Let a page choose its layout
----------------------------

                 Key: TAP5-705
                 URL: https://issues.apache.org/jira/browse/TAP5-705
             Project: Tapestry 5
          Issue Type: Wish
          Components: tapestry-core
    Affects Versions: 5.0.18
            Reporter: Borut Bolcina


It would be great if a page could dynamically choose its layout. In some cases the page would use Layout1 component and in some cases Layout2.


The t:type="${layout}" does not get expanded to whatever I set in Index.java.

PageWithLayout.tml
===============
<div t:type="${layout}" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd">
    <p>page with ${layout}</p>
</div>

PageWithLayout.java
===============
public class PageWithLayout {

    private String layout;
  
    public String getLayout() {
        return layout;
    }

    public void setLayout(String layout) {
        this.layout = layout;
    }
}

Index.tml
=======
<t:actionlink t:id="PageWithLayout1">layout1</t:actionlink><br/>
<t:actionlink t:id="PageWithLayout2">layout2</t:actionlink>

Index.java
=======
public class Index {
    @InjectPage
    private PageWithLayout pageWithLayout;
  
    Object onActionFromPageWithLayout1() {
        pageWithLayout.setLayout("layout1");
        return pageWithLayout;
    }
  
    Object onActionFromPageWithLayout2() {
        pageWithLayout.setLayout("layout2");
        return pageWithLayout;
    }
}

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