DefaultSelectionModel (Google Web Toolkit Javadoc)

java.lang.Object
- com.google.gwt.view.client.SelectionModel.AbstractSelectionModel<T>
- - com.google.gwt.view.client.DefaultSelectionModel<T>

Type Parameters:
T - the data type of records in the list

All Implemented Interfaces:

HasHandlers, ProvidesKey<T>, SelectionChangeEvent.HasSelectionChangedHandlers, SelectionModel<T>
```
public abstract class DefaultSelectionModel<T>
extends SelectionModel.AbstractSelectionModel<T>
```
A convenience SelectionModel that allows items to be selected according to a subclass-defined rule, plus a list of positive or negative exceptions.

Nested Class Summary
- Nested classes/interfaces inherited from interface com.google.gwt.view.client.SelectionModel
  SelectionModel.AbstractSelectionModel<T>

Constructor Summary

Constructors
Constructor and Description
`DefaultSelectionModel()` Constructs a DefaultSelectionModel without a key provider.
`DefaultSelectionModel(ProvidesKey<T> keyProvider)` Constructs a DefaultSelectionModel with the given key provider.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`clearExceptions()` Removes all exceptions.
`protected void`	`fireSelectionChangeEvent()` Fire a `SelectionChangeEvent`.
`protected java.util.Map<java.lang.Object,java.lang.Boolean>`	`getExceptions(java.util.Map<java.lang.Object,java.lang.Boolean> output)` Copies the exceptions map into a user-supplied map.
`abstract boolean`	`isDefaultSelected(T item)` Returns true if the given item should be selected by default.
`boolean`	`isSelected(T item)` If the given item is marked as an exception, return the exception value.
`void`	`setSelected(T item, boolean selected)` Sets an item's selection state.

Methods inherited from class com.google.gwt.view.client.SelectionModel.AbstractSelectionModel
addSelectionChangeHandler, fireEvent, getKey, getKeyProvider, isEventCancelled, isEventScheduled, scheduleSelectionChangeEvent, setEventCancelled, setEventScheduled

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DefaultSelectionModel
```
public DefaultSelectionModel()
```
    Constructs a DefaultSelectionModel without a key provider.
  - DefaultSelectionModel
```
public DefaultSelectionModel(ProvidesKey<T> keyProvider)
```
    Constructs a DefaultSelectionModel with the given key provider.
    
    Parameters:
    keyProvider - an instance of ProvidesKey, or null if the item should act as its own key
- Method Detail
  - clearExceptions
```
public void clearExceptions()
```
    Removes all exceptions.
  - isDefaultSelected
```
public abstract boolean isDefaultSelected(T item)
```
    Returns true if the given item should be selected by default. Subclasses implement this method in order to define the default selection behavior.
    
    Parameters:
    item - an object of this SelectionModel's type
    
    Returns:
    true if the item should be selected by default
  - isSelected
```
public boolean isSelected(T item)
```
    If the given item is marked as an exception, return the exception value. Otherwise, return the value of isDefaultSelected for the given item.
    
    Parameters:
    item - the object
    
    Returns:
    true if selected, false if not
  - setSelected
```
public void setSelected(T item,
               boolean selected)
```
    Sets an item's selection state. If the item is currently marked as an exception, and the new selected state differs from the previous selected state, the object is removed from the list of exceptions. Otherwise, the object is added to the list of exceptions with the given selected state.
    
    Parameters:
    item - the object to select or deselect
    selected - true to select, false to deselect
  - fireSelectionChangeEvent
```
protected void fireSelectionChangeEvent()
```
    Description copied from class: SelectionModel.AbstractSelectionModel
    
    Fire a SelectionChangeEvent. Multiple firings may be coalesced.
    
    Overrides:
    
    fireSelectionChangeEvent in class SelectionModel.AbstractSelectionModel<T>
  - getExceptions
```
protected java.util.Map<java.lang.Object,java.lang.Boolean> getExceptions(java.util.Map<java.lang.Object,java.lang.Boolean> output)
```
    Copies the exceptions map into a user-supplied map.
    
    Parameters:
    output - the user supplied map
    
    Returns:
    the user supplied map

Class DefaultSelectionModel<T>

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.gwt.view.client.SelectionModel

Constructor Summary

Method Summary

Methods inherited from class com.google.gwt.view.client.SelectionModel.AbstractSelectionModel

Methods inherited from class java.lang.Object

Constructor Detail

DefaultSelectionModel

DefaultSelectionModel

Method Detail

clearExceptions

isDefaultSelected

isSelected

setSelected

fireSelectionChangeEvent

getExceptions