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

            // Account for the scaling in the pane.
            Point2D transformedPoint = new Point2D.Double();
            pane.getTransformContext().getInverseTransform().transform(point,
                    transformedPoint);


            FigureLayer layer = pane.getForegroundLayer();


            // Find the figure under the point.
            // NOTE: Unfortunately, FigureLayer.getCurrentFigure() doesn't
            // work with a drop target (I guess it hasn't seen the mouse events),
            // so we have to use a lower level mechanism.
            double halo = layer.getPickHalo();
            double width = halo * 2;
            Rectangle2D region = new Rectangle2D.Double(transformedPoint.getX()
                    - halo, transformedPoint.getY() - halo, width, width);
            CanvasComponent figureUnderMouse = layer.pick(region);


            // Find a user object belonging to the figure under the mouse
            // or to any figure containing it (it may be a composite figure).
            Object objectUnderMouse = null;

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        } else if (source instanceof JGraph) {
            // This is an absurdly convoluted way to get the info we need.
            // But there seems to be no other way.
            // This is an architectural flaw in vergil.
            GraphPane pane = ((JGraph) source).getGraphPane();
            FigureLayer layer = pane.getForegroundLayer();
            CanvasComponent currentFigure = layer.getCurrentFigure();
            GraphController controller = pane.getGraphController();
            GraphModel model = controller.getGraphModel();


            if (currentFigure != null) {
                _target = null;


                while ((_target == null) && (currentFigure != null)) {
                    Object object = currentFigure;


                    if (object instanceof Figure) {
                        object = ((Figure) currentFigure).getUserObject();
                    }


                    _target = (NamedObj) model.getSemanticObject(object);
                    currentFigure = currentFigure.getParent();
                }


                // NOTE: _target may end up null here!
                if (_target == null) {
                    throw new InternalErrorException(
                            "Internal error: Figure has no associated Ptolemy II object!");
                }
            } else {
                _target = (NamedObj) model.getRoot();
            }


            _sourceType = HOTKEY_TYPE;


            // FIXME: set _x and _y.  How to do this?
            _x = 0;
            _y = 0;


            // Set the parent.
            CanvasPane canvasPane = layer.getCanvasPane();
            parent = canvasPane.getCanvas();
        } else {
            _sourceType = null;
            _target = null;
            parent = null;

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            FSMGraphModel model = (FSMGraphModel) getGraphModel();
            model.getArcModel().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 removed 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
                Figure ef = getFigure(link);
                getSelectionModel().addSelection(ef);


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

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     * each possible anchor point. Note that the labels appear to
     * be in the wrong locations: but they are the anchor of the
     * label itself, not the displayed square, so they are correct.
     */
    public void createLabels() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // The data to display
        int[] anchors = { SwingConstants.CENTER, SwingConstants.NORTH,
                SwingConstants.NORTH_EAST, SwingConstants.EAST,
                SwingConstants.SOUTH_EAST, SwingConstants.SOUTH,
                SwingConstants.SOUTH_WEST, SwingConstants.WEST,
                SwingConstants.NORTH_WEST };


        String[] labels = { "center", "north", "north-east", "east",
                "south-east", "south", "south-west", "west", "north-west" };


        String[] fonts = { "Dialog", "DialogInput", "Monospaced", "Serif",
                "SansSerif", "Symbol", "Times", "Courier", "Helvetica" };


        int[] styles = { Font.PLAIN, Font.BOLD, Font.ITALIC,
                Font.BOLD | Font.ITALIC, Font.PLAIN, Font.BOLD, Font.ITALIC,
                Font.BOLD | Font.ITALIC, Font.PLAIN };


        // Draw a rectangle to position them
        BasicRectangle square = new BasicRectangle(160, 80, 120, 120);
        square.setStrokePaint(Color.gray);
        layer.add(square);


        // Create the labels
        for (int i = 0; i < anchors.length; i++) {
            LabelFigure labelFigure = new LabelFigure(labels[i], fonts[i],
                    styles[i], 20);


            // Set the anchor
            labelFigure.setAnchor(anchors[i]);


            // Move the anchor to the right location
            Point2D pt = CanvasUtilities.getLocation(square.getBounds(),
                    CanvasUtilities.reverseDirection(anchors[i]));
            labelFigure.translateTo(pt);


            // Add to the layer
            layer.add(labelFigure);
            labelFigure.setInteractor(defaultInteractor);


            // Draw a small circle there so we can see it
            Figure mark = new BasicEllipse(pt.getX() - 2, pt.getY() - 2, 4, 4,
                    Color.red);
            layer.add(mark);
        }
    }

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    /** Create a couple of figures with labels attached to them.
     * This simple illustrates the fact that labels can be easily
     * attached to any arbitrary figure.
     */
    public void createLabeledWrappers() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        Figure a = new BasicEllipse(420, 100, 100, 50);
        LabelWrapper wrapperA = new LabelWrapper(a, "Foo!\nBar!\nBaz!");
        layer.add(wrapperA);
        wrapperA.setInteractor(defaultInteractor);


        Figure b = new BasicRectangle(460, 200, 50, 40, Color.green);
        LabelWrapper wrapperB = new LabelWrapper(b, "Bar!");
        wrapperB.setAnchor(SwingConstants.SOUTH_WEST);
        wrapperB.getLabel().setAnchor(SwingConstants.NORTH_WEST);
        layer.add(wrapperB);
        wrapperB.setInteractor(defaultInteractor);
    }

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    /** Create instances of Vector Figures and make them
     * draggable and resizeable.
     */
    public void createFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create a controller to do the work.
        BasicController controller = new BasicController(graphicsPane);
        SelectionInteractor defaultInteractor = controller
                .getSelectionInteractor();
        BoundsManipulator manip = new BoundsManipulator();
        defaultInteractor.setPrototypeDecorator(manip);


        // Create a simple Vector Figure that draws a cross
        VectorFigure one = new VectorFigure();
        one.add(new Line2D.Double(0.0, 0.0, 100.0, 100.0));
        one.add(new Line2D.Double(100.0, 0.0, 0.0, 100.0));
        layer.add(one);
        one.setInteractor(defaultInteractor);


        // Here's a more complicated one, where we explicitly set the
        // shape to be a circle.
        VectorFigure two = new VectorFigure();
        Shape circle = new Ellipse2D.Double(0.0, 0.0, 100.0, 100.0);


        // Draw some filled circles
        two.fillMode();
        two.setShape(circle);
        two.add(Color.blue);
        two.add(circle);


        two.add(Color.yellow);
        two.add(new Ellipse2D.Double(10.0, 10.0, 80.0, 80.0));


        two.add(Color.red);
        two.add(new Ellipse2D.Double(20.0, 20.0, 60.0, 60.0));


        // Draw some lines
        two.lineMode();
        two.add(Color.black);
        two.add(new Line2D.Double(14.65, 14.65, 85.35, 85.35));
        two.add(new Line2D.Double(85.35, 14.65, 14.65, 85.35));


        two.translate(200, 100);
        layer.add(two);
        two.setInteractor(defaultInteractor);
    }

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    /** Create instances of the class defined
     * in this file. To make the demo a little more interesting,
     * make them draggable.
     */
    public void createFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create a controller to do the work.
        BasicController controller = new BasicController(graphicsPane);
        SelectionInteractor defaultInteractor = controller
                .getSelectionInteractor();
        BoundsManipulator manip = new BoundsManipulator();
        defaultInteractor.setPrototypeDecorator(manip);


        // Create a custom rectangle and make it draggable
        AbstractFigure blue = new CustomRectangle(10.0, 10.0, 50.0, 50.0);
        layer.add(blue);
        blue.setInteractor(defaultInteractor);
        blue.setToolTipText("Blue figure 1");


        // Create a custom rectangle and make it draggable
        AbstractFigure blue2 = new CustomRectangle(100.0, 100.0, 100.0, 50.0);
        layer.add(blue2);
        blue2.setInteractor(defaultInteractor);
        blue2.setToolTipText("Blue figure 2");


        // Create an image figure and make it draggable
        Image img = Toolkit.getDefaultToolkit().getImage(IMAGE_FILE_NAME);
        MediaTracker tracker = new MediaTracker(canvas);
        tracker.addImage(img, 0);


        try {
            tracker.waitForID(0);
        } catch (InterruptedException e) {
            System.err.println(e + "... in FigureTutorial");
        }


        ImageFigure imgFig = new ImageFigure(img);
        imgFig.translate(300, 100);
        layer.add(imgFig);
        imgFig.setInteractor(defaultInteractor);
        imgFig.setToolTipText("Image figure");
    }

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    }


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


        // NORTH
        StraightTerminal north = new StraightTerminal();


        //Site connectNorth = north.getConnectSite();
        Blob blobNorth = new Blob();
        blobNorth.setSizeUnit(5.0);
        north.setEnd(blobNorth);
        iconFigure.addTerminal(north, SwingConstants.NORTH, 50);


        // SOUTH
        StraightTerminal south = new StraightTerminal();


        //Site connectSouth = south.getConnectSite();
        Blob blobSouth = new Blob();
        blobSouth.setStyle(Blob.BLOB_DIAMOND);
        blobSouth.setSizeUnit(5.0);
        blobSouth.setFilled(false);
        south.setEnd(blobSouth);
        iconFigure.addTerminal(south, SwingConstants.SOUTH, 50);


        // WEST
        StraightTerminal west = new StraightTerminal();


        //Site connectWest = west.getConnectSite();
        Arrowhead arrowWest = new Arrowhead();
        west.setEnd(arrowWest);
        iconFigure.addTerminal(west, SwingConstants.WEST, 50);


        // EAST
        StraightTerminal east = new StraightTerminal();


        //Site connectEast = east.getConnectSite();
        Arrowhead arrowEast = new Arrowhead();
        arrowEast.setFlipped(true);
        east.setEnd(arrowEast);
        iconFigure.addTerminal(east, SwingConstants.EAST, 50);


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

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    /** Create an icon. The icon's graphic is created
     * by directly calling the PaintedShape API.
     */
    public void createIcon1() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create the graphic
        PaintedList graphic = new PaintedList();


        Polygon2D polygon = new Polygon2D.Double();
        polygon.moveTo(30, 50);
        polygon.lineTo(70, 80);
        polygon.lineTo(70, 20);
        graphic.add(new PaintedShape(polygon, Color.red, 1.0f));


        Line2D line1 = new Line2D.Double(10, 50, 30, 50);
        graphic.add(new PaintedPath(line1));


        Line2D line2 = new Line2D.Double(70, 50, 90, 50);
        graphic.add(new PaintedPath(line2));


        // Create the icon
        BasicRectangle background = new BasicRectangle(0, 0, 100, 100,
                Color.green.brighter().brighter());
        IconFigure _icon1 = new IconFigure(background, graphic);
        layer.add(_icon1);
        _icon1.setInteractor(defaultInteractor);


        // Add its terminals
        createTerminals(_icon1);
        _icon1.translate(100, 100);

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    /** Create an icon. The icon's graphic is created
     * by using GraphicsParse.
     */
    public void createIcon2() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Use a hash-table
        PaintedFigure g = new PaintedFigure();


        HashMap map = new HashMap();
        map.put("coords", "30 50 70 80 70 20");
        map.put("fill", "red");
        map.put("width", "1");
        g.add(GraphicsParser.createPaintedObject("polygon", map));


        //Line2D line1 = new Line2D.Double(10,50,30,50);
        //f.add(new PaintedPath(line1));
        //Line2D line2 = new Line2D.Double(70,50,90,50);
        //f.add(new PaintedPath(line2));
        layer.add(g);
        g.setInteractor(defaultInteractor);
        g.translate(100, 0);
    }

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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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