Make NSToolbar wrapper compile on XE7

[GoogleCodeExporter]

Hi Chris,

Make CCR.CocoaToolbar.pas compile on XE7 with the following change:

function NSWindowOfForm(Form: TCommonCustomForm): NSWindow;
{$if CompilerVersion > 26.0}
var
  Obj: TOCLocal;
{$ifend}
begin
  {$if CompilerVersion > 26.0}
  Result:= TMacWindowHandle(Form.Handle).Wnd;
  {$else}
  Obj := (FmxHandleToObjC(Form.Handle) as TOCLocal);
  Result := NSWindow(TOCLocalAccess(Obj).Super);
  {$ifend}
end;

I don't know when TMacWindowHandle was introduced so $CompilerVersion may be 
wrong. But after this change the demo works fine on XE7.

In the demo the Enabled property of toolbar item has to be initialized, 
otherwise there are sometimes disabled. So in Main.pas add handler for all 
items:

  Item := FHelper.AddItem('FileOpen');
  Item.OnUpdate :=
    procedure (Sender: TNSToolbarHelperItem; var EnableItem: Boolean)
    begin
      EnableItem:= True; // add this
    end;

Best regards
Dirk Carstensen

Original issue reported on code.google.com by dirk.car...@gmail.com on 16 Jan 2015 at 1:25