ContainerCheckedTreeViewer 设置初始选中状态问题

[阿_布]

用ContainerCheckedTreeViewer构建一颗带复选框的树之后，要根据用户上次的设置保持初始选中状态，比如：

如果用户上次选择了中国，则中国下面所有子节点前面的复选框都为选中状态，如果用户只选择了北京，则只有中国和北京下面的子节点为选中状态，现在有一个问题，就是只能设置根节点的选中状态，即如果用户上次选择了中国，则可以在初始化树的时候设置中国及以下的节点为选中状态；如果用户只选择了北京，则没有办法只设置中国、北京及以下的节点为选中状态。有遇到过这个问题的兄弟请指导一下小弟，不慎感激！

中国
--北京
--中关村
--三元桥
--上海
--浦东
--广州
--天河
--白云
美国
--纽约
--曼哈顿
--休斯顿

[网络科技]

这个不是很清楚，楼主可以把关键代码贴出来给高人查看下那里出问题了

[阿_布]

数据类：

Itree.java

package model;

import java.util.List;

public interface Itree {
	public String getName();   
	public void setName(String name);   
	public void setChildren(List Children);   
	public List getChildren();
}

People.java

package model;

import java.util.List;

public class People implements Itree {
	private Long id;
	private String name;

	public People() {
	}

	public People(String name) {
		this.name = name;
	}

	public List getChildren() {
		return null;
	}

	public void setChildren(List children) {
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

City.java

package model;

import java.util.ArrayList;
import java.util.List;

public class City implements Itree {
	private Long id;
	private String name;
	private List children = new ArrayList();

	public City() {
	}

	public City(String name) {
		this.name = name;
	}

	public List getChildren() {
		return children;
	}

	public void setChildren(List children) {
		this.children = children;
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

Country.java

package model;

import java.util.ArrayList;
import java.util.List;

public class Country implements Itree {
	private Long id;
	private String name;
	private List children = new ArrayList();

	public Country() {
	}

	public Country(String name) {
		this.name = name;
	}

	public List getChildren() {
		return children;
	}

	public void setChildren(List children) {
		this.children = children;
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

Factory.java 产生数数据的类

package model;

import java.util.ArrayList;
import java.util.List;

public class Factory {
	@SuppressWarnings("unchecked")
	public static List createTree() {
		// 生成国家
		Country cn = new Country("中国");
		Country us = new Country("美国");
		Country jp = new Country("日本");
		// 生成城市
		City beijing = new City("北京");
		City shanghai = new City("上海");
		City shenzhen = new City("深圳");
		City newyork = new City("纽约");
		City la = new City("洛杉矶");
		City tokyo = new City("东京");
		City osaka = new City("大阪");
		// 北京人
		ArrayList list = new ArrayList();
		list.add(new People("张三"));
		list.add(new People("李四"));
		list.add(new People("王五"));
		beijing.setChildren(list);
		// 上海人
		list = new ArrayList();
		list.add(new People("翠花"));
		list.add(new People("小红"));
		list.add(new People("小崔"));
		shanghai.setChildren(list);
		//深圳人
		list = new ArrayList();
		list.add(new People("小三"));
		list.add(new People("小四"));
		shenzhen.setChildren(list);
		// 纽约人
		list = new ArrayList();
		list.add(new People("tom"));
		list.add(new People("rose"));
		list.add(new People("john"));
		newyork.setChildren(list);
		// 洛杉矶人
		list = new ArrayList();
		list.add(new People("Sofia"));
		list.add(new People("sarah"));
		list.add(new People("Jennifer"));
		la.setChildren(list);
		// 东京人
		list = new ArrayList();
		list.add(new People("渡边"));
		list.add(new People("鬼冢"));
		list.add(new People("山本"));
		tokyo.setChildren(list);
		// 大阪人
		list = new ArrayList();
		list.add(new People("奈奈子"));
		list.add(new People("菜菜子"));
		list.add(new People("新垣结衣"));
		osaka.setChildren(list);
		// 关联城市与国家
		// 中国
		ArrayList citys = new ArrayList();
		citys.add(beijing);
		citys.add(shanghai);
		citys.add(shenzhen);
		cn.setChildren(citys);
		// 美国
		citys = new ArrayList();
		citys.add(newyork);
		citys.add(la);
		us.setChildren(citys);
		// 日本
		citys = new ArrayList();
		citys.add(tokyo);
		citys.add(osaka);
		jp.setChildren(citys);
		// 国家列表
		ArrayList countrys = new ArrayList();
		countrys.add(cn);
		countrys.add(us);
		countrys.add(jp);
		return countrys;
	}
}

TreeLabelProvider.java

package model;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.swt.graphics.Image;

public class TreeLabelProvider implements ILabelProvider {
	public String getText(Object element) {
		Itree node = (Itree) element;
		return node.getName();
	}

	@Override
	public void addListener(ILabelProviderListener arg0) {
		// TODO Auto-generated method stub

	}

	@Override
	public void dispose() {
		// TODO Auto-generated method stub

	}

	@Override
	public boolean isLabelProperty(Object arg0, String arg1) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void removeListener(ILabelProviderListener arg0) {
		// TODO Auto-generated method stub

	}

	public Image getImage(Object element) {
		return null;
	}
}

TreeContentProvider.java

package model;

import java.util.List;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

public class TreeContentProvider implements IStructuredContentProvider,
		ITreeContentProvider {
	public Object[] getElements(Object inputElement) {
		if (inputElement instanceof List) {
			List input = (List) inputElement;
			return input.toArray();
		}
		return new Object[0];
	}

	public Object[] getChildren(Object parentElement) {
		Itree node = (Itree) parentElement;
		List list = node.getChildren();
		if (list == null) {
			return new Object[0];
		}
		return list.toArray();
	}

	public boolean hasChildren(Object element) {
		Itree node = (Itree) element;
		List list = node.getChildren();
		return !(list == null || list.isEmpty());
	}

	// 以下三个函数根据需要填充
	public Object getParent(Object element) {
		return null;
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

	public void dispose() {
	}
}

TestTreeViewer.java 程序入口类

package model;

import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.ui.dialogs.ContainerCheckedTreeViewer;

public class TestTreeViewer {
	private static Tree tree;

	public static void main(String[] args) {
		final Display display = Display.getDefault();
		final Shell shell = new Shell();
		shell.setSize(500, 375);
		shell.setText("SWT Application");
		//   
		final ContainerCheckedTreeViewer treeViewer = new ContainerCheckedTreeViewer(shell, SWT.BORDER
				| SWT.H_SCROLL);
		tree = treeViewer.getTree();
		tree.setBounds(83, 75, 264, 185);

		treeViewer.setLabelProvider(new TreeLabelProvider());
		treeViewer.setContentProvider(new TreeContentProvider());
		List data = Factory.createTree();
		treeViewer.setInput(data);
		
		//获取要设置为选中状态的项,这里是中间的节点，不可以。
		//Object[] item = new Object[]{((Itree)data.get(0)).getChildren().get(0)};
		//设置为选中状态
		//treeViewer.setCheckedElements(item);
		
		//如果是根节点就可以
		treeViewer.setCheckedElements(new Object[]{data.get(0)});
		
		shell.open();
		shell.setLayout(new FillLayout());
		shell.layout();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
	}
}

要用到的jar包：org.eclipse.jface.jar,org.eclipse.swt.win32.win32.x86.jar
org.eclipse.ui.workbench.jar,org.eclipse.equinox.common.jar
org.eclipse.core.commands.jar,org.eclipse.core.runtime.jar,org.eclipse.ui.forms.jar

[zings1986]

也遇到这个问题，苦于没人给回答，还好后来解决了。。
private ContainerCheckedTreeViewer checkboxTreeViewer;


checkboxTreeViewer.expandAll(); // 展开树结构（这句很重要）

TreeItem[] items = checkboxTreeViewer.getTree().getItems();

// 若树中有数据
if (items.length > 0) {
Object data = items[0].getData(); // 根节点数据
List<Object> childs = ((Itree) data).getChildren(); // 根节点下的子节点集合

//对子节点集合
for (Object child : childs) {
//所选中的话务模型
checkboxTreeViewer.setChecked(child, true);

}
}