October 2017 - Pharo-users - lists.pharo.org

Hiding the cursor in pharo and/or bloc
by Steven Costiou Oct. 3, 2017

Oct. 3, 2017

Hi, i've been playing with bloc, and i am trying to completely remove the cursor (i.e. always display a blank cursor). I can't find how. Removing the Pharo cursor would also be ok, but i can't either. I can only show a blank cursor for a few moments but after moving the mouse too much it becomes normal again. I have tried: Cursor currentCursor: Cursor blank (seems not to work ?) Cursor blank beCursor (works for a few moments only...) Any way to do that permanently ? Steven.

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Spec "bindings"
by Rob Rothwell Oct. 3, 2017

Oct. 3, 2017

Hello, I was wondering what more experienced users than myself thought of the idea of an explicit Spec "connection point" to a domain model object similar to Dolphin's "showOn:" method, like: CounterApp showOn: counter. This would perhaps trigger something like Dolphin's Presenter>>model: message (although I've always found the use of "model" confusing when there are so many "models" involved.) after the widgets had been created: ComposableModel>>initializeBindings: anObject In many cases, if your domain model uses ValueHolders as well (like Spec does), making a connection could just mean replacing the Spec ValueHolder with your domain ValueHolder so changes to the domain model would automatically propagate to the UI presentation without providing explicit code in ComposableModel>>initializePresenter. However, since I am still trying to understand and learn Spec, it's quite possible I am missing some key point and there are reasons not to explore this line of thinking! Thank you, Rob

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Testing a Unicode Character's Category
by Prof. Andrew P. Black Oct. 3, 2017

Oct. 3, 2017

The Pharo image has a table of Unicode Character Categories in a class variable GeneralCategory of class Unicode. But there do not seem to be many methods to interpret this data. For example, while there is a method Unicode class >> #isDigit: aCharacter that checks if the Unicode category of aCharacter is Nd, and Unicode class >> #isLetter: aCharacter that checks if aCharacter is in one of the letter categories, there does not seem to be a general way of asking âwhat is the category of this characterâ. I want to check if a character is a mathematical symbol, that is, if it is in the Unicode Category Sm. Whatâs the right way of doing this? Would it be reasonable to add a method Unicode class >> #category: aCharacter that answers one of the 29 category symbols #Cc to #Zs? Or âisâ methods for each category? Andrew

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Roasssal not working on Windows with Pharo 6.1
by kmo Oct. 2, 2017

Oct. 2, 2017

Is it just me or my systems but is there a major problem with Roassal on Pharo 6.1 on Windows? At work on my Windows 7 machine, Roassal installs from the catalog browser but the examples will not run. I get an error - External module not found. it seems to be looking for the Surface dll which is definitely present in the pharo folder. On my Windows 10 netbook, Roassal will not even install from the catalog browser. It starts to install then comes up with an unhelpful "something has gone wrong" message. Roassal still works in Pharo 5. So is this just a 6.1 issue? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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