import SmartCanvas from 'canvas-gauges/lib/SmartCanvas.js'

public class | source

SmartCanvas

Drawings on canvas using hidden canvas as a cache for better performance drawings during canvas animations. SmartCanvas also adopts a canvas to

Static Member Summary

Static Public Members
public static get	pixelRatio: number: * Returns current device pixel ratio

Static Method Summary

Static Public Methods
public static	redraw() Forces redraw all canvas in the current collection

Constructor Summary

Public Constructor
public	constructor(canvas: HTMLCanvasElement, width: number, height: number)

Member Summary

Public Members
public	context: CanvasRenderingContext2D Target drawings canvas element 2D context
public	contextClone: CanvasRenderingContext2D Canvas caching element 2D context
public	drawHeight: number Actual drawings height
public	drawWidth: number Actual drawings width
public	drawX: number X-coordinate of drawings zero point
public	drawY: number Y-coordinate of drawings zero point
public	element: HTMLCanvasElement Target drawings canvas element
public	elementClone: HTMLCanvasElement \| Node Canvas caching element
public	height: number Canvas base height
public	minSide: number Minimal side length in pixels of the drawing
public	onRedraw: function \| null \| undefined On canvas redraw event callback
public	width: number Canvas base width

Method Summary

Public Methods
public	commit(): * Commits the drawings
public	destroy() Destroys this object, removing the references from memory
public	init() Initializes canvases and contexts
public	redraw(): * Redraw this object

Static Public Members

public static get pixelRatio: number: * source

Returns current device pixel ratio

Return:

number

Static Public Methods

public static redraw() source

Forces redraw all canvas in the current collection

Public Constructors

public constructor(canvas: HTMLCanvasElement, width: number, height: number) source

Params:

Name	Type	Attribute	Description
canvas	HTMLCanvasElement
width	number
height	number

Public Members

public context: CanvasRenderingContext2D source

Target drawings canvas element 2D context

public contextClone: CanvasRenderingContext2D source

Canvas caching element 2D context

public drawHeight: number source

Actual drawings height

public drawWidth: number source

Actual drawings width

public drawX: number source

X-coordinate of drawings zero point

public drawY: number source

Y-coordinate of drawings zero point

public element: HTMLCanvasElement source

Target drawings canvas element

public elementClone: HTMLCanvasElement | Node source

Canvas caching element

public height: number source

Canvas base height

public minSide: number source

Minimal side length in pixels of the drawing

public onRedraw: function | null | undefined source

On canvas redraw event callback

public width: number source

Canvas base width

Public Methods

public commit(): * source

Commits the drawings

Return:

public destroy() source

Destroys this object, removing the references from memory

public init() source

Initializes canvases and contexts

public redraw(): * source

Redraw this object