How to detect if a change was made

[Silfalion]

Hello,

I'm trying to modify the crop and rotate editor to check if there were any changes before starting the edit as to not generate another image(and speeding up the last step for the user).

Right now I'm using the screenshot history variable, however this seems to be unreliable because the initial array has 1 element and the first editing replaces this element.

Any ideas as to how to track it more reliably?

[hm21]

The “screenshot history” handles only the background-generated images. Therefore, in this case, you should access the “history” itself, which includes the class TransformConfigs. Within this class, you can call the isEmpty method to check whether there have been any changes to the transformations or if it remains empty. Below is an example:

var editor = editorKey.currentState!;
var cropEditor = editor.cropRotateEditor.currentState;
if (cropEditor?.history.isNotEmpty == true &&
    cropEditor!.history.first.isNotEmpty) {
  /// Your code
}

If you want to check in the main editor whether any changes have been applied from the crop-rotate editor, you can directly read the transformConfigs as shown below:

  if (editorKey.currentState!.stateHistory.last.transformConfigs.isNotEmpty) {
    /// Your code
  }