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jfreechart example source code file (CategoryItemRendererState.java)

This example jfreechart source code file (CategoryItemRendererState.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

categorycrosshairstate, categorycrosshairstate, categoryitemrendererstate, categoryitemrendererstate, rendererstate, rendererstate

The jfreechart CategoryItemRendererState.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------------------------
 * CategoryItemRendererState.java
 * ------------------------------
 * (C) Copyright 2003-2009, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Peter Kolb (patch 2497611);
 *
 * Changes (since 20-Oct-2003):
 * ----------------------------
 * 20-Oct-2003 : Added series running total (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 01-Dec-2006 : Updated API docs (DG);
 * 26-Jun-2008 : Added CrosshairState (DG);
 * 14-Jan-2009 : Added visibleSeries[] array (PK);
 * 04-Feb-2009 : Added getVisibleSeriesArray() method (DG);
 *
 */

package org.jfree.chart.renderer.category;

import org.jfree.chart.plot.CategoryCrosshairState;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.renderer.RendererState;

/**
 * An object that retains temporary state information for a
 * {@link CategoryItemRenderer}.
 */
public class CategoryItemRendererState extends RendererState {

    /** The bar width. */
    private double barWidth;

    /** The series running total. */
    private double seriesRunningTotal;

    /** The array with the indices of the visible series.*/
    private int[] visibleSeries;

    /**
     * State information for crosshairs in the plot (this is updated by the
     * renderer, but may be passed to several renderers in one chart).
     *
     * @since 1.0.11
     */
    private CategoryCrosshairState crosshairState;

    /**
     * Creates a new object for recording temporary state information for a
     * renderer.
     *
     * @param info  the plot rendering info (<code>null permitted).
     */
    public CategoryItemRendererState(PlotRenderingInfo info) {
        super(info);
        this.barWidth = 0.0;
        this.seriesRunningTotal = 0.0;
    }

    /**
     * Returns the bar width.
     *
     * @return The bar width.
     *
     * @see #setBarWidth(double)
     */
    public double getBarWidth() {
        return this.barWidth;
    }

    /**
     * Sets the bar width.  The renderer calculates this value and stores it
     * here - it is not intended that users can manually set the bar width.
     *
     * @param width  the width.
     *
     * @see #getBarWidth()
     */
    public void setBarWidth(double width) {
        this.barWidth = width;
    }

    /**
     * Returns the series running total.
     *
     * @return The running total.
     *
     * @see #setSeriesRunningTotal(double)
     */
    public double getSeriesRunningTotal() {
        return this.seriesRunningTotal;
    }

    /**
     * Sets the series running total (this method is intended for the use of
     * the renderer only).
     *
     * @param total  the new total.
     *
     * @see #getSeriesRunningTotal()
     */
    void setSeriesRunningTotal(double total) {
        this.seriesRunningTotal = total;
    }

    /**
     * Returns the crosshair state, if any.
     *
     * @return The crosshair state (possibly <code>null).
     *
     * @since 1.0.11
     *
     * @see #setCrosshairState(CategoryCrosshairState)
     */
    public CategoryCrosshairState getCrosshairState() {
        return this.crosshairState;
    }

    /**
     * Sets the crosshair state.
     *
     * @param state  the new state (<code>null permitted).
     *
     * @since 1.0.11
     *
     * @see #getCrosshairState()
     */
    public void setCrosshairState(CategoryCrosshairState state) {
        this.crosshairState = state;
    }

    /**
     * Returns the index of the row relative to the visible rows.  If no
     * visible rows have been specified, the original row index is returned.
     * If the row index is not included in the array of visible rows,
     * -1 is returned.
     *
     * @param rowIndex  the row index.
     *
     * @return The new row index or -1.
     *
     * @since 1.0.13
     */
    public int getVisibleSeriesIndex(int rowIndex) {
    	if (this.visibleSeries == null) {
    	    return rowIndex;
    	}
		int index = -1;
		for (int vRow = 0; vRow < this.visibleSeries.length ; vRow++){
			if (this.visibleSeries[vRow] == rowIndex) {
				index = vRow;
				break;
			}
		}
		return index;
    }

    /**
     * Returns the number of visible series or -1 if no visible series have
     * been specified.
     *
     * @return The number or -1.
     *
     * @since 1.0.13
     */
    public int getVisibleSeriesCount() {
    	if (this.visibleSeries == null) {
    	    return -1;
    	}
    	return this.visibleSeries.length;
    }

    /**
     * Returns a copy of the visible series array.
     * 
     * @return The visible series array (possibly <code>null).
     * 
     * @since 1.0.13
     */
    public int[] getVisibleSeriesArray() {
        if (this.visibleSeries == null) {
            return null;
        }
        int[] result = new int[this.visibleSeries.length];
        System.arraycopy(this.visibleSeries, 0, result, 0,
                this.visibleSeries.length);
        return result;
    }

    /**
     * Sets an array with the indices of the visible rows.
     *
     * @param visibleSeries the array (<code>null permitted).
     *
     * @since 1.0.13
     */
    public void setVisibleSeriesArray(int[] visibleSeries) {
        this.visibleSeries = visibleSeries;
    }

}

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