ValidationDecorator (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

AutofocusValidationDecorator, BaseValidationDecorator, ValidationDecoratorWrapper
```
public interface ValidationDecorator
```
Deprecated.
Deprecated in 5.4 with no replacement.

An object responsible for performing decorations around fields and field labels. The decorator is notified at intervals by the fields and labels. In most western languages (written left to right) the label will render before the field, so the properties of the Field may not be set yet (or may reflect a previous looping's rendering). It may be necessary to Heartbeat.defer(Runnable) defer any rendering} until after the Label and the Field have both had their change to initialize and render. Modern HTML and CSS, especially under HTML5 and CSS3, really makes this pointless; it is possible to handle all of these issues directly in the client. ValidationDecorator will be supported in Tapestry 5.4, but the default implementation will be changed to do nothing.

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`afterField(Field field)`	Deprecated. Invoked after the field has completed rendering itself.
`void`	`afterLabel(Field field)`	Deprecated. Invoked by `Label` after rendering itself.
`void`	`beforeField(Field field)`	Deprecated. Renders immediately before the field itself.
`void`	`beforeLabel(Field field)`	Deprecated. Invoked by a `Label` before rendering itself.
`void`	`insideField(Field field)`	Deprecated. Invoked at a point where the decorator may write additional attributes into the field.
`void`	`insideLabel(Field field, Element labelElement)`	Deprecated. Invoked after the label has rendered its tag, but before it has rendered content inside the tag, to allow the decorator to write additional attributes.

- Method Detail
  - beforeLabel
```
void beforeLabel(Field field)
```
    Deprecated.
    
    Invoked by a Label before rendering itself.
    
    Parameters:
    
    field - for this label
  - insideLabel
```
void insideLabel(Field field,
                 Element labelElement)
```
    Deprecated.
    
    Invoked after the label has rendered its tag, but before it has rendered content inside the tag, to allow the decorator to write additional attributes.
    
    Parameters:
    
    field - the field corresponding to the label
    
    labelElement - the element for this label
  - afterLabel
```
void afterLabel(Field field)
```
    Deprecated.
    
    Invoked by Label after rendering itself.
    
    Parameters:
    
    field -
  - beforeField
```
void beforeField(Field field)
```
    Deprecated.
    
    Renders immediately before the field itself. The field will typically render a single element, though a complex field may render multiple elements or even some JavaScript.
    
    Parameters:
    
    field -
  - insideField
```
void insideField(Field field)
```
    Deprecated.
    
    Invoked at a point where the decorator may write additional attributes into the field. Generally speaking, you will want to render informal parameters before invoking this method.
    
    Parameters:
    
    field -
  - afterField
```
void afterField(Field field)
```
    Deprecated.
    
    Invoked after the field has completed rendering itself.