invert (in)validPassword property in QEWalletDB, add invalidPassword signal.

This is to better support state in OpenWallet page

electrum/gui/qml/components/OpenWallet.qml

@@ -8,7 +8,7 @@ import "controls"
 
 Pane {
     id: openwalletdialog
-
+    
     property string title: qsTr("Open Wallet")
 
     property string name
@@ -39,7 +39,7 @@ Pane {
             Layout.columnSpan: 2
             Layout.alignment: Qt.AlignHCenter
             text: qsTr("Invalid Password")
-            visible: wallet_db.invalidPassword && _unlockClicked
+            visible: !wallet_db.validPassword && _unlockClicked
             width: parent.width * 2/3
             error: true
         }
@@ -53,16 +53,24 @@ Pane {
             id: password
             visible: wallet_db.needsPassword
             echoMode: TextInput.Password
+            inputMethodHints: Qt.ImhSensitiveData
+            onTextChanged: {
+                unlockButton.enabled = true
+                _unlockClicked = false
+            }
+            onAccepted: {
+                unlock()
+            }
         }
 
         Button {
+            id: unlockButton
             Layout.columnSpan: 2
             Layout.alignment: Qt.AlignHCenter
             visible: wallet_db.needsPassword
             text: qsTr("Unlock")
             onClicked: {
-                _unlockClicked = true
-                wallet_db.password = password.text
+                unlock()
             }
         }
 
@@ -87,8 +95,22 @@ Pane {
             text: qsTr('Split wallet')
             onClicked: wallet_db.doSplit()
         }
+        
+        BusyIndicator {
+            id: busy
+            running: false
+            Layout.columnSpan: 2
+            Layout.alignment: Qt.AlignHCenter
+        }
     }
 
+    function unlock() {
+        unlockButton.enabled = false
+        _unlockClicked = true
+        wallet_db.password = password.text
+        openwalletdialog.forceActiveFocus()
+    }
+    
     WalletDB {
         id: wallet_db
         path: openwalletdialog.path
@@ -99,10 +121,17 @@ Pane {
         }
         onReadyChanged: {
             if (ready) {
+                busy.running = true
                 Daemon.load_wallet(openwalletdialog.path, password.text)
                 app.stack.pop(null)
             }
         }
+        onInvalidPassword: {
+            password.forceActiveFocus()
+        }
+    }
+    
+    Component.onCompleted: {
+        password.forceActiveFocus()
     }
-
 }

electrum/gui/qml/qedaemon.py

@@ -97,7 +97,7 @@ class QEDaemon(AuthMixin, QObject):
         self.daemon = daemon
         self.qefx = QEFX(daemon.fx, daemon.config)
         self._walletdb = QEWalletDB()
-        self._walletdb.invalidPasswordChanged.connect(self.passwordValidityCheck)
+        self._walletdb.validPasswordChanged.connect(self.passwordValidityCheck)
 
     _logger = get_logger(__name__)
     _loaded_wallets = QEWalletListModel()
@@ -115,7 +115,7 @@ class QEDaemon(AuthMixin, QObject):
 
     @pyqtSlot()
     def passwordValidityCheck(self):
-        if self._walletdb._invalidPassword:
+        if not self._walletdb._validPassword:
             self.walletRequiresPassword.emit()
 
     @pyqtSlot()

electrum/gui/qml/qewalletdb.py

@@ -25,20 +25,21 @@ class QEWalletDB(QObject):
     needsPasswordChanged = pyqtSignal()
     needsHWDeviceChanged = pyqtSignal()
     passwordChanged = pyqtSignal()
-    invalidPasswordChanged = pyqtSignal()
+    validPasswordChanged = pyqtSignal()
     requiresSplitChanged = pyqtSignal()
     splitFinished = pyqtSignal()
     readyChanged = pyqtSignal()
     createError = pyqtSignal([str], arguments=["error"])
     createSuccess = pyqtSignal()
-
+    invalidPassword = pyqtSignal()
+    
     def reset(self):
         self._path = None
         self._needsPassword = False
         self._needsHWDevice = False
         self._password = ''
         self._requiresSplit = False
-        self._invalidPassword = False
+        self._validPassword = True
 
         self._storage = None
         self._db = None
@@ -110,15 +111,15 @@ class QEWalletDB(QObject):
     def requiresSplit(self):
         return self._requiresSplit
 
-    @pyqtProperty(bool, notify=invalidPasswordChanged)
-    def invalidPassword(self):
-        return self._invalidPassword
+    @pyqtProperty(bool, notify=validPasswordChanged)
+    def validPassword(self):
+        return self._validPassword
 
-    @invalidPassword.setter
-    def invalidPassword(self, invalidPassword):
-        if self._invalidPassword != invalidPassword:
-            self._invalidPassword = invalidPassword
-            self.invalidPasswordChanged.emit()
+    @validPassword.setter
+    def validPassword(self, validPassword):
+        if self._validPassword != validPassword:
+            self._validPassword = validPassword
+            self.validPasswordChanged.emit()
 
     @pyqtProperty(bool, notify=readyChanged)
     def ready(self):
@@ -148,9 +149,10 @@ class QEWalletDB(QObject):
 
             try:
                 self._storage.decrypt('' if not self._password else self._password)
-                self.invalidPassword = False
+                self.validPassword = True
             except InvalidPassword as e:
-                self.invalidPassword = True
+                self.validPassword = False
+                self.invalidPassword.emit()
 
         if not self._storage.is_past_initial_decryption():
             self._storage = None