First prototype

mainwindow.h

@@ -0,0 +1,21 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QLabel>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+    QLabel *_image;
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+public slots:
+    void openFile();
+    void saveFile();
+private:
+    void setupUI();
+};
+
+#endif // MAINWINDOW_H