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  • [OpenGl] Loading new texture into already defined texture name

    - by Dan Vogel
    I have an OpenGl program in which I am displaying an image using textures. I want to be able to load a new image to be displayed. In my Init function I call: Gl.glGenTextures(1, mTextures); Since only one image will be displayed at time, I am using the same texture name for each image. Each time a new image is loaded I call the following: Gl.glBindTexture(Gl.GL_TEXTURE_2D, mTexture[0]); Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_LUMINANCE, mTexSizeX, mTexSizeY, 0, Gl.GL_LUMINANCE, Gl.GL_UNSIGNED_SHORT, mTexBuffer); Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR); Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR); The first image will display as expected. However, all images load after the first, display as all black. What am I doing wrong?

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  • Drawing selected state on custom UITableViewCell

    - by Brian
    So I have a customer UITableViewCell whose whole display in drawn in drawRect. When it draws it creates CGLayers so that it can reuse certain pieces when something is changed. I have changed my UITableViewCellSelectionStyle to None because I don't want the default selected view to cover my drawing. So I call setNeedsDisplay in setSelected:animated: for my cell. But by the time drawRect is called, setSelected:animated: has already been called again to deselect the cell. In my table view controller in didSelectRowAtIndexPath I call deselectRowAtIndexPath as Apple advises. Any ideas? Thanks.

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  • How to use V8's built in functions

    - by Victor jiang
    I'm new in both javascript and V8. According to Google's Embedder's Guide, I saw something in the context section talking about built-in utility javascript functions. And I also found some .js files(e.g. math.js) in the downloaded source code, so I tried to write a simple program to call functions in these files, but I failed. Does a context created by Persistent<Context> context = Context::New() have any built-in js functions? How can I access them? Is there a way to first import existing js files as a library(something like src="xxx" type="text/javascript" in HTML page) and then run my own execute script? Can I call google maps api through the embedded V8 library in app? How?

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  • South migration error: NoMigrations exception for django.contrib.auth

    - by danpalmer
    I have been using South on my project for a while, but I recently did a huge amount of development and changed development machine and I think something messed up in the process. The project works fine, but I can't apply migrations. Whenever I try to apply a migration I get the following traceback: danpalmer:pest Dan$ python manage.py migrate frontend Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 362, in execute_manager utility.execute() File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 222, in execute output = self.handle(*args, **options) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/management/commands/migrate.py", line 102, in handle delete_ghosts = delete_ghosts, File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/migration/__init__.py", line 182, in migrate_app applied = check_migration_histories(applied, delete_ghosts) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/migration/__init__.py", line 85, in check_migration_histories m = h.get_migration() File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/models.py", line 34, in get_migration return self.get_migrations().migration(self.migration) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/models.py", line 31, in get_migrations return Migrations(self.app_name) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/migration/base.py", line 60, in __call__ self.instances[app_label] = super(MigrationsMetaclass, self).__call__(app_label_to_app_module(app_label), **kwds) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/migration/base.py", line 88, in __init__ self.set_application(application, force_creation, verbose_creation) File "/Library/Python/2.6/site-packages/South-0.7-py2.6.egg/south/migration/base.py", line 159, in set_application raise exceptions.NoMigrations(application) south.exceptions.NoMigrations: Application '<module 'django.contrib.auth' from '/Library/Python/2.6/site-packages/django/contrib/auth/__init__.pyc'>' has no migrations. I am not that experienced with South and I haven't met this error before. The only helpful mention I can find online about this error is for pre-0.7 I think and I am on South 0.7. I ran 'easy_install -U South' just to make sure. Thanks for any help that you can provide. I really appreciate it.

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  • Is it a Good Practice to Write HTML Using a StringBuilder in my ASP.NET Codebehind?

    - by d3020
    I'm interested to hear from other developers their opinion on an approach that I typically take. I have a web application, asp.net 2.0, c#. What I usually do to write out drop downs, tables, input controls, etc. is in the code behind use StringBuilder and write out something like sb.Append(" I don't find myself using to many .net controls as I typically write out the html in the code behind. When I want to use jQuery or call JavaScript I just put that function call in my sb.Append tag like sb.Append("td...onblur='fnCallJS()'. I've gotten pretty comfortable with this approach. For data access I use EntitySpaces. I'm just kind of curious if this sort of approach is horribly wrong, ok depending on the context, good, time to learn 3.0, etc. I'm interested in learning and was just looking for some input.

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  • ajax: don't wait for response, but check for it periodically

    - by dnagirl
    I have a PHP process that takes a long time to run. I don't want the AJAX process that calls it to wait for it to finish. When the PHP process finishes it will set a field in a database. There should be some kind of AJAX polling call to check on the database field periodically and set a message. How do I set up a jQuery AJAX call to poll rather than wait? Does the PHP script have to do anything special?

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  • How can I properly use environment variables encoded as Windows-1251 in Perl?

    - by Kartlee
    I have an environment variable set in Windows as TEST=abc£ which uses Windows-1252 code page. Now, when I run a Perl program test.pl this environment value comes properly. When I call another Perl code - test2.pl from test1.pl either by system(..) or Win32::Process, the environment comes garbled. Can someone provide information why this could be and way to resolve it? The version of perl I am using is 5.8. If my understanding is right, perl internally uses utf-8, so the initial process - test1.pl received it right from Windows-1252 → utf-8. When we call another process, should we convert back to Windows-1252 code page?

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  • Named pipe is not flushing in Python

    - by BrainCore
    I have a named pipe created via the os.mkfifo() command. I have two different Python processes accessing this named pipe, process A is reading, and process B is writing. Process A uses the select function to determine when there is data available in the fifo/pipe. Despite the fact that process B flushes after each write call, process A's select function does not always return (it keeps blocking as if there is no new data). After looking into this issue extensively, I finally just programmed process B to add 5KB of garbage writes before and after my real call, and likewise process A is programmed to ignore those 5KB. Now everything works fine, and select is always returning appropriately. I came to this hack-ish solution by noticing that process A's select would return if process B were to be killed (after it was writing and flushing, it would sleep on a read pipe). Is there a problem with flush in Python for named pipes?

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  • Client side code snipets

    - by raghu.yadav
    function clientMethodCall(event) { component = event.getSource(); AdfCustomEvent.queue(component, "customEvent",{payload:component.getSubmittedValue()}, true); event.cancel(); } ]]-- <af:document>      <f:facet name="metaContainer">      <af:group>        <!--[CDATA[            <script>                function clientMethodCall(event) {                                       component = event.getSource();                    AdfCustomEvent.queue(component, "customEvent",{payload:component.getSubmittedValue()}, true);                                                     event.cancel();                                    }                 </script> ]]-->      </af:group>    </f:facet>      <af:form>        <af:panelformlayout>          <f:facet name="footer">          <af:inputtext label="Let me spy on you: Please enter your mail password">            <af:clientlistener method="clientMethodCall" type="keyUp">            <af:serverlistener type="customEvent" method="#{customBean.handleRequest}">          </af:serverlistener>bean code    public void handleRequest(ClientEvent event){                System.out.println("---"+event.getParameters().get("payload"));            } tree<af:tree id="tree1" value="#{bindings.DepartmentsView11.treeModel}" var="node" selectionlistener="#{bindings.DepartmentsView11.treeModel.makeCurrent}" rowselection="single">    <f:facet name="nodeStamp">      <af:outputtext value="#{node}">    </af:outputtext>    <af:clientlistener method="expandNode" type="selection">  </af:clientlistener></f:facet>   <f:facet name="metaContainer">        <af:group>          <!--[CDATA[            <script>                function expandNode(event){                    var _tree = event.getSource();                    rwKeySet = event.getAddedSet();                    var firstRowKey;                    for(rowKey in rwKeySet){                       firstRowKey  = rowKey;                        // we are interested in the first hit, so break out here                        break;                    }                    if (_tree.isPathExpanded(firstRowKey)){                         _tree.setDisclosedRowKey(firstRowKey,false);                    }                    else{                        _tree.setDisclosedRowKey(firstRowKey,true);                    }               }        </script> ]]-->        </af:group>      </f:facet>   </af:tree> </af:clientlistener></af:inputtext></f:facet></af:panelformlayout></af:form></af:document> bean code public void handleRequest(ClientEvent event){ System.out.println("---"+event.getParameters().get("payload")); } tree function expandNode(event){ var _tree = event.getSource(); rwKeySet = event.getAddedSet(); var firstRowKey; for(rowKey in rwKeySet){ firstRowKey = rowKey; // we are interested in the first hit, so break out here break; } if (_tree.isPathExpanded(firstRowKey)){ _tree.setDisclosedRowKey(firstRowKey,false); } else{ _tree.setDisclosedRowKey(firstRowKey,true); } } ]]--

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  • ASP.Net MVC ReturnUrl Practice

    - by Terry
    I have a question about the returnUrl querystring parameter that is appended by ASP.Net when attempted to hit a page that requires authentication. In looking at Microsoft NerdDinner Sample's LogOn action (along with every other 'sample authentication code' I see on the 'net), it just has the ReturnUrl parameter declared in the action's signature and uses it directly in a Redirect() call. However, back in the WebForms days and using Membership Controls, we use to use the FormsAuthentication.GetReturnUrl() call. Besides returning the 'default url' if no url was specified in the querystring, it also does a few security checks (Cross App Redirect and 'IsDangerousUrl()'). Are those no longer a concern or are all the sample 'log on' actions I'm seeing all over the 'net just ignoring those issues?

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  • Returning the value of an identity column during/after INSERT command

    - by Adam Kane
    Using VS 2010, with ASP.NET, and .NET 3.0, and C#... When I use a System.Web.UI.WebControls.SqlDataSource and call its Insert() method to insert a new row, and that table has an identity column, I'd like my method to return the value of that column. For example, in my SQL 2005 table, I've got: Customer.Id Customer.FirstName Customer.LastName Where Customer.Id is an identity colum. When I call my method InsertNewCustomerRecord( "John", "Smith" ), I'd like to be able to return the Customer.Id that gets automatically generated in the database. Sorry for such a roughly posed question. Let me know if I can add better detail. Thanks.

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  • EJB3 Transaction Propogation

    - by Matt S.
    I have a stateless bean something like: @Stateless public class MyStatelessBean implements MyStatelessLocal, MyStatelessRemote { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.SUPPORTED) public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.process(obj); } } @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } The typically usage then is the client would call processObjects(...), which doesn't actually interact with the entity manager. It does what it needs to do and calls process(...) individually for each object to process. The duration of process(...) is relatively short, but processObjects(...) could take a very long time to run through everything. Therefore I don't want it to maintain an open transaction. I do need the individual process(...) operations to operate within their own transaction. This should be a new transaction for every call. Lastly I'd like to keep the option open for the client to call process(...) directly. I've tried a number of different transaction types: never, not supported, supported (on processObjects) and required, requires new (on process) but I get TransactionRequiredException every time merge() is called. I've been able to make it work by splitting up the methods into two different beans: @Stateless @TransationAttribute(TransactionAttributeType.NOT_SUPPORTED) public class MyStatelessBean1 implements MyStatelessLocal1, MyStatelessRemote1 { @EJB private MyStatelessBean2 myBean2; public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.myBean2.process(obj); } } } @Stateless public class MyStatelessBean2 implements MyStatelessLocal2, MyStatelessRemote2 { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } but I'm still curious if it's possible to accomplish this in one class. It looks to me like the transaction manager only operates at the bean level, even when individual methods are given more specific annotations. So if I mark one method in a way to prevent the transaction from starting calling other methods within that same instance will also not create a transaction, no matter how they're marked? I'm using JBoss Application Server 4.2.1.GA, but non-specific answers are welcome / preferred.

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  • C++ debugging help for C# programmer

    - by ddm
    I'm embarrassed to post this but it's been awhile since I worked in C++, been with C# for awhile. I'm converting old (not written by me) vs2003 and 05 C++ code to vs 08. In addition to lots of lumps during conversion, I want to add debug logging so I can monitor what is going on when I attach with windbg. I've searched the archives here and ms and I think it's using Debugger.Log(...) but not sure. I also remember years ago launching a debug monitor to catch the logging. So the call to some experts that have a better memory than I. What call(s) can I make (without the DEBUG compile directive - need to watch release code) to catch the logging in wind bag? I followed a couple of debugging links from SO posts but they were dead. Thanx - Old Man.

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  • Singleton again, but with multi-thread and Objective-C

    - by Tonny Xu
    I know Singleton pattern has been discussed so much. But because I'm not fully understand the memory management mechanism in Objective-C, so when I combined Singleton implementation with multithreading, I got a big error and cost me a whole day to resolve it. I had a singleton object, let's call it ObjectX. I declared an object inside ObjectX that will detach a new thread, let's call that object objectWillSpawnNewThread, when I called [[ObjectX sharedInstance].objectWillSpawnNewThread startNewThread]; The new thread could not be executed correctly, and finally I found out that I should not declare the object objectWillSpawnNewThread inside the singleton class. Here are my questions: How does Objective-C allocate static object in the memory? Where does Objective-C allocate them(Main thread stack or somewhere else)? Why would it be failed if we spawn a new thread inside the singleton object? I had searched the Objective-C language [ObjC.pdf] and Objective-C memory management document, maybe I missed something, but I currently I could not find any helpful information.

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  • Typecast to an int in Octave/Matlab

    - by Leif Andersen
    I need to call the index of a matrix made using the linspace command, and based on somde data taken from an oscilloscope. Because of this, the data inputed is a double. However, I can't really call: Time[V0Found] where V0Found is something like 5.2 however, taking index 5 is close enough, so I need to drop the decimal. I used this equation to drop the decimal: V0FoundDec = V0Found - mod(V0Found,1) Time[V0FoundDec] However, eve though that drops the decimal, octave still complains about it. So, what can I do to typecast it to an int? Thank you.

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  • Linux, static lib referring to other static lib within an executable

    - by andras
    Hello, I am creating an application, which consists of two static libs and an executable. Let's call the two static libs: libusefulclass.a libcore.a And the application: myapp libcore instantiates and uses the class defined in libusefulclass (let's call it UsefulClass) Now, if I link the application in the following way: g++ -m64 -Wl,-rpath,/usr/local/Trolltech/Qt-4.5.4/lib -o myapp src1.o src2.o srcN.o -lusefulclass -lcore The linker complains about the methods in libusefulclass not being found: undefined reference to `UsefulClass::foo()' etc. I found a workaround for this: If UsefulClass is also instantiated within the source files of the executable itself, the application is linked without any problems. My question is: is there a more clean way to make libcore refer to methods defined in libusefulclass, or static libs just cannot be linked against eachother? TIA P.S.: In case that matters: the application is being developed in C++ using Qt, but I feel this is not a Qt problem, but a library problem in general.

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  • How can I fix "[Error 6] The handle is invalid." with PySerial

    - by alnorth29
    I'm trying to connect to my phone from my Windows 7 PC using PySerial with the following code: import wmi import serial c = wmi.WMI() modem = c.query("SELECT * FROM Win32_POTSModem").pop() ser = serial.Serial(modem.AttachedTo, modem.MaxBaudRateToSerialPort) try: ser.write('at \r\n') print ser.readline() finally: ser.close() But get the following error on the write call: Traceback (most recent call last): File "D:\Alasdair\Documents\Python Scripts\Phone Interface\test.py", line 14, in <module> ser.write('at \r\n') File "C:\Python26\Lib\site-packages\serial\serialwin32.py", line 255, in write raise SerialException("WriteFile failed (%s)" % ctypes.WinError()) SerialException: WriteFile failed ([Error 6] The handle is invalid.) I've tried connecting with TeraTerm and that works fine, so it's not a problem with the connection to the phone itself. I've been searching around for ages trying to find a solution but haven't come up with anything that works. Any ideas?

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  • Linq to SQl over WCF Timesout after several calls

    - by Redeemed1
    I have a L2S Repository class which instantiates the L2S DataContext in its constructor. The repository is instantiated at run time (using Unity) in a service hosted in IIS with WCF. When I run up the client MVC applicaton the calls to the backend WCF service work for a while and then timeout. I suspected perhaps a database issue as I was depending on IIS garbage collection to dispose of unused DataContext instances in the IIS host but when I checked the characteristics of the problem I notice the following: The client makes the call to WCF but the WCF service does not respond. Next, the client times out Some time later (several minutes) the service actually executes the request by instantiating the repository and servicing the call. I have checked both client and server traces logs and only the client shows WCF errors (the timeout error). Where should I look? Is it something in WCF or is L2S possibly blocking with unfreed conenctions, resources etc.? Many thanks Brian

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  • Passing object from PHP to Mysql Stored procedure

    - by user268982
    Hi All, Scenario :- I have to call MYSQL stored procedure from PHP and do some operations ( around 15 commands ) on the database Problem :- I have to call stored procedure with 36 parameters. Lot of parameters . I don't think it is a good idea to pass these many individual parameters and even heard passing individul parameters increases network traffic. Looking for :- I created a Data Object at PHP side and is there any way I can create similar kind of Object in MYSQL and pass this object as a parameter and extract the data from the object in MYSQL stored procedure Thanks for your help Regards Kiran

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  • Clearquest Database Timeout

    - by onaclov2000
    I have a tool that is setup to query our Clearquest Database to return information to the user automatically every 9000 milliseconds. I came in today and the connection had timed out over the weekend, I found in the oSession object a "check heartbeat" function, but I'm not sure that is what I want to use to determine if i need to "re-login", I saw a db.timeoutinterval, but I can't seem to find any good reference on how to call it, since the oSession Object doesn't actually call it, and any references in the API guide mention it with regard to actually creating the db using the adminsession object. What "object" do I need to create to access the timeout interval and how? Thank you for the help! Or is it better to use the "check heartbeat function" and will it return a true or false depending on current state of login?

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  • Windows Vista, Default Programs API, file format associations, and (un)installers - explosive mix!

    - by Alex T.
    My application is a rather well behaved Windows citizen, so when I ported it to Windows Vista/7 I replaced my custom file format association code with support for the Default Programs API. However I ran into a problem when trying to make uninstaller for my application - there seems to be no way to remove file format associations via Default Programs API. I tried to call IApplicationAssociationRegistration::ClearUserAssociations but it actually removes all associations, including the ones for other applications - completely restoring default state of the OS (which is of course unacceptable). I tried to call IApplicationAssociationRegistration::SetAppAsDefault to return file format associations to the previous "owner" - but it does not help, because my application handles many unique file formats which the OS does not support and there is no previous "owners". And Windows does not allow to pass empty strings to SetAppAsDefault... So what do I do? Any good solutions?

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  • how to send sms programmatically in iphone 2.0

    - by MaheshBabu
    Hi folks, I need to send email programmatically in iphone os 2.0. some where i found NSString *url = [NSString stringWithString: @"mailto:[email protected][email protected]&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"]; [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]]; is this is code work on iphone os 2.0. similarly i need to send sms in iphone 2.0 and make a call. i found it is not possible in sending sms in iphone 2.0 and making call. is there any third party tools to send sms. can any one pls help me. Thank u in advance.

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  • Constructing / destructing QApplication causes QWebView to mess up rendering of HTML

    - by Matthias Ganninger
    We need to create & destroy instances of QApplication, as we want to use Qt in a plug-in to an existing host application. void multiQT() { int argc = 0; QApplication app(argc, NULL); QWebView view; view.setHtml("<html><head><title>Title</title></head><body><h1>Hello World</h1></body></html>"); view.show(); app.exec(); } main(int argc, char** argv) { // First call works fine, QWebView renders the HTML just fine multiQT(); // Second call fails, QWebView strips HTML tags from HTML text and // and renders "TitleHello World" multiQT(); } When showing the QWebView the second time, it does not render the HTML properly. Do we need to do some additional (re-)initializations in QApplication or QWebView?

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