Beginners May 2006

beginners@lists.squeakfoundation.org

65 participants
84 discussions

FW: how to set the cursor position in TextMorph
by Ron Teitelbaum 10 May '06

10 May '06

-----Original Message----- From: squeak-dev-bounces(a)lists.squeakfoundation.org [mailto:squeak-dev-bounces@lists.squeakfoundation.org] On Behalf Of Frank Urbach Sent: Wednesday, May 10, 2006 6:30 AM To: squeak-dev(a)lists.squeakfoundation.org Subject: Re: how to set the cursor position in TextMorph Hi Celal, Better to know is what do you want to do. The accessor cursorWrapped: work very well and brings the curosor of the TextMorph to the right position. The little example below is how I try to get the answer on your question. "initialize the TextMorph" karl := TextMorph new openInWorld. karl contents: 'here comes the mouse'. "Show where the cursor is" Transcript show: karl cursor;cr. "result ==1" "change the position of the cursor" karl cursorWrapped: 6. "Show where the cursor is" Transcript show: karl cursor. "result == 6" Cheers, Frank -------- Original Message -------- Subject: how to set the cursor position in TextMorph (09-Mai-2006 19:47) From: Celal Ziftci <celalziftci(a)gmail.com> To: frank.urbach(a)schmees.com > Hi, > I am having problem in setting the cursor to a certain position in > TextMorph. I am trying the cursorWrapped: message, but it seems to be > not working (or I am misunderstanding its meaning). Any help or pointers > would be appreciated. > Thanks, > > - Celal Ziftci >

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FW: Beginners Unanswered Questions
by Ron Teitelbaum 10 May '06

10 May '06

_____ From: squeak-dev-bounces(a)lists.squeakfoundation.org [mailto:squeak-dev-bounces@lists.squeakfoundation.org] On Behalf Of Josh Gargus Sent: Tuesday, May 09, 2006 5:03 PM To: Ron(a)USMedRec.com; The general-purpose Squeak developers list Subject: Re: Beginners Unanswered Questions On May 9, 2006, at 2:03 PM, Ron Teitelbaum wrote: All, We have 4 questions still unanswered on the beginners list. If anyone can help answer a question that would be terrific. http://lists.squeakfoundation.org/pipermail/beginners/2006-May/000049.html the plugin works but there's plug in can someone explain? It's possible that the plugin isn't loaded at the time that 'Smalltalk listLoadedModules' is called. This applies also to built-in modules... a module listed in 'Smalltalk listBuiltinModules' will not be in the list of loaded modules unless it has been used. You can attempt to load the JPEGReadWriter2 plugin by evaluating 'JPEGReadWriter2 basicNew isPluginPresent ' Josh

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halt is cool !
by cdrick 10 May '06

10 May '06

Hi all I'm rediscovering halt and finding it excellent... So I just send this mail to see how people use it... etc etc... self halt allows to interurpt code and open a debuger then we're able: - to inspect all objects (really useful for objects that are not inspectable in a workspace like seaside component) - follow code message flow (over get to the new one - inside go in the sent message code - through enter code in a block) : it took me time to use it (nearly) properly - to code directly in the debugger ! (didn't do before but what a time saver ! I put self halt in some empty method and then you can write code (autocompletion works too :) ), then saving revert the current method that you can follow to see if it's doing what's expected :) :) really really great ! why I didn't use that before ;) Noury sent a mail about self haltOnce to avoid recursion First you should enable halt once (message setHaltOnce). More in category 'debugging-haltOnce' in Object. never used though ;) If you have any other remarks concerning the use of halt.. or other related "tool"... See you Cédrick

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Postgress Database connection
by cdrick 10 May '06

10 May '06

Hi again... I'm triing to connect to a remote postgres db without success... I've use several framework ***Jim-PostgresSql *** | client | client := PSQLClient new database: 'sup_prev'; user: 'web'. client establishConnection. client closeConnection. wich give an unknown message type $# (<- a square - maybe an encoding problem ?? ) aBiteArray(14) in PSQLBackendMessage class>>readFrom: with: ... class := FactoryClassDict at: id ifAbsent: [self error: 'unknown message type ', id printString, ' (', id asInteger printString, ')' ***After, I've tryed PostgresV2*** something like... ( with configuration done on the class side: buildDefaultConnectionArgs ) |conn| conn := PGConnection new. conn . conn startup. conn execute: 'select * from experiences'. conn terminate. ^ resultStream contents. I get an error saying connection not valid - isConnected returning false :s I probably missed something... ***After I tryied to use ODBC but without success too... :s I don't know the dns for postgres...*** Can anyone tell me wich tool(package) to use preferably with postgres ? because I'm a bit lost at the moment :). Also, if you see what are the problems in my connections attempts Thanks for all Cédrick

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How to get rid of objects...
by cdrick 10 May '06

10 May '06

Hi... I d like to know if there is a way to force garbage collection of objects (still referenced)... I often need that when triing to connect ot a database for instance... If it fails, the connection object is still in memory Thanks Cédrick

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Should all methods return a value?
by Charles D Hixson 10 May '06

10 May '06

I know that in some languages this matters, and in others it doesn't. E.g., in C if you return a value, the temporary must always be stored when the function is called, but in other languages it can be ignored, and in some languages if you don't intentionally return a value, the system will automatically create a value (usually nil) to return for you. Eiffel make a big deal about separating Commands from Queries, with very strict rules about which kinds of routines can do what kind of things. Presumably Squeak (and Smalltalk) is flexible here...but I haven't seen it documented anywhere. (Also, can anyone recommend a good tutorial that isn't graphics based? What I want to do right now is really more text oriented.) I got the two Mark Guzdial books, but that doesn't really cover much in any depth.

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TabbedBrowser
by David Brooks 10 May '06

10 May '06

Hi, Is there a TabbedBrowser out there somewhere? By that I mean a SystemBrowser with tabs. I love tabbed browsing in the web browser world (eg. Firefox) and would really like the functionality for coding in Squeak. Squeaking with my 19" monitor is fine, I can open a ton of standard SystemBrowsers, but on my laptop with its 12" screen, my real estate is diminished; hence the desire for tabs. If one doesn't exist anywhere, any suggestions as to how I would go about writing one myself? I looked around inside SystemBrowser and OBSystemBrowser and promptly got a headache. Being a beginner, it was all too much for me. I tried going about it by putting SystemWindows inside of a TabbedPalette, but that didn't turn out so well. Any suggestions (even just "give up") would be appreciated. Thanks! --David

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string translation - multi language application
by cdrick 10 May '06

10 May '06

Hi again... For my project, I need to have an application in french and spanish. Do you have advice for simple translation mechanism (only strings). I wanted to intercept the rendering of strings in seaside and then choose the proper one according to the session language. If missing I was thinking of opening a new component asking for the translation. Are there any patterns to know about translating ? Thanks for all Cédrick ps: Lukas told me once they use a special class TranslatedString that have the same interface as Strings, but consists of a collection of translated strings. I imagine there is a collection in a class variable, but how to create strings after ? explicitly like TranslatedString: 'default' french: 'defaut' spanish:...

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RE: Beginners Unanswered Questions
by Ron Teitelbaum 09 May '06

09 May '06

Hi Hernán, I tried this already and was really confused by it. I used a paste up and two text fields. I found the method valueAtCursor which returned the active text field, and by following what the code was doing with tab I found this method. I expected that setting the keyboard focus through an inspector that something would happen. Nothing did, even valueAtCursor didnt change. I noticed that moving my mouse stole the cursor but I figured that since valueAtCursor didnt change that it didnt work the way I expected it too and there was more to the story then I understood. There was a bunch of other code besides this method, so I figured there had to be an easier way! I would seem to me that having the mouse steal focus would be a disaster for forms and business UIs where using a mouse in most cases is not recommended is there a way to turn that off or disable it while in a Morphic? (Until another Morphic is selected) Is the answer for Marcus use MVC or wxSqueak? Thanks, Ron Teitelbaum _____ From: Hernan Tylim [mailto:htylim@gmail.com] Sent: Tuesday, May 09, 2006 4:21 PM To: Ron(a)usmedrec.com; The general-purpose Squeak developers list Subject: Re: Beginners Unanswered Questions Hi, about this one: On 5/9/06, Ron Teitelbaum <Ron(a)usmedrec.com> wrote: http://lists.squeakfoundation.org/pipermail/beginners/2006-May/000052.html how to set the focus on to a textMorph ActiveHand newKeyboardFocus: aTextMorph. ActiveHand is a global which points to the HandMorph instance of the active world (you can also access this instance from inside any Morph with Morph>>activeHand) BTW, when dealing with keyboard focus remember that Squeak has a "keyboard focus follows mouse" policy. So even if you are setting it up programatically any other morph might steal your keyboard focus. (try it with a browser, start typing inside the text pane and move your mouse to any of the upper lists). Regards, Hernán

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How to edit swiki @ gatetech.edu
by Randy Goldenberg 09 May '06

09 May '06

Hi, I'd like to add my name to this list of Squeak users at: http://minnow.cc.gatech.edu/squeak/1302 However, when I try to edit the page I'm prompted for a username and password. This seems to be the case for other pages in the swiki too, including the sandbox. Using the swiki "help" function, I haven't been able to find any information about how to obtain a username and password. How does one go about editing the swiki? Thanks, Randy

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Beginners May 2006