Add operator/(wxSize, double)

For some reason, while both operator*(wxSize, double) and
wxSize::operator/=(double) existed, this one did not, which was
unexpected, so add it too.

include/wx/gdicmn.h

@@ -435,6 +435,11 @@ inline wxSize operator*(unsigned long i, const wxSize& s)
     return wxSize(int(s.x * i), int(s.y * i));
 }
 
+inline wxSize operator/(const wxSize& s, double i)
+{
+    return wxSize(wxRound(s.x / i), wxRound(s.y / i));
+}
+
 inline wxSize operator*(const wxSize& s, double i)
 {
     return wxSize(wxRound(s.x * i), wxRound(s.y * i));

interface/wx/gdicmn.h

@@ -1064,12 +1064,19 @@ public:
     /**
         @name Miscellaneous operators
 
+        Sizes can be added to or subtracted from each other or divided or
+        multiplied by a number.
+
         Note that these operators are documented as class members
         (to make them easier to find) but, as their prototype shows,
         they are implemented as global operators; note that this is
         transparent to the user but it helps to understand why the
         following functions are documented to take the wxSize they
         operate on as an explicit argument.
+
+        Also note that using @c double factor may result in rounding errors,
+        as wxSize always stores @c int coordinates and the result is always
+        rounded.
     */
     //@{
     wxSize& operator=(const wxSize& sz);
@@ -1083,10 +1090,15 @@ public:
     wxSize& operator -=(const wxSize& sz);
 
     wxSize operator /(const wxSize& sz, int factor);
+    wxSize operator /(const wxSize& sz, double factor);
     wxSize operator *(const wxSize& sz, int factor);
+    wxSize operator *(const wxSize& sz, double factor);
     wxSize operator *(int factor, const wxSize& sz);
+    wxSize operator *(double factor, const wxSize& sz);
     wxSize& operator /=(int factor);
+    wxSize& operator /=(double factor);
     wxSize& operator *=(int factor);
+    wxSize& operator *=(double factor);
     //@}
 };
 

tests/geometry/size.cpp

@@ -48,4 +48,6 @@ TEST_CASE("wxSize::Operators", "[size]")
     CHECK( s3 == wxSize(2, 4) );
     s3 /= 2;
     CHECK( s3 == s1 );
+
+    CHECK( wxSize(6, 9) / 1.5 == wxSize(4, 6) );
 }