Examples with LayoutAlgorithm org.eclipse.zest.layouts.LayoutAlgorithm used on opensource projects

Example 1 with LayoutAlgorithm

use of org.eclipse.zest.layouts.LayoutAlgorithm in project hale by halestudio.

the class AbstractMappingView method createViewControl.

@Override
public void createViewControl(Composite parent) {
    viewer = new GraphViewer(parent, SWT.BORDER);
    viewer.setContentProvider(createContentProvider());
    // viewer.setContentProvider(new CellRelationshipContentProvider());
    // viewer.setContentProvider(new NestedCellRelationshipContentProvider());
    viewer.setLabelProvider(createLabelProvider(viewer));
    viewer.setInput(null);
    LayoutAlgorithm layout = createLayout();
    viewer.setLayoutAlgorithm(layout, true);
    viewer.applyLayout();
    fillToolBar();
    // set selection provider
    selectionFacade = new SelectionProviderFacade();
    selectionFacade.setSelectionProvider(getViewer());
    getSite().setSelectionProvider(new PostSelectionSupport(selectionFacade));
    viewer.getControl().addKeyListener(new KeyListener() {

        @Override
        public void keyReleased(KeyEvent e) {
            if (e.keyCode == 'a' && (e.stateMask & SWT.MODIFIER_MASK) == SWT.CTRL) {
                // XXX even though getSelection returns the current state, a
                // selection update is not triggered by the control
                // -> force selection change event after Ctrl+A
                ISelection sel = viewer.getSelection();
                selectionFacade.setSelection(sel);
            }
        }

        @Override
        public void keyPressed(KeyEvent e) {
        // nothing to do
        }
    });
    // create context menu
    new ViewerMenu(getSite(), getViewer()) {

        /**
         * @see eu.esdihumboldt.hale.ui.util.ViewContextMenu#menuAboutToShow(org.eclipse.jface.action.IMenuManager)
         */
        @Override
        public void menuAboutToShow(IMenuManager manager) {
            super.menuAboutToShow(manager);
            AbstractMappingView.this.menuAboutToShow(manager);
        }
    };
}

Example 2 with LayoutAlgorithm

use of org.eclipse.zest.layouts.LayoutAlgorithm in project hale by halestudio.

the class AbstractMappingView method createLayout.

/**
 * Create the initial layout to use
 *
 * @return the layout
 */
protected LayoutAlgorithm createLayout() {
    LayoutAlgorithm layout;
    layout = new TreeLayoutAlgorithm(TreeLayoutAlgorithm.RIGHT_LEFT);
    return layout;
}

Example 3 with LayoutAlgorithm

use of org.eclipse.zest.layouts.LayoutAlgorithm 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;
}