made SameAs() and operator==() const, added operator!=() and docs for it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17756 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/filename.tex

@@ -598,7 +598,7 @@ Deletes the specified directory from the file system.
 
 \membersection{wxFileName::SameAs}\label{wxfilenamesameas}
 
-\func{bool}{SameAs}{\param{const wxFileName\& }{filepath}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
+\constfunc{bool}{SameAs}{\param{const wxFileName\& }{filepath}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
 
 Compares the filename using the rules of this platform.
 
@@ -674,9 +674,19 @@ Assigns the new value to this filename object.
 
 \membersection{wxFileName::operator==}\label{wxfilenameoperatorequal}
 
-\func{bool operator}{operator==}{\param{const wxFileName\& }{filename}}
+\constfunc{bool operator}{operator==}{\param{const wxFileName\& }{filename}}
 
-\func{bool operator}{operator==}{\param{const wxString\& }{filename}}
+\constfunc{bool operator}{operator==}{\param{const wxString\& }{filename}}
 
-Returns {\tt TRUE} if the filenames are equal for the native file format.
+Returns {\tt TRUE} if the filenames are equal. The string {\it filenames} is
+interpreted as a path in the native filename format.
+
+\membersection{wxFileName::operator!=}\label{wxfilenameoperatornotequal}
+
+\constfunc{bool operator}{operator!=}{\param{const wxFileName\& }{filename}}
+
+\constfunc{bool operator}{operator!=}{\param{const wxString\& }{filename}}
+
+Returns {\tt TRUE} if the filenames are different. The string {\it filenames}
+is interpreted as a path in the native filename format.
 

include/wx/filename.h

@@ -274,14 +274,21 @@ public:
 
     // Comparison
 
-        // compares with the rules of this platform
-    bool SameAs(const wxFileName &filepath,
-                wxPathFormat format = wxPATH_NATIVE);
+        // compares with the rules of the given platforms format
+    bool SameAs(const wxFileName& filepath,
+                wxPathFormat format = wxPATH_NATIVE) const;
 
-        // uses the current platform settings
-    bool operator==(const wxFileName& filename) { return SameAs(filename); }
-    bool operator==(const wxString& filename)
-        { return *this == wxFileName(filename); }
+        // compare with another filename object
+    bool operator==(const wxFileName& filename) const
+        { return SameAs(filename); }
+    bool operator!=(const wxFileName& filename) const
+        { return !SameAs(filename); }
+
+        // compare with a filename string interpreted as a native file name
+    bool operator==(const wxString& filename) const
+        { return SameAs(wxFileName(filename)); }
+    bool operator!=(const wxString& filename) const
+        { return !SameAs(wxFileName(filename)); }
 
         // are the file names of this type cases sensitive?
     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );

src/common/filename.cpp

@@ -1022,7 +1022,7 @@ bool wxFileName::MakeRelativeTo(const wxString& pathBase, wxPathFormat format)
 // filename kind tests
 // ----------------------------------------------------------------------------
 
-bool wxFileName::SameAs(const wxFileName &filepath, wxPathFormat format)
+bool wxFileName::SameAs(const wxFileName& filepath, wxPathFormat format) const
 {
     wxFileName fn1 = *this,
                fn2 = filepath;