single player - Page 525

ActiveX Content in a local web page, and "the mark of the web"

- by Daniel Magliola

Hi, I'm trying to make a webpage that people will run from their hard drives, locally, and this page will show a .wmv video (which is also stored locally), using Windows Media Player When I run this, IE shows me the "ActiveX Warning" bar at the top, which is what i'm trying to work around. If I load this from a web server, it loads fine, but from the local disk, it won't. Now, apparently, MS has added the Mark of the Web thingy precisely to work around this problem, however, I've been trying for a while to make it work, and it just didn't. I still get the warning bar. Is the Mark of the Web supposed to still work? Or this is some kind of deprecated thing? Am I doing anything wrong? I'm supposedly following all instructions, it looks like: and I've tried placing it before DOCTYPE, between DOCTYPE and <HTML>, right after <HTML>, in the <HEAD> of the document, etc. Nothing seems to work. I've tried this in IE7 and IE8 Any ideas will be GREATLY appreciated. Thanks!!

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UIImagePickerController does nothing when using camera after I hit "Use" button

- by wgpubs

Code below. When I hit the "Use" button after taking a picture ... the application becomes totally unresponsive. Any ideas what I'm doing wrong? The "addPlayer:" method is called when a button is pressed on the UIViewController's view. Thanks - (IBAction) addPlayers: (id)sender{ // Show ImagePicker UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; // If camera is available use it and display custom overlay view so that user can add as many pics // as they want without having to go back to parent view if([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) { imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; } else { imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; } [self presentModalViewController:imagePicker animated:YES]; [imagePicker release]; } - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { // Grab original image UIImage *photo = [info objectForKey:UIImagePickerControllerOriginalImage]; // Resize photo first to reduce memory consumption [self.photos addObject:[photo scaleToSize:CGSizeMake(200.0f, 300.0f)]]; // Enable *PLAY* button if photos > 1 if([self.photos count] > 1) btnStartGame.enabled = YES; // Update player count label lblPlayerCount.text = [NSString stringWithFormat:@"%d", [self.photos count]]; // Dismiss picker if not using camera picker dismissModalViewControllerAnimated:YES]; }

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Using events in an external swf to load a new external swf

- by wdense51

Hi I'm trying to get an external swf to load when the flv content of another external swf finishes playing. I've only been using actiosncript 3 for about a week and I've got to this point from tutorials, so my knowledge is limited. This is what I've got so far: Code for External swf (with flv content): import fl.video.FLVPlayback; import fl.video.VideoEvent; motionClip.playPauseButton = player; motionClip.seekBar = seeker; motionClip.addEventListener(VideoEvent.COMPLETE, goNext); function goNext(e:VideoEvent):void { nextFrame(); } And this is the code for the main file: var Xpos:Number=110; var Ypos:Number=110; var swf_MC:MovieClip = new MovieClip(); var loader:Loader = new Loader(); var defaultSWF:URLRequest = new URLRequest("arch_reel.swf"); addChild (swf_MC); swf_MC.x=Xpos swf_MC.y=Ypos loader.load(defaultSWF); swf_MC.addChild(loader); //Btns Universal Function function btnClick(event:MouseEvent):void{ SoundMixer.stopAll(); swf_MC.removeChild(loader); var newSWFRequest:URLRequest = new URLRequest("motion.swf"); loader.load(newSWFRequest); swf_MC.addChild(loader); } function returnSWF(event:Event):void{ swf_MC.removeChild(loader); loader.load(defaultSWF); swf_MC.addChild(loader); } //Btn Listeners motion.addEventListener(MouseEvent.CLICK,btnClick); swf_MC.addEventListener(swf_MC.motionClip.Event.COMPLETE,swf_MC.motionClip.eventClip, returnSWF); I'm starting to get an understanding of how all of this works, but it's all to new to me at the moment, so I'm sure I've approached it from the wrong angle. Any help would be fantastic, as I've been trying at this for a few days now. Thanks

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iOS 5.0 AVAudioPlayer Error loading audio clip: The operation couldn’t be completed. (OSStatus error -50.)

- by Jason Catudal

So I'm trying to test out the audio player on the iPhone, and I went off Troy Brant's iOS book. I have the Core Audio, Core Foundation, AudioToolbox, and AVFoundation frameworks added to my project. The error message I get is in the subject field. I read like 20 pages of Google search results before resorting to asking here! /sigh. Thanks if you can help. Here's my code, pretty much verbatim out of his book: NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"Yonah" ofType:@"caf"]; NSLog(@"%@", soundFilePath); NSURL *fileURL = [NSURL URLWithString:soundFilePath]; NSError *error; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:&error]; if (!error) { audioPlayer.delegate = self; //audioPlayer.numberOfLoops = -1; [audioPlayer play]; } else { NSLog(@"Error loading audio clip: %@", [error localizedDescription]); } EDIT: Holy Shinto. I figured out what it was. I changed NSURL *fileURL = [NSURL URLWithString:soundFilePath]; to NSURL *fileURL = [NSURL fileURLWithPath:soundFilePath]; to the latter and I was getting a weird error, weirder than the one in the subject BUT I googled that and I changed my OS input device from my webcam to my internal microphone and guess what, it worked under the fileURLWithPath method. I'll be. Damned.

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Parsing HTML using HtmlParser

- by Blankman

My html has 20 or so rows of the following HTML pattern. So the below is considered a single instance of the pattern. Each instance of this pattern represents a product. Again the below is a single instance, it spans multiple rows in the HTML table. <table> ..  <tr> <td rowspan="5" class="product" valign="top"><nobr> ????????????</td> </tr> <tr> <td class="title" ??????????>?????????</td> <td class="title" ??????????>?????????</td> <td class="title" ??????????>?????????</td> <td class="title" ??????????>?????????</td> <td class="title" ??????????>?????????</td> <td class="title" ??????????>?????????</td> </tr> <tr> <td class="data" ?????? </td> <td class="data" ?????? </td> <td class="data" ?????? </td> <td class="data" ?????? </td> <td class="data" ?????? </td> <td class="data" ?????? </td> </tr> </tr> <tr> <td colspan="5" ????????</td> </tr> <tr> <td colspan="6" width="100%"> <hr></td> </tr>   .. <table> I am trying to use HtmlParser for this. Parser rowParser = new Parser(); rowParser.setInputHtml(page.getHtml()); // page object represents a html page rowParser.setEncoding("UTF-8"); NodeFilter productRowFilter = new AndFilter( new TagNameFilter("tr"), new HasChildFilter( new AndFilter( new TagNameFilter("td"), new HasAttributeFilter("class", "product"))) The above filter doesn't work, just showing you what I have so far. I need to somehow combine these filters, and use the last td to mark the end of the pattern i.e. the td with the colspan=6 and width=100% with child element hr. I have been struggling with this, and have resorted to Regex'ing but was told numerous times to NOT use regex for html parsing, so here I am! Your help is much appreciated!

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Building Cross Platform app - recommendation

- by Ben

Hi, I need to build a fairly simple app but it needs to work on both PC and Mac. It also needs to be redistributable on a disc or usb drive as a standalone desktop app. Initially I thought AIR would be perfect for this (it ticks all the API requirements), but the difficulty is making it distributable, as the app would require the AIR runtime to be installed to run. I came across Shu Player as an option as it seems to be able to package the AIR runtime with the app and do a (silent?) install. However this seems to break the T&C from Adobe (as outlined here) so I'm not sure about the legality. Another option could be Zinc but I haven't tested it so I'm not sure how well it'll fit the bill. What would you recommend or suggest I check out? Any suggestion much appreciated EDIT: There's a few more discussions on mono usage (though no real conclusion): Here and Here EDIT2: Titanium could also fit the bill maybe, will check it out. Any more comments from anyone? Ben

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FMS NetConnection.Connect.Close happening when starts and even in the middle of video in Flash with

- by Sunil Kumar

Hi I have developed a Flash Video player in Flash CS3 with Action Script 2.0 to play video from Adobe Flash Media Server 3.5. To play video from FMS 3.5, first I have to verify my swf file on FMS 3.5 server console so that it can be ensure that RTMP video URL only be play in verified SWF file. Right now I am facing problem of "NetConnection.Connect.Close" when I try to connect my NetConnection Object to FMS 3.5 to stream video from that server. So now I am getting this message "NetConnection.Connect.Close" from FMS 3.5. When this is happening in my office area at the same time when I am checking the the same video url from out side the office (With help of my friends who is in another office) area it is working fine. My friends naver faced even a single issue with NetConnection.Connect.Close. But in my office when I got message NetConnection.Connect.Close, I can play another streaming video very well like mtv.com jaman.com rajshri.com etc. Some time FMS works fine and video starts playing but in the middle of the video same thing happen "NetConnection.Connect.Close" There is no issue of Bandwidth in my office. I do't know why this is happening. Please see the message when I am getting "NetConnection.Connect.Close" message. NetConn == data: NetConn == objectEncoding: 0 NetConn == description: Connection succeeded. NetConn == code: NetConnection.Connect.Success NetConn == level: status NetConn == level: status NetConn == code: NetConnection.Connect.Closed Please help Thanks & regards Sunil Kumar

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Viewing a large-resolution VNC server through a small-resolution viewer in Ubuntu

- by Madiyaan Damha

I have two Ubuntu computers, one with a large screen resolution (1920x1600) that is running default ubuntu vnc server. I have another computer that has a resolution of about 1200x1024 that I use to vnc into the server (I use the default ubuntu vnc viewer). Now everything works fine except there are annoying scrollbars in the viewer because the server's desktop resolution is so much higher than the viewer's. Is there a way to: 1) Scale the server's desktop down to the viewer's resolution. I know there will be a loss of image quality, but I am willing to try it out. This should be something like how windows media player or vlc scales down the window (and does some interpolation of pixels). 2) Automatically shrink the resolution of the server to the client's when I connect and scale the resolution back when I disconnect. This seems like a less attractive solution. 3) Any other solution that gurus out there use? I am sure someone has experienced this before (annoying scroll bars) so there must be a solution out there. Thanks,

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Autocomplete jQuery on User Controller within Repeater .NET

- by TheDPQ

I have a Multiview search feature on a Web User Controller that is called within a Repeater, OHMY!! I have some training sessions being listed out on a page, each calling an employeeSearch Web User Controller so people can search for employees to add to the training session. I have the Employee Names and Employee IDs listed out in JS on the page and using the jQuery autocomplete i have them search for the employee and populate a hidden field in the User controller. Once the process is done they have the option of adding yet another employee. So i had Autocompelte 'work' in all the employee search boxes, but one i do the initial search (postback) autocomplete won't work again. Then i updated $().ready(function() to pageLoad() so it works correctly on multiple searches but only in the LAST item of the repeater (jQuery is loaded on the User Controller) FYI: I have the JS string set as EMPLOYEENAME|ID and jQuery displays the Employee Name and if they select it throws the ID in a ASP:HIDDEN FIELD <script type="text/javascript"> format_item = function(item, position, length) { var str = item.toString().split("|", 2); return str[0]; } function pageLoad() { $("#<%=tb_EmployeeName.ClientID %>").autocomplete(EmployeeList, { minChars: 0, width: 500, matchContains: true, autoFill: false, scrollHeight: 300, scroll: true, formatItem: format_item, formatMatch: format_item, formatResult: format_item }); $("#<%=tb_EmployeeName.ClientID %>").result(function(event, data, formatted) { var str = data.toString().split("|", 2); $("#<%=hf_EmployeeID.ClientID %>").val(str[1]); }); }; </script> I can already guess that by repeating pageLoad within the User Controll i override the previous pageLoad. THE QUESTION: Is there a way around this, a way to have all the jQuery appear in a single pageLoad or to somehow have a single jquery call to handle all my search boxes? I can't move the jQuery into the page calling all the controllers because i have no way of referencing the specific *tb_EmployeeName* textbox AND *hf_EmployeeID* hidden field. Thank you so much for any help or insight you can give me into this problem. This is the Multiview that on the User Controller <asp:MultiView ID="mv_EmployeeArea" runat="server" ActiveViewIndex="0"> <asp:View ID="vw_Search" runat="server"> <asp:Panel ID="eSearch" runat="server"> <b>Signup Employee Search</b> (<i>Last Name, First Name</i>)<br /> <asp:TextBox ID="tb_EmployeeName" class="EmployeeSearch" runat="server"></asp:TextBox> <asp:HiddenField ID="hf_EmployeeID" runat="server" /> <asp:Button ID="btn_Search" runat="server" Text="Search" /> </asp:Panel> </asp:View> <asp:View ID="vw_Confirm" runat="server"> <b>Signup Confirmation</b> <asp:FormView ID="fv_EmployeeInfo" runat="server"> <ItemTemplate> <%#(Eval("LastName"))%>, <%#(Eval("FirstName"))%><br /> </ItemTemplate> </asp:FormView> <asp:Button ID="btn_Confirm" runat="server" Text="Signup this employee" />   <asp:Button ID="btn_Reset3" runat="server" Text="Reset" /> </asp:View> <asp:View ID="vw_ThankYou" runat="server"> <b>Thank You</b><br /> The employee has been signed up and an email confirmation has been sent out.<br /><br /> <asp:Button ID="btn_Reset" runat="server" Text="Reset" /> </asp:View> </asp:MultiView> UPDATE: I never did find an answer but i had to do a demo so i hacked together something that 'works', but feels sort of cheesy. I am still very much needed of a better question or better understanding.

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Flash/Flex: "Warning: filter will not render" problem

- by davidemm

In my flex application, I have a custom TitleWindow that pops up in modal fashion. When I resize the browser window, I get this warning: Warning: Filter will not render. The DisplayObject’s filtered dimensions (1286, 107374879) are too large to be drawn. Clearly, I have nothing set with a height of 107374879. After that, any time I mouse over anything in the Flash Player (v. 10), the CPU churns at 100%. When I close the TitleWindow, the problem subsides. Sadly, the warning doesn't seem to indicate which DisplayObject object is too large to draw. I've tried attaching explicit height/widths to the TitleWindow and the components within, but still no luck. [Edit] The plot thickens: I found that the problem only occures when I set the PopUpManager's createPopUp modal parameter to "true." I don't see the behavior when modal is set to "false." It's failing while applying the graying filter to other components that comes from being modal. Any ideas how I can track down the one object that has not been initialized but is being filter during the modal phase? Thanks for reading.

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DirectX Desktop

- by Jonathan

Hi. I'd like to make an animated desktop background for Windows 7 using DirectX. I'm using C#, SlimDX and a couple of P/Invoke imports of Windows API functions. I'm not brilliant with native Windows programming, but I've had a poke around online and I believe what I need to do is either: 1) Find the handle of the window containing the dekstop wallpaper, hook it up to a DirectX device and draw into it. 2) Make a new output window, and insert it above the desktop wallpaper but below the desktop icons. I've tried both these, but neither seems to work. If I navigate the Window heirarchy starting from the handle returned by GetDesktopWindow(), I can go Desktop - WorkerW - SHELLDLL_DefView - SysListView32. If I hook up a DirectX device to this handle, I can draw over the entire desktop, but it also covers the icons. If I create a Windows form, set its parent to SHELLDLL_DefView using SetParent() and then use SetWindowPos to play with its Z-order I can only seem to get it to go either behind the desktop wallpaper or in front of the desktop + icons. It looks as though the desktop wallpaper is background to the folder view containing the icons, and therefore what I am trying to do cannot work. The only solution then would be to not use the desktop for icons, or to find some alternative, e.g. overwriting the desktop then overlaying a transparent window containing a view of the contents of some folder. Does anyone have any idea of what I should be doing, or even whether what I want to do is possible? It seems you can draw to the desktop background using the GDI (as I believe the wxSnow program does), and I've seen something similar to what I want done by VLC Media Player under Windows XP with its DirectX wallpaper mode (interestingly, I can't seem to get this option enabled on my system). Thanks!

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NSURL Connection will/won't load data

- by jkap

So here's my issue: I followed the NSURLConnection tutorial in the iPhone Developer Documentation almost to the T, and it only kinda works. Here's where it all goes wrong: The object seems to be created correctly and delegates to connectionDidFinishLoading, but with any URL I try to load the response data always ends up only being 0 bytes. I am running in the simulator if that makes any difference. Here's my relevant code: - (void)viewDidLoad { [super viewDidLoad]; self.title = @"WVFS Player"; //create a request NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://wvfs.josh-kaplan.com/nowPlaying.php"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create a connection NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if(theConnection) { // create the datum responseData=[[NSMutableData data] retain]; } else { // code this later } } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [responseData setLength:0]; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // make it work NSLog(@"Succeeded! Received %d bytes of data:",[responseData length]); // release it [connection release]; [responseData release]; } And here's my log output: [Session started at 2010-03-14 09:01:09 -0400.] 2010-03-14 09:01:14.784 WVFS[19571:207] Succeeded! Received 0 bytes of data: Any ideas? Thanks, Josh

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js popup window to play .flv flash video using jwplayer.swf

- by Mike Trader

js popup window to play .flv using jwplayer.swf I would like to adjust this code so that it does not crash the browser when expanded to full screen and the popup closes when it looses focus <html> <head> <title>Popup Example</title> <center> <div class="yt_container"> <div id="yt_the_video" class="yt_video_full"> <script type="text/javascript" src="swfobject.js"></script> <script type="text/javascript"> var s1 = new SWFObject("player.swf","ply","640","500","9","#FFFFFF"); s1.addParam("allowfullscreen","true"); s1.addParam("allownetworking","all"); s1.addParam("allowscriptaccess","always"); s1.addParam("flashvars",'&file=GJClip.flv&autostart=true'); </script> </head> <body 

bgcolor="#CCCFFF"> <img alt="GJ" src="GJPlay.jpg"
width="80" height="60" onClick="s1.write('yt_the_video');"

</body> </html> I have to have many small thumbnails on a page and each one needs to open up to a full size (640x480) video with controls when clicked. Having looked at Shdowbox (dims web page behind it, not allowed to do that) and lightbox which I cannot get to work at all, I am down to a home gown solution, which I prefer anyway.

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Android Scoreloop, OpenFeint etc al

- by theblitz

I am looking to use one of the social networks in my Android program. Most important for me is the ability to build a continuous leadership board in which players move up and down depending their wins/loses to others. The idea is for players to challenge others head-to-head. The winner gains points and the loser loses points. Equally important, I want this feature to include the possibility to "charge" the player game coins. Scoreloop includes the possibility of challenges but they are there in order to win coins off other players. In other words, they are the means to the end. In my case I need it to be the other way around. The "ends" is to be higher in the leadership board and the "means" are to play others with coins. Scoreloop do have a continuos leadership board but it is not accessible from the program. I tried looking at OpenFeint but their site is a real mess. It is impossible to understand from there exactly what is and isn't available. I signed up and tried to add my program. I ended up adding it four times and cannot delete it!

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Interactive Data Language, IDL: Does anybody care?

- by Alex

Anyone use a language called Interactive Data Language, IDL? It is popular with scientists. I think it is a poor language because it is proprietary (every terminal running it has to have an expensive license purchased) and it has minimal support (try searching for IDL, the language, right now on stack) . I am trying to convince my colleagues to stop using it and learn C/C++/Python/Fortran/Java/Ruby. Does anybody know about or even care about IDL enough to have opinions on it? What do you think of it? Should I tell my colleagues to stop wasting their time on it now? How can I convince them? Edit: People are getting the impression that I don't know or use IDL. Also, I said IDL has minimal support which is true in one sense, so I must clarify that the scientific libraries are indeed large. I use IDL all the time, but this is exactly the problem: I am only using IDL because colleagues use it. There is a file format IDL uses, the .sav, which can only be opened in IDL. So I must use IDL to work with this data and transfer the data back to colleagues, but I know I would be more efficient in another language. This is like someone sending you a microsoft word file in an email attachment and if you don't understand how wrong that is then you probably write too many words not enough code and you bought microsoft word. Edit: As an alternative to IDL Python is popular. Here is a list of The Pros of IDL (and the cons) from AstroBetter: Pros of IDL Mature many numerical and astronomical libraries available Wide astronomical user base Numerical aspect well integrated with language itself Many local users with deep experience Faster for small arrays Easier installation Good, unified documentation Standard GUI run/debug tool (IDLDE) Single widget system (no angst about which to choose or learn) SAVE/RESTORE capability Use of keyword arguments as flags more convenient Cons of IDL Narrow applicability, not well suited to general programming Slower for large arrays Array functionality less powerful Table support poor Limited ability to extend using C or Fortran, such extensions hard to distribute and support Expensive, sometimes problem collaborating with others that don’t have or can’t afford licenses. Closed source (only RSI can fix bugs) Very awkward to integrate with IRAF tasks Memory management more awkward Single widget system (useless if working within another framework) Plotting: Awkward support for symbols and math text Many font systems, portability issues (v5.1 alleviates somewhat) not as flexible or as extensible plot windows not intrinsically interactive (e.g., pan & zoom) Pros of Python Very general and powerful programming language, yet easy to learn. Strong, but optional, Object Oriented programming support Very large user and developer community, very extensive and broad library base Very extensible with C, C++, or Fortran, portable distribution mechanisms available Free; non-restrictive license; Open Source Becoming the standard scripting language for astronomy Easy to use with IRAF tasks Basis of STScI application efforts More general array capabilities Faster for large arrays, better support for memory mapping Many books and on-line documentation resources available (for the language and its libraries) Better support for table structures Plotting framework (matplotlib) more extensible and general Better font support and portability (only one way to do it too) Usable within many windowing frameworks (GTK, Tk, WX, Qt…) Standard plotting functionality independent of framework used plots are embeddable within other GUIs more powerful image handling (multiple simultaneous LUTS, optional resampling/rescaling, alpha blending, etc) Support for many widget systems Strong local influence over capabilities being developed for Python Cons of Python More items to install separately Not as well accepted in astronomical community (but support clearly growing) Scientific libraries not as mature: Documentation not as complete, not as unified Not as deep in astronomical libraries and utilities Not all IDL numerical library functions have corresponding functionality in Python Some numeric constructs not quite as consistent with language (or slightly less convenient than IDL) Array indexing convention “backwards” Small array performance slower No standard GUI run/debug tool Support for many widget systems (angst regarding which to choose) Current lack of function equivalent to SAVE/RESTORE in IDL matplotlib does not yet have equivalents for all IDL 2-D plotting capability (e.g., surface plots) Use of keyword arguments used as flags less convenient Plotting: comparatively immature, still much development going on missing some plot type (e.g., surface) 3-d capability requires VTK (though matplotlib has some basic 3-d capability)

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FileReference.load() does not as excepted

- by Yang Bo

I used Flash player 10, and Flex SDK 3.4. The code as followings: // Following comes callbacks function imageLoadOpenCallback(evt:Event):void { trace("in--open"); } function imageLoadCompleteCallback(evt:Event):void { trace("in--load"); var fr:FileReference = evt.target as FileReference; trace(fr.data); } function imageLoadErrorCallback(evt:IOErrorEvent):void { trace("in--ioerror"); } function imageSelectCancelCallback(evt:Event):void { trace("in cancel"); } function imageSelectCallback(evt:Event):void { trace("in -- select"); for (var i:int=0; i<frl.fileList.length; i++) { frl.fileList[i].addEventListener(Event.OPEN, imageLoadOpenCallback); frl.fileList[i].addEventListener(Event.COMPLETE, imageLoadCompleteCallback); frl.fileList[i].addEventListener(IOErrorEvent.IO_ERROR, imageLoadErrorCallback); frl.fileList[i].load(); trace(frl.fileList[i]); trace(frl.fileList[i].creationDate); trace(frl.fileList[i].creator); trace(frl.fileList[i].data); trace(frl.fileList[i].name); } } // Following comes UI handlers function onAddPictures():void { var imageFilter:FileFilter = new FileFilter("Images", "*.jpg;*.png"); frl.addEventListener(Event.SELECT, imageSelectCallback); frl.addEventListener(Event.CANCEL, imageSelectCancelCallback); frl.browse([imageFilter]); } Only the imageSelectCancelCallback handler get called when I select some files in the dialog. But no load/open/io_error handler get called at all. I have Google some code example, in which it used FileReference instead of FileReferenceList. I don't know the reason, could you please help me?

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Linking LLVM JIT Code to Static LLVM Libraries?

- by inflector

I'm in the process of implementing a cross-platform (Mac OS X, Windows, and Linux) application which will do lots of CPU intensive analysis of financial data. The bulk of the analysis engine will be written in C++ for speed reasons, with a user-accessible scripting engine interfacing with the C++ testing engine. I want to write several scripting front-ends over time to emulate other popular software with existing large user bases. The first front will be a VisualBasic-like scripting language. I'm thinking that LLVM would be perfect for my needs. Performance is very important because of the sheer amount of data; it can take hours or days to run a single run of tests to get an answer. I believe that using LLVM will also allow me to use a single back-end solution while I implement different front-ends for different flavors of the scripting language over time. The testing engine itself will be separated from the interface and testing will even take place in a separate process with progress and results being reported to the testing management interface. Tests will consist of scripting code integrated with the testing engine code. In a previous implementation of a similar commercial testing system I wrote, I built a fast interpreter which easily interfaced with the testing library because it was written in C++ and linked directly to the testing engine library. Callbacks from scripting code to testing library objects involved translating between the formats with significant overhead. I'm imagining that with LLVM, I could implement the callbacks into C++ directly so that I could make the scripting code work almost as if it had been written in C++. Likewise, if all the code was compiled to LLVM byte-code format, it seems like the LLVM optimizers could optimize across the boundaries between the scripting language and the testing engine code that was written in C++. I don't want to have to compile the testing engine every time. Ideally, I'd like to JIT compile only the scripting code. For small tests, I'd skip some optimization passes, while for large tests, I'd perform full optimizations during the link. So is this possible? Can I precompile the testing engine to a .o object file or .a library file and then link in the scripting code using the JIT? Finally, ideally, I'd like to have the scripting code implement specific methods as subclasses for a specific C++ class. So the C++ testing engine would only see C++ objects while the JIT setup code compiled scripting code that implemented some of the methods for the objects. It seems that if I used the right name mangling algorithm it would be relatively easy to set up the LLVM generation for the scripting language to look like a C++ method call which could then be linked into the testing engine. Thus the linking stage would go in two directions, calls from the scripting language into the testing engine objects to retrieve pricing information and test state information and calls from the testing engine of methods of some particular C++ objects where the code was supplied not from C++ but from the scripting language. In summary: 1) Can I link in precompiled (either .bc, .o, or .a) files as part of the JIT compilation, code-generation process? 2) Can I link in code using that the process in 1) above in such a way that I am able to create code that acts as if it was all written in C++?

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Dealing with asynchronous control structures (Fluent Interface?)

- by Christophe Herreman

The initialization code of our Flex application is doing a series of asynchronous calls to check user credentials, load external data, connecting to a JMS topic, etc. Depending on the context the application runs in, some of these calls are not executed or executed with different parameters. Since all of these calls happen asynchronously, the code controlling them is hard to read, understand, maintain and test. For each call, we need to have some callback mechanism in which we decide what call to execute next. I was wondering if anyone had experimented with wrapping these calls in executable units and having a Fluent Interface (FI) that would connect and control them. From the top of my head, the code might look something like: var asyncChain:AsyncChain = execute(LoadSystemSettings) .execute(LoadAppContext) .if(IsAutologin) .execute(AutoLogin) .else() .execute(ShowLoginScreen) .etc; asyncChain.execute(); The AsyncChain would be an execution tree, build with the FI (and we could of course also build one without a FI). This might be an interesting idea for environments that run in a single threaded model like the Flash Player, Silverlight, JavaFX?, ... Before I dive into the code to try things out, I was hoping to get some feedback.

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Canvas rotate from bottom center image angle?

- by Tom

How do you rotate an image with the canvas html5 element from the bottom center angle? See http://uptowar.com/test.php for my current code and image: <html> <head> <title>test</title> <script type="text/javascript"> function startup() { var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var img = new Image(); img.src = 'player.gif'; img.onload = function() { ctx.translate(185, 185); ctx.rotate(90 * Math.PI / 180); ctx.drawImage(img, 0, 0, 64, 120); } } </script> </head> <body onload='startup();'> <canvas id="canvas" style="position: absolute; left: 300px; top: 300px;" width="800" height="800"></canvas> </body> </html> Unfortunately this seems to rotate it from the top left angle of the image. Any idea? Edit: in the end the object (space ship) has to rotate like a clock pointer, as if it is turning right/left.

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jquery slider control issue

- by Geetha

Hi All, I am using slider control to create a progress bar for media player. Problem: the max value and slider size is not matching. The video get complete before it reaches the end of the slider. Code: <script type="text/javascript" src="js/jquery.ui.core.js"></script> <script type="text/javascript" src="js/jquery.ui.slider.js"></script> <link type="text/css" href="CSS/demos.css" rel="stylesheet" /> <link type="text/css" href="CSS/jquery-ui.css" rel="stylesheet" /> $('#slider-constraints').slider("value", 0); $('#slider-constraints').slider("constraints", [0, 0]); $("#slider-constraints").slider({ max: document.mediaPlayer.SelectionEnd, animate: true, range: $R(0, document.mediaPlayer.SelectionEnd), values:(0,document.mediaPlayer.SelectionEnd), value: val, enforceConstraints: false, slide: function(event, ui) { document.mediaPlayer.currentPosition = ui.value; $('#slider-constraints').slider("constraints", [0, ui.value]); $('#slider-constraints').slider("value", ui.value); }, start: function(event, index) { document.mediaPlayer.currentPosition = index.value; $('#slider-constraints').slider("constraints", [0, index.value]); $('#slider-constraints').slider("value", index.value); } }); } // Haldler position window.setInterval(function() { if (document.mediaPlayer.PlayState != 2 && document.mediaPlayer.PlayState == 0) { $('#slider-constraints').slider("constraints", [0, 0]); $('#slider-constraints').slider("value", 0); } else { $('#slider-constraints').slider("constraints", [0, document.mediaPlayer.currentPosition]); } }, 3000); // Progressbar position window.setInterval(function() { if (document.mediaPlayer.PlayState != 2 && document.mediaPlayer.PlayState == 0) { $('#slider-constraints').slider("constraints", [0, 0]); $('#slider-constraints').slider("value", 0); } else { $('#slider-constraints').slider("value", document.mediaPlayer.currentPosition); } }, 3000); } <div id="slider-constraints" > </div>

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Debugging Key-Value-Observing overflow.

- by Paperflyer

I wrote an audio player. Recently I started refactored some of the communication flow to make it fully MVC-compliant. Now it crashes, which in itself is not surprising. However, it crashes after a few seconds inside the Cocoa key-value-observing routines with a HUGE stack trace of recursive calls to NSKeyValueNotifyObserver. Obviously, it is recursively observing a value and thus overflowing the NSArray that holds pending notifications. According to the stack trace, the program loops from observeValueForKeyPath to setMyValue and back. Here is the according code: - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqual:@"myValue"] && object == myModel && [self myValue] != [myModel myValue]) { [self setMyValue:[myModel myValue]; } } and - (void)setMyValue:(float)value { myValue = value; [myModel setMyValue:value]; } myModel changes myValue every 0.05 seconds and if I log the calls to these two functions, they get called only every 0.05 seconds just as they should be, so this is working properly. The stack trace looks like this: -[MyDocument observeValueForKeyPath:ofObject:change:context:] NSKeyValueNotifyObserver NSKeyValueDidChange -[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] -[MyDocument setMyValue:] _NSSetFloatValueAndNotify …repeated some ~8k times until crash Do you have any idea why I could still be spamming the KVO queue?

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Need help making a check statement to make sure al the controls are not blank

- by Michael Quiles

This is for a tic tac toe game. I need help making a check statement to see if all the controls' Texts are non-blank, and if they are, you have a draw (if someone had won the previous code would have discovered that). Can you give me a good example using my code. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing; namespace MyGame { public class Result1 { static private int[,] Winners = new int[,] { // main gameplay Ex: if x is on 0,1,2 x is the winner {0,1,2}, {3,4,5}, {6,7,8}, {0,3,6}, {1,4,7}, {2,5,8}, {0,4,8}, {2,4,6}, }; static public bool CheckWinner(Button[] myControls) { //bolean statement to check for the winner bool gameOver = false; for (int i = 0; i < 8; i++) { int a = Winners[i, 0]; int b = Winners[i, 1]; int c = Winners[i, 2]; Button b1 = myControls[a], b2 = myControls[b], b3 = myControls[c]; if (b1.Text == "" || b2.Text == "" || b3.Text == "") continue; if (b1.Text == b2.Text && b2.Text == b3.Text) { b1.BackColor = b2.BackColor = b3.BackColor = Color.LightCoral; b1.Font = b2.Font = b3.Font = new System.Drawing.Font("Microsoft Sans Serif", 32F, System.Drawing.FontStyle.Italic & System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); gameOver = true; xWinnerForm xWinnerForm = new xWinnerForm(); xWinnerForm.ShowDialog(); //only works with show not showDialog method gets overloaded (b1.Text + " is the Winner"); to get around this I added and image showing the last player } } return gameOver; } } }

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Is the Cloud ready for an Enterprise Java web application? Seeking a JEE hosting advice.

- by Jakub Holý

Greetings to all the smart people around here! I'd like to ask whether it is feasible or a good idea at all to deploy a Java enterprise web application to a Cloud such as Amazon EC2. More exactly, I'm looking for infrastructure options for an application that shall handle few hundred users with long but neither CPU nor memory intensive sessions. I'm considering dedicated servers, virtual private servers (VPSs) and EC2. I've noticed that there is a project called JBoss Cloud so people are working on enabling such a deployment, on the other hand it doesn't seem to be mature yet and I'm not sure that the cloud is ready for this kind of applications, which differs from the typical cloud-based applications like Twitter. Would you recommend to deploy it to the cloud? What are the pros and cons? The application is a Java EE 5 web application whose main function is to enable users to compose their own customized Product by combining the available Parts. It uses stateless and stateful session beans and JPA for persistence of entities to a RDBMS and fetches information about Parts from the company's inventory system via a web service. Aside of external users it's used also by few internal ones, who are authenticated against the company's LDAP. The application should handle around 300-400 concurrent users building their product and should be reasonably scalable and available though these qualities are only of a medium importance at this stage. I've proposed an architecture consisting of a firewall (FW) and load balancer supporting sticky sessions and https (in the Cloud this would be replaced with EC2's Elastic Load Balancing service and FW on the app. servers, in a physical architecture the load-balancer would be a HW), then two physical clustered application servers combined with web servers (so that if one fails, a user doesn't loose his/her long built product) and finally a database server. The DB server would need a slave backup instance that can replace the master instance if it fails. This should provide reasonable availability and fault tolerance and provide good scalability as long as a single RDBMS can keep with the load, which should be OK for quite a while because most of the operations are done in the memory using a stateful bean and only occasionally stored or retrieved from the DB and the amount of data is low too. A problematic part could be the dependency on the remote inventory system webservice but with good caching of its outputs in the application it should be OK too. Unfortunately I've only vague idea of the system resources (memory size, number and speed of CPUs/cores) that such an "average Java EE application" for few hundred users needs. My rough and mostly unfounded estimate based on actual Amazon offerings is that 1.7GB and a single, 2-core "modern CPU" with speed around 2.5GHz (the High-CPU Medium Instance) should be sufficient for any of the two application servers (since we can handle higher load by provisioning more of them). Alternatively I would consider using the Large instance (64b, 7.5GB RAM, 2 cores at 1GHz) So my question is whether such a deployment to the cloud is technically and financially feasible or whether dedicated/VPS servers would be a better option and whether there are some real-world experiences with something similar. Thank you very much! /Jakub Holy PS: I've found the JBoss EAP in a Cloud Case Study that shows that it is possible to deploy a real-world Java EE application to the EC2 cloud but unfortunately there're no details regarding topology, instance types, or anything :-(

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Trigger for ComboBox in Silverlight

- by Budda

Is there any possibility to display selected item of the ComboBox (after popup closing) in a way that is different from its displaying in DropDown List (There are players number and name in the dropdown list, but after list closing I want to see only its number). How can I change a background for the player with some Flag? As far as I know, all of that can be done with triggers, but are they supported in Silverlight 4, VS2010, Silverlight Toolkit 4? In my case the following code <ComboBox ItemsSource="{Binding PlayersAll}" SelectedItem="{Binding Path=SelectedPlayer, Mode=TwoWay}" > <ComboBox.ItemTemplate> <DataTemplate> <ToolkitControls:WrapPanel Orientation="Horizontal"> <TextBlock Text="{Binding TeamNumber}"/> <TextBlock Text=" - "/> <TextBlock Text="{Binding ShortName}"/> </ToolkitControls:WrapPanel> <DataTemplate.Triggers> <Trigger Property="HasError" Value="True"> <Setter Property="Background" TargetName="FlagSet" Value="Red"/> </Trigger> </DataTemplate.Triggers> </DataTemplate> </ComboBox.ItemTemplate> </ComboBox> gives an error: The property 'Triggers' does not exist on the type 'DataTemplate' in the XML namespace 'http://schemas.microsoft.com/winfx/2006/xaml/presentation' what is wrong here? Here are my namespaces: xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation" xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" xmlns:ToolkitControls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"

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Things one needs to know while writing a game engine

- by Joe Barr

I have been dabbling in game development as a hobby for a while now, and I cannot seam to quite get my games to sparkle at least a bit with some graphics. I have decided to write a simple test game engine that only focuses on the representation of graphics - shapes, textures and surfaces. While I have a few very simple game engines designed for my own games under my belt, I want to create a game engine that I can use to display and play with graphics. I'm going to do this in C++. Since this is my first time with a major engine, the engine in not going to focus on 3D graphics, it's going to be a mixture of isometric and 2D graphics. My previous engines have incorporated (been able to draw) or focused on simple flat (almost 2D) non impressive graphic designs and representations of: the player NPCs objects walls and surfaces textures Also, I had some basic AI and sometimes even sound. They also saved and loaded games. They didn't have a map editor or a level editor. Is this going to be a problem in the future? At this time I have to point out that some of my games didn't get finished because I was to lazy to write the few last levels. My question at this point would be: What are some things one should know if one wants write (develope) a better graphical game engine with all it's functions.

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