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87 lines
3.0 KiB
Java
87 lines
3.0 KiB
Java
// Class: TextAndIconRenderer
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//
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// Author: Alyce Brady
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//
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// This class is based on the College Board's FishToolbar class,
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// as allowed by the GNU General Public License. FishToolbar is a
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// black-box GUI class within the AP(r) CS Marine Biology Simulation
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// case study (see
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// http://www.collegeboard.com/student/testing/ap/compsci_a/case.html).
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//
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// License Information:
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// This class is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation.
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//
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// This class is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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package edu.kzoo.grid.display;
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import java.awt.Component;
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import javax.swing.BorderFactory;
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import javax.swing.JComboBox;
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import javax.swing.JLabel;
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import javax.swing.JList;
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import javax.swing.ListCellRenderer;
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/**
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* Grid Display Package:<br>
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*
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* The <code>TextAndIconRenderer</code> class provides a
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* renderer that paints both the text and the icon of a
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* JLabel. (The default renderer only displays one or the
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* other.)
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*
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* @author Alyce Brady (based on code by Julie Zelenski)
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* @version 13 December 2003
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**/
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public class TextAndIconRenderer extends JLabel
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implements ListCellRenderer
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{
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private JComboBox cb;
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/** Constructs a renderer that will operate on the specified
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* combo box.
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* @param combo the combo box this renderer is associated with
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**/
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public TextAndIconRenderer(JComboBox combo)
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{
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setOpaque(true);
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setHorizontalAlignment(LEFT);
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setVerticalAlignment(CENTER);
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setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
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cb = combo;
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}
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/** Returns a component that can display the specified value.
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* (Precondition: <code>value</code> must be a <code>JLabel</code>.)
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* @param list the JList we're painting
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* @param value the value returned by list.getModel().getElementAt(index)
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* @param index the cell's index
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* @param isSelected <code>true</code> if the specified cell was selected
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* @param cellHasFocus <code>true</code if the specified cell has the focus
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* @return a component whose <code>paint</code> method will render
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* the specified value
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**/
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public Component getListCellRendererComponent(JList list,
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Object value, int index,
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boolean selected, boolean cellHasFocus)
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{
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setBackground(selected ? list.getSelectionBackground() : list.getBackground());
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setForeground(selected ? list.getSelectionForeground() : list.getForeground());
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if (!cb.isEnabled())
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{
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setText("No choice"); // draw differently when disabled
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setIcon(null);
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}
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else
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{
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setText(value.toString());
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setIcon(((JLabel)value).getIcon());
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}
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return this;
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}
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} |