added wxRect::operator+() and *() (union and intersection); also made other operators friends instead of members (patch 1589175)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46191 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/geometry/rect.cpp

@@ -129,6 +129,14 @@ void RectTestCase::Operators()
             ( data.GetSecond() + data.GetFirst() ) == data.GetResult()
         );
     }
+
+    // test operator*() which returns the intersection of two rectangles
+    wxRect r1 = wxRect(0, 2, 3, 4);
+    wxRect r2 = wxRect(1, 2, 7, 8);
+    r1 *= r2;
+    CPPUNIT_ASSERT(wxRect(1, 2, 2, 4) == r1);
+
+    CPPUNIT_ASSERT( (r1 * wxRect()).IsEmpty() );
 }
 
 void RectTestCase::Union()