b30-1958774.zul

来自「ZK是一个Ajax Java Web框架」· ZUL 代码 · 共 119 行

<?xml version="1.0" encoding="UTF-8"?>

<!--
B30-1958774.zul

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Wed May  7 15:15:58 TST 2008, Created by jumperchen
}}IS_NOTE

Copyright (C) 2008 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
}}IS_RIGHT
-->
<window mode="overlapped" title="tree demo" border="normal" position="center" height="300px" width="400px">
 If you can see this page without any error, it's correct.
 <zscript>
  <![CDATA[
    import java.util.Vector;
    public class treeModel extends AbstractTreeModel {

      public treeModel (Vector treeData) {
	super(treeData);
      }

      public boolean isLeaf (Object node) {
	return !(node instanceof Vector);
      }

      public Object getChild (Object parent,int index) {
	Vector vec = (Vector) parent;
	if (vec==getRoot())
	  return vec.get(index);
	else
	  return vec.get(index+1);
      }

      public int getChildCount (Object parent) {
	Vector vec = (Vector) parent;
	if (vec==getRoot())
	  return vec.size();
	else
	  return vec.size()-1;
      }

    }

    TreeitemRenderer itemRenderer = new TreeitemRenderer () {
      public void render(Treeitem ti,Object data) {
	Treerow tr = ti.getTreerow();
	// According to TreeitemRenderer docs, "a new treerow should be
	// contructed and append to treeitem, when treerow of treeitem is null.
	// Otherwise, when treerow of treeitem is not null, modify the content
	// of the treerow or detach the treerow's children first, since that
	// only one treerow is allowed."
	//
	if (tr==null) {
	  tr = new Treerow();
	  tr.setParent(ti);
	} else {
	  while (tr.getChildren().size()>0) {
	    ((Component)tr.getChildren().get(0)).detach();
	  }
	}

	if (data instanceof Vector) {
	  String label = (String) ((Vector) data).get(0);
	  Treecell tc = new Treecell(label);
	  tc.setParent(tr);
	  // Exception thrown if we try to do setOpen here:
	  ti.setOpen(true);
	} else {
	  String label = (String) data;
	  Treecell tc = new Treecell(label);
	  tc.setParent(tr);
	}
      }
    };

    public class myTree extends Tree {
      public myTree () {
	//
	// Compose the tree model as a vector of vectors.  Each vector inside
	// the root vector stores the label of the branch in the first value,
	// and remaining values are labels for the child nodes.
	Vector treeData = new Vector();

	// Make the first branch.
	Vector branch1 = new Vector();
	treeData.add(branch1);
	branch1.add("BRANCH1");
	branch1.add("node1");
	branch1.add("node2");

	// Make a second branch.
	Vector branch2 = new Vector();
	treeData.add(branch2);
	branch2.add("BRANCH2");
	branch2.add("node1");
	branch2.add("node2");

	treeModel tm = new treeModel(treeData);
        setTreeitemRenderer(itemRenderer);
	setModel(tm);
      }
    }

    myTree tree = new myTree();
    tree.setParent(self);
  ]]>
  </zscript>
</window>