Qt: move more code to main fn

scripts/joinmarket-qt.py

@@ -31,8 +31,6 @@ from PySide6.QtGui import *
 
 from PySide6.QtWidgets import *
 
-import PySide6.QtAsyncio as QtAsyncio
-
 if platform.system() == 'Windows':
     MONOSPACE_FONT = 'Lucida Console'
 elif platform.system() == 'Darwin':
@@ -2537,8 +2535,34 @@ async def get_wallet_printout(wallet_service):
     total_bal = walletview.get_fmt_balance() if wallet_service.synced else None
     return (rows, mbalances, xpubs, total_bal)
 
+
 ################################
 
+async def refuse_if_non_segwit_wallet():
+    # refuse to load non-segwit wallet (needs extra work in wallet-utils).
+    if not jm_single().config.get("POLICY", "segwit") == "true":
+        wallet_load_error = ''.join([
+            "Joinmarket-Qt only supports segwit based wallets, ",
+            "please edit the config file and remove any setting ",
+            "of the field `segwit` in the `POLICY` section."])
+        await JMQtMessageBox(None, wallet_load_error, mbtype='crit',
+                             title='Incompatible wallet type')
+        sys.exit(EXIT_FAILURE)
+
+
+async def onTabChange(i, tabWidget):
+    """ Respond to change of tab.
+    """
+    # TODO: hardcoded literal;
+    # note that this is needed for an auto-update
+    # of utxos on the Coins tab only atm.
+    if i == 2:
+        await tabWidget.widget(2).updateUtxos()
+
+
+async def main():
+    global logsdir, tumble_log, mainWindow
+
     parser = OptionParser(usage='usage: %prog [options]')
     add_base_options(parser)
     # wallet related base options are not applicable:
@@ -2558,7 +2582,8 @@ except Exception as e:
                  "or the rpc ports are not correct in your joinmarket.cfg or your ",
                  "bitcoin.conf file)."
                  ])
-    JMQtMessageBox(None, config_load_error, mbtype='crit', title='failed to load')
+        await JMQtMessageBox(None, config_load_error,
+                             mbtype='crit', title='failed to load')
         sys.exit(EXIT_FAILURE)
     # Only partial functionality (see wallet info, change config) is possible
     # without a blockchain interface.
@@ -2568,33 +2593,15 @@ if jm_single().bc_interface is None:
             "You will be able to see wallet information and change configuration ",
             "but other functionality will be limited. ",
             "Go to the 'Settings' tab and configure blockchain settings there."])
-    JMQtMessageBox(None, blockchain_warning, mbtype='warn',
-        title='No blockchain source')
+        await JMQtMessageBox(None, blockchain_warning,
+                             mbtype='warn', title='No blockchain source')
 
-async def refuse_if_non_segwit_wallet():
-    #refuse to load non-segwit wallet (needs extra work in wallet-utils).
-    if not jm_single().config.get("POLICY", "segwit") == "true":
-        wallet_load_error = ''.join([
-            "Joinmarket-Qt only supports segwit based wallets, ",
-            "please edit the config file and remove any setting ",
-            "of the field `segwit` in the `POLICY` section."])
-        await JMQtMessageBox(None, wallet_load_error, mbtype='crit',
-                             title='Incompatible wallet type')
-        sys.exit(EXIT_FAILURE)
+    await refuse_if_non_segwit_wallet()
 
     update_config_for_gui()
 
     check_and_start_tor()
 
-async def onTabChange(i, tabWidget):
-    """ Respond to change of tab.
-    """
-    # TODO: hardcoded literal;
-    # note that this is needed for an auto-update
-    # of utxos on the Coins tab only atm.
-    if i == 2:
-        await tabWidget.widget(2).updateUtxos()
-
     # to allow testing of confirm/unconfirm callback for multiple txs
     if isinstance(jm_single().bc_interface, RegtestBitcoinCoreInterface):
         jm_single().bc_interface.tick_forward_chain_interval = 10
@@ -2606,16 +2613,7 @@ if isinstance(jm_single().bc_interface, RegtestBitcoinCoreInterface):
     logsdir = os.path.join(jm_single().datadir, "logs")
     # tumble log will not always be used, but is made available anyway:
     tumble_log = get_tumble_log(logsdir)
-#ignored makers list persisted across entire app run
-ignored_makers = []
-appWindowTitle = 'JoinMarketQt'
-from twisted.internet import reactor
-reactor.runReturn()
-mainWindow = JMMainWindow(reactor)
-
 
-async def main():
-    await refuse_if_non_segwit_wallet()
     tabWidget = QTabWidget(mainWindow)
     jm_wallet_tab = JMWalletTab()
     await jm_wallet_tab.async_initUI()
@@ -2656,7 +2654,21 @@ async def main():
     set_custom_stop_reactor(qt_shutdown)
 
     # Upon launching the app, ask the user to choose a wallet to open
-    await mainWindow.openWallet()
+    # await mainWindow.openWallet()
+
+
+logsdir = None
+tumble_log = None
+# ignored makers list persisted across entire app run
+ignored_makers = []
+appWindowTitle = 'JoinMarketQt'
+
+from twisted.internet import reactor
+mainWindow = JMMainWindow(reactor)
+#mainWindow.show()
+reactor.runReturn()
 
-QtAsyncio.run(coro=main(), handle_sigint=True, debug=True)
-# sys.exit(app.exec_())  # FIXME?
+import PySide6.QtAsyncio as QtAsyncio
+exit_status = QtAsyncio.run(
+    coro=main(), keep_running=True, handle_sigint=True, debug=False)
+sys.exit(exit_status)