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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | /** * This class handles all data associated with the drawing canvas */ import { Fabric } from 'fabric'; class DrawingCanvas{ /** * Creates the instance of a DrawingCanvas * * @param {"pen" | "eraser"} currentTool The current tool being used on the board * @param {String} strokeColor The color to draw with * @param {number} strokeWidth The width of the pen/eraser * @param {string | null} referenceImage The image being displayed to the drawer * @throes An error if referenceImage value is not set */ constructor(currentTool, strokeColor, strokeWidth, referenceImage){ this.canvas = Fabric.Canvas; this.strokeColor = strokeColor; this.currentTool = currentTool; this.strokeWidth = strokeWidth; this.referenceImage = referenceImage; // needs to import from "ReferenceImageProvider" class if (referenceImage == null){ throw new Error('reference image not set'); } } } |