Package org.richfaces.renderkit.html.images

Source Code of org.richfaces.renderkit.html.images.TriangleIconBase

/**
* License Agreement.
*
*  JBoss RichFaces - Ajax4jsf Component Library
*
* Copyright (C) 2007  Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

package org.richfaces.renderkit.html.images;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.util.Date;

import javax.faces.context.FacesContext;

import org.ajax4jsf.resource.GifRenderer;
import org.ajax4jsf.resource.InternetResourceBuilder;
import org.ajax4jsf.resource.Java2Dresource;
import org.ajax4jsf.resource.ResourceContext;
import org.ajax4jsf.util.HtmlColor;
import org.ajax4jsf.util.Zipper2;
import org.richfaces.skin.Skin;
import org.richfaces.skin.SkinFactory;

/**
* @author Siarhej Chalipau
*
*/
public abstract class TriangleIconBase extends Java2Dresource {
 
  private static final Dimension DIMENSION = new Dimension(15, 15);
 
  protected static final String ICON_COLOR = "generalTextColor";
  //protected static final String BACKGROUND_COLOR = "tabBackgroundColor";
  protected static final String BORDER_COLOR = "generalBackgroundColor";
 
  protected static final String DISABLED_ICON_COLOR = "tabDisabledTextColor";
  //protected static final String DISABLED_BACKGROUND_COLOR = "tabBackgroundColor";
  protected static final String DISABLED_BORDER_COLOR = "generalBackgroundColor";
 
  public TriangleIconBase() {
    setRenderer(new GifRenderer());
    setLastModified(new Date(InternetResourceBuilder.getInstance().getStartTime()));
  }
 
  abstract protected void paintImage(ResourceContext context, Graphics2D g2d, Color textColor, Color borderColor);
 
  protected void paintBaseTriangle(Graphics2D g2d) {
    for (int i = 0; i < 7; i++) {
      g2d.drawLine(-3 + i, 1, -3 + i, 1 + (i < 4 ? i : 6 - i));
    }
  }
 
  protected void paint(ResourceContext context, Graphics2D g2d) {
   
    Color [] data = (Color[]) restoreData(context);
    Color textColor = data[0];
    Color borderColor = data[1];
   
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
    g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE);
    g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_DISABLE);
    g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
//    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
//    g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_DISABLE);
//    g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);

    if (textColor != null && borderColor != null && g2d != null) {
      paintImage(context, g2d, textColor, borderColor);
    }
   
  }
 
  public Dimension getDimensions(FacesContext facesContext, Object data) {
    return DIMENSION;
  }
  protected Dimension getDimensions(ResourceContext resourceContext) {
    return DIMENSION;
  }
 
  /**
   * @param data - pass icon color and background color
   */
  protected Object getDataToStore(FacesContext context, Object data) {
    return getDataToStore(context, null, ICON_COLOR, null,
        BORDER_COLOR);
  }

  protected String getParameterValue(FacesContext context, Skin skin, Skin defaultSkin,
      String parameterName, String defaultParameterName) {
   
    String value = null;
   
    if (parameterName != null && parameterName.length() != 0) {
      value = (String) skin.getParameter(context, parameterName);
      if (value == null || value.length() == 0) {
        value = (String) defaultSkin.getParameter(context, parameterName);
      }
    }

    if (value == null || value.length() == 0) {
      if (defaultParameterName != null && defaultParameterName.length() != 0) {
        value = (String) skin.getParameter(context, defaultParameterName);
        if (value == null || value.length() == 0) {
          value = (String) defaultSkin.getParameter(context, defaultParameterName);
        }
      }
    }
   
    if (value == null) {
      return "#FFFFFF";
    }
   
    return value;
  }
 
  protected Object getDataToStore(FacesContext context,
      String iconColorParam,
      String defaultIconColorParam,
      String borderColorParam,
      String defaultBorderColorParam) {
    SkinFactory skinFactory = SkinFactory.getInstance();
    Skin skin = skinFactory.getSkin(context);
    Skin defaultSkin = skinFactory.getDefaultSkin(context);
   
    byte [] ret = new byte[6];
   
    Color color = null;
    Zipper2 zipper = new Zipper2(ret);
   
    String color1 = getParameterValue(context, skin, defaultSkin,
        iconColorParam,
        defaultIconColorParam);
   
    color = HtmlColor.decode(color1);
   
    zipper.addColor(color);
   
    String color2 = getParameterValue(context, skin, defaultSkin,
        borderColorParam,
        defaultBorderColorParam);
   
    color = HtmlColor.decode(color2);
    zipper.addColor(color);
   
    return ret;
  }
 
  protected Object deserializeData(byte[] objectArray) {
    if (objectArray == null) {
      return null;
    }
   
    Zipper2 zipper = new Zipper2(objectArray);
   
    return new Color[] {zipper.nextColor(), zipper.nextColor()};
  }
 
  public boolean isCacheable() {
    return true;
  }

}
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