work towards project explorer navigation bar

app/widget/projectexplorer/projectexplorernavigation.h

@@ -1,16 +1,54 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
 #ifndef PROJECTEXPLORERLISTVIEWTOOLBAR_H
 #define PROJECTEXPLORERLISTVIEWTOOLBAR_H
 
+#include <QLabel>
 #include <QPushButton>
+#include <QSlider>
 #include <QWidget>
 
 class ProjectExplorerNavigation : public QWidget
 {
+  Q_OBJECT
 public:
   ProjectExplorerNavigation(QWidget* parent);
 
+  void set_text(const QString& s);
+
+signals:
+  void DirectoryUpClicked();
+  void SizeChanged(int size);
+
+protected:
+  virtual void changeEvent(QEvent *) override;
+
 private:
+  void Retranslate();
+
   QPushButton* dir_up_btn_;
+
+  QLabel* dir_lbl_;
+
+  QSlider* size_slider_;
 };
 
 #endif // PROJECTEXPLORERLISTVIEWTOOLBAR_H