qx.io.image
Class PreloaderSystem

java.lang.Object
  qx.core.Object
      qx.core.Target
          qx.io.image.PreloaderSystem

public class PreloaderSystem
extends Target

The image preloader can be used to fill the browser cache with images, which are needed later. Once all images are pre loaded a “complete” event is fired.

Constructor Summary

PreloaderSystem()
If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading.

PreloaderSystem(java.lang.String vPreloadList)
If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading.

PreloaderSystem(java.lang.String vPreloadList, java.lang.Object vCallBack)
If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading.

PreloaderSystem(java.lang.String vPreloadList, java.lang.Object vCallBack, java.lang.Object vCallBackScope)
If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading.

Method Summary

void	_check() Checks whether the pre loading is complete and dispatches the “complete” event.
void	start() Start the preloading

Methods inherited from class qx.core.Target

_dispatchEvent, addChangeSelectionListener, addChangeValueListener, addEventListener, addExecuteListener, addJavaEventListener, createDispatchChangeEvent, createDispatchDataEvent, createDispatchEvent, dispatchEvent, hasEventListeners, removeEventListener

Methods inherited from class qx.core.Object

_disposeFields, _disposeObjectDeep, _disposeObjects, base, dispose, get, getDisposed, isDisposed, reset, self, set, toHashCode, toString_

Methods inherited from class java.lang.Object

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

Constructor Detail

PreloaderSystem

public PreloaderSystem()

If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading. Otherwhise the pre loading has to be started manually using start().

PreloaderSystem

public PreloaderSystem(java.lang.String vPreloadList)

If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading. Otherwhise the pre loading has to be started manually using start().

PreloaderSystem

public PreloaderSystem(java.lang.String vPreloadList,
                       java.lang.Object vCallBack)

If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading. Otherwhise the pre loading has to be started manually using start().

PreloaderSystem

public PreloaderSystem(java.lang.String vPreloadList,
                       java.lang.Object vCallBack,
                       java.lang.Object vCallBackScope)

If the callback is provided the preloading starts automatically and the callback is called on completion of the pre loading. Otherwhise the pre loading has to be started manually using start().

Method Detail

_check

public void _check()

Checks whether the pre loading is complete and dispatches the “complete” event.

start

public void start()

Start the preloading