- Pharo-users - lists.pharo.org

how to get all the send to super?

by stepharo

Hi I would like to study the use of super. Any idea how I can query them? Stef

June 28, 2015

Re: [Pharo-users] [Ann] DragPanels: Floating palette windows with drag-and-drop in Morphic

by stepharo

Stefan It would be fun to see if you can implement the same in Bloc Stef

June 28, 2015

Re: [Pharo-users] [ OT ] About Encodings and Character Sets

by stepharo

Thanks sven this would have helped me when I wrote the chapter on seaside on encodings long time ago. I will really read it. Le 27/6/15 12:04, Sven Van Caekenberghe a Ã©crit : > This is a nice article: > > What Every Programmer Absolutely, Positively Needs to Know About Encodings and Character Sets to Work With Text > > http://kunststube.net/encoding/ > > Which refers to this well known article: > > The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) > > http://www.joelonsoftware.com/articles/Unicode.html > > Sven > > PS: in Pharo, the first part of this draft might help too: > > Character Encoding and Resource Meta Description > > http://stfx.eu/EnterprisePharo/Zinc-Encoding-Meta/ > > A newer version will be part of the upcoming book. >

June 27, 2015

Re: [Pharo-users] Data Week: A week long workshop on data visualization using Pharo and Roassal

by Offray Vladimir Luna CÃ¡rdenas

Hi Sebatian, Thanks for your questions and your interest. I will ask them below. The explanations tend to be detailed, so they can work also as English notes on the workshop and be more helpful to to you and people with similar inquiries (also because, as Gauss said, I have no time to write a shorter text :-P). They're complemented with links at the end of the mail. On 26/06/15 11:41, Sebastian Heidbrink wrote: > Hi Offray, > > I started a software night here in town and I was also thinking about > presenting the GTToolkit and Roassal to the crowd. > > You mentioned something that made made me wonder. > You said that even non programmers liked the language. > > How did you approach them? Did you give them prepared interface > implementations to Twitter and also a predefined GTToolkit browser > implementation? > Or did they just use the inspector? > I approach them with interactive documentation. I think that I can relate with non-developers because I'm one of them :-). Most of the non-developers don't look at ourselves in activities like making apps or websites, at least not as a primary interest or activity. But storytelling is a primary interest for us as humans and in a complex world, when they are factual stories, this is involving progressively data manipulation and/or visualization. So that's my rationale to approach non developers: lets create interactive documentation using a live moldable system: Pharo. For that I used my project grafoscopio[1][2] (which is my first Pharo project and stil pretty alpha). I explain to participants the software motivations, their incomplete status using a mind map[3], and the fact that the software will change during the workshop and we're going to be all part of it. After that here is how we proceed: 1. We install grafoscopio on a vanilla Pharo system, then we load the "docking bar" (by making GrafoscopioBrowser startDockingBar). The docking bar is a fixed reference point in the interface, similar to the ones found in Windows, Linux, Mac and Squeak, which comes handy when interface get cluttered with windows (kind of usual with Smalltalk) and it provides shortcuts for the functionality in Grafoscopio: Launch documents, Roassal Examples, Playgrounds and Transcripts, update the software, its prerrequisites and external tools, and help. 2. We start exploring the Roassal examples to get a glimpse of what is possible. 3. We browse the Pharo Tutorial (which is now a grafoscopio interactive document). Grafoscopio documents are a tree of two kinds of nodes: plain text and playgrounds. Playgrounds are updated automatically with any change on a grafoscopio node, so the participants can read and execute the code and made annotations on it about what is not clear. We start this as a solo activity and then we proceed to a collective reading of the Pharo Tutorial, with extended explanations and comments and then we use the Sven's elegant code blog post as a final collective interactive lecture to get used to the language [3a]. This is how we use the GT tools for the first time, by reading and executing playgrounds inside a document. 4. After that we work on a suggested problem that I called the silences map: visualizing the things that politicians *don't* answer to on twitter. For that we made some data scrapping using the techniques described at [4]. The difference is that we start with a single tweet as a reference and from a hand drawn mockup of how our visualization will look like. Then we go from data scrapping to code and to visualization interactively. The participants are really interested in code with this approach, even more that I have imagined at the design of the experience, which has been a nice surprise to me. I imagine that this is related with the use of interactive documents, and "data from the real world", which they can relate to. > What does one need to use Twitter as a base for a demo? A developer > account I guess? > We're using data scrapping and with particular accounts, as explained on [4] (which I think falls under fair use), so we don't need developer accounts. > How stable is Pharo of it comes to the usage by non Smalltalkers and > non developers? > I thought one might spent most of the time with explaining what which > tool is what not to use "just now!" Is stable, but have several issues: - Suddenly it become slow after running some examples of the elegant code examples[3a] I don't know if this is because Web Server is running after the 4 example "Set up an HTTP server that returns the current timestamp". - Cut and paste is not working uniformly in GTTools and from Firefox and Chrome on Linux. - My grafoscopio interface is not polite and is too alpha. In part limited by my own experience and knowledge, in part by what Glamorous Toolkit can done by default (no contextual submenus on the tree nodes, no automatic updates in the browser windows name after renaming it or in the panels after tagging a node as "code", no usual window menu on top every GT Browser window). - Coding to get minimal stuff working is fine for this group and you can understand the basics in this way, but can be intimidating for others. I don't know if telescope [5], could decrease the entry barrier for non-technical inclined people. Here we have a communication sciences student, a visual designer and a physicist with no much previous exposure to programming, but they're interested in the problem and the way we're using to solve it. I don't know it this can work with a more general public, without a two way conversation on the graphical objects and the code, instead of only from the former to the first one. May be something like Inventing on Principle by Bret Victor[6] could be the answer and I think that Pharo is an ideal environment to get Roassal working on this way. > > Is there any library or framework available on smalltalkhub.com that > you could recommend as a base for such presentation/workshop? > Yep, see the links at the end :-) > Thank you! > Sebastian > > Links ==== [1] http://mutabit.com/grafoscopio/ [2] http://smalltalkhub.com/#!/~Offray/Grafoscopio [3] http://mutabit.com/deltas/repos.fossil/grafoscopio/doc/tip/Docs/Es/Presenta… [3a] https://medium.com/concerning-pharo/elegant-pharo-code-bb590f0856d0 [4] http://mutabit.com/offray/static/blog/output/posts/visualizing-politiciansp… [5] http://rmod.inria.fr/web/software/telescope [6] https://vimeo.com/36579366 Hope this helps and don't hesitate to share further related questions or issues, Offray

June 27, 2015

Re: [Pharo-users] Displaying an image from a file

by Sven Van Caekenberghe

Here are two examples that contain elements of what you want: (ZnEasy getPng: 'http://pharo.org/web/files/pharo.png') asMorph openInWindow. (FileLocator workingDirectory filesMatching: '*.jpg') do: [ :each | (each withExtension: 'png') writeStreamDo: [ :out | each readStreamDo: [ :in | (PNGReadWriter on: out) nextPutImage: (JPEGReadWriter on: in) nextImage ] ] ] Seaside has file library objects that store images and other resources as methods. > On 27 Jun 2015, at 17:15, Laura Risani <laura.risani(a)gmail.com> wrote: > > Hi all, > How can i make a morph display an image from a file at my hd? How can i further "save" this image inside a class so to be ported via packages? > Thanks, > Laura

June 27, 2015

Re: [Pharo-users] Displaying an image from a file

by Peter UhnÃ¡k

As for the saving, you can also look at http://smalltalkhub.com/#!/~peteruhnak/IconFactory (or just browse ThemeIcons, which is already present in the image), which stores the images in methods as base64 strings. Peter On Sat, Jun 27, 2015 at 5:20 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > Just look at FileReference>>gtInspectorPngIn: > > To see the effect, inspect the a .png file reference. > > Cheers, > Doru > > > > On Sat, Jun 27, 2015 at 5:15 PM, Laura Risani <laura.risani(a)gmail.com> > wrote: > >> Hi all, >> How can i make a morph display an image from a file at my hd? How can i >> further "save" this image inside a class so to be ported via packages? >> Thanks, >> Laura >> > > > > -- > www.tudorgirba.com > > "Every thing has its own flow" >

June 27, 2015

Re: [Pharo-users] Displaying an image from a file

by Tudor Girba

Just look at FileReference>>gtInspectorPngIn: To see the effect, inspect the a .png file reference. Cheers, Doru On Sat, Jun 27, 2015 at 5:15 PM, Laura Risani <laura.risani(a)gmail.com> wrote: > Hi all, > How can i make a morph display an image from a file at my hd? How can i > further "save" this image inside a class so to be ported via packages? > Thanks, > Laura > -- www.tudorgirba.com "Every thing has its own flow"

June 27, 2015

Displaying an image from a file

by Laura Risani

Hi all, How can i make a morph display an image from a file at my hd? How can i further "save" this image inside a class so to be ported via packages? Thanks, Laura

June 27, 2015

Re: [Pharo-users] [ OT ] About Encodings and Character Sets

by Johan Fabry

> On Jun 27, 2015, at 07:04, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > PS: in Pharo, the first part of this draft might help too: > > Character Encoding and Resource Meta Description > > http://stfx.eu/EnterprisePharo/Zinc-Encoding-Meta/ > > A newer version will be part of the upcoming book. And to complete Svenâs mail, this newer version is available online: https://ci.inria.fr/pharo-contribution/view/Books/job/EnterprisePharoBook/l… :-) ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD lab - Computer Science Department (DCC) - University of Chile

June 27, 2015

[ OT ] About Encodings and Character Sets

by Sven Van Caekenberghe

This is a nice article: What Every Programmer Absolutely, Positively Needs to Know About Encodings and Character Sets to Work With Text http://kunststube.net/encoding/ Which refers to this well known article: The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) http://www.joelonsoftware.com/articles/Unicode.html Sven PS: in Pharo, the first part of this draft might help too: Character Encoding and Resource Meta Description http://stfx.eu/EnterprisePharo/Zinc-Encoding-Meta/ A newer version will be part of the upcoming book.

June 27, 2015