Beginners November 2010

beginners@lists.squeakfoundation.org

16 participants
14 discussions

How do I lock a Morphic GUI?
by Hannes Hirzel 04 Nov '10

04 Nov '10

Hello How do I lock a Morphic GUI so that the halos do not come up anymore? I do want to prepare an image for general users where cannot bring up something unusual. Is there a preference for this? Searching for 'lock' and searching for 'halo' did not bring up anything useful. How is it done programmatically? Regards Hannes

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OOP Question - adding methods to core classes
by Sean P. DeNigris 03 Nov '10

03 Nov '10

I'm talking to Ruby via XMLRPC using the XMLRPC package from SqS. The library has this heinous case statement: val caseOf: { [True] -> [^ self wrapVal: '1' type: 'boolean']. [true] -> [^ self wrapVal: '1' type: 'boolean']. [False] -> [^ self wrapVal: '0' type: 'boolean']. [false] -> [^ self wrapVal: '0' type: 'boolean']. } otherwise: [ (val class) caseOf: { [SmallInteger] -> [^ self wrapVal: val asString type: 'i4']. [Float] -> [^ self wrapVal: val asString type: 'double']. [String] -> [^ self wrapVal: (self normalize: val)]. [ByteString] -> [^ self wrapVal: (self normalize: val)]. [XMLRPCDateTime] -> [^ self wrapVal: val encodeISO8601 type: 'dateTime.iso8601']. [Array] -> [^ self wrapVal: (self encodeArray: val) type: 'array']. [Dictionary] -> [^ self wrapVal: (self encodeStruct: val) type: 'struct']. } otherwise: [ val isStream ifTrue: [^ self wrapVal: (Base64MimeConverter mimeEncode: val) contents type: 'base64'] ifFalse: "Unhandled type." [XMLRPCException signal: 'Unhandled type: ' , val className]. ]] I was thinking how beautiful this code could be if each class had it's own encode method, like: In method protocol *xmlrpc Symbol>>encodeForXmlRpc String>>encodeForXmlRpc etc. BONUS: if this was the case, extending for new types would be ridiculously trivial - just add the method to the type instead of trying to hook into large control structures, e.g. * so that a Symbol on the ST end is recognized as a Symbol on the Ruby side (ends up as a string right now) *so that I can talk to remote Ruby objects OTOH, I was concerned about cluttering the core classes. I've been going back and forth with this kind of thing since I came to Smalltalk, never got it resolved. What do you think? Thanks. Sean -- View this message in context: http://forum.world.st/OOP-Question-adding-methods-to-core-classes-tp3020788… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Isometric 2D (serious) games develoment on Squeak/Pharo
by Offray Vladimir Luna Cárdenas 02 Nov '10

02 Nov '10

Hi All, Long time without being here, so is nice to be back. For my last project I'm wondering about 2D isometric games and after some preliminary finding I would like to use may be Python/Pygame or Squeak(or Pharo). I have found enough information about game creation on Python, but not on Squeak, specially regarding 2D isometric games. The idea is that each player lives in a post-apocalyptic world where you need to re-create the world. For that you live in a bio-nano-tech "farm-lab" where you can create plants, animals, and other stuff and test how it works in a mini-ecosystem to prototype that possible word. You work off-line in your own farm-lab, but you can go on-line and trade designs with other players to create a shared world or make test with their stuff from/in their farms-labs. The game will be free software so people can create their own variations and is intended as a serious game[1] where you can play just for fun but also learn and work with other people solving real problems using games and simulation. [1] http://en.wikipedia.org/wiki/Serious_game I would like some advice about how Squeak/Pharo fists the problem of making and 2D isometric game about this idea with characters, chat support between them, networking, using external stuff not made with/in Squeak (like svg support or external libraries and programs) and so on (some times I think in this like Croquet ultralite). I'm some kind of ethernal newbie on a lot of Informatics themes (including programming), so learning curve is also important here. Thanks, Offray

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Problems running Pharo
by Douglas Naka 02 Nov '10

02 Nov '10

Hi everybody, I am having problems when executing the vm using the latin1 encoding. I am running it on Ubuntu 10.10. Aways when I open the file browser and I get this error: invalid utf8 input detected. -encoding latin1 But this error happens only in this OS. I have tested it in Ubuntu 10.04 LTS and I don't get this error. Does anyone can help me, please? Thanks Naka

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Beginners November 2010