From c029bba113a2a28d858ac6d25607ccb870a6928a Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Fri, 30 Sep 2011 08:03:22 +0000
Subject: Fix STR#2600 for the MSWindow and Mac OS platforms.

A new event FL_SCREEN_CONFIGURATION_CHANGED is introduced.
Fl::add_handler() allows to register a callback for this event.
The unix/X11 implementation is still missing.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9087 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl.cxx       | 3 ++-
 src/Fl_cocoa.mm  | 1 +
 src/Fl_win32.cxx | 3 +++
 3 files changed, 6 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/Fl.cxx b/src/Fl.cxx
index 597fa2942..6264c4a30 100644
--- a/src/Fl.cxx
+++ b/src/Fl.cxx
@@ -776,8 +776,9 @@ static handler_link *handlers = 0;
   them returns non-zero then the event is ignored.  Events that cause
   this to be called are:
 
-  - FL_SHORTCUT events that are not recognized by any widget.
+  - \ref FL_SHORTCUT events that are not recognized by any widget.
     This lets you provide global shortcut keys.
+  - \ref FL_SCREEN_CONFIGURATION_CHANGED events (not implemented on the X11 platform).
   - System events that FLTK does not recognize.  See fl_xevent.
   - \e Some other events when the widget FLTK selected returns
     zero from its handle() method.  Exactly which ones may change
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 801c848c2..67cae882c 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -1099,6 +1099,7 @@ void fl_open_callback(void (*cb)(const char *)) {
       [[NSNotificationCenter defaultCenter] postNotificationName:NSWindowDidMoveNotification object:win];
       }
     }
+  Fl::handle(FL_SCREEN_CONFIGURATION_CHANGED, NULL);
 }
 - (void)applicationWillResignActive:(NSNotification *)notify
 {
diff --git a/src/Fl_win32.cxx b/src/Fl_win32.cxx
index 1774c416b..9adbfc9dd 100644
--- a/src/Fl_win32.cxx
+++ b/src/Fl_win32.cxx
@@ -1203,6 +1203,9 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPar
     // unclear on what is correct:
     if (fl_msg.message == WM_RENDERALLFORMATS) CloseClipboard();
     return 1;}
+  case WM_DISPLAYCHANGE: // occurs when screen configuration (number, position) changes
+    Fl::handle(FL_SCREEN_CONFIGURATION_CHANGED, NULL);
+    return 0;
 
   default:
     if (Fl::handle(0,0)) return 0;
-- 
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