001 /* ListView.java --
002 Copyright (C) 2006 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.swing.text.html;
039
040 import java.awt.Graphics;
041 import java.awt.Rectangle;
042 import java.awt.Shape;
043
044 import javax.swing.text.Element;
045
046 /**
047 * A View to render HTML lists, like the <code><ul></code> and
048 * <code><ol></code> tags.
049 *
050 * @author Roman Kennke (kennke@aicas.com)
051 */
052 public class ListView
053 extends BlockView
054 {
055
056 /**
057 * The painter used to paint the list items.
058 */
059 private StyleSheet.ListPainter painter;
060
061 /**
062 * Creates a new <code>ListView</code> for the specified element.
063 *
064 * @param el the element to create a list view for
065 */
066 public ListView(Element el)
067 {
068 super(el, Y_AXIS);
069 }
070
071 /**
072 * Returns the alignment of this view along the specified axis.
073 *
074 * This returns <code>0.5</code> unconditionally.
075 *
076 * @param axis the axis
077 *
078 * @return the alignment of this view along the specified axis
079 */
080 public float getAlignment(int axis)
081 {
082 if (axis != X_AXIS && axis != Y_AXIS)
083 throw new IllegalArgumentException("Illegal axis parameter: " + axis);
084
085 return 0.5F;
086 }
087
088 /**
089 * Paints the <code>ListView</code>.
090 *
091 * @param g the graphics context to use for painting
092 * @param allocation the allocation given to this view
093 */
094 public void paint(Graphics g, Shape allocation)
095 {
096 super.paint(g, allocation);
097 }
098
099 /**
100 * Paints the child with the specified index into the specified allocation.
101 *
102 * This implementation forwards to the list painter fetched from the
103 * {@link StyleSheet} and then calls
104 * <code>super.paintChild(g, a, index)</code>.
105 *
106 * @param g the graphics context to use
107 * @param a the allocation for the child
108 * @param index the child index
109 */
110 protected void paintChild(Graphics g, Rectangle a, int index)
111 {
112 painter.paint(g, a.x, a.y, a.width, a.height, this, index);
113 super.paintChild(g, a, index);
114 }
115
116 /**
117 * Fetches this view's properties from the style attributes of this view's
118 * element.
119 *
120 * This forwards to super and then fetches a {@link StyleSheet.ListPainter}
121 * from the stylesheet suitable for painting the list.
122 */
123 protected void setPropertiesFromAttributes()
124 {
125 super.setPropertiesFromAttributes();
126 painter = getStyleSheet().getListPainter(getAttributes());
127 }
128 }