From b2a3647be73c953273b1850beb4665abd98194f6 Mon Sep 17 00:00:00 2001
From: Dmitri Bogomolov <4glitch@gmail.com>
Date: Mon, 11 Feb 2019 18:48:57 +0200
Subject: [PATCH] PyQt5 based qtpy fallback

---
 src/bitmessageqt/networkstatus.py |  4 ----
 src/bitmessageqt/support.py       |  2 +-
 src/depends.py                    | 12 +++++++++---
 src/fallback/__init__.py          | 27 +++++++++++++++++++++++++++
 src/tr.py                         |  1 +
 5 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/src/bitmessageqt/networkstatus.py b/src/bitmessageqt/networkstatus.py
index 671d6381..6748ae77 100644
--- a/src/bitmessageqt/networkstatus.py
+++ b/src/bitmessageqt/networkstatus.py
@@ -35,10 +35,6 @@ class NetworkStatus(QtWidgets.QWidget, RetranslateMixin):
             header.setSortIndicator(0, QtCore.Qt.AscendingOrder)
 
         self.startup = time.localtime()
-        self.labelStartupTime.setText(_translate(
-            "networkstatus", "Since startup on {0}").format(
-                l10n.formatTimestamp(self.startup))
-        )
 
         self.UISignalThread = UISignaler.get()
         self.UISignalThread.updateNumberOfMessagesProcessed.connect(
diff --git a/src/bitmessageqt/support.py b/src/bitmessageqt/support.py
index ca8695dd..56c4d479 100644
--- a/src/bitmessageqt/support.py
+++ b/src/bitmessageqt/support.py
@@ -126,7 +126,7 @@ def createSupportMessage(myapp):
 
     opensslversion = "%s (Python internal), %s (external for PyElliptic)" % (ssl.OPENSSL_VERSION, OpenSSL._version)
 
-    qtapi = os.environ['QT_API']
+    qtapi = os.environ.get('QT_API', 'fallback')
 
     frozen = "N/A"
     if paths.frozen:
diff --git a/src/depends.py b/src/depends.py
index 92c102b9..7af8ec1f 100755
--- a/src/depends.py
+++ b/src/depends.py
@@ -3,6 +3,8 @@ Utility functions to check the availability of dependencies
 and suggest how it may be installed
 """
 
+# flake8: noqa:E402
+
 import sys
 
 # Only really old versions of Python don't have sys.hexversion. We don't
@@ -363,9 +365,13 @@ def check_pyqt():
     PyQt 4.8 or later.
     """
     # pylint: disable=no-member
-    qtpy = try_import(
-        'qtpy',
-        'PyBitmessage requires qtpy, PyQt 4.8 or later and Qt 4.7 or later.')
+    try:
+        from fallback import qtpy
+    except ImportError:
+        logger.error(
+            'PyBitmessage requires qtpy, PyQt 4.8 or later and Qt 4.7 or later.'
+        )
+        qtpy = None
 
     if not qtpy:
         return False
diff --git a/src/fallback/__init__.py b/src/fallback/__init__.py
index 9a8d646f..8e48d76c 100644
--- a/src/fallback/__init__.py
+++ b/src/fallback/__init__.py
@@ -30,3 +30,30 @@ else:
         if data:
             hasher.update(data)
         return hasher
+
+try:
+    import qtpy
+except ImportError:
+    try:
+        from PyQt5 import QtCore, QtGui, QtWidgets, QtNetwork, uic
+    except ImportError:
+        qtpy = None
+    else:
+        import sys
+        import types
+
+        QtCore.Signal = QtCore.pyqtSignal
+        context = {
+            'API': 'pyqt5',  # for tr
+            'PYQT_VERSION': QtCore.PYQT_VERSION_STR,
+            'QT_VERSION': QtCore.QT_VERSION_STR,
+            'QtCore': QtCore,
+            'QtGui': QtGui,
+            'QtWidgets': QtWidgets,
+            'QtNetwork': QtNetwork,
+            'uic': uic
+        }
+        qtpy = types.ModuleType(
+            'qtpy', 'PyQt5 based dynamic fallback for qtpy')
+        qtpy.__dict__.update(context)
+        sys.modules['qtpy'] = qtpy
diff --git a/src/tr.py b/src/tr.py
index ddb06ec0..19ca4ff8 100644
--- a/src/tr.py
+++ b/src/tr.py
@@ -12,6 +12,7 @@ def _tr_dummy(context, text, disambiguation=None, n=None):
 
 if state.enableGUI and not state.curses:
     try:
+        from fallback import qtpy  # noqa:F401
         from qtpy import QtWidgets, QtCore, API
     except ImportError:
         _translate = _tr_dummy