- Pharo-users - lists.pharo.org

MouseWheel events
by Matthieu Lacaton May 12, 2015

May 12, 2015

Hello everyone, I have a question about MouseWheel events in Pharo. On Linux, when I use the wheel of my mouse the event I get in return is an instance of MouseWheelEvent : *" [(606@633) mouseWheel Character arrowDown CTRL 33261828 nil] "* When I press "CTRL + ArrowUp" or "CTRL + ArrowDown" on my keyboard I get the same type of MouseWheelEvent. On the other side, on Windows XP, when I press "CTRL + ArrowUp" or "CTRL + ArrowDown" on my keyboard I also get a MouseWheelEvent but when I use the wheel of my mouse I get a Keystroke event : *" [keystroke '<Ctrl->'] "* with a keyValue of 30 for a mousewheel up and 31 for a mousewheel down. I am a bit confused about this : Shouldn't I get a MouseWheel event when i use the wheel and a keystroke when I use CTRL + Arrow ? Why is it different from Linux to Windows ? In both cases I used Pharo4 VM + a fresh pharo 4 image. Thanks, Matthieu

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Roassal-Woden dynamically change an element height without redrawing
by Lusa Nicolas May 11, 2015

May 11, 2015

Hi folks! I am working with Roassal-Woden and I want to dynamically change the size of an element already drawn and already added to my view. This could be overcome simply by drawing a new element on top of the current one but works only for bigger elements. What if I want to take the current one and simply change it? Here is what I thought would be working but it isn't: shape height: aValue. element changed. Where shape is my RWShape (a RWCube in my case) and element is the shape element (an RWElement). The curious thing is that this code is actually working for the color: shape color: aWDColor. element changed. Any tips on what is wrong about my code? Cheers, Nicolas

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Custom error class
by Mark Rizun May 11, 2015

May 11, 2015

Hi guys! I was wondering if there is a tutorial/chapter in books or smth to read about implementing custom error class properly. If not maybe there are some good examples already implemented, so I could learn by exploring them. Thanks in advance! Mark -- View this message in context: http://forum.world.st/Custom-error-class-tp4825693.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[ANN]: MixedNumberPrinter
by Sean P. DeNigris May 11, 2015

May 11, 2015

I wrote a little tool to print fractions/decimals as mixed numbers. Enjoy :) Gofer it smalltalkhubUser: 'SeanDeNigris' project: 'SeansPlayground'; package: 'MixedNumberPrinter'; load. Usage Examples: 1.25 mixedNumberString = '1Â¼'. "use special ASCII characters when possible" 1.125 mixedNumberString = '1 1/8' ----- Cheers, Sean -- View this message in context: http://forum.world.st/ANN-MixedNumberPrinter-tp4825615.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[ANN] Teapot 0.91
by Attila Magyar May 10, 2015

May 10, 2015

Hello, Teapot 0.91 released today. Teapot is micro web framework that focuses on simplicity and ease of use. Here's a summary of changes: - Routes and before/after filters may include conditions (see the example below) - Routes can be defined with /any:/ that serves as a wildcard matching any http method - Added /charSet:/ accessor to TeaResponse E.g. Teapot on GET: 'test' -> result; when: [:req | req accept = 'application/json']; start. More information: http://smalltalkhub.com/#!/~zeroflag/Teapot -- View this message in context: http://forum.world.st/ANN-Teapot-0-91-tp4825485.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Problem using Zinc in Pharo 4 (Moose 5.1)
by PBKResearch May 9, 2015

May 9, 2015

Hello I have been trying to use Soup class>> fromUrl: to access the contents of a web page. It halts with a message from Zinc about malformed UTF-8. The page displays perfectly in Firefox, so I copied the page source from there to a local file and tried to read it from there. Again a message from Zinc: 'Invalid utf8 input detected'. It's strange, because the page is not in UTF-8. The head contains: <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type">. I have tried to find how to specify the character set in reading files with Zinc, but without success.* If it's relevant, I am using Pharo4.0 Latest update: #40613, downloaded two days ago. The address of the web page is: http://kompakt.handelsblatt-service.com/ff/display.php?msgID=725164109 <http://kompakt.handelsblatt-service.com/ff/display.php?msgID=725164109&adr= peter(a)pbkresearch.co.uk> &adr=peter(a)pbkresearch.co.uk. Other pages from the same source are loaded and analysed with no problem. Processing this page seems to go off course as soon as it encounters the character code 246, which is a correct o-umlaut in ISO-8859-1. Any advice gratefully received. Peter Kenny *I would be happy with advice to RTFM, if someone would point out the relevant bit of the FM.

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initializeWith* and constructors
by Peter UhnÃ¡k May 9, 2015

May 9, 2015

It seems to me that Smalltalkers are not very fond of constructors and I can't comprehend why. If for example I want to create object X that _needs_ object Y, then I would have to make a Y accessor. X>>y: anY y := anY but this makes no sense as I can still change the `y` object at later date breaking everything. An alternative is having: X>>initializeWithY: anY y := anY. self initialize. X>>y: anY ^ self basicNew initalizeWithY: anY. However I see only 59 initializeWith* methods (in about 6 packages) compared to 2302 initialize methods. Thus I am deducing that doing this is not very common. Am I missing something or am I trying to unnecessarily constraint the user and I should just trustâ¢ him that he knows what he should use? As a user of an interface I would prefer not to have useless things available that would just break things. Thanks, Peter

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New fast path for proxy loading in Voyage
by Henrik Johansen May 9, 2015

May 9, 2015

Hi Esteban! As we talked about on IRC yesterday, I had hoped to employ the fast become discussed in http://forum.world.st/Igor-s-fast-become-for-CompiledMethods-in-Cog-td43455… <http://forum.world.st/Igor-s-fast-become-for-CompiledMethods-in-Cog-td43455…> to bring faster proxy loading untill Spur arrives. Sadly, it's not present in any current VM's, for reasons unknown*. Luckily, the alternative proposed by Levente in the original thread (http://forum.world.st/A-trick-to-speedup-become-but-not-becomeForward-tp370… <http://forum.world.st/A-trick-to-speedup-become-but-not-becomeForward-tp370…>) is appropriate for our case. As I don't have write-access to Voyage repo, I've attached the package with the changes (which work in both 3.0 and 4.0, but I assume not older, due to using the SlotBuilder for anon subclasses) The package comment contains a workspace doit for comparision, but long story short, for objects covered by the new fast path, you can now materialize more than million objects in the time it previously took to materialize five. Cheers, Henry *Need to check we aren't becoming primitive literals before being ok to include? Seriously? You can do ((StandardFileStream >> #primRead:into:startingAt:count:) literalAt: 1) at: 4 put: 34 to achieve the same that become apparently must at all costs guard against, does that mean we should also introduce the same kind of primitive fail check requirements to at:put:? I get that there are some objects you really don't want to become: due to VM linking them internally in various ways, but checks that apply to *certain instances* of a class, should be unneccessary, imho (or, better, done at the user site)

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Roassal multiline popupText ?
by phil＠highoctane.be May 8, 2015

May 8, 2015

I'd love to have multiline popupText. dsEvents := RTDataSet new. dsEvents interaction popupText: [ :point | 'coll: {1} - ts: {2} / {3} -- {4} - {5}' format: { key. (point ts asSeconds - start) printString. .... How can I do that? Looks like the thing is single line. TIA Phil

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Roassal Camp Smalltalk, July 12
by Alexandre Bergel May 8, 2015

May 8, 2015

Dear Colleagues and Friends, We are happy to announce we will organize a CampSmalltalk about the Roassal visualization engine, on _Sunday 12 July_. As far as we have seen, the interests are multiple. Here is a list of topics we will happy to work on: - Improving Grapher, our charting library - Fixing bugs, addressing recently uncovered issues (e.g., composite shapes) - HTML/JavaScript export Some participants have indicated a great interest in: - Port of Roassal on VisualWorks - Using Roassal on Gemstone If you wish to participate, get in touch with us. Since we will probably have a sponsoring of the event, it would be nice to know how many will attend to ease the logistic and the pizza ordering :-) Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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