Replace Fl_Window_Driver::is_a_rescale() by Fl_Window::is_a_rescale()

so it can be called by any user code.

FL/Fl_Window.H

@@ -541,6 +541,7 @@ public:
   void shape(const Fl_Image& b) ;
   const Fl_Image *shape();
   int screen_num();
+  static bool is_a_rescale();
 };
 
 #endif

src/Fl_Double_Window.cxx

@@ -54,7 +54,7 @@ void Fl_Double_Window::resize(int X,int Y,int W,int H) {
   int oh = h();
   Fl_Window::resize(X,Y,W,H);
   Fl_X *myi = Fl_X::i(this);
-  if (myi && Fl_Window_Driver::driver(this)->other_xid && (ow < w() || oh < h() || Fl_Window_Driver::is_a_rescale()))
+  if (myi && Fl_Window_Driver::driver(this)->other_xid && (ow < w() || oh < h() || is_a_rescale()))
     Fl_Window_Driver::driver(this)->destroy_double_buffer();
 }
 

src/Fl_Gl_Window.cxx

@@ -261,7 +261,7 @@ void Fl_Gl_Window::resize(int X,int Y,int W,int H) {
 //  printf("Fl_Gl_Window::resize(X=%d, Y=%d, W=%d, H=%d)\n", X, Y, W, H);
 //  printf("current: x()=%d, y()=%d, w()=%d, h()=%d\n", x(), y(), w(), h());
 
-  int is_a_resize = (W != Fl_Widget::w() || H != Fl_Widget::h() || Fl_Window_Driver::is_a_rescale());
+  int is_a_resize = (W != Fl_Widget::w() || H != Fl_Widget::h() || is_a_rescale());
   if (is_a_resize) valid(0);
   pGlWindowDriver->resize(is_a_resize, W, H);
   Fl_Window::resize(X,Y,W,H);

src/Fl_Group.cxx

@@ -708,7 +708,7 @@ void Fl_Group::resize(int X, int Y, int W, int H) {
 
   Fl_Widget::resize(X, Y, W, H); // make new xywh values visible for children
 
-  if ((!resizable() || (dw==0 && dh==0 )) && !Fl_Window_Driver::is_a_rescale()) {
+  if ((!resizable() || (dw==0 && dh==0 )) && !Fl_Window::is_a_rescale()) {
 
     if (!as_window()) {
       Fl_Widget*const* a = array();

src/Fl_Window.cxx

@@ -689,6 +689,9 @@ void Fl_Window::shape(const Fl_Image& img) {pWindowDriver->shape(&img);}
 /** Returns the image controlling the window shape or NULL */
 const Fl_Image* Fl_Window::shape() {return pWindowDriver->shape();}
 
+/** Returns true when a window is being rescaled */
+bool Fl_Window::is_a_rescale() {return Fl_Window_Driver::is_a_rescale_;}
+
 //
 // End of "$Id$".
 //

src/Fl_Window_Driver.H

@@ -69,7 +69,6 @@ public:
   Fl_Offscreen other_xid; // offscreen bitmap (overlay and double-buffered windows)
   virtual int screen_num();
   virtual void screen_num(int) {}
-  static bool is_a_rescale() {return is_a_rescale_;};
 
 
   // --- frequently used accessors to public window data

src/Fl_cocoa.mm

@@ -3296,7 +3296,7 @@ void Fl_Cocoa_Window_Driver::resize(int X, int Y, int W, int H) {
   } else {
     NSPoint pt = FLTKtoCocoa(pWindow, X, Y, H);
     FLWindow *xid = fl_xid(pWindow);
-    if (W != w() || H != h() || is_a_rescale()) {
+    if (W != w() || H != h() || Fl_Window::is_a_rescale()) {
       NSRect r;
       float s = Fl::screen_driver()->scale(screen_num());
       int bt = get_window_frame_sizes(pWindow);

src/Fl_win32.cxx

@@ -1834,11 +1834,11 @@ int Fl_WinAPI_Window_Driver::fake_X_wm(int &X, int &Y, int &bt, int &bx, int &by
 void Fl_WinAPI_Window_Driver::resize(int X, int Y, int W, int H) {
 //fprintf(stderr, "resize w()=%d W=%d h()=%d H=%d\n",pWindow->w(), W,pWindow->h(), H);
   UINT flags = SWP_NOSENDCHANGING | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOOWNERZORDER;
-  int is_a_resize = (W != w() || H != h() || is_a_rescale());
+  int is_a_resize = (W != w() || H != h() || Fl_Window::is_a_rescale());
   int resize_from_program = (pWindow != resize_bug_fix);
   if (!resize_from_program)
     resize_bug_fix = 0;
-  if (X != x() || Y != y() || is_a_rescale()) {
+  if (X != x() || Y != y() || Fl_Window::is_a_rescale()) {
     force_position(1);
   } else {
     if (!is_a_resize)

src/Fl_x.cxx

@@ -2252,8 +2252,8 @@ int fl_handle(const XEvent& thisevent)
 ////////////////////////////////////////////////////////////////
 
 void Fl_X11_Window_Driver::resize(int X,int Y,int W,int H) {
-  int is_a_move = (X != x() || Y != y() || is_a_rescale());
-  int is_a_resize = (W != w() || H != h() || is_a_rescale());
+  int is_a_move = (X != x() || Y != y() || Fl_Window::is_a_rescale());
+  int is_a_resize = (W != w() || H != h() || Fl_Window::is_a_rescale());
   int resize_from_program = (pWindow != resize_bug_fix);
   if (!resize_from_program) resize_bug_fix = 0;
   if (is_a_move && resize_from_program) force_position(1);

src/drivers/Android/Fl_Android_Window_Driver.cxx

@@ -124,8 +124,8 @@ void Fl_Android_Window_Driver::make_current()
 
 void Fl_Android_Window_Driver::resize(int X,int Y,int W,int H)
 {
-  int is_a_resize = (W != w() || H != h() || is_a_rescale());
-  if (X != x() || Y != y() || is_a_rescale()) {
+  int is_a_resize = (W != w() || H != h() || Fl_Window::is_a_rescale());
+  if (X != x() || Y != y() || Fl_Window::is_a_rescale()) {
     force_position(1);
   } else {
     if (!is_a_resize)