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  • Updating the Jpanel of a class

    - by ivor
    Hi, After some advice on using jpanel - I'm new to java and playing around with the GUI elements. Bascially what I'm curious about is if I can set up a Jpanel in one class, then somehow add labels etc to the that container, but from another class. Is this possible ? or do i have to set the entire GUI up in one class, but then I guess I would have the same issue, if I wanted to update those fields I had set up in the main class from another class? Apologies I don't really have any code that's usefull to demostrate here - I'm just trying to get the idea going, working out if its possible before I go ahead. And I'm not even sure if this is possible. Any advice would be greatly appreciated. Thanks

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  • C# Dispatcher {"The calling thread cannot access this object because a different thread owns it."}

    - by user359446
    Hi, first I need to say that I´m noob with WPF and C#. Application: Create Mandelbrot Image (GUI) My disptacher works perfektly this this case: private void progressBarRefresh(){ while ((con.Progress) < 99) { progressBar1.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { progressBar1.Value = con.Progress; } )); } } I get the Message (Title) when tring to do this with the below code: bmp = BitmapSource.Create(width, height, 96, 96, pf, null, rawImage, stride); this.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { img.Source = bmp; ViewBox.Child = img; //vllt am schluss } )); I will try to explain how my program works. I created a new Thread (because GUI dont response) for the calculation of the pixels and the colors. In this Thread(Mehtod) I´m using the Dispatcher to Refresh my Image in the ViewBox after the calculations are ready. When I´m dont put the calculation in a seperate Thread then I can refresh or build my Image. PS: Sry for my bad english

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  • Analog of Java Form Layout in Qt

    - by Narek
    Once I have programmed GUI with Java and have used Form Layouts. Form layout (if I am not mistaken that is from SWT library) made possible to give right, left, top and bottom adges of any GUI element (widget) with respect to other widgets in the same widget (parent widget) or with respect to the adges of parent widget. So it was possible to control the future of widgets that are inside of another one, when that "another widget" is being resized. In Qt I have find the QFormLayout which is similar to Java one, but seems I can't handle with widgets as flexible in terms of relative positioning, as it was with Java's Form Layout. So are there any other means to give a widget position with respect to the others (without overloading resizeEvent function) as that was in Java? Thanks.

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  • How to restart Linux from inside a C++ program?

    - by Dave K
    I have a Qt 4 GUI where I need to have a option in a drop-down menu that allows the user to choose to restart the computer. I realize this might seem redunant with the ability to restart the computer in other ways, but the choice needs to stay there. I've tried using system() to call the following: a suid-root shell script a non-suid shell script a suid-root binary program and all of them just cause reboot: must be superuser to be printed. Using system() to call reboot directly does the same thing. I'm not especially attached to using system() to do this, but it seemed like the most direct choice. How can I reboot the system from the GUI?

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  • Changing a Widget's name based on a string read in from an XML form in Qt.

    - by Nick
    I'm writing a code for a voting machine that will allow user to read in custom XML ballots and then vote on them, however in the current build I have in QtCreator, I don't see an easy way to edit buttons in my GUI directly. In the code snippet below, I assign an element to pull out the names and type of ballot being read in, but I need to append a label on the GUI as well as change buttons to the names of candidates read in. Any ideas on how to do this? while(!n.isNull()){ QDomNode x = n.firstChildElement(); QDomElement e = n.toElement(); QMessageBox::information(0, tr( "Loading Element" ), tr( "Our element is %1" ).arg(e.tagName()) ); QDomElement p = x.firstChildElement();//p finds Races QMessageBox::information(0,tr("Foo"),tr("p = %1").arg(p.text()));//finds Race and Ballot types n = n.nextSibling(); } }

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  • Dispatcher.CheckAccess() isn't working from my console application, is there a better way.

    - by zimmer62
    I wrote an application in WPF / VB and separated the business logic and UI into different projects. The business layer uses a serial port which runs on a different thread, Now that I'm trying to write a command line interface for the same business layer, it seems to fail when .Invoke() is called. (no error, just doesn't work) I'm pretty sure the reason I had to add in checkaccess and .invoke was because I have collections that would be changed during processing the serial port data and wanted the NotifyCollectionChanged to be handled by WPF data binding. (The reason I'm not 100% sure is because it was months ago I wrote that part and it all worked great from the GUI, now adding the console app has made me rethink some of this) I would like my business layer to run these processes on the thread they were created, I need this to work from both my GUI version and the command line version. Am I misusing the Dispatcher in my business layer? Is there a better way to handle an event from the serial port, and then return to the main thread to processes the data?

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  • Getting started with a new iMac...

    - by Moshe
    I'm on my first Apple computer, a shiny new 21.5" iMac. I am not unfamiliar with OS X as I have been using a borrowed MacBook for a few months. Considering that this is my machine, I am more comfortable "settling in". I would like to get recommendations for software to install on it, other possible uses and whatnot. I bought it primarily for iPhone development, but I make videos on my beast of a PC using Adobe Premiere CS3. What software is recommended for me to download for the aforementioned as well as photo editing, graphic design and web design? Bear in mind that this machine will NOT have steady internet access and that I'm looking for freeware only. THANKS!

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  • Setting up a lab with Windows 2003 server and windows 7 clients

    - by Tathagata
    We are overhauling a lab with new machines with Windows 7 (as clients - around 150 of them). In the current infrastructure we have students logging in using a generic student id (as having individual student accounts doesn't really serve any additional purpose). This account, as you would imagine is a locked down one that can run a few (age old) softwares required by students in the class. Currently, the individual machines have XP images created by BartPE. What should be an ideal infrastructure design to cater to such a need with Windows Server 2003 and Windows 7 clients? It would be great if you can give me pointers to what concepts and background I need to have (like GPO), any design guidelines, best practices?

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  • Missing menu items for Azure SQL tables within SQL Server Management Studio?

    - by Sid
    I have a table (say Table1) that is replicated via SQL Data Sync Agent across a local SQL Server 2012 as well as an Azure SQL Server (part of Microsoft Azure). Everything about Table1 (schema, table values etc ) is identical to the best of my understanding. However, when I list and right click Table1 from Microsoft SQL Server Management Studio 2012 (SSMS), I get some very different menu options, even for seemingly basic stuff. Lets focus only on the 'Design' menu item: It is visible for Table1 on the local SQL server in SSMS It is missing for Table1 on Azure SQL via SSMS It is visible for Table1 (as Open Table Definition) on Azure SQL when reaching it via Visual Studio 2012 (Server Explorer - Data connections) This is seen in the screenshots below: Now I use scripts from some real stuff (esp when I need to check in the SQL scripts etc) but this difference concerns me to some extent. Am I witnessing just a tools artifact in SQL Server Management Studio when connecting to Azure SQL? or is it something more serious about limitations of Azure SQL itself (although, just seeing the Design surface is so basic!)?

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  • How to copy a button with shadow effect from PSD to PNG

    - by Alex
    I got a web site design in PSD file from a web-designer. All element s there snap to guides, which is handy when I make a selection to copy an element of design to a PNG file: guides make my selection precise. One button there has two states: normal and hover. Both states contains of several layers. So I am trying to copy both states as PNG files in order to make a nice button in html. The problem is that both states have shadow effects, which go beyond the layers' edges, i.e. when I try to select a button my selection (snapped to guides) does not include an outer part of the shadow. How do I make a precise selection of the button state in such situation?

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  • Book Recommendations for Technical/Solutions Architecture [closed]

    - by giant_squid
    I wish to learn more about Technical and Solutions Architecture. Specifically, I'm concerned with designing HA, Fault-Tolerant Scalable web-based solutions (enough buzzwords ;-). Its a topic I'm familiar with on a technical level having worked as a sysadmin, but I don't know all the buzzwords Architects use and have to brush up on my UML and diagram techniques. I would like a book that describes what architecture is as a discipline and explores standard design patterns, and some do's and don'ts. Do you have any recommendations? I apologise if this sounds vague, its because I am still learning what Architecture is as a discipline having come from a sysadmin background. To be 100% clear I'm looking for books or websites that give broad overviews of what System Design patterns exist and how the discipline works. Thanks Instead of closing the question maybe you could comment on what exactly about it you don't like.

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  • Microsoft guarantees the performance of SQL Server

    - by simonsabin
    I have recently been informed that Microsoft will be guaranteeing the performance of SQL Server. Yes thats right Microsoft will guarantee that you will get better performance out of SQL Server that any other competitor system. However on the flip side there are also saying that end users also have to guarantee the performance of SQL Server if they want to use the next release of SQL Server targeted for 2011 or 2012. It appears that a recent recruit Mark Smith from Newcastle, England will be heading a new team that will be making sure you are running SQL Server on adequate hardware and making sure you are developing your applications according to best practices. The Performance Enforcement Team (SQLPET) will be a global group headed by mark that will oversee two other groups the existing Customer Advisory Team (SQLCAT) and another new team the Design and Operation Group (SQLDOG). Mark informed me that the team was originally thought out during Yukon and was going to be an independent body that went round to customers making sure they didn’t suffer performance problems. However it was felt that they needed to wait a few releases until SQL Server was really there. The original Yukon Independent Performance Enhancement Team (YIPET) has now become the SQL Performance Enforcement Team (SQLPET). When challenged about the change from enhancement to enforcement Mark was unwilling to comment. An anonymous source suggested that "..Microsoft is sick of the bad press SQL Server gets for performance when the performance problems are normally down to people developing applications badly and using inadequate hardware..." Its true that it is very easy to install and run SQL, unlike other RDMS systems and the flip side is that its also easy to get into performance problems due to under specified hardware and bad design. Its not yet confirmed if this enforcement will apply to all SKUs or just the high end ones. I would personally welcome some level of architectural and hardware advice service that clients would be able to turn to, in order to justify getting the appropriate hardware at the start of a project and not 1 year in when its often too late.

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  • How to Install Mac OS X Lion on Your HP ProBook (or Compatible Laptop)

    - by Usman
    There’s nothing more satisfying than building a hackintosh, i.e. installing Mac OS X on a non-Apple machine. Although it isn’t as easy as it sounds, but the end result is worth the effort. Building a PC with specific components and installing Mac OS X on it can save you thousands of dollars you might spend on a real Mac. And now, it’s time to step into the portable world. Today we will show how you can turn an HP ProBook (or any compatible Sandy Bridge laptop) into a 95% MacBook Pro! Why should (or shouldn’t) you do it? Let’s clarify whether or not it should be done. Firstly, we all know Apple makes awesome laptops. The design, build quality, and the aesthetics (not to mention, the glowing Apple) would make you crave for one. Secondly, all these Apple laptops are bundled with Mac OS X, which (for some people) is the most user-friendly and annoyance-free operating system. Digital artists, musicians, video editors, they all prefer Mac for a reason. So the verdict is, if hardware design is what you really look for, you should get a real Mac, and we are not at all stopping you from doing so. But if you’re only concerned with the OS (and saving a few bucks in your pocket), you may consider giving this a shot. But remember, it may not perform as good as a real Mac does. The results vary, so hope for the best, and proceed with caution. Why HP ProBook? How to Convert News Feeds to Ebooks with Calibre How To Customize Your Wallpaper with Google Image Searches, RSS Feeds, and More 47 Keyboard Shortcuts That Work in All Web Browsers

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  • Database version control resources

    - by Wes McClure
    In the process of creating my own DB VCS tool tsqlmigrations.codeplex.com I ran into several good resources to help guide me along the way in reviewing existing offerings and in concepts that would be needed in a good DB VCS.  This is my list of helpful links that others can use to understand some of the concepts and some of the tools in existence.  In the next few posts I will try to explain how I used these to create TSqlMigrations.   Blogs entries Three rules for database work - K. Scott Allen http://odetocode.com/blogs/scott/archive/2008/01/30/three-rules-for-database-work.aspx Versioning databases - the baseline http://odetocode.com/blogs/scott/archive/2008/01/31/versioning-databases-the-baseline.aspx Versioning databases - change scripts http://odetocode.com/blogs/scott/archive/2008/02/02/versioning-databases-change-scripts.aspx Versioning databases - views, stored procedures and the like http://odetocode.com/blogs/scott/archive/2008/02/02/versioning-databases-views-stored-procedures-and-the-like.aspx Versioning databases - branching and merging http://odetocode.com/blogs/scott/archive/2008/02/03/versioning-databases-branching-and-merging.aspx Evolutionary Database Design - Martin Fowler http://martinfowler.com/articles/evodb.html Are database migration frameworks worth the effort? - Good challenges http://www.ridgway.co.za/archive/2009/01/03/are-database-migration-frameworks-worth-the-effort.aspx Continuous Integration (in general) http://martinfowler.com/articles/continuousIntegration.html http://martinfowler.com/articles/originalContinuousIntegration.html Is Your Database Under Version Control? http://www.codinghorror.com/blog/archives/000743.html 11 Tools for Database Versioning http://secretgeek.net/dbcontrol.asp How to do database source control and builds http://mikehadlow.blogspot.com/2006/09/how-to-do-database-source-control-and.html .Net Database Migration Tool Roundup http://flux88.com/blog/net-database-migration-tool-roundup/ Books Book Description Refactoring Databases: Evolutionary Database Design Martin Fowler signature series on refactoring databases. Book site: http://databaserefactoring.com/ Recipes for Continuous Database Integration: Evolutionary Database Development (Digital Short Cut) A good question/answer layout of common problems and solutions with database version control. http://www.informit.com/store/product.aspx?isbn=032150206X

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  • How would the optimal Emacs-keyboard look like?

    - by Thorsten
    Emacs is a historic piece of software. It promises outstanding productivity for keyboard wizards that really want to explore it's power. The effective use of the keyboard is key to Emacs productivity, but the keyboard hardware has changed a lot since the old days, so many modern Emacs users are struggling with weird 'Emacs chords' on their Windows/IBM keyboards. If one would design a keyboard that is entirely focused on the needs of Emacs users - how would it look like? I assume the following: the standard keybindings of Emacs are accepted, redefinitions are rare exceptions we are only talking about QWERTY keyboards (including regional variations like QWERTZ) we are only considering users applying the (10 fingers) touch typing system. the question is not only about remapping the keys of existing keyboards (perfectly possible on Linux with .xmodmap and on Windows with keytweak, for example) - think about the perfect keyboard-hardware you would like to see on your desk while hacking in Emacs all day long. Please tag your answer with your locale, i.e. [en] or [de], so that everybody knows what regional layout you are using. I will answer my own question below, to show you the results of some investigation and experimentation, but I really would like to read about different approaches and their pro's and con's. The emacswiki has a somehow related page with a lot of links (http://www.emacswiki.org/emacs/RepeatedStrainInjury), but here it's about optimal keyboard design for maximal productivity, assuming avoidance of RSI as a byproduct.

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  • How do I fix "bzr: ERROR: Unable to determine your name. "?

    - by Daniel
    I am trying to quickly create my first app and am getting gtk errors when I try to run or create an application. Here is a copy of what I executed and what results I got: daniel@laptop:~/PyDevelopment$ quickly create ubuntu-application app001 Creating project directory app001 Creating bzr repository and committing Launching your newly created project! /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `App001Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) Congrats, your new project is setup! cd /home/daniel/PyDevelopment/app001/ to start hacking. daniel@laptop:~/PyDevelopment$ cd app001 daniel@laptop:~/PyDevelopment/app001$ quickly design daniel@laptop:~/PyDevelopment/app001$ quickly rub ERROR: No rub command found in template ubuntu-application. Candidate commands are: add, commands, configure, create, debug, design, edit, getstarted, help, license, package, quickly, release, run, save, share, submitubuntu, test, tutorial, upgrade daniel@laptop:~/PyDevelopment/app001$ quickly run /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `App001Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) daniel@laptop:~/PyDevelopment/app001$ quickly package .......Ubuntu packaging created in debian/ ....... ---------------------------------- Command returned some ERRORS: ---------------------------------- bzr: ERROR: Unable to determine your name. ---------------------------------- ERROR: can't create or update ubuntu package ERROR: package command failed Aborting

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  • What code smell best describes this code?

    - by Paul Stovell
    Suppose you have this code in a class: private DataContext _context; public Customer[] GetCustomers() { GetContext(); return _context.Customers.ToArray(); } public Order[] GetOrders() { GetContext(); return _context.Customers.ToArray(); } // For the sake of this example, a new DataContext is *required* // for every public method call private void GetContext() { if (_context != null) { _context.Dispose(); } _context = new DataContext(); } This code isn't thread-safe - if two calls to GetOrders/GetCustomers are made at the same time from different threads, they may end up using the same context, or the context could be disposed while being used. Even if this bug didn't exist, however, it still "smells" like bad code. A much better design would be for GetContext to always return a new instance of DataContext and to get rid of the private field, and to dispose of the instance when done. Changing from an inappropriate private field to a local variable feels like a better solution. I've looked over the code smell lists and can't find one that describes this. In the past I've thought of it as temporal coupling, but the Wikipedia description suggests that's not the term: Temporal coupling When two actions are bundled together into one module just because they happen to occur at the same time. This page discusses temporal coupling, but the example is the public API of a class, while my question is about the internal design. Does this smell have a name? Or is it simply "buggy code"?

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  • The Making of Arduino [Geek History]

    - by Jason Fitzpatrick
    The open-source Arduino board is the heart of thousands of different DIY projects–it would be easy to think that the Arduino has always been around. The ubiquitous little hobby board, however, is but a scant six years old. At technology blog IEEESpectrum they delve into the history of the Arduino board and its quiet origins in a small Italian town. Here’s an excerpt from their lengthy write up about the the origin and history of the beloved Arduino: Arduino is a low-cost microcontroller board that lets even a novice do really amazing things. You can connect an Arduino to all kinds of sensors, lights, motors, and other devices and use easy-to-learn software to program how your creation will behave. You can build an interactive display or a mobile robot and then share your design with the world by posting it on the Net. Released in 2005 as a modest tool for Banzi’s students at the Interaction Design Institute Ivrea (IDII), Arduino has spawned an international do-it-yourself revolution in electronics. You can buy an Arduino board for just about US $30 or build your own from scratch: All hardware schematics and source code are available for free under public licenses. As a result, Arduino has become the most influential open-source hardware movement of its time. The little board is now the go-to gear for artists, hobbyists, students, and anyone with a gadgetry dream. More than 250 000 Arduino boards have been sold around the world—and that doesn’t include the reams of clones. “It made it possible for people do things they wouldn’t have done otherwise,” says David A. Mellis, who was a student at IDII before pursuing graduate work at the MIT Media Lab and is the lead software developer of Arduino. HTG Explains: Understanding Routers, Switches, and Network Hardware How to Use Offline Files in Windows to Cache Your Networked Files Offline How to See What Web Sites Your Computer is Secretly Connecting To

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  • Overriding GetHashCode in a mutable struct - What NOT to do?

    - by Kyle Baran
    I am using the XNA Framework to make a learning project. It has a Point struct which exposes an X and Y value; for the purpose of optimization, it breaks the rules for proper struct design, since its a mutable struct. As Marc Gravell, John Skeet, and Eric Lippert point out in their respective posts about GetHashCode() (which Point overrides), this is a rather bad thing, since if an object's values change while its contained in a hashmap (ie, LINQ queries), it can become "lost". However, I am making my own Point3D struct, following the design of Point as a guideline. Thus, it too is a mutable struct which overrides GetHashCode(). The only difference is that mine exposes and int for X, Y, and Z values, but is fundamentally the same. The signatures are below: public struct Point3D : IEquatable<Point3D> { public int X; public int Y; public int Z; public static bool operator !=(Point3D a, Point3D b) { } public static bool operator ==(Point3D a, Point3D b) { } public Point3D Zero { get; } public override int GetHashCode() { } public override bool Equals(object obj) { } public bool Equals(Point3D other) { } public override string ToString() { } } I have tried to break my struct in the way they describe, namely by storing it in a List<Point3D>, as well as changing the value via a method using ref, but I did not encounter they behavior they warn about (maybe a pointer might allow me to break it?). Am I being too cautious in my approach, or should I be okay to use it as is?

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  • Minty Bug: Build an FM Bug Inside a Mint Container

    - by ETC
    Electronics projects that have real world (and showing off to your friends) potential are the most fun; today we take a look at a clever FM bug design hidden in a mint container. At PyroElectro Projects they wanted to try something new with the whole electronics-in-mint-container genre. They opted to turn a container of Ice Breakers Frost mints (the Ice Breakers response to Altoid Mints, presumably) into a small FM bug. The most clever part of the design is that the container still holds mints. Aside from a small black dot on the back of the case you’d have little reason to believe it was anything buy a box of mints. Check out the video below to see the mint container unpacked and the hidden electronics payload revealed: If you’re interested in the project hit up the link below for additional information. FM Bug Transmitter Mint Box [Pyro Electro Projects via Hack A Day] Latest Features How-To Geek ETC How to Get Amazing Color from Photos in Photoshop, GIMP, and Paint.NET Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? Get the MakeUseOf eBook Guide to Hacker Proofing Your PC Sync Your Windows Computer with Your Ubuntu One Account [Desktop Client] Awesome 10 Meter Curved Touchscreen at the University of Groningen [Video] TV Antenna Helper Makes HDTV Antenna Calibration a Snap Turn a Green Laser into a Microscope Projector [Science] The Open Road Awaits [Wallpaper]

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  • How do I get information about the level to the player object?

    - by pangaea
    I have a design problem with my Player and Level class in my game. So below is a picture of the game. The problem is I don't want to move on the black space and only the white space. I know how to do this as all I need to do is get the check for the sf::Color::Black and I have methods to do this in the Level class. The problem is this piece of code void Game::input() { player.input(); } void Game::update() { (*level).update(); player.update(); } void Game::render() { (*level).render(); player.render(); } So as you there is a problem in that how do I get the map information from the Level class to the Player class. Now I was thinking if I made the Player position static and pass it into the Level as parameter in update I could do it. The problem is interaction. I don't know what to do. I could maybe make player go into the Level class. However, what if I want multiple levels? So I have big design problems that I'm trying to solve.

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  • Creating an email notification system based on polling database rows

    - by Ashish Sharma
    I have to design an email notification system based on the following requirements: The email notifications would be created based on polling rows in a Mysql 5.5 DB table when they are in a particular 'Completed' state. The email notification should be sent out in no more than 5 minutes from the time the row was created in the DB table (At the time of DB table row creation the state of the row might not be 'Completed'). Once 5 minutes for the DB table row expire in reaching the 'Completed' state, separate email notification need to be sent (basically telling the user that the original email notification would be delayed) and then sending the email notification as and when the row state reaches to being 'Completed'. The rest of the system requirements are : Adding relevant checks to monitor the whole system via MBeans interface. The system should be scalable so that if the rate of DB table rows creation increases so does the Email notification system be able to ramp up. So I request suggestions on following lines: What approach should I take in solving the problem described from a programming/Design pattern point of view? Suggestion for any third party plugin/software that can be used to solve the problem described? Points to take care regarding scalability and monitoring the health of the system? Java is the language of preference but I am open to using off the shelf components that can be interfaced with Java language or provide standard ports for communication. Currently I do have an in house grown system (written in Java) that is catering to the specified requirements, but it's now crumbling under increased load and now I want to give the problem a fresh look. thanks in advance Ashish

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  • Frederick .NET User Group June 2010 Meeting

    - by John Blumenauer
    FredNUG is pleased to announce our June speaker will be Pete Brown.  Pete was one FredNUG’s first speakers when the group started and we’re very happy to have him visiting us again to present on Silverlight!  On June 15th @ 6:30 PM, we’ll start with a Visual Studio 2010 Launch with pizza, swag and a presentation about what makes Visual Studio 2010 great.  Then, starting at 7 PM, Pete Brown will present “What’s New in Silverlight 4.”  It looks like a evening filled with newness!   The scheduled agenda is:   6:30 PM - 7:15 PM – Visual Studio 2010 Launch Event plus Pizza/Social Networking/Announcements 7:15 PM - 8:30 PM - Main Topic: What’s New in Silverlight 4 with Pete Brown  Main Topic:  What’s New in Silverlight 4? Speaker Bio: Pete Brown is a Senior Program Manager with Microsoft on the developer community team led by Scott Hanselman, as well as a former Microsoft Silverlight MVP, INETA speaker, and RIA Architect for Applied Information Sciences, where he worked for over 13 years. Pete's focus at Microsoft is the community around client application development (WPF, Silverlight, Windows Phone, Surface, Windows Forms, C++, Native Windows API and more). From his first sprite graphics and custom character sets on the Commodore 64 to 3d modeling and design through to Silverlight, Surface, XNA, and WPF, Pete has always had a deep interest in programming, design, and user experience. His involvement in Silverlight goes back to the Silverlight 1.1 alpha application that he co-wrote and put into production in July 2007. Pete has been programming for fun since 1984, and professionally since 1992. In his spare time, Pete enjoys programming, blogging, designing and building his own woodworking projects and raising his two children with his wife in the suburbs of Maryland. Pete's site and blog is at 10rem.net, and you can follow him on Twitter at http://twitter.com/pete_brown Twitter: http://twitter.com/pete_brown Facebook: http://www.facebook.com/pmbrown Pete is a founding member of the CapArea .NET Silverlight SIG. (Visit the CapArea. NET Silverlight SIG here )    8:30 PM - 8:45 PM – RAFFLE! Please join us and get involved in our .NET developers community!

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  • 10 Reasons Why Java is the Top Embedded Platform

    - by Roger Brinkley
    With the release of Oracle ME Embedded 3.2 and Oracle Java Embedded Suite, Java is now ready to fully move into the embedded developer space, what many have called the "Internet of Things". Here are 10 reasons why Java is the top embedded platform. 1. Decouples software development from hardware development cycle Development is typically split between both hardware and software in a traditional design flow . This leads to complicated co-design and requires prototype hardware to be built. This parallel and interdependent hardware / software design process typically leads to two or more re-development phases. With Embedded Java, all specific work is carried out in software, with the (processor) hardware implementation fully decoupled. This with eliminate or at least reduces the need for re-spins of software or hardware and the original development efforts can be carried forward directly into product development and validation. 2. Development and testing can be done (mostly) using standard desktop systems through emulation Because the software and hardware are decoupled it now becomes easier to test the software long before it reaches the hardware through hardware emulation. Emulation is the ability of a program in an electronic device to imitate another program or device. In the past Java tools like the Java ME SDK and the SunSPOTs Solarium provided developers with emulation for a complete set of mobile telelphones and SunSpots. This often included network interaction or in the case of SunSPOTs radio communication. What emulation does is speed up the development cycle by refining the software development process without the need of hardware. The software is fixed, redefined, and refactored without the timely expense of hardware testing. With tools like the Java ME 3.2 SDK, Embedded Java applications can be be quickly developed on Windows based platforms. In the end of course developers should do a full set of testing on the hardware as incompatibilities between emulators and hardware will exist, but the amount of time to do this should be significantly reduced. 3. Highly productive language, APIs, runtime, and tools mean quick time to market Charles Nutter probably said it best in twitter blog when he tweeted, "Every time I see a piece of C code I need to port, my heart dies a little. Then I port it to 1/4 as much Java, and feel better." The Java environment is a very complex combination of a Java Virtual Machine, the Java Language, and it's robust APIs. Combine that with the Java ME SDK for small devices or just Netbeans for the larger devices and you have a development environment where development time is reduced significantly meaning the product can be shipped sooner. Of course this is assuming that the engineers don't get slap happy adding new features given the extra time they'll have.  4. Create high-performance, portable, secure, robust, cross-platform applications easily The latest JIT compilers for the Oracle JVM approach the speed of C/C++ code, and in some memory allocation intensive circumstances, exceed it. And specifically for the embedded devices both ME Embedded and SE Embedded have been optimized for the smaller footprints.  In portability Java uses Bytecode to make the language platform independent. This creates a write once run anywhere environment that allows you to develop on one platform and execute on others and avoids a platform vendor lock in. For security, Java achieves protection by confining a Java program to a Java execution environment and not allowing it to access other parts of computer.  In variety of systems the program must execute reliably to be robust. Finally, Oracle Java ME Embedded is a cross-industry and cross-platform product optimized in release version 3.2 for chipsets based on the ARM architectures. Similarly Oracle Java SE Embedded works on a variety of ARM V5, V6, and V7, X86 and Power Architecture Linux. 5. Java isolates your apps from language and platform variations (e.g. C/C++, kernel, libc differences) This has been a key factor in Java from day one. Developers write to Java and don't have to worry about underlying differences in the platform variations. Those platform variations are being managed by the JVM. Gone are the C/C++ problems like memory corruptions, stack overflows, and other such bugs which are extremely difficult to isolate. Of course this doesn't imply that you won't be able to get away from native code completely. There could be some situations where you have to write native code in either assembler or C/C++. But those instances should be limited. 6. Most popular embedded processors supported allowing design flexibility Java SE Embedded is now available on ARM V5, V6, and V7 along with Linux on X86 and Power Architecture platforms. Java ME Embedded is available on system based on ARM architecture SOCs with low memory footprints and a device emulation environment for x86/Windows desktop computers, integrated with the Java ME SDK 3.2. A standard binary of Oracle Java ME Embedded 3.2 for ARM KEIL development boards based on ARM Cortex M-3/4 (KEIL MCBSTM32F200 using ST Micro SOC STM32F207IG) will soon be available for download from the Oracle Technology Network (OTN). 7. Support for key embedded features (low footprint, power mgmt., low latency, etc) All embedded devices by there very nature are constrained in some way. Economics may dictate a device with a less RAM and ROM. The CPU needs can dictate a less powerful device. Power consumption is another major resource in some embedded devices as connecting to consistent power source not always desirable or possible. For others they have to constantly on. Often many of these systems are headless (in the embedded space it's almost always Halloween).  For memory resources ,Java ME Embedded can run in environment as low as 130KB RAM/350KB ROM for a minimal, customized configuration up to 700KB RAM/1500KB ROM for the full, standard configuration. Java SE Embedded is designed for environments starting at 32MB RAM/39MB  ROM. Key functionality of embedded devices such as auto-start and recovery, flexible networking are fully supported. And while Java SE Embedded has been optimized for mid-range to high-end embedded systems, Java ME Embedded is a Java runtime stack optimized for small embedded systems. It provides a robust and flexible application platform with dedicated embedded functionality for always-on, headless (no graphics/UI), and connected devices. 8. Leverage huge Java developer ecosystem (expertise, existing code) There are over 9 million developers in world that work on Java, and while not all of them work on embedded systems, their wealth of expertise in developing applications is immense. In short, getting a java developer to work on a embedded system is pretty easy, you probably have a java developer living in your subdivsion.  Then of course there is the wealth of existing code. The Java Embedded Community on Java.net is central gathering place for embedded Java developers. Conferences like Embedded Java @ JavaOne and the a variety of hardware vendor conferences like Freescale Technlogy Forums offer an excellent opportunity for those interested in embedded systems. 9. Easily create end-to-end solutions integrated with Java back-end services In the "Internet of Things" things aren't on an island doing an single task. For instance and embedded drink dispenser doesn't just dispense a beverage, but could collect money from a credit card and also send information about current sales. Similarly, an embedded house power monitoring system doesn't just manage the power usage in a house, but can also send that data back to the power company. In both cases it isn't about the individual thing, but monitoring a collection of  things. How much power did your block, subdivsion, area of town, town, county, state, nation, world use? How many Dr Peppers were purchased from thing1, thing2, thingN? The point is that all this information can be collected and transferred securely  (and believe me that is key issue that Java fully supports) to back end services for further analysis. And what better back in service exists than a Java back in service. It's interesting to note that on larger embedded platforms that support the Java Embedded Suite some of the analysis might be done on the embedded device itself as JES has a glassfish server and Java Database as part of the installation. The result is an end to end Java solution. 10. Solutions from constrained devices to server-class systems Just take a look at some of the embedded Java systems that have already been developed and you'll see a vast range of solutions. Livescribe pen, Kindle, each and every Blu-Ray player, Cisco's Advanced VOIP phone, KronosInTouch smart time clock, EnergyICT smart metering, EDF's automated meter management, Ricoh Printers, and Stanford's automated car  are just a few of the list of embedded Java implementation that continues to grow. Conclusion Now if your a Java Developer you probably look at some of the 10 reasons and say "duh", but for the embedded developers this is should be an eye opening list. And with the release of ME Embedded 3.2 and the Java Embedded Suite the embedded developers life is now a whole lot easier. For the Java developer your employment opportunities are about to increase. For both it's a great time to start developing Java for the "Internet of Things".

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