API Reference › core-frontend› Views › ViewRect

ViewRect Class

A rectangle in unsigned integer view coordinates with (0,0) corresponding to the top-left corner of the view. Increasing x moves from left to right, and increasing y moves from top to bottom. left, top, right, and bottom are required to be non-negative integers; any negative inputs are treated as zero and any non-integer inputs are rounded down to the nearest integer.

Methods

Name Description
constructor(left: number = 0, top: number = 0, right: number = 0, bottom: number = 0): ViewRect Construct a new ViewRect.  
clone(result?: ViewRect): ViewRect Duplicate this ViewRect.  
computeOverlap(other: ViewRect, out?: ViewRect): undefined | ViewRect Return a ViewRect that is the overlap (intersection) of this ViewRect and another ViewRect.  
containsPoint(point: Readonly<WritableXAndY>): boolean Return true if the supplied point is contained in this ViewRect.  
equals(other: ViewRect): boolean Return true is this ViewRect is exactly equal to another ViewRect.  
extend(other: ViewRect): void    
init(left: number, top: number, right: number, bottom: number): void Initialize this ViewRect from its left/top/right/bottom parameters.  
initFromPoints(topLeft: Readonly<WritableXAndY>, bottomRight: Readonly<WritableXAndY>): void Initialize this ViewRect from two points.  
initFromRange(input: Readonly<WritableLowAndHighXY>): void Initialize this ViewRect from a range.  
inset(deltaX: number, deltaY: number): void Inset this ViewRect by values in the x and y directions.  
insetByPercent(percent: number): void Inset this ViewRect by a percentage of its current width.  
insetUniform(offset: number): void Inset this ViewRect by the same value in all directions.  
isContained(other: ViewRect): boolean Determine if this ViewRect is entirely contained within the bounds of another ViewRect.  
overlaps(other: ViewRect): boolean Determine whether this ViewRect overlaps another.  
scaleAboutCenter(xScale: number, yScale: number): void Scale this ViewRect about its center by the supplied scale factors.  
setFrom(other: ViewRect): void Initialize this ViewRect from another ViewRect.  

Properties

Name Type Description
area Accessor ReadOnly number The area (width*height) of this ViewRect.  
aspect Accessor ReadOnly number The aspect ratio (width/height) of this ViewRect.  
bottom Accessor number The bottommost side of this ViewRect.  
bottom Setter bottom(val: number): void    
height Accessor number The height (bottom-top) of this ViewRect.  
height Setter height(height: number): void    
isNull Accessor ReadOnly boolean True if this ViewRect has an area <= 0.  
isValid Accessor ReadOnly boolean True if !isNull  
left Accessor number The leftmost side of this ViewRect.  
left Setter left(val: number): void    
right Accessor number The rightmost side of this ViewRect.  
right Setter right(val: number): void    
top Accessor number The topmost side of this ViewRect.  
top Setter top(val: number): void    
width Accessor number The width (right-left) of this ViewRect.  
width Setter width(width: number): void    

Defined in

Last Updated: 28 October, 2025