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• How can I avoid the overflow when wheel scolling WPF DataGrid

  - by Jan Bannister

  When I use the mouse wheel to scroll the WPF Toolkit DataGrid on a Vista 64 Machine I get a cryptic low level error: at System.IntPtr.op_Explicit(IntPtr value) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) I logged an issue on CodePlex. But has anyone found a way to resolve this already?

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• Windows API calls from assembly while minimizing program size

  - by takteek

  I'm trying to write a program in assembly and make the resulting executable as small as possible. Some of what I'm doing requires windows API calls to functions such as WriteProcessMemory. I've had some success with calling these functions, but after compiling and linking, my program comes out in the range of 14-15 KB. (From a source of less than 1 KB) I was hoping for much, much less than that. I'm very new to doing low level things like this so I don't really know what would need to be done to make the program smaller. I understand that the exe format itself takes up quite a bit of space. Can anything be done to minimize that? I should mention that I'm using NASM and GCC but I can easily change if that would help.

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• SharePoint ECMAScript: Web.DoesUserHavePermissions()

  - by Donaldinio

  I am trying to determine the permission level of the current user using the ECMAScript client OM. The following code always returns 0. Any thoughts? function Initialize() { clientContext = new SP.ClientContext.get_current(); web = clientContext.get_web(); clientContext.load(web); clientContext.executeQueryAsync(Function.createDelegate(this, this.onSiteLoadSuccess), Function.createDelegate(this, this.onQueryFailed)); } function isUserWebAdmin() { var permissionMask = null; permissionMask = new SP.BasePermissions(); permissionMask.set(SP.PermissionKind.manageWeb); var result = new SP.BooleanResult(); result = web.doesUserHavePermissions(permissionMask); alert(result.get_value()) }

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• Using a Filter to serve a specific page?

  - by user246114

  Hi, I am using a class which implements Filter for my jsp stuff. It looks like this: public class MyFilter implements Filter { public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.getRequestDispatcher("mypage.jsp").forward(request, response); } } So the target, "mypage.jsp", is just sitting in my top-level directory. The filter works fine if I'm entering urls like: http://www.mysite.com/foo http://www.mysite.com/boo but if I enter a trailing slash, I'll get a 404: http://www.mysite.com/foo/ http://www.mysite.com/boo/ HTTP ERROR: 404 /foo/mypage.jsp RequestURI=/foo/mypage.jsp it seems if I enter the trailing slash, then the filter thinks I want it to look for mypage.jsp in subfolder foo or boo, but I really always want it to just find it at: http://www.mysite.com/mypage.jsp how can I do that? Thank you

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• How do I draw the desktop on Mac OS X?

  - by Dominic Cooney

  I want to draw the desktop on Mac OS X (Snow Leopard). Specifically, I want to achieve the same effect as running: /System/Library/Frameworks/ScreenSaver.framework/Resources/ ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background (If you’re not near your computer, this displays the screensaver where you would normally see your desktop background.) I know how to make a window without a border (by subclassing NSWindow and overriding initWithContentRect:styleMask:backing:defer: to set the window style to NSBorderlessWindowMask) and without a shadow (setHasShadow:NO.) I know that I can call setLevel:kCGDesktopWindowLevel or kCGDesktopIconWindowLevel to put my window below other windows (see question 418791.) However this isn’t exactly what I want, because a window at this level is still on top of the desktop icons. I want to be on top of the desktop background, but below the icons. My view is opaque. If there is a technique that clobbers the desktop background, that is OK.

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• Specification: Use cases for CRUD

  - by Mario Ortegón

  I am writing a Product requirements specification. In this document I must describe the ways that the user can interact with the system in a very high level. Several of these operations are "Create-Read-Update-Delete" on some objects. The question is, when writing use cases for these operations, what is the right way to do so? Can I write only one Use Case called "Manage Object x" and then have these operations as included Use Cases? Or do I have to create one use case per operation, per object? The problem I see with the last approach is that I would be writing quite a few pages that I feel do not really contribute to the understanding of the problem. What is the best practice?

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• log4j/log4cxx : exclusive 1 to 1 relation between logger and appender

  - by Omry

  Using the xml configuration of log4cxx (which is identical in configuration to log4j). I want to have a certain logger output exclusively to a specific appender (have it the only logger which outputs to that appender). I found that it's possible to bind a logger to a specific appender like this: <logger name="LoggerName"> <level value="info"/> <appender-ref ref="AppenderName"/> </logger> but it that logger still outputs to the root appender because I have this standard piece in the conf file: <root> <priority value="DEBUG"/> <appender-ref ref="OtherAppender"/> </root> How can I exclude that logger from the root logger? in other words, how do I configure the log such that all loggers inherit the appenders of the root logger except a specific logger?

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• Metro + Jetty + OSGi = pain

  - by mjgp2

  I am trying to swap out Sun's HTTPServer for the much better Jetty server, within an OSGi bundle, running on Equinox. I have tried this: System.setProperty("com.sun.net.httpserver.HttpServerProvider","org.mortbay.jetty.j2se6.JettyHttpServerProvider"); but when endpoint.publish(url) is called, and the server is spawned, it complains of a ClassNotFoundException for org.mortbay.jetty.j2se6.JettyHttpServerProvider. However, the correct jars are in the bundle, and indeed in the Activator I can instantiate a org.mortbay.jetty.j2se6.JettyHttpServerProvider. I think that this is a some kind of classpath issue - the spawned server is in a different classpath maybe? I have tried adding the JARs in at the JDK level, but this doesn't make any difference. Can oanyone shed any light how on earth to get this working? P.S. Maybe hideous System.setProperty calls will vanish from the world one day. Hopefully :)

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• How to mutate rows of data frame - replacing one value with another

  - by rhh

  I'm having trouble with what I think is a basic R task. Here's my sample dataframe named 'b' Winner Color Size Tom Yellow Med Jerry Yellow Lar Jane Blue Med where items in the Winner column are factors. I'm trying to change "Tom" in the dataframe to "Tom LLC" and I can't get it done. Here's what I tried: Simple way: b$winner[b$winner=='Tom'] = as.factor('Tom LLC') but that failed with "invalid factor level, NAs generated" Next I tried a more advanced route: name_reset = function (x, y, z) { if (x$winner == y) {x$winner = z} } b = adply(b,1,name_reset,'Tom','Tom LLC') but that failed with "Error in list_to_dataframe(res, attr(.data, "split_labels")) : Results are not equal lengths" I feel I'm missing something basic. Can someone redirect me or offer suggestions on the code I wrote above? Thank you very much

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• Send Keyboard Events from one Form to another Form

  - by thalm

  Hello, my question is quite simple: Our C# application has one MainForm with a menu and several keyboard shortcuts associated with the menu entries. Now we need to trigger the menu entries from some child forms too. But since the MainForm is inactive when one of the child forms is active, the shortcuts do not work. Is there a simple way to propagate all keyboard events from the child form to the 'Owner' form? Or just to another form in general? Ah, and we cannot use some low level windows stuff, because we need to run the application on Mono/Linux too.

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• MySQL - are FK's useful / viable in a web app?

  - by yoda

  Hi all, I've encountered this discussion related to FK's and web applications. Basically some people say that FK's in web applications doesn't represent a real improvement and can even make the application slower in some cases. What do you guys think, what's your experience? -- A quote from Heikki Tuuri, creator of InnoDB engine, founder and CEO of Innobase: InnoDB checks foreign keys as soon as a row is updated, no batching is performed or checks delayed till transaction commit Foreign keys are often serious performance overhead, but help maintain data consistency Foreign Keys increase amount of row level locking done and can make it spread to a lot of tables besides the ones directly updated

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• Paypal subscribe now button

  - by Bharadwaj

  Hi, I have built an information portal in PHP [Something like a recipe book], where the first few recipes are free to access. The advanced recipes are available only to paid members. I intend to use a simple subscribe now paypal button. When the user clicks on this button, he is directed to paypal website and upon payment redirected to my site. How do I collect the payment information from paypal? I do not want to use a wsdl. I need the information to update my user level field [0 for registered users, 1 for paid users] in the users table. Any pointers? Does IPN do the trick for this? Is there a better solution for this? Thanks, Bharadwaj

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• What features of interpreted languages can a compiled one not have?

  - by sub

  Interpreted languages are usually more high-level and therefore have features as dynamic typing (including creating new variables dynamically without declaration), the infamous eval and many many other features that make a programmer's life easier - but why can't compiled languages have these as well? I don't mean languages like Java that run on a VM, but those that compile to binary like C(++). I'm not going to make a list now but if you are going to ask which features I mean, please look into what PHP, Python, Ruby etc. have to offer. Which common features of interpreted languages can't/don't/do exist in compiled languages? Why?

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• Opting out of `dragenter` and `dragover` events (html5)

  - by aaaidan

  I have a collection of draggable "content" elements, and a root-level "feedback" UI element which is displayed above them to provide feedback during drag and drop. The problem is, during the drag operation, hovering over the "feedback" element causes the dragenter and dragover events to be fired on that element, rather than the underlying content element. It effectively "blocks" the dragenter event from firing on the correct element. Is there a way for an element to cancel, or "opt out" of a dragenter/dragover event? I could display the feedback element underneath the content, but I'd rather not do that. jsFiddle: http://jsfiddle.net/jact8/1/ I'm using the HTML drag/drop api, not jQuery or anything like that.

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• how to config grails1.2 with oscache?

  - by wavelet

  I do this : DataSource.groovy: hibernate { cache.use_second_level_cache=true cache.use_query_cache=true cache.provider_class='com.opensymphony.oscache.hibernate.OSCacheProvider' } and in BuildConfig.groovy: inherits( "global" ) { // uncomment to disable ehcache excludes 'ehcache' } runtime ("opensymphony:oscache:2.4.1") { excludes 'jms', 'commons-logging', 'servlet-api' } but i only get this error : commons.DefaultGrailsApplication The class [com.ai.scenter.service.reschange.ResourceChangeAdapter] was not found when attempting to load Grails application. Skipping. commons.DefaultGrailsApplication The class [com.ai.scenter.service.reschange.ResourceChangeService] was not found when attempting to load Grails application. Skipping. hibernate.ConfigurableLocalSessionFactoryBean There was an error configuring the Hibernate second level cache: could not instantiate CacheProvider [com.opensymphony.oscache.hibernate.OSCacheProvide] hibernate.ConfigurableLocalSessionFactoryBean This is normally due to one of two reasons. Either you have incorrectly specified the cache provider class name in [DataSource.groovy] or you do not have the cache provider on your classpath (eg. runtime ("net.sf.ehcache:ehcache:1.6.1")) how can i do it?

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• Building highly scalable web services

  - by christopher-mccann

  My team and I are in the middle of developing an application which needs to be able to handle pretty heavy traffic. Not facebook level but in the future I would like to be able to scale to that without massive code re-writes. My thought was to modularise out everything into seperate services with their own interfaces. So for example messaging would have a messaging interface that might have send and getMessages() as methods and then the PHP web app would simply query this interface through soap or curl or something like that. The messaging application could then be any kind of application so a Java application or Python or whatever was suitable for that particular functionality with its own seperate database shard. Is this a good approach?

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• htaccess - Redirects with more than 1 slash not working

  - by barfoon

  Hey everyone, Just moved to shared hosting on GoDaddy and Im trying to get my .htaccess rules working. Heres what I have: ErrorDocument 404 /error.php Options FollowSymLinks RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} ^www\.mydomain\.org$ RewriteRule ^(.*)$ http://mydomain.org/$1 [R=301,L] RewriteRule ^view/(\w+)$ viewitem.php?itemid=$1 [R=301,L] RewriteRule ^category/(\w+)$ viewcategory.php?tag=$1 [R=301,L] RewriteRule ^faq$ faq.php RewriteRule ^about$ about.php RewriteRule ^contact$ contact.php RewriteRule ^submit$ submit.php RewriteRule ^contactmsg$ handler-contact.php All the pages @ the root of the domain seem to be working i.e mydomain.org/faq, mydomain.org/about are working. But whenever I try mydomain.org/category/somecategory, I get a 404. How can I fix my .htaccess to obey these rules that are more than 1 level deep? Thanks,

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• ASP.NET MVC thinks my virtual directory is a controller

  - by kmehta

  I have a virtual directory under my MVC website in IIS called "Files". This directory is at the same level as my Views directory. When I link to a file from my MVC app to a file under my Files directory, I get the following error: The controller for path '/Files/Images/1c7f7eb8-5d66-4bca-a73a-4ba6340a7805.JPG' was not found or does not implement IController. It thinks that my Files VD is a controller. How do I access my files like a normal VD without MVC interfering? Thanks.

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• Dealing with dependencies between WCF services when using Castle Windsor

  - by Georgia Brown

  I have several WCF services which use castle windsor to resolve their dependencies. Now I need some of these services to talk to each other. The typical structure is service -- Business Logic -- DAL The calls to the other services need to occur at Business Logic level. What is the best approach for implementing this? Should I simply inject a service proxy into the business logic? Is this wasteful if for example, only one of two method from my service need to use this proxy? What if the services need to talk to each other? - Will castle windsor get stuck in a loop trying to resolve each services dependencies?

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• iPhone CoreData: How can I track/observe all changes within a subgraph?

  - by D Carney

  I have a NSManagedObjectContext in which I have a number of subclasses of NSManagedObjects such that some are containers for others. What I'd like to do is watch a top-level object to be notified of any changes to any of its properties, associations, or the properties/associations of any of the objects it contains. Using the context's 'hasChanges' doesn't give me enough granularity. The objects 'isUpdated' method only applies to the given object (and not anything in its associations). Is there a convenient (perhaps, KVO-based) was I can observe changes in a context that are limited to a subgraph?

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• Accessing the DI container from anywhere

  - by ChrisR

  I've implemented the Symfony2 Dependency Injection container in my Zend Framework project and it works fine in the MVC layer of my application. I've initialized the DIC in my bootstrap and can access it anywhere by calling: Zend_Controller_Front::getInstance()->getParam('bootstrap')->getDic() The problem is that there are some parts of my application that do not utilize the Zend Framework application/MVC layer. My CLI tools for example. I could perfectly initialize a new DIC there but that would just be some copy paste work from the Bootstrap file which is asking for trouble down the road (DRY principles, etc) Is it a better solution to make my DIC available in the Zend_Registry or as a singleton called by a static method DIC::getInstance() for example? I know Registry and singletons are considered bad things but the DIC is such a high level part of the application that I will probably never run into the problems that make it a bad thing. Is this a good solution or are there better ways of accomplishing a globally accessible DIC?

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• Swift CMutablePointers in factories e.g. NewMusicSequence

  - by Gene De Lisa

  How do you use C level factory methods in Swift? Let's try using a factory such as NewMusicSequence(). OSStatus status var sequence:MusicSequence status=NewMusicSequence(&sequence) This errors out with "error: variable 'sequence' passed by reference before being initialized". Set sequence to nil, and you get EXC_BAD_INSTRUCTION. You can try being explicit like this: var sp:CMutablePointer<MusicSequence>=nil status=NewMusicSequence(sp) But then you get a bad access exception when you set sp to nil. If you don't set sp, you get an "error: variable 'sp' used before being initialized" Here's the reference.

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• Do i need to insert one fake row in database ?

  - by Ankit Rathod

  Hello, I have few tables like example. Users Books UsersBookPurchase UID BookId UserId UName Name BookId Password Price Email This is fine. I am having my own login system but i am also using some 3rd party to validate like OpenID or facebook Authetication. My question is if the user is able to log in successfully using OpenID or facebook Authentication, what steps do i need to do i.e do i have to insert one fake row in Users table because if i do not insert how will integrity be maintained. I mean what user id should i insert in UsersBookPurchase when the person who has logged in using Facebook Authentication has made a purchase because the UserId is reference key from Users table. Please give me a high level overview of what i need to do because this is fairly common scenario. Thanks in advance :)

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• Bulk stop watching tickets on Lighthouse?

  - by T.J. Crowder

  Via the Lighthouse user interface, is there any way to bulk stop watching tickets? I have more than 150 tickets on a project I want to stop watching, and would just as soon not go into each and every one of them. I thought the bulk edit command might work, but there doesn't appear to be a watch keyword in the bulk edit stuff (which is fair enough, I'm not really editing the tickets). When I go to my profile, I can subscribe or unsubscribe to an entire project, but I'm not seeing a way to do this at the (bulk) ticket level. Looking at a list of the tickets I'm watching, I'm not seeing a way to do anything to all of them (other than the bulk edit command of course). Is there something I'm missing?

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• Cisco ASA5505 8.2 Multiple Outside IP to Multiple Inside IP

  - by GriffJ

  Trying to setup ASA5505. Semi working but having issues with accessing services from the outside. ASA5505 Basic License, Version 8.2. (plus upgrade to unlimited inside hosts). Alert: I'm a Cisco Noob. 321.321.39.X is a place holder for privacy. I came up with this config and tested it tonight. ASA Version 8.2(1) ! hostname <removed> domain-name <removed> enable password <removed> encrypted passwd <removed> encrypted names ! interface Vlan1 nameif inside security-level 100 ip address 172.21.36.1 255.255.252.0 ! interface Vlan2 nameif outside security-level 0 ip address 321.321.39.10 255.255.255.248 ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 ! interface Ethernet0/2 ! interface Ethernet0/3 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! ftp mode passive dns server-group DefaultDNS domain-name <removed> access-list outside_inbound extended permit tcp any host 321.321.39.10 eq pptp access-list outside_inbound extended permit tcp any host 321.321.39.11 eq https access-list outside_inbound extended permit tcp any host 321.321.39.11 eq 993 access-list outside_inbound extended permit tcp any host 321.321.39.11 eq smtp access-list outside_inbound extended permit tcp any host 321.321.39.11 eq 1001 access-list outside_inbound extended permit tcp any host 321.321.39.11 eq 465 access-list outside_inbound extended permit tcp any host 321.321.39.11 eq domain access-list outside_inbound extended permit udp any eq domain host 321.321.39.11 eq domain access-list outside_inbound extended permit tcp any host 321.321.39.12 eq www access-list outside_inbound extended permit tcp any host 321.321.39.12 eq https access-list outside_inbound extended permit tcp any host 321.321.39.13 eq www access-list outside_inbound extended permit tcp any host 321.321.39.13 eq https access-list outside_inbound extended permit icmp any any echo-reply access-list outside_inbound extended permit icmp any any source-quench access-list outside_inbound extended permit icmp any any unreachable access-list outside_inbound extended permit icmp any any time-exceeded access-list outside_inbound extended permit icmp any any traceroute access-list outside_inbound extended permit icmp any any echo pager lines 24 logging asdm informational mtu inside 1500 mtu outside 1500 icmp unreachable rate-limit 1 burst-size 1 no asdm history enable arp timeout 14400 global (outside) 2 321.321.39.11-321.321.39.14 netmask 255.255.255.248 global (outside) 1 interface nat (inside) 1 0.0.0.0 0.0.0.0 static (inside,outside) tcp interface pptp 172.21.37.20 pptp netmask 255.255.255.255 static (inside,outside) 321.321.39.11 172.21.37.14 netmask 255.255.255.255 static (inside,outside) 321.321.39.12 172.21.37.24 netmask 255.255.255.255 static (inside,outside) 321.321.39.13 172.21.37.17 netmask 255.255.255.255 access-group outside_inbound in interface outside route outside 0.0.0.0 0.0.0.0 321.321.39.9 1 route inside 192.168.15.0 255.255.255.0 172.21.36.52 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute timeout tcp-proxy-reassembly 0:01:00 dynamic-access-policy-record DfltAccessPolicy http server enable http 172.21.36.0 255.255.252.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 telnet 172.21.36.0 255.255.252.0 inside telnet timeout 60 ssh timeout 5 console timeout 0 threat-detection basic-threat threat-detection statistics access-list no threat-detection statistics tcp-intercept webvpn ! class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect sqlnet inspect skinny inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp inspect pptp inspect ipsec-pass-thru inspect http ! service-policy global_policy global prompt hostname context The servers that had static forwards did not have any outside network access. couldn't ping google.com for instance. mail server couldn't Domain POP the Barracuda spam filter from our ISP etc. So after doing some reading I removed the statics for 172.21.37.11, 12 and 13, and replaced those three with what's below.. static (inside,outside) tcp 321.321.39.11 https 172.21.37.14 https netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.11 993 172.21.37.14 993 netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.11 smtp 172.21.37.14 smtp netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.11 1001 172.21.37.14 1001 netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.11 465 172.21.37.14 465 netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.11 domain 172.21.37.14 domain netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.12 www 172.21.37.24 www netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.12 https 172.21.37.24 https netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.13 www 172.21.37.17 www netmask 255.255.255.255 static (inside,outside) tcp 321.321.39.13 https 172.21.37.17 https netmask 255.255.255.255 Now the servers (for instance 172.21.37.14) could ping the outside world again. Mail started flowing (Domain POP was successful) etc. etc. But I forgot to check if webmail worked from the outside admittedly. But the webservers at 172.21.37.17 and 172.21.37.24 still didn't respond from the outside world. Although I was able to PPTP VPN in on 321.321.39.10 (interface) which is the outside interface IP address. and it is static mapped to 172.21.37.20. So I'm thinking there must be something wrong with NAT somewhere? no response from 321.321.39.11 to 321.321.39.14.. Could anyone look over the config and please let me know what I've done wrong? Is there something I've missed? well obviously but.. please help! Thank you.

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