org.zkoss.zul.impl
Interface DataLoader

All Known Implementing Classes:

GridDataLoader, ListboxDataLoader, LiveGridDataLoader, LiveListboxDataLoader

public interface DataLoader

DataLoader is used with Grid, Listbox, and Tree to handle data loading from model to server and then to client side.

Since:

5.0.0

Author:

henrichen

Method Summary

void	doListDataChange(ListDataEvent event) Handle event when ListDataEvent is fired from owner component.
int	getLimit() Returns the required visible limit size of the current loaded data chunk to be shown on the screen.
int	getOffset() Returns the requested visible offset of the current loaded data chunk.
Component	getOwner() Returns the associated owner component of this DataLoader.
java.lang.Object	getRealRenderer() Return the renderer to do rendering.
int	getTotalSize() Returns the total size of the data.
void	init(Component owner, int offset, int limit) Callback from the owner component and give a chance to initialize things.
void	reset() Callback from the owner component and give a chance to reset things.
void	setLoadAll(boolean b) Sets whether to always load all items from ListModel.
void	syncModel(int offset, int limit) Synchronizes the owner component to be consistent with the specified model.
void	updateModelInfo() Used to update some extra control information to the client.

Method Detail

init

void init(Component owner,
          int offset,
          int limit)

Callback from the owner component and give a chance to initialize things.

Parameters:

owner - the owner component of this DataLoader.

reset

void reset()

Callback from the owner component and give a chance to reset things.

getOwner

Component getOwner()

Returns the associated owner component of this DataLoader.

getOffset

int getOffset()

Returns the requested visible offset of the current loaded data chunk.

Returns:

the requested visible offset of the current loaded data chunk.

getLimit

int getLimit()

Returns the required visible limit size of the current loaded data chunk to be shown on the screen.

Returns:

the required visible limit size of the current loaded data chunk to be shown on the screen.

doListDataChange

void doListDataChange(ListDataEvent event)

Handle event when ListDataEvent is fired from owner component.

getTotalSize

int getTotalSize()

Returns the total size of the data.

Returns:

the total size of the data.

syncModel

void syncModel(int offset,
               int limit)

Synchronizes the owner component to be consistent with the specified model.

Parameters:

offset - the starting index of the range to do data synchronize.

limit - the size of the range to do data synchronize. -1 means the current range.

updateModelInfo

void updateModelInfo()

Used to update some extra control information to the client.

getRealRenderer

java.lang.Object getRealRenderer()

Return the renderer to do rendering.

setLoadAll

void setLoadAll(boolean b)

Sets whether to always load all items from ListModel.