Fix for component notifications when peer is changing. Some fixes for GCC4.7 on linux.

modules/juce_gui_basics/buttons/juce_Button.h

@@ -110,7 +110,7 @@ public:
     void setToggleState (bool shouldBeOn,
                          bool sendChangeNotification);
 
-    /** Returns true if the button in 'on'.
+    /** Returns true if the button is 'on'.
 
         By default buttons are 'off' and for simple buttons that you click to perform
         an action you won't change this. Toggle buttons, however will want to

modules/juce_gui_basics/components/juce_Component.cpp

@@ -568,12 +568,20 @@ void Component::addToDesktop (int styleWanted, void* nativeWindowToAttachTo)
 
         if (peer != nullptr)
         {
+            ScopedPointer<ComponentPeer> oldPeerToDelete (peer);
+
             wasFullscreen = peer->isFullScreen();
             wasMinimised = peer->isMinimised();
             currentConstainer = peer->getConstrainer();
             oldNonFullScreenBounds = peer->getNonFullScreenBounds();
 
-            removeFromDesktop();
+            flags.hasHeavyweightPeerFlag = false;
+            Desktop::getInstance().removeDesktopComponent (this);
+            internalHierarchyChanged(); // give comps a chance to react to the peer change before the old peer is deleted.
+
+            if (safePointer == nullptr)
+                return;
+
             setTopLeftPosition (topLeft);
         }
 

modules/juce_gui_basics/juce_gui_basics.cpp

@@ -97,6 +97,7 @@
  #include <X11/Xmd.h>
  #include <X11/keysym.h>
  #include <X11/cursorfont.h>
+ #include <unistd.h>
 
  #if JUCE_USE_XINERAMA
   /* If you're trying to use Xinerama, you'll need to install the "libxinerama-dev" package..  */