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index.zulzul<zk>
<window apply="pkg$.TreeDndComposer" border="normal" width="500px">
<tree id="dndTree">
<treecols>
<treecol draggable="true" droppable="true" label="${$composer.columnOrder[0]}" />
<treecol draggable="true" droppable="true" label="${$composer.columnOrder[1]}" />
<treecol draggable="true" droppable="true" label="${$composer.columnOrder[2]}" />
</treecols>
<template name="model">
<treeitem value="${each}" draggable="${!each.leaf}" droppable="${!each.leaf}" onDrop="$composer.onRowDrop(event)">
<treerow>
<treecell label="${each.data[$composer.columnOrder[0]]}" />
<treecell label="${each.data[$composer.columnOrder[1]]}" />
<treecell label="${each.data[$composer.columnOrder[2]]}" />
</treerow>
</treeitem>
</template>
</tree>
</window>
</zk>TreeDndComposer.javajavaimport java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.DropEvent;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Listen;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.Tree;
import org.zkoss.zul.TreeNode;
import org.zkoss.zul.Treecol;
import org.zkoss.zul.Treecols;
import org.zkoss.zul.Treeitem;
public class TreeDndComposer extends SelectorComposer {
private DefaultTreeModel<MyRowInfo> treeModel;
@Wire("#dndTree")
Tree tree;
private List<String> columnOrder = new ArrayList(Arrays.asList("name", "amount", "description"));
@Override
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
createTreeModel();
tree.setModel(treeModel);
}
@Listen("onDrop=treecol")
public void onColumnDrop(DropEvent event) {
if(event.getDragged() instanceof Treecol) {
Treecol draggedCol = (Treecol)event.getDragged();
Treecol targetCol = (Treecol)event.getTarget();
String draggedColName = draggedCol.getLabel();
columnOrder.remove(draggedColName);
int targetIndex = columnOrder.indexOf(targetCol.getLabel());
columnOrder.add(targetIndex, draggedColName);
Treecols treecols = (Treecols) targetCol.getParent();
treecols.insertBefore(draggedCol, targetCol);
//rerender tree
tree.setModel(null);
tree.setModel(treeModel);
tree.invalidate();
} else {
System.out.println("ignore invalid drop");
}
}
public void onRowDrop(DropEvent event) {
System.out.println("row drop");
if(event.getDragged() instanceof Treeitem) {
DefaultTreeNode<MyRowInfo> draggedValue = ((Treeitem)event.getDragged()).getValue();
DefaultTreeNode<MyRowInfo> targetValue = ((Treeitem)event.getTarget()).getValue();
//preserve open objects
Set<TreeNode<MyRowInfo>> openObjects = treeModel.getOpenObjects();
TreeNode<MyRowInfo> draggedParent = draggedValue.getParent();
TreeNode<MyRowInfo> targetParent = targetValue.getParent();
draggedParent.getChildren().remove(draggedValue);
int targetIndex = targetParent.getIndex(targetValue);
targetParent.getChildren().add(targetIndex, draggedValue);
//restore open objects
treeModel.setOpenObjects(openObjects);
} else {
System.out.println("ignore invalid drop");
}
}
private void createTreeModel() {
MyRowInfo rootInfo = new MyRowInfo("root", 0, "does not display");
TreeNode<MyRowInfo> root = new DefaultTreeNode<MyRowInfo>(rootInfo, createTreeNodes());
treeModel = new DefaultTreeModel<MyRowInfo>(root, true);
}
private List<TreeNode<MyRowInfo>> createTreeNodes() {
List<TreeNode<MyRowInfo>> firstLevelChildren = new ArrayList<TreeNode<MyRowInfo>>();
firstLevelChildren.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo("cars", 90, "all cars"), createLeafNodes("car")));
firstLevelChildren.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo("fruit", 90, "all fruit"), createLeafNodes("fruit")));
firstLevelChildren.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo("tables", 90, "all tables"), createLeafNodes("table")));
firstLevelChildren.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo("items", 90, "all items"), createLeafNodes("item")));
return firstLevelChildren;
}
private Collection<? extends TreeNode<MyRowInfo>> createLeafNodes(String name) {
List<TreeNode<MyRowInfo>> leafNodes = new ArrayList<TreeNode<MyRowInfo>>();
leafNodes.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo(name + "-1", 10, name + " number " + 1)));
leafNodes.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo(name + "-2", 20, name + " number " + 2)));
leafNodes.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo(name + "-3", 30, name + " number " + 3)));
leafNodes.add(new DefaultTreeNode<MyRowInfo>(new MyRowInfo(name + "-4", 30, name + " number " + 4)));
return leafNodes;
}
public List<String> getColumnOrder() {
return columnOrder;
}
}
MyRowInfo.javajavapublic class MyRowInfo {
private String name;
private int amount;
private String description;
public MyRowInfo(String name, int amount, String description) {
super();
this.name = name;
this.amount = amount;
this.description = description;
}
public String getName() {
return name;
}
public int getAmount() {
return amount;
}
public String getDescription() {
return description;
}
}