October 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by CodeDmitry

You seem to have answered my question as I was revising it D: -- View this message in context: http://forum.world.st/Intro-to-Microsoft-COM-for-Smalltalkers-tp4917738p491… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Oct. 3, 2016

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by phil＠highoctane.be

On Mon, Oct 3, 2016 at 6:47 PM, CodeDmitry <dimamakhnin(a)gmail.com> wrote: > LOL (in GrowlMorph): > is: rect saneWithRespectTo: morphs > > ^(morphs anySatisfy: [ :morph | morph owner isNotNil and: [morph > bounds > intersects: rect]]) not > > for some reason I find this method name quite amusing :3 > There are interesting things in there indeed. "Intention revealing" enough? > > > Let me guess; > > 1. "World defer: aBlock." defers the event to be called as soon as > possible(not necessarily now). > Actually this works for any Morph in 5.0 Morph>>#defer: aValuable "aValuable will be executed in the next UI rendering cycle" self owner ifNotNil: [ self owner defer: aValuable] ifNil: [ UIManager default defer: aValuable ] UIManager (MorphicUIManager) will do this at one point (track implementers 'til class side in WorldState) defer: aValuable "aValuable will be executed in the next UI rendering cycle" self addDeferredUIMessage: aValuable. This will stick it in a queue: deferredUIMessages ^DeferredUIMessages ifNil: [DeferredUIMessages := WaitfreeQueue new]. and then, there is interesting black magic going on runStepMethodsIn: aWorld "Perform periodic activity inbetween event cycles" | queue nextInQueue| "If available dispatch some deferred UI Message" queue := self class deferredUIMessages. [(nextInQueue := queue nextOrNil) isNil] "<<---------------- here all is happening -------" whileFalse: [ nextInQueue value]. self runLocalStepMethodsIn: aWorld. "<<------------ step methods -----------------" "The multi-threaded global Transcript needs to be updated periodically and synchronously with the UI." Transcript stepGlobal. "<<------------ and *this* is some black magic for Transcript ----" Fun thing: stepGlobal " The superclass method Model>>step indicates a convention that might be used to interoperate synchronously with the UI-thread. However when multiple Transcript windows are open, their PluggableTextMorphs share a single instance, from the global Transcript. To avoid potential trouble, this method should not be named #step. As well, we need this method to execute even when no Transcript windows are open, so the stream continues to be reset periodically, otherwise it would grow indefinitely. So this method is invoked from WorldState>>runStepMethodsIn:. " "Next three lines required temporarily to initialize instance variables added to existing instance" deferredClear ifNil: [ deferredClear := false ]. deferredEndEntry ifNil: [ deferredEndEntry := false ]. stepContents ifNil: [ stepContents := '' ]. deferredClear ifTrue: [ deferredClear := false. stepContents := ''. self changed: #clearText. ]. deferredEndEntry ifTrue: [ deferredEndEntry := false. self critical: [ stepContents := stream contents. stream resetContents. ]. self changed: #appendEntry. ]. Just in case one was wondering how Transcript clear actually works, check this: clear " Clear all characters by resetting the stream and voiding any previously flagged deferredEndEntry. Redisplays the view by signalling for #step to send #changed: . " self critical: [ deferredClear := true. "<------- magic! -------" deferredEndEntry := false. "<------- more magic!--------" stream reset ] Good luck to infer that from scratch. > 2. "[Block] fork" is called immediatly, but on a new thread. > Yeah, use forkNamed: aString if you actually want to track the thing easily in the Process Browser. > 3. "<number> <time unit> wait" blocks the current thread for specific time > before continuing. > Right. > > Now rearrange it into: > > [ > 10 seconds wait. > World defer: [ > Transcript show: 'Hello, World!'. > ]. > ] fork. > > Into > > do: aBlock after: nanoTime > [ > 10 seconds wait. "<------- you need to say something like > nanoTime asNanoSeconds wait. But careful as Delay works up to milliseconds > I think, so 5 asNanoseconds asSeconds will just be zero" > World defer: aBlock. "<-- OK, World is a WorldMorph, wich extends > PasteUpMorph, the old World class in Pharo 3.x" > ] fork. > > I guess that all of this shows that there is some flexibility in Pharo async. Check the Generator class for some brain twisting with fork. Run Generator examplePrimes. for a start. Phil > > > -- > View this message in context: http://forum.world.st/Intro- > to-Microsoft-COM-for-Smalltalkers-tp4917738p4917913.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > >

Oct. 3, 2016

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by CodeDmitry

LOL (in GrowlMorph): is: rect saneWithRespectTo: morphs ^(morphs anySatisfy: [ :morph | morph owner isNotNil and: [morph bounds intersects: rect]]) not for some reason I find this method name quite amusing :3 Let me guess; 1. "World defer: aBlock." defers the event to be called as soon as possible(not necessarily now). 2. "[Block] fork" is called immediatly, but on a new thread. 3. "<number> <time unit> wait" blocks the current thread for specific time before continuing. Now rearrange it into: [ 10 seconds wait. World defer: [ Transcript show: 'Hello, World!'. ]. ] fork. Into do: aBlock after: nanoTime [ 10 seconds wait. World defer: aBlock. ] fork. -- View this message in context: http://forum.world.st/Intro-to-Microsoft-COM-for-Smalltalkers-tp4917738p491… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Oct. 3, 2016

Re: [Pharo-users] Pharo Association

by Esteban Lorenzano

weird, I just entered and changed some data of my account. only thing to remark is that on http://association.pharo.org/web/members <http://association.pharo.org/web/members>, where you have the login, âusernameâ is actually your registered mail. Esteban ps: about bountysource, I donât know :) > On 3 Oct 2016, at 18:23, Gabriel Cotelli <g.cotelli(a)gmail.com> wrote: > > Same here... probably some manual work is required. > > On Mon, Oct 3, 2016 at 11:52 AM, Esteban A. Maringolo <emaringolo(a)gmail.com <mailto:emaringolo@gmail.com>> wrote: > 2016-10-03 9:08 GMT-03:00 Marcus Denker <marcus.denker(a)inria.fr <mailto:marcus.denker@inria.fr>>: > > On 3 Oct 2016, at 08:59, John Pfersich <jpfersich(a)gmail.com <mailto:jpfersich@gmail.com>> wrote: > > I went to the Pharo Association web site (http://association.pharo.org <http://association.pharo.org/>) to > > change my profile, but I didn't find any way to alter it. Am I missing > > something? > > > > There seems to beb a problem with refresh. After logging in, go to > > http://association.pharo.org/web/members <http://association.pharo.org/web/members> and there should be menu entries > > for editing. > > > Also, I've been paying for BountySource Salt since January, and I'm > not in the list either. > > https://salt.bountysource.com/teams/pharo/supporters <https://salt.bountysource.com/teams/pharo/supporters> > > Regards! > > Esteban A. Maringolo > >

Oct. 3, 2016

Re: [Pharo-users] Pharo Association

by Gabriel Cotelli

Same here... probably some manual work is required. On Mon, Oct 3, 2016 at 11:52 AM, Esteban A. Maringolo <emaringolo(a)gmail.com> wrote: > 2016-10-03 9:08 GMT-03:00 Marcus Denker <marcus.denker(a)inria.fr>: > > On 3 Oct 2016, at 08:59, John Pfersich <jpfersich(a)gmail.com> wrote: > > I went to the Pharo Association web site (http://association.pharo.org) > to > > change my profile, but I didn't find any way to alter it. Am I missing > > something? > > > > There seems to beb a problem with refresh. After logging in, go to > > http://association.pharo.org/web/members and there should be menu > entries > > for editing. > > > Also, I've been paying for BountySource Salt since January, and I'm > not in the list either. > > https://salt.bountysource.com/teams/pharo/supporters > > Regards! > > Esteban A. Maringolo > >

Oct. 3, 2016

Re: [Pharo-users] Pharo on my Ubuntu laptop :3

by Dimitris Chloupis

You can install also my ChronosManager project from Package Browser if you want to take a look at a morphic custom sci fi GUI made mainly with imagemorphs and of course the necessary technomagic On Mon, Oct 3, 2016 at 12:04 PM CodeDmitry <dimamakhnin(a)gmail.com> wrote: > Sounds exciting, I've been trying to tweak the window buttons but couldn't > figure out where to look. > > > > -- > View this message in context: > http://forum.world.st/Pharo-on-my-Ubuntu-laptop-3-tp4917833p4917846.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

Oct. 3, 2016

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by phil＠highoctane.be

Case in point, I am submitting a proposal here: https://devfest.be/blog/posts/cfp/ That's Google tech event here. I proposed to showcase MDL in Pharo along with workshop. Let's see how it goes... Phil On Mon, Oct 3, 2016 at 4:43 PM, Offray Vladimir Luna CÃ¡rdenas < offray.luna(a)mutabit.com> wrote: > Hi, > > > On 02/10/16 17:13, phil(a)highoctane.be wrote: > > [...] > >> Use it whenever you can, it will force you to understand how to do real >> stuff with it properly. >> >> I do hackathons with it. https://hackernoon.com/hackapo >> st-how-hackathons-can-be-the-best-learning-tool-under-the- >> sun-9c97e567e0a5 >> >> > As complementary to the infrastructure, code standards, libraries and so > on, a needed contribution, from the social dynamics perspective, are > hachathons and workshops. We're making them regularly here (link at [1], in > Spanish), with a critical data/code literacy approach. Last week we have > our 5th edition and this week we're going to make an agile 6th edition. > > [1] http://mutabit.com/dataweek/ > > I found the Pharo community very open to contribution. The fast feedback > loop [2] is experienced here in a very visible way and most of the time the > community is welcoming (with notable few exceptions, "ad hominen" attacks > and poor argumentation, but also with a good self-correcting feedback from > the broader community). > > [2] http://www.slideshare.net/MarcusDenker/perfection-feedback- > loops-or-why-worse-is-better-65540840 > > So is not a perfect place, as any other, but you'll find a way of > contributing that is considered worthy and encouraged and even supported > with economical resources from Pharo Association / Consorcium from time to > time. > > Welcome here, you and your contribution ;-), > > Offray > > >

Oct. 3, 2016

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by phil＠highoctane.be

On Mon, Oct 3, 2016 at 3:00 PM, Thibault Raffaillac < thibault.raffaillac(a)inria.fr> wrote: > I am not very fond of event loops in general, because they imply "many > inputs, one output" (process all pending events, then update screen). > For Morphic this is fine, because it displays on one screen, refreshing > at/around its frequency. But there might be other screens, or > network-output, file-output, which have different refresh frequencies. Then > you would want to process input events as they trigger rather than storing > them in a queue, such that whichever output destination sees the most > up-to-date state of the program. > One upfront queue with several workers is the way to do this fast and in a scalable way. Nothing new under the sun, Tuxedo has been doing this for eons, as is any decent TP framework. https://en.wikipedia.org/wiki/Tuxedo_(software) Most of this has been rehashed a lot of times bringing nothing new to the table. Best closest thing for free would be RabbitMQ. Works fine. Even has an MQTT component, which makes it great for IoT. > Javascript has this cool function, requestAnimationFrame, which sets a > one-time callback right before the next redraw. In essence it is an output > event, allowing some form of reactive programming (no loop, only callbacks > on input and output). > Yes, this is a nice one. This guy uses it a lot to super good effect: https://www.livecoding.tv/killroy/ - e.g. https://www.livecoding.tv/killroy/videos/xy8P1-prototypes-and-experiments-j… > In Pharo we have InputEventFetcher>>registerHandler: which is great for > getting input callbacks, but nothing for output :/ > WorldState>>addDeferredUIMessage: is probably a closest match, yet it is > bound to Morphic, preventing experiments on UI/video games. > Any alternatives? > This? http://www.smalltalkhub.com/#!/~Guille/ReactiveExtensions Maybe this (but not the same thing really) https://github.com/SquareBracketAssociates/PharoLimbo/blob/master/Xtreams/X… For video games, well, the ususal update/render with framerate adjustment is the typical loop. If the render is too slow vs the expected one things are skipped, several updates for a render. And user input is picked at one point during the update bit. Not really the same as a windowed GUI. Note that Windows has a queue per app these days (in 3.x days, it was a single queue for all of Windows, which is why things froze a lot. Same as current Pharo). Note also that in Pharo, the InputEventFetcher etc is just the default way and one can have an image doing things otherwise. Display is the raw thing, primitives can do whatever, so if you feel like it, you can reinvent something fully different on the platform. > Thibault > > > Here is some interesting event loop stuff from Tcl. > > > > http://wiki.tcl.tk/2567 > > > > I wish we had some easy Tk UI building things in Pharo. > > > > Spec is okay but not intuitive. As it is the only thing that exposes the > > myriad of various Morphs we have and shields us (somewhat) from the > > underlying details, we have to use it, but its explorability is really > > detrimental to the livecoding side of Pharo. > > > > Phil > > >

Oct. 3, 2016

Re: [Pharo-users] Pharo Association

by Esteban A. Maringolo

2016-10-03 9:08 GMT-03:00 Marcus Denker <marcus.denker(a)inria.fr>: > On 3 Oct 2016, at 08:59, John Pfersich <jpfersich(a)gmail.com> wrote: > I went to the Pharo Association web site (http://association.pharo.org) to > change my profile, but I didn't find any way to alter it. Am I missing > something? > > There seems to beb a problem with refresh. After logging in, go to > http://association.pharo.org/web/members and there should be menu entries > for editing. Also, I've been paying for BountySource Salt since January, and I'm not in the list either. https://salt.bountysource.com/teams/pharo/supporters Regards! Esteban A. Maringolo

Oct. 3, 2016

Re: [Pharo-users] Intro to Microsoft COM for Smalltalkers

by Offray Vladimir Luna CÃ¡rdenas

Hi, On 02/10/16 17:13, phil(a)highoctane.be wrote: [...] > Use it whenever you can, it will force you to understand how to do > real stuff with it properly. > > I do hackathons with it. > https://hackernoon.com/hackapost-how-hackathons-can-be-the-best-learning-to… > As complementary to the infrastructure, code standards, libraries and so on, a needed contribution, from the social dynamics perspective, are hachathons and workshops. We're making them regularly here (link at [1], in Spanish), with a critical data/code literacy approach. Last week we have our 5th edition and this week we're going to make an agile 6th edition. [1] http://mutabit.com/dataweek/ I found the Pharo community very open to contribution. The fast feedback loop [2] is experienced here in a very visible way and most of the time the community is welcoming (with notable few exceptions, "ad hominen" attacks and poor argumentation, but also with a good self-correcting feedback from the broader community). [2] http://www.slideshare.net/MarcusDenker/perfection-feedback-loops-or-why-wor… So is not a perfect place, as any other, but you'll find a way of contributing that is considered worthy and encouraged and even supported with economical resources from Pharo Association / Consorcium from time to time. Welcome here, you and your contribution ;-), Offray

Oct. 3, 2016