Feature request: cancel selection change

[IAfanasov]

I had scenario with validation. User should choose the polygon and fill it's properties. Like name, year and etc. This properties should be validated. I want to disallow user to select other object or clear selection before she correct all validation issues.

[mcwhittemore]

So, the quick answer is to use the draw.modechange event revert back to the state you want the user to be in.

The long answer is that this might be a really good mode modifier function. With custom modes now live, one could write a module that wraps a mode in a validation check.

var defaultDirectSelectMode = MapboxDraw.modes.directSelect;
var validator = require('mapbox-gl-draw-validate-features'); // what needs to be written
var validatorDirectSelectMode = validator(defaultDirectSelectMode, function(some, args) {
  return false; // stay in the same mode
  return true; // continue changing the mode
});

If this was written and published to npm, I'd love to put it in the custom modes docs

[kkaefer]

closing because this is not currently actionable