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• Mac Quick Look Preview in an NSView or NSImage?

  - by Niko Matsakis

  I am looking for a way (public or otherwise) to get an NSView, NSImage, CGImageRef, etc that shows the QuickLook preview for a file. Essentially the equivalent of QLThumbnailImageCreate() but for the preview. The public APIs I can find do not support this. They allow the creation of a thumbnail image or a QLPreviewPanel. The panel does in fact display the quick look preview, but I cannot get access to the preview's appearance to embed it in other views, nor can I display multiple previews at once. For background, I am writing an app where users can embed links to other files that should be displayed inline, kind of like an <img> tag in HTML. For images like JPGs and PDFs it's easy to figure out what to display. I thought that for other formats I would use Quick Look to generate a nice visual representation of the file's contents. This way the set of formats supported by my application would be easily extensible (just download new Quick Look generators).

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• Django admin site populated combo box based on imput

  - by user292652

  hi i have to following model class Match(models.Model): Team_one = models.ForeignKey('Team', related_name='Team_one') Team_two = models.ForeignKey('Team', related_name='Team_two') Stadium = models.CharField(max_length=255, blank=True) Start_time = models.DateTimeField(auto_now_add=False, auto_now=False, blank=True, null=True) Rafree = models.CharField(max_length=255, blank=True) Judge = models.CharField(max_length=255, blank=True) Winner = models.ForeignKey('Team', related_name='winner', blank=True) updated = models.DateTimeField('update date', auto_now=True ) created = models.DateTimeField('creation date', auto_now_add=True ) def save(self, force_insert=False, force_update=False): pass @models.permalink def get_absolute_url(self): return ('view_or_url_name') class MatchAdmin(admin.ModelAdmin): list_display = ('Team_one','Team_two', 'Winner') search_fields = ['Team_one','Team_tow'] admin.site.register(Match, MatchAdmin) i was wondering is their a way to populated the winner combo box once the team one and team two is selected in admin site ?

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• How to generate and print large XPS documents in WPF?

  - by bitbonk

  I would like to generate (and then print or save) big XPS documents (400 pages) from my WPF application. We have some large amount of in-memory data that needs to be written to XPS. How can this be done without getting an OutOfMemoryException? Is there a way I can write the document in chunks? How is this usually done? Should I not be using XPS for large files in the first place? The root cause of the OutOfMemoryException seems to be the creation of the huge FlowDocument. I am creating the full FlowDocument and then sending it to the XPS document writer. Is this the wrong approach?

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• C# System.Threading.Timer and its state object

  - by Captain NedD

  I am writing a C# program that uses System.Threading.Timer to timeout on a UDP socket ReceiveAsync call. My program polls a remote device, sending a UDP packet and expecting one in return. I use the timer in one shot mode calling Timer.Change every time I want a new timeout period. For every occurance of a timeout I'd like the timeout handler to have a different piece of information. If I change the object I pass to the Timer on creation it doesn't seem to change when the handler executes. Is the only way to do this to destroy the timer and create a new one? Thanks,

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• Where to use Controller.HttpContext

  - by Ben

  Hi, In my base controller's constructor I am calling an extension method that checks for specific cookies on the client. Currently I am using System.Web.HttpContext.Current to get the current context. However, I am lead to believe that I should be using Controller.HttpContext since it is more testable and contains additional information about the request. However, Controller.HttpContext returns null on creation (believe this is by design) but also on Initialize and Execute methods (unless I use Routing.RequestContext.HttpContext?). So if I should be using Controller.HttpContext instead of HttpContext.Current, at what point is it available to me in a request? Thanks Ben

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• Django: UserProfile with Unique Foreign Key in Django Admin

  - by lazerscience

  Hi, I have extended Django's User Model using a custom user profile called UserExtension. It is related to User through a unique ForeignKey Relationship, which enables me to edit it in the admin in an inline form! I'm using a signal to create a new profile for every new user: def create_user_profile(sender, instance, created, **kwargs): if created: try: profile, created = UserExtension.objects.get_or_create(user=instance) except: pass post_save.connect(create_user_profile, sender=User) (as described here for example: http://stackoverflow.com/questions/44109/extending-the-user-model-with-custom-fields-in-django) The problem is, that, if I create a new user through the admin, I get an IntegritiyError on saving "column user_id is not unique". It doesnt seem that the signal is called twice, but i guess the admin is trying to save the profile AFTERWARDS? But I need the creation through signal if I create a new user in other parts of the system!

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• Need help understanding Generics, How To Abstract Types Question.

  - by kmacmahon

  I could use some really good links that explain Generics and how to use them. But I also have a very specific question, relater to working on a current project. Given this class constructor: public class SecuredDomainViewModel<TDomainContext, TEntity> : DomainViewModel<TDomainContext, TEntity> where TDomainContext : DomainContext, new() where TEntity : Entity, new() public SecuredDomainViewModel(TDomainContext domainContext, ProtectedItem protectedItem) : base(domainContext) { this.protectedItem = protectedItem; } And its creation this way: DomainViewModel d; d = new SecuredDomainViewModel<MyContext, MyEntityType>(this.context, selectedProtectedItem); Assuming I have 20 different EntityTypes within MyContext, is there any easier way to call the constructor without a large switch statement? Also, since d is DomainViewModel and I later need to access methods from SecuredDomainViewModel, it seems I need to do this: if (((SecuredDomainViewModel<MyContext, MyEntityType>)d).CanEditEntity) But again "MyEntityType" could actually be one of 20 diffent types. Is there anyway to write these types of statements where MyEntityType is returned from some sort of Reflection?

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• Need help understanding Generics, How To Abstract Types Question.

  - by kmacmahon

  I could use some really good links that explain Generics and how to use them. But I also have a very specific question, relater to working on a current project. Given this class constructor: public class SecuredDomainViewModel<TDomainContext, TEntity> : DomainViewModel<TDomainContext, TEntity> where TDomainContext : DomainContext, new() where TEntity : Entity, new() And its creation this way: DomainViewModel d; d = new SecuredDomainViewModel<MyContext, MyEntityType>(this.context, selectedProtectedItem); Assuming I have 20 EntityTypes within MyContext, is there any easier way to call the constructor without a large switch statement? Also, since d is DomainViewModel and I want to access methods for SecuredDomainViewModel, it seems I need to do this: if (((SecuredDomainViewModel<MyContext, MyEntityType>)d).IsBusy) But again "MyEntityType" could actually be one of 20 types. Is there anyway to write these types of statements where MyEntityType is returned from some sort of Reflection?

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• PHP, ImageMagick, Google's Page Speed, & JPG File Size Optimization

  - by Sonny

  I have photo gallery code that does image re-sizing and thumbnail creation. I use ImageMagick to do this. I ran a gallery page through Google's Page Speed tool and it revealed that the re-sized images and thumbnails both have about an extra 10KB of data (JPEG files specifically). What can I add to my scripts to optimize the file size? ADDITIONAL INFORMATION I am using the imagick::FILTER_LANCZOS filter with a blur setting of 0.9 when calling the resizeImage() function. JPEGs have a quality setting of 80.

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• Most basic, low power home surveillance system

  - by cbp

  I am thinking of setting up a simple but effective surveillance system for my house that is: Very low powered (preferably no PCs left running out of stand-by mode) Cheap. When motion (or sound) is detected, I would like it to: Send an email/phone alert to me Record and upload video to the web (in case they steal the camera) So I imagine a system where I leave a netbook PC in stand-by mode and have it woken up by a motion detector. This initiates software to send alerts and periodically upload recorded video to the web. The software part is easy for me, but I'm not really a gadget-man so I'd like some advice on using a motion sensor of some sort to wake up the PC. Does anyone have some good advice? I know there are a couple of questions dealing with this topic already (see here: http://superuser.com/questions/3054/looking-for-a-moderately-priced-home-surveillance-setup, and here: http://superuser.com/questions/2929/can-you-suggest-a-great-home-security-setup-anti-burglars-e-t-c) - I am seeking more specific information with this question.

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• windows server 2008 web edition cant change permissions

  - by minus4

  hi there, Im used to using windows server 2003 but decided to get a Vista web edition for IIS7 and to run our MVC applications on. I have installed copSSH that i use for SFTP, and when i upload my files i am unable to change persmissions or take ownership or anything when logged in as an administrator. when i try to go to permissions i get: The permissions on uploads are incorrectly ordered, which may cause some entries to be ineffective. and all permissions are the grayed out. i have tried to use icacls to reset ownership and also tried to give myself full control through icacls however all attempts are met with a access is denied message and failed processing 669 files. all i wish to do is set up write and delete permissions on an upload folder for a CMS systems admin area, but i am a week into looking into this and i am still no wiser. Please could someone give some sound advice so i can get this running smooth thanks p.s i have added the copSSH notes as i think that when i SFTP the files to the server, this may somehow have some involvement in messing up permissions

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• WIX: How can I register a new ISAPI Extension or Script Map on an existing Web App or Site?

  - by Cheeso

  I've seen the WebApplicationExtension element, but because it must be a child of WebApplication, it appears to require the creation of a new WebApplication. I don't want that. I want to create the extension (or script map) on an existing website. On uninstall, the website should remain but the extension (script map entry) should be removed. Anyone know how to do this in WIX? If I get no good answers, I guess I will have to do it within script before InstallFinalize.

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• auto-scaling size with anchors - overlapping controls

  - by Shane.C

  I'm having some trouble with resizing and scaling of controls in a windows form. I've set anchors up so that the controls stay in ratio with the form, which works great. However, perhaps i was expecting too much when i thought that the control origin points would also scale and change with the form scaling, but this is not the case and i'm finding my controls overlapping. here's some screenshots; anyone know of an approach i can take to solve this problem? perhaps i need to set control origins to dynamic drawing points that scale, but then do these redraw on scaling the form, or only on creation?

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• Getting Started with UDK

  - by Sean Edwards

  I've been trying for a couple of days now to learn UDK, but I seem to be stuck at making that leap to understanding how everything works together. I understand the syntax, that's all well and good, and I pretty much get how classes and .ini files interact. As for the API, I have the entire reference as pretty decent Doxygen-style HTML output. What I'm looking for is a sort of intermediate tutorial on game creation from scratch (as opposed to modding UT3 itself), more advanced than just learning language syntax, but not yet to the level of going through the API step by step. I'm looking for some guide to the structure of the internals - how GameInfo and PlayerController interact, where Pawn comes in, etc. - a way to visualize the big picture. Does anyone have a particular favorite intermediate-level tutorials (or set of tutorials) that they used when first learning UDK?

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• Optional one-to-one mapping in Hibernate

  - by hibernate

  How do I create an optional one-to-one mapping in the hibernate hbm file? For example, suppose that I have a User and a last_visited_page table. The user may or may not have a last_visited page. Here is my current one-to-one mapping in the hbm file: User Class: <one-to-one name="lastVisitedPage" class="LastVisitedPage" cascade="save-update"> LastVisitedPage Class: <one-to-one name="user" class="user" constrained="true" /> The above example does not allow the creation of a user who does not have a last visited page. A freshly created user has not visited any pages yet. How do I change the hbm mapping to make the userPrefs mapping optional?

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• Fox Pro Database File Locked by Shadow Copy?

  - by leeand00

  I'm using Process Explorer to determine what process has a lock on a particular Fox Pro Database file in windows. It's telling me that System has a lock on it. When I go to kill the "System" process (which if you ask me doesn't sound like a very good idea), it asks me if I'm sure I want to kill the System process. I haven't answered yes yet. It's a company server, and I'm thinking that maybe my only option is to tell everybody to get off of it and reboot. Do I have any other options?

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• JPG File Size Optimization - PHP, ImageMagick, & Google's Page Speed

  - by Sonny

  I have photo gallery code that does image re-sizing and thumbnail creation. I use ImageMagick to do this. I ran a gallery page through Google's Page Speed tool and it revealed that the re-sized images and thumbnails both have about an extra 10KB of data (JPEG files specifically). What can I add to my scripts to optimize the file size? ADDITIONAL INFORMATION I am using the imagick::FILTER_LANCZOS filter with a blur setting of 0.9 when calling the resizeImage() function. JPEGs have a quality setting of 80.

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• Reordering matrix elements to reflect column and row clustering in naiive python

  - by bgbg

  Hello, I'm looking for a way to perform clustering separately on matrix rows and than on its columns, reorder the data in the matrix to reflect the clustering and putting it all together. The clustering problem is easily solvable, so is the dendrogram creation (for example in this blog or in "Programming collective intelligence"). However, how to reorder the data remains unclear for me. Eventually, I'm looking for a way of creating graphs similar to the one below using naive Python (with any "standard" library such as numpy, matplotlib etc, but without using R or other external tools).

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• Online remount btrfs of root filesystem with different subvolume (snapshot) [migrated]

  - by goncalopp

  Let's say you have a btrfs root filesystem on an online system. You want to revert the filesystem to an earlier state, of which you have a snapshot: remount /dev/sdaX / -o remount,subvol=snapshots/Y For the record, I've done this in a test system, and it does not work. The command returns with no errors, but the subvolume mounted is the same. If this did work, what would be the consequences? My guess is that open file descriptors would still point to the old subvolume, thus possibly leading to "data loss" on the new subvolume, if one was not careful. Assuming one goes to the trouble of closing and reopening all open file descriptors, does this sound feasible? Or are there other types of problems?

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• Check packet vlan tag using Tap virtual interface

  - by ankit

  Hi all, I am trying to learn how to implement virtual interfaces using the Tap driver. So far my understanding is that using the tap driver I can create a virtual interface and then have a userspace program attach to this interface to analyse the data coming into this device. Now what if I attach a cisco switch to my LAN interface using a TRUNK link, forward all the packets coming into the LAN interface to the virtual tap interface and then in my program attached to this interface do some coding to analyze the vlan tag in the packet and only allow certain vlans to be forwarded to the WAN interface ? Does this sound plausible or is there is flaw in my basic understanding ? Thanks for the help! ankit

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• vista server 2008 web edition cant change permissions

  - by minus4

  hi there, Im used to using windows server 2003 but decided to get a Vista web edition for IIS7 and to run our MVC applications on. I have installed copSSH that i use for SFTP, and when i upload my files i am unable to change persmissions or take ownership or anything when logged in as an administrator. when i try to go to permissions i get: The permissions on uploads are incorrectly ordered, which may cause some entries to be ineffective. and all permissions are the grayed out. i have tried to use icacls to reset ownership and also tried to give myself full control through icacls however all attempts are met with a access is denied message and failed processing 669 files. all i wish to do is set up write and delete permissions on an upload folder for a CMS systems admin area, but i am a week into looking into this and i am still no wiser. Please could someone give some sound advice so i can get this running smooth thanks p.s i have added the copSSH notes as i think that when i SFTP the files to the server, this may somehow have some involvement in messing up permissions

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• Linux Kernel Module - Creating proc file - proc_root undeclared error

  - by Zach

  I copy and paste code from this URL for creating and reading/writing a proc file using a kernel module and get the error that proc_root is undeclared. This same example is on a few sites so I assume it works. Any ideas why I'd get this error? Does my makefile need something different. Below is my makefile as well: Example code for a basic proc file creation (direct copy and paste to get initial test done): http://tldp.org/LDP/lkmpg/2.6/html/lkmpg.html#AEN769 Makefile I'm using: obj-m := counter.o KDIR := /MY/LINUX/SRC PWD := $(shell pwd) default: $(MAKE) ARCH=um -C $(KDIR) SUBDIRS=$(PWD) modules

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• HP Pavilion dv3 volume control display driver on Windows 7

  - by Farinha

  I've recently bought an HP Pavilion dv3-2150ep and I'm having a hard time getting the volume control display to work as expected. The control is a back-lit touch-sensitive bar above the keyboard. Now the buttons to turn the volume up and down actually do it, but the lightning is not changing at all. The mute button does change color when toggled. I'm not sure if I'm missing any drivers here (I've installed all of those on the HP support page that seem to have something to do with sound and/or display) or if I have to activate this somewhere. Any ideas?

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• Random Gui errors using C# Mono on OSX

  - by Erik Karlsson

  Hello. Im developing a app in c# (winforms), which uses mono to run on osx. It contains some dynamic controls, for example a custom groupbox which contains some labels and textboxes, a button etc. these boxes can both be added and removed dynamically. Problem arises both when they are created, and removed, or even when a messagebox is shown. What happens is that sometimes on rendering white boxes appears, or some labels are not drawn correctly. And sometimes when a messagebox appears, it first opens up like 5 dummies which are just blank, and which you cant close. Am i doing something wrong, should i sleep the gui thread a bit after each creation, or should i invalidate stuff on my own? Or should i try GTK#? Many thanks on input on this, Erik

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• jQuery Tips and Tricks

  - by roosteronacid

  Miscellaneous Creating an HTML Element and keeping a reference, Checking if an element exists, Writing your own selectors by Andreas Grech The data function - bind data to elements by TenebrousX The noConflict function - Freeing up the $ variable by Oli Check the index of an element in a collection by redsquare The jQuery metadata plug-in by kRON Live event handlers by TM Isolate the $ variable in noConflict mode by nickf Replace anonymous functions with named functions by ken Microsoft AJAX framework and jQuery bridge by Slace jQuery tutorials by egyamado Remove elements from a collection and preserve chainability by roosteronacid Declare $this at the beginning of anonymous functions by Ben FireBug lite, Hotbox plug-in, tell when an image has been loaded and Google CDN by Colour Blend Judicious use of third-party jQuery scripts by harriyott The each function by Jan Zich Form Extensions plug-in by Chris S Syntax No-conflict mode by roosteronacid Shorthand for the ready-event by roosteronacid Line breaks and chainability by roosteronacid Nesting filters by Nathan Long Cache a collection and execute commands on the same line by roosteronacid Contains selector by roosteronacid [Defining properties at element creation][26] by roosteronacid Optimization Optimize performance of complex selectors by roosteronacid The context parameter by lupefiasco Save and reuse searches by Nathan Long

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