Upgrade WX to r74856, mainly to support @2x.

Externals/wxWidgets3/include/wx/gtk/notifmsg.h

@@ -0,0 +1,51 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/gtk/notifmsg.h
+// Purpose:     wxNotificationMessage for wxGTK.
+// Author:      Vadim Zeitlin
+// Created:     2012-07-25
+// Copyright:   (c) 2012 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_GTK_NOTIFMSG_H_
+#define _WX_GTK_NOTIFMSG_H_
+
+typedef struct _NotifyNotification NotifyNotification;
+
+// ----------------------------------------------------------------------------
+// wxNotificationMessage
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_ADV wxNotificationMessage : public wxNotificationMessageBase
+{
+public:
+    wxNotificationMessage() { Init(); }
+    wxNotificationMessage(const wxString& title,
+                          const wxString& message = wxString(),
+                          wxWindow *parent = NULL,
+                          int flags = wxICON_INFORMATION)
+        : wxNotificationMessageBase(title, message, parent, flags)
+    {
+        Init();
+    }
+
+    virtual ~wxNotificationMessage();
+
+
+    virtual bool Show(int timeout = Timeout_Auto);
+    virtual bool Close();
+
+    // Set the name of the icon to use, overriding the default icon determined
+    // by the flags. Call with empty string to reset custom icon.
+    bool GTKSetIconName(const wxString& name);
+
+private:
+    void Init() { m_notification = NULL; }
+
+    NotifyNotification* m_notification;
+    wxString m_iconName;
+
+    wxDECLARE_NO_COPY_CLASS(wxNotificationMessage);
+};
+
+#endif // _WX_GTK_NOTIFMSG_H_