private void renderTables()
{
this.renderKnapsackTable();
this.renderItems();
this.itemsStartY += 45;
this.renderWeights();
Button startBtn = ControlsHelper.CreateButton(new Size(100, 50), new Point(550, 20), "startVizualization", "Start visualization", new EventHandler(startVizualization_Click));
RichTextBox tooltip = ControlsHelper.CreateRichTextbox(new Size(400, 150), new Point(this.itemsStartX * this.yBagDimension + 50 + this.itemsMargin * 3, 100), "tooltip", isReadOnly: true);
this.tooltip = tooltip;
tooltip.BackColor = Color.White;
this.Controls.AddRange(new Control[] { startBtn, tooltip });
}