6 files changed, 32 insertions, 0 deletions
diff --git a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
index 8cce010f6..a9bc4b68a 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
+++ b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
@@ -84,6 +84,7 @@ public:
   virtual void fullscreen_off(int X, int Y, int W, int H);
   virtual void size_range();
   virtual void iconize();
+  virtual void decoration_sizes(int *top, int *left,  int *right, int *bottom);
 
   virtual void shape(const Fl_Image* img);
   // that one is implemented in Fl_Cocoa.mm because it uses Objective-c
diff --git a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx
index 0354b1255..ec1d2cf73 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx
+++ b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx
@@ -258,6 +258,14 @@ void Fl_Cocoa_Window_Driver::fullscreen_off(int X, int Y, int W, int H) {
   Fl::handle(FL_FULLSCREEN, pWindow);
 }
 
+
+void Fl_Cocoa_Window_Driver::decoration_sizes(int *top, int *left,  int *right, int *bottom) {
+  *top = 24;
+  *left = 2;
+  *right = 2;
+  *bottom = 2;
+}
+
 //
 // End of "$Id$".
 //
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
index 2cae854ef..a6fa71ec4 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
@@ -88,6 +88,7 @@ public:
   virtual void fullscreen_on();
   virtual void fullscreen_off(int X, int Y, int W, int H);
   virtual void iconize();
+  virtual void decoration_sizes(int *top, int *left,  int *right, int *bottom);
 
   virtual void shape(const Fl_Image* img);
   virtual void icons(const Fl_RGB_Image *icons[], int count);
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
index dd3b64168..c2afc67f3 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
@@ -613,6 +613,18 @@ void Fl_WinAPI_Window_Driver::iconize() {
   ShowWindow(fl_xid(pWindow), SW_SHOWMINNOACTIVE);
 }
 
+
+void Fl_WinAPI_Window_Driver::decoration_sizes(int *top, int *left,  int *right, int *bottom) {
+  if (size_range_set() && (maxw() != minw() || maxh() != minh())) {
+    *left = *right = GetSystemMetrics(SM_CXSIZEFRAME);
+    *top = *bottom = GetSystemMetrics(SM_CYSIZEFRAME);
+  } else {
+    *left = *right = GetSystemMetrics(SM_CXFIXEDFRAME);
+    *top = *bottom = GetSystemMetrics(SM_CYFIXEDFRAME);
+  }
+  *top += GetSystemMetrics(SM_CYCAPTION);
+}
+
 //
 // End of "$Id$".
 //
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.H b/src/drivers/X11/Fl_X11_Window_Driver.H
index 35cee4afd..de2d65446 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.H
+++ b/src/drivers/X11/Fl_X11_Window_Driver.H
@@ -99,6 +99,7 @@ public:
   virtual void use_border();
   virtual void size_range();
   virtual void iconize();
+  virtual void decoration_sizes(int *top, int *left,  int *right, int *bottom);
 
   virtual void shape(const Fl_Image* img);
   virtual void icons(const Fl_RGB_Image *icons[], int count);
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.cxx b/src/drivers/X11/Fl_X11_Window_Driver.cxx
index 2d6782eaf..7ae170284 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.cxx
+++ b/src/drivers/X11/Fl_X11_Window_Driver.cxx
@@ -508,6 +508,15 @@ void Fl_X11_Window_Driver::iconize() {
   XIconifyWindow(fl_display, fl_xid(pWindow), fl_screen);
 }
 
+void Fl_X11_Window_Driver::decoration_sizes(int *top, int *left,  int *right, int *bottom) {
+  // Ensure border is on screen; these values are generic enough
+  // to work with many window managers, and are based on KDE defaults.
+  *top = 20;
+  *left = 4;
+  *right = 4;
+  *bottom = 8;
+}
+
 //
 // End of "$Id$".
 //