VariableOwner (vaadin-server 8.21.0 API)

All Superinterfaces:

java.io.Serializable

All Known Subinterfaces:

LegacyComponent

All Known Implementing Classes:

ColorPickerPopup, CustomLayout, DragAndDropService, DragAndDropWrapper, LegacyWindow, MenuBar, Panel, UI, Upload, Window
```
@Deprecated
public interface VariableOwner
extends java.io.Serializable
```
Deprecated.
As of 7.0. Only provided to ease porting of Vaadin 6 components. Do not implement this directly, implement LegacyComponent.

Listener interface for UI variable changes. The user communicates with the application using the so-called variables. When the user makes a change using the UI the terminal trasmits the changed variables to the application, and the components owning those variables may then process those changes.

Since:

3.0

Author:

Vaadin Ltd.

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`changeVariables(java.lang.Object source, java.util.Map<java.lang.String,java.lang.Object> variables)`	Deprecated. Called when one or more variables handled by the implementing class are changed.
`boolean`	`isEnabled()`	Deprecated. Tests if the variable owner is enabled or not.

- Method Detail
  - changeVariables
```
void changeVariables(java.lang.Object source,
                     java.util.Map<java.lang.String,java.lang.Object> variables)
```
    Deprecated.
    
    Called when one or more variables handled by the implementing class are changed.
    
    Parameters:
    
    source - the Source of the variable change. This is the origin of the event. For example in Web Adapter this is the request.
    
    variables - the Mapping from variable names to new variable values.
  - isEnabled
```
boolean isEnabled()
```
    Deprecated.
    
    Tests if the variable owner is enabled or not. The terminal should not send any variable changes to disabled variable owners.
    
    Returns:
    
    true if the variable owner is enabled, false if not