Electronic device and method for controlling zooming of displayed object

• US 10,324,604 B2
• Filed: 02/14/2017
• Issued: 06/18/2019
• Est. Priority Date: 09/29/2012
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Huang, Wen, Zhang, Jianchun
• Primary Examiner(s): Dinh, Duc Q
• Application Number:
  US15/432,682
• Publication Number:
  US 20170160913A1
• Time in Patent Office: 854 Days
• CPC Class Codes: G06F 2203/04806 Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
• CPC Class Codes: G06F 3/04845 for image manipulation, e.g. dragging, rotation, expansion or change of colour
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

An electronic device and a method for controlling zooming of a displayed object includes receiving a single-point slide operation performed by a user on a displayed object of a touch screen, generating a slide signal, parsing the slide signal to obtain a slide track and a feature value of the single-point slide operation, determining whether the feature value of at least one point in the single-point slide operation is greater than a preset value, and controlling zooming of the displayed object according to the slide track when the feature value is greater than the preset value. A slide track and a feature value of a single-point slide operation of a user are identified, and zooming of a displayed object of the touch screen is controlled when the feature value is greater than a preset value.

Claims

1. A method for controlling zooming of a displayed object, comprising:

receiving a slide operation from a user on the displayed object of a touch screen;

calculating a starting point line (L₁) of the slide operation, the L₁ extending from a reference point to a starting point of the slide operation, the reference point having coordinates (X₀, Y₀), and the starting point having coordinates (X, Y);

calculating an end point line (L₂) of the slide operation, the L₂ extending from the reference point to an ending point of the slide operation, and the ending point having coordinates (X_i, Y_i);

calculating a reference angle (q) according to an equation q=tan<sup>−

1</sup>(|Y−

Y₀|/|X−

X₀);

calculating a current angle (p) according to an equation p=tan<sup>−

1</sup>(|Y_i−

Y₀|/|X_i−

X₀));

calculating a deflection angle (α

) according to an equation α

=p−

q;

zooming in the displayed object when the α

is less than zero; and

zooming out the displayed object when the α

is greater than or equal to zero.

2. The method of claim 1, wherein the slide operation is parsed to obtain a slide track.

3. The method of claim 1, wherein a touch point in the click operation is a last touch point in the click operation.

4. The method of claim 1, wherein zooming the displayed object comprises zooming the displayed object according to a correspondence between a preset number and a first zooming scale, and a center point of the displayed object is at a center.

5. The method of claim 1, wherein the reference point on the touch screen comprises a bottom edge of the touch screen.

6. The method of claim 1, wherein the reference point on the touch screen comprises a center of the touch screen.

7. The method of claim 1, wherein the reference point on the touch screen comprises a vertex of the touch screen.

8. An electronic device, comprising:

a touch screen configured to receive a slide operation from a user on a displayed object of the touch screen; and

a processor coupled to the touch screen and configured to;

calculate a starting point line (L₁) of the slide operation, the L₁ extending from a reference point to a starting point of the slide operation, the reference point having coordinates (X₀, Y₀), and the starting point having coordinates (X, Y);

calculate an end point line (L₂) of the slide operation, the L₂ extending from the reference point to an ending point of the slide operation, and the ending point having coordinates (X_i, Y_i);

calculate a reference angle (q) according to an equation q=tan<sup>−

1</sup>(|Y−

Y₀|/|X−

X₀);

calculate a current angle (p) according to an equation p=tan<sup>−

1</sup>(|Y_i−

Y₀|/|X_i−

X₀));

calculate a deflection angle (α

) according to an equation α

=p−

q;

controlling zooming in of the displayed object when the α

is less than zero; and

controlling zooming out of the displayed object when the α

is greater than or equal to zero.

9. The electronic device of claim 8, where the slide operation is parsed to obtain a slide track.

10. The electronic device of claim 8, wherein a touch point in the click operation is a last touch point in the click operation.

11. The electronic device of claim 8, wherein the processor is further configured to control zooming the displayed object according to a correspondence between a preset number and a first zooming scale, and a center point of the displayed object is at a center.

12. The electronic device of claim 8, wherein the reference point on the touch screen comprises a bottom edge of the touch screen.

13. The electronic device of claim 8, wherein the reference point on the touch screen comprises a center of the touch screen.

14. The electronic device of claim 8, wherein the reference point on the touch screen comprises a vertex of the touch screen.