on-size in editor-canvas%
Called when the window is resized. The window's new size (in pixels) is provided to the method. The size values are for the entire window, not just the client area.
(-> voidsendan-editor-canvason-sizewidthheight)
width: exact integer in [0, 10000]
height: exact integer in [0, 10000]If the canvas is displaying an editor, its
on-display-sizemethod is called.