diff -r 8c5364450a46 -r 04f1ac8a931b src/RelpipeChartMainWindow.h
--- a/src/RelpipeChartMainWindow.h	Tue Oct 30 23:52:55 2018 +0100
+++ b/src/RelpipeChartMainWindow.h	Sun Nov 18 00:38:49 2018 +0100
@@ -2,6 +2,7 @@
 
 #include <QTableWidget>
 #include <QLabel>
+#include <QSplitter>
 
 #include "ui_RelpipeChartMainWindow.h"
 
@@ -11,6 +12,7 @@
 #include <relpipe/reader/handlers/AttributeMetadata.h>
 
 #include "RelpipeTableModel.h"
+#include "RelpipeChartWidget.h"
 
 using namespace relpipe::reader;
 using namespace relpipe::reader::handlers;
@@ -28,6 +30,8 @@
 private:
 	Ui::RelpipeChartMainWindow widget;
 	QTabWidget* tabs = new QTabWidget(this);
+	QSplitter* splitter = new QSplitter(Qt::Orientation::Vertical, tabs);
 	RelpipeTableModel* currentModel;
+	RelpipeChartWidget* currentChartWidget;
 	QLabel* status = new QLabel();
 };