March 2014 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Phratch Website + version 3.0 in dev

by jannik laval

2014-03-19 15:34 GMT+01:00 Hilaire Fernandes <hilaire.fernandes(a)gmail.com>: > Great news! > > Le 19/03/2014 15:10, jannik laval a Ã©crit : > > - version 3.0 is the version in development. What is new here: Before > > this version Phratch was really slow. I am cleaning the code, and now it > > begins to be fast, really fast ! We also begun to write tests. > > I am curious. What did you finally find out for speed up? > Hum, some crappy things. For example, to manage the z-index of the bubble talk: - a loop to draw all the morph - a second loop that select the buuble (isKindOf: bubble !!!) and draw only the bubble. These two loops are in the same method and called on each step... for a bubble that appears only 1 or 2 times in an application Removing the second loop makes Phratch 2x faster. I am continuing to clean that. I also find the problem with click-event. Now when I click, it works fine ! Cheers, Jannik > > Hilaire > > > -- > Dr. Geo http://drgeo.eu > > > -- ~~Jannik Laval~~ Ãcole des Mines de Douai Enseignant-chercheur http://www.jannik-laval.eu http://car.mines-douai.fr/

March 19, 2014

Re: [Pharo-users] Phratch Website + version 3.0 in dev

by Hilaire Fernandes

Great news! Le 19/03/2014 15:10, jannik laval a Ã©crit : > - version 3.0 is the version in development. What is new here: Before > this version Phratch was really slow. I am cleaning the code, and now it > begins to be fast, really fast ! We also begun to write tests. I am curious. What did you finally find out for speed up? Hilaire -- Dr. Geo http://drgeo.eu

March 19, 2014

Phratch Website + version 3.0 in dev

by jannik laval

Dear all, I am pleased to announce Phratch website: www.phratch.com Thanks to the support of ESUG, it is possible to make visible this wonderful project. For now, what is available on the site: - a presentation of Phratch (you can refer to it now) - installation files, there is a portable version for Windows, Linux, MacOS. - tutorials - block documentation: generated from a Phratch image ! - Some elements for Jetstorm (a lot of new articles will come soon) - a category with news Now about the versions, I am developing the version 3.0 Why this number ? Why a third version in one year of work ? It is clear that a lot of work is already done. Each version represents strong changes in the architecture. - version 1.0 is the port of Scratch + BYOB + Panther in Pharo. It is working but not extendable. - version 2.0 makes Phratch really extendable. We can develop our own block for everything in Pharo. I also make Phratch more modular with the use of Pragmas for some menus, declaration of blocks... It is available only in Pharo 3.0. There are some languages available, I hope more people can translate in other languages (http://www.phratch.com/archives/612) - version 3.0 is the version in development. What is new here: Before this version Phratch was really slow. I am cleaning the code, and now it begins to be fast, really fast ! We also begun to write tests. I am really happy to have the support of ESUG and Pharo. Thanks to the community to make Pharo as usable as it it, it makes our dreams possible. Cheers, -- ~~Jannik Laval~~ Ãcole des Mines de Douai Enseignant-chercheur http://www.jannik-laval.eu http://car.mines-douai.fr/

March 19, 2014

Re: [Pharo-users] [ANN] ArchLinux pharo-vm / pharo-launcher packages

by Damien Cassou

On Tue, Mar 18, 2014 at 10:40 PM, Laurent Laffont <laurent.laffont(a)gmail.com> wrote: > you can now install pharo vm on Arch with: that's brilliant. Thanks. Can I reference your work in http://www.smalltalkhub.com/#!/~Pharo/PharoLauncher ? -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." Winston Churchill

March 19, 2014

Re: [Pharo-users] Calculate angle between two vectors (probably @Igor :)

by Igor Stasenko

On 16 March 2014 17:01, MartinW <wm(a)fastmail.fm> wrote: > Hello, > i probably made some embarassing mistake, but as i cannot find it, i ask > you > to have a look at this method. > It should calculate the angle between two vectors. And vectors are > instances > of Point (perhaps here is already a misconception?). > It is used in my flocking simulation PharoBoids > (http://smalltalkhub.com/#!/~MartinWalk/Boids) > > Here is my version of the method: > > angleBetween: vector1 and: vector2 onError: aBlock > | cosinusOfAngle innerProductOfVectors productOfVectorsLengths| > innerProductOfVectors := (vector1 dotProduct: vector2). > productOfVectorsLengths := (vector1 r) * (vector2 r). > productOfVectorsLengths = 0 ifTrue: [ ^ aBlock value ]. > cosinusOfAngle := innerProductOfVectors / productOfVectorsLengths. > ^ cosinusOfAngle arcCos > > > > But my Boids behave wrong when i use it. I found another implementation of > the same problem by Igor Stasenko which works and looks like this: > > angleBetween: p1 and: p2 ifDegenerate: aBlock > " Calculate an angle (in radians) between two vectors. > Evaluate a block, in case if calculation not possible because one of the > vectors has zero length " > > | x1 y1 x2 y2 dot2 n2 | > x1 := p1 x. > y1 := p1 y. > x2 := p2 x. > y2 := p2 y. > > dot2 := x1 * x2 + (y1 * y2). > dot2 := dot2 * dot2. > > n2 := (x1*x1 + (y1*y1)) * (x2*x2 + (y2*y2)). > > n2 = 0 ifTrue: [ ^ aBlock value ]. > > ^ (dot2 / n2) arcCos > > Can anybody explain the problem of my method? M. > > > yours looks correct. i'm just using squares to avoid taking square roots of vector lengths. > > -- > View this message in context: > http://forum.world.st/Calculate-angle-between-two-vectors-probably-Igor-tp4… > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > -- Best regards, Igor Stasenko.

March 19, 2014

[ANN] Pharo and ST books page (as another Seaside demo on PharoCloud)

by Torsten Bergmann

There are some free Smalltalk books collected by Stef in the past. http://stephane.ducasse.free.fr/FreeBooks.html Yet this page is often unknown to people. I therefore converted them to a more Seaside like demo using the Bootstrap project at: http://pharo.pharocloud.com/pharobooks as part of the Pharo/Seaside/Bootstrap demos at http://pharo.pharocloud.com Code for this is on http://smalltalkhub.com/#!/~TorstenBergmann/PharoCloud. I would suggest that we create a shortlink "books.pharo.org" for http://pharo.pharocloud.com/pharobooks to it - any takers? This way we can tell people: "Ahh you want to get Pharo, just use get.pharo.org" "Ahh you want to download Pharo, just use files.pharo.org" "Ahh you want to enhance Pharo, just use bugs.pharo.org" "Ahh you want to control Pharo, just use ci.pharo.org" and now "Ahh you want to learn Pharo, just use books.pharo.org" to be continued ... Kudos to Stef for the collection and to Mike for being able to host a demo on pharocloud. Have fun T.

March 19, 2014

Re: [Pharo-users] [Seaside] [ANN] Rickshaw.js charting library for Seaside

by Esteban A. Maringolo

I started walking this road of looking for the holy grail of charting libraries, and restricted my options to alternatives that are free and open source (this leaves Highcharts out of the equation, sadly), and based on D3.js. For RRD like graphics, there are some alternatives like Cubism [1], that I think are better suited. This is certainly a first attempt to have something usable, I'll need drilldown of my graphics, so probably I'll end up using something with Crossfilter[2], most likely dc.js [3], but wrapping that is a whole different story. Maybe before I need that, there will be a Roassal.js available, based on d3.js too :) Regards! [1] http://square.github.io/cubism/ [2] http://square.github.io/crossfilter/ [3] http://dc-js.github.io/dc.js/ Esteban A. Maringolo 2014-03-19 4:32 GMT-03:00 phil(a)highoctane.be <phil(a)highoctane.be>: > Oooh, very cool. > > I am in need of using some data from RRDs, this looks like pretty > interesting to me. > Anyone doing just that? > > Phil > > > > > On Wed, Mar 19, 2014 at 2:26 AM, Esteban A. Maringolo <emaringolo(a)gmail.com> > wrote: >> >> I just uploaded to SmalltalkHub an initial wrapper for the Rickshaw.js >> charting library (http://code.shutterstock.com/rickshaw/) >> >> As usual, you can load it with the following expression: >> >> Gofer it >> smalltalkhubUser: 'emaringolo' project: 'rickshaw'; >> package: 'ConfigurationOfRickshaw'; >> load. >> >> (Smalltalk at: #ConfigurationOfRickshaw) project development load: 'All' >> >> This will load all the packages, including a Seaside component >> installed at '/rickshaw' containing various examples. >> >> It is an initial version and my first package uploaded to >> SmalltalkHub, so bugs and and mistakes are expected :) >> >> Questions are welcome too. >> >> Regards, >> >> Esteban A. Maringolo >> _______________________________________________ >> seaside mailing list >> seaside(a)lists.squeakfoundation.org >> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside > >

March 19, 2014

Re: [Pharo-users] [ANN] Rickshaw.js charting library for Seaside

by Sven Van Caekenberghe

Super nice ! On 19 Mar 2014, at 13:41, Torsten Bergmann <astares(a)gmx.de> wrote: > Esteban A. Maringolo wrote: >> I just uploaded to SmalltalkHub an initial wrapper for the Rickshaw.js >> charting library (http://code.shutterstock.com/rickshaw/) > > Nice. I added a browsable demo of "Rickshaw" to > > http://pharo.pharocloud.com > > which is also directly accessible at > > http://pharo.pharocloud.com/rickshaw > > Thx > T. >

March 19, 2014

[ANN] Rickshaw.js charting library for Seaside

by Torsten Bergmann

Esteban A. Maringolo wrote: >I just uploaded to SmalltalkHub an initial wrapper for the Rickshaw.js >charting library (http://code.shutterstock.com/rickshaw/) Nice. I added a browsable demo of "Rickshaw" to http://pharo.pharocloud.com which is also directly accessible at http://pharo.pharocloud.com/rickshaw Thx T.

March 19, 2014

Re: [Pharo-users] What's wrong whith this code?

by PBK Research

Well I did some experiments, and I seem to have a solution. In the method Collection>>do:displayingProgress:every:, you will find (three lines from the end) the line: ifFalse: [ProgressNotification signal: '' extra: (oldLabel := newLabel)]. If you replace that with: ifFalse: [bar label: (oldLabel := newLabel)]. you will find that the examples of changing labels will work. I haven't tested this as thoroughly as I should, so there may be other consequences, but clearly this is where the problem lies. Peter Kenny _____ From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of PBK Research Sent: 19 March 2014 09:09 To: nicolaihess(a)web.de; 'Any question about pharo is welcome' Subject: Re: [Pharo-users] What's wrong whith this code? Note however that the first example used in the method comment, which displays a static label, does work. There is something wrong in the method of computing the changing label in the second example. I can't follow the code here, so I can't see the error, but it should be clear where to look. Peter Kenny _____ From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of Nicolai Hess Sent: 19 March 2014 08:56 To: Any question about pharo is welcome Subject: Re: [Pharo-users] What's wrong whith this code? 2014-03-19 8:17 GMT+01:00 Friedrich Dominicus <frido(a)q-software-solutions.de>: Bernat Romagosa <tibabenfortlapalanca(a)gmail.com> writes: > ouch, I added a . in the middle, sorry! > > elements := #('eins' 'zwei' 'drei' 'vier'). > elements > do: [ :element | (Delay forSeconds: 2) wait ] > displayingProgress: [ :element | 'Working on', element asString ]. > > 2014-03-18 9:55 GMT+01:00 Bernat Romagosa > <tibabenfortlapalanca(a)gmail.com>: > > Without having tried it, I think you're missing a #wait message in > there: > > > > elements := #('eins' 'zwei' 'drei' 'vier'). > elements do: [ :element | (Delay forSeconds: 2) wait ]. > > displayingProgress: [ :element | 'Working on', element asString ]. Sorry even with that I do not see the 'Working on ' message. It's just a progress bar with nothing else. No "Working on" anywhere. Regards Friedrich It doesn't work anymore. (This worked in Pharo 1.4) In the comment of Collection>>do:displayingProgress: is a example, that doesn't work: Smalltalk allClasses do:[:aClass| (Delay forMilliseconds: 1) wait] displayingProgress:[:aClass| 'Processing ', aClass name]. This should show the class names but it shows only a single progressbar.

March 19, 2014