Fix building stc library with WXQT

When using MSVC compiler, wxUSE_GRAPHICS_DIRECT2D is automatically enabled in setup.h.
But it is only available with WXMSW toolkit, not WXGTK or WXQT.

src/stc/PlatWX.cpp

@@ -44,7 +44,11 @@
 #include "wx/stc/stc.h"
 #include "wx/stc/private.h"
 
-#if wxUSE_GRAPHICS_DIRECT2D
+#if defined(__WXMSW__) && wxUSE_GRAPHICS_DIRECT2D
+#define HAVE_DIRECTWRITE_TECHNOLOGY
+#endif
+
+#ifdef HAVE_DIRECTWRITE_TECHNOLOGY
 #include "ScintillaWX.h"
 #include <float.h>
 #include "wx/dcscreen.h"
@@ -165,11 +169,11 @@ void Font::Create(const FontParameters &fp) {
     wxFontWithAscent* newFont = new wxFontWithAscent(font);
     fid = newFont;
 
-#if wxUSE_GRAPHICS_DIRECT2D
+#ifdef HAVE_DIRECTWRITE_TECHNOLOGY
     if ( fp.technology == wxSTC_TECHNOLOGY_DIRECTWRITE ) {
         newFont->SetSurfaceFontData(new SurfaceFontDataD2D(fp));
     }
-#endif // wxUSE_GRAPHICS_DIRECT2D
+#endif // HAVE_DIRECTWRITE_TECHNOLOGY
 }
 
 
@@ -694,7 +698,7 @@ void SurfaceImpl::SetDBCSMode(int WXUNUSED(codePage)) {
     // dbcsMode = codePage == SC_CP_DBCS;
 }
 
-#if wxUSE_GRAPHICS_DIRECT2D
+#ifdef HAVE_DIRECTWRITE_TECHNOLOGY
 
 //----------------------------------------------------------------------
 // SurfaceFontDataD2D
@@ -1805,16 +1809,16 @@ void SurfaceD2D::DrawTextCommon(PRectangle rc, Font &font_, XYPOSITION ybase,
     }
 }
 
-#endif // wxUSE_GRAPHICS_DIRECT2D
+#endif // HAVE_DIRECTWRITE_TECHNOLOGY
 
 Surface *Surface::Allocate(int technology) {
     wxUnusedVar(technology);
 
-#if wxUSE_GRAPHICS_DIRECT2D
+#ifdef HAVE_DIRECTWRITE_TECHNOLOGY
     if ( technology == wxSTC_TECHNOLOGY_DIRECTWRITE ) {
         return new SurfaceD2D;
     }
-#endif // wxUSE_GRAPHICS_DIRECT2D
+#endif // HAVE_DIRECTWRITE_TECHNOLOGY
     return new SurfaceImpl;
 }
 

src/stc/ScintillaWX.cpp

@@ -825,7 +825,7 @@ sptr_t ScintillaWX::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam)
       }
 #endif
 
-#if wxUSE_GRAPHICS_DIRECT2D
+#if defined(__WXMSW__) && wxUSE_GRAPHICS_DIRECT2D
         case SCI_SETTECHNOLOGY:
             if ((wParam == SC_TECHNOLOGY_DEFAULT) || (wParam == SC_TECHNOLOGY_DIRECTWRITE)) {
                 if (technology != static_cast<int>(wParam)) {