updated example code to work on ios/android AND flutter web.

[wterrill]

I opened issue #22 and thought I would give a shot at fixing it. I added the image package to pubspec.yaml in order to help with the transfer of points data from the signature pad to the saved image. This all came about because the .toByteData() is not supported for flutter web.

I hope this is useful to you. Please let me know if you need me to modify something.
Thank you very much for making the package in the first place!

[jaumard]

Hello, sorry for the delay,

Looks good but now the example doesn't explain how to retrieve image data in base64 to be send with API at all. For me the example should stay the same (and in this case only Android/iOS compatible) but another one can be added to show web compatibility.

What do you think ?

[woshikie]

Looks like the other signature library has implemented this with kIsWeb

Source

kIsWeb is a constant from Flutter Foundation and it should be reliable in determining if we are in Web or Mobile (iOS or Android).

Here's a quick documentation

package:flutter/src/foundation/constants.dart bool kIsWeb  

A constant that is true if the application was compiled to run on the web.

This implementation takes advantage of the fact that JavaScript does not support integers. In this environment, Dart's doubles and ints are backed by the same kind of object. Thus a double 0.0 is identical to an integer 0. This is not true for Dart code running in AOT or on the VM.

Therefore, I think it is possible to extend the current getData function such that if kIsWeb is true, we return the data using whatever is available on Flutter web