本文整理了Java中com.google.gwt.event.logical.shared.ValueChangeEvent.shouldFire()方法的一些代码示例，展示了ValueChangeEvent.shouldFire()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ValueChangeEvent.shouldFire()方法的具体详情如下：
包路径：com.google.gwt.event.logical.shared.ValueChangeEvent
类名称：ValueChangeEvent
方法名：shouldFire

ValueChangeEvent.shouldFire介绍

[英]Convenience method to allow subtypes to know when they should fire a value change event in a null-safe manner.
[中]方便的方法，允许子类型知道何时应该以空安全的方式触发值更改事件。

代码示例

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <T> the old value type
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <T> void fireIfNotEqual(HasValueChangeHandlers<T> source,
  T oldValue, T newValue) {
 if (shouldFire(source, oldValue, newValue)) {
  ValueChangeEvent<T> event = new ValueChangeEvent<T>(newValue);
  source.fireEvent(event);
 }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <S> The event source
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <S extends HasValueChangeHandlers<Date> & HasHandlers> void fireIfNotEqualDates(
  S source, Date oldValue, Date newValue) {
 if (ValueChangeEvent.shouldFire(source, oldValue, newValue)) {
  source.fireEvent(new DateChangeEvent(newValue));
 }
}

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <S> The event source
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <S extends HasValueChangeHandlers<Date> & HasHandlers> void fireIfNotEqualDates(
  S source, Date oldValue, Date newValue) {
 if (ValueChangeEvent.shouldFire(source, oldValue, newValue)) {
  source.fireEvent(new DateChangeEvent(newValue));
 }
}

代码示例来源：origin: net.wetheinter/gwt-user

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <S> The event source
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <S extends HasValueChangeHandlers<Date> & HasHandlers> void fireIfNotEqualDates(
  S source, Date oldValue, Date newValue) {
 if (ValueChangeEvent.shouldFire(source, oldValue, newValue)) {
  source.fireEvent(new DateChangeEvent(newValue));
 }
}

代码示例来源：origin: net.wetheinter/gwt-user

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <T> the old value type
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <T> void fireIfNotEqual(HasValueChangeHandlers<T> source,
  T oldValue, T newValue) {
 if (shouldFire(source, oldValue, newValue)) {
  ValueChangeEvent<T> event = new ValueChangeEvent<T>(newValue);
  source.fireEvent(event);
 }
}

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

/**
 * Fires value change event if the old value is not equal to the new value.
 * Use this call rather than making the decision to short circuit yourself for
 * safe handling of null.
 * 
 * @param <T> the old value type
 * @param source the source of the handlers
 * @param oldValue the oldValue, may be null
 * @param newValue the newValue, may be null
 */
public static <T> void fireIfNotEqual(HasValueChangeHandlers<T> source,
  T oldValue, T newValue) {
 if (shouldFire(source, oldValue, newValue)) {
  ValueChangeEvent<T> event = new ValueChangeEvent<T>(newValue);
  source.fireEvent(event);
 }
}