Java 1.2 How-To

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Text File | 1997-10-28 | 21.4 KB | 2,010 lines

<string> Graph Layout <string> Min-Kyu Lee <integer> 0 <string> <string> <integer> 3 <string> java.util.* <string> java.awt.* <string> java.applet.Applet <storable> <string> TGraph <integer> 14 <storable> <string> TJavaClass <integer> 62 <integer> 147 <integer> 172 <integer> 277 <string> Node <integer> 6 <storable> <string> TJavaAttribute <string> x <string> double <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> y <string> double <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> dx <string> double <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> dy <string> double <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> fixed <string> boolean <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> lbl <string> String <string> <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <integer> 0 <boolean> FALSE <boolean> TRUE <integer> 0 <storable> <string> TJavaClass <integer> 202 <integer> 147 <integer> 312 <integer> 227 <string> Edge <integer> 3 <storable> <string> TJavaAttribute <string> from <string> int <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> to <string> int <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> len <string> double <string> <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <integer> 0 <boolean> FALSE <boolean> TRUE <integer> 0 <storable> <string> TJavaClass <integer> 402 <integer> 32 <integer> 512 <integer> 67 <string> Panel <integer> 0 <integer> 0 <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <storable> <string> TJavaClass <integer> 412 <integer> 197 <integer> 697 <integer> 377 <string> GraphPanel <integer> 17 <storable> <string> TJavaAttribute <string> nnodes <string> int <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> nedges <string> int <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> stress <string> boolean <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> random <string> boolean <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> pick <string> Node <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> pickfixed <string> boolean <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> offscreen <string> Image <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> offscreensize <string> Dimension <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> offgraphics <string> Graphics <string> <integer> 0 <boolean> FALSE <boolean> FALSE <storable> <string> TJavaAttribute <string> fixedColor <string> Color <string> Color.red <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> selectColor <string> Color <string> Color.pink <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> edgeColor <string> Color <string> Color.black <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> nodeColor <string> Color <string> new Color(250, 220, 100) <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> stressColor <string> Color <string> Color.darkGray <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> arcColor1 <string> Color <string> Color.black <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> arcColor2 <string> Color <string> Color.pink <integer> 0 <boolean> TRUE <boolean> FALSE <storable> <string> TJavaAttribute <string> arcColor3 <string> Color <string> Color.red <integer> 0 <boolean> TRUE <boolean> FALSE <integer> 13 <storable> <string> TJavaConstructor <string> <string> <integer> 1 <storable> <string> TJavaArgument <string> graph <string> Graph <integer> 1 <string> this.graph = graph; <storable> <string> TJavaMethod <string> findNode <string> int <integer> 1 <storable> <string> TJavaArgument <string> lbl <string> String <integer> 0 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 6 <string> for (int i = 0 ; i < nnodes ; i++) { <string> if (nodes[i].lbl.equals(lbl)) { <string> return i; <string> } <string> } <string> return addNode(lbl); <storable> <string> TJavaMethod <string> addNode <string> int <integer> 1 <storable> <string> TJavaArgument <string> lbl <string> String <integer> 0 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 6 <string> Node n = new Node(); <string> n.x = 10 + 380*Math.random(); <string> n.y = 10 + 380*Math.random(); <string> n.lbl = lbl; <string> nodes[nnodes] = n; <string> return nnodes++; <storable> <string> TJavaMethod <string> addEdge <string> <integer> 3 <storable> <string> TJavaArgument <string> from <string> String <storable> <string> TJavaArgument <string> to <string> String <storable> <string> TJavaArgument <string> len <string> int <integer> 0 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 5 <string> Edge e = new Edge(); <string> e.from = findNode(from); <string> e.to = findNode(to); <string> e.len = len; <string> edges[nedges++] = e; <storable> <string> TJavaMethod <string> run <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 16 <string> while (true) { <string> relax(); <string> if (random && (Math.random() < 0.03)) { <string> Node n = nodes[(int)(Math.random() * nnodes)]; <string> if (!n.fixed) { <string> n.x += 100*Math.random() - 50; <string> n.y += 100*Math.random() - 50; <string> } <string> graph.play(graph.getCodeBase(), "audio/drip.au"); <string> } <string> try { <string> Thread.sleep(100); <string> } catch (InterruptedException e) { <string> break; <string> } <string> } <storable> <string> TJavaMethod <string> relax <string> <integer> 0 <integer> 0 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> TRUE <string> <integer> 66 <string> for (int i = 0 ; i < nedges ; i++) { <string> Edge e = edges[i]; <string> double vx = nodes[e.to].x - nodes[e.from].x; <string> double vy = nodes[e.to].y - nodes[e.from].y; <string> double len = Math.sqrt(vx * vx + vy * vy); <string> double f = (edges[i].len - len) / (len * 3); <string> double dx = f * vx; <string> double dy = f * vy; <string> <string> nodes[e.to].dx += dx; <string> nodes[e.to].dy += dy; <string> nodes[e.from].dx += -dx; <string> nodes[e.from].dy += -dy; <string> } <string> <string> for (int i = 0 ; i < nnodes ; i++) { <string> Node n1 = nodes[i]; <string> double dx = 0; <string> double dy = 0; <string> <string> for (int j = 0 ; j < nnodes ; j++) { <string> if (i == j) { <string> continue; <string> } <string> Node n2 = nodes[j]; <string> double vx = n1.x - n2.x; <string> double vy = n1.y - n2.y; <string> double len = vx * vx + vy * vy; <string> if (len == 0) { <string> dx += Math.random(); <string> dy += Math.random(); <string> } else if (len < 100*100) { <string> dx += vx / len; <string> dy += vy / len; <string> } <string> } <string> double dlen = dx * dx + dy * dy; <string> if (dlen > 0) { <string> dlen = Math.sqrt(dlen) / 2; <string> n1.dx += dx / dlen; <string> n1.dy += dy / dlen; <string> } <string> } <string> <string> Dimension d = size(); <string> for (int i = 0 ; i < nnodes ; i++) { <string> Node n = nodes[i]; <string> if (!n.fixed) { <string> n.x += Math.max(-5, Math.min(5, n.dx)); <string> n.y += Math.max(-5, Math.min(5, n.dy)); <string> // System.out.println("v= " + n.dx + "," + n.dy); <string> if (n.x < 0) { <string> n.x = 0; <string> } else if (n.x > d.width) { <string> n.x = d.width; <string> } <string> if (n.y < 0) { <string> n.y = 0; <string> } else if (n.y > d.height) { <string> n.y = d.height; <string> } <string> } <string> n.dx /= 2; <string> n.dy /= 2; <string> } <string> repaint(); <storable> <string> TJavaMethod <string> paintNode <string> <integer> 3 <storable> <string> TJavaArgument <string> g <string> Graphics <storable> <string> TJavaArgument <string> n <string> Node <storable> <string> TJavaArgument <string> fm <string> FontMetrics <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 9 <string> int x = (int)n.x; <string> int y = (int)n.y; <string> g.setColor((n == pick) ? selectColor : (n.fixed ? fixedColor : nodeColor)); <string> int w = fm.stringWidth(n.lbl) + 10; <string> int h = fm.getHeight() + 4; <string> g.fillRect(x - w/2, y - h / 2, w, h); <string> g.setColor(Color.black); <string> g.drawRect(x - w/2, y - h / 2, w-1, h-1); <string> g.drawString(n.lbl, x - (w-10)/2, (y - (h-4)/2) + fm.getAscent()); <storable> <string> TJavaMethod <string> update <string> <integer> 1 <storable> <string> TJavaArgument <string> g <string> Graphics <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> TRUE <string> <integer> 33 <string> Dimension d = size(); <string> if ((offscreen == null) || (d.width != offscreensize.width) || (d.height != offscreensize.height)) { <string> offscreen = createImage(d.width, d.height); <string> offscreensize = d; <string> offgraphics = offscreen.getGraphics(); <string> offgraphics.setFont(getFont()); <string> } <string> <string> offgraphics.setColor(getBackground()); <string> offgraphics.fillRect(0, 0, d.width, d.height); <string> for (int i = 0 ; i < nedges ; i++) { <string> Edge e = edges[i]; <string> int x1 = (int)nodes[e.from].x; <string> int y1 = (int)nodes[e.from].y; <string> int x2 = (int)nodes[e.to].x; <string> int y2 = (int)nodes[e.to].y; <string> int len = (int)Math.abs(Math.sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)) - e.len); <string> offgraphics.setColor((len < 10) ? arcColor1 : (len < 20 ? arcColor2 : arcColor3)) ; <string> offgraphics.drawLine(x1, y1, x2, y2); <string> if (stress) { <string> String lbl = String.valueOf(len); <string> offgraphics.setColor(stressColor); <string> offgraphics.drawString(lbl, x1 + (x2-x1)/2, y1 + (y2-y1)/2); <string> offgraphics.setColor(edgeColor); <string> } <string> } <string> <string> FontMetrics fm = offgraphics.getFontMetrics(); <string> for (int i = 0 ; i < nnodes ; i++) { <string> paintNode(offgraphics, nodes[i], fm); <string> } <string> <string> g.drawImage(offscreen, 0, 0, null); <storable> <string> TJavaMethod <string> mouseDown <string> boolean <integer> 3 <storable> <string> TJavaArgument <string> evt <string> Event <storable> <string> TJavaArgument <string> x <string> int <storable> <string> TJavaArgument <string> y <string> int <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> TRUE <string> <integer> 15 <string> double bestdist = Double.MAX_VALUE; <string> for (int i = 0 ; i < nnodes ; i++) { <string> Node n = nodes[i]; <string> double dist = (n.x - x) * (n.x - x) + (n.y - y) * (n.y - y); <string> if (dist < bestdist) { <string> pick = n; <string> bestdist = dist; <string> } <string> } <string> pickfixed = pick.fixed; <string> pick.fixed = true; <string> pick.x = x; <string> pick.y = y; <string> repaint(); <string> return true; <storable> <string> TJavaMethod <string> mouseDrag <string> boolean <integer> 3 <storable> <string> TJavaArgument <string> evt <string> Event <storable> <string> TJavaArgument <string> x <string> int <storable> <string> TJavaArgument <string> y <string> int <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> TRUE <string> <integer> 4 <string> pick.x = x; <string> pick.y = y; <string> repaint(); <string> return true; <storable> <string> TJavaMethod <string> mouseUp <string> boolean <integer> 3 <storable> <string> TJavaArgument <string> evt <string> Event <storable> <string> TJavaArgument <string> x <string> int <storable> <string> TJavaArgument <string> y <string> int <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> TRUE <string> <integer> 6 <string> pick.x = x; <string> pick.y = y; <string> pick.fixed = pickfixed; <string> pick = null; <string> repaint(); <string> return true; <storable> <string> TJavaMethod <string> start <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 2 <string> relaxer = new Thread(this); <string> relaxer.start(); <storable> <string> TJavaMethod <string> stop <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 1 <string> relaxer.stop(); <integer> 0 <boolean> FALSE <boolean> TRUE <integer> 1 <storable> <string> TInheritance <integer> 447 <integer> 127 <integer> 467 <integer> 147 <storable> <string> TJavaInterface <integer> 582 <integer> 32 <integer> 692 <integer> 82 <string> Runnable <integer> 0 <integer> 1 <storable> <string> TJavaOperation <string> run <string> <integer> 0 <integer> 0 <boolean> FALSE <storable> <string> TInheritance <integer> 627 <integer> 127 <integer> 647 <integer> 147 <storable> <string> TJavaClass <integer> 412 <integer> 482 <integer> 632 <integer> 582 <string> Graph <integer> 0 <integer> 4 <storable> <string> TJavaMethod <string> init <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 31 <string> setLayout(new BorderLayout()); <string> panel = new GraphPanel(this); <string> add("Center", panel); <string> Panel p = new Panel(); <string> add("South", p); <string> p.add(new Button("Scramble")); <string> p.add(new Button("Shake")); <string> p.add(new Checkbox("Stress")); <string> p.add(new Checkbox("Random")); <string> String edges = getParameter("edges"); <string> for (StringTokenizer t = new StringTokenizer(edges, ",") ; t.hasMoreTokens() ; ) { <string> String str = t.nextToken(); <string> int i = str.indexOf('-'); <string> if (i > 0) { <string> int len = 50; <string> int j = str.indexOf('/'); <string> if (j > 0) { <string> len = Integer.valueOf(str.substring(j+1)).intValue(); <string> str = str.substring(0, j); <string> } <string> panel.addEdge(str.substring(0,i), str.substring(i+1), len); <string> } <string> } <string> Dimension d = size(); <string> String center = getParameter("center"); <string> if (center != null){ <string> Node n = panel.nodes[panel.findNode(center)]; <string> n.x = d.width / 2; <string> n.y = d.height / 2; <string> n.fixed = true; <string> } <storable> <string> TJavaMethod <string> start <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 1 <string> panel.start(); <storable> <string> TJavaMethod <string> stop <string> <integer> 0 <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 1 <string> panel.stop(); <storable> <string> TJavaMethod <string> action <string> boolean <integer> 2 <storable> <string> TJavaArgument <string> evt <string> Event <storable> <string> TJavaArgument <string> arg <string> Object <integer> 3 <boolean> FALSE <boolean> FALSE <boolean> FALSE <boolean> FALSE <string> <integer> 33 <string> if (arg instanceof Boolean) { <string> if (((Checkbox)evt.target).getLabel().equals("Stress")) { <string> panel.stress = ((Boolean)arg).booleanValue(); <string> } else { <string> panel.random = ((Boolean)arg).booleanValue(); <string> } <string> return true; <string> } <string> if ("Scramble".equals(arg)) { <string> play(getCodeBase(), "audio/computer.au"); <string> Dimension d = size(); <string> for (int i = 0 ; i < panel.nnodes ; i++) { <string> Node n = panel.nodes[i]; <string> if (!n.fixed) { <string> n.x = 10 + (d.width-20)*Math.random(); <string> n.y = 10 + (d.height-20)*Math.random(); <string> } <string> } <string> return true; <string> } <string> if ("Shake".equals(arg)) { <string> play(getCodeBase(), "audio/gong.au"); <string> Dimension d = size(); <string> for (int i = 0 ; i < panel.nnodes ; i++) { <string> Node n = panel.nodes[i]; <string> if (!n.fixed) { <string> n.x += 80*Math.random() - 40; <string> n.y += 80*Math.random() - 40; <string> } <string> } <string> return true; <string> } <string> return false; <integer> 1 <boolean> FALSE <boolean> TRUE <integer> 0 <storable> <string> TJavaClass <integer> 747 <integer> 542 <integer> 857 <integer> 577 <string> Thread <integer> 0 <integer> 0 <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <storable> <string> TText <integer> 492 <integer> 122 <integer> 602 <integer> 137 <string> multiple inheritance <storable> <string> TJavaClass <integer> 762 <integer> 387 <integer> 872 <integer> 422 <string> Applet <integer> 0 <integer> 0 <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <storable> <string> TInheritance <integer> 802 <integer> 437 <integer> 822 <integer> 457 <storable> <string> TJavaClass <integer> 132 <integer> 42 <integer> 242 <integer> 77 <string> Object <integer> 0 <integer> 0 <integer> 0 <boolean> FALSE <boolean> FALSE <integer> 0 <storable> <string> TInheritance <integer> 172 <integer> 102 <integer> 192 <integer> 122 <integer> 13 <storable> <string> TSuperClassing <integer> 2 <integer> 4 <integer> 2 <integer> 457 <integer> 67 <integer> 457 <integer> 127 <storable> <string> TSubClassing <integer> 4 <integer> 3 <integer> 3 <integer> 467 <integer> 147 <integer> 517 <integer> 147 <integer> 517 <integer> 197 <storable> <string> TAssociation <integer> 3 <integer> 0 <integer> 3 <integer> 412 <integer> 342 <integer> 117 <integer> 342 <integer> 117 <integer> 277 <string> <string> nodes <integer> 0 <integer> 0 <integer> 1 <integer> 1 <integer> 100 <storable> <string> TAssociation <integer> 3 <integer> 1 <integer> 3 <integer> 412 <integer> 287 <integer> 257 <integer> 287 <integer> 257 <integer> 227 <string> <string> edges <integer> 0 <integer> 0 <integer> 1 <integer> 1 <integer> 200 <storable> <string> TSuperClassing <integer> 5 <integer> 6 <integer> 2 <integer> 637 <integer> 82 <integer> 637 <integer> 127 <storable> <string> TSubClassing <integer> 6 <integer> 3 <integer> 3 <integer> 627 <integer> 147 <integer> 577 <integer> 147 <integer> 577 <integer> 197 <storable> <string> TAssociation <integer> 3 <integer> 8 <integer> 3 <integer> 667 <integer> 377 <integer> 667 <integer> 557 <integer> 747 <integer> 557 <string> <string> relaxer <integer> 0 <integer> 0 <integer> 0 <integer> 0 <integer> 0 <storable> <string> TAssociation <integer> 7 <integer> 3 <integer> 2 <integer> 452 <integer> 482 <integer> 452 <integer> 377 <string> graph <string> panel <integer> 0 <integer> 0 <integer> 0 <integer> 0 <integer> 0 <storable> <string> TSuperClassing <integer> 10 <integer> 11 <integer> 2 <integer> 812 <integer> 422 <integer> 812 <integer> 437 <storable> <string> TSubClassing <integer> 11 <integer> 7 <integer> 3 <integer> 802 <integer> 457 <integer> 532 <integer> 457 <integer> 532 <integer> 482 <storable> <string> TSuperClassing <integer> 12 <integer> 13 <integer> 2 <integer> 182 <integer> 77 <integer> 182 <integer> 102 <storable> <string> TSubClassing <integer> 13 <integer> 0 <integer> 3 <integer> 172 <integer> 122 <integer> 112 <integer> 122 <integer> 112 <integer> 147 <storable> <string> TSubClassing <integer> 13 <integer> 1 <integer> 3 <integer> 192 <integer> 122 <integer> 252 <integer> 122 <integer> 252 <integer> 147