Beginners July 2010

beginners@lists.squeakfoundation.org

14 participants
10 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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Collaboration with Squeak 2.8
by Clinton Blackmore 21 Aug '10

21 Aug '10

Greetings again. I'm hacking on Scratch, which is based on MIT Squeak, which is based on Squeak 2.8. I want to collaborate with others on a project. Monticello appears to require Squeak 3.1 or later. Is there a way for me to upgrade an image? If not, is there a sensible way to use a revision control system? It appears to me that: 1) collaborators could each create change sets, and e-mail them to each other, for every one to file in (which sounds like it would be confusing; surely I am not understanding something) or 2) every class in the code could be filed out into a directory, standard version control systems could be used, and then every class could be filed back in (which likewise seems daunting). What sort of workflows would you recommend? Cheers, Clinton Blackmore

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Good commenting style?
by Kannan Thambiah 02 Aug '10

02 Aug '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Squeakers, I've just been reading through the Laser Game Manual by Stephan B Wessels, and stumbled upon the section where he suggested a method for leaving notes, i.e. ToDos in the source code (http://squeak.preeminent.org/tut2007/html/035B.html ). He suggests to enhance the Object class with a new method "revisit: aString", that doesn't have a method body. Instead every subclass of Object where we want to leave notes, we'll just send us a message, e.g. "self revisit: 'I still need to think about a more effective algorithm here'". The trick is that now you can search for all senders of "revisit:" and have all your ToDos in one place. What do you think about this approach? Personally I dislike it. Though it is an interesting approach I somehow feel like cheating on the purpose of methods and messages. I don't know how to put it into better words, it just doesn't feel like neat, clean object oriented programming to me. What do you think? And, more important, how do you keep track of your ToDos? How do you keep them in your comments, and how do you make them available to yourself in an overview? Greetings, pygospa -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.11 (Darwin) iEYEARECAAYFAkxUH7sACgkQSspvMUAssY4ipQCcDtbuAA4ixx+15WKq+qc6y2Tg lgIAn2VrWRaslTgv4mSgRSb9KICnlJnp =eVRL -----END PGP SIGNATURE-----

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Anomaly of disappearing element in Bag?
by Vaidotas Didžbalis 30 Jul '10

30 Jul '10

Hello, Item "disappears" in Bag after contents of the item changes. Item is container with equality and hash is overridden. Is this a Bug? bag:= Bag with: (val := AKContainer value: 'a'). val value: 'b'. bag valuesAndCounts includesKey: val. "false in Trunk," set:= Set with: (val := AKContainer value: 'a'). val value: 'b'. set includes: val. "true" dictionary:= Dictionary newFromPairs: {val := AKContainer value: 'a'. 1}. val value: 'b'. dictionary includesKey: val. "true" All tests fails in Squeak 3.6 and in Dolphin ST. In Trunk fails only the Bag. If this is not a bug, how can I escape this Anomaly of disappearing element [1] Thank you Vaidotas [1] http://books.google.lt/books?id=W8_Une9cbbgC&pg=PA76&lpg=PA76&dq=anomaly+of…

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Anomaly of disappearing element in Bag? (2)
by Vaidotas Didžbalis 30 Jul '10

30 Jul '10

Sorry for previous post, Hello, Item "disappears" in Bag after contents of the item changes. Item is container with equality and hash is overridden. Is this a Bug? bag:= Bag with: (val := AKContainer value: 'a'). val value: 'b'. bag valuesAndCounts includesKey: val. "false in Trunk," set:= Set with: (val := AKContainer value: 'a'). val value: 'b'. set includes: val. "true" dictionary:= Dictionary newFromPairs: {val := AKContainer value: 'a'. 1}. val value: 'b'. dictionary includesKey: val. "true" All tests fails in Squeak 3.6 and in Dolphin ST. In Trunk fails only the Bag. If this is not a bug, how can I escape this Anomaly of disappearing element [1] Thank you Vaidotas [1] http://books.google.lt/books?id=W8_Une9cbbgC&pg=PA76&lpg=PA76&dq=anomaly+of…

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Connectors and Squeak 4
by Markus Schlager 14 Jul '10

14 Jul '10

Are Ned Konz's Connectors still available with Squeak 4? Markus

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Translation from old basic program
by kirand 05 Jul '10

05 Jul '10

Hi! Is anybody remember basic? I am a beginner and cant understand how to make this program in Smalltalk. I found it in old magazine from 80-th years :) So, this is the program. It makes interest graphics. 10 INPUT "Enter a number"; N 20 DIM X(N), Y(N) 30 R = 120 40 DT = 2 * 3,1416 /N 50 T = 0 60 FOR I = 1 TO N 70 T = T + DT 80 X(I) = 160 + R*COS (T): Y(I) = 125 - R*SIN (T) 90 NEXT I 95 CLSZ 100 FOR I = 1 TO N-1 110 FOR J= I+1 TO N 120 PLOT X(I), Y(I), 3 130 LINE X(J), Y(J) 140 NEXT J 150 NEXT I 160 STOP Some remarks can help. PLOT+LINE is BitBlt>>drawFrom:to:. DIM X(N), Y(N) is PointArray instance. If anobody make it pls give me a code to see how.

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[ANN] WorkspaceAsMethod package
by C. David Shaffer 02 Jul '10

02 Jul '10

My last post about this went "thud" :-) That's OK, I decided I'd just try it for a while. After two days I have to say that the idea of saving workspace contents to class-side methods is working pretty well so I published WorkspaceAsMethod to squeaksource. In Squeak 4.1 install with: Installer ss project: 'WorkspaceAsMethod'; install: 'WorkspaceAsMethod' >From the Workspaces class documentation: This class simplifies storing Workspace contents in class-side methods. Right now there is no UI support so you have to do things manually. Begin by creating a class to house your workspaces. Make it a subclass of me. In this example I'll call it TmpWorkspaces: Workspaces subclass: #TmpWorkspaces instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'WorkspacesDemo' Now create a new workspace by evaluating: TmpWorkspaces openNewWorkspaceSelector: #firstWorkspace label: 'First Workspace'. If you browse the TmpWorkspaces class you'll see a class-side method called firstWorkspace. This is where your workspace contents will be saved. Modify the workspace and 'accept' your changes. The class-side method will be updated accordingly. You can close the Workspace without fear of losing anything. To re-open it just: TmpWorkspaces firstWorkspace or TmpWorkspaces open: #firstWorkspace To open all workspaces just: TmpWorkspaces openAll. The #openAll method assumes that your workspaces are all in the method category 'workspaces' so if you move them they won't be opened by this selector. David

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Problems during the installation of Magma (squeak 4.1)
by Douglas Naka 01 Jul '10

01 Jul '10

Hi everybody, I'm new to squeak and smalltalk. I was trying to install Magma DB through Monticello, but I got some problems. I tryied two different ways to do it. First way: I ran the script Intalation code from this tutorial: http://wiki.squeak.org/squeak/2657. This way I got Magma installed, but when I run the tests almost all get error. Second way: I access the Magma repository (http://www.squeaksource.com/Magma) from monticello browser and installed MagmaTesterLoader. and when I run the tests almost all get error. I use: -squeak 4.1 (exactly the original image from squeak.org) -windows xp. Does anyone can help me, please? Thanks!

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Beginners July 2010