PDFTron WebViewer Class: SelectionAlgorithm

Class: SelectionAlgorithm

Core .Annotations. SelectionAlgorithm

Represents static utility functions to determine hit testing for annotations.

Name	Type	Default	Description
`canvasVisibilityPadding`	number	5	Defines a padding for the canvas visibility test algorithm. Increase this value to make selection more forgiving.

<static> boundingRectTest(annotation, x, y, zoom)

Tests if the provided x and y coordinate is within the annotation's bounding rectangle (x, y, width, height).

Name	Type	Default	Description
`annotation`	Core.Annotations.Annotation
`x`	number		the x-coordinate of the point to test, in page coordinates
`y`	number		the y-coordinate of the point to test, in page coordinates
`zoom`	number	1	the zoom level to use in the calculation if the annotation has a no zoom property

true if the provided point is a hit on the annotation

<static> canvasVisibilityTest(annotation, x, y)

Tests if the provided x and y coordinate is a visible point on the canvas.

Name	Type	Description
`annotation`	Core.Annotations.Annotation
`x`	number	the x-coordinate of the point to test, in page coordinates
`y`	number	the y-coordinate of the point to test, in page coordinates

true if the provided point is a hit on the annotation

<static> insidePolygonTest(annotation, x, y, pageMatrix, zoom)

Tests if the provided x and y coordinate is inside of the provided polygon annotation

Name	Type	Description
`annotation`	Core.Annotations.PolygonAnnotation	The polygon annotation
`x`	number	The x-coordinate of the point to test, in page coordinates
`y`	number	The y-coordinate of the point to test, in page coordinates
`pageMatrix`	object	The page matrix for the page that the annotation is on.
`zoom`	number	The zoom level to use in the calculation if the annotation has a no zoom property

<static> textQuadTest(annotation, x, y)

Tests if the provided x and y coordinate is within a text Quad of the provided text-based annotation.

Name	Type	Description
`annotation`	Core.Annotations.TextMarkupAnnotation	the text markup annotation
`x`	number	the x-coordinate of the point to test, in page coordinates
`y`	number	the y-coordinate of the point to test, in page coordinates

true if the provided point is a hit on the annotation