001/* ListView.java -- 002 Copyright (C) 2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package javax.swing.text.html; 039 040import java.awt.Graphics; 041import java.awt.Rectangle; 042import java.awt.Shape; 043 044import 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 */ 052public 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}