Return To Page (1)

Sometimes a page can be called from many other pages. If so, it can be tricky for the page to return to the previous page.
This example shows a way to do it.

This page creates a Link to itself, complete with the current context (ie. the value of arg1). It passes the Link to the next page.
References: Link, PageRenderLinkSource.

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- We need a doctype to allow us to use special characters like &nbsp; 
     We use a "strict" DTD to make IE follow the alignment rules. -->
     
<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd">
<body class="container">
    <h3>Return To Page (1)</h3>
    
    Sometimes a page can be called from many other pages.  If so, it can be tricky for the page to return to the previous page.<br/>
    This example shows a way to do it.<br/><br/>
    
    This page creates a Link to itself, complete with the current context (ie. the value of arg1).  
    It passes the Link to the next page.
    
    <div class="eg">
        <t:form class="form-inline" t:id="inputs">
            <div class="form-group">
                <t:label for="arg1">Current context</t:label> 
                <t:textfield t:id="arg1"/>
                <t:submit/>
            </div>
        </t:form> 
    </div>

    References: 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/Link.html">Link</a>, 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/services/PageRenderLinkSource.html">PageRenderLinkSource</a>.<br/><br/>

    <t:pagelink page="Index">Home</t:pagelink><br/><br/>

    <t:tabgroup>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/navigation/ReturnToPage1.tml"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/navigation/ReturnToPage1.java"/>
        <t:sourcecodetab src="/web/src/main/resources/META-INF/assets/css/examples/returntopage1.css"/>
    </t:tabgroup>
</body>
</html>



package jumpstart.web.pages.examples.navigation;

import javax.validation.constraints.NotNull;

import org.apache.tapestry5.Link;
import org.apache.tapestry5.annotations.Import;
import org.apache.tapestry5.annotations.InjectPage;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.PageRenderLinkSource;

@Import(stylesheet = "css/examples/returntopage1.css")
public class ReturnToPage1 {

    // The activation context

    @Property
    @NotNull
    private String arg1;

    // Other pages

    @InjectPage
    private ReturnToPage2 page2;

    // Generally useful bits and pieces

    @Inject
    private PageRenderLinkSource pageRenderLinkSource;

    // The code

    // onActivate() is called by Tapestry to pass in the activation context from the URL.

    void onActivate(String arg1) throws Exception {
        this.arg1 = arg1;
    }

    // onPassivate() is called by Tapestry to get the activation context to put in the URL.

    String onPassivate() {
        return arg1;
    }

    Object onSuccess() {
        Link thisPage = pageRenderLinkSource.createPageRenderLinkWithContext(this.getClass(), onPassivate());
        page2.set("Hello", thisPage);
        return page2;
    }

}



.eg {
                margin: 20px 0;
                padding: 14px;
                color: #333;
                border: 1px solid #ddd;
                border-radius: 6px;
                -webkit-border-radius: 6px;
                -mox-border-radius: 6px;
} 

.eg input.form-control {
                width: auto;
}