[Home] DMelt member access. Java source code: org.jfree.chart.renderer.category.IntervalBarRenderer
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2014, 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.]
*
* ------------------------
* IntervalBarRenderer.java
* ------------------------
* (C) Copyright 2002-2014, by Jeremy Bowman.
*
* Original Author: Jeremy Bowman;
* Contributor(s): David Gilbert (for Object Refinery Limited);
* Christian W. Zuckschwerdt;
* Peter Kolb (patch 2497611, 2791407);
*
* Changes
* -------
* 29-Apr-2002 : Version 1, contributed by Jeremy Bowman (DG);
* 11-May-2002 : Use CategoryPlot.getLabelsVisible() (JB);
* 29-May-2002 : Added constructors (DG);
* 26-Jun-2002 : Added axis to initialise method (DG);
* 20-Sep-2002 : Added basic support for chart entities (DG);
* 24-Oct-2002 : Amendments for changes in CategoryDataset interface and
* CategoryToolTipGenerator interface (DG);
* 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);
* 25-Mar-2003 : Implemented Serializable (DG);
* 30-Jul-2003 : Modified entity constructor (CZ);
* 19-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
* 08-Sep-2003 : Added checks for null values (DG);
* 07-Oct-2003 : Added renderer state (DG);
* 21-Oct-2003 : Bar width moved into renderer state (DG);
* 23-Dec-2003 : Removed the deprecated MultiIntervalCategoryDataset
* interface (DG);
* 05-Nov-2004 : Modified drawItem() signature (DG);
* 20-Apr-2005 : Renamed CategoryLabelGenerator
* --> CategoryItemLabelGenerator (DG);
* 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
* 24-Jun-2008 : Added new barPainter mechanism (DG);
* 07-Oct-2008 : Override equals() method to fix minor bug (DG);
* 14-Jan-2009 : Added support for seriesVisible flags (PK);
* 16-May-2009 : The findRangeBounds() method needs to include the dataset
* interval (DG);
* 19-May-2009 : Fixed FindBugs warnings, patch by Michal Wozniak (DG);
* 30-Oct-2011 : Fixed alignment when setMaximumBarWidth is applied (DG);
*/
package org.jfree.chart.renderer.category;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.labels.CategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.Range;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.ui.RectangleEdge;
/**
* A renderer that handles the drawing of bars for a bar plot where
* each bar has a high and low value. This renderer is for use with the
* {@link CategoryPlot} class. The example shown here is generated by the
* IntervalBarChartDemo1.java program included in the JFreeChart
* Demo Collection:
*
* 
*/
public class IntervalBarRenderer extends BarRenderer {
/** For serialization. */
private static final long serialVersionUID = -5068857361615528725L;
/**
* Constructs a new renderer.
*/
public IntervalBarRenderer() {
super();
}
/**
* Returns the range of values from the specified dataset. For this
* renderer, this is equivalent to calling
* findRangeBounds(dataset, true).
*
* @param dataset the dataset (null permitted).
*
* @return The range (or null if the dataset is
* null or empty).
*/
@Override
public Range findRangeBounds(CategoryDataset dataset) {
return findRangeBounds(dataset, true);
}
/**
* Draws the bar for a single (series, category) data item.
*
* @param g2 the graphics device.
* @param state the renderer state.
* @param dataArea the data area.
* @param plot the plot.
* @param domainAxis the domain axis.
* @param rangeAxis the range axis.
* @param dataset the dataset.
* @param row the row index (zero-based).
* @param column the column index (zero-based).
* @param pass the pass index.
*/
@Override
public void drawItem(Graphics2D g2, CategoryItemRendererState state,
Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis,
ValueAxis rangeAxis, CategoryDataset dataset, int row, int column,
int pass) {
if (dataset instanceof IntervalCategoryDataset) {
IntervalCategoryDataset d = (IntervalCategoryDataset) dataset;
drawInterval(g2, state, dataArea, plot, domainAxis, rangeAxis,
d, row, column);
}
else {
super.drawItem(g2, state, dataArea, plot, domainAxis, rangeAxis,
dataset, row, column, pass);
}
}
/**
* Draws a single interval.
*
* @param g2 the graphics device.
* @param state the renderer state.
* @param dataArea the data plot area.
* @param plot the plot.
* @param domainAxis the domain axis.
* @param rangeAxis the range axis.
* @param dataset the data.
* @param row the row index (zero-based).
* @param column the column index (zero-based).
*/
protected void drawInterval(Graphics2D g2,
CategoryItemRendererState state,
Rectangle2D dataArea,
CategoryPlot plot,
CategoryAxis domainAxis,
ValueAxis rangeAxis,
IntervalCategoryDataset dataset,
int row,
int column) {
int visibleRow = state.getVisibleSeriesIndex(row);
if (visibleRow < 0) {
return;
}
PlotOrientation orientation = plot.getOrientation();
double rectX = 0.0;
double rectY = 0.0;
RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
// Y0
Number value0 = dataset.getEndValue(row, column);
if (value0 == null) {
return;
}
double java2dValue0 = rangeAxis.valueToJava2D(value0.doubleValue(),
dataArea, rangeAxisLocation);
// Y1
Number value1 = dataset.getStartValue(row, column);
if (value1 == null) {
return;
}
double java2dValue1 = rangeAxis.valueToJava2D(
value1.doubleValue(), dataArea, rangeAxisLocation);
if (java2dValue1 < java2dValue0) {
double temp = java2dValue1;
java2dValue1 = java2dValue0;
java2dValue0 = temp;
}
// BAR WIDTH
double rectWidth = state.getBarWidth();
// BAR HEIGHT
double rectHeight = Math.abs(java2dValue1 - java2dValue0);
RectangleEdge barBase = RectangleEdge.LEFT;
if (orientation == PlotOrientation.HORIZONTAL) {
// BAR Y
rectX = java2dValue0;
rectY = calculateBarW0(getPlot(), orientation, dataArea,
domainAxis, state, visibleRow, column);
rectHeight = state.getBarWidth();
rectWidth = Math.abs(java2dValue1 - java2dValue0);
barBase = RectangleEdge.LEFT;
}
else if (orientation == PlotOrientation.VERTICAL) {
// BAR X
rectX = calculateBarW0(getPlot(), orientation, dataArea,
domainAxis, state, visibleRow, column);
rectY = java2dValue0;
barBase = RectangleEdge.BOTTOM;
}
Rectangle2D bar = new Rectangle2D.Double(rectX, rectY, rectWidth,
rectHeight);
BarPainter painter = getBarPainter();
if (getShadowsVisible()) {
painter.paintBarShadow(g2, this, row, column, bar, barBase, false);
}
getBarPainter().paintBar(g2, this, row, column, bar, barBase);
CategoryItemLabelGenerator generator = getItemLabelGenerator(row,
column);
if (generator != null && isItemLabelVisible(row, column)) {
drawItemLabel(g2, dataset, row, column, plot, generator, bar,
false);
}
// add an item entity, if this information is being collected
EntityCollection entities = state.getEntityCollection();
if (entities != null) {
addItemEntity(entities, dataset, row, column, bar);
}
}
/**
* Tests this renderer for equality with an arbitrary object.
*
* @param obj the object (null permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof IntervalBarRenderer)) {
return false;
}
// there are no fields to check
return super.equals(obj);
}
}
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