Add __index__ to wx.WindowID, and __bool__ to wx.Region

(cherry picked from commit 9096426603)

etg/region.py

@@ -88,11 +88,12 @@ def run():
     c.mustHaveApp()
     c.find('operator++').ignore()
 
-    # SIP maps operator bool() to __int__, but Classic used __nonzero__. Does
-    # it make any difference either way?
     c.find('operator bool').ignore()
     c.addCppMethod('int', '__nonzero__', '()', 'return (int)self->operator bool();',
                    'Returns true while there are still rectangles available in the iteration.')
+    c.addCppMethod('int', '__bool__', '()', 'return (int)self->operator bool();',
+                   'Returns true while there are still rectangles available in the iteration.')
+
 
     c.addCppMethod('void', 'Next', '()', 'self->operator++();',
                    'Move the iterator to the next rectangle in the region.')

etg/windowid.py

@@ -73,10 +73,12 @@ def run():
             """)
 
     klass.addCppMethod('int', '__int__', '()',
-        doc="Alias for GetValue allowing the IDRef to be passed as the WindowID parameter when creating widgets or etc.",
-        body="""\
-            return self->GetValue();
-            """)
+        doc="Alias for GetValue allowing the IDRef to be passed as the WindowID parameter when creating widgets or other places an integer type is needed.",
+        body="return self->GetValue();")
+    klass.addCppMethod('int', '__index__', '()',
+        doc="See :meth:`__int__`",
+        body="return self->GetValue();")
+
 
     klass.addCppMethod('bool', '__eq__', '(wxWindowID id)', "return self->GetValue() == id;")
     klass.addCppMethod('bool', '__ne__', '(wxWindowID id)', "return self->GetValue() != id;")

unittests/test_windowid.py

@@ -75,6 +75,7 @@ class IdManagerTest(wtc.WidgetTestCase):
         val = ref1 <= ref2
         assert type(val) == bool
 
+
     def test_WindowIDRef02(self):
         d = {wx.NewIdRef(): 'one',
              wx.NewIdRef(): 'two'}
@@ -82,6 +83,24 @@ class IdManagerTest(wtc.WidgetTestCase):
         for k in keys:
             val = d[k]
 
+
+    def test_WindowIDRef03(self):
+        # Ensure wx.WindowIDRef can be converted to int without warning when
+        # making a call to warrped method. In Py3.8+ this means there needs to
+        # be an __index__ method.
+
+        # Turn warnings into exceptions so this test will fail if there is
+        # a warning
+        import warnings
+        warnings.simplefilter('error')
+
+        wid = wx.NewIdRef()
+        assert isinstance(wid, wx.WindowIDRef)
+
+        b = wx.Button(self.frame, wid, 'button')
+        assert b.GetId() == wid.GetId()
+
+
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