Class CustomWidgetMapGenerator

java.lang.Object
  com.google.gwt.core.ext.Generator
      com.vaadin.terminal.gwt.widgetsetutils.WidgetMapGenerator
          com.vaadin.terminal.gwt.widgetsetutils.CustomWidgetMapGenerator

public abstract class CustomWidgetMapGenerator
extends WidgetMapGenerator

An abstract helper class that can be used to easily build a widgetset with customized load styles for each components. In three abstract methods one can override the default values given in ClientWidget annotations.

See Also:

WidgetMapGenerator

CustomWidgetMapGenerator

public CustomWidgetMapGenerator()

getLoadStyle

protected ClientWidget.LoadStyle getLoadStyle(Class<? extends Paintable> paintableType)

Description copied from class: WidgetMapGenerator

Returns true if the widget for given component will be lazy loaded by the client. The default implementation reads the information from the ClientWidget annotation.

The method can be overridden to optimize the widget loading mechanism. If the Widgetset is wanted to be optimized for a network with a high latency or for a one with a very fast throughput, it may be good to return false for every component.

Overrides:

getLoadStyle in class WidgetMapGenerator

Returns:

true iff the widget for given component should be lazy loaded by the client side engine

getEagerComponents

protected abstract Class<? extends Paintable>[] getEagerComponents()

Returns:

an array of components whose load style should be overridden to ClientWidget.LoadStyle.EAGER

getLazyComponents

protected abstract Class<? extends Paintable>[] getLazyComponents()

Returns:

an array of components whose load style should be overridden to ClientWidget.LoadStyle.LAZY

getDeferredComponents

protected abstract Class<? extends Paintable>[] getDeferredComponents()

Returns:

an array of components whose load style should be overridden to ClientWidget.LoadStyle.DEFERRED