diff -r 0f0344e1ba61 -r ff4a1c07a481 src/RelpipeChartMainWindow.cpp
--- a/src/RelpipeChartMainWindow.cpp	Mon Oct 08 14:08:21 2018 +0200
+++ b/src/RelpipeChartMainWindow.cpp	Tue Oct 09 23:02:11 2018 +0200
@@ -1,10 +1,8 @@
-#include <QTabWidget>
+#include <vector>
+
 #include <QPushButton>
-#include <QLabel>
-#include <QStatusBar>
 #include <QSplitter>
-#include <QScrollArea>
-#include <QTableWidget>
+#include <QTableView>
 
 #include <QChart>
 #include <QChartView>
@@ -16,6 +14,7 @@
 
 using namespace relpipe::reader;
 using namespace relpipe::reader::handlers;
+
 QT_CHARTS_USE_NAMESPACE
 
 RelpipeChartMainWindow::RelpipeChartMainWindow() {
@@ -32,32 +31,23 @@
 
 void RelpipeChartMainWindow::startRelation(const string_t name, std::vector<AttributeMetadata> attributes) {
 	setStatusMessage(L"Reading relation: " + name);
-	attributeCounter = 0;
 	QSplitter* splitter = new QSplitter(Qt::Orientation::Vertical, tabs);
 
-	currentTable = new QTableWidget(0, attributes.size(), splitter);
-	QStringList headers;
-	for (AttributeMetadata a : attributes) headers << QString::fromWCharArray(a.getAttributeName().c_str());
-	// for (AttributeMetadata a : attributes) headers << (QString::fromWCharArray(a.getAttributeName().c_str()) + " (" + QString::fromWCharArray(a.getTypeName().c_str()) + ")" );
-	currentTable->setHorizontalHeaderLabels(headers);
-	currentTable->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeMode::ResizeToContents);
-
+	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));
-	splitter->addWidget(currentTable);
+	splitter->addWidget(tableView);
 	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"));
 }
 
 void RelpipeChartMainWindow::attribute(const string_t value) {
-	// TODO: draw chart
-	integer_t column = attributeCounter % currentTable->columnCount();
-	integer_t row = attributeCounter / currentTable->columnCount();
-	if (row >= currentTable->rowCount()) currentTable->insertRow(currentTable->rowCount());
-	QString name = QString::fromWCharArray(value.c_str());
-	currentTable->setItem(row, column, new QTableWidgetItem(name));
-	attributeCounter++;
+	currentModel->addAttribute(value);
 }
 
 void RelpipeChartMainWindow::setStatusMessage(string_t message) {