diff --git a/plotwidget.cpp b/plotwidget.cpp
new file mode 100644
index 0000000..3189020
--- /dev/null
+++ b/plotwidget.cpp
@@ -0,0 +1,10 @@
+#include "plotwidget.h"
+
+PlotWidget::PlotWidget(QWidget *parent) : QWidget(parent)
+{
+
+}
+void PlotWidget::leaveEvent(QEvent *event)
+{
+    emit leftPlot();
+}
diff --git a/plotwidget.h b/plotwidget.h
new file mode 100644
index 0000000..4f11659
--- /dev/null
+++ b/plotwidget.h
@@ -0,0 +1,19 @@
+#ifndef PLOTWIDGET_H
+#define PLOTWIDGET_H
+
+#include <QWidget>
+
+class PlotWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit PlotWidget(QWidget *parent = nullptr);
+
+signals:
+    void leftPlot();
+protected:
+    void leaveEvent(QEvent *event);
+public slots:
+};
+
+#endif // PLOTWIDGET_H