BlEvent>>fillFromTime: can fail if the BlTime passed as argument is nil

[plantec]

It can happen in case an element dispatch and event after it has been removed from its space.
The typical use case is a menu:

• clicking on a menu item can close its parent window (which can be a BlElement)
• clicking on a menu item can run some action comprising an event dispatching
• If the menu item action is run after the menu window is closed, then the menu item space is nil during the event dispatching

BTW: one should not have to use #fillFromTime: in application code
a developper should not have to take care of this low level requirement

[tinchodias]

@plantec Can't Toplo avoid sending fillFromTime:? The event's time: was not mandatory, and I think fillFromTime: didn't become mandatory.

(I did a pass on senders of fillFromTime: in "FillFromTimePass" branch and I realized I didn't do this question at first time)

[tinchodias]

@plantec I merged #739 and I think it closes this issue.

Now fillFromTime: tolerates receiving a nil as argument, it returns. Please try it in the Toplo use case. Anyway, it is strange to receive nil, no? this message shouldn't be sent if there is no space attached.

[plantec]

A graphic framework may need event timestamp. it should be filled at event send.
Now I again this kind of issue with mouse wheel event.
It occurs sometime when scrolling in infinite element.
see screenshot.
the event is frozen and frozenTime is nil.

[labordep]

Hi, same problem :( :

[tinchodias]

How do I reproduce this bug? I don't find it

[plantec]

With Toplo, open a ToListElement, as an example with example_SieveOnList2With_AllMethods and scroll with the mouse.
This bogue doesn't occur systematically. It occurs from time to time...