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Articles indexed in April 2010

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  • How can I load an MP3 or similar music file for display and anaysis in wxWdigets?

    - by Jon Cage
    I'm developing a GUI in wxPython which allows a user to generate sequences of colours for some toys I'm building. Part of the program needs to load an MP3 (and potentially other formats further down the line) and display it to the user. That shuold be sufficient to get started but later I'd like to add features like identifying beats and some crude frequency analysis. Is there any simple way of loading / understanding an MP3's contents to display a plot of it's amplitudes to the screen using wxWidgets? I later intend to port to C++/wxWidgets for speed and to avoid having to distribute wxPython.

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  • Loading c libraries from php

    - by Thomas Ahle
    Hi, in a recent project I've come really need the lib tre matching library. However the project is in php, and there are no php bindings for the library. I've tried to google how to create an interface for c libs, but all I found was the dl function which seams to load only php extensions. What am I missing?

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  • Why element creation requires the document object in DOM?

    - by maayank
    As noted by others, in Java, with the default W3C DOM libraries, one is required to use the Document object a factory to elements, i.e.: import org.w3c.dom.Document; import org.w3c.dom.Element; Document d; Element e; e = d.createElement("tag"); Why is that necessary? Why conceptually a method can't create an XML element without knowing all of the target document? Why I can't just instantiate using 'new' or something to that effect?

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  • Detect browser focus/out-of-focus via Google Chrome Extension

    - by Paul
    Is there a way to find out if Google chrome is in focus or out of focus? I'm creating an app which needs to know if the user is currently using the browser or not. By tying the detection through the content script in a Google extension, I've tried using blur and focus but the problem is that clicking on the address bar also fires a blur event. Same goes for detecting mouse movement, where moving the mouse outside of the viewing area will not be detected. I've also tried looking at onFocusChanged but it seems it only detects changes in chromes' windows not apps outside of Chrome. Anyone have other ideas for this? Also, would this be any easier if I created an add-on for firefox instead? Thanks!

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  • Fastest way to compress a database or .bak file and transfer it

    - by Nai
    As per the question title. I wonder if there are special programmes or commands that makes zipping up a .bak file and transferring it super quick. I read abour xp_cmdshell here but I'm not sure about the speed. My .bak file is about 12 gigs at the moment. Related to this is the possibility of using Red Gate's SQL Data Compare to just transfer the differential data across the network pipeline but I have never used SQL Data Compare before and I'm not sure how it goes about doing INSERTS on tables with Primary Keys and such. Also, not sure about the speed. Does anyone have any experience with this programme or similar programmes? Cheers!

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  • jQuery galleria plugin with dynamically loaded images

    - by panas
    I'm using the Galleria plugin with jQuery to create my image gallery. I'm trying to get load images dynamically from the user's selection into the DOM and have the gallery auto-update to display those new images but it's not working. Firebug shows the images are successfully loading into the DOM but Galleria displays no thumbnails. I need a way to reload Galleria to display the new images. /* ---- Gallery Code ---- */ if ($(this).find('div').attr('title') == 'photogallery' && $('.galleria_container').length == 0) { $('.gallery').galleria( { history : false, clickNext : true, onImage : function(image,caption,thumb) { if(! ($.browser.mozilla && navigator.appVersion.indexOf("Win")!=-1) ) { image.css('display','none').fadeIn(1000); } var _li = thumb.parents('li'); caption.css('display','none').fadeIn(1000); _li.siblings().children('img.selected').fadeTo(500,0.3); thumb.fadeTo('fast',1).addClass('selected'); image.attr('title','Next image >>'); }, onThumb : function(thumb) { var _li = thumb.parents('li'); var _fadeTo = _li.is('.active') ? '1' : '0.3'; thumb.css({display:'none',opacity:_fadeTo}).fadeIn(1500); thumb.hover ( function() { thumb.fadeTo('fast',1); }, function() { _li.not('.active').children('img').fadeTo('fast',0.3); } // don't fade out if the parent is active ) } }); } /* ---- Gallery Selector ---- */ $(document).ready(function() { var galleryImages = new Object(); <?php echo $myGal; ?> function setImages(type) { var image = ''; for (var i = 0; i < galleryImages[type].length; i++) { image += '<li><img src="' + galleryImages[type][i] + '"></li>'; } $('ul.gallery').html(image); } $('ul.menu-horiz li ul li').click(function() { setImages($(this).attr('rel')); }); }); The PHP code you see just creates an array of images. So to summarise my question: How can I reload Galleria once the new images have been loaded into the DOM?

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  • gcc - using -werror and -std= -pedantic considered good practice?

    - by Helper Method
    I'm just digging into the gcc manual and some things are still unclear to me: a) When specifying a std, should I always use -pedantic in conjunction? b) When using -g, it the standard level sufficient or should I specify level 3, i.e. -g3? c) Is it good practice to use -Werror to promote all warnings to errors and -pedantic-errors to promote all pedantic warnings to errors?

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  • Vietnamese character in .NET Console Application (UTF-8)

    - by DucDigital
    Im trying to write down an UTF8 string (Vietnamese) into C# Console but no success. Im running on windows 7. I tried to use the Encoding class that convert string to char[] to byte[] and then to String, but no help, the string is input directly fron the database. Here is some example Tôi tên là Ð?c, cu?c s?ng th?t vui v? tuy?t v?i It does not show the special character like : Ð or ?... instead it show up ?, much worse with the Encoding class. Does anyone can try this out or know about this problem? Thank you My code static void Main(string[] args) { XDataContext _new = new XDataContext(); Console.OutputEncoding = Encoding.GetEncoding("UTF-8"); string srcString = _new.Posts.First().TITLE; Console.WriteLine(srcString); // Convert the UTF-16 encoded source string to UTF-8 and ASCII. byte[] utf8String = Encoding.UTF8.GetBytes(srcString); byte[] asciiString = Encoding.ASCII.GetBytes(srcString); // Write the UTF-8 and ASCII encoded byte arrays. Console.WriteLine("UTF-8 Bytes: {0}", BitConverter.ToString(utf8String)); Console.WriteLine("ASCII Bytes: {0}", BitConverter.ToString(asciiString)); // Convert UTF-8 and ASCII encoded bytes back to UTF-16 encoded // string and write. Console.WriteLine("UTF-8 Text : {0}", Encoding.UTF8.GetString(utf8String)); Console.WriteLine("ASCII Text : {0}", Encoding.ASCII.GetString(asciiString)); Console.WriteLine(Encoding.UTF8.GetString(utf8String)); Console.WriteLine(Encoding.ASCII.GetString(asciiString)); } and here is the outstanding output Nhà báo Ä‘i há»™i báo Xuân UTF-8 Bytes: 4E-68-C3-A0-20-62-C3-A1-6F-20-C4-91-69-20-68-E1-BB-99-69-20-62-C3- A1-6F-20-58-75-C3-A2-6E ASCII Bytes: 4E-68-3F-20-62-3F-6F-20-3F-69-20-68-3F-69-20-62-3F-6F-20-58-75-3F- 6E UTF-8 Text : Nhà báo Ä‘i há»™i báo Xuân ASCII Text : Nh? b?o ?i h?i b?o Xu?n Nhà báo Ä‘i há»™i báo Xuân Nh? b?o ?i h?i b?o Xu?n Press any key to continue . . .

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  • Image Recognition (Shape recognition)

    - by mqpasta
    I want to recognize the shapes in the picture by template matching.Is the "ExhaustiveTemplateMatching" is the right option given in Aforge.Net for this purpose.Had anyone tried this class and find it working correctly.How accurate and right choice this class is for achieving my purpose.Suggest any other methods or Alogrithms as well for recognizing shapes by matching template.For example Identifying ComboBox in a picture.

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  • How can I use Functions in VB.NET that's not in App_code

    - by megatoast
    I am currently working with an IPhone API which consist of about 40 pages of aspx along with their respective aspx.vb pages. They are all partial classes because the API continues to add other phone platforms to it. Currently I have them residing just in a folder. /API/0.1 and /API/1.0 ... How would I call the functions from those IPhone API classes without having to put them in the App_code? example: I have a partial class SetTextBroadcast with a function like this Function BroadcastMessage(ByVal Brodcast_recipient() As net.pmgateway.Recipient, ByVal str_Message As String) As net.pmgateway.Reply 'code here End Function How do i use that function in a webform? or do I need to put it in App_Code? something like this is what i'm looking for. Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim objSetTextBroadCast as new SetTextBroadCast() End Sub but i get type "SetTextBroadCast" not defined. thanks for your help

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  • how to create multiple selections in text edit box in qt4?

    - by Ronny
    Qt3.3 used to allow for multiple selections in the QTextEdit widget by calling the setSelection() function and specifying a different selection id (selNum) as the last argument in that function. In Qt4, to create a selection, I do it by creating a QTextCursor object and call the setPosition() or movePosition() methods. I have no problems being able to create a single selection of text. I am, however, unable to find a way to create multiple selections. The methods in Qt4 do not have an argument which allows you to set a selection id, nor can i find any other function in the QTextCursor or QTextEdit which looks like it might allow me to do so. Has this feature been completely removed from Qt4? or has is there a new and different way of doing it? Thanks. Ronny

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  • FreeBSD Traffic Shaping

    - by alexus
    Hi I'm trying to do traffic shaping with FreeBSD, here are my rules su-3.2# ipfw show | grep pipe 08380 1514852 125523804 pipe 1 tcp from any to any dst-port 80 su-3.2# ipfw pipe 1 show 00001: 2.000 Mbit/s 0 ms 50 sl. 1 queues (1 buckets) droptail mask: 0x00 0x00000000/0x0000 - 0x00000000/0x0000 BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp 0 tcp 64.237.55.83/60598 72.21.81.133/80 6520267 1204533020 0 0 1216 su-3.2# first of all why when I run ipfw pipe 1 show i get same source and destination ip, that doesnt seem like ever change yet total packets/bytes increasing and most important question, after donig all that I'm looking at my MRTG stats and I see i'm very well over 2Mbit/s limit. what am I doing wrong? here is config file flush pipe flush pipe 1 config bw 2Mbit/s add 100 allow ip from any to any via lo0 add 200 deny ip from any to 127.0.0.0/8 add 300 deny ip from 127.0.0.0/8 to any add 8380 pipe 1 tcp from any to any src-port www uid daemon add 8380 pipe 1 tcp from any to any dst-port www uid daemon add 65000 pass all from any to any

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  • What's throttling the database?

    - by Troels Arvin
    Hardware: Intel x86_64 with 192GB of RAM. OS: CentOS 5.4 x86_64. DBMS: DB2 v. 9.7.1 64 bit. During certain special workloads (e.g. parallel REORGs/RUNSTATs), I've seen the server transporting 450MB/s with 25000IO/s (yes, there is probably some storage system caching happening here) while all CPU cores were happily working in an even mix of usermode/wait. And disk benchmark tools can also bring some very satisfying bandwith and IO/s numbers to the table. On the other hand, we also have another scenario: A single rather complex query with at least one large table scan. db2's "list applications" reports that the query is Executing (not locked). IO: At most 10MB/s, 500 IO/s; CPU: two cores in 99.9% wait state, all other cores 100% idle. The tables which the query reads from have been altered to have LOCKSIZE=TABLE, so I would think that lock list work is zero. What's going on in such a situation? What tools/snapshots/... can I use to gain better insight in such a case?

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  • Urgent SSH Local Port Redirection

    - by Salina Odelva
    Hi, everyone. I have a shell account but the admin has restricted ssh access to the server. The server is listening on 0.0.0.0:22 but the firewall blocks any incoming attempts to this port. He says he is doing maintenance but I don't believe him and I need to backup my stuff with ssh. My question is that: Is it possible to do this: Me (Wan IP) <- Hosting Server (tcp/8080) redirects to Hosting Server (tcp/22) I don't want to involve my own linux machine in this and I can only make use of ssh.. Thanks!!

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  • Blue screen of death when moving files

    - by kevin
    i just bought a new hp amd II athlon quad core and everytime i try to move file off my desktop to a hard drive or off my hard drive to my desktop of atleast a 1g or more my computer restarts itself and gives me the blue screen of death can someone please tell me why

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  • XAMPP + Windows 7 + ImageMagick = Impossible?

    - by jasondavis
    For some reason, over the past year I have tried to install imagemagick on my windows 7 machine running with XAMPP server (a LAMP package for windows) and I have failed every single try to the point that I think it is impossible, some people claim to have done it but I have yet to see it with my own eyes, I have tried every tutorial, user directions, instructions, you name it. WHy is it nearly impossible?

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  • Checkbox 'Checked' in ListView is restored after scrolling

    - by adrianrdzv
    I'm having the following problem: I have a ListActivity, which its ListView is composed by an icon, text and a checkbox (using LayoutInflater). The Adapter for the ListView extends ResourceCursorAdapter (i.e. the data source of the ListView is retrieved from a database, also the Checked status of each row) Everything works pretty Ok, except when I uncheck/check the checkbox in any row, if I scroll down until the modified checkbox is no longer visible, and then scroll up, the checkbox is restored to its original state. The database IS modified, this is not the problem (i.e. if I modify a row and exit the activity, and enter again, the modified row is displayed Ok). My guess is that this has something to do on how the list is rendered because for some reason the ListView "renders" the original state of all rows when it was first populated when scrolling. I've been looking around for this bug but I don't find anybody that had this problem. I appreciate any advice you have.

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