Extract mouse handling events to it's own class

YACReader/mouse_handler.h

@@ -0,0 +1,23 @@
+#ifndef MOUSE_HANDLER_H
+#define MOUSE_HANDLER_H
+
+#include <QMouseEvent>
+
+class Viewer;
+
+namespace YACReader {
+class MouseHandler
+{
+public:
+    MouseHandler(Viewer *viewer);
+
+    void mousePressEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+
+private:
+    Viewer *viewer;
+};
+}
+
+#endif // MOUSE_HANDLER_H