public FlowQuad(String title) {
super(title);
JPanel contentPanel = new JPanel(new BorderLayout());
VectorField field = new VectorField();
// The interaction control panel is a separate window
contentPanel.add(field, BorderLayout.CENTER);
GUIPanel control = new GUIPanel(field);
control.setLocation(700, 0);
control.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.add(contentPanel);
// The initial window size is good for a square vector field with sides
// that are a power of 2, plus some extra in x and y (8 and 30) that
// appear to be about right for window pieces outside the draw area.
this.setSize(new Dimension(768 + 8, 768 + 30));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// make both windows visible
this.setVisible(true);
control.setVisible(true);
}
