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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------------
* XYItemRendererState.java
* ------------------------
* (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Ulrich Voigt;
* Greg Darke;
*
* Changes:
* --------
* 07-Oct-2003 : Version 1 (DG);
* 27-Jan-2004 : Added workingLine attribute (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 04-May-2007 : Added processVisibleItemsOnly flag (DG);
* 09-Jul-2008 : Added start/endSeriesPass() methods - see patch 1997549 by
* Ulrich Voigt (DG);
* 19-Sep-2008 : Added first and last item indices, based on patch by Greg
* Darke (DG);
*
*/
package org.jfree.chart.renderer.xy;
import java.awt.geom.Line2D;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.RendererState;
import org.jfree.data.xy.XYDataset;
/**
* The state for an {@link XYItemRenderer}.
*/
public class XYItemRendererState extends RendererState {
/**
* The first item in the series that will be displayed.
*
* @since 1.0.11
*/
private int firstItemIndex;
/**
* The last item in the current series that will be displayed.
*
* @since 1.0.11
*/
private int lastItemIndex;
/**
* A line object that the renderer can reuse to save instantiating a lot
* of objects.
*/
public Line2D workingLine;
/**
* A flag that controls whether the plot should pass ALL data items to the
* renderer, or just the items that will be visible.
*
* @since 1.0.6
*/
private boolean processVisibleItemsOnly;
/**
* Creates a new state.
*
* @param info the plot rendering info.
*/
public XYItemRendererState(PlotRenderingInfo info) {
super(info);
this.workingLine = new Line2D.Double();
this.processVisibleItemsOnly = true;
}
/**
* Returns the flag that controls whether the plot passes all data
* items in each series to the renderer, or just the visible items. The
* default value is true.
*
* @return A boolean.
*
* @since 1.0.6
*
* @see #setProcessVisibleItemsOnly(boolean)
*/
public boolean getProcessVisibleItemsOnly() {
return this.processVisibleItemsOnly;
}
/**
* Sets the flag that controls whether the plot passes all data
* items in each series to the renderer, or just the visible items.
*
* @param flag the new flag value.
*
* @since 1.0.6
*/
public void setProcessVisibleItemsOnly(boolean flag) {
this.processVisibleItemsOnly = flag;
}
/**
* Returns the first item index (this is updated with each call to
* {@link #startSeriesPass(XYDataset, int, int, int, int, int)}.
*
* @return The first item index.
*
* @since 1.0.11
*/
public int getFirstItemIndex() {
return this.firstItemIndex;
}
/**
* Returns the last item index (this is updated with each call to
* {@link #startSeriesPass(XYDataset, int, int, int, int, int)}.
*
* @return The last item index.
*
* @since 1.0.11
*/
public int getLastItemIndex() {
return this.lastItemIndex;
}
/**
* This method is called by the {@link XYPlot} when it starts a pass
* through the (visible) items in a series. The default implementation
* records the first and last item indices - override this method to
* implement additional specialised behaviour.
*
* @param dataset the dataset.
* @param series the series index.
* @param firstItem the index of the first item in the series.
* @param lastItem the index of the last item in the series.
* @param pass the pass index.
* @param passCount the number of passes.
*
* @see #endSeriesPass(XYDataset, int, int, int, int, int)
*
* @since 1.0.11
*/
public void startSeriesPass(XYDataset dataset, int series, int firstItem,
int lastItem, int pass, int passCount) {
this.firstItemIndex = firstItem;
this.lastItemIndex = lastItem;
}
/**
* This method is called by the {@link XYPlot} when it ends a pass
* through the (visible) items in a series. The default implementation
* does nothing, but you can override this method to implement specialised
* behaviour.
*
* @param dataset the dataset.
* @param series the series index.
* @param firstItem the index of the first item in the series.
* @param lastItem the index of the last item in the series.
* @param pass the pass index.
* @param passCount the number of passes.
*
* @see #startSeriesPass(XYDataset, int, int, int, int, int)
*
* @since 1.0.11
*/
public void endSeriesPass(XYDataset dataset, int series, int firstItem,
int lastItem, int pass, int passCount) {
// do nothing...this is just a hook for subclasses
}
}