/* ================================================================

 * Cewolf : Chart enabling Web Objects Framework

 * ================================================================

 *

 * Project Info:  http://cewolf.sourceforge.net

 * Project Lead:  Guido Laures (guido@laures.de);

 *

 * (C) Copyright 2002, by Guido Laures

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * 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., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 */

package de.laures.cewolf.taglib.tags;

import java.awt.Paint;

import java.util.Map;

import javax.servlet.jsp.JspException;

import javax.servlet.jsp.PageContext;

import de.laures.cewolf.ChartPostProcessor;

import de.laures.cewolf.taglib.AbstractChartDefinition;

import de.laures.cewolf.taglib.TaglibConstants;

/**

 * Root tag <chart> of a chart definition. Defines all values for the

 * page scope variable of type ChartDefinition which is used by the img

 * tag to render the appropriate chart.

 * @author  Guido Laures

 */

public abstract class AbstractChartTag extends CewolfTag implements CewolfRootTag, TaglibConstants, Painted {

    protected AbstractChartDefinition chartDefinition = createChartDefinition();

    protected abstract AbstractChartDefinition createChartDefinition();

    public int doStartTag(){

        return EVAL_BODY_INCLUDE;

    }

    public int doEndTag() throws JspException {

        pageContext.setAttribute(getId(), chartDefinition, PageContext.PAGE_SCOPE);

        return doAfterEndTag(EVAL_PAGE);

    }

    public void reset() {

    	chartDefinition = createChartDefinition();

    }

    public String getChartId() {

        return getId();

    }

    /**

     * Setter for property title.

     * @param title New value of property title.

     */

    public void setTitle(String title) {

        chartDefinition.setTitle(title);

    }

    /**

     * Setter for property xAxisLabel.

     * @param xAxisLabel New value of property xAxisLabel.

     */

    public void setXaxislabel(String xAxisLabel) {

        chartDefinition.setXAxisLabel(xAxisLabel);

    }

    /**

     * Setter for property xAxisLabel.

     * @param xAxisLabel New value of property xAxisLabel.

     */

    public void setYaxislabel(String yAxisLabel) {

        chartDefinition.setYAxisLabel(yAxisLabel);

    }

    public void setBackground(String src) {

        String srcFile = pageContext.getServletContext().getRealPath(src);

        chartDefinition.setBackground(srcFile);

    }

    public void setBackgroundimagealpha(Float alpha) {

        chartDefinition.setBackgroundImageAlpha(alpha.floatValue());

    }

    public void setAntialias(boolean anti) {

        chartDefinition.setAntialias(anti);

    }

    /**

     * Setter for property legend.

     * @param legend New value of property legend.

     */

    public void setShowlegend(boolean legend) {

        chartDefinition.setShowLegend(legend);

    }

    /**

     * Setter for property legend.

     * @param legend New value of property legend.

     */

    public void setLegendanchor(String anchor) {

        if ("north".equalsIgnoreCase(anchor)) {

            chartDefinition.setLegendAnchor(ANCHOR_NORTH);

        } else if ("south".equalsIgnoreCase(anchor)) {

            chartDefinition.setLegendAnchor(ANCHOR_SOUTH);

        } else if ("west".equalsIgnoreCase(anchor)) {

            chartDefinition.setLegendAnchor(ANCHOR_WEST);

        } else if ("east".equalsIgnoreCase(anchor)) {

            chartDefinition.setLegendAnchor(ANCHOR_EAST);

        }

    }

    public void addChartPostProcessor(ChartPostProcessor pp, Map params) {

        chartDefinition.addPostProcessor(pp);

        chartDefinition.addPostProcessorParams(params);

    }

    public void setPaint(Paint paint){

        chartDefinition.setPaint(paint);

    }

    /**

         * Setter for property type.

         * @param type New value of property type.

         */

    public void setType(String type) {

        chartDefinition.setType(type);

    }

}