using JFreeChart with SWT and/or JFace

[ingo]

hallo,

i'm using the ecplice-ide and develop with swt/jface. it is possible to using JFreeChart with swt/jface ?

thank's

[mst]

I'm, into this problem to.
The bridge is to use SWT_AWT.
See below:

Code: Select all

protected void createContents() {
		shell = new Shell();
		shell.setSize(500, 375);
		shell.setText("SWT Application");

		final Composite drawarea = new Composite(shell, SWT.NONE);
		drawarea.setBounds(65, 65, 317, 192);
		Frame canvasFrame = SWT_AWT.new_Frame(drawarea);
		final java.awt.Canvas canvas = new java.awt.Canvas();
		canvasFrame.add(canvas);
		final java.awt.Graphics2D g2d = (java.awt.Graphics2D) canvas.getGraphics();
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,	RenderingHints.VALUE_ANTIALIAS_ON);

// and so on...		
		
	}

regards
mst

[ingo]

exist a way WITHOUT awt ??

Code: Select all

protected Control createContents(Composite parent){
    TableColumn column;

    final Composite composite = new Composite(parent,SWT.EMBEDDED);
    composite.setLayout(new FillLayout());
    SashForm sash       = new SashForm(composite,SWT.VERTICAL); 
    Composite compChart = new Composite(sash,SWT.BORDER);

    // create chart-object for upper sash
    CategoryDataset dataset = createDataset();
    JFreeChart chart        = createChart(dataset);
    ChartPanel chartPanel   = new ChartPanel(chart, false);
    
    ??? add chart to compChart WITHOUT any awt-objects ???

    // create and fill tableviewer for lower sash
    viewer = new TableViewer(sash,SWT.BORDER|SWT.HORIZONTAL|SWT.VERTICAL);
    sash.setWeights(new int[]{60,40});

    Table table = viewer.getTable();
    table.setLinesVisible(true);
    table.setHeaderVisible(true);
    ...
    return composite;
}

regards
ingo

[Taqua]

Hi,

JFreeChart is a standards compliant library and aims to be 100% Java. Support of non-standard (and non-superior) component systems does not offer anything valuable. The SWT is not faster than the AWT/Swing and is not platform independent.

JFreeChart relies on Java2D and will not work without that API. You have to use the bridge code offered by SWT if you want to use JFreeChart. There is no other way.

Have mo' fun,
said Thomas

[ingo]

Hallo,

thanks for this information.

Ingo

[Guest]

Actually, there is another way, which I just successfully prototyped a few minutes ago. Draw the chart to memory (as JPEG, PNG, etc) and then render an SWT image from the exported image in memory.

The code looks something like this:

Code: Select all

		Rectangle _size = ((Canvas) event.widget).getBounds();
		ByteArrayOutputStream outstream = new ByteArrayOutputStream();
		ChartUtilities.writeChartAsPNG(outstream, _chart, _size.width, _size.height);

		byte[] image_buffer = outstream.toByteArray();
		ByteArrayInputStream instream = new ByteArrayInputStream(image_buffer);
		ImageData image_data = new ImageData(instream);
		_image = new Image(event.display, image_data);
		event.gc.drawImage(_image, 0, 0);