第二十六講：tapestry的樹狀(tree)組件

時間 2019-11-12

標籤第二十六 tapestry 樹狀 tree 組件简体版

原文原文鏈接

tapestry提供了樹狀組件tree，源碼以下：html

TreeBrowse.javajava

/**

* 項目名稱：TapestryStart

* 開發模式：Maven+Tapestry5.x+Tapestry-hibernate+Mysql

* 網址： http://www.flywind.org

* 版本：1.0

* 編寫：飛風

* 時間：2012-02-29

package com.tapestry.app.pages;

import org.apache.tapestry5.ValueEncoder;

import org.apache.tapestry5.annotations.InjectComponent;

import org.apache.tapestry5.corelib.components.Tree;

import org.apache.tapestry5.tree.DefaultTreeModel;

import org.apache.tapestry5.tree.TreeModel;

import com.tapestry.app.entities.Stuff;

import com.tapestry.app.services.StuffTreeModelAdapter;

public class TreeBrowse {

// Screen fields

private TreeModel<Stuff> stuffModel;

// Generally useful bits and pieces

@InjectComponent

private Tree tree;

// The code

void onClearExpansions() {

tree.clearExpansions();

}

// Getters and setters

public TreeModel<Stuff> getStuffModel() {

if (stuffModel == null) {

ValueEncoder<Stuff> stuffEncoder = new ValueEncoder<Stuff>() {

@Override

public String toClient(Stuff stuff) {

return stuff.uuid;

}

@Override

public Stuff toValue(String uuid) {

return Stuff.ROOT.searchSubTree(uuid);

}

};

stuffModel = new DefaultTreeModel<Stuff>(stuffEncoder, new StuffTreeModelAdapter(), Stuff.ROOT.children);

}

return stuffModel;

}

TreeBrowse.tmlsql

<html t:type="layout" title="tapestryStart Index" t:sidebarTitle="Framework Version"

xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd" xmlns:p="tapestry:parameter">

<a t:type="eventlink" t:event="clearExpansions">Clear Expansions</a><br/><br/>

<t:tree t:id="tree" model="stuffModel"/><br/>

<a t:type="pagelink" t:page="TreeBrowse" href="#">Refresh</a>

</div>

</html>

Stuff.javaapache

/**

* 項目名稱：TapestryStart

* 開發模式：Maven+Tapestry5.x+Tapestry-hibernate+Mysql

* 網址： http://www.flywind.org

* 版本：1.0

* 編寫：飛風

* 時間：2012-02-29

package com.tapestry.app.entities;

import java.util.List;

import java.util.UUID;

import org.apache.tapestry5.ioc.internal.util.CollectionFactory;

public class Stuff {

public static final Stuff ROOT = new Stuff("<root>");

static {

ROOT.addChild(new Stuff("Pets").addChildrenNamed("Oscar", "Gromit", "Max", "Roger", "Cooper"));

ROOT.addChild(new Stuff("Games").addChild(

new Stuff("Board Games").addChildrenNamed("Settlers of Catan", "Agricola", "Ra", "Risk", "Dvonn"))

.addChild(new Stuff("Card Games").addChildrenNamed("Magic the Gathering", "Dominion", "Mu")));

Stuff numbers = new Stuff("Numbers");

for (int i = 0; i < 100; i++) {

numbers.addChild(new Stuff(Integer.toString(i)));

}

ROOT.addChild(numbers);

}

public final String uuid = UUID.randomUUID().toString();

public final String name;

public List<Stuff> children;

public Stuff(String name) {

this.name = name;

}

public Stuff addChild(Stuff child) {

if (children == null) {

children = CollectionFactory.newList();

}

children.add(child);

return this;

}

public Stuff addChildrenNamed(String... names) {

for (String name : names) {

addChild(new Stuff(name));

}

return this;

}

public Stuff searchSubTree(String uuid) {

if (this.uuid.equals(uuid)) {

return this;

}

for (Stuff child : children) {

Stuff match = child.searchSubTree(uuid);

if (match != null) {

return match;

}

return null;

}

StuffTreeModelAdapter.javaapp

/**

* 項目名稱：TapestryStart

* 開發模式：Maven+Tapestry5.x+Tapestry-hibernate+Mysql

* 網址： http://www.flywind.org

* 版本：1.0

* 編寫：飛風

* 時間：2012-02-29

package com.tapestry.app.services;

import java.util.List;

import org.apache.tapestry5.tree.TreeModelAdapter;

import com.tapestry.app.entities.Stuff;

public class StuffTreeModelAdapter implements TreeModelAdapter<Stuff> {

@Override

public boolean isLeaf(Stuff stuff) {

return !hasChildren(stuff);

}

@Override

public boolean hasChildren(Stuff stuff) {

return stuff.children != null && !stuff.children.isEmpty();

}

@Override

public List<Stuff> getChildren(Stuff stuff) {

return stuff.children;

}

@Override

public String getLabel(Stuff stuff) {

return stuff.name;

}

http://localhost/tree/browse

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