How to insert a vertical panel in the form for laying out the components in a vertical layout fashion.
For example as Component 1 Component 2 Component 3.
Please give me an example code. I want to fit it in the following fashion! Display of the panels
HorizontalPanel mainPanel = new HorizontalPanel();
VerticalPanel leftSidePanel = new VerticalPanel();
TextBox textBox1 = new TextBox();
TextBox textBox2 = new TextBox();
leftSidePanel.addMember(textBox1);
leftSidePanel.addMember(textBox2);
VerticalPanel rightSidePanel = new VerticalPanel();
ListBox listBox = new ListBox();
listBox.addItem("value1","value1");
listBox.addItem("value2","value2");
rigthSidePanel.addMember(listBox);
mainPanel.addMember(leftSidePanel);
mainPanel.addMember(rightSidePanel);