Rotated rectangle drawing on electronic devices

摘要

Methods for drawing a rotated rectangle on an electronic device are provided. In one aspect, a method includes receiving content configured for display and analyzing the content to identify a skew angle associated with the content. The method also includes receiving an input request to draw a rectangle overlaid upon the content, and providing, for display, the rectangle overlaid upon the content based upon the input request, the rectangle rotated according to the skew angle. Systems and machine-readable media are also provided.

主权项

1. A computer-implemented method for drawing a rotated rectangle on an electronic device, the method comprising:
receiving content configured for display in a graphical user interface having a default x axis aligned with the cardinal directions east and west and a default y axis aligned with the cardinal directions north and south; analyzing the content to identify a skew angle associated with the content, wherein the skew angle is based on a dominant angle identified from lines within the content configured for display, wherein the skew angle is used to define rotated x′ and y′ axes, wherein the rotated x′ and y′ axes are configured by rotating the default x and y axes by the identified skew angle; receiving an input request to draw a rotated rectangle overlaid upon the content, wherein the rotated rectangle is not aligned with the x and y axes of the graphical user interface; and providing, for display, the rotated rectangle overlaid upon the content based upon the input request, the rotated rectangle drawn according to the skew angle such that each edge of the rectangle is aligned in parallel with one of the rotated x′ and y′ axes, while the content remains unrotated.