qml: initial plugin support, with labelsync mostly implemented

electrum/plugins/labels/Labels.qml

@@ -0,0 +1,45 @@
+import QtQuick 2.6
+import QtQuick.Layouts 1.0
+import QtQuick.Controls 2.14
+import QtQuick.Controls.Material 2.0
+
+import org.electrum 1.0
+
+//import "controls"
+
+Item {
+    width: parent.width
+    height: rootLayout.height
+
+    property QtObject plugin
+
+    RowLayout {
+        id: rootLayout
+        Button {
+            text: 'Force upload'
+            enabled: !plugin.busy
+            onClicked: plugin.upload()
+        }
+        Button {
+            text: 'Force download'
+            enabled: !plugin.busy
+            onClicked: plugin.download()
+        }
+    }
+
+    Connections {
+        target: plugin
+        function onUploadSuccess() {
+            console.log('upload success')
+        }
+        function onUploadFailed() {
+            console.log('upload failed')
+        }
+        function onDownloadSuccess() {
+            console.log('download success')
+        }
+        function onDownloadFailed() {
+            console.log('download failed')
+        }
+    }
+}

electrum/plugins/labels/__init__.py

@@ -5,5 +5,5 @@ description = ' '.join([
     _("Save your wallet labels on a remote server, and synchronize them across multiple devices where you use Electrum."),
     _("Labels, transactions IDs and addresses are encrypted before they are sent to the remote server.")
 ])
-available_for = ['qt', 'kivy', 'cmdline']
+available_for = ['qt', 'qml', 'kivy', 'cmdline']
 

electrum/plugins/labels/qml.py

@@ -0,0 +1,138 @@
+import threading
+
+from PyQt5.QtCore import QObject, pyqtSignal, pyqtProperty, pyqtSlot
+
+from electrum.i18n import _
+from electrum.plugin import hook
+
+from electrum.gui.qml.qewallet import QEWallet
+
+from .labels import LabelsPlugin
+
+class Plugin(LabelsPlugin):
+
+    class QSignalObject(QObject):
+        pluginChanged = pyqtSignal()
+        pluginEnabledChanged = pyqtSignal()
+        labelsChanged = pyqtSignal()
+        busyChanged = pyqtSignal()
+        uploadSuccess = pyqtSignal()
+        uploadFailed = pyqtSignal()
+        downloadSuccess = pyqtSignal()
+        downloadFailed = pyqtSignal()
+
+        _busy = False
+
+        def __init__(self, plugin, parent = None):
+            super().__init__(parent)
+            self.plugin = plugin
+
+        @pyqtProperty(str, notify=pluginChanged)
+        def name(self): return _('Labels Plugin')
+
+        @pyqtProperty(bool, notify=busyChanged)
+        def busy(self): return self._busy
+
+        @pyqtProperty(bool, notify=pluginEnabledChanged)
+        def pluginEnabled(self): return self.plugin.is_enabled()
+
+        @pyqtSlot(result=str)
+        def settingsComponent(self): return '../../../plugins/labels/Labels.qml'
+
+        @pyqtSlot()
+        def upload(self):
+            assert self.plugin
+
+            self._busy = True
+            self.busyChanged.emit()
+
+            self.plugin.push_async()
+
+        def upload_finished(self, result):
+            if result:
+                self.uploadSuccess.emit()
+            else:
+                self.uploadFailed.emit()
+            self._busy = False
+            self.busyChanged.emit()
+
+        @pyqtSlot()
+        def download(self):
+            assert self.plugin
+
+            self._busy = True
+            self.busyChanged.emit()
+
+            self.plugin.pull_async()
+
+        def download_finished(self, result):
+            if result:
+                self.downloadSuccess.emit()
+            else:
+                self.downloadFailed.emit()
+            self._busy = False
+            self.busyChanged.emit()
+
+    def __init__(self, *args):
+        LabelsPlugin.__init__(self, *args)
+
+    @hook
+    def load_wallet(self, wallet):
+        self.logger.info(f'load_wallet hook for wallet {str(type(wallet))}')
+        self.start_wallet(wallet)
+
+    def push_async(self):
+        if not self._app.daemon.currentWallet:
+            self.logger.error('No current wallet')
+            self.so.download_finished(False)
+            return
+
+        wallet = self._app.daemon.currentWallet.wallet
+
+        def push_thread(wallet):
+            try:
+                self.push(wallet)
+                self.so.upload_finished(True)
+                self._app.appController.userNotify.emit(_('Labels uploaded'))
+            except Exception as e:
+                self.logger.error(repr(e))
+                self.so.upload_finished(False)
+                self._app.appController.userNotify.emit(repr(e))
+
+        threading.Thread(target=push_thread,args=[wallet]).start()
+
+    def pull_async(self):
+        if not self._app.daemon.currentWallet:
+            self.logger.error('No current wallet')
+            self.so.download_finished(False)
+            return
+
+        wallet = self._app.daemon.currentWallet.wallet
+        def pull_thread(wallet):
+            try:
+                self.pull(wallet, True)
+                self.so.download_finished(True)
+                self._app.appController.userNotify.emit(_('Labels downloaded'))
+            except Exception as e:
+                self.logger.error(repr(e))
+                self.so.download_finished(False)
+                self._app.appController.userNotify.emit(repr(e))
+
+        threading.Thread(target=pull_thread,args=[wallet]).start()
+
+
+    def on_pulled(self, wallet):
+        self.logger.info('on pulled')
+        _wallet = QEWallet.getInstanceFor(wallet)
+        self.logger.debug('wallet ' + ('found' if _wallet else 'not found'))
+        if _wallet:
+            _wallet.labelsUpdated.emit()
+
+    @hook
+    def init_qml(self, gui: 'ElectrumGui'):
+        self.logger.debug('init_qml hook called')
+        self.logger.debug(f'gui={str(type(gui))}')
+        self._app = gui.app
+        # important: QSignalObject needs to be parented, as keeping a ref
+        # in the plugin is not enough to avoid gc
+        self.so = Plugin.QSignalObject(self, self._app)

electrum/plugins/qml_test/qml.py

@@ -10,8 +10,6 @@ class Plugin(BasePlugin):
     def __init__(self, parent, config, name):
         BasePlugin.__init__(self, parent, config, name)
 
-    _logger = get_logger(__name__)
-
     @hook
     def init_qml(self, gui: 'ElectrumGui'):
-        self._logger.debug('init_qml hook called')
+        self.logger.debug('init_qml hook called')