diff -r a45d1cac365e -r c84042d014c9 src/RelpipeChartMainWindow.cpp
--- a/src/RelpipeChartMainWindow.cpp	Fri Sep 28 13:23:21 2018 +0200
+++ b/src/RelpipeChartMainWindow.cpp	Sat Sep 29 00:43:16 2018 +0200
@@ -6,20 +6,25 @@
 
 #include "RelpipeChartMainWindow.h"
 
+using namespace relpipe::reader;
+using namespace relpipe::reader::handlers;
+
 RelpipeChartMainWindow::RelpipeChartMainWindow() {
 	widget.setupUi(this);
 
-	QTabWidget* tabs = new QTabWidget(this);
+	tabs->addTab(new QPushButton("here will be options", tabs), "Options");
+
+	statusBar()->addWidget(new QLabel("Loading relations...", widget.statusbar));
+
 
-	for (int i = 0; i < 5; i++) {
-		QSplitter* splitter = new QSplitter(Qt::Orientation::Vertical, tabs);
-		splitter->addWidget(new QPushButton("here will be the chart", splitter));
-		splitter->addWidget(new QPushButton("here will be the table", splitter));
-		tabs->addTab(splitter, "relation_name");
-	}
-
-	//statusBar()->addWidget(new QPushButton("xxx", widget.statusbar));
-	statusBar()->addWidget(new QLabel("Loading relations...", widget.statusbar));
+	// TODO: remove; just demo
+	QPushButton* emitButton = new QPushButton("emit", widget.statusbar);
+	statusBar()->addWidget(emitButton);
+	QObject::connect(
+			emitButton, &QPushButton::pressed,
+			this, &RelpipeChartMainWindow::slot123
+			);
+	// ---
 
 	setCentralWidget(tabs);
 
@@ -27,3 +32,25 @@
 
 RelpipeChartMainWindow::~RelpipeChartMainWindow() {
 }
+
+void RelpipeChartMainWindow::slot123() {
+	// TODO: remove; just demo
+	statusBar()->addWidget(new QPushButton("slot123", widget.statusbar));
+}
+
+void RelpipeChartMainWindow::startRelation(string_t name, std::vector<AttributeMetadata> attributes) {
+	// TODO: chart and table
+	QSplitter* splitter = new QSplitter(Qt::Orientation::Vertical, tabs);
+	splitter->addWidget(new QPushButton("here will be the chart", splitter));
+	splitter->addWidget(new QPushButton("here will be the table", splitter));
+	tabs->addTab(splitter, QString::fromWCharArray(name.c_str()));
+}
+
+void RelpipeChartMainWindow::attribute(const string_t& value) {
+	// TODO: fill table and draw chart
+}
+
+void RelpipeChartMainWindow::endOfPipe() {
+	// TODO: just display a message
+	statusBar()->addWidget(new QPushButton("endOfPipe", widget.statusbar));
+}