package org.swtchart.examples.advanced;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.swtchart.Chart;
import org.swtchart.ILineSeries;
import org.swtchart.ISeries;
import org.swtchart.ISeries.SeriesType;
/**
* An example to get bounds of series symbol.
*/
public class SymbolBoundsExample {
private static final double[] ySeries1 = { 0.26, 0.25, 0.29, 0.31, 0.32 };
private static final double[] ySeries2 = { 0.32, 0.31, 0.27, 0.28, 0.26 };
/**
* The main method.
*
* @param args
* the arguments
*/
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Symbol Bounds");
shell.setSize(500, 400);
shell.setLayout(new FillLayout());
createChart(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
/**
* create the chart.
*
* @param parent
* The parent composite
* @return The created chart
*/
static public Chart createChart(Composite parent) {
// create a chart
final Chart chart = new Chart(parent, SWT.NONE);
chart.getTitle().setText("Symbol Bounds");
// create line series
ILineSeries series1 = (ILineSeries) chart.getSeriesSet().createSeries(
SeriesType.LINE, "series 1");
series1.setYSeries(ySeries1);
ILineSeries series2 = (ILineSeries) chart.getSeriesSet().createSeries(
SeriesType.LINE, "series 2");
series2.setYSeries(ySeries2);
series2
.setLineColor(Display.getDefault()
.getSystemColor(SWT.COLOR_RED));
// adjust the axis range
chart.getAxisSet().adjustRange();
// add mouse move listener to open tooltip on data point
chart.getPlotArea().addMouseMoveListener(new MouseMoveListener() {
public void mouseMove(MouseEvent e) {
for (ISeries series : chart.getSeriesSet().getSeries()) {
for (int i = 0; i < series.getYSeries().length; i++) {
Point p = series.getPixelCoordinates(i);
double distance = Math.sqrt(Math.pow(e.x - p.x, 2)
+ Math.pow(e.y - p.y, 2));
if (distance < ((ILineSeries) series).getSymbolSize()) {
setToolTipText(series, i);
return;
}
}
}
chart.getPlotArea().setToolTipText(null);
}
private void setToolTipText(ISeries series, int index) {
chart.getPlotArea().setToolTipText(
"Series: " + series.getId() + "\nValue: "
+ series.getYSeries()[index]);
}
});
return chart;
}
}