Guides

Forms

The ComPDF Flutter SDK supports multiple form event listeners. Below are commonly used form events:

Event Name	Description
formFieldsCreated	Triggered when user creates form fields, returns created form field data.
formFieldsSelected	Triggered when user selects form fields, returns selected form field data.
formFieldsDeselected	Triggered when user deselects form fields, returns deselected form field data.

To listen to these events, call the following function through CPDFReaderWidgetController after creating CPDFReaderWidget. For example:

controller.addEventListener(CPDFEvent.formFieldsCreated, (event) {
  // event is CPDFWidget object and its subclass objects
  print(jsonEncode(event));
});

controller.addEventListener(CPDFEvent.formFieldsSelected, (event) {
  // event is CPDFWidget object and its subclass objects
  print(jsonEncode(event));
});

controller.addEventListener(CPDFEvent.formFieldsDeselected, (event) {
  // event is CPDFWidget object and its subclass objects, may be null
  print(jsonEncode(event));
});