August 2014 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Hello

by stepharo

Welcome! You have some chapter on Roassal on Deep into Pharo book. Do not hesitate to ask questions even the one you think are stupid :) Stef On 1/8/14 21:34, Ichiseki wrote: > Hello > I'm totally new to Pharo and Smalltalk, but not new to programming. I want > to learn Pharo and Smalltalk especially to use Moose, Roasall and other data > visualization frameworks. > Where should I start? > I have lot of time to study and want something intensive with exercises and > a solid theory background. > thanks > Soseki Ichiro > > > > > -- > View this message in context: http://forum.world.st/Hello-tp4771473.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > >

Aug. 1, 2014

Re: [Pharo-users] Hello

by phil＠highoctane.be

http://pharo.org/documentation isn't too bad a place to start. Deep into Pharo is worth it. Interesting things in here too: https://ci.inria.fr/pharo-contribution/job/PharoForTheEnterprise/lastSucces… And http://stephane.ducasse.free.fr/FreeBooks/BlueBook/ looks like a must read to me. Enjoy, Phil On Fri, Aug 1, 2014 at 10:05 PM, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: > Hi! > > Welcome!! > > Probably the best to start is the following: > 1 - Read Pharo by example (http://pharobyexample.org) Probably until > Chapter 9. Note that Pharo has evolved quite a bit since the book has been > released. So you fill face some differences > > 2 - For Roassal, you may start from: http://agilevisualization.com There > is not much yet, only a quick start chapter. Give a try! > > 3 - For Moose there is: http://www.moosetechnology.org and in particular > http://www.themoosebook.org/book > > We are doing a large effort of documentation. Try and give us feedback on > what works and what does not. > We will help you > > Cheers, > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > On Aug 1, 2014, at 3:34 PM, Ichiseki <is076(a)outlook.com> wrote: > > Hello > I'm totally new to Pharo and Smalltalk, but not new to programming. I want > to learn Pharo and Smalltalk especially to use Moose, Roasall and other > data > visualization frameworks. > Where should I start? > I have lot of time to study and want something intensive with exercises and > a solid theory background. > thanks > Soseki Ichiro > > > > > -- > View this message in context: http://forum.world.st/Hello-tp4771473.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > >

Aug. 1, 2014

Re: [Pharo-users] Hello

by Alexandre Bergel

Hi! Welcome!! Probably the best to start is the following: 1 - Read Pharo by example (http://pharobyexample.org) Probably until Chapter 9. Note that Pharo has evolved quite a bit since the book has been released. So you fill face some differences 2 - For Roassal, you may start from: http://agilevisualization.com There is not much yet, only a quick start chapter. Give a try! 3 - For Moose there is: http://www.moosetechnology.org and in particular http://www.themoosebook.org/book We are doing a large effort of documentation. Try and give us feedback on what works and what does not. We will help you Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Aug 1, 2014, at 3:34 PM, Ichiseki <is076(a)outlook.com> wrote: > Hello > I'm totally new to Pharo and Smalltalk, but not new to programming. I want > to learn Pharo and Smalltalk especially to use Moose, Roasall and other data > visualization frameworks. > Where should I start? > I have lot of time to study and want something intensive with exercises and > a solid theory background. > thanks > Soseki Ichiro > > > > > -- > View this message in context: http://forum.world.st/Hello-tp4771473.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >

Aug. 1, 2014

Hello

by Ichiseki

Hello I'm totally new to Pharo and Smalltalk, but not new to programming. I want to learn Pharo and Smalltalk especially to use Moose, Roasall and other data visualization frameworks. Where should I start? I have lot of time to study and want something intensive with exercises and a solid theory background. thanks Soseki Ichiro -- View this message in context: http://forum.world.st/Hello-tp4771473.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Aug. 1, 2014

Re: [Pharo-users] Roassal2 RTDraggable grid and synchronized movement

by Peter UhnÃ¡k

Hi Alex, While the "snap to grid" might be complicated I thought of simpler solution that might be achievable purely at Roassal level without the need to change Trachel classes. You can look at Umlet, since I am trying to copy it's grid behavior here. Basically you don't move objects with mouse immediately but only after fixed increments. However I've encountered a problem with TRMouseDragging>>step, since I would probably need to continuously sum the individual steps and then reset them when dragging has started. Here is a _very_ crude prototype: --------------------- "i subclassed RTDraggable and changed initializeElement: method as follows" initializeElement: element | sum gridSize | gridSize := 20. sum := 0 @ 0. element when: TRMouseDragging do: [ :e | | d t | t := RTGroup withAll: groupToDrag. (t includes: element) ifFalse: [ t add: element ]. d := element view canvas camera distanceFromPixelToSpace: e step. sum := sum + d. "move element only in increments of gridSize" d := gridSize * ((sum x / gridSize) truncated @ (sum y / gridSize) truncated). sum := sum - d. t translateBy: d. e signalUpdate ] --------------------- and here is a demo utilizing it ----------------------------- | v e1 e2 line gridSize b1 b2 b3 b4 edge | v := RTView new. "draw grid" gridSize := 20. (-20 to: 20) do: [ :i | b1 := RTBox element. b2 := RTBox element. b3 := RTBox element. b4 := RTBox element. b1 translateTo: (i * gridSize) @ -1000. "top side" b2 translateTo: (i * gridSize) @ 1000. "bottom side" b3 translateTo: -1000 @ (i * gridSize). "left side" b4 translateTo: 1000 @ (i * gridSize). "right side" "vertical line" edge := RTLine edgeFrom: b1 to: b2. v add: edge. "horizontal line" edge := RTLine edgeFrom: b3 to: b4. v add: edge. ]. e1 := (RTEllipse new size: 30; color: Color magenta) element. e1 translateTo: -20 @ 0. e1 @ RGGridDraggable. e2 := (RTEllipse new size: 30; color: Color magenta) element. e2 translateTo: 20 @ 0. e2 @ RGGridDraggable. (line := RTLine edgeFrom: e1 to: e2) shape color:Color black. v add: e1; add: e2; add: line. v open. ----------------------------- Obviously it needs a lot of fine-tuning and such. Since RTInteraction (RTDraggable) instances are not created directly the gridSize would have to be stored probably class side. Also there is a problem with resetting the "sum" variable when dragging starts. (There is no TRMouseDragStart event as far as I've seen). And also drawing the grid itself the way I've done is very brutal and doesn't really work if I want to move the canvas camera (perhaps image pattern as a background would work better). What are your thoughts on this? Peter On Fri, Aug 1, 2014 at 4:07 PM, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: > Hi Peter! > > > While playing with RTMultiLine I thought that it would be nice to have > option for RTDraggable elements to snap to a grid / move only by fixed > increments - for example the position could only be divisible by 10 (grid > size would be 10), so dragging from 20@10 to 26@4 would jump to 30@0. Is > something like this possible with current implementation? > > > I first thought this would be easy. But actually it is not. > The way to achieve the snap on grid behavior is to have an indirection in > the Trachel classes. Each trachel shape knows its position (the position is > contained in the matrix attached to each shape). The snap-on-grid means you > need to slightly process the matrix coordinate. Maybe there are other way > to do this, but it does not look like. Changing Trachel because of this > seems a bit overkill... > > Cheers, > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > On Jul 31, 2014, at 3:58 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > > While playing with RTMultiLine I thought that it would be nice to have > option for RTDraggable elements to snap to a grid / move only by fixed > increments - for example the position could only be divisible by 10 (grid > size would be 10), so dragging from 20@10 to 26@4 would jump to 30@0. Is > something like this possible with current implementation? > > > > The second question is: is it possible for element to subscribe for > position updates of another element? (I.e. element A watches for movement > of element B and moves accordingly). I know I could add both of them to a > composite shape or RTGroup (RTDraggable>>groupToDrag:), however I would > prefer something more loosely coupled. > > > > In RTDraggable>>initializeElement: i found > > " element when: TRMouseDragging do: [ :e | e element translateBy: e > step. e signalUpdate ]" > > however it is commented out so perhaps there some other way? > > > > Peter > > >

Aug. 1, 2014

Re: [Pharo-users] Data Science with Pharo?

by Thierry Goubier

Le 31/07/2014 15:29, Alexandre Bergel a Ã©crit : >> I am successful using Pharo + Roassal/Mondrian in analyzing and visualizing IT architecture models. And it is real fun. :-) > Glad to ear this :-) > > Yes, the vision I see behind Pharo, Moose, Roassal is to provide a solid alternative to R. We are not there yet, but we will get there. Cool. I'm interested by that objective :) Thierry

Aug. 1, 2014

Re: [Pharo-users] Roassal2 RTDraggable grid and synchronized movement

by Alexandre Bergel

Hi Peter, Events are emitted by Trachel directly. Roassal does not emit event itself. But it can define callbacks for these events. Being able to define multiline by clicking on a line is very valuable. go go go! And ask question if you are blocked. Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jul 31, 2014, at 4:26 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > Addendum: generally when it comes to Mouse events, using TRMouse* events should be the way to go? E.g. I want to add a control point when I click somewhere on the line so I could subscribe for TRMouseRightClick announcement. My question however is whether using TRachert events is ok. Shouldn't this be handled at Roassal level as it was done in Roassal1 (ROMouseRightClick)? > > > On Thu, Jul 31, 2014 at 9:58 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > While playing with RTMultiLine I thought that it would be nice to have option for RTDraggable elements to snap to a grid / move only by fixed increments - for example the position could only be divisible by 10 (grid size would be 10), so dragging from 20@10 to 26@4 would jump to 30@0. Is something like this possible with current implementation? > > The second question is: is it possible for element to subscribe for position updates of another element? (I.e. element A watches for movement of element B and moves accordingly). I know I could add both of them to a composite shape or RTGroup (RTDraggable>>groupToDrag:), however I would prefer something more loosely coupled. > > In RTDraggable>>initializeElement: i found > " element when: TRMouseDragging do: [ :e | e element translateBy: e step. e signalUpdate ]" > however it is commented out so perhaps there some other way? > > Peter >

Aug. 1, 2014

Re: [Pharo-users] Roassal2 RTDraggable grid and synchronized movement

by Alexandre Bergel

> The second question is: is it possible for element to subscribe for position updates of another element? (I.e. element A watches for movement of element B and moves accordingly). I know I could add both of them to a composite shape or RTGroup (RTDraggable>>groupToDrag:), however I would prefer something more loosely coupled. > > In RTDraggable>>initializeElement: i found > " element when: TRMouseDragging do: [ :e | e element translateBy: e step. e signalUpdate ]" > however it is commented out so perhaps there some other way? Yes you can. Not using events, but Trachel callbacks. Consider the example: -=-=-=-=-=-=-=-=-=-=-=-= | v | v := RTView new. es := RTEllipse elementsOn: Collection withAllSubclasses. v addAll: es. es @ (RTLabelled new text: #numberOfMethods). es @ RTPopup @ RTDraggable. RTMetricNormalizer new elements: es; normalizeSize: #numberOfMethods min: 5 max: 20 using: #sqrt. RTFlowLayout new gapSize: 15; on: es. v -=-=-=-=-=-=-=-=-=-=-=-= When you move a circle, the label moves as well. There is a âconstraintâ that says the label sticks to the circle The class TRConstraint contains many utility methods you may enjoy to define constraints between elements. For example: TRConstraint class >> stick: aShape onTheTopLeftOf: anotherShape | b | self move: aShape onTheTopLeftOf: anotherShape. b := [ :shape :step | self move: aShape onTheTopLeftOf: anotherShape ]. anotherShape addCallback: (TRTranslationCallback block: b). anotherShape addCallback: (TRExtentCallback block: b) Let us know if you have further question. Cheers, Alexandre

Aug. 1, 2014

Re: [Pharo-users] Roassal2 RTDraggable grid and synchronized movement

by Alexandre Bergel

Hi Peter! > While playing with RTMultiLine I thought that it would be nice to have option for RTDraggable elements to snap to a grid / move only by fixed increments - for example the position could only be divisible by 10 (grid size would be 10), so dragging from 20@10 to 26@4 would jump to 30@0. Is something like this possible with current implementation? I first thought this would be easy. But actually it is not. The way to achieve the snap on grid behavior is to have an indirection in the Trachel classes. Each trachel shape knows its position (the position is contained in the matrix attached to each shape). The snap-on-grid means you need to slightly process the matrix coordinate. Maybe there are other way to do this, but it does not look like. Changing Trachel because of this seems a bit overkill... Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jul 31, 2014, at 3:58 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > While playing with RTMultiLine I thought that it would be nice to have option for RTDraggable elements to snap to a grid / move only by fixed increments - for example the position could only be divisible by 10 (grid size would be 10), so dragging from 20@10 to 26@4 would jump to 30@0. Is something like this possible with current implementation? > > The second question is: is it possible for element to subscribe for position updates of another element? (I.e. element A watches for movement of element B and moves accordingly). I know I could add both of them to a composite shape or RTGroup (RTDraggable>>groupToDrag:), however I would prefer something more loosely coupled. > > In RTDraggable>>initializeElement: i found > " element when: TRMouseDragging do: [ :e | e element translateBy: e step. e signalUpdate ]" > however it is commented out so perhaps there some other way? > > Peter

Aug. 1, 2014

Re: [Pharo-users] New chapter of AgileVisualization

by Alexandre Bergel

> Cool!! This is just what we needed - simple, easy examples. How about a > downloadable image with the examples already loaded (it's hard to select the > code from the pdf to copy/paste into Pharo)? That is a very good point! What would be easy to do I think, is to have a link on the source code that jump to a .txt located next to the .pdf with the source code. > There was also a typo - 'convent' -> 'convert'. Fixed! Thanks! Alexandre

Aug. 1, 2014