org.eclipse.gef.editparts.SimpleRootEditPart Java Examples

/**
 * Creates a basic GEF viewer in the specified container and with the
 * specified EditPartFactory.
 * 
 * @param container
 *            The Composite that will contain the viewer.
 * @param factory
 *            The factory used to create the viewer's EditParts.
 */
public static GraphicalViewer createViewer(Composite container,
		EditPartFactory factory) {
	// Create the GraphicalViewer. This is fairly standard procedure for
	// GEF.

	// Use this to test re-sizing of window (this viewer does not create
	// scroll bars).
	GraphicalViewer viewer = new GraphicalViewerImpl();
	viewer.setRootEditPart(new SimpleRootEditPart());
	viewer.createControl(container);

	// Pass the custom EditPartFactory and the Grid model to the
	// GraphicalViewer.
	viewer.setEditPartFactory(factory);

	// Set the GraphicalViewer's EditDomain to a default.
	viewer.setEditDomain(new DefaultEditDomain(null));

	return viewer;
}
 

protected void createDefaultRoot() {
	setRootEditPart(new SimpleRootEditPart(){
		@Override
		protected IFigure createFigure() {
			Figure figure = new Figure();
			figure.setLayoutManager(new StackLayout());
			return figure;
		}
	});
}
 

/**
 * Given a GEF GraphicalViewer, this method creates a save file dialog and
 * will save the contents of the viewer as an image file. Supported
 * extensions include PNG, JPG, and BMP.
 * 
 * @param viewer
 *            The GraphicalViewer to save as an image.
 */
protected static void saveViewerImage(GraphicalViewer viewer) {

	// Store the allowed extensions in a HashMap.
	HashMap<String, Integer> extensions = new HashMap<String, Integer>(4);
	extensions.put("png", SWT.IMAGE_PNG);
	extensions.put("jpg", SWT.IMAGE_JPEG);
	extensions.put("bmp", SWT.IMAGE_BMP);

	// Make the array of strings needed to pass to the file dialog.
	String[] extensionStrings = new String[extensions.keySet().size()];
	int i = 0;
	for (String extension : extensions.keySet()) {
		extensionStrings[i++] = "*." + extension;
	}

	// Create the file save dialog.
	FileDialog fileDialog = new FileDialog(viewer.getControl().getShell(),
			SWT.SAVE);
	fileDialog.setFilterExtensions(extensionStrings);
	fileDialog.setOverwrite(true);

	// Get the path of the new/overwritten image file.
	String path = fileDialog.open();

	// Return if the user cancelled.
	if (path == null) {
		return;
	}

	// Get the image type to save from the path's extension.
	String[] splitPath = path.split("\\.");
	int extensionSWT = extensions.get(splitPath[splitPath.length - 1]);

	// Get the root EditPart and its draw2d Figure.
	SimpleRootEditPart rootEditPart = (SimpleRootEditPart) viewer
			.getRootEditPart();
	IFigure figure = rootEditPart.getFigure();

	// Get the image from the Figure.
	org.eclipse.draw2d.geometry.Rectangle bounds = figure.getBounds();
	Image image = new Image(null, bounds.width, bounds.height);
	GC gc = new GC(image);
	SWTGraphics g = new SWTGraphics(gc);
	figure.paint(g);
	g.dispose();
	gc.dispose();

	// Save the file.
	ImageLoader loader = new ImageLoader();
	loader.data = new ImageData[] { image.getImageData() };
	loader.save(path, extensionSWT);
	image.dispose();

	return;
}
 

/**
 * Creates a GEF Viewer with the specified model and factory.
 * 
 * @param container
 *            The Composite that will contain the viewer.
 * @param model
 *            The model for the viewer.
 * @param factory
 *            The factory used to create the viewer's EditParts.
 */
public static GraphicalViewer createViewer(Composite container, Grid model,
		EditPartFactory factory) {
	// Create the GraphicalViewer. This is fairly standard procedure for
	// GEF.
	// GraphicalViewer viewer = new ScrollingGraphicalViewer();
	// Use this to test re-sizing of window (this viewer does not create
	// scroll bars).
	GraphicalViewer viewer = new GraphicalViewerImpl();
	viewer.setRootEditPart(new SimpleRootEditPart());
	viewer.createControl(container);
	// Pass the custom EditPartFactory and the Grid model to the
	// GraphicalViewer.
	viewer.setEditPartFactory(factory);
	viewer.setContents(model);
	// Set the GraphicalViewer's EditDomain to a default.
	viewer.setEditDomain(new DefaultEditDomain(null));

	/* -- Set the viewer's current selection of cells. -- */
	// Here, we need to set the viewer's current selection of EditParts to
	// the currently-selected Cells in the Grid model. This allows us to
	// show the user the Cells that were previously selected. To do this, we
	// need to add all of the EditParts for selected Cells to the viewer's
	// StructuredSelection.

	// Create the object array needed to create the StructuredSelection.
	List<Object> selectionList = new ArrayList<Object>();

	// Add the EditParts for all selected Cells to the ArrayList.
	for (Cell cell : model.getCells()) {
		if (cell.getSelected()) {
			// Get the Cell's EditPart.
			CellEditPart editPart = (CellEditPart) viewer
					.getEditPartRegistry().get(cell);

			// Add the CellEditPart to the array.
			selectionList.add(editPart);
		}
	}

	// Create the StructuredSelection from the array and pass it to viewer.
	viewer.setSelection(new StructuredSelection(selectionList.toArray()));
	/* -------------------------------------------------- */

	return viewer;
}
 

protected void createDefaultRoot() {
	setRootEditPart(new SimpleRootEditPart());
}