split imageselector

* image updating in seperate class ImageSwitcher
 * image selection in class ImageSelector

src/imageswitcher.h

@@ -0,0 +1,26 @@
+#ifndef IMAGESWITCHER_H
+#define IMAGESWITCHER_H
+
+#include <QObject>
+#include <QTimer>
+#include <iostream>
+
+class MainWindow;
+class ImageSelector;
+class ImageSwitcher : public QObject
+{
+    Q_OBJECT
+public:
+    ImageSwitcher(MainWindow& w, unsigned int timeout, const ImageSelector& selector);
+    void start();
+
+public slots:
+    void updateImage();
+private:
+    MainWindow& window;
+    unsigned int timeout;
+    const ImageSelector& selector;
+    QTimer timer;
+};
+
+#endif // IMAGESWITCHER_H