'wx(U)LongLong << variant' type safety improved (now works even if variant has plain long value). Added << operator and WXVARIANT template specialization for wx(U)LongLong_t as well. Changed WX_PG_DECLARE/IMPLEMENT_VARIANT_DATA so that classname << variant can be customized.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55771 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/property.h

@@ -197,6 +197,15 @@
 
     Like wxStringProperty, but converts text to a signed long integer.
     wxIntProperty seamlessly supports 64-bit integers (ie. wxLongLong).
+    To safely convert variant to integer, use code like this:
+
+    @code
+        wxLongLong ll;
+        ll << property->GetValue();
+
+        // or
+        wxLongLong ll = propertyGrid->GetPropertyValueAsLong(property);
+    @endcode
 
     @subsection wxUIntProperty
 
@@ -205,7 +214,8 @@
     To set the globally used base, manipulate wxPG_UINT_BASE int
     attribute. Regardless of current prefix, understands (hex) values starting
     with both "0x" and "$".
-    wxUIntProperty seamlessly supports 64-bit unsigned integers (ie. wxULongLong).
+    Like wxIntProperty, wxUIntProperty seamlessly supports 64-bit unsigned
+    integers (ie. wxULongLong). Same wxVariant safety rules apply.
 
     @subsection wxFloatProperty