libjava/classpath/javax/swing/text/html/ListView.java

/* ListView.java --
   Copyright (C) 2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
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package javax.swing.text.html;

import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Shape;

import javax.swing.text.Element;

/**
 * A View to render HTML lists, like the <code>&lt;ul&gt;</code> and
 * <code>&lt;ol&gt;</code> tags.
 *
 * @author Roman Kennke (kennke@aicas.com)
 */
public class ListView
  extends BlockView
{

  /**
   * The painter used to paint the list items.
   */
  private StyleSheet.ListPainter painter;

  /**
   * Creates a new <code>ListView</code> for the specified element.
   *
   * @param el the element to create a list view for
   */
  public ListView(Element el)
  {
    super(el, Y_AXIS);
  }

  /**
   * Returns the alignment of this view along the specified axis.
   *
   * This returns <code>0.5</code> unconditionally.
   *
   * @param axis the axis
   *
   * @return the alignment of this view along the specified axis
   */
  public float getAlignment(int axis)
  {
    if (axis != X_AXIS && axis != Y_AXIS)
      throw new IllegalArgumentException("Illegal axis parameter: " + axis);

    return 0.5F;
  }

  /**
   * Paints the <code>ListView</code>.
   *
   * @param g the graphics context to use for painting
   * @param allocation the allocation given to this view
   */
  public void paint(Graphics g, Shape allocation)
  {
    super.paint(g, allocation);
  }

  /**
   * Paints the child with the specified index into the specified allocation.
   *
   * This implementation forwards to the list painter fetched from the
   * {@link StyleSheet} and then calls
   * <code>super.paintChild(g, a, index)</code>.
   *
   * @param g the graphics context to use
   * @param a the allocation for the child
   * @param index the child index
   */
  protected void paintChild(Graphics g, Rectangle a, int index)
  {
    painter.paint(g, a.x, a.y, a.width, a.height, this, index);
    super.paintChild(g, a, index);
  }

  /**
   * Fetches this view's properties from the style attributes of this view's
   * element.
   *
   * This forwards to super and then fetches a {@link StyleSheet.ListPainter}
   * from the stylesheet suitable for painting the list.
   */
  protected void setPropertiesFromAttributes()
  {
    super.setPropertiesFromAttributes();
    painter = getStyleSheet().getListPainter(getAttributes());
  }
}