Wrapping up our first steps – Event Server, Material Design, Daily Scrum

The Event Organizer application has already the basic features and we can move to apply more advanced feature. But let explain me, what me and my friends have done recently.

Our application is already able to manage conferences and events. An owner can edit and change events in the way he/she wants to. And we have two version of this app for websites and for mobile phones(Android). The orga serv which I prepared share Json API to both Android and Web app. I guess it is really comfortable solution because it enables to share date between web and mobile app. Our app’s template style is based on material bootstrap, the same is used by Arnav in his application. It is very flat design.

Zrzut ekranu 2015-07-06 o 22.58.07
First Version of Open EVent Menu Bar

What I really like during this term is daily scrum, where we can share what we have already done, what are we going to do next, and what were the obstacles. Because of it, we can easily be in touch and avoid duplicating our work. We can also discuss and quickly choose the most useful solution. Duke and Mario accompany us and as always were ready to help with any trouble.

Arnav and Manan also organized a conference on their university. Many students were invited and discussed about taking part in open source projects. I regret not to having taken part in it, but India is so far from my country, that I could not get there.

I hope that the starting up part of this project will be also so developing and exciting, and we will finish it with a huge success. And all of us will be very proud, learn many new things, and improve our experience.

In the nearest future Arnav, Duke and me are going to create three environments: staging, production, and development. It helps us to organize our work. I am sure that we manage to do it.

Ok, so stay tuned. “Show must go on”! We don’t stop working! 😉

Pharo Launcher : What? How? #PharoInProgress

reposted from jigyasagrover.wordpress.com/pharolauncher-tutorial-what-how-pharoinprogress

This tutorial has been included as a chapter in  Pharo In Progress.



This post aims to provide a basic overview of what PharoLauncher is and give a step-by-step approach on how to use this application of great advantage.

Overview

Pharo is an open source implementation of the programming language and environment Smalltalk. Pharo is not Smalltalk. Pharo is Smalltalk-inspired.

Pharo offers strong live programming features such as immediate object manipulation, live update, and hot recompilation. Live programming environment is in the heart of the system. Pharo also supports advanced web development with frameworks such as Seaside and more recently Tide.

The official Pharo website defines it as: ”Pharo is a pure object-oriented programming language and a powerful environment, focused on simplicity and immediate feedback (think IDE and OS rolled into one). ”

Pharo relies on a virtual machine that is written almost entirely in Smalltalk itself. Pharo environment is its own little world, designed around a conception of a computer with a minimal operating system and populated with living objects. A Smalltalk implementation is composed of an image (binary code), a major source file and a ‘changes’ file. The image is called Virtual Image (VI) because is independent of the platform you use for running Smalltalk. Smalltalk systems store the entire program state (including both Class and non-Class objects) in an image file. The image can then be loaded by the Smalltalk virtual machine to restore a Smalltalk-like system to a prior state.

As Pharo is open source, it growing rapidly owing to the contributions of people all around the world. Each day we have a new update of the image of Pharo which makes it cumbersome to keep track of updates. It becomes quite a task when one has to download a new image seperately each he/she plans to work on something having the latest issues fixed, new features added etc. That’s where the PharoLauncher comes in the picture. Pharo Launcher, a cross-platform application that

  • lets you manage your Pharo images (launch, rename, copy and delete);
  • lets you download image templates (i.e., zip archives) from many different sources (Jenkins, files.pharo.org, and your local cache) and create new images from any template.

The idea behind the Pharo Launcher is that you should be able to access it very rapidly from your OS application launcher. As a result launching any image is never more than 3 clicks away. “PharoLauncher” is useful to a user who develops and needs to constantly switch between images. PharoLauncher is also a very handy tool to download specific image update versions if you want to reproduce or fix Pharo bugs.Pharo Launcher is a Pharo-based application allowing you to manage a list of images (download, rename, delete) and switch between them without aditional tools.

Downloading/Installing PharoLauncher

As discussed earlier about the rapid evolvement of Pharo , kindly check out http://www.pharo.org/download to get the latest download/install instructions for Pharo Launcher.

Linux Ubuntu:

(http://pharo.org/download#ubuntu) Ubuntu users can use the dedicated ppa to install Pharo

sudo add-apt-repository ppa:pharo/stable
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install pharo-launcher

If you don’t have the add-apt-repository command, install the software-properties-common package and try again. If you are on a server (no GUI), you can get a Pharo Virtual Machine by installing pharo-vm-core.

On Ubuntu, the Launcher is installed as /usr/bin/pharo, so you can type the following command on the terminal to start the Pharo Launcher.

pharo 

ArchLinux :

(http://lists.pharo.org/pipermail/pharo-users_lists.pharo.org/2014-March/010932.html)

$ yaourt pharo-vm-latest
$ pharo /path/to/your/image

There’s also a pharo-launcher package that depends on pharo-vm:

$ yaourt pharo-launcher
$ pharo-launcher

Windows:

Download and install the executable from the link provided here.

MacOS:

Use the link (http://files.pharo.org/platform/launcher/latest.dmg)to install Pharo Launcher on Mac system. After installation , you’ll observe that the Launcher is installed in /Applications.

Using PharoLauncher

Launch the Pharo launcher image using the platform-specific VM. The image below depicts how a PharoLauncher looks like when it is opened.

pharolauncher_edited_new

The screen displayed initially has been divided into two parts.

The left part ‘Existing Images’ displays the images already created by the user. Initially after the installation the left side with local images is empty. Whereas the the right side is the ‘Templates’ section which displays the image templates from various resources available for download from the internet. The ‘Existing Images’ section has 3 buttons : Launch, Delete and Refresh. The ‘Templates’ section has 2 buttons : Create Image and Refresh.

At the bottom of the launcher we have the buttons for quit and settings.

Select the image you wish to work on from the list and the sources provided in the ‘Templates’ section and download it. For instance you can download “Pharo4.0 (beta)” from the options provided which is the latest image as of today. By clicking on the ‘Create Image’ button at the top right corner.

Note that also the images from contribution CI are available. So you can easily download “Artefact”, “Moose”, … images according to your choice.

It will download the image into a specific directory somewhere in your users home directory. Each image gets an own folder. Use the “Show in folder” menu item to open this location.

The location of the images can be changed through the ‘Settings Browser’ option located at the bottom-right corner. Go to the ‘Open Settings’ > ‘Location of your images’. Now enter the desired path in the place provided as shown in the figure.

location

After ‘Creating an image’ , a dialog box appears which asks you to give a name to the image as shown in figure below.

rename

After entering the suitable name , the image is displayed in the ‘Existing Images’ section.

myimage

To launch the image, simply select your option and click on the ‘Launch’ button located at the top right corner of the ‘Existing Images’ section and voila ! You have the pharo image of your choice running with the name of your choice.

myimg

You could watch this video on Pharo Launcher by Kilon Alios to get a clearer view (https://www.youtube.com/watch?v=fNim2Yxs320) Resources to explore further:

Do like the post if it was helpful. For any queries/suggestions please comment below. Thank You

searchQuick Apprise: FOUR #GoogleSummerOfCode #FOSSASIA

banner-gsoc2015.png.pagespeed.ce.1-XG35qq3R8SQJ5DGgL9

The intended “searchQuick” (sQuick) is an application to enable a user to search a set of books or texts, like an encyclopedia, or some other topical book collection offline built in the open source platform Pharo 4.0.

header



After indexing the content and the next task that was covered was searching for the user input string. The #queryString: does a fantastic job as of now.
The search results were printed in a scroll-able pane by iterating through a loop so as to cover each and every existence of the desired string. The search results window also enables the user to view the content of the chosen file.

02Search Results Display

Acting on the suggestion of my mentor, I have also loaded the Pharo image with text versions of large books (Thank You Project Gutenberg 🙂 )  to test the working of the search function.

UPCOMING

  • GUI Modification
  • Integrated Exhaustive Testing
  • Addition of help/tutorial

PS: The GUI of the application is under constant evolvement, Kindly ignore the poorly structured window 😛

Stay tuned for more…
Post any queries , will be happy to help 🙂


GSoC 2015 with FOSSASIA – Mid-term report

TL;DR No Chicken Little, the sky is not falling.

Well. I’ve been selected for GSoC under organization FOSSASIA and I am working on the project sTeam Collaboration platform, mentored by awesome guys Martin and Aruna.

It is mid term already and as planned I am half way through the project. If you haven’t seen my past blogposts, go check them out to get clear idea of the project.sTeam is a document based collaboration platform. There is already an existing web interface for the platform. Interestingly REST APIs are being developed for the same and we planned to rewrite the web interface with AngularJS and make calls to the REST APIs.

Technology stack

  • bower for easy management of external modules. There are a lot of sub modules which are to be loaded and are not part of the angular itself. Though, some of the modules are bloated. The unnecessary files will be removed by using bower prune task with gulp.
  • angular-ui-router for handling deep nested routes. Interesting thing is, angular-ui-router works on state based concept and is very handy to maintain and route to certain state.
  • angular-ui-bootstrap gives us easy to use, clean and responsive UI blocks.
  • angular-local-storage We use it for saving the user’s login credentials and are sent to the API with every REST based call. This would be changed in future and session maintenace should be developed.
  • textAngular is lightweight and two way bound WYSIWYG Text Editor for handling plain text files. It can also handle source code, markdown, etc ..
  • ng-audio and ng-video for viewing audio and video files respectively.

Views

  • login and workarea are two base templates. And the router loads one of these based on the login credential value stored in local storage.
  • With workarea as base template, at this level, two nested views. Groups, which displays the groups which the user is part of and Private, where the user’s private documents are displayed.
  • The options view has various options like, permission management for the current level, copy, link, etc.. and also create room and document modals.
  • comments view fetches the comments for the current path. It is hidden if no permission to comment.

Controllers

  • loginCtrl for passing the credentials to the API, authenticate and parellely store them in localStorage. And all the other calls will use the stored value along with its payload. You know, REST is stateless! Session management is scoped to the API and is planned for future.
  • handler has functions for CRUD operations on the API. The functions do GET, PUT, POST, DELETE, .. on the passed paramater (which is the path to the room/document) and will return the value.
  • router handles the routes. It has base states with views loaded into each states with its own templates and controllers.
  • The run methods load are used for state change control.
  • workareaCtrl handles the scope for options loading and current level display in breadcrumb.
  • workspaceCtrl fetches and controls the main workspace which has the rooms, documents and containers displayed.
  • config has the hostname where the sTeam is deployed and change here is reflected systemwide for easy deployment.

Road ahead

  • Depending on the type (room/document), the appropriate view should be loaded and when document, the viewer/editor wrt to the mime type should be loaded. Follow the issue here – https://github.com/dolftax/sTeam-web-interface/issues/10
  • Implement search, document/room sorting based on Author, Title, document type and date.
  • Setup right sidebar which lists all the rooms (for easy navigation).
  • Settings popup for changes to attributes of the objects.
  • Automate tasks with certain gulp modules – gulp-angular-templatecache, gult-concat, gult-lint, gulp-uglify, ..
  • Write unit tests with mocha and chai.
  • Tidy up and add more documentation, which is already being done here –https://github.com/eMBee/sTeam/wiki/Installation-steps

Apart, we do scrum meet everyday. Check out the logs – http://dpaste.com/2A3J121

Currently, node-static module is used to serve the app and our development server is hosted in azure – http://steam-web.azurewebsites.net/

Note: The project is heavily under development and things might break.

Sign-up API is not implemented yet. Find some of the working screenshots below

Login

Private workarea

Groups

Create room

Create document

Future plans

The REST APIs are under development and a lot of features are yet to be developed. I have a brief listing of the yet to be developed APIs and the list grows eventually as we figure out something is missing.

Thats all for now. Will get back soon!

searchQuick Apprise: THREE #GoogleSummerOfCode #FOSSASIA

banner-gsoc2015.png.pagespeed.ce.1-XG35qq3R8SQJ5DGgL9

The intended “searchQuick” (sQuick) is an application to enable a user to search a set of books or texts, like an encyclopedia, or some other topical book collection offline built in the open source platform Pharo 4.0.

header



After the GUI was designed with minimal features, the next task was to develop the cardinal search function.

Indubitably, a well-run search application/engine requires indexing.

Search Application/Engine Indexing basically collects, parses and stores data to facilitate fast and accurate information retrieval.

That being, the index for sQuick was built using the Dictionary data structure in Pharo which works like HashTable of other programming languages/platforms.

index := Dictionary new.

Pharo describes a Dictionary as: “I represent a set of elements that can be viewed from one of the two perspectives: a set of associations, or a container of values that are extremely named where the name can be any object that responds to =. The external name is referred to as the key. I inherit many operations from the Set. “

The contents of the text files present in the current Pharo image were split at whitespaces and added to the index along with the corresponding file title.

tokens := ‘ ‘ split: aDocument contents.

The method #indexFiles was used to iterate over all the text files in the current Pharo image to index all the files before the searching begins.

Index

Dictionary Entries after File Content Indexing

The #queryString method has been temporarily build using #includesSubstring which matches the user input string with all the entries of the index and gives the result in an array form with #tally output as the number of search results.

Various test methods are now built to inspect the functioning of the methods designed. Continuous debugging is being done to check out and remove errors, if any 😉

UPCOMING:

  • Improve the indexing technique
  • Explore methods to quicken the search functionality
  • Integrate the search routine with the GUI already built
  • Design more test cases to develop a bug-free application

Stay tuned for more…
Post any queries , will be happy to help 🙂


TicTacToe Tutorial #FunWithPharo

reposted from jigyasagrover.wordpress.com/tictactoe-tutorial-funwithpharo

This tutorial has been included as a chapter in  Fun With Pharo!



Tic-tac-toe (or Noughts and crosses, Xs and Os) is a paper-and-pencil game for two players, X and O, who take turns marking the spaces in a 3×3 grid. The player who succeeds in placing three respective marks in a horizontal, vertical, or diagonal row wins the game.

Because of the simplicity of Tic-tac-toe, it is often used as a pedagogical tool for teaching the concepts of good sportsmanship and the branch of artificial intelligence that deals with the searching of game trees. It is straightforward to write a computer program to play Tic-tac-toe perfectly, to enumerate the 765 essentially different positions (the state space complexity), or the 26,830 possible games up to rotations and reflections (the game tree complexity) on this space.

t

So , here we make a Pharo version of this well-known game by using Morph. This post provides a step-by-step approach on how to go about building this simple application.

TTT2

A game package will be built having 3 subclasses :

  • TicTacToe
  • TicTacToeCell
  • TicTacToeModel

Initially , we have created TicTacToe a subclass of the Object class. The subclasses we will make will be combined in the package game as mentioned in the category: parameter.

Object subclass: #TicTacToe
instanceVariableNames: 'container model'
classVariableNames: ''
poolDictionaries: ''
category: 'game'

A category name is not required in order for the class to work, but you will not be able to access the class to make changes or to look at existing code unless you provide a category name. (The category name used can be a new category name or the name of an existing category.)

The poolDictionaries: parameter is seldom used and will not be discussed here, and the category: parameter specifies the category under which this class will be grouped in the system browser.

As we know, a class encapsulates data values and methods, and every object contains a set of the data values and can receive any of the methods as a message. The data values in each object are specified by providing a set of names of variables whose values will be an object’s internal data values. Each object has its own set of these values, and the set of data values for an object represents the object’s state (or value). The variables that contain the data values of an object are called the instance variables for the object, and the instanceVariableNames: parameter is a list of names, separated by blanks, for the instance variables. In the above code snippet , we have declared container and model as two instanceVariables.

The classVariableNames: parameter lists the identifiers that are the names of variables shared by the class and all of its objects. That is, there is only one set of these, and they are used by the class and all of its objects. Class variables (so called because they belong to the class, of which there is only one, rather than to the objects that are instances of the class) are rarely needed.

An example of a class variable that could be useful is in a case where we wanted a unique “serial number” to be assigned to each instance of the class as it is created. The variable containing the next available (or last used) serial number would appropriately be a class variable, and each time a new instance (object) is created the serial number would be recorded as an instance variable value in the object and the serial number in the class variable would be incremented. Thus, each object can be serially numbered as it is created (without using one of those nasty global variables!).

After executing the code above, class TicTacToe will exist. However, it will have no methods other than those that are inherited from class Object. To make it useful, we must add the methods that are needed for our implementation.

Adding methods to classes :

The subClasses interact by passing messages through objects only.

TicTacToe>>#initialize 
container := Morph new 
              layoutPolicy: TableLayout new; 
              color: Color transparent.
model := TicTacToeModel new:3.
self addRows.
self addControls.
^self.

The notation TicTacToe>>#initialize means that we have a method named initialize in the subclass TicTacToe.

In the initialize: method above , we have a container which is the instance of the class Morph (Morphic is the name given to Pharo’s graphical interface. ). We define the various attributes of the container such as layoutPolicy: and color:. model is another instance of the class TicTacToeModel which we will be creating further in this example.

self refers to the receiver of the message. It is usually used within a method to send additional messages to the receiver. self is frequently used when it is desired to pass the sender object (self), as a message argument, to a receiver who requires knowledege of the sender or who will in some way manipulate the sender.

In short, self refers to the object itself that defines the method.

TicTacToe>>#addRows
| rowMorph aCell rowCol |
1 to:3 do:[ :row |
rowMorph := Morph new layoutPolicy: RowLayout new.
1 to: 3 do: [ :col |
aCell := TicTacToeCell new.
aCell setModel: (model) row: row col: col.
rowMorph addMorph: aCell.
].
container addMorph: rowMorph.
]

The method addRows (the name is self explanatory) is used to add rows in the Tic Tac Toe grid. It declares temporary (local) variables rowMorph , aCell and rowCol which can’t be used beyond this method.

1 to:3 do:[ :row |

rowMorph := Morph new layoutPolicy: RowLayout new.

1 to: 3 do: [ :col |

aCell := TicTacToeCell new.

aCell setModel: (model) row: row col: col.

rowMorph addMorph: aCell.

].

The above code snippet works as a nested loop that runs thrice for each three rows to create a 3X3 grid as per requirement.

TicTacToe>>#addControls
| rowMorph newGameButton exitGameButton |
rowMorph := Morph new 
             layoutPolicy: RowLayout new; 
             color: Color transparent.
newGameButton := self createCtrlLabelled: 'New'    onClickExecutes: [self restart].
exitGameButton := self createCtrlLabelled: 'Exit'  onClickExecutes: [container delete].
rowMorph addMorph: exitGameButton.
rowMorph addMorph: newGameButton.
container addMorph: rowMorph.

This method adds controls to the game. The local variables are : rowMorph , newGameButton and exitGameButton.

rowMorph defines an instance of the class Morph which would be the placeholder for the two control buttons located at the top. The two control buttons are defined as New using the variable new GameButton which on click would restart the game , and Exit using the exitGameButton which on click would close the game. The buttons are created using a method createCtrlLabelled which we define next.

rowMorph addMorph: newGameButton adds the button to the Morph instance created earlier.

TicTacToe>>#createCtrlLabelled: aString onClickExecutes: aBlock
| aCtrlButton |
aCtrlButton := SimpleButtonMorph new label: aString.
aCtrlButton color: (Color black alpha: 0.2).
aCtrlButton extent: 120@50.
aCtrlButton on: #click send: #value to: aBlock.
^aCtrlButton.

TicTacToe>>#createCtrlLabelled: aString onClickExecutes: aBlock method makes a simple button using Morph adds label and control to it.

TicTacToe>>#open 
container openInWindow.

The open method defines as to how the game/TicTacToe class would open. Here we have defined it to open in a dialog box.

TicTacToe>>#restart
container delete.
Smalltalk garbageCollect.
TicTacToe new open.

It closes the game and calls for Garbage Collection (Garbage Collection (GC) is a form of automatic memory management. It finds data objects in a program that cannot be accessed in the future and reclaims the resources used by those objects.)

SimpleButtonMorph subclass: #TicTacToeCell
instanceVariableNames: 'parentModel rowNum colNum'
classVariableNames: ''
poolDictionaries: ''
category: 'game'

Here a subclass TicTacToeCell is defind in the SimpleButtonMorph class with parentModel , rowNum and colNum as the instance variables. This class defines the button for each cell of the grid.

TicTacToeCell>>#initialize 
super initialize.
self label: ''.
self extent: 80@80.
self color: Color yellow .
self on: #click send: #value to: (self onClickExecutionBlock).
^self.

This initialize method initialises the button size as 80X80 and gives it the color: yellow. An ‘onClick’ control is given to the button which then calls the onClickExecutionBlock method present in the same class.

TicTacToeCell>>#setModel: ticTacToeModel row: aRow col: aCol
parentModel := ticTacToeModel.
rowNum := aRow.
colNum := aCol.

The setModel: row: col: takes three arguments ticTacToeModel , aRow and aCol. The parentModel is assigned ticTacToeModel , roNum becomes the value of aRow and similiarly colNum has the value aCol.

TicTacToeCell>>#onClickExecutionBlock
^[
(self label size) == 0
ifTrue:[
self label: (parentModel updateAtRow: rowNum 
                Col: colNum).
parentModel checkWinCondition.
self extent: 80@80.
].
 ]

This method defines what should happen when each cell in the grid is clicked. At every click , the label of the cell is changed to X or O depending upon whose turn it is , the row numbers and coloumn numbers are updated in the parentModel and win condition is checked by calling the checkWinCondition method of the class TicTacToeModel defined next.

Matrix subclass: #TicTacToeModel
instanceVariableNames: 'filledCellCount currentFill winner'
classVariableNames: ''
poolDictionaries: ''
category: 'game'

A subclass TicTacToeModel is defined in the Matrix class with filledCellCount , currentFill and winner as the instance variables.

TicTacToeModel>>#initialize 
super initialize.
filledCellCount := 0.
currentFill := nil.
winner := nil.

This initialize methods defines that initially no cell in the grid is filled and there is no winner as of now.

TicTacToeModel>>#updateAtRow: r Col: c
currentFill == nil
ifTrue:[ currentFill := 'X'. ]
ifFalse:[
currentFill == 'X'
ifTrue: [ currentFill := 'O'. ]
ifFalse: [ currentFill := 'X'. ]
].
self at: r at: c put: currentFill.
filledCellCount := filledCellCount + 1.
^currentFill.

The updateRowAt: Col: method takes two arguments r and c used to update the currentFill and filledCellCount variables.

TicTacToeModel>>#checkWinCondition
filledCellCount >= 5 "for optimization. Win can occur minimum at 5th turn"
ifTrue: [
Transcript show: 'Yes'.
1 to: 3 do: [:idx |
self checkWinConditionInRow: idx.
self checkWinConditionInColumn: idx.
].
self checkWinConditionInDiagonals.
].
checkWinConditionInRow: rowNum
|set|
winner isNil
ifTrue: [
set := (self atRow: rowNum) asSet.
self checkWinConditionInSet: set
].
^winner.

The method checkWinCondition is self explanatory. It is used to check if we have a winner or not at every move.

TicTacToeModel>>#checkWinConditionInColumn: colNum
|set|
winner isNil
ifTrue: [
set := (self atColumn: colNum) asSet.
self checkWinConditionInSet: set.
].
^winner.
TicTacToeModel>>#checkWinConditionInDiagonals
|set1 set2 |
winner isNil
ifTrue: [
set1 := (self diagonal) asSet.
set2 := Set newFrom: {(self at: 1 at: 3). (self at: 2 at: 2). (self at: 3 at: 1)} asOrderedCollection.
self checkWinConditionInSet: set1.
self checkWinConditionInSet: set2.
].
^winner.
TicTacToeModel>>#checkWinConditionInSet: aSet
aSet size == 1
ifTrue: [
(aSet includes: 'X')
ifTrue: [
        winner := 'P1'. 
        Transcript open. 
        Transcript show: 'Player 1 is the winner!!'.
    ].

(aSet includes: 'O')

ifTrue: [
        winner := 'P2'.  
        Transcript open. 
        Transcript show: 'Player 2 is the winner!!'.
    ].
].

example2.

Now , we have made the game. To open the game , simply execute the following in the playground/workspace.

TicTacToe new open.

The messages : ‘Yes’ , ‘Player x is the winner’ will be displayed in the Transcript.

PS – This was just the basic implementation. I plan to improvise it further with graphics and other functionality/features.

Do like the post if it was helpful.
For any queries/suggestions please comment below.

Thank You

searchQuick Apprise: TWO #GoogleSummerOfCode #FOSSASIA

banner-gsoc2015.png.pagespeed.ce.1-XG35qq3R8SQJ5DGgL9

The intended “searchQuick” (sQuick) is an application to enable a user to search a set of books or texts, like an encyclopedia, or some other topical book collection offline built in the open source platform Pharo 4.0.

header



After building various mock-ups for a user friendly graphical interface for the application, the rudimentary features which would be present in the first release were finalized.

The chief features would include :

  • Search for word(s)
  • Browse files in the current image
  • Help or Tutorial
  • About section
  • Feedback or Suggestion Aid
  • Explore the code ( Cardinally Open Source 😉 )

Main Screen (copy)

LATEST MOCK UP OF GUI FOR sQuick

At this moment, the most viable options available (apart from the use of GTSpotter, Rubric or Bloc suggested by developers on the forum and #pharo IRC) include:

  • The use of Spec to build the UI which provides a comparatively easier option to implement Button Click Actions, User Input Search String Retrieval etc. But the graphical interface designed by placing the widgets is not a very fancy one and dependent on the current theme of the image.
  • The Morphic GUI gives the application a very pretty look in comparison, however the user input search string retrieval method is not a straight-forward one and is under construction.

After considering various pros and cons, the suitable alternative is considered to be the one made with Morph as it gives a refreshing look to the application.

UPCOMING:

  • Completion of GUI development
  • Commencement of Index build

Stay tuned for more…
Post any queries , will be happy to help 🙂


Starting with Smalltalk, Pharo and Spec

reposted from jigyasagrover.wordpress.com/starting-with-smalltalk-pharo-spec

Hi !

It’s been a few weeks since I started with Smalltalk, Pharo and Spec. Under the guidance of Mr. Martin Bähr, Mr. Sean DeNigris and people from the #pharo community (@thierry, @kilon, @maxleske) I have been able to learn Pharo in a systematic way. I have implemented the knowledge gained by building a few simple desktop applications using the resources available online.

This post intends to clear all your doubt regarding the basic definitions of Smalltalk, Pharo and Spec.

GETTING THE BASICS CLEARED:

Smalltalk is an object-oriented, dynamically typed, reflective programming language. It was designed and created in part for educational use, more so for constructionist learning. The language was first generally released as Smalltalk-80.

A Smalltalk environment is its own little world, designed around a conception of a computer with a minimal operating system and populated with living objects. A Smalltalk implementation is composed of an image (binary code), a major source file and a ‘changes’ file. The image is called Virtual Image (VI) because is independent form the platform you use for running Smalltalk. Smalltalk systems store the entire program state (including both Class and non-Class objects) in an image file. The image can then be loaded by the Smalltalk virtual machine to restore a Smalltalk-like system to a prior state.

As Sean DeNigris wrote to me: You may not realize it, but you have opened a portal to some of the greatest minds in the history of our industry. You have in your hands, not a programming language, but a live, dynamic, turtles-all-the-way-down environment designed to provide ‘support for the creative spirit in everyone’. More practically, Smalltalk is a programming tool that allows productivity unimaginable in most systems. And, if you put in enough time and effort to actually think in it, it will help you program better in any language you use.” ; Smalltalk is more dynamic and powerful than what one can think of.

Pharo is an open source implementation of the programming language and environment Smalltalk. Pharo is not Smalltalk. Pharo is Smalltalk-inspired.

Pharo offers strong live programming features such as immediate object manipulation, live update, and hot recompilation. Live programming environment is in the heart of the system. Pharo also supports advanced web development with frameworks such as Seaside and more recently Tide.

The official Pharo website defines it as: Pharo is a pure object-oriented programming language and a powerful environment, focused on simplicity and immediate feedback (think IDE and OS rolled into one).

Pharo relies on a virtual machine that is written almost entirely in Smalltalk itself.

Spec is a simple framework for describing User Interface (UI) for Pharo Smalltalk. It takes a model and a layout description, runs it through an interpreter and a UI is produced as a result. All the widget implemented this can then immediately be reused as any other widget.

It also allows the separation of concerns between the different parts of the user interface as expressed in the MVP pattern. Spec emphasis the reuse of the widgets as well as their customization.

I hope now you have got the classifications of Smalltalk , Pharo , Spec all cleared up which remains a basic doubt in every beginners mind.

INSTALLATION GUIDE:

Visit the official Pharo website’s download tab to get the desired version of Pharo for the corresponding OS.

For a step by step tutorial describing various ways to install Pharo in your system visit the ‘Installing Pharo in many flavors’ blog written in a very systematic manner by Guille Polito.

Follow the steps as given in Spec Documentation to install Spec in a Pharo Image.

RESOURCES :

Visit http://pharo.org/documentationto to get more resources to study from.

INTERESTING READS:

PS  –  Watch out this blog for tutorials to build basic desktop applications in Pharo.

Do like the post if it was helpful.
For any queries/suggestions please comment below.

Thank You

searchQuick Apprise: ONE #GoogleSummerOfCode #FOSSASIA

banner-gsoc2015.png.pagespeed.ce.1-XG35qq3R8SQJ5DGgL9

The intended “searchQuick” (sQuick) is an application to enable a user to search a set of books or texts, like an encyclopedia, or some other topical book collection offline built in the open source platform Pharo 4.0.

header



In the inceptive coding period of this project development the tasks achieved are as:

    • Designing the basic graphical user interface using Morphs in Pharo 4.0. The morphs elements utilized to make the interface elements included:
      – TextMorph for labels etc.
      – PluggableTextMorph to display the contents of the file
      – ImageMorph for background, header GIFs etc.
      – TextMorphForEditView to enter the search string.
      – SimpleButtonMorphs for creating buttons whose click will perform the desired action.
      – MenuMorph , MenuItemMorph to make the list of files available as ‘Browse’ menu.
      – DropListMorph to make a drop down list menu for the selection of languages.
    • Loading the files in the current Pharo image and making methods/classes that would directly access those files from the image and display their names as a menu list
    • Making a Metacello Configuration of the project for easy project loading in Pharo.
    • For further ease, the project configuration was directly added to the Meta Repo of Pharo 4.0 at SmalltalkHub.com and now the project can be directly loaded through Configuration Browser in Pharo 4.0

                  World > Tools > Configuration Browser > sQuick(jigyasa)

    • Removing the cache of the instance of the MainInterface so as to allow the users to open up many search/content windows simultaneously
    • Making of a content window that would display the file name and the file content when the file name is clicked from the ‘Browse Files‘ menu
    • Designing mock-ups for the UI for an enhanced user interface which include the latest search engine feel

mockup

UPCOMING:

  • Augmenting the UI for a pleasant user experience
  • Initiate working on the search tool / indexer build.

Stay tuned for more…
Post any queries , will be happy to help 🙂


Google Reunion in Silicon Valley with FOSSASIA

Being at the get together of more than 500 mentors and students of over 200 projects from 50 countries at the 10th anniversary of Google Summer of Code and join the celebrations at the Reunion 2014 is an amazing experience. It was the first time that Google brought together such a large number of contributors in Silicon Valley for a fantastic Unconference, a great day out at the “Great America” and a Gala at the San Jose Tech Museum with Linus Torvalds and a catering with an outstanding American Fusion cuisine.

Google Mentor Summit Tshirts

Yes, 10 years! Google Summer of Code is the only program of a company supporting hundreds of Open Source projects for many years and bringing them together with students from around the world. The magnitude of this support shows the real commitment of Google to Free and Open Source Software and I would like to thank everyone involved including Carol Smith, Cat Allman and Stephanie Taylor, and all the other fantastic people at the Open Source office supporting us.

The idea of free sharing and collaboration across borders has always inspired me. And I could not be happier to enter the conference room in San Jose – full of creators, developers, contributors of many amazing Open Source projects such as Mozilla, KDE, Python, Haiku, Blender, GNU, Debian, Inkscape and many more.

Google Reunion 2014 in San Jose with FOSSASIA

In previous years, the program brought together mentors of each active organization, but for this years celebration Google also flew in mentors of former years and even some students of the program. As an organizer of our annual FOSSASIA event I know what a challenge it can be to bring in a few dozen speakers from different parts of the world, but flying in 500 Open Source contributors from around the world is a logistic masterpiece. Organizing this event takes a huge amount effort and resources. Two thumbs up for the organizing team, they did an amazing job. I am grateful to be among the participants.

Great Day Out at the Great America

Every year the Mentor Summit spreads out in two days filled with interesting unconference sessions, lighting talks, and plenty of spaces for group discussing and code sprints. This time Carol and the team went an extra mile to surprise participants with an additional day-out at the Great America Theme Park (exclusively for us!). Believe it or not the majority of my lovely geek friends apparently have never been to an amusement park in their lives. We had such a great morning and afternoon there. I am sure some of us will never forget that very first roller coaster ride. It is great that Google makes this experience possible for mentors and appreciates their contributions.

Google Reunion 2014 in San Jose / Mentor Summit USA

Gala at the Tech Museum San Jose with Linus Torvalds

Another of the highlights of this year was the Gala at the Tech Museum in San Jose. Everyone dressed up in beautiful garments. It was fun to see all the developers who kind of always wear black shirts suddenly dressed up. And, on top of organizing everything the team also arranged a meetup with a star of the Free and Open Source community: Linus Torvalds joined us as a special guest. Of course Linus was everyones hero. And I was thrilled to meet him and Dirk Hohndel just before their talk. Sincerely thanks to Cat Allman for introducing him. I took the chance to invite them to our next FOSSASIA in Singapore, which will take place from March 13-15, 2015.

Linus Torvalds FOSSASIA Meetup at Google Reunion with Hong Phuc Dang, Dirk Hohndel, Mario Behling

After the interesting talks about the history of Linux, Open Source at Google and future projects, we experienced the interactive exhibits at the Tech Museum and enjoyed more of the yummy food. Coming from Asia, experiencing the food in the US is always very special for me. Especially in Silicon Valley and San Francisco I love the Fusion food, the blend of Western food and Asian cuisine. On the night of the party, the Google team really did arrange a fantastic catering with very friendly caterers, who knew a lot about all the different ingredients. I learned from Stephanie that this was one of the best catering companies and that they came all the way from San Francisco. It was truly special indeed.

Participants at the Reunion

Personally I was so excited to meet with the developer team of Processing at the Google Reunion. Processing is one of my favorite software applications. One team member – Andres Colubri from Argentina – told me he finally met his friend and co-developer whom he worked together with during the last 7 years but never got a chance to meet.

Some voices of participants of this years summit: Doris Lee, a first year GSoC from Taiwan said: ”The program is a great way to practice and apply what I have learned in programming. I took computer science at UC Berkeley but I never had the feeling I get the right assignments to work on. I enjoyed so much to work with GSoC program which gives me a chance to improve my coding skill, to learn how to use Git, Python and much more.”

Google Mentor Summit FOSSASIA, Hong Phuc Dang, Doris Lee

Adnan Zahid – 2nd year GSoC student also commented: “It is good that Google created the program for public benefits and I wish this program can be extended not only during summer but throughout the entire year. My suggestion is to create cooperation between Open Source projects and universities so that the schools constantly receive assignments and then distribute them to students”

Hamish Bowman from OSGeo said: “We are participating at GSoC for many years and I am happy to see new and old faces at the Reunion. For me the mentor summit is a chance to meet developers from projects, that we are using and working together with. Many of them, we would not be able to meet some anywhere else. After a long time, I had the chance to talk again with Mario Behling who is working with lots of projects and founded Lubuntu. It was great to see Mario’s excitement when I showed him our OSGeo Live distro which we build on top of Lubuntu.”

Google Reunion Hamish Bowman and Mario Behling Lubuntu Founder

I also spoke with one of the most senior mentors – Kevin Krammer from KDE, it was Kevin’s 10th time mentoring. He said: “This is a fantastic thing. I appreciate the opportunity to be mentor. I think we had very good students who have helped KDE a lot during the past few years. GSoC gives us the possibility to experiment new things for which we normally do not have enough resources and this is a great training opportunity as well.”

 

The closure Q&A session marked another year of GSoC was over. We are all looking forward to another 10, 20, 30 …years to come. Once again congratulations to GSoC 10th Anniversary!

Links:

FOSSASIA http://fossasia.org

Google Melange http://google-melange.com