Add XRC handler for wxAuiToolBar.

Also add the demonstration of AUI handlers (this one and the existing one for
wxAuiNotebook) to the xrc sample.

See #15686.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75271 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/xrc/xrcdemo.cpp

@@ -41,6 +41,11 @@
     #include "wx/xrc/xh_ribbon.h"
 #endif // wxUSE_RIBBON
 
+#if wxUSE_AUI
+    #include "wx/xrc/xh_auinotbk.h"
+    #include "wx/xrc/xh_auitoolb.h"
+#endif // wxUSE_AUI
+
 #include "wx/cshelp.h"              // wxSimpleHelpProvider for helptext
 
 #include "myframe.h"
@@ -85,6 +90,11 @@ bool MyApp::OnInit()
     wxXmlResource::Get()->AddHandler(new wxRibbonXmlHandler);
 #endif
 
+#if wxUSE_AUI
+    wxXmlResource::Get()->AddHandler(new wxAuiNotebookXmlHandler);
+    wxXmlResource::Get()->AddHandler(new wxAuiToolBarXmlHandler);
+#endif
+
     // Load all of the XRC files that will be used. You can put everything
     // into one giant XRC file if you wanted, but then they become more
     // diffcult to manage, and harder to reuse in later projects.