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

    }


    /** Create the figures.
     */
    public void createFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        _rectangle = new BasicRectangle(50, 50, 80, 80, Color.black);
        layer.add(_rectangle);


        _circle = new BasicEllipse(150, 50, 80, 80, Color.green);
        layer.add(_circle);


        GeneralPath path = new GeneralPath();
        path.moveTo(120, 240);
        path.lineTo(240, 240);
        path.quadTo(180, 120, 120, 240);
        path.closePath();
        _shape = new BasicFigure(path, Color.red);
        layer.add(_shape);


        Polyline2D poly = new Polyline2D.Double();
        poly.moveTo(240, 120);
        poly.lineTo(280, 140);
        poly.lineTo(240, 160);
        poly.lineTo(280, 180);
        poly.lineTo(240, 200);
        poly.lineTo(280, 220);
        poly.lineTo(240, 240);
        _line = new BasicFigure(poly);
        layer.add(_line);
    }

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    /** Create the figures that we will draw connectors between.
     * This is fairly uninteresting.
     */
    public void createFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        figureA = new SitedRectangle(10.0, 10.0, 50.0, 50.0, Color.red);
        figureB = new SitedRectangle(100.0, 100.0, 100.0, 50.0, Color.green);


        layer.add(figureA);
        layer.add(figureB);
    }

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     * Create the connectors between the two figures. We will firstly
     * create one StraightConnector with a circle and an arrowhead
     * on it, and then a ManhattanConnector with a diamond on one end.
     */
    public void createConnectors() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create the first connector
        Site a = figureA.getE();
        Site b = figureB.getN();
        connectorA = new StraightConnector(a, b);


        // Add the circle and arrowhead to it
        Blob blob = new Blob(a.getX(), a.getY(), a.getNormal(),
                Blob.BLOB_CIRCLE);
        connectorA.setTailEnd(blob);


        Arrowhead arrow = new Arrowhead(b.getX(), b.getY(), b.getNormal());
        connectorA.setHeadEnd(arrow);


        // Add it to the layer
        layer.add(connectorA);


        // Create the second connector
        Site c = figureA.getS();
        Site d = figureB.getW();
        connectorB = new ManhattanConnector(c, d);


        // Add the diamond
        Blob diamond = new Blob(c.getX(), c.getY(), c.getNormal(),
                Blob.BLOB_DIAMOND);
        diamond.setSizeUnit(6.0);
        diamond.setFilled(false);
        connectorB.setTailEnd(diamond);


        // Add it to the layer
        layer.add(connectorB);
    }

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     * 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(2.0);


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

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     * means that they behave the same when you mouse on them.
     * The interactor used to move them is an instance of
     * DragInteractor.
     */
    public void createDraggableFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create the interactor to do the work.
        Interactor dragger = new DragInteractor();
        dragger.setMouseFilter(MouseFilter.defaultFilter);


        // Create a rectangle and make it draggable
        BasicFigure blue = new BasicRectangle(10.0, 10.0, 50.0, 50.0,
                Color.blue);
        layer.add(blue);
        blue.setInteractor(dragger);


        // Create a circle and make it draggable
        BasicFigure red = new BasicEllipse(200.0, 200.0, 50.0, 50.0, Color.red);
        layer.add(red);
        red.setInteractor(dragger);
    }

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    /** Create another simple figures and make it draggable within
     * a region of the canvas. This example uses an instance of
     * BoundedDragInteractor to move the object.
     */
    public void createBoundedDraggableFigure() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create the interactor and set it up for a 200x200 rectangle
        Rectangle2D bounds = new Rectangle2D.Double(100.0, 100.0, 200.0, 200.0);
        Interactor boundedDragger = new BoundedDragInteractor(bounds);
        boundedDragger.setMouseFilter(MouseFilter.defaultFilter);


        // Create an outline rectangle that shows the boundaries
        graphicsPane.getOverlayLayer().add(bounds);


        // Create a green rectangle that stays inside the boundary
        BasicFigure green = new BasicFigure(new Rectangle2D.Double(110.0,
                110.0, 50.0, 50.0), Color.green);
        layer.add(green);
        green.setInteractor(boundedDragger);
    }

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     * test suites and simple demos -- in general, an application
     * will want to construct a more sophisticated set of layers.
     */
    public BasicCanvasPane() {
        super();
        addLayer(new FigureLayer());
    }

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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 an interactor to do the work.
        Interactor dragger = new DragInteractor();


        // Create the figure
        Figure one = new CloudFigure(10.0, 10.0, 80.0, 80.0);
        layer.add(one);
        one.setInteractor(dragger);


        Figure two = new CloudFigure(150, 150, 200, 180);
        layer.add(two);
        two.setInteractor(dragger);
    }

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    /** Create the figures that we will draw connectors between.
     * This is fairly uninteresting.
     */
    public void createFigures() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        figureA = new BasicRectangle(10.0, 10.0, 100.0, 50.0, Color.red);
        figureB = new BasicEllipse(100.0, 100.0, 100.0, 100.0, Color.green);
        figureC = new BasicEllipse(300.0, 100.0, 100.0, 100.0, Color.blue);


        layer.add(figureA);
        layer.add(figureB);
        layer.add(figureC);
    }

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     * Create the connectors between the two figures. We will firstly
     * create one StraightConnector with a circle and an arrowhead
     * on it, and then an ArcConnector.
     */
    public void createConnectors() {
        FigureLayer layer = graphicsPane.getForegroundLayer();


        // Create the target that finds sites on the figures
        target = new SelfPTarget();


        // Create the first connector. We don't care about the actual
        // location at this stage
        Site a = target.getTailSite(figureA, 0.0, 0.0);
        Site b = target.getHeadSite(figureB, 0.0, 0.0);
        connectorA = new StraightConnector(a, b);
        layer.add(connectorA);


        // Add an arrowhead to it
        Arrowhead arrow = new Arrowhead(b.getX(), b.getY(), b.getNormal());
        connectorA.setHeadEnd(arrow);


        // Create the second connector with an arrowhead
        a = target.getTailSite(figureB, 0.0, 0.0);
        b = target.getHeadSite(figureC, 0.0, 0.0);
        connectorB = new ArcConnector(a, b);
        layer.add(connectorB);
        arrow = new Arrowhead(b.getX(), b.getY(), b.getNormal());
        connectorB.setHeadEnd(arrow);


        // Create the third connector with an arrowhead
        a = target.getTailSite(figureB, 0.0, 0.0);
        b = target.getHeadSite(figureC, 0.0, 0.0);
        connectorC = new ArcConnector(a, b);


        // Swap the direction
        connectorC.setAngle(-connectorC.getAngle());
        layer.add(connectorC);
        arrow = new Arrowhead(b.getX(), b.getY(), b.getNormal());
        connectorC.setHeadEnd(arrow);


        // Create a fourth connector with an arrowhead, which is a "self-loop"
        a = target.getTailSite(figureB, 0.0, 0.0);
        b = target.getHeadSite(figureB, 0.0, 0.0);
        connectorD = new ArcConnector(a, b);
        connectorD.setSelfLoop(true);


        // Swap the direction
        // connectorD.setAngle(-connectorD.getAngle());
        // connectorD.setAngle(-0.1);
        layer.add(connectorD);
        arrow = new Arrowhead(b.getX(), b.getY(), b.getNormal());
        connectorD.setHeadEnd(arrow);
    }

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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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