qml: add expiry timers to update status string in InvoiceDialog and ReceiveDialog

electrum/gui/qml/components/ReceiveDialog.qml

@@ -207,10 +207,17 @@ ElDialog {
 
                 GridLayout {
                     columns: 2
-                    visible: request.message || !request.amount.isEmpty
+                    // visible: request.message || !request.amount.isEmpty
                     Layout.maximumWidth: buttons.width
                     Layout.alignment: Qt.AlignHCenter
 
+                    Label {
+                        text: qsTr('Status')
+                        color: Material.accentColor
+                    }
+                    Label {
+                        text: request.status_str
+                    }
                     Label {
                         visible: request.message
                         text: qsTr('Message')
@@ -234,7 +241,7 @@ ElDialog {
                 }
 
                 Rectangle {
-                    visible: request.message || !request.amount.isEmpty
+                    // visible: request.message || !request.amount.isEmpty
                     height: 1
                     Layout.alignment: Qt.AlignHCenter
                     Layout.preferredWidth: buttons.width

electrum/gui/qml/qeinvoice.py

@@ -2,14 +2,14 @@ import threading
 import asyncio
 from urllib.parse import urlparse
 
-from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject, Q_ENUMS
+from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject, Q_ENUMS, QTimer
 
 from electrum import bitcoin
 from electrum import lnutil
 from electrum.i18n import _
 from electrum.invoices import Invoice
 from electrum.invoices import (PR_UNPAID, PR_EXPIRED, PR_UNKNOWN, PR_PAID, PR_INFLIGHT,
-                               PR_FAILED, PR_ROUTING, PR_UNCONFIRMED)
+                               PR_FAILED, PR_ROUTING, PR_UNCONFIRMED, LN_EXPIRY_NEVER)
 from electrum.lnaddr import LnInvoiceException
 from electrum.logging import get_logger
 from electrum.transaction import PartialTxOutput
@@ -20,6 +20,7 @@ from electrum.bitcoin import COIN
 
 from .qetypes import QEAmount
 from .qewallet import QEWallet
+from .util import status_update_timer_interval
 
 class QEInvoice(QObject):
     class Type:
@@ -140,6 +141,10 @@ class QEInvoiceParser(QEInvoice):
         self._amount = QEAmount()
         self._userinfo = ''
 
+        self._timer = QTimer(self)
+        self._timer.setSingleShot(True)
+        self._timer.timeout.connect(self.updateStatusString)
+
         self.clear()
 
     @pyqtProperty(int, notify=invoiceChanged)
@@ -190,6 +195,10 @@ class QEInvoiceParser(QEInvoice):
         self.determine_can_pay()
         self.invoiceChanged.emit()
 
+    @pyqtProperty('quint64', notify=invoiceChanged)
+    def time(self):
+        return self._effectiveInvoice.time if self._effectiveInvoice else 0
+
     @pyqtProperty('quint64', notify=invoiceChanged)
     def expiration(self):
         return self._effectiveInvoice.exp if self._effectiveInvoice else 0
@@ -268,6 +277,21 @@ class QEInvoiceParser(QEInvoice):
         self.invoiceChanged.emit()
         self.statusChanged.emit()
 
+        self.set_status_timer()
+
+    def set_status_timer(self):
+        if self.status != PR_EXPIRED:
+            if self.expiration > 0 and self.expiration != LN_EXPIRY_NEVER:
+                interval = status_update_timer_interval(self.time + self.expiration)
+                if interval > 0:
+                    self._timer.setInterval(interval)  # msec
+                    self._timer.start()
+
+    @pyqtSlot()
+    def updateStatusString(self):
+        self.statusChanged.emit()
+        self.set_status_timer()
+
     def determine_can_pay(self):
         self.canPay = False
         self.userinfo = ''

electrum/gui/qml/qerequestdetails.py

@@ -1,5 +1,3 @@
-from time import time
-
 from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject, QTimer, Q_ENUMS
 
 from electrum.logging import get_logger
@@ -8,7 +6,7 @@ from electrum.invoices import (PR_UNPAID, PR_EXPIRED, PR_UNKNOWN, PR_PAID, PR_IN
 
 from .qewallet import QEWallet
 from .qetypes import QEAmount
-from .util import QtEventListener, event_listener
+from .util import QtEventListener, event_listener, status_update_timer_interval
 
 class QERequestDetails(QObject, QtEventListener):
 
@@ -38,6 +36,10 @@ class QERequestDetails(QObject, QtEventListener):
         self._timer = None
         self._amount = None
 
+        self._timer = QTimer(self)
+        self._timer.setSingleShot(True)
+        self._timer.timeout.connect(self.updateStatusString)
+
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 
@@ -134,31 +136,16 @@ class QERequestDetails(QObject, QtEventListener):
         self._amount = QEAmount(from_invoice=self._req)
 
         self.detailsChanged.emit()
-        self.initStatusStringTimer()
+        self.statusChanged.emit()
+        self.set_status_timer()
 
-    def initStatusStringTimer(self):
+    def set_status_timer(self):
         if self.status == PR_UNPAID:
             if self.expiration > 0 and self.expiration != LN_EXPIRY_NEVER:
-                self._timer = QTimer(self)
-                self._timer.setSingleShot(True)
-                self._timer.timeout.connect(self.updateStatusString)
-
-                # very roughly according to util.time_difference
-                exp_in = int(self.expiration - time())
-                exp_in_min = int(exp_in/60)
-
-                interval = 0
-                if exp_in < 0:
-                    interval = 0
-                if exp_in_min < 2:
-                    interval = 1000
-                elif exp_in_min < 90:
-                    interval = 1000 * 60
-                elif exp_in_min < 1440:
-                    interval = 1000 * 60 * 60
-
+                self._logger.debug(f'set_status_timer, expiration={self.expiration}')
+                interval = status_update_timer_interval(self.expiration)
                 if interval > 0:
-                    self._logger.debug(f'setting status update timer to {interval}, req expires in {exp_in} seconds')
+                    self._logger.debug(f'setting status update timer to {interval}')
                     self._timer.setInterval(interval)  # msec
                     self._timer.start()
 
@@ -166,5 +153,5 @@ class QERequestDetails(QObject, QtEventListener):
     @pyqtSlot()
     def updateStatusString(self):
         self.statusChanged.emit()
-        self.initStatusStringTimer()
+        self.set_status_timer()
 

electrum/gui/qml/util.py

@@ -1,4 +1,5 @@
 from functools import wraps
+from time import time
 
 from PyQt5.QtCore import pyqtSignal
 
@@ -27,3 +28,22 @@ def qt_event_listener(func):
     def decorator(self, *args):
         self.qt_callback_signal.emit( (func,) + args)
     return decorator
+
+# return delay in msec when expiry time string should be updated
+# returns 0 when expired or expires > 1 day away (no updates needed)
+def status_update_timer_interval(exp):
+    # very roughly according to util.time_difference
+    exp_in = int(exp - time())
+    exp_in_min = int(exp_in/60)
+
+    interval = 0
+    if exp_in < 0:
+        interval = 0
+    elif exp_in_min < 2:
+        interval = 1000
+    elif exp_in_min < 90:
+        interval = 1000 * 60
+    elif exp_in_min < 1440:
+        interval = 1000 * 60 * 60
+
+    return interval