Primefaces p:在tabView中确认对话框

Question

我现在在tabView中使用confirmDialog时遇到问题.这是我的确认对话

<p:confirmDialog global="true" showEffect="fade" hideEffect="explode">
    <h:form>
        <p:commandButton value="Yes" type="button"
            styleClass="ui-confirmdialog-yes" icon="ui-icon-check" />
        <p:commandButton value="No" type="button"
            styleClass="ui-confirmdialog-no" icon="ui-icon-close" />
    </h:form>
</p:confirmDialog>

在第一个tabView中,我有一个确认按钮

<p:commandButton value="Import" icon="ui-icon-arrowrefresh-1-w"
    update=":form:growl">
    <p:confirm header="Confirmation" message="Are you sure?" />
</p:commandButton>

在第二个tabView中,我有完全按钮.

现在我的问题是:在第一个选项卡中,我的confirmDialog有我想要的全文:标题和消息,但是在第二个选项卡中,标题和消息都变为"null".只有按钮yes和confirmDialog仍然有效.我不知道发生了什么,请帮助我,如何在所有tabView中使confirmdialog显示全部内容

Answer 1

p:confirm没有实现状态保存,因此它在第一个JSF生命周期后丢失了它的属性值.它还在视图构建时仅对EL进行一次评估.

如何修复状态保存.

你可以扩展PrimeFaces' ConfirmBehavior,实施saveState,restoreState以及覆盖由行为-ID faces-config.xml中原来的行为org.primefaces.behavior.ConfirmBehavior.然后,您将能够渲染并重新渲染p:确认后续请求.

如何修复状态保存并重新评估EL绑定属性值.

您应该创建自己的my:confirm,因为您需要一个自定义标签处理程序,并且您不能以非丑陋的方式替换另一个taglibrary标记的标记处理程序.

创建ConfirmBehavior.

package my;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.behavior.ClientBehaviorContext;
import javax.faces.context.FacesContext;

import org.primefaces.behavior.base.AbstractBehavior;
import org.primefaces.component.api.Confirmable;
import org.primefaces.json.JSONObject;

public class ConfirmBehavior extends AbstractBehavior {

    public final static String BEHAVIOR_ID = "my.ConfirmBehavior";

    @Override
    public String getScript(ClientBehaviorContext behaviorContext) {
        FacesContext context = behaviorContext.getFacesContext();
        UIComponent component = behaviorContext.getComponent();
        String source = component.getClientId(context);
        String headerText = JSONObject.quote(this.getHeader());
        String messageText = JSONObject.quote(this.getMessage());

        if (component instanceof Confirmable) {
            String script = "PrimeFaces.confirm({source:\"" + source + "\",header:" + headerText + ",message:"
                    + messageText + ",icon:\"" + getIcon() + "\"});return false;";
            ((Confirmable) component).setConfirmationScript(script);

            return null;
        } else {
            throw new FacesException("Component " + source + " is not a Confirmable. ConfirmBehavior can only be "
                    + "attached to components that implement org.primefaces.component.api.Confirmable interface");
        }
    }

    public String getHeader() {
        return eval(PropertyKeys.header, null);
    }

    public void setHeader(String header) {
        setLiteral(PropertyKeys.header, header);
    }

    public String getMessage() {
        return eval(PropertyKeys.message, null);
    }

    public void setMessage(String message) {
        setLiteral(PropertyKeys.message, message);
    }

    public String getIcon() {
        return eval(PropertyKeys.icon, null);
    }

    public void setIcon(String icon) {
        setLiteral(PropertyKeys.icon, icon);
    }

    public enum PropertyKeys {
        header(String.class), message(String.class), icon(String.class);

        final Class<?> expectedType;

        PropertyKeys(Class<?> expectedType) {
            this.expectedType = expectedType;
        }
    }

    @Override
    protected Enum<?>[] getAllProperties() {
        return PropertyKeys.values();
    }

}

创建ConfirmBehaviorHandler.

package my;

import javax.faces.application.Application;
import javax.faces.view.facelets.BehaviorConfig;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagAttribute;

import org.primefaces.behavior.base.AbstractBehaviorHandler;

public class ConfirmBehaviorHandler extends AbstractBehaviorHandler<ConfirmBehavior> {

    private final TagAttribute header;
    private final TagAttribute message;
    private final TagAttribute icon;

    public ConfirmBehaviorHandler(BehaviorConfig config) {
        super(config);
        this.header = this.getAttribute(ConfirmBehavior.PropertyKeys.header.name());
        this.message = this.getAttribute(ConfirmBehavior.PropertyKeys.message.name());
        this.icon = this.getAttribute(ConfirmBehavior.PropertyKeys.icon.name());
    }

    @Override
    protected ConfirmBehavior createBehavior(FaceletContext ctx, String eventName) {
        Application application = ctx.getFacesContext().getApplication();
        ConfirmBehavior behavior = (ConfirmBehavior) application.createBehavior(ConfirmBehavior.BEHAVIOR_ID);

        setBehaviorAttribute(ctx, behavior, this.header, ConfirmBehavior.PropertyKeys.header.expectedType);
        setBehaviorAttribute(ctx, behavior, this.message, ConfirmBehavior.PropertyKeys.message.expectedType);
        setBehaviorAttribute(ctx, behavior, this.icon, ConfirmBehavior.PropertyKeys.icon.expectedType);

        return behavior;
    }

}

在faces-config.xml中注册ConfirmBehavior.

<?xml version="1.0" encoding="utf-8"?>
<faces-config xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
    version="2.2">

    <behavior>
        <behavior-id>my.ConfirmBehavior</behavior-id>
        <behavior-class>my.ConfirmBehavior</behavior-class>
    </behavior>

</faces-config>

在taglibrary my.taglib.xml中注册ConfirmBehaviorHandler.

<?xml version="1.0" encoding="UTF-8"?>
<facelet-taglib xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facelettaglibrary_2_2.xsd"
    version="2.2">

    <namespace>http://mycompany.ru/my</namespace>

    <tag>
        <tag-name>confirm</tag-name>
        <behavior>
            <behavior-id>my.ConfirmBehavior</behavior-id>
            <handler-class>my.ConfirmBehaviorHandler</handler-class>
        </behavior>
    </tag>

</facelet-taglib>

现在你可以使用我的:确认,就像使用p:confirm一样,但是使用状态保存和动态EL评估.