com.extjs.gxt.ui.client.data
Class BaseTreeLoader<M extends ModelData>

java.lang.Object
  com.extjs.gxt.ui.client.event.BaseObservable
      com.extjs.gxt.ui.client.data.BaseLoader<M,java.util.List<M>>
          com.extjs.gxt.ui.client.data.BaseTreeLoader<M>

All Implemented Interfaces:

Loader<M>, TreeLoader<M>, Observable

public class BaseTreeLoader<M extends ModelData>
extends BaseLoader<M,java.util.List<M>>
implements TreeLoader<M>

Default implementation of the TreeLoader interface.

Events:

BeforeLoad : LoadEvent(loader, config)

Fires before a load operation. Listeners can set the doit field to false to cancel the action.

• loader : this
• config : the load config

Load : LoadEvent(loader, config, result)

Fires after the button is selected.

• loader : this
• config : the load config
• result : the load result

LoadException : LoadEvent(loader, config, result)

Fires after the button is selected.

• loader : this
• config : the load config
• result : the load result

Field Summary

Fields inherited from interface com.extjs.gxt.ui.client.data.Loader

BeforeLoad, Load, LoadException

Constructor Summary

BaseTreeLoader(DataProxy<M,java.util.List<M>> proxy)
Creates a new tree loader instance.

BaseTreeLoader(DataProxy<M,java.util.List<M>> proxy, DataReader<M,java.util.List<M>> reader)
Creates a new tree loader instance.

BaseTreeLoader(DataReader<M,java.util.List<M>> reader)
Creates a new tree loader instance.

Method Summary

boolean	hasChildren(M parent) Returns whether the given model has children.
boolean	load() Loads the data using the current configuration.
boolean	loadChildren(M parent) Initiates a load request for the parent's children.

Methods inherited from class com.extjs.gxt.ui.client.data.BaseLoader

addLoadListener, getProxy, isReuseLoadConfig, load, removeLoadListener, setReuseLoadConfig

Methods inherited from class com.extjs.gxt.ui.client.event.BaseObservable

addListener, fireEvent, fireEvent, getFiresEvents, hasListeners, hasListeners, removeAllListeners, removeListener, setFiresEvents

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.extjs.gxt.ui.client.data.Loader

addLoadListener, load, removeLoadListener

Methods inherited from interface com.extjs.gxt.ui.client.event.Observable

addListener, fireEvent, removeAllListeners, removeListener

Constructor Detail

BaseTreeLoader

public BaseTreeLoader(DataProxy<M,java.util.List<M>> proxy)

Creates a new tree loader instance.

Parameters:

proxy - the data reader

BaseTreeLoader

public BaseTreeLoader(DataReader<M,java.util.List<M>> reader)

Creates a new tree loader instance.

Parameters:

reader - the data reader

BaseTreeLoader

public BaseTreeLoader(DataProxy<M,java.util.List<M>> proxy,
                      DataReader<M,java.util.List<M>> reader)

Creates a new tree loader instance.

Parameters:

proxy - the data proxy

reader - the data reader

Method Detail

loadChildren

public boolean loadChildren(M parent)

Description copied from interface: TreeLoader

Initiates a load request for the parent's children.

Specified by:

loadChildren in interface TreeLoader<M extends ModelData>

Parameters:

parent - the parent

Returns:

true if the load was requested

hasChildren

public boolean hasChildren(M parent)

Description copied from interface: TreeLoader

Returns whether the given model has children.

Specified by:

hasChildren in interface TreeLoader<M extends ModelData>

Parameters:

parent - the parent model

Returns:

true if the given parent has children, and false if it has no children

load

public boolean load()

Description copied from interface: Loader

Loads the data using the current configuration.

Specified by:

load in interface Loader<M extends ModelData>

Overrides:

load in class BaseLoader<M extends ModelData,java.util.List<M extends ModelData>>

Returns:

true if the load was requested