Examples of JCanvas

diva.canvas.JCanvas
The JCanvas class is the center-piece of this package. The canvas is composed of a canvas pane, which in turn is composed of one or more layers. Each layer may contain arbitrary graphics, although commonly at least one layer is an instance of a "figure layer" class that contains figure objects. The main role of the JCanvas class is to provide the physical screen space on which layers draw themselves, and to interface to the Swing component hierarchy.
This architecture allows a graphics developer to write code for a pane and a set of layers, without being concerned about whether the pane and its layers will be directly contained by a JCanvas or within some other layer. For example, it will be possible for a visualization component to be "embedded" in a larger component. @version $Id: JCanvas.java,v 1.27 2005/07/08 19:54:46 cxh Exp $ @author John Reekie @Pt.AcceptedRating Yellow

Examples of diva.canvas.JCanvas


        GraphicsPane pane = new GraphicsPane();
        _layer = pane.getForegroundLayer();
        _overlayLayer = new OverlayLayer();


        _canvas = new JCanvas(pane);


        _container.add("Center", _canvas);
        _canvas.setMinimumSize(new Dimension(horizontalDimension,
                verticalDimension));
        _canvas.setMaximumSize(new Dimension(horizontalDimension,

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Examples of diva.canvas.JCanvas

    /** Zoom in or out to magnify by the specified factor, from the current
     *  magnification.
     *  @param factor The magnification factor (relative to 1.0).
     */
    public void zoom(double factor) {
        JCanvas canvas = getJGraph().getGraphPane().getCanvas();
        AffineTransform current = canvas.getCanvasPane().getTransformContext()
                .getTransform();


        // Save the center, so we remember what we were looking at.
        Point2D center = getCenter();
        current.scale(factor, factor);
        canvas.getCanvasPane().setTransform(current);


        // Reset the center.
        setCenter(center);


        if (_graphPanner != null) {

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Examples of diva.canvas.JCanvas

        }


        Rectangle2D viewSize = getVisibleRectangle();
        AffineTransform newTransform = CanvasUtilities.computeFitTransform(
                bounds, viewSize);
        JCanvas canvas = pane.getCanvas();
        canvas.getCanvasPane().setTransform(newTransform);


        if (_graphPanner != null) {
            _graphPanner.repaint();
        }
    }

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Examples of diva.canvas.JCanvas

    }


    /** Set zoom to the nominal.
     */
    public void zoomReset() {
        JCanvas canvas = getJGraph().getGraphPane().getCanvas();
        AffineTransform current = canvas.getCanvasPane().getTransformContext()
                .getTransform();
        current.setToIdentity();
        canvas.getCanvasPane().setTransform(current);


        if (_graphPanner != null) {
            _graphPanner.repaint();
        }
    }

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Examples of diva.canvas.JCanvas

            }


            size.recordSize(_getRightComponent());


            // Also record zoom and pan state.
            JCanvas canvas = getJGraph().getGraphPane().getCanvas();
            AffineTransform current = canvas.getCanvasPane()
                    .getTransformContext().getTransform();


            // We assume the scaling in the X and Y directions are the same.
            double scale = current.getScaleX();
            Parameter zoom = (Parameter) getModel().getAttribute(

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Examples of diva.canvas.JCanvas


    /** Set zoom to the nominal.  This overrides the base class to set
     *  a zoom factor and center more appropriate for editing icons.
     */
    public void zoomReset() {
        JCanvas canvas = getJGraph().getGraphPane().getCanvas();
        AffineTransform current = canvas.getCanvasPane().getTransformContext()
                .getTransform();
        current.setToScale(_ZOOM_SCALE, _ZOOM_SCALE);
        canvas.getCanvasPane().setTransform(current);
        setCenter(new Point2D.Double(0.0, 0.0));


        if (_graphPanner != null) {
            _graphPanner.repaint();
        }

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Examples of diva.canvas.JCanvas

                            _PADDING, size.getWidth() - 2 * _PADDING, size
                                    .getHeight()
                                    - 2 * _PADDING);
                    AffineTransform newTransform = CanvasUtilities
                            .computeFitTransform(bounds, viewSize);
                    JCanvas canvas = graphPane.getCanvas();
                    canvas.getCanvasPane().setTransform(newTransform);
                }
            }
        };
        SwingUtilities.invokeLater(defer);
    }

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Examples of diva.canvas.JCanvas

    Interactor defaultInteractor;


    /** Create a JCanvas and put it into a window
     */
    public LabelTutorial() {
        canvas = new JCanvas();
        graphicsPane = (GraphicsPane) canvas.getCanvasPane();


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

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Examples of diva.canvas.JCanvas

    private GraphicsPane graphicsPane;


    /** Create a JCanvas and put it into a window.
     */
    public VectorFigureTutorial() {
        canvas = new JCanvas();
        graphicsPane = (GraphicsPane) canvas.getCanvasPane();
        createFigures();


        new BasicFrame("Vector figure tutorial", canvas);
    }

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Examples of diva.canvas.JCanvas

    private GraphicsPane graphicsPane;


    /** Create a JCanvas and put it into a window.
     */
    public FigureTutorial() {
        canvas = new JCanvas();
        graphicsPane = (GraphicsPane) canvas.getCanvasPane();
        createFigures();


        new BasicFrame("Figure tutorial", canvas);
    }

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