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Java/part/GenTreeTestModel.java

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+/*   
+GTreePartTestModel.java
+ *    
+ *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Tuomas Lukka
+ */
+package org.gzigzag;
+import java.util.*;
+
+/** A simple model to test GenTreePart.
+ * The same model as ImpliedTreePart has, except that the depth 
+ * numbers are reversed and are 0, 1, 2 and 3. 
+ * The actual cells in the stream are not included in the tree, only
+ * the section marker cells.
+ * @see GenTreePart
+ */
+
+public class GenTreeTestModel implements GenTreePartModel {
+public static final String rcsid = "$Id: GenTreeTestModel.java,v 1.1 2000/11/16 00:25:10 tjl Exp $";
+    public static boolean dbg = true;
+    final static void p(String s) { if(dbg) System.out.println(s); }
+    final static void pa(String s) { System.out.println(s); }
+
+    public int depth() {
+	return 4;
+    }
+
+    public int depth(ZZCell c) {
+	if(c.s("d.1") == null)
+	    return -1;
+	// So the int it 0..3
+	return Integer.parseInt(c.getText());
+    }
+
+    public ZZCell getNext(int mindepth, ZZCell c, int steps) {
+	if(steps == 0) return c;
+	c = c.s("d.1");
+	int dir = (steps > 0 ? 1 : -1);
+	ZZCell lasthdr = null;
+	while(steps != 0 && c != null) {
+		c = c.s("d.2", dir);
+		if(c == null) return null;
+		lasthdr = c.s("d.1", -1);
+		if(lasthdr == null) continue;
+		if(depth(lasthdr) < mindepth) continue;
+		steps -= dir;
+	}
+	if(c == null) return null;
+	return lasthdr;
+    }
+
+    public void disconnectNeg(ZZCell c) {
+	p("Model: disconnectneg "+c);
+	c.h("d.1", 1).disconnect("d.2", -1);
+    }
+
+    public void connect(ZZCell c, ZZCell d) {
+	p("Model: connect "+c+" "+d);
+	c.h("d.1", 1).h("d.2", 1).connect("d.2", d.h("d.1", 1));
+    }
+
+    public void setDepth(ZZCell c, int d) {
+	if(depth(c) == 0) return;
+	c.setText(""+d);
+    }
+
+}