refactoring: application mode code split

editoruilayer.h

@@ -0,0 +1,39 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include "uilayer.h"
+
+namespace scene {
+
+class basic_node;
+
+}
+
+class editor_ui : public ui_layer {
+
+public:
+// constructors
+    editor_ui();
+// methods
+    // potentially processes provided input key. returns: true if the input was processed, false otherwise
+    bool
+        on_key( int const Key, int const Action ) override;
+    // updates state of UI elements
+    void
+        update() override;
+    void
+        set_node( scene::basic_node * Node );
+
+private:
+// members
+    ui_panel UIHeader { 20, 20 }; // header ui panel
+    scene::basic_node * m_node { nullptr }; // currently bound scene node, if any
+};