| <document> |
| <body> |
| <section name="Examples"> |
| |
| <subsection name="Start.tml"> |
| |
| <source><![CDATA[ |
| <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd" xmlns:p="tapestry:parameter"> |
| <body> |
| <h1>Welcome!</h1> |
| |
| <t:if test="user"> |
| Welcome back, ${user.firstName} |
| <p:else> |
| <t:pagelink name="login">Login</t:pagelink> / |
| <t:pagelink name="register">Register</t:pagelink> |
| </p:else> |
| </t:if> |
| |
| . . . |
| |
| </html>]]></source> |
| |
| <p> |
| Here, the main text is rendered if the user is logged in (the user property will |
| be non-null after the user logs in). Otherwise, links to a login and register |
| page are rendered. |
| </p> |
| |
| <p> |
| Note the use of the |
| <code>p:</code> |
| namespace (new in Tapestry 5.1). In 5.0, this would be |
| <code><t:parameter name="else"></code>. |
| </p> |
| |
| </subsection> |
| |
| |
| </section> |
| |
| <section name="Notes"> |
| |
| <p> |
| Tapestry has many built in coercions to boolean: |
| </p> |
| |
| <dl> |
| <dt>String</dt> |
| <dd>True if non-blank and not the literal string "false" (case insensitive)</dd> |
| <dt>Number</dt> |
| <dd>True if non-zero</dd> |
| <dt>Collection</dt> |
| <dd>True if non-empty</dd> |
| <dt>Object</dt> |
| <dd>True (as long as its not null)</dd> |
| </dl> |
| |
| |
| </section> |
| </body> |
| </document> |
