obtain initial linear speed and initial angular speed when the input device releases the window object, and send the obtained initial linear speed and the initial angular speed to an inertia processing unit; and

the inertia processing unit, configured to, based on the initial linear speed and the initial angular speed sent from the drag processing unit, realize inertial movement effect according to deceleration of linear speed and deceleration of angular speed.

7. The device according to claim 6, wherein the control information generated by the touch point capturing unit comprises:

initial control information when the input device initially touches the window object, comprising position, time, device number, and identity indicating initially touching the window object;

current control information when the input device moves the window object, comprising position, time, device number, and identity indicating dragging the window object;

release control information when the input device releases the window object, comprising position, time, device number, and identity indicating releasing the window object.

8. The device according to claim 7, wherein the drag processing unit comprises:

a first movement processing unit, configured to start a first timer when receiving the initial control information sent from the touch point capturing unit, obtain, according to the current control information sent from the touch point capturing unit, quantity of displacement and quantity of rotation of the window object corresponding to current period of the first timer under triggering of the first timer, and send the obtained quantity of displacement and quantity of rotation to the window object; and

an initial speed processing unit, configured to obtain the initial linear speed and the initial angular speed after receiving the release control information sent from the touch point capturing unit, and send the obtained initial linear speed and initial angular speed to the inertia processing unit.

9. The device according to claim 8, wherein

in the case of single touch point,

the first movement processing unit obtains the quantity of displacement and the quantity of rotation through the following way:

quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(X_i−

X_i-1,Y_i−

Y_i-1),

wherein, (X_i,Y_i) is a coordinate vector of a touch point corresponding to T_i period of the first timer, and (X_i-1,Y_i-1) is a coordinate vector of a touch point corresponding to T_i-1 period of the first timer;

quantity of rotation between T_i-1 and T_i is;

α

_i=arcos [u_i. v_i/(|u_i∥

v_i|)];

wherein a rotation center coordinate is a center coordinate of the window object;

(C_x,C_y);

u_i is a vector between the touch point coordinate corresponding to T_i period of the first timer and the rotation center coordinate, namely u_i=(X_i−

C_x,Y_i−

C_y);

v_i is a vector between the touch point coordinate corresponding to T_i-1 period of the first timer and the rotation center coordinate, namely v_i=(X_i-1−

C_x,Y_i-1−

C_y);

the initial speed processing unit obtains the initial linear speed V and the initial angular speed Va through the following way;

V=(X_n−

X_n-1,Y_n−

Y_n-1)/(T_n−

T_n-1)=(X_n−

X_n-1,Y_n−

Y_n-1)/Δ

t,

where (X_n,Y_n) is a coordinate vector of a touch point corresponding to a last period T_n of the first timer when the input device releases the window object;

(X_n-1,Y_n-1) is a coordinate vector of a touch point corresponding to T_n-1 period;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector between the touch point coordinate (X_n,Y_n) corresponding to T_n period of the first timer and the rotation center coordinate (C_x,C_y), namely u_n=(X_n−

C_x,Y_n−

C_y) when the input device releases the window object; and

v_n is a vector between the touch point coordinate corresponding to T_n-1 period of the first timer and the rotation center coordinate, namely v_n=(X_n-1−

C_x,Y_n-1−

C_y);

in the case of multiple touch points,

the first movement processing unit obtains the quantity of displacement and the quantity of rotation through the following way;

the quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(CX_i−

CX_i-1,CY_i−

CY_i-1),

where (CX_i,CY_i) and (CX_i-1,CY_i-1) are center coordinates of two touch points with smallest device numbers corresponding respectively to T_i period and T_i-1 period of the first timer;

the quantity of rotation between T_i-1 and T_i is;

α

_i=arcos [u_i. v_i/(|u_i∥

v_i|)],

where u_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i period of the first timer, v_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i-1 period of the first timer;

the initial speed processing unit obtains the initial linear speed V and the initial angular speed Va through the following way;

V=(CX_n−

CX_n-1,CY_n−

CY_n-1)/(T_n−

T_n-1)=(CX_n−

CX_n-1,CY_n−

CY_n-1)/Δ

t,

where (CX_n,CY_n) and (CX_n-1,CY_n-1) are center coordinates of vectors which are formed by the two touch points with the smallest device numbers respectively during a last period T_n and T_n-1 period of the first timer, when the input device releases the window object;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector formed by the two touch points with the smallest device numbers corresponding to the last period T_n of the first timer, when the input device releases the window object, and v_n is a vector formed by the two touch points with the smallest device numbers corresponding to T_n-1 period.

10. The device according to claim 8, wherein the inertia processing unit obtains the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed through the following way:

quantity of displacement corresponding to T_i period of a second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i-Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is an initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones sent by the drag processing unit respectively.

14. The device according to claim 6, wherein the drag processing unit comprises:

a first movement processing unit, configured to start a first timer when receiving the initial control information sent from the touch point capturing unit, obtain, according to the current control information sent from the touch point capturing unit, quantity of displacement and quantity of rotation of the window object corresponding to current period of the first timer under triggering of the first timer, and send the obtained quantity of displacement and quantity of rotation to the window object; and

an initial speed processing unit, configured to obtain the initial linear speed and the initial angular speed after receiving the release control information sent from the touch point capturing unit, and send the obtained initial linear speed and initial angular speed to the inertia processing unit.

15. The device according to claim 14, wherein

in the case of single touch point,

the first movement processing unit obtains the quantity of displacement and the quantity of rotation through the following way:

quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(X_i−

X_i-1,Y_i−

Y_i-1),

wherein, (X_i,Y_i) is a coordinate vector of a touch point corresponding to T_i period of the first timer, and (X_i-1,Y_i-1) is a coordinate vector of a touch point corresponding to T_i-1 period of the first timer;

quantity of rotation between T_i-1 and T_i is;

α

_i=arcos [u_i. v_i/(|u_i∥

v_i|)];

wherein a rotation center coordinate is a center coordinate of the window object;

(C_x,C_y);

u_i is a vector between the touch point coordinate corresponding to T_i period of the first timer and the rotation center coordinate, namely u_i=(X_i−

C_x,Y_i−

C_y);

v_i is a vector between the touch point coordinate corresponding to T_i-1 period of the first timer and the rotation center coordinate, namely v_i=(X_i-1−

C_x,Y_i-1−

C_y);

the initial speed processing unit obtains the initial linear speed V and the initial angular speed Va through the following way;

V=(X_n−

X_n-1,Y_n−

Y_n-1)/(T_n−

T_n-1)=(X_n−

X_n-1,Y_n−

Y_n-1)/Δ

t,

where (X_n,Y_n) is a coordinate vector of a touch point corresponding to a last period T_n of the first timer when the input device releases the window object;

(X_n-1,Y_n-1) is a coordinate vector of a touch point corresponding to T_n-1 period;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector between the touch point coordinate (X_n,Y_n) corresponding to T_n period of the first timer and the rotation center coordinate (C_x,C_y), namely u_n=(X_n−

C_x,Y_n−

C_y) when the input device releases the window object; and

v_n is a vector between the touch point coordinate corresponding to T_n-1 period of the first timer and the rotation center coordinate, namely v_n=(X_n-1−

C_x,Y_n-1−

C_y);

in the case of multiple touch points,

the first movement processing unit obtains the quantity of displacement and the quantity of rotation through the following way;

the quantity of displacement between T_i-1 and T_i is;

(Δ

X,Δ

Y)=(CX_i−

CX_i-1,CY_i−

CY_i-1),

where (CX_i,CY_i) and (CX_i-1,CY_i-1) are center coordinates of two touch points with smallest device numbers corresponding respectively to T_i period and T_i-1 period of the first timer;

the quantity of rotation between T_i-1 and T_i is;

α

_i=arcos[u₁. v_i/(|u_i∥

v_i|)],

where u_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i period of the first timer, v_i is a vector formed by the two touch points with the smallest device numbers corresponding to T_i-1 period of the first timer;

the initial speed processing unit obtains the initial linear speed V and the initial angular speed Va through the following way;

V=(CX_n−

CX_n-1,CY_n−

CY_n-1)/(T_n−

T_n-1)=(CX_n−

CX_n-1,CY_n−

CY_n-1)/Δ

t,

where (CX_n,CY_n) and (CX_n-1,CY_n-1) are center coordinates of vectors which are formed by the two touch points with the smallest device numbers respectively during a last period T_n and T_n-1 period of the first timer, when the input device releases the window object;

Δ

t is a timing period of the first timer;

Va=arcos [u_n. v_n/(|u_n∥

v_n|)]/(T_n−

T_n-1)=arcos [u_n. v_n/(|u_n∥

v_n|)]/Δ

t,

where u_n is a vector formed by the two touch points with the smallest device numbers corresponding to the last period T_n of the first timer, when the input device releases the window object, and v_n is a vector formed by the two touch points with the smallest device numbers corresponding to T_n-1 period.

16. The device according to claim 14, wherein the inertia processing unit obtains the current quantity of displacement and quantity of rotation of the window object according to the deceleration of linear speed and the deceleration of angular speed through the following way:

quantity of displacement corresponding to T_i period of a second timer is;

(Δ

X,Δ

Y)=(V_i−

V_dec*Tg)*Tg;

quantity of rotation corresponding to T_i period of the second timer is;

α

_i=(Va_i−

Va_dec*Tg)*Tg;

where V_dec is the deceleration of linear speed, Va_dec is the deceleration of angular speed;

V_i is an initial linear speed corresponding to T_i period of the second timer;

Va_i is initial angular speed corresponding to T_i period of the second timer;

Tg is a timing period of the second timer;

an initial linear speed and an initial angular speed corresponding to a first period of the second timer after the input device releases the window object are the ones sent by the drag processing unit respectively.