From b416a027cf131d87fb798e246d96745d12786f52 Mon Sep 17 00:00:00 2001
From: Matthias Melcher <fltk@matthiasm.com>
Date: Fri, 19 Feb 2010 20:21:20 +0000
Subject: [PATCH] Fixed window levels in OS X Cocoa (STR #2316)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7102 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 CHANGES         |  1 +
 src/Fl_cocoa.mm | 79 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)

diff --git a/CHANGES b/CHANGES
index cdaeba5ee..59dac48a9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,6 @@
 CHANGES IN FLTK 1.3.0
 
+	- Fixed window levels in OS X Cocoa (STR #2316)
 	- Added jpeg support to Fluid image() element
 	- Added loading jpeg images from memory
 	- Added binary data type to Fluid
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 1fc5f5ce2..6dd795067 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -1301,6 +1301,8 @@ extern "C" {
 - (void)windowDidMiniaturize:(NSNotification *)notif;
 - (void)windowWillClose:(NSNotification *)notif;
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication*)sender;
+- (void)applicationDidBecomeActive:(NSNotification *)notify;
+- (void)applicationWillResignActive:(NSNotification *)notify;
 
 @end
 @implementation FLDelegate
@@ -1389,6 +1391,83 @@ extern "C" {
   fl_unlock_function();
   return reply;
 }
+/**
+ * Cocoa organizes the Z depth of windows on a global priority. FLTK however
+ * expectes the window manager to organize Z level by application. The trickery
+ * below will change Z order during activation and deactivation.
+ */
+- (void)applicationDidBecomeActive:(NSNotification *)notify
+{
+  Fl_X *x;
+  FLWindow *top = 0, *topModal = 0, *topNonModal = 0;
+  for (x = Fl_X::first;x;x = x->next) {
+    FLWindow *cw = (FLWindow*)x->xid;
+    Fl_Window *win = x->w;
+    if (win && cw) {
+      if (win->modal()) {
+        [cw setLevel:NSModalPanelWindowLevel];
+        if (topModal) 
+          [cw orderWindow:NSWindowBelow relativeTo:[topModal windowNumber]];
+        else
+          topModal = cw;
+      } else if (win->non_modal()) {
+        [cw setLevel:NSFloatingWindowLevel];
+        if (topNonModal) 
+          [cw orderWindow:NSWindowBelow relativeTo:[topNonModal windowNumber]];
+        else
+          topNonModal = cw;
+      } else {
+        if (top) 
+          ;
+        else
+          top = cw;
+      }
+    }
+  }
+}
+- (void)applicationWillResignActive:(NSNotification *)notify
+{
+  Fl_X *x;
+  FLWindow *top = 0;
+  // sort in all regular windows
+  for (x = Fl_X::first;x;x = x->next) {
+    FLWindow *cw = (FLWindow*)x->xid;
+    Fl_Window *win = x->w;
+    if (win && cw) {
+      if (win->modal()) {
+      } else if (win->non_modal()) {
+      } else {
+        if (!top) top = cw;
+      }
+    }
+  }
+  // now sort in all modals
+  for (x = Fl_X::first;x;x = x->next) {
+    FLWindow *cw = (FLWindow*)x->xid;
+    Fl_Window *win = x->w;
+    if (win && cw) {
+      if (win->modal()) {
+        [cw setLevel:NSNormalWindowLevel];
+        if (top) [cw orderWindow:NSWindowAbove relativeTo:[top windowNumber]];
+      } else if (win->non_modal()) {
+      } else {
+      }
+    }
+  }
+  // finally all non-modals
+  for (x = Fl_X::first;x;x = x->next) {
+    FLWindow *cw = (FLWindow*)x->xid;
+    Fl_Window *win = x->w;
+    if (win && cw) {
+      if (win->modal()) {
+      } else if (win->non_modal()) {
+        [cw setLevel:NSNormalWindowLevel];
+        if (top) [cw orderWindow:NSWindowAbove relativeTo:[top windowNumber]];
+      } else {
+      }
+    }
+  }
+}
 @end
 
 @interface FLApplication : NSApplication