Beginners October 2010

beginners@lists.squeakfoundation.org

19 participants
15 discussions

Is there a tandard way to attach context menus
by Herbert König 04 Nov '11

04 Nov '11

Hello all, is there a standard way to attach a context menu to a morph? It's fairly easy to do by checking for yellowButtonPressed and manually firing up a MenuMorph. But it is sufficient to implement #addCustomMenuItems:hand: to get an enhanced Halo menu while #addYellowButtonMenuItemsTo:event: and #hasYellowButtonMenu don't help. So is there a predefined way without everybody doing his own? Thanks, Herbert mailto:herbertkoenig@gmx.net

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Omnibrowser help
by Rob Rothwell 14 Aug '11

14 Aug '11

Are there some tips/documentation somewhere on getting the most out of the OmniBrowser? The MulitpleSelection browser looks interesting (sort of like the tabbed browser in VisualWorks), but I don't quite understand its behaviour and what method it decides to show in which pane when you move around or save changes. On the same topic, can anyone point me toward how I could add a new item to the class context menu in the OmniBrowser? I want to add a new template selection menu item (like "new class template" and "new trait template") because I have created a method that creates TWO classes at the same time for an Aida application (A domain model class AND its associated WebApp class). Thanks, Rob Rothwell

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Keyboard shortcuts in squeak (pharo)
by sserre 03 Jan '11

03 Jan '11

Hello, Normaly, I use vim or emacs and find usefull to not use the mouse when I code. I did not find any reference to the shortcuts used to manage windows, class browther ect, in Pharo. It should exist, some of them are show when I right clic (save, doit, printit...), but google did not help me to find more. Some shortcuts that I will find very usefull migth permit: - to change the window focus (change windows) - move between the parts of the class browser (packages, classes[instaces, ?, class, hierarchy, variables...], categories, methods, edition), - close tools, open tools (class browser, transcript, workspace...) There maybe exist an alternative class browser/editor that will permit such things? Shortly, does anyone have the same horror of rats than me :), and what solutions have you found? Thanks in advance. Sébastien

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How to give numbers/anything to my program?
by jon jonsen 30 Nov '10

30 Nov '10

Hello, I'm looking for a function like "cin >>" in C++. Because I want to type 2 numbers in the Transcript and that these two numbers are given to my program. Does anybody know where to get a list of the (most common) smalltalk-commands and a short description of them? Thanks -- GMX DSL SOMMER-SPECIAL: Surf & Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl

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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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Why mouseDown only called for the first morph?
by Clemens Eisserer 20 Oct '10

20 Oct '10

Hi, I am new to Squeak and I try to write a tic-tac-toe like game. I have a BorderedMorpth as board to which I add some EllipseMorphs as childs: > for: 1 to : ...... [ > child := OwnEllipseMoph new. > bordered addMoprh: child. > child bounds: xPos@yPos corner: (xPos+fieldSize-5)@(yPos+fieldSize-5). ] The result looks like the following image: http://93.83.133.214/morph.png All the EllipseMorphs are identical and change their color at mouseDown: > handlesMouseDown: evt > ^ true > mouseDown: evt > self color: Color green. > ^true The problem is that I only receive mouseDown on the first EllipseMorph I add. When I click on the other EllipseMorphs nothing happens. Any idea what the problem could be? Could it be the bound-setting confuses Morph's event handling? Thank you in advance, Clemens

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Transcript show dowsn't work from event handler
by Clemens Eisserer 19 Oct '10

19 Oct '10

Hi, Is there any reason why Transcript show doesn't work when called from an event handler? I have > Transcript show: 'Hello'; flush inside an onMouseDown handler method, and although the method is called (it changes the morph's color), nothing is printed in the Transcript-Window. If I call the same method from the main "thread" while constructing the UI, everything works as expected. Thank you in advance, Clemens

2 1

Monticello - Non Boolean error
by Sayth Renshaw 19 Oct '10

19 Oct '10

I was trying to load soup image using monticello browser. However I receive an error when pressing open to load "soup" It is a non boolean error. Not sure how that relates to what I am doing. I used two sets of info when trying to load soup. Registration 1 MCHttpRepository location: 'http://www.squeaksource.com/Soup' user: '' password: '' Registration 2 MCHttpRepository location: 'http://www.squeaksource.com/Soup' user: 'squeak' password: 'squeak' Here is a screenshot [IMG] http://i988.photobucket.com/albums/af10/Sayth_Renshaw/SoupSqueak.png[/IMG] It must relate to this mustBeBooleanIn: context "context is the where the non-boolean error occurred. Rewind context to before jump then raise error." | proceedValue | context skipBackBeforeJump. proceedValue := NonBooleanReceiver new object: self; signal: 'proceed for truth.'. ^ proceedValue ~~ false

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Squeak / Smalltalk classes
by Mike Vidal 12 Oct '10

12 Oct '10

HI, Does anybody know of any good beginner level online / distance ED Squeak / Smalltalk programming classes? Either free or for a small fee would be OK. Mike

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Beginners October 2010