April 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] finding Pharo Launcher

by Damien Cassou

Mark Bestley <st(a)bestley.co.uk> writes: > On 11/04/2016 12:56, Damien Cassou wrote: >> several persons believe the launcher is not ready to be the default >> download for everyone. Unfortunately, nobody has time to work on it. >> > Is there a list ot things that need to be fixed for this to happen https://github.com/pharo-project/pharo-launcher/issues I think some people have had a hard time understanding the GUI. That's why I designed a prototype: https://github.com/pharo-rocker/rocker-brick/tree/master/mockups -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill

April 11, 2016

Re: [Pharo-users] FFI return by reference

by Esteban Lorenzano

> On 11 Apr 2016, at 06:24, Thibault Raffaillac <thibault.raffaillac(a)inria.fr> wrote: > >>> 1) Declare a class variable >>> >>> MyClass class>>initialize >>> INT_PTR := FFIExternalValueHolder ofType: ?int?. >> >> as a larger explanation, this will create an anonymous subclass to keep ?int? >> values, than later you can use as a type in your function call. Some people >> would call this obscure, but is a good way of solving this problem (I >> adopted it from old NB). >> If you want to have a named class instead an anonymous class, you can just >> subclass FFIExternalValueHolder: >> >> FFIExternalValueHolder subclass: #MyIntPtr >> >> and then implement typeDecl class method >> >> MyIntPtr class>>typeDecl >> ^ ?int' >> >> and this will work as the anonymous class > > The second option is definitely what I want. Personally my option would be to put my types in a class pool and use them, not to extendâ¦ but option is there so you can choose what you want :) > I am trying to expose a function returning several ints, as in SDL2>>mouseStateX: y: (excluding the possibility to return a Point). > However I would rather not define my own int holder, can't we have generic holders to rely on? I will not add for the moment that predefined types value holdersâ¦ We would need to add one for each type we support to be consistent, and document it, and add tests. And btwâ¦ you do have a generic holderâ¦ is just that you need to refine it to what you want :) You could always use a ByteArray and took values later (some functions in Athens do it like that). The advantage of this approach (using plain ByteArrays) is that you do not need to change function signature at the cost of needing to do manually what the value holder does for you. My advise is that you go with what you need, we can consider add predefined value holders later. Esteban > > Thibault >

April 11, 2016

Re: [Pharo-users] finding Pharo Launcher

by Mark Bestley

On 11/04/2016 12:56, Damien Cassou wrote: > Mark Bestley <st(a)bestley.co.uk> writes: > > >> to try but I can understand only a Pharo 4 one being advertised. >> >> I looked on the Pharo Downloads page <http://pharo.org/download> and >> could not find it. > > http://smalltalkhub.com/#!/~Pharo/PharoLauncher > >> Googling just gives announcements of it and old messages for email >> lists. and latest is >> <https://pharoweekly.wordpress.com/2016/01/15/pharo-launcher-spur-and-prespu…> >> which gives the Smalltalk Hub link which is not much help to getting >> started > > you can just download the latest launcher from the "How to install" section. > >> I suspect it just needs a small edit to the downloads page to make it >> findable for me but if it is to be used as an entry point then perhaps >> it need to be made more obvious on the pharo.org pages. OK found > several persons believe the launcher is not ready to be the default > download for everyone. Unfortunately, nobody has time to work on it. > Is there a list ot things that need to be fixed for this to happen -- Mark

April 11, 2016

Re: [Pharo-users] finding Pharo Launcher

by Damien Cassou

Mark Bestley <st(a)bestley.co.uk> writes: > where can you get a ready to run Pharo Launcher from (I am interested in > OSX but other OSes should be answered as well). I would like a Pharo 5 what do you mean exactly? Pharo Launcher is implemented on top of Pharo 4, not Pharo 5. But you should not care about that (it could also be implemented in Rebol and that shouldn't impact you). If you are about launching Pharo 5 images, that's already possible will all launchers built during the last months. http://smalltalkhub.com/#!/~Pharo/PharoLauncher > 64 bit one Pharo vm is 32 bits only for now. But this should also not be a problem. Most of us run Pharo on a 64 bit system. > to try but I can understand only a Pharo 4 one being advertised. > > I looked on the Pharo Downloads page <http://pharo.org/download> and > could not find it. http://smalltalkhub.com/#!/~Pharo/PharoLauncher > Googling just gives announcements of it and old messages for email > lists. and latest is > <https://pharoweekly.wordpress.com/2016/01/15/pharo-launcher-spur-and-prespu…> > which gives the Smalltalk Hub link which is not much help to getting > started you can just download the latest launcher from the "How to install" section. > I suspect it just needs a small edit to the downloads page to make it > findable for me but if it is to be used as an entry point then perhaps > it need to be made more obvious on the pharo.org pages. several persons believe the launcher is not ready to be the default download for everyone. Unfortunately, nobody has time to work on it. -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill

April 11, 2016

Re: [Pharo-users] FFI return by reference

by Thibault Raffaillac

> > 1) Declare a class variable > > > > MyClass class>>initialize > > INT_PTR := FFIExternalValueHolder ofType: ?int?. > > as a larger explanation, this will create an anonymous subclass to keep ?int? > values, than later you can use as a type in your function call. Some people > would call this obscure, but is a good way of solving this problem (I > adopted it from old NB). > If you want to have a named class instead an anonymous class, you can just > subclass FFIExternalValueHolder: > > FFIExternalValueHolder subclass: #MyIntPtr > > and then implement typeDecl class method > > MyIntPtr class>>typeDecl > ^ ?int' > > and this will work as the anonymous class The second option is definitely what I want. I am trying to expose a function returning several ints, as in SDL2>>mouseStateX: y: (excluding the possibility to return a Point). However I would rather not define my own int holder, can't we have generic holders to rely on? Thibault

April 11, 2016

Re: [Pharo-users] Passing nil with FFI

by Thibault Raffaillac

Great, that worked, thanks! > Hi, > > marshalling in UFFI is complex and sometimes not worthy, so we do not do > auto-conversion between nil in smalltalk o zero to NULL (yes, I know NULL=0, > but not for UFFI who is waiting a object type). > In this case (since it expects a kind of external object) you have to do: > > SDL2 glCreateContext: FFIExternalObject null. > > Esteban > > > > On 07 Apr 2016, at 12:06, Thibault Raffaillac > > <thibault.raffaillac(a)inria.fr> wrote: > > > > Hi, > > > > I am having trouble passing nil to a function with FFI (i.e. NULL, i.e. 0). > > For example: SDL2 glCreateContext: nil. > > The function expects a subclass of FFIExternalObject, so calls instVarAt: 1 > > but nil has no such field! > > Am I missing something? (like a special nil instance of FFIExternalObject) > > Note however that putting nil works when FFI expects a String. > > > > Cheers, > > Thibault Raffaillac > >

April 11, 2016

About Box

by Torsten Bergmann

Hi, >This is my first week with Pharo So welcome >This is my first week in a LONG time too >Also my first week with Pharo, and first week with Smalltalk in over 20 years. Welcome back ;) >but I cannot seem to create a HELP|ABOUT dialog Note that in Pharo 5 I changed the about box to be implemented in "AboutDialogWindow" (a subclass of LongMessageDialogWindow) to make this more explicit and more easy to find. if you already work with Pharo 5 (which will be ready in a few days) check the method: AboutDialogWindow openForPharo Also note that one can search by opening Spotter. Just SHIFT+ENTER and then type "about". Thanks T. http://astares.blogspot.com

April 11, 2016

Re: [Pharo-users] About Box

by Serge Stinckwich

On Mon, Apr 11, 2016 at 8:57 AM, Alistair Grant <akgrant0710(a)gmail.com> wrote: >> On Apr 10, 2016, at 6:44 PM, Bruce Peaslee <bruceapeaslee(a)comcast.net> >> wrote: >> >> This is my first week with Pharo. I have been moderately successful in >> learning how things go, but I cannot seem to create a HELP|ABOUT dialog. >> Pointing me in the right direction would be appreciated. > > Also my first week with Pharo, and first week with Smalltalk in over 20 years. Congrats ! Tell us what is your experience until now ;-) -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

April 11, 2016

Re: [Pharo-users] About Box

by Alistair Grant

> On Apr 10, 2016, at 6:44 PM, Bruce Peaslee <bruceapeaslee(a)comcast.net> > wrote: > > This is my first week with Pharo. I have been moderately successful in > learning how things go, but I cannot seem to create a HELP|ABOUT dialog. > Pointing me in the right direction would be appreciated. Also my first week with Pharo, and first week with Smalltalk in over 20 years. On 11 April 2016 at 02:07, Robert J Rothwell <r.j.rothwell(a)gmail.com> wrote: > Also, this default behavior can be reproduced with: > > (LongMessageDialogWindow new entryText: 'Hello') open > > (well, that doesn't set the title to "About"...) LongMessageDialogWindow new entryText: 'Hello World'; title: 'About'; open I figured this one out by changing the browser to class hierarchy and walking up through the classes until I found a likely method (title:). Cheers, Alistair

April 11, 2016

Re: [Pharo-users] MessageDialogWindow(s)

by Nicolai Hess

2016-04-11 8:29 GMT+02:00 Stephan Eggermont <stephan(a)stack.nl>: > On 11-04-16 02:00, Robert J Rothwell wrote: > >> Should >> >> (MessageDialogWindow new text: 'Hello') open >> >> work? >> >> I get a stack trace on CompositionScanner if I try to set the text. >> > > Yes. Please open a bug entry. (If you want to help, try with a few older > versions > of pharo to find out when the bug was introduced) > Yes, maybe MessageDialogWindow should init the font with a default font. > Also, is there a way to display the dialog modally (relative to your >> application)? >> >> Take a look at Morph>openModal: > > Stephan > > And this DialogWindow classes are used by UITheme, for example Smalltalk ui theme messageIn:World text:'Some MessageText' title:'The Title'. or for long messages: Smalltalk ui theme longMessageIn:World text: ProfStef pharoZenValuesContents title:'Pharo Zen'. The "World" argument specifies to which Window this Dialog should be modal.

April 11, 2016