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Problem with e4 save parts dialog [message #903562]

Fri, 24 August 2012 10:57

Markus Wiederkehr

Messages: 17
Registered: August 2012

Junior Member

Another problem I am having with the e4 "Select the parts to save"-dialog is this:

* mark a part as dirty
* close the part
* dialog appears (Select the parts to save)
* uncheck the item (thereby NOT saving the part)
* part disappears as expected

But then when I attempt to close the Window the same dialog appears again, asking me again if I want to save the (long gone) part. Apparently it is still lurking around somewhere, probably also causing a memory leak.

What's the right way to handle this properly?

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Re: Problem with e4 save parts dialog [message #903565 is a reply to message #903562]

Fri, 24 August 2012 11:07

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

If you want parts to get removed when closed you need to tell the system
to do so by adding a tag with the value of
EPartService.REMOVE_ON_HIDE_TAG else all the system does is to set the
toBeRenderer flag to false.

Tom

Am 24.08.12 12:57, schrieb Markus Wiederkehr:
> Another problem I am having with the e4 "Select the parts to
> save"-dialog is this:
>
> * mark a part as dirty
> * close the part
> * dialog appears (Select the parts to save)
> * uncheck the item (thereby NOT saving the part)
> * part disappears as expected
>
> But then when I attempt to close the Window the same dialog appears
> again, asking me again if I want to save the (long gone) part.
> Apparently it is still lurking around somewhere, probably also causing a
> memory leak.
>
> What's the right way to handle this properly?

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Re: Problem with e4 save parts dialog [message #903582 is a reply to message #903565]

Fri, 24 August 2012 12:19

Markus Wiederkehr

Messages: 17
Registered: August 2012

Junior Member

Thanks Tom, but what's interesting is that apparently the toBeRendered flag does get set to false without that tag.

I have this listener and it gets notified whenever I close one of my editor parts:

private final EventHandler closePartEventHandler = new EventHandler() {
	@Override
	public void handleEvent(Event event) {
		Object part = event.getProperty(UIEvents.EventTags.ELEMENT);
		boolean toBeRendered = (Boolean) event.getProperty(UIEvents.EventTags.NEW_VALUE);
		if (!toBeRendered && part instanceof MPart && profileEditors.containsValue(part)) {
			profileEditors.values().remove(part);
		}
	}
};

@PostConstruct
private void subscribe(IEventBroker eventBroker) {
	eventBroker.subscribe(UIElement.TOPIC_TOBERENDERED, closePartEventHandler);
}

@PreDestroy
private void unsubscribe(IEventBroker eventBroker) {
	eventBroker.unsubscribe(closePartEventHandler);
}

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Re: Problem with e4 save parts dialog [message #903591 is a reply to message #903582]

Fri, 24 August 2012 12:50

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Well that's what I said though I probably left an important part.

The only thing that happens if you are not setting this flag is that the
MPart's toBeRendered is set to false but the MPart IS NOT removed from
the MPartStack/MPartSash!

So when I said "removed" I meant removed from the MElementContainer and
not the UI which are 2 different things. The reason for this is mainly
because Views should be shown at the same position they've been hidden.

Tom

Am 24.08.12 14:19, schrieb Markus Wiederkehr:
> Thanks Tom, but what's interesting is that apparently the toBeRendered
> flag does get set to false without that tag.
>
> I have this listener and it gets notified whenever I close one of my
> editor parts:
>
>
> private final EventHandler closePartEventHandler = new EventHandler() {
> @Override
> public void handleEvent(Event event) {
> Object part = event.getProperty(UIEvents.EventTags.ELEMENT);
> boolean toBeRendered = (Boolean)
> event.getProperty(UIEvents.EventTags.NEW_VALUE);
> if (!toBeRendered && part instanceof MPart &&
> profileEditors.containsValue(part)) {
> profileEditors.values().remove(part);
> }
> }
> };
>
> @PostConstruct
> private void subscribe(IEventBroker eventBroker) {
> eventBroker.subscribe(UIElement.TOPIC_TOBERENDERED,
> closePartEventHandler);
> }
>
> @PreDestroy
> private void unsubscribe(IEventBroker eventBroker) {
> eventBroker.unsubscribe(closePartEventHandler);
> }
>

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