diff --git a/snapshot.cpp b/snapshot.cpp
--- a/snapshot.cpp
+++ b/snapshot.cpp
@@ -15,6 +15,14 @@ SnapShot::SnapShot(QMainWindow* parent, 
     connect(&_menuAction, &QAction::triggered, this, &SnapShot::show);
 }
 
+SnapShot::~SnapShot()
+{
+    if (view != NULL)
+    {
+        delete view;
+    }
+}
+
 QAction* SnapShot::menuAction()
 {
     return &_menuAction;
@@ -26,6 +34,7 @@ void SnapShot::show()
     {
         qDebug() << "view == NULL";
         view = new SnapShotView(mainWindow, this);
+        connect(view, &SnapShotView::closed, this, &SnapShot::viewClosed);
     }
     view->show();
 }
@@ -34,3 +43,9 @@ void SnapShot::hide()
 {
 
 }
+
+void SnapShot::viewClosed()
+{
+    delete view;
+    view = NULL;
+}
diff --git a/snapshot.h b/snapshot.h
--- a/snapshot.h
+++ b/snapshot.h
@@ -14,6 +14,7 @@ class SnapShot : public QObject
 
 public:
     SnapShot(QMainWindow* parent, QString name);
+    ~SnapShot();
 
     // QString _name;
     QVector<QVector<QPointF>> data;
@@ -27,6 +28,9 @@ private:
     QAction _menuAction;
     QMainWindow* mainWindow;
     SnapShotView* view;
+
+private slots:
+    void viewClosed();
 };
 
 #endif /* SNAPSHOT_H */
diff --git a/snapshotview.cpp b/snapshotview.cpp
--- a/snapshotview.cpp
+++ b/snapshotview.cpp
@@ -29,3 +29,8 @@ SnapShotView::~SnapShotView()
     }
     delete ui;
 }
+
+void SnapShotView::closeEvent(QCloseEvent *event)
+{
+    emit closed();
+}
diff --git a/snapshotview.h b/snapshotview.h
--- a/snapshotview.h
+++ b/snapshotview.h
@@ -5,6 +5,7 @@
 #include <QVector>
 #include <QPointF>
 #include <QPen>
+#include <QCloseEvent>
 #include <qwt_plot_curve.h>
 #include "plot.h"
 #include "snapshot.h"
@@ -21,11 +22,15 @@ public:
     explicit SnapShotView(QWidget *parent, SnapShot* snapShot);
     ~SnapShotView();
 
+signals:
+    void closed();
+
 private:
     Ui::SnapShotView *ui;
     QList<QwtPlotCurve*> curves;
 
     SnapShot* _snapShot;
+    void closeEvent(QCloseEvent *event);
 };
 
 #endif // SNAPSHOTVIEW_H