Beginners April 2011

beginners@lists.squeakfoundation.org

38 participants
40 discussions

Can't enter class comment?
by Tim Johnson 12 Apr '11

12 Apr '11

Hi, Fresh 4.2 image. Opened Browser. Made a new category. Made a new class. Tried to change the class comment but can't. Can't, can't, can't. Can you? For me, it always goes back to "THIS CLASS HAS NO COMMENT!" What is going on? Thanks, Tim

4 4

"Holder" morph and drag-select
by Tim Johnson 11 Apr '11

11 Apr '11

Hi, I am wondering about the "Holder" morph. If I drag-select over it, it shrinks in size. But not if I drag-select from the right-bottom of it. To reproduce: drag a Holder morph onto the desktop. Hold down "shift" and left-click drag from below-and-left of the Holder. Drag part way into the holder and then let go of the mouse button. The holder should reduce its vertical size by some amount. Behavior becomes stranger if I first put a Rectangle into the Holder. Is this the desired behavior? Thanks, Tim

2 1

Re: [Newbies] Re: Randomness + Pause/Delay?
by michael rice 11 Apr '11

11 Apr '11

Here's the Etoys app. Load and press Go button and it will continue game where two players take turns randomly selecting a tower on which to place a blue or red block, each game concluding when both towers are topped with block of the same color. As you can see, redAction and blueAction appear to happen simultaneously. Ergo, the wish for a means to delay for a tick or two between the two actions. Michael --- On Sat, 4/9/11, Bert Freudenberg <bert(a)freudenbergs.de> wrote: From: Bert Freudenberg <bert(a)freudenbergs.de> Subject: Re: [Newbies] Re: Randomness + Pause/Delay? To: "A friendly place to get answers to even the most basic questions about Squeak." <beginners(a)lists.squeakfoundation.org> Date: Saturday, April 9, 2011, 6:33 AM Well, often in Etoys you need a slight shift in perspective to make the solution fit a lot better. Approaches from other systems do not always map well. E.g., a typical approach to implement PacMan would be to have PacMan object with a script to eat peas. In Etoys it's a lot easier for each pea to have a script checking if it was eaten. So if you could let us know, in high-level terms, what the intended behavior is, we might be able to come up with ideas how to do that in Etoys. - Bert - On 08.04.2011, at 21:40, michael rice wrote: Thanks. One forgets it's not a real-time simulation. Michael --- On Fri, 4/8/11, David Corking <lists(a)dcorking.com> wrote: From: David Corking <lists(a)dcorking.com> Subject: Re: [Newbies] Re: Randomness + Pause/Delay? To: "A friendly place to get answers to even the most basic questions about Squeak." <beginners(a)lists.squeakfoundation.org> Date: Friday, April 8, 2011, 2:01 PM On Thu, Apr 7, 2011 michael rice wrote: > > But the two scripts, blueAction and redAction, in sequence, appear to happen simultaneously. > Is there a delay mechanism, like a marktime tile, that could separate two scripts by a specified > number of ticks? If not, are there any plans for one? I saw these two posts last year. They might help: http://lists.squeakland.org/pipermail/etoys-dev/2010-October/005888.html http://lists.squeakland.org/pipermail/etoys-dev/2010-October/005887.html -----Inline Attachment Follows----- _______________________________________________ Beginners mailing list Beginners(a)lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners

2 2

Re: Randomness + Pause/Delay?
by michael rice 10 Apr '11

10 Apr '11

I ported my morphic app to Etoys and it does indeed work differently (randomly) now each time I bring it up.. The app simulates a simple game with two players taking turns putting their colored blocks (blue and red) upon one of two towers, randomly selected. The game ends when both towers are topped with the same color. In a playfield, the playGame pseudocode script: TEST towers topped with same color blocks YES initialize game to starting conditions NO blueAction redAction But the two scripts, blueAction and redAction, in sequence, appear to happen simultaneously. Is there a delay mechanism, like a marktime tile, that could separate two scripts by a specified number of ticks? If not, are there any plans for one? Michael

4 7

Can I make a window outside of the "world?"
by Rick H. 08 Apr '11

08 Apr '11

Hi all. I'd like to make an operating system window, that can go outside of the "world." I found a nice Sample Image Viewer by Michael Davies. It uses a SystemWindow, but it also is constrained to be within the Squeak box. Do you understand what I am thinking of? Is it possible? Regards, Rick

5 6

Plumbin'
by michael rice 07 Apr '11

07 Apr '11

I managed to get Ward Cunningham's Plumbin' app running in MVC (v4.2). The source (PlumbinSrc.zip) can be downloaded from: http://c2.com/doc/plumbin/index.html but be aware of proper order of fileIns, Plumbin-Framework.st MUST be first. I don't think order is important for the rest of the fileIns. Also, I had to write a Faucet controller. For those interested in seeing this fine example of Smalltalk view tiling, here is the source for that controller (fileIn AFTER Plumbin-StandardTiles.st): 'From Squeak4.2 of 4 February 2011 [latest update: #10966] on 1 April 2011 at 10:48:53 am'! TileController subclass: #FaucetController instanceVariableNames: '' classVariableNames: 'YellowButtonMenu' poolDictionaries: '' category: 'Plumbin-Standard Tiles'! !FaucetController methodsFor: 'menu messages' stamp: 'ward 7/31/97 20:36'! off "Turn off the model's fluid flow." model off! ! !FaucetController methodsFor: 'menu messages' stamp: 'ward 7/31/97 20:36'! on "Turn on the model's fluid flow." model on! ! !FaucetController methodsFor: 'pluggable menus' stamp: 'mjr 4/1/2011 10:46'! getPluggableYellowButtonMenu: shiftKeyState ^ YellowButtonMenu! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! FaucetController class instanceVariableNames: ''! !FaucetController class methodsFor: 'as yet unclassified' stamp: 'mjr 4/1/2011 10:44'! "FaucetController initialize" initialize YellowButtonMenu _ SelectionMenu labels: 'turn on\turn off' withCRs lines: #() selections: #(on off)! ! FaucetController initialize! DoIt on "MosaicView openOn: (Mosaic example)" will open the app. I suggest putting the doIt text in a morphic workspace window and copying it from there before opening an MVC project, then copying it to an MVC workspace window to doIt, because keyboard processing in MVC will jumble up the characters if you try typing them to an MVC workspace at anywhere near normal speed. Tiles can then be moved about with the red (leftmost button) and duplicated with a shift red button. Faucet can be turned on/off with the yellow (rightmost) button (menu). Water drop on output spout will accordingly appear or disappear. Moving faucet (or spout) away from piping network will accomplish same. The pressure tank provides for water storage. It will only fill up if it has access to (on) faucet(s) and drain only when said faucet(s) are turned off, BUT the cursor MUST be over the pressure tank tile. The water drop on the spout will eventually disappear as pressure tank drains. Have fun. Michael

2 1

Randomness
by michael rice 07 Apr '11

07 Apr '11

I just noticed that when I load a morphic project I get the same stream of random numbers each time. Is there a simple way to install a new different random seed each time the project is loaded? Michael

5 13

Trace through calls
by Rick H. 07 Apr '11

07 Apr '11

Hello. I am trying to get a handle on how things are are called. I might like to make some changes to standard morphs for my own purposes. I can put the cursor on a morph, and inspect it, or debug it. Can I put the cursor on it and say "I want this morph, and all of its submorphs, to make a note on the Transcript each time a method is entered?" Regards, Rick

4 4

I've never written a line of code, but want to be a programmer!
by Tim Retz 06 Apr '11

06 Apr '11

I seem to be having a hard time finding any sort of smalltalk tutorial that doesn't assume I'm already a master programmer in some other language. ...That's not to say I haven't read, and executed examples from, a few of them. I've followed along with the laser game development guide by Stephan B Wessels (I can find a link if anyone wants it), I've read most of Squeak By Example and a few others, so I have explored enough for a basic understanding. My problem is that smalltalk is my first programing language, So I need to figure out how to break a problem down to something I can code out (I need to learn to "scratch-code" in a workspace). Does anyone know where I can find such a guide, or even outline one for me to build as I learn? On another note, I have tried to learn the "basics" of programing in other languages (most recently C++), but now that I've been exposed to smalltalk, it all seems cumbersome and scattered. I end up getting too frustrated with the need to reference some other part of the book so often, as well as the edit-compile-debug cycle. -- View this message in context: http://forum.world.st/I-ve-never-written-a-line-of-code-but-want-to-be-a-pr… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

11 13

Browser Font
by Erlis Vidal 05 Apr '11

05 Apr '11

Hi all, This is a simple question. Is it possible to change the font attributes on the Class Browser? On my machine the font is small and it would be nice to play with those options. Thanks, Erlis

4 6

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

Beginners April 2011