December 2014 - Pharo-users

[ANN] Dr. Geo 14.12
by Hilaire Dec. 21, 2014

Dec. 21, 2014

Dear fellow pharoers, I am please to announce release 14.12[1] of Dr. Geo is ready for download[2]. Main changes appeared in the script system: - script becomes first class citizen, understand defined as a Smalltalk class; script calculus/side effect is defined in the #compute method, - when building a script, the user first dictates the expected argument types, - when using a script, only objects matching these argument types are selectable, - the argument sent to a script instance are of type Costume, those from a script you can modify the visual property of the arguments (i.e. objects in the sketch), - a script menu is now present to quickly use a script (as for macro-construction) - the script system is incompatible with the previous one, sketch using script need to be rewritten. Thanks to read Hilaire [1] http://www.drgeo.eu/community/change-log#TOC-14.12 [2] http://www.drgeo.eu/download-install -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

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Spec: "pluggable" widgets / label-input layout?
by Daniel Lyons Dec. 20, 2014

Dec. 20, 2014

Supposing I have a domain model, Activity, which looks like this: Object subclass: #Activity instanceVariableNames: 'title cost' classVariableNames: '' category: 'PERT' Then I have the expected accessors for title and cost. I make a Polymorph dialog for editing one of these things like so: PolymorphEditActivity>>edit: anActivity | builder content dialog | activity := anActivity. builder := Smalltalk ui theme builder. content := builder newLabelGroup: { 'Title' -> (builder newTextEntryFor: self activity getText: #title setText: #title: help: 'The title of the activity'). 'Cost' -> (builder newTextEntryFor: self activity getText: #cost setText: #cost: help: 'The cost of the activity') }. dialog := builder newPluggableDialogWindow: 'Edit activity' for: content. ^ builder openModal: dialog. *First question*: how do I return a value from the dialog? Now the Spec version of this I have looks like this: ComposableModel subclass: #SpecEditActivity instanceVariableNames: 'activity titleLabel costLabel titleWidget costWidget' classVariableNames: '' category: 'PERT' SpecEditActivity>>initializeWidgets "Set up the widgets for the dialog" titleWidget := self newTextInput. titleLabel := self newLabel. costWidget := self newTextInput. costLabel := self newLabel. titleLabel label: 'Title:'. costLabel label: 'Cost:'. self focusOrder add: titleWidget; add: costWidget SpecEditActivity>>initializePresenter super initializePresenter. titleWidget whenTextChanged: [ :newText | activity title: newText ]. costWidget whenTextChanged: [ :newCost | activity cost: newCost ] Then on the class side of things, I have this layout: SpecEditActivity class>>layout <spec> ^ SpecLayout composed newColumn: [ :column | column newRow: [ :row | row add: #titleLabel; add: #titleWidget ]; newRow: [ :row | row add: #costLabel; add: #costWidget ] ]; yourself I make all the expected "getter" methods. I can see how to get the model value out: I do something like this: activityDialog := SpecEditActivity new openDialogWithSpec; yourself. activityDialog model activity I have two questions about the Spec side of the house: 1. The title/costWidget whenTextChanged: stuff. With Polymorph, I can just say, here's an object, here's the getter/setter, deal with it. Does Spec have anything like this, or do you have to do this manual data shuffling? Is there an example I can learn from? 2. This layout is a bit on the ugly side. I looked at the examples and saw usage of the expert layout with asking how tall a line is. Is that the best that can be done, or is there something more like Polymorph's label layout that can be used instead? Thanks for your time and patience! â Daniel Lyons

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How to open the Settings style dialog?
by Rafael Luque Dec. 20, 2014

Dec. 20, 2014

Hi all, I was reading about the Settings framework (Deep Into Pharo, chapter 5) and I don't find the way to popup the style dialog shown in Figure 5.11 in page 71 ( https://books.google.es/books?id=Qki8BQAAQBAJ&lpg=PA68&dq=pharo%20the%20sty… ). I'm using a Pharo 4 image. Thank you

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[ANN] WKHTML2PDF for Pharo
by Torsten Bergmann Dec. 19, 2014

Dec. 19, 2014

Need an easy way to convert HTML into PDF for printing? The project http://wkhtmltopdf.org can help you here. If you want to use it from Pharo just check out: http://smalltalkhub.com/#!/~TorstenBergmann/WKHTML2PDF This project allows you to easily use the library. First select the engine: HTML2PDFConverter useExecutable. or HTML2PDFConverter useLibrary. and then convert: HTML2PDFConverter convert: 'http://www.pharo.org' toFile: 'pharo.pdf' to get a printable version of the Pharo homepage. As ever docu is on the STHub project website. It uses NativeBoost to call the library and OSProcess to call the executable. Bye T.

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Re: [Pharo-users] New Pharo Collections
by dboeren Dec. 18, 2014

Dec. 18, 2014

Sounds like a great idea for a project. Off the top of my head, I would be interested in support for "slices" meaning taking being able to treat a subset of a larger OrderedCollection as its own OrderedCollection rather than using copyFrom:to: to create a duplicate object to work with. It seems to me that this would be a more efficient method and should not be difficult to implement I think. -- View this message in context: http://forum.world.st/New-Pharo-Collections-tp4796132p4796156.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Question about SUnit
by Demian Schkolnik Dec. 18, 2014

Dec. 18, 2014

Greetings. I have to do a bunch of tests, where the initial set up is quite costly (launching ROS system and a bunch of nodes). Therefore, I don't want to set it up each time before a test (like with the standard setUp function). How can I make it so that the setUp function is called only once overall before ALL tests? (And aditionally, so that the tearDown function is called only once after all tests have run?) Thank you all in advance, best,

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Re: [Pharo-users] New Pharo Collections
by Stephan Eggermont Dec. 17, 2014

Dec. 17, 2014

>The goal of my project is to make a new collections for Pharo Smalltalk. >We have a great plans about list of important collections, but we also need your opinion about them. >So, feel free to make your suggestions about collections which you want to be implemented. The most important changes for me with collections have to do with the change from 32 to 64 bit. When we'll be able to access more memory, it doesn't make sense any more to have a backing store that is a single array. The switching to a more advanced backing store can be done transparently based on the size. I'm also interested in hybrid forms of the classic data structures that take less memory. There are several that normally waste much memory on pointers (binary trees, double linked list, tries) And then of course a Judy Array. Stephan

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Re: [Pharo-users] PetitParser and PPBrowser in Pharo 3.0
by Stephan Eggermont Dec. 16, 2014

Dec. 16, 2014

Jan Kurs wrote: >Anyone experience with Athens can help with the first issue? TRLabelShape>>drawOn: seem to be somehow responsible, but I don't see into this :( Sure. The default fonts you ar easing are bitmap fonts. Roassal2 only works with FreeType fonts. If you open the settings, select appearance and open standard fonts, you'll probably see Bitmap DejaVu Sans. If you select one of the Source Code Fonts Predefined styles you might have better results. (Standard fonts are not updated correctly, you might have to close/open the Standard Font tree element for it to refresh). Stephan

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Problem with Spec icon
by Tommaso Dal Sasso Dec. 16, 2014

Dec. 16, 2014

I have a weird behavior building an interface with Spec. I have a window built with Spec, and I want to add a button that shows a dialog with some text. To display the dialog I use the following line: UIManager default longMessage: 'a text message' title: 'some title'. And I hooked this code to a widget through the #action: method. The problem is: If I use a ButtonModel, the code behaves correctly showing the dialog. If I use an instance of the class ImageModel to display an icon, the dialog is displayed but the interface "hangs", in the sense that the "ok" button won't close the dialog and every click would spawn a new dialog. I would like to use an icon because it integrates better with the interface. Do you know if it is a bug or if I am doing something wrong? Thanks, Tommaso P.s.: Steps to reproduce If you need a working example you can inspect the code on the bleeding edge version of ShoreLine Reporter by following these instructions: 1. download a recent Pharo 4 image; 2. open a workspace and run: ConfigurationOfShoreLineReporter loadBleedingEdge 3. trigger an exception (for example by running 3/0 in a workspace). 4. click 'Report' 5. click the '?' button on the right side of the window.

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About Pharo books
by stepharo Dec. 15, 2014

Dec. 15, 2014

Hi guys I spent a couple of days cleaning PharoForTheEntreprise. So do not stress if you chapters are not where they were used to be :). Here is what I did now there are three stages for Chapters: - Limbo (some notes) - WorkInProgress - ReadyForReviews At the end of this flow we are thinking about the following books: - Entreprise Pharo: a Web Perspective (Zinc, Neo.....) - Spec We decided to write a separate little book - Pharo: The Hidden Parts The ideas is to have many little chapters on not common aspects Stef PS: currently doing a pass on Smacc

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