pickImage method
Open the image dialog picker
Implementation
Future<void> pickImage() async => await FilePicker.platform.pickFiles(
type : FileType.custom,
allowedExtensions : _fileTypes,
lockParentWindow : true,
allowMultiple : false,
withData : true
).then((response) async {
if (response == null) {
_reset(error: true);
} else {
_file = response.files.single;
_bytes = _file?.bytes;
_extension = _file?.extension??'';
_hasImage = true;
}
notifyListeners();
});