January 2013 - Pharo-dev - lists.pharo.org

[Pharo-project] Escape key to remove a debugger...
by Alexandre Bergel Jan. 2, 2013

Jan. 2, 2013

Hi! Pressing "Abandon" in a pre-debugger window is cumbersome. It would be cool to press esc to remove it. What would be the easy way to do this? Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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[Pharo-project] About morph layout
by Igor Stasenko Jan. 2, 2013

Jan. 2, 2013

Hi, just wanna share some ideas about how we can cleanup morph a bit. Layout.. bizarre. There are so many methods dedicated to laying out morphs that it easy to get lost. For me the main mystery and source of confusion is that there actually two different groups: - methods to control morph's own layout (in respect to its parent) - methods to control morph's children layout (something called layoutPolicy) the problem is that both APIs are found in single class, and most of them contain 'layout' word in it, so it is really hard to determine which one to use and when.. Over a years, i seen that people learned how to use existing functionality, without delving deep into implementation detail. But if you try to extend/change behavior (in your subclass), you will quite soon find out that it is really hard to tell with 100% certainty that the methods you override is the right place for your customization. Also, an important detail is extremely polluted protocol(s), making Morph a GOD class, with so many functions that it is unbearable. So, what i want to propose is same as i proposed to introduce for "SmalltalkImage" is to use "scoping" accessors , or "delegate" accessor to get access to part of functionality with clear context. Remember: Smalltalk vm version Smalltalk tools browser so, lets see how code might look like if we apply same approach to morph protocols: Example. Original: column := AlignmentMorph newColumn vResizing: #shrinkWrap; hResizing: #shrinkWrap; layoutInset: 1; borderColor: Color black; borderWidth: 0; wrapCentering: #center; cellPositioning: #center; color: Color white; yourself. Change: column := AlignmentMorph newColumn. column color: Color white. column layout shrinkWrap. "v and h both" column border width: 0; color: Color black. column childLayout inset: 1; wrapCentering: #center; cellPositioning: #center. Cons: - a code is a bit more elaborate. That because, of course, we cannot merge everything into single cascade. Pros: - from code it is clear, which properties belong to which parts of functionality. You cannot confuse, for instance, whether 'wrapCentering' property controls morph's own layout or a layout of its children - most important, we can considerably shrink Morph's protocol by removing all direct accessors and instead put them into delegated behaviors. More than that, a delegates don't need to be a dummy state holders (like most of properties are now), but actually an object(s) which conform to certain protocol.. For instance, if we have a 'border' as a delegate, and morph wants to draw it, it could just tell: MyMorph>>drawOn: aCanvas self border drawOn: aCanvas btw, then it is actually makes sense having a BorderedMorph subclass, which a) introduces 'border' delegate b) cares to draw its border in contrast to Morph who shouldn't. As well as in case of layouts, you can tell: morph layout changed. or morph childLayout layOutChildren. etc. -- Best regards, Igor Stasenko.

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[Pharo-project] UITheme builder, change newList list onButtonClick
by J. P. L. MartÃn Jan. 2, 2013

Jan. 2, 2013

Hello, I'm having trouble to figure out how to do this, I have a simple window with 3 buttons, each button should change the content listed on the list below them but I'm really not sure about how to do it. This is the code for the window: --- open "Abre la ventana principal del Sistema de Gestion Bibleotecaria" | builder contain | builder := UITheme builder. contain := builder newColumn: {builder newRow: { builder newButtonFor: self action: #onPrestamosClick label: 'Prestamos' help: ''. builder newButtonFor: self action: #onMaterialesClick label: 'Materiales' help: ''. builder newButtonFor: self action: #onSociosClick label: 'Socios' help: ''}. builder newColumn: { builder newListFor: self list: nil selected: nil changeSelected: nil help: '' }.}. (contain openInWindowLabeled: 'Babel') extent: 600@600. --- How should I define #onLabelClick to set the list to for example: Prestamo database. Thanks in advance.

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[Pharo-project] FOSDEM 2013 Smalltalk devroom
by Rafael Luque Jan. 2, 2013

Jan. 2, 2013

Hi Pharoers, I've noticed that FOSDEM 2013 will host an Smalltalk devroom like the previous year. Any idea about the scheduled sessions? I'd like to see tutorials related with Pharo, Seaside, Amber, Moose, etc. Thank you.

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[Pharo-project] Happy Pharoing and new years
by StÃ©phane Ducasse Jan. 2, 2013

Jan. 2, 2013

Hi Pharoers from all over the world. Even if it may look like an obligatory exercise, I really want to wish you a good 2013 year. I hope that you will get good business opportunities and success. For Pharo we achieved a lot in 2012: association 2.0 consortium bounties (websocketsâ¦.) new book coming soon Now we will continue there will be the pharo conference 2.0 release 3.0 alpha We really want to support you in your business so do not hesitate to let us know how we can improve and learn from your problems. Stef

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[Pharo-project] Nautilus with custom icons
by Torsten Bergmann Jan. 2, 2013

Jan. 2, 2013

How can one add a new custom icon for his own class (hierarchy) into Nautilus. I can add one with tricks in "ClassesIconsCache" in class AbstractNautilusUI. But is there a default extension mechanism similar to OB where one just implemented a method #browserIcon? Thx T.

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[Pharo-project] A tantalizing path of dealing with multiple concerns...
by Igor Stasenko Jan. 2, 2013

Jan. 2, 2013

areasRemainingToFill: aRectangle "Pushed up from BorderedMorph, all cases tested for there are supported by basic Morph." "Morphs which achieve translucency by other means than fillStyle will have to reimplement this" "Fixed here to test the fillStyle rather than color for translucency. Since can have a translucent fillStyle while the (calculated) color is not." self fillStyle isTranslucent ifTrue: [^ Array with: aRectangle]. self wantsRoundedCorners ifTrue: [(self borderWidth > 0 and: [self borderColor isColor and: [self borderColor isTranslucent]]) ifTrue: [^ aRectangle areasOutside: (self innerBounds intersect: self boundsWithinCorners)] ifFalse: [^ aRectangle areasOutside: self boundsWithinCorners]] ifFalse: [(self borderWidth > 0 and: [self borderColor isColor and: [self borderColor isTranslucent]]) ifTrue: [^ aRectangle areasOutside: self innerBounds] ifFalse: [^ aRectangle areasOutside: self bounds]] ... the whole Morphic code fall victim of rounded corners (and borders , of course). I wonder, is there any way to a) have multiple concerns b) at same time, have a clean code ? But i suspect that smalltalk is not powerful enough for that. :) -- Best regards, Igor Stasenko.

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[Pharo-project] [ANN] Fuel 1.8.1
by Torsten Bergmann Jan. 1, 2013

Jan. 1, 2013

Hannes Hirzel wrote: >Thank you for the announcment of Fuel. Where do I found the home page of it? AFAIK it is here: http://rmod.lille.inria.fr/web/pier/software/Fuel Bye T.

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[Pharo-project] [ANN] Fuel 1.8.1
by Max Leske Jan. 1, 2013

Jan. 1, 2013

We want to announce Fuel release 1.8.1. This release includes one fix: serialization / materialization of Date objects. The rest of the work went into making fuel work with as many images as possible. All tests run green. Supported and tested images: Pharo 1.1.1, 1.1.2, 1.2, 1.3, 1.4, 2.0 Squeak 4.1, 4.2, 4.3, 4.4 Have fun!

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[Pharo-project] Happy new year, to all of you!!!
by Alexandre Bergel Jan. 1, 2013

Jan. 1, 2013

I wish you a Happy Phaoring for 2013! Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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