qml: add initial generic listmodel filter QEFilterProxyModel

electrum/gui/qml/components/Channels.qml

@@ -78,7 +78,7 @@ Pane {
                     Layout.preferredWidth: parent.width
                     Layout.fillHeight: true
                     clip: true
-                    model: Daemon.currentWallet.channelModel
+                    model: Daemon.currentWallet.channelModel.filterModel('is_backup', false)
 
                     delegate: ChannelDelegate {
                         onClicked: {
@@ -126,10 +126,9 @@ Pane {
 
         FlatButton {
             Layout.fillWidth: true
-            text: qsTr('Import channel backup')
+            text: qsTr('Channel backups')
             onClicked: {
-                var dialog = importChannelBackupDialog.createObject(root)
-                dialog.open()
+                app.stack.push(Qt.resolvedUrl('ChannelBackups.qml'))
             }
             icon.source: '../../icons/file.png'
         }

electrum/gui/qml/qeapp.py

@@ -8,7 +8,8 @@ import threading
 import asyncio
 from typing import TYPE_CHECKING
 
-from PyQt5.QtCore import pyqtSlot, pyqtSignal, pyqtProperty, QObject, QUrl, QLocale, qInstallMessageHandler, QTimer
+from PyQt5.QtCore import (pyqtSlot, pyqtSignal, pyqtProperty, QObject, QUrl, QLocale,
+                          qInstallMessageHandler, QTimer, QSortFilterProxyModel)
 from PyQt5.QtGui import QGuiApplication, QFontDatabase
 from PyQt5.QtQml import qmlRegisterType, qmlRegisterUncreatableType, QQmlApplicationEngine
 
@@ -38,6 +39,7 @@ from .qelnpaymentdetails import QELnPaymentDetails
 from .qechanneldetails import QEChannelDetails
 from .qeswaphelper import QESwapHelper
 from .qewizard import QENewWalletWizard, QEServerConnectWizard
+from .qemodelfilter import QEFilterProxyModel
 
 if TYPE_CHECKING:
     from electrum.simple_config import SimpleConfig
@@ -297,6 +299,8 @@ class ElectrumQmlApplication(QGuiApplication):
         qmlRegisterUncreatableType(QEAmount, 'org.electrum', 1, 0, 'Amount', 'Amount can only be used as property')
         qmlRegisterUncreatableType(QENewWalletWizard, 'org.electrum', 1, 0, 'NewWalletWizard', 'NewWalletWizard can only be used as property')
         qmlRegisterUncreatableType(QEServerConnectWizard, 'org.electrum', 1, 0, 'ServerConnectWizard', 'ServerConnectWizard can only be used as property')
+        qmlRegisterUncreatableType(QEFilterProxyModel, 'org.electrum', 1, 0, 'FilterProxyModel', 'FilterProxyModel can only be used as property')
+        qmlRegisterUncreatableType(QSortFilterProxyModel, 'org.electrum', 1, 0, 'QSortFilterProxyModel', 'QSortFilterProxyModel can only be used as property')
 
         self.engine = QQmlApplicationEngine(parent=self)
 

electrum/gui/qml/qechannellistmodel.py

@@ -8,6 +8,7 @@ from electrum.util import Satoshis
 
 from .qetypes import QEAmount
 from .util import QtEventListener, qt_event_listener
+from .qemodelfilter import QEFilterProxyModel
 
 class QEChannelListModel(QAbstractListModel, QtEventListener):
     _logger = get_logger(__name__)
@@ -165,3 +166,11 @@ class QEChannelListModel(QAbstractListModel, QtEventListener):
                 self.countChanged.emit()
                 return
             i = i + 1
+
+    @pyqtSlot(str, 'QVariant', result=QEFilterProxyModel)
+    def filterModel(self, role, match):
+        self._filterModel = QEFilterProxyModel(self, self)
+        self._filterModel.setFilterRole(QEChannelListModel._ROLE_RMAP[role])
+        self._filterModel.setFilterValue(match)
+        return self._filterModel
+

electrum/gui/qml/qemodelfilter.py

@@ -0,0 +1,27 @@
+from PyQt5.QtCore import QSortFilterProxyModel
+
+from electrum.logging import get_logger
+
+class QEFilterProxyModel(QSortFilterProxyModel):
+    _logger = get_logger(__name__)
+
+    _filter_value = None
+
+    def __init__(self, parent_model, parent=None):
+        super().__init__(parent)
+        self.setSourceModel(parent_model)
+
+    def isCustomFilter(self):
+        return self._filter_value is not None
+
+    def setFilterValue(self, filter_value):
+        self._filter_value = filter_value
+
+    def filterAcceptsRow(self, s_row, s_parent):
+        if not self.isCustomFilter:
+            return super().filterAcceptsRow(s_row, s_parent)
+
+        parent_model = self.sourceModel()
+        d = parent_model.data(parent_model.index(s_row, 0, s_parent), self.filterRole())
+        # self._logger.debug(f'DATA in FilterProxy is {repr(d)}')
+        return True if self._filter_value is None else d == self._filter_value