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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jmeter.visualizers;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.LayoutManager;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import javax.swing.JPanel;
import org.jCharts.axisChart.AxisChart;
import org.jCharts.chartData.AxisChartDataSet;
import org.jCharts.chartData.DataSeries;
import org.jCharts.properties.AxisProperties;
import org.jCharts.properties.ChartProperties;
import org.jCharts.properties.DataAxisProperties;
import org.jCharts.properties.LegendProperties;
import org.jCharts.properties.LineChartProperties;
import org.jCharts.properties.PointChartProperties;
import org.jCharts.types.ChartType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* Axis graph is used by StatGraphVisualizer, which generates bar graphs
* from the statistical data.
*/
public class LineGraph extends JPanel {
private static final long serialVersionUID = 241L;
private static final Logger log = LoggerFactory.getLogger(LineGraph.class);
protected double[][] data = null;
protected String title;
protected String xAxisTitle;
protected String yAxisTitle;
protected String[] xAxisLabels;
protected String[] yAxisLabel;
protected int width;
protected int height;
private static final Shape[] SHAPE_ARRAY = {PointChartProperties.SHAPE_CIRCLE,
PointChartProperties.SHAPE_DIAMOND,PointChartProperties.SHAPE_SQUARE,
PointChartProperties.SHAPE_TRIANGLE};
/**
* 12 basic colors for line graphs. If we need more colors than this,
* we can add more. Though more than 12 lines per graph will look
* rather busy and be hard to read.
*/
private static final Paint[] PAINT_ARRAY = {Color.black,
Color.blue,Color.green,Color.magenta,Color.orange,
Color.red,Color.yellow,Color.darkGray,Color.gray,Color.lightGray,
Color.pink,Color.cyan};
protected int shape_counter = 0;
protected int paint_counter = -1;
/**
*
*/
public LineGraph() {
super();
}
/**
* @param layout The {@link LayoutManager} to be used
*/
public LineGraph(LayoutManager layout) {
super(layout);
}
/**
* @param layout The {@link LayoutManager} to be used
* @param isDoubleBuffered Flag whether double buffering should be used
*/
public LineGraph(LayoutManager layout, boolean isDoubleBuffered) {
super(layout, isDoubleBuffered);
}
public void setData(double[][] data) {
this.data = data;
}
public void setTitle(String title) {
this.title = title;
}
public void setXAxisTitle(String title) {
this.xAxisTitle = title;
}
public void setYAxisTitle(String title) {
this.yAxisTitle = title;
}
public void setXAxisLabels(String[] labels) {
this.xAxisLabels = labels;
}
public void setYAxisLabels(String[] label) {
this.yAxisLabel = label;
}
public void setWidth(int w) {
this.width = w;
}
public void setHeight(int h) {
this.height = h;
}
@Override
public void paintComponent(Graphics g) {
// reset the paint counter
this.paint_counter = -1;
if (data != null && this.title != null && this.xAxisLabels != null &&
this.xAxisTitle != null && this.yAxisLabel != null &&
this.yAxisTitle != null) {
drawSample(this.title,this.xAxisLabels,this.xAxisTitle,
this.yAxisTitle,this.data,this.width,this.height,g);
}
}
private void drawSample(String _title, String[] _xAxisLabels, String _xAxisTitle,
String _yAxisTitle, double[][] _data, int _width, int _height, Graphics g) {
try {
if (_width == 0) {
_width = 450;
}
if (_height == 0) {
_height = 250;
}
this.setPreferredSize(new Dimension(_width,_height));
DataSeries dataSeries = new DataSeries( _xAxisLabels, _xAxisTitle, _yAxisTitle, _title );
String[] legendLabels= yAxisLabel;
Paint[] paints = this.createPaint(_data.length);
Shape[] shapes = createShapes(_data.length);
Stroke[] lstrokes = createStrokes(_data.length);
LineChartProperties lineChartProperties= new LineChartProperties(lstrokes,shapes);
AxisChartDataSet axisChartDataSet= new AxisChartDataSet( _data,
legendLabels,
paints,
ChartType.LINE,
lineChartProperties );
dataSeries.addIAxisPlotDataSet( axisChartDataSet );
ChartProperties chartProperties = new ChartProperties();
AxisProperties axisProperties = new AxisProperties();
// show the grid lines, to turn it off, set it to zero
axisProperties.getYAxisProperties().setShowGridLines(1);
axisProperties.setXAxisLabelsAreVertical(true);
// set the Y Axis to round
DataAxisProperties daxp = (DataAxisProperties)axisProperties.getYAxisProperties();
daxp.setRoundToNearest(1);
LegendProperties legendProperties = new LegendProperties();
AxisChart axisChart = new AxisChart(
dataSeries, chartProperties, axisProperties,
legendProperties, _width, _height );
axisChart.setGraphics2D((Graphics2D) g);
axisChart.render();
} catch (Exception e) {
log.error("Error while rendering axis chart. {}", e.getMessage());
}
}
/**
* Since we only have 4 shapes, the method will start with the first shape
* and keep cycling through the shapes in order.
*
* @param count
* The number of shapes to be created
* @return the first n shapes
*/
public Shape[] createShapes(int count) {
Shape[] shapes = new Shape[count];
for (int idx=0; idx < count; idx++) {
shapes[idx] = nextShape();
}
return shapes;
}
/**
* Return the next shape
* @return the next shape
*/
public Shape nextShape() {
this.shape_counter++;
if (shape_counter >= (SHAPE_ARRAY.length - 1)) {
shape_counter = 0;
}
return SHAPE_ARRAY[shape_counter];
}
/**
* Create a given number of {@link Stroke}s
*
* @param count
* The number of strokes to be created
* @return the first count strokes
*/
public Stroke[] createStrokes(int count) {
Stroke[] str = new Stroke[count];
for (int idx=0; idx < count; idx++) {
str[idx] = nextStroke();
}
return str;
}
/**
* method always return a new BasicStroke with 1.0f weight
* @return a new BasicStroke with 1.0f weight
*/
public Stroke nextStroke() {
return new BasicStroke(1.0f);
}
/**
* return an array of Paint with different colors. The current
* implementation will cycle through 12 colors if a line graph has more than
* 12 entries
*
* @param count
* The number of {@link Paint}s to be created
* @return an array of Paint with different colors
*/
public Paint[] createPaint(int count) {
Paint[] pts = new Paint[count];
for (int idx=0; idx < count; idx++) {
pts[idx] = nextPaint();
}
return pts;
}
/**
* The method will return the next paint color in the PAINT_ARRAY.
* Rather than return a random color, we want it to always go through
* the same sequence. This way, the same charts will always use the
* same color and make it easier to compare side by side.
* @return the next paint color in the PAINT_ARRAY
*/
public Paint nextPaint() {
this.paint_counter++;
if (this.paint_counter == (PAINT_ARRAY.length - 1)) {
this.paint_counter = 0;
}
return PAINT_ARRAY[this.paint_counter];
}
}
