/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.trinidadinternal.image.laf.browser;
import java.awt.Color;
import java.awt.Font;
import java.awt.image.BufferedImage;
import java.util.Map;
import org.apache.myfaces.trinidadinternal.image.ImageConstants;
import org.apache.myfaces.trinidadinternal.image.ImageContext;
import org.apache.myfaces.trinidadinternal.image.PainterImageRenderer;
import org.apache.myfaces.trinidadinternal.image.painter.ImmInsets;
import org.apache.myfaces.trinidadinternal.image.painter.PaintContext;
import org.apache.myfaces.trinidadinternal.image.painter.PaintContextProxy;
import org.apache.myfaces.trinidadinternal.image.painter.Painter;
import org.apache.myfaces.trinidadinternal.style.util.FontProxy;
import org.apache.myfaces.trinidadinternal.style.util.GraphicsUtils;
/**
* ButtonImageRenderer is an ImageRenderer implementation which
* renders button images. The values of the following keys from
* the ImageConstants interface affect how the button is rendered:
* <ul>
* <li>TEXT_KEY
* <li>FOREGROUND_KEY
* <li>BACKGROUND_KEY
* <li>FONT_KEY
* <li>ANTIALIAS_KEY
* <li>DISABLED_KEY
* </ul>
*
* @version $Name: $ ($Revision: adfrt/faces/adf-faces-impl/src/main/java/oracle/adfinternal/view/faces/image/laf/browser/ButtonImageRenderer.java#0 $) $Date: 10-nov-2005.19:05:05 $
*/
public class ButtonImageRenderer extends PainterImageRenderer
{
// Creates a ButtonImageRenderer
public ButtonImageRenderer()
{
super(new ButtonPainter());
}
@Override
protected Painter getPainter(
ImageContext imageContext,
Map<Object, Object> requestedProperties
)
{
// We use a special ButtonPainter for Dialog which dynamically
// computes the margins based on the atual space used by the
// Dialog font glyphs.
if ("dialog".equalsIgnoreCase(_getFontName(requestedProperties)))
{
ImmInsets insets = BlafImageUtils.__getDialogPadding();
// We want to have a total top margin of 3 pixels from the
// top of the tallest glyph in the font and a bottom margin
// of 3 pixels beneath the base line.
// needs to be at least 3 from the bottom to see access
// keys underlined
int topMargin = 3 - insets.top;
int bottomMargin = 3 - insets.bottom;
if (_sDialogButtonPainter == null)
_sDialogButtonPainter = new ButtonPainter(topMargin, bottomMargin);
return _sDialogButtonPainter;
}
return super.getPainter(imageContext, requestedProperties);
}
@Override
protected boolean isRenderable(
ImageContext imageContext,
Map<Object, Object> requestedProperties
)
{
if (!super.isRenderable(imageContext, requestedProperties))
return false;
return GraphicsUtils.isFontName(_getFontName(requestedProperties));
}
@Override
protected PaintContext createPaintContext(
ImageContext imageContext,
BufferedImage image,
Map<Object, Object> requestedProperties,
Map<Object, Object> responseProperties
)
{
return new ProxyContext(super.createPaintContext(imageContext,
image,
requestedProperties,
responseProperties));
}
/**
* Returns the foreground color to use when painting an image
* with the specified dictionary.
*/
@Override
protected Color getPaintForeground(
ImageContext context,
Map<Object, Object> d)
{
Color foreground = super.getPaintForeground(context, d);
if (foreground != null)
return foreground;
return ButtonPainter.getDefaultForeground(context, _isDisabled(d));
}
/**
* Returns the background color to use when painting an image
* with the specified dictionary.
*/
@Override
protected Color getPaintBackground(
ImageContext context,
Map<Object, Object> d)
{
Color background = super.getPaintBackground(context, d);
if (background != null)
return background;
return ButtonPainter.getDefaultBackground(context, _isDisabled(d));
}
/**
* Returns the font color to use when painting an image
* with the specified dictionary.
*/
@Override
protected Font getPaintFont(Map<Object, Object> d)
{
Font font = super.getPaintFont(d);
if (font != null)
return font;
return ButtonPainter.getDefaultFont().getFont();
}
private String _getFontName(Map<Object, Object> requestedProperties)
{
// Make sure we've got a valid font
Object o = requestedProperties.get(FONT_KEY);
String name = null;
if (o instanceof FontProxy)
name = ((FontProxy)o).getName();
else if (o instanceof Font)
name = ((Font)o).getName();
return name;
}
private boolean _isDisabled(Map<Object, Object> properties)
{
Boolean disabled = (Boolean)properties.get(DISABLED_KEY);
if (disabled == null)
return false;
return disabled.booleanValue();
}
private static class ProxyContext extends PaintContextProxy
{
public ProxyContext(PaintContext context)
{
_context = context;
}
@Override
public Object getPaintData(Object key)
{
Object o = super.getPaintData(key);
if (o != null)
{
// Make sure we don't have an empty text value -
// this can result in an IllegalArgumentException
// when we try to create the BufferedImage, since
// the image height might be zero.
if (key.equals(TEXT_KEY) && "".equals(o))
o = " ";
return o;
}
if (key.equals(MNEMONIC_INDEX_KEY))
return _getMnemonicIndex();
return null;
}
@Override
protected PaintContext getPaintContext()
{
return _context;
}
private Integer _getMnemonicIndex()
{
Object o = super.getPaintData(ImageConstants.ACCESS_KEY_KEY);
if (!(o instanceof Character))
return null;
char c = ((Character)o).charValue();
String text = (String)super.getPaintData(ImageConstants.TEXT_KEY);
if (text == null)
return null;
int index = BlafImageUtils.__getMnemonicIndex(text, c);
if (index < 0)
return null;
return index;
}
private PaintContext _context;
}
// Special Painter for buttons rendered with the Dialog font
private static Painter _sDialogButtonPainter;
}