ProblemB3-code1.html

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<pre class="prettyprint linenums lang-java">
public abstract class AbstractTool extends AbstractBean implements Tool {
    protected Point anchor;
}

public class SelectionTool extends AbstractTool {
    private Tool tracker;
    private DragTracker dragTracker;

    public void mousePressed(MouseEvent evt) {
        DrawingView view;
        Figure figure;
        figure = view.findFigure(anchor);
        <a href="#getDragTracker" name="rgetDragTracker">getDragTracker(figure)</a>;
        tracker.<a href="#mousePressed" name="rmousePressed">mousePressed(evt)</a>;
    }

    protected DragTracker <a name="getDragTracker">getDragTracker(Figure f)</a> {
        dragTracker.<a href="#setDraggedFigure" name="rsetDraggedFigure">setDraggedFigure(f)</a>;
    } <a href="#rgetDragTracker">//return to the caller</a>
}

public class DefaultDragTracker extends AbstractTool implements DragTracker {
    protected Figure anchorFigure;

    public void <a name="mousePressed">mousePressed(MouseEvent evt)</a> {
        DrawingView view;
        view.<a href="#addToSelection" name="raddToSelection">addToSelection(anchorFigure)</a>;
    } <a href="#rmousePressed">//return to the caller</a>

    public void <a name="setDraggedFigure">setDraggedFigure(Figure f)</a> {
        anchorFigure = f;
    } <a href="#rsetDraggedFigure">//return to the caller</a>
}
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<pre class="prettyprint linenums lang-java">
public class DefaultDrawingView
        extends JComponeen
        implements DrawingView, EditableComponent {
    private Set&lt;Figure&gt; selectedFigures;

    public void <a name="addToSelection">addToSelection(Figure figure)</a> {
        selectedFigures.add(figure);
    } <a href="#raddToSelection">//return to the caller</a>
}
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