a better way to fixs the compilation problem on Solaris.

git-svn-id: http://root.cern.ch/svn/root/trunk@19060 27541ba8-7e3a-0410-8455-c3a389f83636

gl/inc/TGLContext.h

-// @(#)root/gl:$Name:  $:$Id: TGLContext.h,v 1.5 2007/06/18 07:02:16 brun Exp $
+// @(#)root/gl:$Name:  $:$Id: TGLContext.h,v 1.6 2007/06/18 09:44:25 brun Exp $
 // Author:  Timur Pocheptsov, Jun 2007
 
 #include <utility>
@@ -24,18 +24,17 @@ class TGLContextIdentity;
 #include "Rtypes.h"
 #endif
 
+class TGLContextPrivate;
 class TGLPaintDevice;
 //class TGLPBuffer;
 class TGLWidget;
 
 class TGLContext {
-   class TGLContextPrivate;
-   friend class TGLContextPrivate; // for solaris cc
+   friend class TGLContextPrivate;
    friend class TGLWidget;
 //   friend class TGLPBuffer;
 private:
    TGLPaintDevice *fDevice;
-   class TGLContextPrivate;
    TGLContextPrivate *fPimpl;
 
    Bool_t fFromCtor;//To prohibit user's calls of SetContext.

gl/inc/TGLContextPrivate.h

-// @(#)root/gl:$Name:  $:$Id: TGLContextPrivate.h,v 1.3 2007/06/18 07:06:17 brun Exp $
+// @(#)root/gl:$Name:  $:$Id: TGLContextPrivate.h,v 1.4 2007/06/18 07:11:50 brun Exp $
 // Author:  Timur Pocheptsov, Matevz Tadel, June 2007
 
 #ifndef ROOT_TGLContextPrivate
@@ -15,7 +15,7 @@
 
 #ifdef WIN32
 
-class TGLContext::TGLContextPrivate {
+class TGLContextPrivate {
 public:
    HWND        fHWND;
    HDC         fHDC;
@@ -42,7 +42,7 @@ private:
 
 #else
 
-class TGLContext::TGLContextPrivate {
+class TGLContextPrivate {
 public:
    Display     *fDpy;
    XVisualInfo *fVisualInfo;

gl/src/TGLContextPrivate.cxx

-// @(#)root/gl:$Name$:$Id$
+// @(#)root/gl:$Name:  $:$Id: TGLContextPrivate.cxx,v 1.1 2007/06/18 07:02:16 brun Exp $
 // Author:  Timur Pocheptsov, Jun 2007
 
 #ifndef WIN32
@@ -8,7 +8,7 @@
 #include "TGLContextPrivate.h"
 
 //______________________________________________________________________________
-void TGLContext::TGLContextPrivate::RegisterContext(TGLContext *ctx)
+void TGLContextPrivate::RegisterContext(TGLContext *ctx)
 {
    //Register gl-context to find it later as current (GetCurrentContext)
    if (ctx->IsValid())
@@ -16,7 +16,7 @@ void TGLContext::TGLContextPrivate::RegisterContext(TGLContext *ctx)
 }
 
 //______________________________________________________________________________
-void TGLContext::TGLContextPrivate::RemoveContext(TGLContext *ctx)
+void TGLContextPrivate::RemoveContext(TGLContext *ctx)
 {
    //Un-register deleted context.
    if (ctx->IsValid())
@@ -25,10 +25,10 @@ void TGLContext::TGLContextPrivate::RemoveContext(TGLContext *ctx)
 
 #ifdef WIN32
 
-std::map<HGLRC, TGLContext *> TGLContext::TGLContextPrivate::fContexts;
+std::map<HGLRC, TGLContext *> TGLContextPrivate::fContexts;
 
 //______________________________________________________________________________
-TGLContext *TGLContext::TGLContextPrivate::GetCurrentContext()
+TGLContext *TGLContextPrivate::GetCurrentContext()
 {
    //Ask wgl what HGLRC is current and look up corresponding TGLContext.
    HGLRC glContext = wglGetCurrentContext();
@@ -42,10 +42,10 @@ TGLContext *TGLContext::TGLContextPrivate::GetCurrentContext()
 
 #else
 
-std::map<GLXContext, TGLContext *> TGLContext::TGLContextPrivate::fContexts;
+std::map<GLXContext, TGLContext *> TGLContextPrivate::fContexts;
 
 //______________________________________________________________________________
-TGLContext *TGLContext::TGLContextPrivate::GetCurrentContext()
+TGLContext *TGLContextPrivate::GetCurrentContext()
 {
    //Ask wgl what HGLRC is current and look up corresponding TGLContext.
    GLXContext glContext = glXGetCurrentContext();