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

[ANN] SelectEntity, a new widget for Spec
by Stephan Eggermont March 18, 2016

March 18, 2016

When using data entry applications, we often have to select one entity out of a large list. Spec provides the entryCompletion option for text fields for that. That works well for small lists When the number of different entities grows large however, or when we want to be able to add a new entity, the traditional solution is to combine an entry completion field with a button that opens a dialog. This is what SelectEntity provides. In addition, it supports limiting the choices shown based on the context in which the field is shown. https://vimeo.com/158063568 I've created a small demo application that can be found on smalltalkhub: Gofer it smalltalkhubUser: 'StephanEggermont' project:'Ancestry'; package: 'Ancestry'; load. It can be started with: ANPersonList new openWithSpec. Stephan Thanks to Peter Uhnak for the design comments & debugging

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OSSubProcess and image startup
by Norbert Hartl March 17, 2016

March 17, 2016

I have OSSubProcess installed because I use gitfiletree in pharo5. Everytime I start my image now I get the following dialog. Anybody knows this? Is this a bug and should be reported? thanks, Norbert

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Little how to
by stepharo March 17, 2016

March 17, 2016

Hi guys for the mooc I would like have a list of how to that students should look in the system and implement. The idea is to show to the participants that Pharo is open and that they can find information. For example, - extracting a sprite from a png file - access a time service of the web Now I would love to get your ideas and their solution. Stef

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[Mongo] Creating MongoTimeStamp
by Martin Dias March 17, 2016

March 17, 2016

Hi, This email is related to Mongo project [1]. As MongoDb documentation [2] states: "BSON has a special timestamp type for *internal* MongoDB use and is not > associated with the regular Datetype. Timestamp values are a 64 bit value > where: > - the first 32 bits are a time_t value (seconds since the Unix epoch) > - the second 32 bits are an incrementing ordinal for operations within a > given second." Now, our Mongo bindings [1] convert this MongoDb's internal type to Pharo's TimeStamp (i.e. the subclass of DateAndTime) with two problems: - it's a wrong: the 2 parts of 32 bits are converted as 64 bits of milliseconds - it produces a warning in latest Pharo [3]: TimeStamp has been removed so extension methods cannot be installed. That's why I'm creating MongoTimeStamp, and changing BSON marshaling from: BSON>>nextTimestamp ^self nextDateAndTime asTimeStamp to: BSON>>nextTimestamp ^MongoTimeStamp value: self nextInt64 (similar for writing). This solution was idea of Esteban and Norbert, and discussed in the issue tracker of Voyage [3]. Mongo talk team, please tell me if you don't agree. Regards, Martin 1. http://smalltalkhub.com/#!/~MongoTalkTeam/mongotalk 2: https://docs.mongodb.org/manual/reference/bson-types/#timestamps 3: https://github.com/estebanlm/voyage/issues/11

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How can we use Bootstrap mixin?
by stepharo March 16, 2016

March 16, 2016

Hi I read that it is not really good to use tbsContainer: and friend in seaside bootstrap and I would like to know - what are bootstrap mixin tags? - how do we use them? Stef

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Re: [Pharo-users] Support reading a JSON array with a schema
by Sven Van Caekenberghe March 16, 2016

March 16, 2016

Hi, Norbert made a good suggestion: > On 09 Mar 2016, at 11:13, Norbert Hartl <norbert(a)hartl.name> wrote: > > I'm using NeoJSON and was thinking about how to parse JSON arrays. Implementing web APIs you get often an array back instead of an object. NeoJSON does AFAIK not deal too well with the list case. I added something to ease the usage. [...] And I committed: === Name: Neo-JSON-Core-SvenVanCaekenberghe.33 Author: SvenVanCaekenberghe Time: 16 March 2016, 11:24:47.837176 am UUID: 34aac279-4fef-4476-9201-95a64efaea6f Ancestors: Neo-JSON-Core-SvenVanCaekenberghe.32 Added NeoJSONReader>>#nextListAs: as suggested by Norbert Hartl Added NeoJSONReaderTests>>#testArrayOfPointsUsingNextListAs === Name: Neo-JSON-Tests-SvenVanCaekenberghe.33 Author: SvenVanCaekenberghe Time: 16 March 2016, 11:25:04.185192 am UUID: 8f4620bc-d5f5-4b3a-aaf0-ee4b8b7a9ccf Ancestors: Neo-JSON-Tests-SvenVanCaekenberghe.32 Added NeoJSONReader>>#nextListAs: as suggested by Norbert Hartl Added NeoJSONReaderTests>>#testArrayOfPointsUsingNextListAs === So now you can simplify the following relatively common case: (NeoJSONReader on: '[ { "x" : 1, "y" : 2 }, { "x" : 3, "y" : 4 } ]' readStream) mapInstVarsFor: Point; for: #ArrayOfPoints customDo: [ :mapping | mapping listOfElementSchema: Point ]; nextAs: #ArrayOfPoints. with the simpler: (NeoJSONReader on: '[ { "x" : 1, "y" : 2 }, { "x" : 3, "y" : 4 } ]' readStream) mapInstVarsFor: Point; nextListAs: Point. Sven

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Beginner's question on morphs
by Markus Stumptner March 15, 2016

March 15, 2016

Hi, I'm trying to refamiliarize with Pharo again after a few years... trying to set up a simple game window that uses a very large scrollable game board with a huge image as the background, so that game pieces placed on that background would scroll in and out of view. Any hints as how to best set that up in Morphic? Thanks Markus

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Re: [Pharo-users] distributed peer2peer sharing app in Pharo
by stepharo March 14, 2016

March 14, 2016

I know that in squeak there was the project of Cees de Groot Tric on Squeaksource.I can send you the files I got.

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Magritte Tutorial [Draft]
by stepharo March 14, 2016

March 14, 2016

Hi guys Here is the ci of the magritte tutorial that I'm revising and collecting material for https://ci.inria.fr/pharo-contribution/view/Books/job/Magritte/lastSuccessf… If you want to add a chapter let me know. I will add the ticketCorner and/or conference registration one in the future. Stef

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Some info (was: How to access XML tag name?)
by monty March 14, 2016

March 14, 2016

To handle character data (the "b" in "<a>b</a>"), use characters:. But know it's sent multiple times for an element if its character data is separated by other markup like '<a>b<c/>d</a>' (the new comment explains this). SAX parsing usually ends up needing a stack to track elements and their character data and is tedious but more efficient than DOM. You can't use XPath without DOM, but there's XMLParserStAX, a newer alternative to XMLPullParser that supports building partial DOM trees. Like XMLPullParser, it treats the document as a stream of event (StAX) objects you can "pull" from using a stream protocol (next, peek, atEnd, and others), but it also has messages like nextNode to construct a DOM tree out of the next event(s). You can use XPath on that.

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