SketchViewModel and ctrl

PhilBastian — Mon, 30 Nov 2020 05:13:00 GMT

I have a requirement to draw a rectangle for selecting features. I am doing this using a sketchviewmodel and its create method. A secondary requirement is to change the selection behaviour when the ctrl key is pressed, however the sketchviewmodel has inbuilt functionality to lock the aspect ratio when ctrl is pressed, drawing a square instead of a rectangle. Is there a way to disable this functionality?

Re: SketchViewModel and ctrl

SebastianFrey1 — Fri, 12 Sep 2025 08:05:57 GMT

@PhilBastian I am almost 5 years late to the party, but I had the same problem recently. After doing some obfuscated JS archaeology, I came up with following solution:

// import sketchKeys variable from keybindings import { sketchKeys } from '@arcgis/core/views/interactive/keybindings'; // assign some arbitrary string to constraint sheetKeys.constraint = '__NOT_A_KEY__' // now you can create, without preserving aspect ratio while holding Shift sketch.create('rectangle');

If you want the original behavior back, you will have to reset sheetKeys.constraint:

// reset preserv aspect ratio behavior sheetKeys.constraint = 'Shift';

But be aware: This solution may break at any time, because it relies an internal undocumented API.

(Tested with 4.33.x)

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SketchViewModel and ctrl

Re: SketchViewModel and ctrl