fix msgbox hasCancel and home id editor focus problem

flutter_hbb/lib/common.dart

@@ -61,19 +61,22 @@ Future<T> showAlertDialog<T>(BuildContext context, BuildAlertDailog build,
 }
 
 void msgbox(String type, String title, String text, BuildContext context,
-    [hasCancel = false]) {
+    [bool hasCancel]) {
+  if (hasCancel == null) {
+    hasCancel = type != 'error';
+  }
   showAlertDialog(
       context,
       (_) => Tuple3(Text(title), Text(text), [
             hasCancel
-                ? Spacer()
-                : FlatButton(
+                ? FlatButton(
                     textColor: MyTheme.accent,
                     onPressed: () {
                       Navigator.pop(context);
                     },
                     child: Text('Cancel'),
-                  ),
+                  )
+                : Spacer(),
             FlatButton(
               textColor: MyTheme.accent,
               onPressed: () {

flutter_hbb/lib/home_page.dart

@@ -48,6 +48,10 @@ class _HomePageState extends State<HomePage> {
         builder: (BuildContext context) => RemotePage(id: id),
       ),
     );
+    FocusScopeNode currentFocus = FocusScope.of(context);
+    if (!currentFocus.hasPrimaryFocus) {
+      currentFocus.unfocus();
+    }
   }
 
   Widget getSearchBarUI() {
@@ -98,7 +102,7 @@ class _HomePageState extends State<HomePage> {
                           color: Color(0xFFB9BABC),
                         ),
                       ),
-                      autofocus: false,
+                      autofocus: _idController.text.isEmpty,
                       controller: _idController,
                     ),
                   ),
@@ -110,6 +114,7 @@ class _HomePageState extends State<HomePage> {
                     icon: Icon(Icons.arrow_forward,
                         color: Color(0xFFB9BABC), size: 45),
                     onPressed: onConnect,
+                    autofocus: _idController.text.isNotEmpty,
                   ),
                 )
               ],

flutter_hbb/lib/model.dart

@@ -177,7 +177,24 @@ class CanvasModel with ChangeNotifier {
 
   void updateOffset(double dx, double dy) {
     _x += dx;
+    if (_x > 0) {
+      _x = 0;
+      dx = -dx;
+    }
     _y += dy;
+    if (_y > 0) {
+      _y = 0;
+      dy = -dy;
+    }
+    _xPan += dx;
+    _yPan += dy;
+    var px = (_xPan > 0 ? _xPan.floor() : _xPan.ceil()).toDouble();
+    var py = (_yPan > 0 ? _yPan.floor() : _yPan.ceil()).toDouble();
+    if (px != 0 || py != 0) {
+      FFI.cursorModel.update(-px, -py);
+      _xPan -= px;
+      _yPan -= py;
+    }
     notifyListeners();
   }
 
@@ -253,6 +270,14 @@ class CursorModel with ChangeNotifier {
     notifyListeners();
   }
 
+  void update(double dx, double dy) {
+    _x += dx;
+    _y += dy;
+    var x = _x.toInt();
+    var y = _y.toInt();
+    FFI.setByName('send_mouse', json.encode({'x': '$x', 'y': '$y'}));
+  }
+
   void clear() {
     _x = -10000;
     _x = -10000;

flutter_hbb/lib/remote_page.dart

@@ -169,9 +169,6 @@ class _RemotePageState extends State<RemotePage> {
                   if (value == 'mode') {}
                 }();
               },
-              onDoubleTap: () {
-                print('double tap');
-              },
               onTap: () {
                 print('tap');
               },