[Pharo-dev] feenk log

Stephane Ducasse stepharo.self at gmail.com
Sat Nov 11 05:50:30 EST 2017


Nice explanation.
Aliaksei do you add it to the BLSpace class comment?

Stef

On Fri, Nov 10, 2017 at 10:36 PM, Aliaksei Syrel <alex.syrel at gmail.com> wrote:
> Hi Sean,
>
>> Why not `anElement simulateClick`?
>
>
> Good question :)
> We indeed evaluated a possibility to have (BlElement >> #simulateClick) but
> then decided to make BlSpace class to be responsible for that.
>
> First we should realise that when we simulate a click we do literally
> simulate user's action which is: mouseDown at some global coordinate in
> space and then mouseUp. A process of handing mouse down/up events involves
> some complex event processing in order to detect what should happen, for
> example, with currently focused element or if we need to send double-click
> event. It is a mouse processor who is responsible for all these actions and
> it belongs to Space (inst. var in space). Not to mention some weird cases of
> overlapped elements, elements with custom elevation (zIndex), custom
> mouseDown/up event listeners that do some work too...
> That is why it is definitely not enough just to send a plain BlClickEvent
> directly to the element. Instead, we should involve a space in the process
> and actually simulate it by pushing mouseDown and mouseUp events to the
> event queue.
>
> Next what we realised it the fact that it is not nice to always create a
> temporary space and add our element to it in order to simulate a click. What
> if an element is already added to the space, what if not?
> To wrap up, we decided that it should be a responsibility of the Space class
> to create a new temporary instance of itself, add an element to it, simulate
> click event and then delete itself. In order to show the intent and a
> process behind we decided that it would be a good idea to actually write a
> code like this:
>
> BlSpace simulateClickOn: element.
>
> In english it is quite nice:
>
> "dear space class, could you, please, simulate a click event on a given
> element?" It is a space who simulates event, not an element.
>
> P.S. Users can still send a BlClickEvent directly (informs 'click'):
>
> element := BlElement new.
> element addEventHandlerOn: BlClickEvent do: [ self inform: 'click' ].
> element fireEvent: BlClickEvent new
>
> Cheers,
> Alex
>
> On 10 November 2017 at 21:22, Sean P. DeNigris <sean at clipperadams.com>
> wrote:
>>
>> Tudor Girba-2 wrote
>> > - support for programatic testing of bloc mouse events:
>> > https://twitter.com/feenkcom/status/925672206763511808
>>
>> Why not `anElement simulateClick`?
>>
>>
>>
>> -----
>> Cheers,
>> Sean
>> --
>> Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
>>
>




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