diff -r 8c5364450a46 -r 04f1ac8a931b src/RelpipeChartMainWindow.cpp
--- a/src/RelpipeChartMainWindow.cpp	Tue Oct 30 23:52:55 2018 +0100
+++ b/src/RelpipeChartMainWindow.cpp	Sun Nov 18 00:38:49 2018 +0100
@@ -1,22 +1,13 @@
 #include <vector>
 
 #include <QPushButton>
-#include <QSplitter>
 #include <QTableView>
 
-#include <QChart>
-#include <QChartView>
-#include <QStackedBarSeries>
-#include <QBarCategoryAxis>
-#include <QVBarModelMapper>
-
 #include "RelpipeChartMainWindow.h"
 
 using namespace relpipe::reader;
 using namespace relpipe::reader::handlers;
 
-QT_CHARTS_USE_NAMESPACE
-
 RelpipeChartMainWindow::RelpipeChartMainWindow() {
 	widget.setupUi(this);
 
@@ -31,16 +22,18 @@
 
 void RelpipeChartMainWindow::startRelation(const string_t name, std::vector<AttributeMetadata> attributes) {
 	setStatusMessage(L"Reading relation: " + name);
-	QSplitter* splitter = new QSplitter(Qt::Orientation::Vertical, tabs);
 
 	currentModel = new RelpipeTableModel(attributes, this);
 	QTableView* tableView = new QTableView(this);
 	tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeMode::ResizeToContents);
 	tableView->setModel(currentModel);
-	
-	// TODO: chart
-	splitter->addWidget(new QPushButton("here will be the chart", splitter));
+
+	if (currentChartWidget) currentChartWidget->endOfRelation();
+	currentChartWidget = new RelpipeChartWidget(currentModel, splitter);
+	splitter->addWidget(currentChartWidget);
 	splitter->addWidget(tableView);
+	splitter->setSizes({currentChartWidget->hasChartData() ? 1 : 0, 1});
+	// splitter->setStretchFactor(currentChartWidget->hasChartData() ? 1 : 0, 1); // FIXME: 50:50 if chart is present
 	int index = tabs->addTab(splitter, QString::fromWCharArray(name.c_str()));
 	if (tabs->count() == 2) tabs->setCurrentIndex(index); // switch to the first relation (first tab is Options tab)
 	tabs->setTabIcon(index, QIcon::fromTheme("application-vnd.oasis.opendocument.spreadsheet"));
@@ -55,5 +48,6 @@
 }
 
 void RelpipeChartMainWindow::endOfPipe() {
+	if (currentChartWidget) currentChartWidget->endOfRelation();
 	setStatusMessage(L"Reading successfully finished.");
 }