Examples of diva.canvas.FigureLayer

diva.canvas.FigureLayer
A figure layer is a layer on which Figures can be drawn. It contains a z-list in which all the contained figures are held, and implements wrappers for most of the z-list methods to provide flexible access to the contained figures. Figures are also stored at contiguous integer indexes, with index zero being the "topmost" figure and the highest index being the "lowest" figure.
FigureLayer responds to events on figures themselves by forwarding the events to interactors attached to a hit figure. It does not support events on the layer itself (see EventLayer for that). @version $Id: FigureLayer.java,v 1.22 2005/07/08 19:54:46 cxh Exp $ @author John Reekie @Pt.AcceptedRating Yellow

     * the nmouse moves.
     */
    public void setupInteraction() {
        // Because this pane has connectors on it, we make the pick
        // halo larger than the default so we can click-select connectors
        FigureLayer layer = graphicsPane.getForegroundLayer();
        layer.setPickHalo(4.0);


        // Add the default interactor to both figures
        SelectionInteractor si = controller.getSelectionInteractor();
        figureA.setInteractor(si);
        figureB.setInteractor(si);

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    }


    /** Create a collection of terminals.
     */
    public void createTerminals() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Draw a rectangle to position them
        BasicRectangle square = new BasicRectangle(160, 80, 80, 80);
        square.setStrokePaint(Color.gray);
        layer.add(square);


        // Create a BoundsGeometry to help get sites
        BoundsGeometry _geometry = new BoundsGeometry(square, square
                .getBounds());


        // Create a set of terminals, one by one
        // NORTH
        StraightTerminal north = new StraightTerminal(_geometry.getN());


        //Site connectNorth = north.getConnectSite();
        Blob blobNorth = new Blob();
        blobNorth.setSizeUnit(5.0);
        north.setEnd(blobNorth);
        layer.add(north);


        // SOUTH
        StraightTerminal south = new StraightTerminal(_geometry.getS());


        //Site connectSouth = south.getConnectSite();
        Blob blobSouth = new Blob();
        blobSouth.setStyle(Blob.BLOB_DIAMOND);
        blobSouth.setSizeUnit(5.0);
        blobSouth.setFilled(false);
        south.setEnd(blobSouth);
        layer.add(south);


        // WEST
        StraightTerminal west = new StraightTerminal(_geometry.getW());


        //Site connectWest = west.getConnectSite();
        Arrowhead arrowWest = new Arrowhead();
        west.setEnd(arrowWest);
        layer.add(west);


        // EAST
        StraightTerminal east = new StraightTerminal(_geometry.getE());


        //Site connectEast = east.getConnectSite();
        Arrowhead arrowEast = new Arrowhead();
        arrowEast.setFlipped(true);
        east.setEnd(arrowEast);
        layer.add(east);


        // Make sure it's clean now
        layer.repaint();
    }

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     * the BasicRectangle class. This class, together with a number
     * other useful predefined figure classes, is contained in the
     * package <b>diva.canvas.toolbox</b>.
     */
    public void createBasicRectangle() {
        FigureLayer layer = graphicsPane.getForegroundLayer();
        Figure rectangle = new BasicRectangle(50, 50, 80, 80, Color.blue);
        layer.add(rectangle);
    }

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     * the BasicShape class, which draws itself using any instance
     * of the Java2D interface, <b>java.awt.Shape</b>. In this example,
     * we use an instance of GeneralPath.
     */
    public void createBasicFigure() {
        FigureLayer layer = graphicsPane.getForegroundLayer();
        GeneralPath path = new GeneralPath();
        path.moveTo(120, 240);
        path.lineTo(240, 240);
        path.quadTo(180, 120, 120, 240);
        path.closePath();


        Figure semi = new BasicFigure(path, Color.green);
        layer.add(semi);
    }

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    /** Create a polyline. Again, this uses the BasicFigure class,
     * but this time the shape is an instance of <b>diva.util.Polyline2D</b>.
     */
    public void createPolyline() {
        FigureLayer layer = graphicsPane.getForegroundLayer();
        Polyline2D path = new Polyline2D.Double();
        path.moveTo(240, 120);
        path.lineTo(280, 140);
        path.lineTo(240, 160);
        path.lineTo(280, 180);
        path.lineTo(240, 200);
        path.lineTo(280, 220);
        path.lineTo(240, 240);


        Figure line = new BasicFigure(path);
        layer.add(line);
    }

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     */
    public void addEdge(Object edge, Object node, int end, double x, double y) {
        MutableGraphModel model = (MutableGraphModel) _controller
                .getGraphModel();
        Figure nf = _controller.getFigure(node);
        FigureLayer layer = _controller.getGraphPane().getForegroundLayer();
        Site headSite;
        Site tailSite;


        // Temporary sites.  One of these will get blown away later.
        headSite = new AutonomousSite(layer, x, y);

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     * the view, then use any information in that figure to help draw the
     * edge.
     */
    public Figure drawEdge(Object edge) {
        GraphModel model = _controller.getGraphModel();
        FigureLayer layer = _controller.getGraphPane().getForegroundLayer();
        Object tail = model.getTail(edge);
        Object head = model.getHead(edge);


        Connector connector = (Connector) _controller.getFigure(edge);
        Figure tailFigure = _controller.getFigure(tail);

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    /** Create a new edge, add it to the graph controller and add
     * the connector to the selection.
     */
    public void mousePressed(LayerEvent e) {
        Figure source = e.getFigureSource();
        FigureLayer layer = (FigureLayer) e.getLayerSource();


        Object edge = createEdge();


        // Add it to the editor
        // FIXME what about an error?
        _controller.addEdge(edge, source.getUserObject(),
                ConnectorEvent.TAIL_END, e.getLayerX(), e.getLayerY());


        // Add it to the selection so it gets a manipulator, and
        // make events go to the grab-handle under the mouse
        Figure ef = _controller.getFigure(edge);
        _controller.getSelectionModel().addSelection(ef);


        ConnectorManipulator cm = (ConnectorManipulator) ef.getParent();
        GrabHandle gh = cm.getHeadHandle();
        layer.grabPointer(e, gh);
    }

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            ActorGraphModel model = (ActorGraphModel) getGraphModel();
            model.getLinkModel().setTail(link, sourceObject);


            try {
                // add it to the foreground layer.
                FigureLayer layer = getGraphPane().getForegroundLayer();
                Site headSite;
                Site tailSite;


                // Temporary sites.  One of these will get blown away later.
                headSite = new AutonomousSite(layer, event.getLayerX(), event
                        .getLayerY());
                tailSite = new AutonomousSite(layer, event.getLayerX(), event
                        .getLayerY());


                // Render the edge.
                Connector c = getEdgeController(link).render(link, layer,
                        tailSite, headSite);


                // get the actual attach site.
                tailSite = getEdgeController(link).getConnectorTarget()
                        .getTailSite(c, source, event.getLayerX(),
                                event.getLayerY());


                if (tailSite == null) {
                    throw new RuntimeException("Invalid connector target: "
                            + "no valid site found for tail of new connector.");
                }


                // And reattach the connector.
                c.setTailSite(tailSite);


                // Add it to the selection so it gets a manipulator, and
                // make events go to the grab-handle under the mouse
                getSelectionModel().addSelection(c);


                ConnectorManipulator cm = (ConnectorManipulator) c.getParent();
                GrabHandle gh = cm.getHeadHandle();
                layer.grabPointer(event, gh);
            } catch (Exception ex) {
                MessageHandler.error("Drag connection failed:", ex);
            }
        }

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    /** Draw a reference box with the default icon size, 60x40.
     */
    protected void _drawReferenceBox() {
        // The background layer is a FigureLayer, despite the fact that
        // getBackgroundLayer() only returns a CanvasLayer.
        FigureLayer layer = (FigureLayer) getJGraph().getGraphPane()
                .getBackgroundLayer();
        layer.setVisible(true);


        BasicRectangle reference = new BasicRectangle(-30.0, -20.0, 60.0, 40.0,
                0.1f);
        reference.setStrokePaint(Color.BLUE);
        layer.add(reference);
    }

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Related Classes of diva.canvas.FigureLayer

diva.canvas.event.LayerEvent

diva.canvas.interactor.Interactor

diva.canvas.toolbox.BasicCanvasPane

diva.canvas.tutorial.ArcTutorial

diva.canvas.tutorial.ConnectorTutorial

diva.canvas.tutorial.DragTutorial

diva.canvas.tutorial.FigureTutorial

diva.canvas.tutorial.IconTutorial

diva.canvas.tutorial.LabelTutorial

diva.canvas.tutorial.ManipulatorTutorial

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