如何处理Eclipse RCP 4中的关闭选项卡

Question

我想在Eclipse RCP 4应用程序中的选项卡的“脉冲关闭”按钮时进行验证，如果某些验证失败，则防止关闭。

Answer 1

If you don't want to use part.setDirty(true) together with an ISaveHandler like greg-449 montioned, you could listen to the model events and correct things there. Something in the direction of this:

public class PreventCloseAddon {
    @PostConstruct
    public void init(final IEventBroker eventBroker, final EPartService partService) {
        EventHandler tbrHandler = new EventHandler() {
            @Override
            public void handleEvent(Event event) {
                if (!UIEvents.isSET(event))
                    return;
                Object element = event.getProperty(UIEvents.EventTags.ELEMENT);
                if (element instanceof MPart) {
                    MPart part = (MPart) element;
                    if (!part.isToBeRendered()) {
                        // ... validate here ...
                        part.setToBeRendered(true);
                        partService.activate(part);
                    }
                }
            }
        };
        eventBroker.subscribe(UIEvents.UIElement.TOPIC_TOBERENDERED, tbrHandler);
    }
}

You should be aware that the part will be rendered again with this code.