JasperReports use jFreeChart as a charting library. However many features in jFreeChart are not yet supported in JasperReports. With the help of customizer, you can fully control jFreeChart.
I took me quite a while to learn how to customize the jFreeChart in JasperReports.For example, we cannot change the size of bars in BarChart, or we cannot add a complicated dynamic subtitle.
Like scriptlets, Customizer is automatically invoked during the filling process.
Your own customizer class must implement net.sf.jasperreports.engine.JRChartCustomizer interface. This interface has only one method customize(org.jfree.chart.JFreeChart chart, JRChart jasperChart).
Here is one example:
ConsumptionChartCustomizer.java
package com.db.report.jasper.custom.consumptionreport.style;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.sql.Connection;
import java.sql.SQLException;
import net.sf.jasperreports.engine.JRAbstractChartCustomizer;
import net.sf.jasperreports.engine.JRChart;
import org.apache.log4j.Logger;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.block.BlockBorder;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.StackedBarRenderer;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.title.Title;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.HorizontalAlignment;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import com.db.misportal.util.ConnectionPool;
import com.db.report.jasper.custom.consumptionreport.dataset.ODBCDataset;
public class ConsumptionChartCustomizer extends JRAbstractChartCustomizer {
/** Default Constanst */
protected static final java.awt.Font HEADER_FONT = new java.awt.Font(
"Arial", Font.BOLD + Font.ITALIC, 14);
protected static final Color HEADER_COLOR = new Color(0x00, 0x00, 0xDE);
protected static final float BAR_WIDTH = 0.03f;
protected static final java.awt.Font TITLE_FONT = new java.awt.Font(
"Arial", Font.BOLD, 8);
protected static final Color TITLE_COLOR = new Color(0x00, 0x00, 128);
protected static final java.awt.Font TICKET_FONT = new java.awt.Font(
"Arial", Font.PLAIN, 8);
protected static final java.awt.Font LEGEND_FONT = new java.awt.Font(
"Arial", Font.PLAIN, 8);
protected static final java.awt.Color GRID_COLOR = new java.awt.Color(0, 0,
0);
private final static String[] DEFAULT_MONTH_ABBREVIATION = { "J", "F", "M",
"A", " M", " J", " J ", " A", " S", "O", "N", "D" };
protected static final String DEFAULT_TITLE = "Default Title";
protected static final String DEFAULT_SUB_TITLE = null;
protected static final String DEFAULT_DOMAIN_AXIS_LABEL = null;
protected static final String DEFAULT_RANGE_AXIS_LABEL = null;
protected static final RectangleEdge DEFAULT_LEGEND_POSITION = RectangleEdge.TOP;
protected JFreeChart chart;
private Title subTitle = null;
private boolean hasSubTitle = false;
private boolean hasLegend = false;
protected static final RectangleEdge DEFAULT_SUBTITLE_POSITION = RectangleEdge.BOTTOM;
protected static final HorizontalAlignment DEFAULT_SUBTITLE_HORIZONTAL_ALIGNMENT = HorizontalAlignment.LEFT;
public void customize(JFreeChart chart, JRChart jrChart) {
_log.info("customize jFreeChart ...");
this.chart = chart;
/* Set Chart Title */
try {
TextTitle title = chart.getTitle();
title.setHorizontalAlignment(HorizontalAlignment.LEFT);
} catch (NullPointerException e) {
}
/* Chart Properties */
chart.setBackgroundPaint(Color.white);
chart.setBorderPaint(new Color(192, 192, 192));
chart.setBorderVisible(true);
chart.setBorderStroke(new BasicStroke(0.001f));
chart.setPadding(new RectangleInsets(1, 1, 1, 1)); // top,left,bottom,right
/* Legend Properties */
hasLegend = true;
try {
LegendTitle legend = chart.getLegend();
legend.setItemFont(LEGEND_FONT);
legend.setBorder(BlockBorder.NONE);
legend.setPosition(DEFAULT_LEGEND_POSITION);
} catch (NullPointerException e) {
hasLegend = false;
}
/* Chart subtitle */
try {
int subTitleIndex = 0;
if (hasLegend) {
subTitleIndex = 1;
} else {
subTitleIndex = 0;
}
hasSubTitle = true;
subTitle = chart.getSubtitle(subTitleIndex);
setSubTitlePosition(DEFAULT_SUBTITLE_POSITION);
setSubTitleHorizontalAlignment(DEFAULT_SUBTITLE_HORIZONTAL_ALIGNMENT);
} catch (IllegalArgumentException e) {
hasSubTitle = false;
subTitle = null;
_log.debug("This chart has no subtitle.");
}
/* Axis: Ticket Label + Line */
try {
CategoryPlot plot = chart.getCategoryPlot();
NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();
numberAxis.setTickLabelFont(TICKET_FONT);
numberAxis.setTickLabelPaint(Color.black);
numberAxis.setAxisLinePaint(Color.black);
numberAxis.setAxisLineStroke(new BasicStroke(0.001f));
numberAxis.setTickMarkPaint(GRID_COLOR);
numberAxis.setTickMarkStroke(new BasicStroke(0.001f));
numberAxis.setTickMarkOutsideLength(3f);
CategoryAxis categoryAxis = (CategoryAxis) plot.getDomainAxis();
categoryAxis.setTickLabelFont(TICKET_FONT);
categoryAxis.setTickLabelPaint(Color.black);
categoryAxis.setAxisLinePaint(Color.black);
categoryAxis.setAxisLineStroke(new BasicStroke(0.001f));
categoryAxis.setAxisLineVisible(false);
categoryAxis.setTickMarkPaint(GRID_COLOR);
categoryAxis.setTickMarkStroke(new BasicStroke(0.001f));
categoryAxis.setTickMarkOutsideLength(3f);
categoryAxis.setTickMarkInsideLength(1f);
// plot.setBackgroundPaint(Color.gray);
/* Grid */
// plot.setRangeGridlinesVisible(false);
plot.setRangeGridlinePaint(GRID_COLOR);
plot.setRangeGridlineStroke(new BasicStroke(0.001f));
plot.clearRangeMarkers();
/* Outline */
plot.setOutlinePaint(null);
/* Unit */
numberAxis
.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
StackedBarRenderer renderer = (StackedBarRenderer) plot
.getRenderer();
renderer.setMaximumBarWidth(BAR_WIDTH);
renderer.setDrawBarOutline(true);
renderer.setOutlinePaint(Color.black);
renderer.setOutlineStroke(new BasicStroke(0.00001f));
/* Series Color - dont need it any more - we set color in iReport */
// renderer.setSeriesPaint(0, new Color(153, 153, 255));
// renderer.setSeriesPaint(1, new Color(153, 51, 102));
// renderer.setSeriesPaint(2, new Color(255, 255, 204));
// renderer.setSeriesPaint(3, new Color(204, 255, 255));
} catch (NullPointerException e) {
}
}
/**
* Set query with default month abbreviation
*
* @param query
*/
protected void setQuery(String query) {
this.setQuery(query, DEFAULT_MONTH_ABBREVIATION);
}
/**
* Set Chart Query : execute query and set plot dataset
*
* @param query
* @param month_abbreviation
*/
protected void setQuery(String query, String[] month_abbreviation) {
Connection conn = null;
DefaultCategoryDataset dataset = null;
try {
conn = ConnectionPool.getConnection();
dataset = new ODBCDataset(conn, query);
} catch (SQLException e) {
e.printStackTrace();
} catch (com.db.report.jasper.custom.common.dataset.NullDatasetException e) {
_log.debug("Empty dataset...Hide chart");
this.hide();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
CategoryPlot plot = chart.getCategoryPlot();
plot.setDataset(dataset);
}
/**
* Set chart title
*
* @param strTitle
*/
public void setTitle(String strTitle) {
TextTitle title = chart.getTitle();
if (title == null) {
chart.setTitle(strTitle);
} else {
title.setText(strTitle);
}
}
/**
* Set Legend Position
*
* @param position
*/
public void setLegendPosition(RectangleEdge position) {
try {
LegendTitle legend = chart.getLegend();
legend.setPosition(position);
} catch (NullPointerException e) {
}
}
/**
* Make chart invisible
*
*/
public void hide() {
CategoryPlot plot = chart.getCategoryPlot();
NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();
numberAxis.setVisible(false);
CategoryAxis categoryAxis = (CategoryAxis) plot.getDomainAxis();
categoryAxis.setVisible(false);
plot.setRangeGridlinesVisible(false);
}
/**
* Set Subtitle Position
*
* @param position
*/
public void setSubTitlePosition(RectangleEdge position) {
if (hasSubTitle && subTitle != null) {
subTitle.setPosition(position);
}
}
/**
* Set Subtitle text
*
* @param text
*/
public void setSubTitleText(String text) {
if (hasSubTitle && subTitle != null) {
((TextTitle) subTitle).setText(text);
}
}
/**
* Set Subtitle Horizontal Aligment (LEFT,RIGHT,CENTER)
*
* @param align
*/
public void setSubTitleHorizontalAlignment(HorizontalAlignment align) {
if (hasSubTitle && subTitle != null) {
subTitle.setHorizontalAlignment(align);
}
}
/** Logger */
static Logger _log = Logger.getLogger(ConsumptionChartCustomizer.class);
}
That's so far for today!
December 02, 2006
How to use ChartCustomizer
Tags:
JasperReports
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15 responses:
In the Ireport, how I set the Customizer class property?
Ya where do i save this class and set the customizer class property
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