5 files changed, 21 insertions, 0 deletions
diff --git a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
index 36be7ee7d..86cf1c8d1 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
+++ b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
@@ -65,6 +65,8 @@ public:
   virtual void draw();
   // that one is implemented in Fl_Cocoa.mm because it uses Objective-c
   virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
+  //this one is in Fl_cocoa.mm because it uses Objective-c
+  virtual void wait_for_expose();
 };
 
 
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
index 53c00cad4..7000356e3 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
@@ -75,6 +75,7 @@ public:
   void icons(HICON big_icon, HICON small_icon);
   // this one is implemented in Fl_win32.cxx
   virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
+  virtual void wait_for_expose();
 };
 
 
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
index 796f60c36..f1b086566 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
@@ -18,6 +18,7 @@
 
 
 #include "../../config_lib.h"
+#include <FL/Fl.H>
 #include "Fl_WinAPI_Window_Driver.H"
 #include <windows.h>
 
@@ -247,6 +248,14 @@ void Fl_WinAPI_Window_Driver::icons(HICON big_icon, HICON small_icon)
     Fl_X::i(pWindow)->set_icons();
 }
 
+void Fl_WinAPI_Window_Driver::wait_for_expose() {
+  if (!pWindow->shown()) return;
+  Fl_X *i = Fl_X::i(pWindow);
+  while (!i || i->wait_for_expose) {
+    Fl::wait();
+  }
+}
+
 //
 // End of "$Id$".
 //
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.H b/src/drivers/X11/Fl_X11_Window_Driver.H
index 1eb161e0b..2d42b4410 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.H
+++ b/src/drivers/X11/Fl_X11_Window_Driver.H
@@ -74,6 +74,7 @@ public:
   virtual void icon(const void * ic);
   virtual void free_icons();
   virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
+  virtual void wait_for_expose();
 };
 
 
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.cxx b/src/drivers/X11/Fl_X11_Window_Driver.cxx
index 32ac787a2..05c27a972 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.cxx
+++ b/src/drivers/X11/Fl_X11_Window_Driver.cxx
@@ -331,6 +331,14 @@ void Fl_X11_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top, F
   previous->Fl_Surface_Device::set_current();
 }
 
+void Fl_X11_Window_Driver::wait_for_expose() {
+  if (!pWindow->shown()) return;
+  Fl_X *i = Fl_X::i(pWindow);
+  while (!i || i->wait_for_expose) {
+    Fl::wait();
+  }
+}
+
 //
 // End of "$Id$".
 //