Widgets|libappfw: Added CallbackAction for calling a std::function

doomsday/sdk/libappfw/include/de/CallbackAction

@@ -0,0 +1 @@
+#include "framework/callbackaction.h"

doomsday/sdk/libappfw/include/de/framework/callbackaction.h

@@ -0,0 +1,45 @@
+/** @file callbackaction.h  Action with a std::function callback.
+ *
+ * @authors Copyright (c) 2016 Jaakko Keränen <jaakko.keranen@iki.fi>
+ *
+ * @par License
+ * LGPL: http://www.gnu.org/licenses/lgpl.html
+ *
+ * <small>This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version. This program is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * General Public License for more details. You should have received a copy of
+ * the GNU Lesser General Public License along with this program; if not, see:
+ * http://www.gnu.org/licenses</small>
+ */
+
+#ifndef LIBAPPFW_CALLBACKACTION_H
+#define LIBAPPFW_CALLBACKACTION_H
+
+#include <de/Action>
+#include <functional>
+
+namespace de {
+
+/**
+ * Action that calls a callback function when triggered.
+ */
+class CallbackAction : public Action
+{
+public:
+    typedef std::function<void ()> Callback;
+
+public:
+    CallbackAction(Callback callback);
+    void trigger() override;
+
+private:
+    Callback _func;
+};
+
+} // namespace de
+
+#endif // LIBAPPFW_CALLBACKACTION_H

doomsday/sdk/libappfw/src/callbackaction.cpp

@@ -0,0 +1,33 @@
+/** @file callbackaction.cpp  Action with a std::function callback.
+ *
+ * @authors Copyright (c) 2016 Jaakko Keränen <jaakko.keranen@iki.fi>
+ *
+ * @par License
+ * LGPL: http://www.gnu.org/licenses/lgpl.html
+ *
+ * <small>This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version. This program is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * General Public License for more details. You should have received a copy of
+ * the GNU Lesser General Public License along with this program; if not, see:
+ * http://www.gnu.org/licenses</small>
+ */
+
+#include "de/CallbackAction"
+
+namespace de {
+
+CallbackAction::CallbackAction(Callback callback)
+    : _func(callback)
+{}
+
+void CallbackAction::trigger()
+{
+    Action::trigger();
+    _func();
+}
+
+} // namespace de