Simplify receive tab:

- display receiving address in receiving tabs
 - display lightning invoice as 'address'
 - save last active tab in preferences

electrum/gui/qt/main_window.py

@@ -1049,6 +1049,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         grid.addLayout(buttons, 4, 3, 1, 2)
 
         self.receive_payreq_e = ButtonsTextEdit()
+        self.receive_payreq_e.setFont(QFont(MONOSPACE_FONT))
         self.receive_payreq_e.addCopyButton(self.app)
         self.receive_payreq_e.setReadOnly(True)
         self.receive_payreq_e.textChanged.connect(self.update_receive_qr)
@@ -1059,21 +1060,12 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         self.receive_qr.enterEvent = lambda x: self.app.setOverrideCursor(QCursor(Qt.PointingHandCursor))
         self.receive_qr.leaveEvent = lambda x: self.app.setOverrideCursor(QCursor(Qt.ArrowCursor))
 
-        def on_receive_address_changed():
-            addr = str(self.receive_address_e.text())
-            self.receive_address_widgets.setVisible(bool(addr))
-
-        msg = _('Bitcoin address where the payment should be received. Note that each payment request uses a different Bitcoin address.')
-        receive_address_label = HelpLabel(_('Receiving address'), msg)
-
         self.receive_address_e = ButtonsTextEdit()
         self.receive_address_e.setFont(QFont(MONOSPACE_FONT))
         self.receive_address_e.addCopyButton(self.app)
         self.receive_address_e.setReadOnly(True)
-        self.receive_address_e.textChanged.connect(on_receive_address_changed)
         self.receive_address_e.textChanged.connect(self.update_receive_address_styling)
-        self.receive_address_e.setMinimumHeight(6 * char_width_in_lineedit())
-        self.receive_address_e.setMaximumHeight(10 * char_width_in_lineedit())
+
         qr_show = lambda: self.show_qrcode(str(self.receive_address_e.text()), _('Receiving address'), parent=self)
         qr_icon = "qrcode_white.png" if ColorScheme.dark_scheme else "qrcode.png"
         self.receive_address_e.addButton(qr_icon, qr_show, _("Show as QR code"))
@@ -1083,34 +1075,21 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         from .request_list import RequestList
         self.request_list = RequestList(self)
 
+        receive_tabs = QTabWidget()
+        receive_tabs.addTab(self.receive_address_e, _('Address'))
+        receive_tabs.addTab(self.receive_payreq_e, _('Request'))
+        receive_tabs.addTab(self.receive_qr, _('QR Code'))
+        receive_tabs.setCurrentIndex(self.config.get('receive_tabs_index', 0))
+        receive_tabs.currentChanged.connect(lambda i: self.config.set_key('receive_tabs_index', i))
+
         # layout
         vbox_g = QVBoxLayout()
         vbox_g.addLayout(grid)
         vbox_g.addStretch()
-
-        receive_tabbed_widgets = QTabWidget()
-        receive_tabbed_widgets.addTab(self.receive_qr, 'QR Code')
-        receive_tabbed_widgets.addTab(self.receive_payreq_e, 'Text')
-
-        vbox_receive_address = QVBoxLayout()
-        vbox_receive_address.setContentsMargins(0, 0, 0, 0)
-        vbox_receive_address.setSpacing(0)
-        vbox_receive_address.addWidget(receive_address_label)
-        vbox_receive_address.addWidget(self.receive_address_e)
-        self.receive_address_widgets = QWidget()
-        self.receive_address_widgets.setLayout(vbox_receive_address)
-        size_policy = self.receive_address_widgets.sizePolicy()
-        size_policy.setRetainSizeWhenHidden(True)
-        self.receive_address_widgets.setSizePolicy(size_policy)
-
-        vbox_receive = QVBoxLayout()
-        vbox_receive.addWidget(receive_tabbed_widgets)
-        vbox_receive.addWidget(self.receive_address_widgets)
-
         hbox = QHBoxLayout()
         hbox.addLayout(vbox_g)
         hbox.addStretch()
-        hbox.addLayout(vbox_receive)
+        hbox.addWidget(receive_tabs)
 
         w = QWidget()
         w.searchable_list = self.request_list
@@ -1122,8 +1101,6 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         vbox.addWidget(self.request_list)
         vbox.setStretchFactor(self.request_list, 1000)
 
-        on_receive_address_changed()
-
         return w
 
     def delete_request(self, key):

electrum/gui/qt/request_list.py

@@ -93,7 +93,7 @@ class RequestList(MyTreeView):
             return
         if request_type == PR_TYPE_LN:
             self.parent.receive_payreq_e.setText(req.get('invoice'))
-            self.parent.receive_address_e.setText('')
+            self.parent.receive_address_e.setText(req.get('invoice'))
         else:
             self.parent.receive_payreq_e.setText(req.get('URI'))
             self.parent.receive_address_e.setText(req['address'])