Java Code Examples for edu.uci.ics.jung.algorithms.layout.Layout#transform()

/**
 * Paint <code>v</code>'s icon on <code>g</code> at <code>(x,y)</code>.
 */
protected void paintIconForVertex(RenderContext<V, E> rc, V v, Layout<V, E> layout) {
	GraphicsDecorator g = rc.getGraphicsContext();
	boolean vertexHit = true;
	// get the shape to be rendered
	Shape shape = rc.getVertexShapeTransformer().transform(v);

	Point2D p = layout.transform(v);
	p = rc.getMultiLayerTransformer().transform(Layer.LAYOUT, p);
	float x = (float) p.getX();
	float y = (float) p.getY();
	// create a transform that translates to the location of
	// the vertex to be rendered
	AffineTransform xform = AffineTransform.getTranslateInstance(x, y);
	// transform the vertex shape with xtransform
	shape = xform.createTransformedShape(shape);

	vertexHit = vertexHit(rc, shape);
	// rc.getViewTransformer().transform(shape).intersects(deviceRectangle);

	if (vertexHit) {
		if (rc.getVertexIconTransformer() != null) {
			Icon icon = rc.getVertexIconTransformer().transform(v);
			if (icon != null) {

				g.draw(icon, rc.getScreenDevice(), shape, (int) x, (int) y);

			} else {
				paintShapeForVertex(rc, v, shape);
			}
		} else {
			paintShapeForVertex(rc, v, shape);
		}
	}
}
 

/**
 * If the mouse is over a picked vertex, drag all picked vertices with the mouse. If the mouse
 * is not over a Vertex, draw the rectangle to select multiple Vertices
 *
 */
@Override
@SuppressWarnings("unchecked")
public void mouseDragged(MouseEvent e) {
	if (locked == false) {
		VisualizationViewer<V, E> vv = (VisualizationViewer<V, E>) e.getSource();
		if (vertex != null) {
			Point p = e.getPoint();
			Point2D graphPoint = vv.getRenderContext().getMultiLayerTransformer().inverseTransform(p);
			Point2D graphDown = vv.getRenderContext().getMultiLayerTransformer().inverseTransform(down);
			Layout<V, E> layout = vv.getGraphLayout();
			double dx = graphPoint.getX() - graphDown.getX();
			double dy = graphPoint.getY() - graphDown.getY();
			PickedState<V> ps = vv.getPickedVertexState();

			for (V v : ps.getPicked()) {
				Point2D vp = layout.transform(v);
				vp.setLocation(vp.getX() + dx, vp.getY() + dy);
				layout.setLocation(v, vp);
			}
			down = p;

		} else {
			if (rectangleSelectionEnabled) {
				Point2D out = e.getPoint();
				if (e.getModifiers() == this.addToSelectionModifiers || e.getModifiers() == modifiers) {
					rect.setFrameFromDiagonal(down, out);
				}
			}
		}
		if (vertex != null) {
			e.consume();
		}
		vv.repaint();
	}
}
 

public void paintIconForVertex(RenderContext<V,E> rc, V v, Layout<V,E> layout) {
	
    Point2D p = layout.transform(v);
    p = rc.getMultiLayerTransformer().transform(Layer.LAYOUT, p);
    float x = (float)p.getX();
    float y = (float)p.getY();

    GraphicsDecorator g = rc.getGraphicsContext();
    boolean outlineImages = false;
    Transformer<V,Icon> vertexIconFunction = rc.getVertexIconTransformer();
    
    if(vertexIconFunction instanceof DemoVertexIconTransformer) {
        outlineImages = ((DemoVertexIconTransformer<V>)vertexIconFunction).isOutlineImages();
    }
    Icon icon = vertexIconFunction.transform(v);
    if(icon == null || outlineImages) {
        
        Shape s = AffineTransform.getTranslateInstance(x,y).
            createTransformedShape(rc.getVertexShapeTransformer().transform(v));
        paintShapeForVertex(rc, v, s);
    }
    if(icon != null) {
        int xLoc = (int) (x - icon.getIconWidth()/2);
        int yLoc = (int) (y - icon.getIconHeight()/2);
        icon.paintIcon(rc.getScreenDevice(), g.getDelegate(), xLoc, yLoc);
    }
}
 

@Override
public void labelEdge(RenderContext<V, E> rc, Layout<V, E> layout, E e, String label) {
	if (label == null || label.length() == 0) {
		return;
	}

	Graph<V, E> graph = layout.getGraph();
	// don't draw edge if either incident vertex is not drawn
	Pair<V> endpoints = graph.getEndpoints(e);
	V v1 = endpoints.getFirst();
	V v2 = endpoints.getSecond();
	if (!rc.getVertexIncludePredicate().evaluate(Context.<Graph<V, E>, V> getInstance(graph, v1))
			|| !rc.getVertexIncludePredicate().evaluate(Context.<Graph<V, E>, V> getInstance(graph, v2))) {
		return;
	}

	Point2D p1 = layout.transform(v1);
	Point2D p2 = layout.transform(v2);
	p1 = rc.getMultiLayerTransformer().transform(Layer.LAYOUT, p1);
	p2 = rc.getMultiLayerTransformer().transform(Layer.LAYOUT, p2);
	float x1 = (float) p1.getX();
	float y1 = (float) p1.getY();
	float x2 = (float) p2.getX();
	float y2 = (float) p2.getY();

	GraphicsDecorator g = rc.getGraphicsContext();
	float distX = x2 - x1;
	float distY = y2 - y1;
	double totalLength = Math.sqrt(distX * distX + distY * distY);

	double closeness = rc.getEdgeLabelClosenessTransformer().transform(Context.<Graph<V, E>, E> getInstance(graph, e))
			.doubleValue();

	int posX = (int) (x1 + closeness * distX);
	int posY = (int) (y1 + closeness * distY);

	int xDisplacement = 0;
	int yDisplacement = 0;

	xDisplacement = (int) (rc.getLabelOffset() * (distX / totalLength));
	yDisplacement = (int) (rc.getLabelOffset() * (-distY / totalLength));

	AffineTransform old = g.getTransform();
	AffineTransform xform = new AffineTransform(old);
	xform.translate(posX + xDisplacement, posY + yDisplacement);

	double parallelOffset = 0.0d;
	Component component = prepareRenderer(rc, rc.getEdgeLabelRenderer(), label, rc.getPickedEdgeState().isPicked(e), e);
	Dimension d = component.getPreferredSize();
	xform.translate(-d.width / 2.0d, -(d.height / 2.0d - parallelOffset));
	g.setTransform(xform);
	g.setColor(Colors.WHITE);
	g.draw(component, rc.getRendererPane(), 0, 0, d.width, d.height, true);
	g.setTransform(old);
}
 

/**
 * Labels the specified vertex with the specified label. Uses the font specified by this
 * instance's <code>VertexFontFunction</code>. (If the font is unspecified, the existing font
 * for the graphics context is used.) If vertex label centering is active, the label is centered
 * on the position of the vertex; otherwise the label is offset slightly.
 */
@Override
public void labelVertex(RenderContext<V, E> rc, Layout<V, E> layout, V v, String label) {
	Graph<V, E> graph = layout.getGraph();
	if (rc.getVertexIncludePredicate().evaluate(Context.<Graph<V, E>, V> getInstance(graph, v)) == false) {
		return;
	}
	Point2D pt = layout.transform(v);
	pt = rc.getMultiLayerTransformer().transform(Layer.LAYOUT, pt);

	float x = (float) pt.getX();
	float y = (float) pt.getY();

	Component component = prepareRenderer(rc, rc.getVertexLabelRenderer(), label, rc.getPickedVertexState().isPicked(v),
			v);
	GraphicsDecorator g = rc.getGraphicsContext();
	Dimension d = component.getPreferredSize();
	AffineTransform xform = AffineTransform.getTranslateInstance(x, y);

	Shape shape = rc.getVertexShapeTransformer().transform(v);
	shape = xform.createTransformedShape(shape);
	if (rc.getGraphicsContext() instanceof TransformingGraphics) {
		BidirectionalTransformer transformer = ((TransformingGraphics) rc.getGraphicsContext()).getTransformer();
		if (transformer instanceof ShapeTransformer) {
			ShapeTransformer shapeTransformer = (ShapeTransformer) transformer;
			shape = shapeTransformer.transform(shape);
		}
	}
	Rectangle2D bounds = shape.getBounds2D();

	Point p = null;
	if (position == Position.AUTO) {
		Dimension vvd = rc.getScreenDevice().getSize();
		if (vvd.width == 0 || vvd.height == 0) {
			vvd = rc.getScreenDevice().getPreferredSize();
		}
		p = getAnchorPoint(bounds, d, positioner.getPosition(x, y, vvd));
	} else {
		p = getAnchorPoint(bounds, d, position);
	}

	if (graphCreator.isLeaf((String) v) && !graphCreator.getModel().getRoot().isNumerical()) {
		// shift the label if there is a frequency bar
		p.setLocation(p.x, p.y + LEAF_LABEL_OFFSET_Y);
	}
	g.draw(component, rc.getRendererPane(), p.x, p.y, d.width, d.height, true);
}