class cee.mrk.CustomDrawOntoCanvasCallback()

A callback function that can be used to draw custom content onto a label.

Use this callback to override how labels are drawn. This gives you total freedom to draw any type of label. In the callback you need to resize the canvas to a size that suits your needs, and draw any text or other content onto the canvas. The label text is passed as input, but this text can be a custom markup language to control the layout of the label.

If you return if you did the drawing, return false to let the label be drawn as usual.

Example: ```javascript

function myCustomDrawOntoCanvasFunction(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, text:string): boolean { canvas.width = 500; canvas.height = 150; const gradient = ctx.createLinearGradient(0, 0, canvas.width, canvas.height); gradient.addColorStop(0, “red”); gradient.addColorStop(0.17, “orange”); gradient.addColorStop(0.33, “yellow”); gradient.addColorStop(0.5, “green”); gradient.addColorStop(0.666, “blue”); gradient.addColorStop(1, “violet”);

// Set the fill style and draw a rectangle ctx.fillStyle = gradient; ctx.fillRect(0, 0, canvas.width, canvas.height);

ctx.font = “20px Comic Sans MS”; ctx.fillStyle = “red”; ctx.fillText(text, 50, 75);

return true; }