defaultgraphbubbleactivityrenderer.java

jawe的最新版本,基于Java的图形化工作流编辑器。图形化工作流编辑器 。使用JAVA语言开发

package org.enhydra.jawe.components.graph;

import java.awt.BasicStroke;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import org.jgraph.graph.GraphConstants;
import org.jgraph.graph.VertexRenderer;
import org.jgraph.graph.VertexView;

/**
 * Class used to display end object.
 */
public class DefaultGraphBubbleActivityRenderer extends VertexRenderer implements GraphActivityRendererInterface {

	private BasicStroke borderStroke = new BasicStroke(1);

	/**
	 * Paints End. Overrides super class paint
	 * to add specific painting.
	 */
	public void paint(Graphics g) {
		if (((GraphBubbleActivityInterface) view.getCell()).isStart())
         setIcon(GraphUtilities.getGraphController().getGraphSettings().getBubbleStartIcon());			
		else
         setIcon(GraphUtilities.getGraphController().getGraphSettings().getBubbleEndIcon());
		setText(null);

		int b = borderWidth;
		Graphics2D g2 = (Graphics2D) g;
		Object AntiAlias = RenderingHints.VALUE_ANTIALIAS_ON;//Harald Meister
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);//Harald Meister
		Dimension d = getSize();
		boolean tmp = selected;

		if (super.isOpaque()) {
			g.setColor(GraphUtilities.getGraphController().getGraphSettings().getBubbleColor());
			g.fillOval(b - 1, b - 1, d.height - b, d.height - b);
		}
		try {
			setBorder(null);
			setOpaque(false);
			selected = false;
			super.paint(g);
		} finally {
			selected = tmp;
		}

		g.setColor(GraphUtilities.getGraphController().getGraphSettings().getBubbleConectionColor());
		g2.setStroke(borderStroke);
		g.drawOval(b - 1, b - 1, d.height - b, d.height - b);

		if (selected) {
			g2.setStroke(GraphConstants.SELECTION_STROKE);
			g.setColor(graph.getHighlightColor());
			g.drawOval(b - 1, b - 1, d.height - b, d.height - b);
		}
	}

	public Point2D getPerimeterPoint(VertexView pView, Point2D p) {
		Rectangle2D bounds = pView.getBounds();
		double x = bounds.getX();
		double y = bounds.getY();
		double width = bounds.getWidth();
		double height = bounds.getHeight();
		double xCenter = x + width / 2;
		double yCenter = y + height / 2;
		double dx = p.getX() - xCenter; // Compute Angle
		double dy = p.getY() - yCenter;
		double alpha = Math.atan2(dy, dx);
		double xout = 0, yout = 0;
		double pi = Math.PI;
		double pi2 = Math.PI / 2.0;
		double beta = pi2 - alpha;
		double t = Math.atan2(height, width);
		if (alpha < -pi + t || alpha > pi - t) { // Left edge
			xout = x;
			yout = yCenter - width * Math.tan(alpha) / 2;
		} else if (alpha < -t) { // Top Edge
			yout = y;
			xout = xCenter - height * Math.tan(beta) / 2;
		} else if (alpha < t) { // Right Edge
			xout = x + width;
			yout = yCenter + width * Math.tan(alpha) / 2;
		} else { // Bottom Edge
			yout = y + height;
			xout = xCenter + height * Math.tan(beta) / 2;
		}
		return new Point2D.Double(xout, yout);
	}
}