org.eclipse.rwt.lifecycle
Interface IWidgetLifeCycleAdapter
-
All Superinterfaces:
-
ILifeCycleAdapter
-
All Known Implementing Classes:
-
AbstractWidgetLCA
- public interface IWidgetLifeCycleAdapter
- extends
ILifeCycleAdapter
A stateless callback handler used by RWT to synchronize the client-side and
server-side state of a widget. Each widget type should provide its own
implementation of this interface.
-
Since:
- 1.0
-
See Also:
-
AbstractWidgetLCA,
WidgetLCAUtil
|
Method Summary
|
void
|
preserveValues
(
Widget widget)
Preserves the current state of the widget in order to be able to keep track
of changes. |
void
|
readData
(
Widget widget)
Reads request parameters and applies the state changes that are indicated
by the client to the widget. |
void
|
render
(
Widget widget)
Writes JavaScript code to the response that renders the changes that has
been made to the widget. |
preserveValues
public void preserveValues(
Widget widget)
- Preserves the current state of the widget in order to be able to keep track
of changes. This method is called after the Read Data phase but
before the Process Action phase of the request life cycle. Thus,
the client and server state is in sync. By preserving the current state of
the widget, it is later possible to identify the properties that have been
modified during the processing of the request.
Implementors can use the method
IWidgetAdapter.preserve(String, Object). As a rule of thumb, every
property that is written in render must be preserved in this
method.
-
-
-
Parameters:
-
widget - the widget, the properties of which are preserved
readData
public void readData(
Widget widget)
- Reads request parameters and applies the state changes that are indicated
by the client to the widget. This method is called during the
Read Data phase of the request life cycle.
-
-
-
Parameters:
-
widget - the widget to be processed
render
public void render(
Widget widget)
throws
IOException
- Writes JavaScript code to the response that renders the changes that has
been made to the widget.
-
-
-
Parameters:
-
widget - the widget to render changes for
-
Throws:
-
IOException
Copyright (c) Innoopract Informationssysteme GmbH and others 2002, 2008. All rights reserved.
