[英]Stateless ModalDialog in Wicket
如何使用 Wicket 創建無狀態的ModalDialog ?
我嘗試了以下代碼,但它會導致錯誤。 刪除getStatelessHint()
覆蓋時不會發生錯誤,但這會使其成為有狀態的。 如果不可能,是否可以使用已棄用的ModalWindow ?
HTML:
<!DOCTYPE html>
<html>
<head>
<style>
.modal-dialog { border-radius: 5px; }
.modal-dialog .modal-dialog-content { display: flex; flex-direction: column; }
.modal-dialog-overlay.current-focus-trap .modal-dialog-content { resize: both; }
.modal-dialog .modal-dialog-form { margin: 0; padding: 0; overflow: hidden; flex: 1; display: flex; flex-direction: column; }
.modal-dialog .modal-dialog-header { border-radius: 5px 5px 0px 0px; background: #ffb158; margin: 0; padding-top: 4px; text-align: center; }
.modal-dialog .modal-dialog-body { flex: 1; overflow-y: auto; padding: 20px; }
.modal-dialog .modal-dialog-footer { padding: 5px; }
</style>
</head>
<body>
<a wicket:id="openModalLink">Open modal</a>
<div id="window" wicket:id="window"></div>
<wicket:fragment wicket:id="modalContentFragment">
<h1>Modal Dialog</h1>
<a wicket:id="closeModalLink">Close modal</a>
</wicket:fragment>
</body>
</html>
Java:
package org.example.modaltest;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.extensions.ajax.markup.html.modal.ModalDialog;
import org.apache.wicket.extensions.ajax.markup.html.modal.theme.DefaultTheme;
import org.apache.wicket.markup.html.GenericWebPage;
import org.apache.wicket.markup.html.panel.Fragment;
public class ModalPage extends GenericWebPage<Void> {
public ModalPage() {
ModalDialog window = new ModalDialog("window");
window.add(new DefaultTheme());
window.setMarkupId("window");
window.setOutputMarkupId(true);
add(window);
Fragment modalContentFragment = new Fragment(ModalDialog.CONTENT_ID, "modalContentFragment", this);
window.setContent(modalContentFragment);
modalContentFragment.setOutputMarkupId(true);
AjaxLink<Void> closeModalLink = new AjaxLink<Void>("closeModalLink") {
@Override
public void onClick(AjaxRequestTarget target) {
target.add(window);
ModalDialog window1 = (ModalDialog) findPage().get("window");
window1.close(target);
}
@Override
protected boolean getStatelessHint() {
return true;
}
};
closeModalLink.setOutputMarkupId(true);
modalContentFragment.add(closeModalLink);
AjaxLink<Void> openModalLink = new AjaxLink<Void>("openModalLink") {
@Override
public void onClick(AjaxRequestTarget target) {
ModalDialog window1 = (ModalDialog) findPage().get("window");
window1.open(target);
}
@Override
protected boolean getStatelessHint() {
return true;
}
};
add(openModalLink);
}
}
瀏覽器中的錯誤:
拒絕訪問。 您無權訪問您請求的頁面。 返回首頁
Java 異常:
16:34:16.382 [http-nio-8080-exec-4] WARN o.a.w.c.r.h.ListenerRequestHandler - behavior not enabled; ignore call. Behavior org.apache.wicket.ajax.markup.html.AjaxLink$1@5a149041 at component [AjaxLink [Component id = closeModalLink]]
16:34:16.386 [http-nio-8080-exec-4] WARN RequestCycleExtra - ********************************
16:34:16.390 [http-nio-8080-exec-4] WARN RequestCycleExtra - Handling the following exception
org.apache.wicket.core.request.handler.ListenerInvocationNotAllowedException: Behavior rejected interface invocation. Component: [AjaxLink [Component id = closeModalLink]] Behavior: org.apache.wicket.ajax.markup.html.AjaxLink$1@5a149041
at org.apache.wicket.core.request.handler.ListenerRequestHandler.invoke(ListenerRequestHandler.java:276)
at org.apache.wicket.core.request.handler.ListenerRequestHandler.invokeListener(ListenerRequestHandler.java:222)
at org.apache.wicket.core.request.handler.ListenerRequestHandler.respond(ListenerRequestHandler.java:208)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:902)
at org.apache.wicket.request.RequestHandlerExecutor.execute(RequestHandlerExecutor.java:63)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:283)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:254)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:276)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:207)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:306)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:407)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
16:34:16.390 [http-nio-8080-exec-4] WARN RequestCycleExtra - ********************************
問題如下:無狀態鏈接為每個請求創建一個新頁面。 該新頁面不知道先前打開了模式對話框。 因此,對嵌套 closeModalLink 的請求被拒絕,因為它當前不可見。
您必須通過請求 url 傳輸有關打開對話框的信息。 例如,您的 closeModalLink 可以通過#updateAjaxAttributes() 向其請求添加一個參數,該參數在創建新頁面時進行檢查,並在請求時自動打開對話框。
這是@svenmeier 試圖解釋的內容:
opened
,則在頁面創建時預先打開對話框,以便在以下請求中可以訪問其中的任何組件/行為open
的鏈接中添加一個額外的參數來設置 statepublic class ModalPage extends GenericWebPage<Void> {
public ModalPage(PageParameters parameters) {
super(parameters); // 1
ModalDialog window = new ModalDialog("window");
window.add(new DefaultTheme());
window.setMarkupId("window");
window.setOutputMarkupId(true);
add(window);
if (!parameters.get("mdOpened").isNull()) { // 2
window.open(null);
}
Fragment modalContentFragment = new Fragment(ModalDialog.CONTENT_ID, "modalContentFragment", this);
window.setContent(modalContentFragment);
modalContentFragment.setOutputMarkupId(true);
AjaxLink<Void> closeModalLink = new AjaxLink<Void>("closeModalLink") {
@Override
public void onClick(AjaxRequestTarget target) {
target.add(window);
ModalDialog window1 = (ModalDialog) findPage().get("window");
window1.close(target);
}
@Override
protected boolean getStatelessHint() {
return true;
}
};
closeModalLink.setOutputMarkupId(true);
modalContentFragment.add(closeModalLink);
AjaxLink<Void> openModalLink = new AjaxLink<Void>("openModalLink") {
@Override
public void onClick(AjaxRequestTarget target) {
ModalDialog window1 = (ModalDialog) findPage().get("window");
window1.open(target);
}
@Override
protected boolean getStatelessHint() {
return true;
}
// 3
@Override
public void updateAjaxAttributes(AjaxRequestAttributes attributes) {
attributes.getExtraParameters().put("mdOpened", "true");
}
};
add(openModalLink);
}
}
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