Java 类org.eclipse.gef.handles.MoveHandleLocator 实例源码

@SuppressWarnings("unchecked")
@Override
protected List<Figure> createSelectionHandles() {
    List<Figure> list=super.createSelectionHandles();
    List<IFigure> figures=this.getHostFigure().getChildren();
    for(IFigure figure:figures){
        if(figure instanceof Label){
            list.add(new MoveHandle((GraphicalEditPart)this.getHost(),new MoveHandleLocator(figure)));
        }
    }
    return list;
}

/**
 * SequenceLineMoveHandle
 * @param owner
 */
public SequenceLineMoveHandle(GraphicalEditPart owner) {
    super(owner);
    if(owner.getFigure() instanceof LineFigure){
        setLocator(new MoveHandleLocator(((LineFigure)owner.getFigure()).getLine()));
    }
}

public SplitHandle(GraphicalEditPart owner, IFigure figure) {
    super(owner, new MoveHandleLocator(figure));
    figure.addFigureListener(new FigureListener() {
        @Override
        public void figureMoved(IFigure source) {
            revalidate();
        }
    });
}

@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
protected List createSelectionHandles() {
    List handles = super.createSelectionHandles();
    List<IFigure> children = (List<IFigure>) getHostFigure().getChildren();
    for (IFigure figure : children) {
        if (figure instanceof Label)
            handles.add(new MoveHandle((GraphicalEditPart) getHost(),
                    new MoveHandleLocator(figure)));
    }
    return handles;
}

public BandMoveHandle(GraphicalEditPart owner) {
    this(owner, new MoveHandleLocator(owner.getFigure()));
}

public TextOverlay() {
    super((GraphicalEditPart) getHost(), new MoveHandleLocator(getHostFigure()) {

        @Override
        public void relocate(IFigure target) {
            if (!getHostFigure().isShowing() 
                    || nodeText == null || nodeText.length() == 0) {
                super.relocate(target);
                return;
            }

            Rectangle figureBounds;
            if (getReference() instanceof HandleBounds) {
                figureBounds = ((HandleBounds)getReference()).getHandleBounds();
            } else {
                figureBounds = getReference().getBounds();
            }
            figureBounds = new Rectangle(figureBounds.getResized(-1, -1));

            int xInset = 3;
            switch (getDesiredAlignment()) {
            case TRUNCATE:
                figureBounds.x += xInset;
                figureBounds.width = figureBounds.width - 2*xInset;
                break;
            case LEFT:
                figureBounds.x += xInset;
                figureBounds.width = textSize.width + 2*xInset;
                break;
            case CENTER:
                figureBounds.x = figureBounds.x + figureBounds.width/2 - textSize.width/2;
                figureBounds.width = textSize.width + 2*xInset;
                break;
            case RIGHT:
                figureBounds.x = figureBounds.x + figureBounds.width - textSize.width - xInset;
                figureBounds.width = textSize.width + 2*xInset;
                break;
            case TRAILING:
                figureBounds.x = figureBounds.x + figureBounds.width + xInset;
                figureBounds.width = textSize.width + 2*xInset;
                break;
            }
            figureBounds.y = figureBounds.y + figureBounds.height/2 - textSize.height/2;

            Insets insets = target.getInsets();
            figureBounds.translate(-insets.left, -insets.top);
            figureBounds.resize(insets.getWidth() + 1, insets.getHeight() + 1);
            if (!CommonUtils.equals(target.getBounds(), figureBounds)) {
                target.setBounds(figureBounds);
            }
        }

    });
}