November 2012 - Pharo-users

Re: [Pharo-users] Constrained Morph dragging

by Igor Stasenko

On 18 November 2012 10:29, Sebastian Nozzi <sebnozzi(a)gmail.com> wrote: > I came up with this... does what I need and I have no visual > artifacts anymore. Still, I'm not happy for having to override a > private method in order for this to work... :-/ > > Overridden existing method in my Morph subclass: > > privateFullMoveBy: delta > super privateFullMoveBy: delta. > (self wantsToConstrainDragging & self isBeingDragged) > ifTrue: [ self adjustPositionWhileDragging ] > > New methods in my Morph subclass: > > isBeingDragged > ^ self owner isHandMorph > > wantsToConstrainDragging > ^ true > > adjustPositionWhileDragging > self position: (self constrainedDragPositionFrom: (self topLeft)) > > constrainedDragPositionFrom: aNonConstrainedPosition > "Adjust the position to be constrained however you want. In this case > horizontally at y=450" > ^ (aNonConstrainedPosition x) @ 450. > > You would need to override only "wantsToConstrainDragging" and > "constrainedDragPositionFor:". > > Any critique to the code and/or naming welcome! :-) the main problem of morphic code that it is impossible to critique it.. all you can do is just study it, cut the cruft out, and only then you can see whether design was sound or not and try to critique :) what i would propose, is to not narrow it just for constraining dragging. i think better would be to say 'wants to constrain own movement/repositioning and/or resizing' but i cannot find a proper selector which would clearly tell the purpose for that :) also, i wouldn't be surprised, that if you do some archeology in morphic code, you will find behavior which already does what you did :) > > Cheers, > > Sebastian > -- Best regards, Igor Stasenko.

Nov. 18, 2012

Re: [Pharo-users] Constrained Morph dragging

by Sebastian Nozzi

I came up with this... does what I need and I have no visual artifacts anymore. Still, I'm not happy for having to override a private method in order for this to work... :-/ Overridden existing method in my Morph subclass: privateFullMoveBy: delta super privateFullMoveBy: delta. (self wantsToConstrainDragging & self isBeingDragged) ifTrue: [ self adjustPositionWhileDragging ] New methods in my Morph subclass: isBeingDragged ^ self owner isHandMorph wantsToConstrainDragging ^ true adjustPositionWhileDragging self position: (self constrainedDragPositionFrom: (self topLeft)) constrainedDragPositionFrom: aNonConstrainedPosition "Adjust the position to be constrained however you want. In this case horizontally at y=450" ^ (aNonConstrainedPosition x) @ 450. You would need to override only "wantsToConstrainDragging" and "constrainedDragPositionFor:". Any critique to the code and/or naming welcome! :-) Cheers, Sebastian

Nov. 18, 2012

Re: [Pharo-users] Constrained Morph dragging

by Igor Stasenko

On 18 November 2012 08:53, Sebastian Nozzi <sebnozzi(a)gmail.com> wrote: > Hello Morphic experts, > > I am learning / experimenting with Morphic and have the following question: > > "How do I constrain the movement of a dragged Morph?" > > As illustrated here: > > http://jqueryui.com/draggable/#constrain-movement > > (e.g. constrain within axis/container) > > So far the "hack" I came up with was to aggresively re-position the > dragged Morph in its "drawOn:", if it is attached to a HandMorph: > > drawOn: aCanvas > self owner isHandMorph "is there a better way to ask: am I being dragged?" > ifTrue: [ self position: (self position x) @ 400 ]. > super drawOn: aCanvas. > > > I am sure this solution is pretty bad... I also get visual artifacts > when I move the mouse up/down. > > Are there better ways/hooks for this? > > Generally: is there a method that is called on submorphs whenever the > parent Morph was re-positioned/re-sized? > yes. if i remember it called doLayoutIn: but it would be really nice, if someone would trace all the messages which going between morphs, and document the right protocol(s) to use and customize. > Thanks in advance! > > > Sebastian > -- Best regards, Igor Stasenko.

Nov. 18, 2012

Constrained Morph dragging

by Sebastian Nozzi

Hello Morphic experts, I am learning / experimenting with Morphic and have the following question: "How do I constrain the movement of a dragged Morph?" As illustrated here: http://jqueryui.com/draggable/#constrain-movement (e.g. constrain within axis/container) So far the "hack" I came up with was to aggresively re-position the dragged Morph in its "drawOn:", if it is attached to a HandMorph: drawOn: aCanvas self owner isHandMorph "is there a better way to ask: am I being dragged?" ifTrue: [ self position: (self position x) @ 400 ]. super drawOn: aCanvas. I am sure this solution is pretty bad... I also get visual artifacts when I move the mouse up/down. Are there better ways/hooks for this? Generally: is there a method that is called on submorphs whenever the parent Morph was re-positioned/re-sized? Thanks in advance! Sebastian

Nov. 18, 2012

Re: [Pharo-users] FileTree queries

by Paul DeBruicker

I think the Metacello class is from the unreleased beta version. You can get it from here Http://www.github.com/dalehenrich/metacello-work I'm not sure if it'll solve your problem or not. On Nov 16, 2012, at 2:27 AM, CHRIS BAILEY <cpmbailey(a)btinternet.com> wrote: > My Metacello configuration doesn't want to load from FileTree if the monticello.meta directories are missing. This makes some sense to me as it won't be able to resolve any actual version numbers or releases. However all it can possibly do is just grab the packages from disk anyway. I saw something along the lines of Metacello new configuration: xxx; load somewhere whereas I still have my normal ConfigurationOfXXX loadBleedingEdge. But I don't have a Metacello class in my 1.4 Summer image. Do I need to get hold of this? > > --- On Thu, 15/11/12, Paul DeBruicker <pdebruic(a)gmail.com> wrote: > >> From: Paul DeBruicker <pdebruic(a)gmail.com> >> Subject: Re: [Pharo-users] FileTree queries >> To: "A friendly place where any question about pharo is welcome" <pharo-users(a)lists.gforge.inria.fr> >> Date: Thursday, 15 November, 2012, 17:25 >> On 11/15/2012 09:16 AM, Chris wrote: >>> Hi, >>> >>> I've just migrated to using FileTree with SVN and am >> wondering if it is >>> possible to use it without the monticello.meta? You >> obviously get a lot >>> of merge conflicts with these and the version file in >> particular, and I >>> didn't really see much benefit when using SVN for >> commit comments and >>> revision histories and so forth so have just been >> ignoring / deleting >>> them. It seems to work ok for the most part and by >> loading packages with >>> Gofer, but I feel like I'm fighting the system a bit >> and have not had >>> much luck with Metacello in particular which I would >> like to get working >>> again. Can anyone advise? >>> >>> Thanks >>> Chris >>> >> >> Why not just make SVN ignore those files? >> >> https://sdesmedt.wordpress.com/2006/12/10/how-to-make-subversion-ignore-fil… >> >> >

Nov. 16, 2012

[ANN] LZ4 Compressor binding for Pharo

by Mariano Martinez Peck

I better change the subject ;) On Fri, Nov 16, 2012 at 5:16 PM, Mariano Martinez Peck < marianopeck(a)gmail.com> wrote: > Hi guys. I wrote a Pharo binding for the LZ4 compressor. > If you are interested read here: > http://marianopeck.wordpress.com/2012/11/16/lz4-binding-for-pharo/ > And here: http://smalltalkhub.com/#!/~marianopeck/LZ4/ > > Cheers, > > -- > Mariano > http://marianopeck.wordpress.com > > -- Mariano http://marianopeck.wordpress.com

Nov. 16, 2012

LZ4 Compressor binding for Pharo

by Mariano Martinez Peck

Hi guys. I wrote a Pharo binding for the LZ4 compressor. If you are interested read here: http://marianopeck.wordpress.com/2012/11/16/lz4-binding-for-pharo/ And here: http://smalltalkhub.com/#!/~marianopeck/LZ4/ Cheers, -- Mariano http://marianopeck.wordpress.com

Nov. 16, 2012

Re: [Pharo-users] FileTree queries

by CHRIS BAILEY

My Metacello configuration doesn't want to load from FileTree if the monticello.meta directories are missing. This makes some sense to me as it won't be able to resolve any actual version numbers or releases. However all it can possibly do is just grab the packages from disk anyway. I saw something along the lines of Metacello new configuration: xxx; load somewhere whereas I still have my normal ConfigurationOfXXX loadBleedingEdge. But I don't have a Metacello class in my 1.4 Summer image. Do I need to get hold of this? --- On Thu, 15/11/12, Paul DeBruicker <pdebruic(a)gmail.com> wrote: > From: Paul DeBruicker <pdebruic(a)gmail.com> > Subject: Re: [Pharo-users] FileTree queries > To: "A friendly place where any question about pharo is welcome" <pharo-users(a)lists.gforge.inria.fr> > Date: Thursday, 15 November, 2012, 17:25 > On 11/15/2012 09:16 AM, Chris wrote: > > Hi, > > > > I've just migrated to using FileTree with SVN and am > wondering if it is > > possible to use it without the monticello.meta? You > obviously get a lot > > of merge conflicts with these and the version file in > particular, and I > > didn't really see much benefit when using SVN for > commit comments and > > revision histories and so forth so have just been > ignoring / deleting > > them. It seems to work ok for the most part and by > loading packages with > > Gofer, but I feel like I'm fighting the system a bit > and have not had > > much luck with Metacello in particular which I would > like to get working > > again. Can anyone advise? > > > > Thanks > > Chris > > > > Why not just make SVN ignore those files? > > https://sdesmedt.wordpress.com/2006/12/10/how-to-make-subversion-ignore-fil… > >

Nov. 16, 2012

Re: [Pharo-users] FileTree queries

by Paul DeBruicker

On 11/15/2012 09:16 AM, Chris wrote: > Hi, > > I've just migrated to using FileTree with SVN and am wondering if it is > possible to use it without the monticello.meta? You obviously get a lot > of merge conflicts with these and the version file in particular, and I > didn't really see much benefit when using SVN for commit comments and > revision histories and so forth so have just been ignoring / deleting > them. It seems to work ok for the most part and by loading packages with > Gofer, but I feel like I'm fighting the system a bit and have not had > much luck with Metacello in particular which I would like to get working > again. Can anyone advise? > > Thanks > Chris > Why not just make SVN ignore those files? https://sdesmedt.wordpress.com/2006/12/10/how-to-make-subversion-ignore-fil…

Nov. 15, 2012

FileTree queries

by Chris

Hi, I've just migrated to using FileTree with SVN and am wondering if it is possible to use it without the monticello.meta? You obviously get a lot of merge conflicts with these and the version file in particular, and I didn't really see much benefit when using SVN for commit comments and revision histories and so forth so have just been ignoring / deleting them. It seems to work ok for the most part and by loading packages with Gofer, but I feel like I'm fighting the system a bit and have not had much luck with Metacello in particular which I would like to get working again. Can anyone advise? Thanks Chris

Nov. 15, 2012