qml: add LabelSync toggle

electrum/gui/qml/__init__.py

@@ -41,6 +41,7 @@ class ElectrumTranslator(QTranslator):
     def translate(self, context, source_text, disambiguation, n):
         return _(source_text, context=context)
 
+
 class ElectrumGui(BaseElectrumGui, Logger):
 
     @profiler
@@ -91,7 +92,7 @@ class ElectrumGui(BaseElectrumGui, Logger):
         Exception_Hook.maybe_setup(config=config, slot=self.app.appController.crash)
 
         # Initialize any QML plugins
-        run_hook('init_qml', self)
+        run_hook('init_qml', self.app)
         self.app.engine.load('electrum/gui/qml/components/main.qml')
 
     def close(self):

electrum/gui/qml/components/Preferences.qml

@@ -217,6 +217,25 @@ Pane {
                         }
                     }
 
+                    RowLayout {
+                        Layout.columnSpan: 2
+                        Layout.fillWidth: true
+                        Layout.leftMargin: -constants.paddingSmall
+                        spacing: 0
+                        Switch {
+                            id: syncLabels
+                            onCheckedChanged: {
+                                if (activeFocus)
+                                    AppController.setPluginEnabled('labels', checked)
+                            }
+                        }
+                        Label {
+                            Layout.fillWidth: true
+                            text: qsTr('Synchronize labels')
+                            wrapMode: Text.Wrap
+                        }
+                    }
+
                     PrefsHeading {
                         Layout.columnSpan: 2
                         text: qsTr('Wallet behavior')
@@ -384,5 +403,6 @@ Pane {
         useFallbackAddress.checked = Config.useFallbackAddress
         enableDebugLogs.checked = Config.enableDebugLogs
         useRecoverableChannels.checked = Config.useRecoverableChannels
+        syncLabels.checked = AppController.isPluginEnabled('labels')
     }
 }

electrum/gui/qml/qeapp.py

@@ -19,6 +19,7 @@ from electrum.logging import Logger, get_logger
 from electrum.bip21 import BITCOIN_BIP21_URI_SCHEME, LIGHTNING_URI_SCHEME
 from electrum.base_crash_reporter import BaseCrashReporter, EarlyExceptionsQueue
 from electrum.network import Network
+from electrum.plugin import run_hook
 
 from .qeconfig import QEConfig
 from .qedaemon import QEDaemon
@@ -70,10 +71,11 @@ class QEAppController(BaseCrashReporter, QObject):
     sendingBugreportFailure = pyqtSignal(str)
     secureWindowChanged = pyqtSignal()
 
-    def __init__(self, qedaemon: 'QEDaemon', plugins: 'Plugins'):
+    def __init__(self, qeapp: 'ElectrumQmlApplication', qedaemon: 'QEDaemon', plugins: 'Plugins'):
         BaseCrashReporter.__init__(self, None, None, None)
         QObject.__init__(self)
 
+        self._app = qeapp
         self._qedaemon = qedaemon
         self._plugins = plugins
         self.config = qedaemon.daemon.config
@@ -224,12 +226,18 @@ class QEAppController(BaseCrashReporter, QObject):
         return s
 
     @pyqtSlot(str, bool)
-    def setPluginEnabled(self, plugin, enabled):
+    def setPluginEnabled(self, plugin: str, enabled: bool):
         if enabled:
             self._plugins.enable(plugin)
+            # note: all enabled plugins will receive this hook:
+            run_hook('init_qml', self._app)
         else:
             self._plugins.disable(plugin)
 
+    @pyqtSlot(str, result=bool)
+    def isPluginEnabled(self, plugin: str):
+        return bool(self._plugins.get(plugin))
+
     @pyqtSlot(result=bool)
     def isAndroid(self):
         return 'ANDROID_DATA' in os.environ
@@ -369,7 +377,7 @@ class ElectrumQmlApplication(QGuiApplication):
         self._qeconfig = QEConfig(config)
         self._qenetwork = QENetwork(daemon.network, self._qeconfig)
         self.daemon = QEDaemon(daemon)
-        self.appController = QEAppController(self.daemon, self.plugins)
+        self.appController = QEAppController(self, self.daemon, self.plugins)
         self._maxAmount = QEAmount(is_max=True)
         self.context.setContextProperty('AppController', self.appController)
         self.context.setContextProperty('Config', self._qeconfig)