Re: [nebula-dev] save as bmp, or tif-fileswt xygraph

[Trig Chen <trigchen@xxxxxxxxx>]

Hi Lars,

You can create the plot with a toolbar. The toolbar has export button. The sample code is in:

http://git.eclipse.org/c/nebula/org.eclipse.nebula.git/plain/examples/org.eclipse.nebula.snippets/src/org/eclipse/nebula/snippets/visualization/SimpleToolbarArmedXYGraphExample.java

The relatived code in org.eclipse.nebula.visualization.xygraph.figures.XYGraphToolbar.java is: 

	private void addSnapshotButton() {
		Button snapShotButton = new Button(XYGraphMediaFactory.getInstance().getImage("images/camera.png"));
		snapShotButton.setToolTip(new Label("Save Snapshot to PNG file"));
		addButton(snapShotButton);
		snapShotButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				// Have valid name, so get image
				ImageLoader loader = new ImageLoader();
				Image image = xyGraph.getImage();
				loader.data = "" ImageData[] { image.getImageData() };
				image.dispose();
				// Prompt for file name
				String path = SingleSourceHelper2.getImageSavePath();
				if (path == null || path.length() <= 0)
					return;
				// Assert *.png at end of file name
				if (!path.toLowerCase().endsWith(".png"))
					path = path + ".png";
				// Save
				loader.save(path, SWT.IMAGE_PNG);
			}
		});
	}

Best regards,

Trig

2016-11-18 17:56 GMT+08:00 Lars Ohmann <sohm63@xxxxxx>:

Hello

 

below is the code! It is easy, it just gives a simple plot. How can I save this plot (xygraph) as

a bmp or jpg-file on the PC ? I posted the question on several forums, either the answer is too

complicated or the problem is too trivial for the community.

 

A hint would be very helpful!

 

thanks!

 

package org.eclipse.nebula.visualization.xygraph.examples;

/*******************************************************************************
* Copyright (c) 2010 Oak Ridge National Laboratory.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
******************************************************************************/
import org.eclipse.draw2d.LightweightSystem;
import org.eclipse.nebula.visualization.xygraph.dataprovider.CircularBufferDataProvider;
import org.eclipse.nebula.visualization.xygraph.figures.Ixygraph;
import org.eclipse.nebula.visualization.xygraph.figures.Trace;
import org.eclipse.nebula.visualization.xygraph.figures.xygraph;
import org.eclipse.nebula.visualization.xygraph.figures.Trace.PointStyle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
* A very simple example.
*
* @author Xihui Chen
*
*/
public class SimpleExample {
public static void main(String[] args) {
final Shell shell = new Shell();
shell.setSize(300, 250);
shell.open();

// use LightweightSystem to create the bridge between SWT and draw2D
final LightweightSystem lws = new LightweightSystem(shell);

// create a new XY Graph.
Ixygraph xygraph = new xygraph();
xygraph.setTitle("Simple Example");
// set it as the content of LightwightSystem
lws.setContents(xygraph);

// create a trace data provider, which will provide the data to the
// trace.
CircularBufferDataProvider traceDataProvider = new CircularBufferDataProvider(false);
traceDataProvider.setBufferSize(100);
traceDataProvider.setCurrentXDataArray(new double[] { 10, 23, 34, 45, 56, 78, 88, 99 });
traceDataProvider.setCurrentYDataArray(new double[] { 11, 44, 55, 45, 88, 98, 52, 23 });

// create the trace
Trace trace = new Trace("Trace1-XY Plot", xygraph.getPrimaryXAxis(), xygraph.getPrimaryYAxis(), traceDataProvider);

// set trace property
trace.setPointStyle(PointStyle.XCROSS);

// add the trace to xygraph
xygraph.addTrace(trace);

Display display = Display.getDefault();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}

}
}

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