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/*
* Copyright (c) 2005, David Benson
*
* See LICENSE file in distribution for licensing details of this source file
*/
package com.jgraph.example.fastgraph;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import org.jgraph.graph.CellView;
import org.jgraph.graph.EdgeView;
import org.jgraph.graph.GraphConstants;
import org.jgraph.plaf.basic.BasicGraphUI;
public class FastGraphUI extends BasicGraphUI {
/**
* Paints the renderer of <code>view</code> to <code>g</code> at
* <code>bounds</code>. Recursive implementation that paints the children
* first.
* <p>
* The reciever should NOT modify <code>clipBounds</code>, or
* <code>insets</code>. The <code>preview</code> flag is passed to the
* renderer, and is not used here.
*/
public void paintCell(Graphics g, CellView view, Rectangle2D bounds,
boolean preview) {
if (view != null && view instanceof FastEdgeView) {
// First Paint View
if (bounds != null) {
boolean selected = graph.isCellSelected(view.getCell());
Graphics2D g2 = (Graphics2D) g;
Stroke stroke = g2.getStroke();
Object rendererHint = g2
.getRenderingHint(RenderingHints.KEY_STROKE_CONTROL);
g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL,
RenderingHints.VALUE_STROKE_PURE);
int c = BasicStroke.CAP_BUTT;
int j = BasicStroke.JOIN_MITER;
float lineWidth = 1.0f;
g2.setStroke(new BasicStroke(lineWidth, c, j));
// TODO
g2.setColor(Color.BLACK);//(getForeground());
int n = ((EdgeView)view).getPointCount();
Point2D lastPoint = null;
for (int i = 0; i < n; i++) {
Point2D currentPoint = ((EdgeView) view).getPoint(i);
if (i != 0) {
g2.drawLine((int) lastPoint.getX(), (int) lastPoint.getY(),
(int) currentPoint.getX(),
(int) currentPoint.getY());
}
lastPoint = currentPoint;
}
if (selected) { // Paint Selected
g2.setStroke(GraphConstants.SELECTION_STROKE);
g2.setColor(graph.getHighlightColor());
for (int i = 0; i < n; i++) {
Point2D currentPoint = ((EdgeView) view).getPoint(i);
if (i != 0) {
g2.drawLine((int) lastPoint.getX(), (int) lastPoint.getY(),
(int) currentPoint.getX(),
(int) currentPoint.getY());
}
lastPoint = currentPoint;
}
}
g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, rendererHint);
g2.setStroke(stroke);
}
} else {
super.paintCell(g, view, bounds, preview);
}
}
/**
* Updates the <code>preferredSize</code> instance variable, which is
* returned from <code>getPreferredSize()</code>. Ignores edges for
* performance
*/
protected void updateCachedPreferredSize() {
CellView[] views = graphLayoutCache.getRoots();
Rectangle2D size = null;
if (views != null && views.length > 0) {
for (int i = 0; i < views.length; i++) {
if (views[i] != null && !(views[i] instanceof FastEdgeView)) {
Rectangle2D r = views[i].getBounds();
if (r != null) {
if (size == null)
size = new Rectangle2D.Double(r.getX(), r.getY(), r
.getWidth(), r.getHeight());
else
Rectangle2D.union(size, r, size);
}
}
}
}
if (size == null)
size = new Rectangle2D.Double();
Point2D psize = new Point2D.Double(size.getX() + size.getWidth(), size
.getY()
+ size.getHeight());
Dimension d = graph.getMinimumSize();
Point2D min = (d != null) ? graph
.toScreen(new Point(d.width, d.height)) : new Point(0, 0);
Point2D scaled = graph.toScreen(psize);
preferredSize = new Dimension(
(int) Math.max(min.getX(), scaled.getX()), (int) Math.max(min
.getY(), scaled.getY()));
Insets in = graph.getInsets();
if (in != null) {
preferredSize.setSize(
preferredSize.getWidth() + in.left + in.right,
preferredSize.getHeight() + in.top + in.bottom);
}
validCachedPreferredSize = true;
}
}
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