import java.awt.*; import java.awt.event.*; // class SplineTestPanel // // Author: Alexander Bogomolny, CTK Software, Inc. // URL: http://www.cut-the-knot.com // Date: November 30, 2000 // Copyright: A. Bogomolny // Permission to use and modify the file is therefore granted // as long as this comment remains unchanged. Do this at your // own risk. // public class SplineTestPanel extends Panel implements ItemListener { SplineTest m_Parent; Checkbox Derivative, Integral, Points, Shade; public SplineTestPanel(SplineTest parent) { super(); m_Parent = parent; add(Derivative = new Checkbox("Show Derivative", null, false)); Derivative.addItemListener(this); add(Integral = new Checkbox("Show Integral", null, false)); Integral.addItemListener(this); add(Points = new Checkbox("Show Points", null, false)); Points.addItemListener(this); add(Shade = new Checkbox("Shade graph", null, false)); Shade.addItemListener(this); try { setBackground(new Color(Integer.parseInt(m_Parent.getParameter("BCOLOR"), 16))); setForeground(new Color(Integer.parseInt(m_Parent.getParameter("FCOLOR"), 16))); } catch (Exception e) { setBackground(Color.lightGray); setForeground(Color.black); } } public void itemStateChanged(ItemEvent event) { String s = (String)event.getItem(); if (s.equals("Show Derivative")) { m_Parent.m_Canvas.ShowDerivative(Derivative.getState()); } else if (s.equals("Show Integral")) { m_Parent.m_Canvas.ShowIntegral(Integral.getState()); } else if (s.equals("Show Points")) { m_Parent.m_Canvas.ShowPoints(Points.getState()); } else if (s.equals("Shade graph")) { m_Parent.m_Canvas.ShowShade(Shade.getState()); } m_Parent.m_Canvas.repaint(); } }