Moved all the coordinate system calculation to wxDCBase

and thus removed all the duplicated code in all wxDC
   classes.
  Problematic is that wxSVGFileDC and wxPostscriptDC inherit
   from wxDC and therefore include platform specific code
   (also before this change) so I chose to override all
   SetLogicalOrigin() etc. methods in these classes and
   call their wxDCBase methods thereby circumventing the
   platform dependent code.
  I'm afraid the Mac code will require updating, too.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45752 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dc.h

@@ -78,22 +78,14 @@ public:
     virtual int GetDepth() const;
     virtual wxSize GetPPI() const;
 
-    virtual wxCoord DeviceToLogicalX(wxCoord x) const;
-    virtual wxCoord DeviceToLogicalY(wxCoord y) const;
-    virtual wxCoord DeviceToLogicalXRel(wxCoord x) const;
-    virtual wxCoord DeviceToLogicalYRel(wxCoord y) const;
-    virtual wxCoord LogicalToDeviceX(wxCoord x) const;
-    virtual wxCoord LogicalToDeviceY(wxCoord y) const;
-    virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
-    virtual wxCoord LogicalToDeviceYRel(wxCoord y) const ;
 
     virtual void SetMapMode(int mode);
     virtual void SetUserScale(double x, double y);
-    virtual void SetSystemScale(double x, double y);
     virtual void SetLogicalScale(double x, double y);
     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
+    
     virtual void SetLogicalFunction(int function);
 
     // implementation from now on
@@ -171,6 +163,8 @@ protected:
     // classes
     wxDC() { Init(); }
 
+    void RealizeScaleAndOrigin();
+
     virtual void DoGetTextExtent(const wxString& string,
                                  wxCoord *x, wxCoord *y,
                                  wxCoord *descent = NULL,