Beginners November 2008

beginners@lists.squeakfoundation.org

54 participants
49 discussions

RE: problem with text editor
by Alex Chi 25 Nov '08

25 Nov '08

Hi Herbert, Sorry for not being so clear. I'm trying to design a GUI using input field where user will input their name and the other part of the GUI is like another text field to display all the list of user input. Let's say user input name: Lisa and hit enter button, the GUI will display: List of user: Lisa If another user type in their name for example: Joan, then the screen will display: List of user: Lisa Joan I write the method on the enter button to display the text but the text is always replacing the old one instead of append it to the next line. Do you have any advise how to make this work? Thanks in advance. Regards, Alex Hello Alex, AC> I am trying to design my first GUI using text editor and AC> input field. But I'm a bit confuse on how to append the user input AC> text to text editor in the next line without replacing the current AC> value of text editor. this is not clear to me. AC> Basically I'm trying to list all the user input from input AC> field to the text editor, for example: AC> List of guest writer: AC> Lisa Lewis AC> Bert Hall AC> Sonya Gayle This looks like you want to use a PluggableListMorph. Search this list or the swiki for PluggableMorphsDemo.pr AC> Can I use WriteStream in my text editor method? Please give AC> me some enlightenment. Thank you. Actually I do not understand what you mean by a text editor. But yes for adding together lots of Strings Streams are a fast way. But your example looks like you want a Collection of Strings. If this doesn't help, please give some more examples.

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Hi there! (and my first problem)
by Filip Malczak 25 Nov '08

25 Nov '08

Hi, Im Filip, and Im new at squeak. Ive read 'Squeak by example', and now I try to make my first program. Ive already written in Pascal and a bit (really small bit) of C. Im from Poland, so my english can by not realy good. Now time for my problem: I wanna write a program to write notes on stave (for music). Later Im gonna add translating notes into tabulatures for guitar, and later - for flute. But I begin with just notes. I started from creating object 'Pieciolinia' which is stave (in polish). Then I found out I need some tool to change metrum (Im not sure if its the same in english and polish, its speed of song, written on begining of stave, just after treble clef). So I made class 'TempoButton' which is expected to contain 3 smaller buttons: gora, dol & strzalka. gora is top number of metrum, dol - bottom number and strzalka is button to show a list of usual metrums (you click it and you have a list). gora and dol should open FillInTheBlank and change itself captions to what is written by user, and strzalka should open a PopUpMenu with list of some metrums. Then I created class 'SkladowyButton' which is my version of Basic Button (I wasnt able to find out how to handle with it, so I tried to create new one. And I could make up my own outlook for button). Ive written some methods, but when I try to execute (do it with ctrl+d): but:=TempoButton new. but drawOn: World. I have debugger as on zrzut1.jpg (I send it). I send whole category (I fileOut'ed it with yellow button on Browser) 'Nuty' (it means 'Notes' in PL). I would be really pleased if anyone would try to help me. I dont expect you to give the whole code, but to show where is problem and what I should change. I just wanna learn (on school I do Pascal, and I know that on studies (next year) Im gonna start with Java and objects, so I try to learn). Oh, and last thing: I use Squeak added to Ubuntu 8.10 (ver 3.9). Of course I work on this Linux. I know that it propably wont mean anything important, cause I work on VM, but better to write too much than too little ;) -- Greeting: Filip GG: 2486889 mail: filet00(a)gmail.com

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closed and open interval
by Cédrick Béler 24 Nov '08

24 Nov '08

Hi Is there an existing data structure that allow to represent interval with either open or closed ends like [1 ; 10[. Thanks -- Cédrick

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Problem with text editor
by Alex Chi 24 Nov '08

24 Nov '08

Hi, I am trying to design my first GUI using text editor and input field. But I'm a bit confuse on how to append the user input text to text editor in the next line without replacing the current value of text editor. Basically I'm trying to list all the user input from input field to the text editor, for example: List of guest writer: Lisa Lewis Bert Hall Sonya Gayle Can I use WriteStream in my text editor method? Please give me some enlightenment. Thank you. Regards, Alex Chi

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SimpleSliderMorph target setting question.
by Tim Patti 24 Nov '08

24 Nov '08

Hi all, I've been stuck for a couple of days on trying to figure out how to properly set the target and setValueSelector of a SimpleSliderMorph. My intended target is an instance of a class that I created in the workspace and I assume the setValueSelector is what I use to send the value to a method in my instance of the class. si := SecondaryCoil. "make an instance of the class" si setTurns:10."set the turns to 10" Transcript show:getTurns."print the turns" The above code works in the workspace and transcript, but I cannot figure out how to point the SimpleSliderMorph target to my instance si. Tried all kind of combinations with no luck. I'd like to be able to use the slider to set the turns of the coil in my instance of SecondaryCoil. I have 4 books on Squeak but I must me missing something obvious here. Tim

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Re: SimpleSliderMorph target setting question.
by Jerome Peace 24 Nov '08

24 Nov '08

[Newbies] SimpleSliderMorph target setting question. *** >Tim Patti timpatti at yahoo.com >Fri Nov 21 01:34:21 UTC 2008 > >Hi all, I've been stuck for a couple of days on trying to figure out how to >properly set the target and setValueSelector of a SimpleSliderMorph. My >intended target is an instance of a class that I created in the workspace and >I assume the setValueSelector is what I use to send the value to a method in >my instance of the class. > See Torsten Bergmann's note for a progammatic way to set things. For a one off, in the field testing, sort of way... For classes with morphic representations you can: grab a slider from the parts bin Bring up its halo. Select the red menu. Make it stay up. Set the action selector to 'setTurns:'. Set the maximum and minimum range. Set truncation on to avoid fractional values. Sight target to select a target.* Play! *(If you are not offered this option, then you are using a sqeauk earlier than 3.9 without some essential targeting fixes. If thats the case Torsten's methods will still work.) >si := SecondaryCoil. "make an instance of the class" >si setTurns:10."set the turns to 10" >Transcript show: si getTurns."print the turns" > >The above code works in the workspace and transcript, but I cannot figure out >how to point the SimpleSliderMorph target to my instance si. Tried all kind >of combinations with no luck. In the workspace you can create the slider mySlider := SimpleSliderMorph new openCenteredInWorld . then mySlider target: si alternately from the workspace menu check the box for 'create textual references to dropped morphs'. Then drag your slider over and drop it on the window. > >I'd like to be able to use the slider to set the turns of the coil in my >instance of SecondaryCoil. > >I have 4 books on Squeak but I must me missing something obvious here. > >Tim > ***

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Coloring images with transparant parts
by Matthias Korn 22 Nov '08

22 Nov '08

Hi all, I have a .png or .gif image (e.g. an ImageMorph) with transparent parts (e.g. a circle where the outer part is transparent). I now want to have this one image and color it programmatically with other colors (e.g. the circle appearing in slight red, green, blue ...). Is this possible to do with Squeak/Morphic? How? Thanks, Matthias

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Newbie Image Blowout
by Tony Giaccone 22 Nov '08

22 Nov '08

Ok so this is kind of a Seaside Question, but also kind of a Newb question. I'm going to ask it here because I think it's mostly a newbie problem. I created a seaside app, that seemed to hang the smalltalk process. When I hit the URL the page never rendered, and the image seemed to freeze up. In fact it brought my Mac pretty much to it's knees. I assume some kind of infinite loop sucked up all the swap space. Subsequent restarts of the image showed the same behavior. In the end I seem to have ended up corrupting my image, by forcing a quit in the middle of a save that was taking forever. So now when I try to restart my Squeak/Seaside image, I get the message: Read failed or premature end of Image file. after that image, the Squeak process crashes. I think I'm kind of in a bad place. I've done development over the course of several days. Have I lost all that work? Is there any kind of journal file that might have changes to the image? How badly am I toasted when my image goes south like this? Should I be making copies of the image as an additional protection strategy? Tony Giaccone

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Nothing much [was: what is holding back Smalltalk?]
by Klaus D. Witzel 22 Nov '08

22 Nov '08

On Fri, 21 Nov 2008 00:02:47 +0100, Mark Volkmann <mark(a)ociweb.com> wrote: > I don't have a lot of experience with Smalltalk yet, but I really love > what I've seen so far. > > I'm curious what experienced Smalltalkers see as some of the reasons why > it doesn't attract more attention. Me thinks that the Smalltalk community is healthy and vibrant--it is "just" a community form one would not expect for Ruby or Python or Perl, etc. To get impression of my impression take a look at what *actually* happened during the *recent* months: - Exupery (native x86 methods) powers Huemul - Seaside (web++ framework++) powers GLASS - Hydra (multiple parallel .images) powers Croquet .images - Google hires developers with deep Smalltalk experience - two more gods to be worshipped in the VM temple ;) - Squeak powers NewSpeak - new book Squeak by Example (creative commons license) - port of OpenDBX to Squeak (still not on windoze) - port of Squeak/VM to "another" smartphone platform ;) - DrGeo made it to the XO (OLPC) - fresh new subcommunity Pharo - attempt? to port Moose (world class sw analysis) to Squeak - Google hires developers with deep Smalltalk experience - Squeak web site migrated to/powered by Aida/Web Squeak - 4 (four) projects run through 2008's Goggle Summer of Code - the "everybody needs it" Safara from GSoC as yet not in mainstream - the "everybody needs it" Squeak GTK from GSoC as yet not in mainstream - IBM builds Smalltalk IDE inside Eclipse - Google hires developers with deep Smalltalk experience - ESUG 2008 conference draws more attendands than ever That list is of course incomplete, for example one wants to add the many noobs who joined #squeak and the beginners mailing list. I do not think that *soo* much is holding back Smalltalk ;) /Klaus -- "If at first, the idea is not absurd, then there is no hope for it". Albert Einstein > I understand the issues with Smalltalk in the past related to license > costs and performance, but those have been addressed now. Have you tried > to convince someone to consider Smalltalk and failed to convince them? > Why do you think they rejected it? What improvements could be made to > current Smalltalk environments, especially Squeak, that might sway them? > > For me the biggest issue has been trying to run my code from outside > Squeak. This includes running Squeak headless to do something script- > like and configuring a GUI application to run in a way that doesn't > require the user to know they are running Squeak. Both of these are > supposedly possible, but very difficult to get right. > > --- > Mark Volkmann > >

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body tag in seaside
by Tony Giaccone 21 Nov '08

21 Nov '08

I've made a casual examination, and I can't quite figure out which component creates the body tag. Of course I want to be able to set the class, but what I'd really like is for someone to point me to a place where I can read about how to do this? Tony

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Beginners November 2008