= Draw2d =

The Draw2D is part of the DWT-Addons.
Draw2D originates to the [http://www.eclipse.org/gef Eclipse GEF project].

The source code for this example is less than 200 lines to draw this UML diagram. The original source of this example can be found [http://www.eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html here]:

Draw2D on Linux-GTK [[br]]
[[Image(http://downloads.dsource.org/projects/dwt/screenshots/linux/draw2d/UmlExample.png)]]

Draw2D on Windows [[br]]
[[Image(http://downloads.dsource.org/projects/dwt/screenshots/win/draw2d/UmlExample.png)]]

{{{
#!d
/++
 + Original sources from http://www.eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html
 + Ported to the D programming language
 +     Frank Benoit <benoit@tionex.de>
 +/

module umlexample.UmlExample;

import dwt.dwthelper.utils;
import dwt.dwthelper.ByteArrayInputStream;

import dwtx.draw2d.Figure;
import dwtx.draw2d.IFigure;
import dwtx.draw2d.geometry.PointList;
import dwtx.draw2d.geometry.Rectangle;
import dwtx.draw2d.geometry.Insets;
import dwt.DWT;
import dwt.graphics.Font;
import dwt.graphics.Image;
import dwt.graphics.ImageData;
import dwt.widgets.Display;
import dwt.widgets.Shell;
import dwtx.draw2d.AbstractBorder;
import dwtx.draw2d.Graphics;
import dwt.graphics.Color;
import dwtx.draw2d.Label;
import dwtx.draw2d.ToolbarLayout;
import dwtx.draw2d.LineBorder;
import dwtx.draw2d.ConnectionEndpointLocator;
import dwtx.draw2d.ChopboxAnchor;
import dwtx.draw2d.PolygonDecoration;
import dwtx.draw2d.PolylineConnection;
import dwtx.draw2d.ColorConstants;
import dwtx.draw2d.LightweightSystem;
import dwtx.draw2d.XYLayout;

version(JIVE) import jive.stacktrace;

public class CompartmentFigure : Figure {

    public this() {
        ToolbarLayout layout = new ToolbarLayout();
        layout.setMinorAlignment(ToolbarLayout.ALIGN_TOPLEFT);
        layout.setStretchMinorAxis(false);
        layout.setSpacing(2);
        setLayoutManager(layout);
        setBorder(new CompartmentFigureBorder());
    }

    public class CompartmentFigureBorder : AbstractBorder {
        public Insets getInsets(IFigure figure) {
            return new Insets(1,0,0,0);
        }
        public void paint(IFigure figure, Graphics graphics, Insets insets) {
            graphics.drawLine(getPaintRectangle(figure, insets).getTopLeft(),
                    tempRect.getTopRight());
        }
    }
}

public class UMLClassFigure : Figure {
    public static Color classColor;
    static this(){
        classColor = new Color(null,255,255,206);
    }

    private CompartmentFigure attributeFigure;
    private CompartmentFigure methodFigure;

    public this(Label name) {

        attributeFigure = new CompartmentFigure();
        methodFigure = new CompartmentFigure();

        ToolbarLayout layout = new ToolbarLayout();
        setLayoutManager(layout);
        setBorder(new LineBorder(ColorConstants.black,1));
        setBackgroundColor(classColor);
        setOpaque(true);

        add(name);
        add(attributeFigure);
        add(methodFigure);
    }
    public CompartmentFigure getAttributesCompartment() {
        return attributeFigure;
    }
    public CompartmentFigure getMethodsCompartment() {
        return methodFigure;
    }
}

static void[] imgDataClass = import("draw2d.umlexample.class.gif");
static void[] imgDataMethod = import("draw2d.umlexample.method.gif");
static void[] imgDataField = import("draw2d.umlexample.field.gif");

Image getImage( Display disp, void[] data ){
    ImageData imageData = new ImageData( new ByteArrayInputStream( cast(byte[]) data ));
    return new Image( disp, imageData );
}

/**
 * A test class to display a UMLFigure
 */
public static void main(){
    Display d = Display.getCurrent();
    final Shell shell = new Shell(d);
    shell.setSize(400, 400);
    shell.setText("UMLClassFigure Test");
    LightweightSystem lws = new LightweightSystem(shell);
    Figure contents = new Figure();
    XYLayout contentsLayout = new XYLayout();
    contents.setLayoutManager(contentsLayout);

    Font classFont = new Font(null, "Arial", 12, DWT.BOLD);
    Label classLabel1 = new Label("Table", getImage(d, imgDataClass));
    classLabel1.setFont(classFont);

    Label classLabel2 = new Label("Column", getImage(d, imgDataClass));
    classLabel2.setFont(classFont);

    final UMLClassFigure classFigure = new UMLClassFigure(classLabel1);
    final UMLClassFigure classFigure2 = new UMLClassFigure(classLabel2);

    Label attribute1 = new Label("columns: Column[]", getImage(d, imgDataField));
    Label attribute2 = new Label("rows: Row[]", getImage(d, imgDataField));
    Label attribute3 = new Label("columnID: int", getImage(d, imgDataField));
    Label attribute4 = new Label("items: List", getImage(d, imgDataField));

    classFigure.getAttributesCompartment().add(attribute1);
    classFigure.getAttributesCompartment().add(attribute2);
    classFigure2.getAttributesCompartment().add(attribute3);
    classFigure2.getAttributesCompartment().add(attribute4);

    Label method1 = new Label("getColumns(): Column[]", getImage(d, imgDataMethod));
    Label method2 = new Label("getRows(): Row[]", getImage(d, imgDataMethod));
    Label method3 = new Label("getColumnID(): int", getImage(d, imgDataMethod));
    Label method4 = new Label("getItems(): List", getImage(d, imgDataMethod));

    classFigure.getMethodsCompartment().add(method1);
    classFigure.getMethodsCompartment().add(method2);
    classFigure2.getMethodsCompartment().add(method3);
    classFigure2.getMethodsCompartment().add(method4);

    contentsLayout.setConstraint(classFigure, new Rectangle(10,10,-1,-1));
    contentsLayout.setConstraint(classFigure2, new Rectangle(200, 200, -1, -1));

    /* Creating the connection */
    PolylineConnection c = new PolylineConnection();
    ChopboxAnchor sourceAnchor = new ChopboxAnchor(classFigure);
    ChopboxAnchor targetAnchor = new ChopboxAnchor(classFigure2);
    c.setSourceAnchor(sourceAnchor);
    c.setTargetAnchor(targetAnchor);

    /* Creating the decoration */
    PolygonDecoration decoration = new PolygonDecoration();
    PointList decorationPointList = new PointList();
    decorationPointList.addPoint(0,0);
    decorationPointList.addPoint(-2,2);
    decorationPointList.addPoint(-4,0);
    decorationPointList.addPoint(-2,-2);
    decoration.setTemplate(decorationPointList);
    c.setSourceDecoration(decoration);

    /* Adding labels to the connection */
    ConnectionEndpointLocator targetEndpointLocator =
        new ConnectionEndpointLocator(c, true);
    targetEndpointLocator.setVDistance(15);
    Label targetMultiplicityLabel = new Label("1..*");
    c.add(targetMultiplicityLabel, targetEndpointLocator);

    ConnectionEndpointLocator sourceEndpointLocator =
        new ConnectionEndpointLocator(c, false);
    sourceEndpointLocator.setVDistance(15);
    Label sourceMultiplicityLabel = new Label("1");
    c.add(sourceMultiplicityLabel, sourceEndpointLocator);

    ConnectionEndpointLocator relationshipLocator =
        new ConnectionEndpointLocator(c,true);
    relationshipLocator.setUDistance(10);
    relationshipLocator.setVDistance(-20);
    Label relationshipLabel = new Label("contains");
    c.add(relationshipLabel,relationshipLocator);

    contents.add(classFigure);
    contents.add(classFigure2);
    contents.add(c);

    lws.setContents(contents);
    shell.open();
    while (!shell.isDisposed())
        while (!d.readAndDispatch())
            d.sleep();
}
}}}