December 2011 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] Athens and Cairo, first baby steps

by Igor Stasenko

On 21 December 2011 10:16, Fernando Olivero <fernando.olivero(a)usi.ch> wrote: > You are using the last approach, using getData, nice that is already > implemented. > Yes. But it is quite ineffective, since you need to transfer bulk of data in memory for nothing. Later we should think how to avoid extra copying and directly use/display rendered artifacts. But right now it is sufficient :) -- Best regards, Igor Stasenko.

Dec. 21, 2011

Re: [Pharo-project] Athens and Cairo, first baby steps

by Igor Stasenko

On 21 December 2011 10:58, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > >> You are using the last approach, using getData, nice that is already >> implemented. >> >> Yes, i will move to Athens now. Up to now i've been playing with >> NBCairo, to render all the Gaucho shapes. >> >> I see that all NBCairo classes are replicated in Athens, > > not replicated :) > In fact Athens design supports well the decomposition of Cairo :) > >> NBCairoSurface=AthensCairoSurface, AthenCairoCanvas = Â NBCairoContext. >> Does it make sense to refactor Athens to use NBCairo? > > No just gets inspiration. > >> Currently there >> are two ways of interfacing with Cairo, maybe Athens should just reuse >> NBCairo. > > It depends what you call reuse. But for us NBCairo should disappear and just have Athens. > >> Athens should simply be "an adapter" from the Athens API, to the >> actual Cairo wrapper (NBCairo). > > Why? because we can call directly the cairo library > Athens defines a roles, like surface, canvas, paints, shapes and transformation and protocols for them. The concrete implementation (or classes) are not that important, since you should rely on protocol(s) of objects with designated roles. In this way a different backend may serve as well as any other for your application. I hope it will also teach people to not use directly classes everywhere, but instead use factory messages available from factory objects (which can be asked for creating a new object of certain properties), instead of using direct class name(s). NBCairo originally created by Javier as an example how to write binding of external library using NativeBoost. There was no any plans concerning developing NBCairo beyond serving as a simple example. I think it is more important to have a framework with own balanced and well designed API for vector graphics, not tied to some concrete library (like that we can switch the backend at any moment, while keep everything running). -- Best regards, Igor Stasenko.

Dec. 21, 2011

[Pharo-project] External web browser

by Hilaire Fernandes

Hello, What is the status of external web browser use. Last time I checked several months ago I can't use it with Linux. Anyone using it successfully recently? Thanks Hilaire -- Dr. Geo -- http://www.drgeo.eu

Dec. 21, 2011

Re: [Pharo-project] Application settings

by StÃ©phane Ducasse

alain did we describe that in the chapter? Stef On Dec 21, 2011, at 10:59 AM, Alain Plantec wrote: > Hi Hilaire, > > If you want a package specific keyword, then your package must add a sepecific method to SettingTreeBuilder. > for drgeosettings if should be: > > SettingTreeBuilder>> drgeosettings > <settingPragmaProcessor> > "Process a<drgeosettings> pragma" > > currentPragma methodClass theNonMetaClass perform: currentPragma selector with: self. > > Cheers > Alain > > > > Le 21/12/2011 10:49, Hilaire Fernandes a Ã©crit : >> I want to use drgeo specific setting and let the user browser >> drgeosettings only. >> As documented in the SettingBrowser comment, I defined: >> >> drgeoSettingsOn: aBuilder >> <drgeosettings> >> (aBuilder group: #drgeo) >> label: 'Dr. Geo'; >> description: 'All Dr. Geo related settings' translated; >> noOrdering; >> with: [ >> >> >> Then to browse drgeo specific settings I evaluate; >> >> (SettingBrowser forKeywords: #('drgeosettings')) open >> >> I got a MNU SettingTreeBuilder>>drgeosettings >> >> Do I need to implement it? >> >> Hilaire >> > >

Dec. 21, 2011

Re: [Pharo-project] Application settings

by Hilaire Fernandes

Yeah, in fact I just added drgeosettings ^ self systemsettings By the way, the settings framework is very nice Hilaire Le 21/12/2011 10:59, Alain Plantec a Ã©crit : > Hi Hilaire, > > If you want a package specific keyword, then your package must add a > sepecific method to SettingTreeBuilder. > for drgeosettings if should be: > > SettingTreeBuilder>> drgeosettings > <settingPragmaProcessor> > "Process a<drgeosettings> pragma" > > currentPragma methodClass theNonMetaClass perform: currentPragma > selector with: self. > > Cheers > Alain > > > > Le 21/12/2011 10:49, Hilaire Fernandes a Ã©crit : >> I want to use drgeo specific setting and let the user browser >> drgeosettings only. >> As documented in the SettingBrowser comment, I defined: >> >> drgeoSettingsOn: aBuilder >> <drgeosettings> >> (aBuilder group: #drgeo) >> label: 'Dr. Geo'; >> description: 'All Dr. Geo related settings' translated; >> noOrdering; >> with: [ >> >> >> Then to browse drgeo specific settings I evaluate; >> >> (SettingBrowser forKeywords: #('drgeosettings')) open >> >> I got a MNU SettingTreeBuilder>>drgeosettings >> >> Do I need to implement it? >> >> Hilaire >> > > > -- Dr. Geo -- http://www.drgeo.eu

Dec. 21, 2011

Re: [Pharo-project] Application settings

by Alain Plantec

Hi Hilaire, If you want a package specific keyword, then your package must add a sepecific method to SettingTreeBuilder. for drgeosettings if should be: SettingTreeBuilder>> drgeosettings <settingPragmaProcessor> "Process a<drgeosettings> pragma" currentPragma methodClass theNonMetaClass perform: currentPragma selector with: self. Cheers Alain Le 21/12/2011 10:49, Hilaire Fernandes a Ã©crit : > I want to use drgeo specific setting and let the user browser > drgeosettings only. > As documented in the SettingBrowser comment, I defined: > > drgeoSettingsOn: aBuilder > <drgeosettings> > (aBuilder group: #drgeo) > label: 'Dr. Geo'; > description: 'All Dr. Geo related settings' translated; > noOrdering; > with: [ > > > Then to browse drgeo specific settings I evaluate; > > (SettingBrowser forKeywords: #('drgeosettings')) open > > I got a MNU SettingTreeBuilder>>drgeosettings > > Do I need to implement it? > > Hilaire >

Dec. 21, 2011

Re: [Pharo-project] Athens and Cairo, first baby steps

by StÃ©phane Ducasse

> You are using the last approach, using getData, nice that is already > implemented. > > Yes, i will move to Athens now. Up to now i've been playing with > NBCairo, to render all the Gaucho shapes. > > I see that all NBCairo classes are replicated in Athens, not replicated :) In fact Athens design supports well the decomposition of Cairo :) > NBCairoSurface=AthensCairoSurface, AthenCairoCanvas = NBCairoContext. > Does it make sense to refactor Athens to use NBCairo? No just gets inspiration. > Currently there > are two ways of interfacing with Cairo, maybe Athens should just reuse > NBCairo. It depends what you call reuse. But for us NBCairo should disappear and just have Athens. > Athens should simply be "an adapter" from the Athens API, to the > actual Cairo wrapper (NBCairo). Why? because we can call directly the cairo library > > Fernando > > > > On Wed, Dec 21, 2011 at 10:04 AM, StÃ©phane Ducasse > <stephane.ducasse(a)inria.fr> wrote: >> >> On Dec 21, 2011, at 8:52 AM, Fernando Olivero wrote: >> >>> Igor, what does newSurface: do?, in the context of Cairo. >> >> I just create a cairo Surface >> >>> How do you render the contents of the Cairo surface to the Display? Or >>> are you using the >>> writeToPng->readFromPng to Form->Display Form mechanism. >> >> Copy from buffer to a form. >> Have a look at the implementation. >> >> >>> I was planning to use, NBCairoSurface>>getData:, which returns a >>> pointer to the data, and simply update the Display contents with the >>> surface's data. >> >> What would be good is that you use Athens? >> >> >>> >>> >>> Fernando >>> >>> On Tue, Dec 20, 2011 at 11:09 PM, StÃ©phane Ducasse >>> <stephane.ducasse(a)inria.fr> wrote: >>>> Alex normally you will just use athens and you will get a zoomable canvas :). >>>> So mondrian should not use Cairo (just athens. Athens defines an API and you will be able to have multiple back ends >>>> and your code should run the same on cairo or balloon (may be degraded in balloon). but your code will not be different. >>>> >>>> Stef >>>> >>>>> Your work is truly important! >>>>> I plan in the long term to make Mondrian and Roassal use Cairo. This has been on my todo list for quite some time already... >>>>> >>>>> Alexandre >>>>> >>>>> On 20 Dec 2011, at 14:56, Igor Stasenko wrote: >>>>> >>>>>> We binding an Athens API for Cairo library. It fits pretty well as a >>>>>> backend to API. >>>>>> >>>>>> Today i got some basics working. >>>>>> Mostly, the functionality covered by: >>>>>> >>>>>> AthensCairoSurfaceExamples example1 >>>>>> and >>>>>> AthensCairoSurfaceExamples example2 >>>>>> >>>>>> which drawing nothing fancy but just rectangle(s) with solid color. >>>>>> >>>>>> example2 >>>>>> " >>>>>> self example2 >>>>>> " >>>>>> >>>>>> | surf | >>>>>> >>>>>> surf := self newSurface: 100@100. >>>>>> >>>>>> surf drawDuring: [:can | >>>>>> surf clear. >>>>>> >>>>>> can setPaint: Color blue. >>>>>> >>>>>> can drawShape: ( >>>>>> can createPath: [:path | >>>>>> path >>>>>> absolute; >>>>>> lineTo: 50@0; >>>>>> lineTo: 50@50; >>>>>> lineTo: 0@50 >>>>>> ]) >>>>>> >>>>>> ]. >>>>>> >>>>>> Display getCanvas drawImage: surf asForm at: 0@0 >>>>>> >>>>>> >>>>>> P.S. Stef says that Athens API is quite cool :) >>>>>> >>>>>> -- >>>>>> Best regards, >>>>>> Igor Stasenko. >>>>>> <Screen Shot 2011-12-20 at 6.56.22 PM.png><Screen Shot 2011-12-20 at 6.57.04 PM.png> >>>>> >>>>> -- >>>>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: >>>>> Alexandre Bergel http://www.bergel.eu >>>>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>>> >>> >> >

Dec. 21, 2011

[Pharo-project] Application settings

by Hilaire Fernandes

I want to use drgeo specific setting and let the user browser drgeosettings only. As documented in the SettingBrowser comment, I defined: drgeoSettingsOn: aBuilder <drgeosettings> (aBuilder group: #drgeo) label: 'Dr. Geo'; description: 'All Dr. Geo related settings' translated; noOrdering; with: [ Then to browse drgeo specific settings I evaluate; (SettingBrowser forKeywords: #('drgeosettings')) open I got a MNU SettingTreeBuilder>>drgeosettings Do I need to implement it? Hilaire -- Dr. Geo -- http://www.drgeo.eu

Dec. 21, 2011

Re: [Pharo-project] Athens and Cairo, first baby steps

by Fernando Olivero

You are using the last approach, using getData, nice that is already implemented. Yes, i will move to Athens now. Up to now i've been playing with NBCairo, to render all the Gaucho shapes. I see that all NBCairo classes are replicated in Athens, NBCairoSurface=AthensCairoSurface, AthenCairoCanvas = NBCairoContext. Does it make sense to refactor Athens to use NBCairo? Currently there are two ways of interfacing with Cairo, maybe Athens should just reuse NBCairo. Athens should simply be "an adapter" from the Athens API, to the actual Cairo wrapper (NBCairo). Fernando On Wed, Dec 21, 2011 at 10:04 AM, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > > On Dec 21, 2011, at 8:52 AM, Fernando Olivero wrote: > >> Igor, what does newSurface: do?, in the context of Cairo. > > I just create a cairo Surface > >> How do you render the contents of the Cairo surface to the Display? Or >> are you using the >> writeToPng->readFromPng to Form->Display Form mechanism. > > Copy from buffer to a form. > Have a look at the implementation. > > >> I was planning to use, NBCairoSurface>>getData:, which returns a >> pointer to the data, and simply update the Display contents with the >> surface's data. > > What would be good is that you use Athens? > > >> >> >> Fernando >> >> On Tue, Dec 20, 2011 at 11:09 PM, StÃ©phane Ducasse >> <stephane.ducasse(a)inria.fr> wrote: >>> Alex normally you will just use athens and you will get a zoomable canvas :). >>> So mondrian should not use Cairo (just athens. Athens defines an API and you will be able to have multiple back ends >>> and your code should run the same on cairo or balloon (may be degraded in balloon). but your code will not be different. >>> >>> Stef >>> >>>> Your work is truly important! >>>> I plan in the long term to make Mondrian and Roassal use Cairo. This has been on my todo list for quite some time already... >>>> >>>> Alexandre >>>> >>>> On 20 Dec 2011, at 14:56, Igor Stasenko wrote: >>>> >>>>> We binding an Athens API for Cairo library. It fits pretty well as a >>>>> backend to API. >>>>> >>>>> Today i got some basics working. >>>>> Mostly, the functionality covered by: >>>>> >>>>> AthensCairoSurfaceExamples example1 >>>>> and >>>>> AthensCairoSurfaceExamples example2 >>>>> >>>>> which drawing nothing fancy but just rectangle(s) with solid color. >>>>> >>>>> example2 >>>>> " >>>>> self example2 >>>>> " >>>>> >>>>> Â Â Â | surf | >>>>> >>>>> Â Â Â surf := self newSurface: 100@100. >>>>> >>>>> Â Â Â surf drawDuring: [:can | >>>>> Â Â Â Â Â Â Â surf clear. >>>>> >>>>> Â Â Â Â Â Â Â can setPaint: Color blue. >>>>> >>>>> Â Â Â Â Â Â Â can drawShape: ( >>>>> Â Â Â Â Â Â Â Â Â Â Â can createPath: [:path | >>>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â path >>>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â absolute; >>>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â lineTo: 50@0; >>>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â lineTo: 50@50; >>>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â lineTo: 0@50 >>>>> Â Â Â Â Â Â Â Â Â Â Â ]) >>>>> >>>>> Â Â Â ]. >>>>> >>>>> Â Â Â Display getCanvas drawImage: Â Â surf asForm Â at: 0@0 >>>>> >>>>> >>>>> P.S. Stef says that Athens API is quite cool :) >>>>> >>>>> -- >>>>> Best regards, >>>>> Igor Stasenko. >>>>> <Screen Shot 2011-12-20 at 6.56.22 PM.png><Screen Shot 2011-12-20 at 6.57.04 PM.png> >>>> >>>> -- >>>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: >>>> Alexandre Bergel Â http://www.bergel.eu >>>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. >>>> >>>> >>>> >>>> >>>> >>>> >>> >>> >> >

Dec. 21, 2011

Re: [Pharo-project] Athens and Cairo, first baby steps

by StÃ©phane Ducasse

On Dec 21, 2011, at 8:52 AM, Fernando Olivero wrote: > Igor, what does newSurface: do?, in the context of Cairo. I just create a cairo Surface > How do you render the contents of the Cairo surface to the Display? Or > are you using the > writeToPng->readFromPng to Form->Display Form mechanism. Copy from buffer to a form. Have a look at the implementation. > I was planning to use, NBCairoSurface>>getData:, which returns a > pointer to the data, and simply update the Display contents with the > surface's data. What would be good is that you use Athens? > > > Fernando > > On Tue, Dec 20, 2011 at 11:09 PM, StÃ©phane Ducasse > <stephane.ducasse(a)inria.fr> wrote: >> Alex normally you will just use athens and you will get a zoomable canvas :). >> So mondrian should not use Cairo (just athens. Athens defines an API and you will be able to have multiple back ends >> and your code should run the same on cairo or balloon (may be degraded in balloon). but your code will not be different. >> >> Stef >> >>> Your work is truly important! >>> I plan in the long term to make Mondrian and Roassal use Cairo. This has been on my todo list for quite some time already... >>> >>> Alexandre >>> >>> On 20 Dec 2011, at 14:56, Igor Stasenko wrote: >>> >>>> We binding an Athens API for Cairo library. It fits pretty well as a >>>> backend to API. >>>> >>>> Today i got some basics working. >>>> Mostly, the functionality covered by: >>>> >>>> AthensCairoSurfaceExamples example1 >>>> and >>>> AthensCairoSurfaceExamples example2 >>>> >>>> which drawing nothing fancy but just rectangle(s) with solid color. >>>> >>>> example2 >>>> " >>>> self example2 >>>> " >>>> >>>> | surf | >>>> >>>> surf := self newSurface: 100@100. >>>> >>>> surf drawDuring: [:can | >>>> surf clear. >>>> >>>> can setPaint: Color blue. >>>> >>>> can drawShape: ( >>>> can createPath: [:path | >>>> path >>>> absolute; >>>> lineTo: 50@0; >>>> lineTo: 50@50; >>>> lineTo: 0@50 >>>> ]) >>>> >>>> ]. >>>> >>>> Display getCanvas drawImage: surf asForm at: 0@0 >>>> >>>> >>>> P.S. Stef says that Athens API is quite cool :) >>>> >>>> -- >>>> Best regards, >>>> Igor Stasenko. >>>> <Screen Shot 2011-12-20 at 6.56.22 PM.png><Screen Shot 2011-12-20 at 6.57.04 PM.png> >>> >>> -- >>> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: >>> Alexandre Bergel http://www.bergel.eu >>> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. >>> >>> >>> >>> >>> >>> >> >> >

Dec. 21, 2011