Add a OnCropChanged event to the ImageCropper

[michael-hawker]

If it is not too late yet... I am really missing a OnCropChanged event in the ImageCropper...
I would like to provide to the user a pixel dimension information about the Rect she currently crops to... All that event would have to do is fire when the crop has changed, it does not even have to transmit the new crop Rect....

Originally posted by @jhwheuer in #3062 (comment)

Hello michael-hawker, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible. Other community members may also look into the issue and provide feedback 🙌

[michael-hawker]

@jhwheuer great idea, adding it as its own issue, as it can be done earlier than 7.0.

[michael-hawker]

@HHChaos you think you could add this? I imagine it should be pretty straight-forward?

[HHChaos]

@HHChaos you think you could add this? I imagine it should be pretty straight-forward?

@michael-hawker Yes, this will be useful and I will do it in my free time