/**
* License Agreement.
*
* JBoss RichFaces - Ajax4jsf Component Library
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library 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 GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces.demo.tree;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import org.ajax4jsf.context.AjaxContext;
import org.richfaces.component.UITree;
import org.richfaces.component.UITreeNode;
import org.richfaces.component.html.HtmlTree;
import org.richfaces.event.DropEvent;
import org.richfaces.event.NodeSelectedEvent;
import org.richfaces.model.TreeNode;
import org.richfaces.model.TreeNodeImpl;
import org.richfaces.model.TreeRowKey;
public class SimpleTreeDndBean {
private TreeNode rootNode = null;
private List<String> selectedNodeChildren = new ArrayList<String>();
private String nodeTitle;
private static final String DATA_PATH = "/richfaces/tree/examples/simple-tree-data-dnd.properties";
private void addNodes(String path, TreeNode node, Properties properties) {
boolean end = false;
int counter = 1;
while (!end) {
String key = path != null ? path + '.' + counter : String.valueOf(counter);
String value = properties.getProperty(key);
if (value != null) {
TreeNodeImpl nodeImpl = new TreeNodeImpl();
nodeImpl.setData(value);
node.addChild(new Integer(counter), nodeImpl);
addNodes(key, nodeImpl, properties);
counter++;
} else {
end = true;
}
}
}
private void loadTree() {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
InputStream dataStream = externalContext.getResourceAsStream(DATA_PATH);
try {
Properties properties = new Properties();
properties.load(dataStream);
rootNode = new TreeNodeImpl();
addNodes(null, rootNode, properties);
} catch (IOException e) {
throw new FacesException(e.getMessage(), e);
} finally {
if (dataStream != null) {
try {
dataStream.close();
} catch (IOException e) {
externalContext.log(e.getMessage(), e);
}
}
}
}
public void processSelection(NodeSelectedEvent event) {
HtmlTree tree = (HtmlTree) event.getComponent();
nodeTitle = (String) tree.getRowData();
selectedNodeChildren.clear();
TreeNode currentNode = tree.getModelTreeNode(tree.getRowKey());
if (currentNode.isLeaf()){
selectedNodeChildren.add((String)currentNode.getData());
}else
{
Iterator<Map.Entry<Object, TreeNode>> it = currentNode.getChildren();
while (it!=null &&it.hasNext()) {
Map.Entry<Object, TreeNode> entry = it.next();
selectedNodeChildren.add(entry.getValue().getData().toString());
}
}
}
private Object getNewId(TreeNode parentNode) {
Map<Object, TreeNode> childs = new HashMap<Object, TreeNode>();
Iterator<Map.Entry<Object, TreeNode>> iter = parentNode.getChildren();
while (iter != null && iter.hasNext()) {
Map.Entry<Object, TreeNode> entry = iter.next();
childs.put(entry.getKey(), entry.getValue());
}
Integer index = 1;
while (childs.containsKey(index)) {
index++;
}
return index;
}
public void dropListener(DropEvent dropEvent) {
// resolve drag source attributes
UITreeNode srcNode = (dropEvent.getDraggableSource() instanceof UITreeNode) ? (UITreeNode) dropEvent.getDraggableSource() : null;
UITree srcTree = srcNode != null ? srcNode.getUITree() : null;
TreeRowKey dragNodeKey = (dropEvent.getDragValue() instanceof TreeRowKey) ? (TreeRowKey) dropEvent.getDragValue() : null;
TreeNode draggedNode = dragNodeKey != null ? srcTree.getTreeNode(dragNodeKey) : null;
// resolve drag destination attributes
UITreeNode destNode = (dropEvent.getSource() instanceof UITreeNode) ? (UITreeNode) dropEvent.getSource() : null;
UITree destTree = destNode != null ? destNode.getUITree() : null;
TreeRowKey dropNodeKey = (dropEvent.getDropValue() instanceof TreeRowKey) ? (TreeRowKey) dropEvent.getDropValue() : null;
TreeNode droppedInNode = dropNodeKey != null ? destTree.getTreeNode(dropNodeKey) : null;
// Note: check if we dropped node on to itself or to item instead of folder here
if (droppedInNode != null && (droppedInNode.equals(draggedNode) || droppedInNode.getParent().getParent() != null || draggedNode.getParent().getParent() == null)) {
System.out.println("Warning: Can't drop on itself or to pic itself! Also can't move folders");
return;
}
FacesContext context = FacesContext.getCurrentInstance();
if (dropNodeKey != null) {
// add destination node for rerender
destTree.addRequestKey(dropNodeKey);
Object state = null;
if (dragNodeKey != null) { // Drag from this or other tree
TreeNode parentNode = draggedNode.getParent();
// 1. remove node from tree
state = srcTree.removeNode(dragNodeKey);
// 2. add parent for rerender
Object rowKey = srcTree.getTreeNodeRowKey(parentNode);
srcTree.addRequestKey(rowKey);
} else if (dropEvent.getDragValue() != null) { // Drag from some drag source
draggedNode = new TreeNodeImpl<String>();
draggedNode.setData(dropEvent.getDragValue().toString());
}
// generate new node id
Object id = getNewId(destTree.getTreeNode(dropNodeKey));
destTree.addNode(dropNodeKey, draggedNode, id, state);
}
AjaxContext ac = AjaxContext.getCurrentInstance();
// Add destination tree to reRender
try {
ac.addComponentToAjaxRender(destTree);
} catch (Exception e) {
System.err.print(e.getMessage());
}
}
public List<String> getSelectedNodeChildren() {
return selectedNodeChildren;
}
public void setSelectedNodeChildren(List<String> selectedNodeChildren) {
this.selectedNodeChildren = selectedNodeChildren;
}
public TreeNode getTreeNode() {
if (rootNode == null) {
loadTree();
}
return rootNode;
}
public String getNodeTitle() {
return nodeTitle;
}
public void setNodeTitle(String nodeTitle) {
this.nodeTitle = nodeTitle;
}
}