Examples with OffscreenGraph eu.esdihumboldt.hale.ui.util.graph.OffscreenGraph used on opensource projects

Example 1 with OffscreenGraph

use of eu.esdihumboldt.hale.ui.util.graph.OffscreenGraph in project hale by halestudio.

the class HtmlMappingExporter method saveImageToFile.

private void saveImageToFile(final Cell cell, File filesDir) {
    Display display;
    if (Display.getCurrent() != null) {
        // use the current display if available
        display = Display.getCurrent();
    } else {
        try {
            // use workbench display if available
            display = PlatformUI.getWorkbench().getDisplay();
        } catch (Throwable e) {
            // use a dedicated display thread if no workbench is
            // available
            display = DisplayThread.getInstance().getDisplay();
        }
    }
    // creates a unique id for each cell
    String cellId = cellIds.getId(cell);
    final File file = new File(filesDir, "img_" + cellId + ".png");
    display.syncExec(new Runnable() {

        @Override
        public void run() {
            OffscreenGraph offscreenGraph = new OffscreenGraph(600, 200) {

                @Override
                protected void configureViewer(GraphViewer viewer) {
                    IContentProvider contentProvider = new CellGraphContentProvider();
                    GraphLabelProvider labelProvider = new GraphLabelProvider(null, HaleUI.getServiceProvider());
                    viewer.setContentProvider(contentProvider);
                    viewer.setLabelProvider(labelProvider);
                    viewer.setInput(cell);
                }
            };
            Graph graph = offscreenGraph.getGraph();
            Dimension dimension = computeSize(graph);
            // minimum width = 600
            offscreenGraph.resize(dimension.width > 600 ? dimension.width : 600, dimension.height);
            try {
                offscreenGraph.saveImage(new BufferedOutputStream(new FileOutputStream(file)), null);
            } catch (Exception e) {
                reporter.error(new IOMessageImpl("Can not create image", e));
            } finally {
                offscreenGraph.dispose();
            }
        }
    });
}

Example 2 with OffscreenGraph

use of eu.esdihumboldt.hale.ui.util.graph.OffscreenGraph in project hale by halestudio.

the class ImageContent method getImageContent.

/**
 * Get the function image for the function with the given identifier.
 *
 * @param func_id the function identifier
 * @param tempDir the temporary directory where the function image may be
 *            stored
 * @return the function image input stream or <code>null</code>
 * @throws Exception if an error occurs generating the image
 */
public static InputStream getImageContent(String func_id, File tempDir) throws Exception {
    final FunctionDefinition<?> function = FunctionUtil.getFunction(func_id, null);
    if (function == null) {
        log.warn("Unknown function " + func_id);
        return null;
    }
    final File _functionFile = new File(tempDir, func_id + ".png");
    if (!_functionFile.exists()) {
        Display display;
        if (Display.getCurrent() != null) {
            // use the current display if available
            display = Display.getCurrent();
        } else {
            try {
                // use workbench display if available
                display = PlatformUI.getWorkbench().getDisplay();
            } catch (Throwable e) {
                // use a dedicated display thread if no workbench is
                // available
                display = DisplayThread.getInstance().getDisplay();
            }
        }
        display.syncExec(new Runnable() {

            @Override
            public void run() {
                // create an initial off-screen graph with fixed values;
                // resize the graph after computing the figures width and
                // height
                OffscreenGraph off_graph = new OffscreenGraph(300, 200) {

                    @Override
                    protected void configureViewer(GraphViewer viewer) {
                        LayoutAlgorithm algo = new FunctionTreeLayoutAlgorithm();
                        FunctionGraphContentProvider stcp = new FunctionGraphContentProvider();
                        // XXX no service provider given
                        FunctionGraphLabelProvider fglp = new FunctionGraphLabelProvider(null, false);
                        viewer.setContentProvider(stcp);
                        viewer.setLabelProvider(fglp);
                        viewer.setInput(function);
                        viewer.setLayoutAlgorithm(algo);
                    }
                };
                Graph graph = off_graph.getGraph();
                Dimension dim = computeSize(graph);
                int width;
                if (dim.width > 450) {
                    width = dim.width;
                } else {
                    // minimum width = 450
                    width = 450;
                }
                int height = dim.height;
                off_graph.resize(width, height);
                try {
                    off_graph.saveImage(new BufferedOutputStream(new FileOutputStream(_functionFile)), null);
                } catch (IOException e) {
                    log.warn("Conversion from Graph to Image failed!");
                } finally {
                    off_graph.dispose();
                }
            }
        });
    }
    if (_functionFile.exists()) {
        return new FileInputStream(_functionFile);
    }
    return null;
}