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dart - How to listen for Text-Change in Quill text Editor (Flutter)

To detect changes in the Quill editor's text, we can utilize the QuillController, which provides a way to manage and interact with the editor's state.

  1. Initialization: Create and initialize a QuillController instance. This controller is linked to the Quill editor and allows for the monitoring of text changes.

    late QuillController _quillController = QuillController.basic();
  2. Listening to Text Changes: Add a listener to the QuillController to detect changes in the editor's content. This listener will trigger a callback function whenever the text within the editor changes.

    @override void initState() { super.initState(); _quillController.addListener(_onEditorTextChanged); }
  3. Handling Text Changes: The callback function _onEditorTextChanged is invoked whenever the editor's content changes. Within this function, you can access the current text of the editor and perform any necessary logic.

    void _onEditorTextChanged() { final text = _quillController.document.toPlainText(); // Implement your logic here, such as searching for URLs or updating the UI. }
  4. Cleanup: Remove the listener when the widget is disposed to prevent memory leaks or unintended behavior.

    @override void dispose() { _quillController.removeListener(_onEditorTextChanged); super.dispose(); }

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