protected void configureEditPartViewer(EditPartViewer viewer) {
ScalableFreeformRootEditPart rootEditPart = new ScalableFreeformRootEditPart();
viewer.setRootEditPart(rootEditPart);
getGraphicalViewer()
.setContextMenu(
new ProcessContextMenuProvider(
getParentEditor().getActionRegistry(), getGraphicalViewer()));
((FigureCanvas) viewer.getControl()).setScrollBarVisibility(FigureCanvas.ALWAYS);
}
/**
* Returns the bytes of an encoded image for the specified IFigure in the specified format.
*
* @param figure the Figure to create an image for.
* @param format one of SWT.IMAGE_BMP, SWT.IMAGE_BMP_RLE, SWT.IMAGE_GIF SWT.IMAGE_ICO,
* SWT.IMAGE_JPEG, or SWT.IMAGE_PNG
* @return the bytes of an encoded image for the specified Figure
*/
private byte[] createImage(final IFigure figure, final int format) {
final Device device = viewer.getControl().getDisplay();
final Rectangle r = figure.getBounds();
final ByteArrayOutputStream result = new ByteArrayOutputStream();
Image image = null;
GC gc = null;
Graphics g = null;
try {
image = new Image(device, r.width, r.height);
gc = new GC(image);
g = new SWTGraphics(gc);
g.translate(r.x * -1, r.y * -1);
figure.paint(g);
final ImageLoader imageLoader = new ImageLoader();
imageLoader.data = new ImageData[] {image.getImageData()};
imageLoader.save(result, format);
} catch (Exception e) {
// the image size may not exceed 16M, svg requires less space for graphs than png and jpeg
e.printStackTrace();
} finally {
if (g != null) {
g.dispose();
}
if (gc != null) {
gc.dispose();
}
if (image != null) {
image.dispose();
}
}
return result.toByteArray();
}