关于apply属性使用的一些例子

来源：互联网发布：300英雄数据编辑：程序博客网时间：2024/06/05 07:39

前些天根据在ZK官网上找了些关于apply的使用例子，例子很简单。但是还是受益
匪浅。为避免忘记，做下详细的代码记录：

ZUL 文件：

<zk><window title="composer1 example" width="300px" apply="com.ui.MyComposer3" border="normal"> <grid> <rows> <row>First name : <textbox id="fname" forward="onChange=onFirstName"/></row> <row>Second name : <textbox id="sname" forward="onChange=onSecondName"/></row> <row>Full name : <label id="fullname"/></row> </rows> </grid></window></zk>

通过指定apply的内容调用UI层的不同方法。

例1：com.ui.MyComposer 文件代码：

public class MyComposer implements Composer{ //实现Composer接口 private Textbox firstname; private Textbox secondname; private Label fullname; public void doAfterCompose(Component win) throws Exception { firstname = (Textbox) win.getFellow("fname"); //页面的数据通过getFellow获得 secondname = (Textbox) win.getFellow("sname"); fullname = (Label) win.getFellow("fullname"); //定义并注册事件监听器 win.addEventListener("onFirstName", new EventListener() { public void onEvent(Event even) throws Exception { fullname.setValue(firstname.getValue()+" "+secondname.getValue()); } }); win.addEventListener("onSecondName", new EventListener() { public void onEvent(Event arg0) throws Exception { fullname.setValue(firstname.getValue()+" "+secondname.getValue()); } }); } }

例2：com.ui.MyComposer1 文件代码：

public class MyComposer1 extends GenericComposer { 继承GenericComposer 类 private Textbox firstname; private Textbox secondname; private Label fullname; public void doAfterCompose(Component win) throws Exception { super.doAfterCompose(win); firstname = (Textbox) win.getFellow("fname"); secondname = (Textbox) win.getFellow("sname"); fullname = (Label) win.getFellow("fullname"); //添加 addEventListener(remove 到该方法外) } public void onFirstName(Event event){ fullname.setValue(firstname.getValue()+" "+ secondname.getValue()); } public void onSecondName(Event event){ fullname.setValue(firstname.getValue()+" "+ secondname.getValue()); }}

相对于MyComposer 来说， MyComposer1 的代码更具有可读性，它将监听器作为独立的方法从doAfterCompose方法
中分离出来，但其执行的效果是相同的。这是因为MyCompser1 继承了 GenericComposer 类

例3：MyComposer2.java 文件代码：

public class MyComposer2 extends GenericAutowireComposer { private Textbox fname; //auto-wired (属性名要与id标志匹配) private Textbox sname; private Label fullname; //所有的getFellow 都可以省了 public void onFirstName(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); } public void onSecondName(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); }}

例3相比于例2来说，代码更为简洁。它通过继承GenericAutowireComposer ，只要属性名与Id值相同
就可以自动绑定数据而不需要调用getFellow方法。

GenericAutowireComposer类中的doAfterCompose 方法会自动帮你注入匹配的值。包括Spring的bean类
如例4：

spring-config.xml 文件代码：

...<bean id="taskDao" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">...

taskEditor.zul 文件代码：

<window id="taskWnd" title="Task Editor" border="normal" width="500px" apply="TaskEditorComposer"> <grid> <rows> <row>Title: <textbox id="title"/></row> <row>Description: <textbox id="description"/></row> </rows> </grid> <button id="saveBtn" label="Save" forward="onClick=onSaveTask"/></window>

TaskEditorComposer.java 文件代码

public class TaskEditorComposer extends GenericAutowireComposer { private TransactionProxyFactoryBean taskDao; //Spring bean auto wired private Textbox title; //auto wired private Textbox description; //auto wired private Button saveBtn; //auto wired public void onSaveTask(Event event) { Task currentTask = componentScope.get("task"); currentTask.setTitle(title.getValue()); currentTask.setDescription(description.getValue()); taskDao.update(currentTask); } ...}

例5：MyComposer3.java 文件代码：

该例子是为了说明GenericAutowireComposer 类支持隐式对象，例子用"self"举例

public class MyComposer3 extends GenericAutowireComposer{ private Textbox fname; private Textbox sname; private Label fullname; public void onFirstName(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); ((Window)self).setTitle("First Name Changed "); alert("First Name Changed to " + fname.getValue()); } public void onSecondName(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); ((Window)self).setTitle("Second Name Changed "); alert("Second Name Changed to " + sname.getValue()); }}

例6 是例5的另一种实现。将java代码嵌套在zul文件中

例6：comp1_3.zul 文件代码：

<zk><window title="composer 1_3 example " border="normal" width="300px"> <attribute name="onFirstName">  </attribute> <grid> <rows> <row>First Name : <textbox id="fname" forward="onChange=onFirstName"/></row> <row>Second Name : <textbox id="sname" forward="onChange=onSecondName"/></row> <row>Full Name : <label id="fullname"/></row> </rows> </grid></window></zk>

例7 ： comp2.zul 文件代码

<zk><window title="comp2 example " border="normal" apply="com.ui.MyComposer5" width="500"><grid> <rows> <row>First Name:<textbox id="fname"/></row> <row>Second Name:<textbox id="sname"/></row> <row>full Name:<label id="fullname"/></row> </rows></grid></window></zk>

MyComposer4.java 文件代码：

public class MyComposer4 extends GenericForwardComposer{ private Label fullname; private Textbox fname; private Textbox sname; public void onChange$fname(){ fullname.setValue(fname.getValue()+" "+sname.getValue() ); } public void onChange$sname(){ fullname.setValue(fname.getValue()+" "+sname.getValue()); } public void onClick$fullname(){ ((Window)self).setTitle(" full name OnClick "); alert("the full name is " + fullname.getValue()); }}

MyComposer4 类继承了 GenericForwardComposer.可以通过监听器的方法名指定监听的
组件（以xx$xx的方式），不需要在zul文件中指定 “forward” 属性

例8 ：实际应用中，当你不得不实现其他接口，继承其他的类时，你可以使用以下方式以达到例6的效果

MyComposer5.java 文件代码：

public class MyComposer5 implements Composer{ private Textbox fname; private Textbox sname; private Label fullname; public void doAfterCompose(Component win) throws Exception { //绑定变量值 Components.wireVariables(win, this); //注册onXXX事件监听器 Events.addEventListeners(win, this); //自动跳转 Components.addForwards(win, this); } public void onChange$fname(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); } public void onChange$sname(Event event){ fullname.setValue(fname.getValue()+" "+sname.getValue()); } }

例9 ：当需要使用use 属性时

comp4.zul 文件代码：

<window title="mywindow example" border="normal" width="300px" use="MyWindow"> <grid> <rows> <row>First Name: <textbox id="firstName"/></row> <row>Last Name: <textbox id="lastName"/></row> <row>Full Name: <label id="fullName"/></row> </rows> </grid></window>

MyComposer.java 文件代码：

public class MyComposer6 extends Window implements AfterCompose{ private Textbox fname; private Textbox sname; private Label fullname; public void afterCompose() { //绑定属性值 Components.wireVariables(this, this); //此时不需要注册事件监听器 //指定自动跳转 Components.addForwards(this, this); } public void onChange$fname(Event event){ fullname.setValue(fname.getValue()+" "+ sname.getValue()); } public void onChange$sname(Event event){ fullname.setValue(fullname.getValue()+" "+ sname.getValue()); } }