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我有AggregateValidationStatus一个IChangeListener. 每次我选择/更改和组件时都会调用侦听器，这是我需要的。validate()我唯一的问题是我必须MultiValidator在ChangeListener. 可悲的是，文档很少，我发现的内容对我没有帮助。

我的ChangeListener

final AggregateValidationStatus aggregateValidationStatus = new AggregateValidationStatus(
        dataBindingContext.getBindings(), AggregateValidationStatus.MAX_SEVERITY);
aggregateValidationStatus.addChangeListener(new IChangeListener() {
    public void handleChange(ChangeEvent event) {
        //Here I have to trigger the MultiValidator to return either OK or ERROR
        boolean formIsValid = true;
        aggregateValidationStatus.getValue();
        for (Object o : dataBindingContext.getBindings()) {
            Binding binding = (Binding) o;
            IStatus status = (IStatus) binding.getValidationStatus().getValue();
            if (!status.isOK()) {
                formIsValid = false;
            }

            Control control = null;
            if (binding.getTarget() instanceof ISWTObservable) {
                ISWTObservable swtObservable = (ISWTObservable) binding.getTarget();
                control = (Control) swtObservable.getWidget();
            }
            if (binding.getTarget() instanceof CalendarComboObservableValue) {
                CalendarComboObservableValue observable = (CalendarComboObservableValue) binding.getTarget();
                control = (Control) observable.getControl();
            }

            if (binding.getTarget() instanceof IViewerObservable) {
                IViewerObservable observable = (IViewerObservable) binding.getTarget();
                control = observable.getViewer().getControl();
            }

            ControlDecoration decoration = decoratorMap.get(control);
            if (decoration != null) {
                if (status.isOK() || status.matches(Status.WARNING)) {
                    decoration.hide();
                } else {
                    decoration.setDescriptionText(status.getMessage());
                    decoration.show();
                }
            }
        }
        if (saveBtn != null)
            saveBtn.setEnabled(formIsValid);
    }
});
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1 回答 1

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您AggregateValidationStatus对以下绑定的唯一聚合datBindingContext：

final AggregateValidationStatus aggregateValidationStatus = new AggregateValidationStatus(
    dataBindingContext.getBindings(), AggregateValidationStatus.MAX_SEVERITY);

MultiValidator不是附加到单个绑定而是附加到整个上下文。因此，如果您还希望自己AggregateValidationStatus监视MultiValidators，则应该使用不同的构造函数：

final AggregateValidationStatus aggregateValidationStatus = new AggregateValidationStatus(
    dataBindingContext, AggregateValidationStatus.MAX_SEVERITY);

这应该使MultiValidatorin的手动触发变得handleChanged非常流畅。

于 2017-10-10T07:58:26.343 回答