- org.apache.tapestry5.corelib.components.Label

@SupportsInformalParameters
public class Label
extends

Generates a <label> element for a particular field. It writes the CSS class "control-label". A Label will render its body, if it has one. However, in most cases it will not have a body, and will render its field's label as its body. Remember, however, that it is the field label that will be used in any error messages. The Label component allows for client- and server-side validation error decorations.

Component Parameters
Name	Type	Flags	Default Prefix
clientId	String	Since 5.6.0	literal
clientId	Used to explicitly set the client-side id of the element for this component. Normally this is not bound (or null) and org.apache.tapestry5.services.javascript.JavaScriptSupport#allocateClientId(org.apache.tapestry5.ComponentResources) is used to generate a unique client-id based on the component's id. In some cases, when creating client-side behaviors, it is useful to explicitly set a unique id for an element using this parameter. Certain values, such as "submit", "method", "reset", etc., will cause client-side conflicts and are not allowed; using such will cause a runtime exception.
for	org.apache.tapestry5.Field	Required, Not Null	component
for	The for parameter is used to identify the Field linked to this label (it is named this way because it results in the for attribute of the label element).
ignoreBody	boolean		prop
ignoreBody	If true, then the body of the label element (in the template) is ignored. This is used when a designer places a value inside the label element for WYSIWYG purposes, but it should be replaced with a different (probably, localized) value at runtime. The default is false, so a body will be used if present and the field's label will only be used if the body is empty or blank.

Examples

Search.tml

<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd">
    <body>

        <t:form>
            <t:label for="search"/>
            <t:textfield t:id="search" size="50"/>

            <t:checkbox t:id="all"/>
            <t:label for="all">
                Include out of date records
            </t:label>

        . . .

</html>

This demonstrates that the Label can come before or after the form control element component (the TextField and Checkbox components). When a Label has a body, that takes precendence over the field's label, though the field's label is what's used in any error messages.

Notes

The Label component is very important for user accessibility. A user will be able to click on the label to move the cursor into the corresponding field.

The Label component supports informal parameters; this can be very useful for adding the accesskey attribute supported by most browsers.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Label()
- Method Summary
  - Methods inherited from class java.lang.
    , , , , , , , , , ,

- Constructor Detail
  - Label
```
public Label()
```

Class Label

Examples

Search.tml

Notes

Constructor Summary

Method Summary

Methods inherited from class java.lang.

Constructor Detail

Label