From 0aff141c5114ae93c373a3ab350dcff69d05591c Mon Sep 17 00:00:00 2001
From: Stefan Csomor <csomor@advancedconcepts.ch>
Date: Mon, 6 Jun 2011 16:32:41 +0000
Subject: [PATCH] supporting nested window disablers on the same window

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67866 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/osx/cocoa/evtloop.h |  5 +++++
 src/osx/cocoa/evtloop.mm       | 29 ++++++++++++++++++++++++-----
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/include/wx/osx/cocoa/evtloop.h b/include/wx/osx/cocoa/evtloop.h
index c8b5d9e666..e38cf92c38 100644
--- a/include/wx/osx/cocoa/evtloop.h
+++ b/include/wx/osx/cocoa/evtloop.h
@@ -31,7 +31,12 @@ protected:
     virtual CFRunLoopRef CFGetCurrentRunLoop() const;
     
     void* m_modalSession;
+    
+    wxWindow* m_modalWindow;
+    
     WXWindow m_dummyWindow;
+    
+    int m_modalNestedLevel;
 };
 
 #endif // _WX_OSX_COCOA_EVTLOOP_H_
diff --git a/src/osx/cocoa/evtloop.mm b/src/osx/cocoa/evtloop.mm
index c9ac5ee75d..4814425583 100644
--- a/src/osx/cocoa/evtloop.mm
+++ b/src/osx/cocoa/evtloop.mm
@@ -107,12 +107,15 @@ wxGUIEventLoop::wxGUIEventLoop()
 {
     m_modalSession = nil;
     m_dummyWindow = nil;
+    m_modalNestedLevel = 0;
+    m_modalWindow = NULL;
 }
 
 wxGUIEventLoop::~wxGUIEventLoop()
 {
     wxASSERT( m_modalSession == nil );
     wxASSERT( m_dummyWindow == nil );
+    wxASSERT( m_modalNestedLevel == 0 );
 }
 
 //-----------------------------------------------------------------------------
@@ -308,6 +311,16 @@ void wxModalEventLoop::DoStop()
 void wxGUIEventLoop::BeginModalSession( wxWindow* modalWindow )
 {
     WXWindow nsnow = nil;
+
+    if ( m_modalNestedLevel > 0 )
+    {
+        wxASSERT_MSG( m_modalWindow == modalWindow, "Nested Modal Sessions must be based on same window");
+        m_modalNestedLevel++;
+        return;
+    }
+    
+    m_modalWindow = modalWindow;
+    m_modalNestedLevel = 1;
     
     if ( modalWindow )
     {
@@ -339,12 +352,18 @@ void wxGUIEventLoop::BeginModalSession( wxWindow* modalWindow )
 void wxGUIEventLoop::EndModalSession()
 {
     wxASSERT_MSG(m_modalSession != NULL, "no modal session active");
-    [NSApp endModalSession:(NSModalSession)m_modalSession];
-    m_modalSession = nil;
-    if ( m_dummyWindow )
+    
+    wxASSERT_MSG(m_modalNestedLevel > 0, "incorrect modal nesting level");
+    
+    if ( --m_modalNestedLevel == 0 )
     {
-        [m_dummyWindow release];
-        m_dummyWindow = nil;
+        [NSApp endModalSession:(NSModalSession)m_modalSession];
+        m_modalSession = nil;
+        if ( m_dummyWindow )
+        {
+            [m_dummyWindow release];
+            m_dummyWindow = nil;
+        }
     }
 }
 
-- 
2.45.2