use hidden textfield to capture input

flutter_hbb/lib/model.dart

@@ -138,8 +138,8 @@ class ImageModel with ChangeNotifier {
 class CursorModel with ChangeNotifier {
   ui.Image _image;
   final _images = Map<int, ui.Image>();
-  double _x = 0;
+  double _x = -10000;
-  double _y = 0;
+  double _y = -10000;
   double _hotx = 0;
   double _hoty = 0;
   double _displayOriginX = 0;
@@ -189,6 +189,8 @@ class CursorModel with ChangeNotifier {
   }
 
   void clear() {
+    _x = -10000;
+    _x = -10000;
     _image = null;
     _images.clear();
   }

flutter_hbb/lib/remote_page.dart

@@ -85,10 +85,7 @@ class _RemotePageState extends State<RemotePage> {
     // Size size = MediaQueryData.fromWindow(ui.window).size;
     // MediaQuery.of(context).size.height;
     EasyLoading.instance.loadingStyle = EasyLoadingStyle.light;
-    return RawKeyboardListener(
+    return WillPopScope(
-        focusNode: _focusNode,
-        onKey: _handleKeyEvent,
-        child: WillPopScope(
         onWillPop: () async {
           close();
           return false;
@@ -125,9 +122,9 @@ class _RemotePageState extends State<RemotePage> {
                               onPressed: () {
                                 SystemChrome.setEnabledSystemUIOverlays(
                                     SystemUiOverlay.values);
+                                _focusNode.requestFocus();
                                 SystemChannels.textInput
                                     .invokeMethod('TextInput.show');
-                                    _focusNode.requestFocus();
                               }),
                           Transform.rotate(
                               angle: 15 * math.pi / 180,
@@ -208,9 +205,24 @@ class _RemotePageState extends State<RemotePage> {
                         child: Stack(children: [
                           ImagePaint(),
                           CursorPaint(),
+                          SizedBox(
+                            width: 0,
+                            height: 0,
+                            child: _bottom < 100
+                                ? Container()
+                                : TextFormField(
+                                    textInputAction: TextInputAction.newline,
+                                    autocorrect: false,
+                                    enableSuggestions: false,
+                                    focusNode: _focusNode,
+                                    maxLines: null,
+                                    keyboardType: TextInputType.multiline,
+                                    onChanged: (x) => print('$x'),
+                                  ),
+                          ),
                         ])),
                   )),
-                )))));
+            ))));
   }
 
   void close() {