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• Problems with graphics of Sony Vaio Z

  - by dpcat237

  Hello, I have problem with my Sony Vaio Z VPCZ1. It has physical selector of GPUs which Linux kernel not detect. So after GRUB I see black display (I tried different distributions of Ubuntu and other Linux OS). I read in Ubuntu 10.10 was solve same problem with hybrid graphics but not in my case ^^ I found solutions (not easy at do) for oldest models. But I'm not expert in Linux and before I prefer ask people with more experience. Somebody can help me? Someone installed Ubuntu in same laptop? PS. for more information I found different webs: http://goo.gl/ktvq Thanks Regards

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• Is the “jQuery programming style” a kind of Reactive programming?

  - by Peter Krauss

  jQuery is a Javascript library and framework, but when we are programming with jQuery into DOM problems/solutions, we can practice a style quite different of programming... We can read about jQuery at Wikipedia, The set of jQuery core features — DOM element selections, traversal and manipulation —, enabled by its selector engine (...), created a new "programming style", fusing algorithms and DOM-data-structures This question is similar to the "subquestion-3" of this question but not so generic. The focus here is about this new kind of "programming style"... So, the question: Is the "jQuery programming style in DOM context" a new paradign? Or it is more one example of reactive programming (not "cell-oriented" but "DOM-node oriented") or another one? We have no "standard taxonomy of paradigms", so, please, in your answer, indicate also your "best choice for Wikipedia Paradign". Example: if you understand that "jQuery programming DOM" is like "awk filtering data", your choice can be event-driven.

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• Using your own gameloop logic on iphone?

  - by kkan

  I'm currently working on moving some android-ndk code to the iphone and have hit a wall. I'm new to iphone development, and from looking at some samples it seems that the main loop is handled for you and all you've got to do is override the render method on the view to handle the rendering and add a selector to handle the update methods. The render method itself lookslike it's attached to the windows refresh. But in android I've got my own game loop that controls the rendering and updates using c++ time.h. is it possible to implement the same here bypassing apple's loop? I'd really like the keep the structures of the code similar. Thanks!

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• scrapy cannot find div on this website [on hold]

  - by Jaspal Singh Rathour

  I am very new at this and have been trying to get my head around my first selector can somebody help? i am trying to extract data from page http://groceries.asda.com/asda-webstore/landing/home.shtml?cmpid=ahc--ghs-d1--asdacom-dsk-_-hp#/shelf/1215337195041/1/so_false all the info under div class = listing clearfix shelfListing but i cant seem to figure out how to format response.xpath(). I have managed to launch scrapy console but no matter what I type in response.xpath() i cant seem to select the right node. I know it works because when I type response.xpath('//div[@class="container"]') I get a response but don't know how to navigate to the listsing cleardix shelflisting. I am hoping that once i get this bit I can continue working my way through the spider. Thank you in advance! PS I wonder if it is not possible to scan this site - is it possible for the owners to block spiders?

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• Scrapy cannot find div on this website [on hold]

  - by Jaspal Singh Rathour

  I am very new at this and have been trying to get my head around my first selector can somebody help? i am trying to extract data from page http://groceries.asda.com/asda-webstore/landing/home.shtml?cmpid=ahc--ghs-d1--asdacom-dsk-_-hp#/shelf/1215337195041/1/so_false all the info under div class = listing clearfix shelfListing but i cant seem to figure out how to format response.xpath(). I have managed to launch scrapy console but no matter what I type in response.xpath() i cant seem to select the right node. I know it works because when I type response.xpath('//div[@class="container"]') I get a response but don't know how to navigate to the listsing cleardix shelflisting. I am hoping that once i get this bit I can continue working my way through the spider. Thank you in advance! PS I wonder if it is not possible to scan this site - is it possible for the owners to block spiders?

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• Byobu looks broken in Putty from Windows

  - by TheLQ

  After trying screen for 2 days I already hate it and am now trying byobu. However currently it looks very broken in Putty. I've already fixed the key mapping issue, but this issue isn't specified in the man page or even google: Notice the misplaced position of the list of windows, the broken selector position, the duplication of the last window, the random a in the top right, and the misplaced apply option. You can't see this, but the last option is not selectable. Is there some option in Putty I need to use in order to see this correctly?

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• ibus symbol disappears for Japanese language selection

  - by Christian Becker-Asano

  Similar to this post No ibus icon in Kubuntu, I have trouble with the ibus icon in Ubuntu 12.04. Each time an update is installed, the language selector for Japanese disappears from the top panel. I need to uninstall and install Japanese again, then reboot, to make the symbol appear again. In this thread No iBus icon in Kubuntu 12.04 the suggestion was to install the Japanese Version of Ubuntu, but is it really true that one has to stick to a special version of Ubuntu to get this problem solved? If so, how can I transfer the settings easily from the current version to the Japanese one?

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• Smooth animation in Cocos2d for iOS

  - by MrDatabase

  I move a simple CCSprite around the screen of an iOS device using this code: [self schedule:@selector(update:) interval:0.0167]; - (void) update:(ccTime) delta { CGPoint currPos = self.position; currPos.x += xVelocity; currPos.y += yVelocity; self.position = currPos; } This works however the animation is not smooth. How can I improve the smoothness of my animation? My scene is exceedingly simple (just has one full-screen CCSprite with a background image and a relatively small CCSprite that moves slowly). I've logged the ccTime delta and it's not consistent (it's almost always greater than my specified interval of 0.0167... sometimes up to a factor of 4x). I've considered tailoring the motion in the update method to the delta time (larger delta = larger movement etc). However given the simplicity of my scene it's seems there's a better way (and something basic that I'm probably missing).

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• obj-c classes and sub classes (Cocos2d) conversion

  - by Lewis

  Hi I'm using this version of cocos2d: https://github.com/krzysztofzablocki/CCNode-SFGestureRecognizers Which supports the UIGestureRecognizer within a CCLayer in a cocos2d scene like so: @interface HelloWorldLayer : CCLayer <UIGestureRecognizerDelegate> { } Now I want to make this custom gesture work within the scene, attaching it to a sprite in cocos2d: #import <Foundation/Foundation.h> #import <UIKit/UIGestureRecognizerSubclass.h> @protocol OneFingerRotationGestureRecognizerDelegate <NSObject> @optional - (void) rotation: (CGFloat) angle; - (void) finalAngle: (CGFloat) angle; @end @interface OneFingerRotationGestureRecognizer : UIGestureRecognizer { CGPoint midPoint; CGFloat innerRadius; CGFloat outerRadius; CGFloat cumulatedAngle; id <OneFingerRotationGestureRecognizerDelegate> target; } - (id) initWithMidPoint: (CGPoint) midPoint innerRadius: (CGFloat) innerRadius outerRadius: (CGFloat) outerRadius target: (id) target; - (void)reset; - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event; @end #include <math.h> #import "OneFingerRotationGestureRecognizer.h" @implementation OneFingerRotationGestureRecognizer // private helper functions CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2); CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB); - (id) initWithMidPoint: (CGPoint) _midPoint innerRadius: (CGFloat) _innerRadius outerRadius: (CGFloat) _outerRadius target: (id <OneFingerRotationGestureRecognizerDelegate>) _target { if ((self = [super initWithTarget: _target action: nil])) { midPoint = _midPoint; innerRadius = _innerRadius; outerRadius = _outerRadius; target = _target; } return self; } /** Calculates the distance between point1 and point 2. */ CGFloat distanceBetweenPoints(CGPoint point1, CGPoint point2) { CGFloat dx = point1.x - point2.x; CGFloat dy = point1.y - point2.y; return sqrt(dx*dx + dy*dy); } CGFloat angleBetweenLinesInDegrees(CGPoint beginLineA, CGPoint endLineA, CGPoint beginLineB, CGPoint endLineB) { CGFloat a = endLineA.x - beginLineA.x; CGFloat b = endLineA.y - beginLineA.y; CGFloat c = endLineB.x - beginLineB.x; CGFloat d = endLineB.y - beginLineB.y; CGFloat atanA = atan2(a, b); CGFloat atanB = atan2(c, d); // convert radiants to degrees return (atanA - atanB) * 180 / M_PI; } #pragma mark - UIGestureRecognizer implementation - (void)reset { [super reset]; cumulatedAngle = 0; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; if ([touches count] != 1) { self.state = UIGestureRecognizerStateFailed; return; } } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; if (self.state == UIGestureRecognizerStateFailed) return; CGPoint nowPoint = [[touches anyObject] locationInView: self.view]; CGPoint prevPoint = [[touches anyObject] previousLocationInView: self.view]; // make sure the new point is within the area CGFloat distance = distanceBetweenPoints(midPoint, nowPoint); if ( innerRadius <= distance && distance <= outerRadius) { // calculate rotation angle between two points CGFloat angle = angleBetweenLinesInDegrees(midPoint, prevPoint, midPoint, nowPoint); // fix value, if the 12 o'clock position is between prevPoint and nowPoint if (angle > 180) { angle -= 360; } else if (angle < -180) { angle += 360; } // sum up single steps cumulatedAngle += angle; // call delegate if ([target respondsToSelector: @selector(rotation:)]) { [target rotation:angle]; } } else { // finger moved outside the area self.state = UIGestureRecognizerStateFailed; } } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesEnded:touches withEvent:event]; if (self.state == UIGestureRecognizerStatePossible) { self.state = UIGestureRecognizerStateRecognized; if ([target respondsToSelector: @selector(finalAngle:)]) { [target finalAngle:cumulatedAngle]; } } else { self.state = UIGestureRecognizerStateFailed; } cumulatedAngle = 0; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesCancelled:touches withEvent:event]; self.state = UIGestureRecognizerStateFailed; cumulatedAngle = 0; } @end Header file for view controller: #import "OneFingerRotationGestureRecognizer.h" @interface OneFingerRotationGestureViewController : UIViewController <OneFingerRotationGestureRecognizerDelegate> @property (nonatomic, strong) IBOutlet UIImageView *image; @property (nonatomic, strong) IBOutlet UITextField *textDisplay; @end then this is in the .m file: gestureRecognizer = [[OneFingerRotationGestureRecognizer alloc] initWithMidPoint: midPoint innerRadius: outRadius / 3 outerRadius: outRadius target: self]; [self.view addGestureRecognizer: gestureRecognizer]; Now my question is, is it possible to add this custom gesture into the cocos2d project found on that github, and if so, what do I need to change in the OneFingerRotationGestureRecognizerDelegate to get it to work within cocos2d. Because at the minute it is setup in a standard iOS project and not a cocos2d project and I do not know enough about UIViews and classing/ sub classing in obj-c to get this to work. Also it seems to inherit from a UIView where cocos2d uses CCLayer. Kind regards, Lewis. I also realise I may have not included enough code from the custom gesture project for readers to interpret it fully, so the full project can be found here: https://github.com/melle/OneFingerRotationGestureDemo

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• Unable to fix broken packages with sudo apt-get install -f

  - by Bob

  Here's my result, of sudo apt-get install -f. i have Ran it twice and got negative result. I believe there is an error at "error in Version string '0:3.6.1-dates for language English Translation data updates for all supported packages for: English" This same statement "error in Version string, caused me three days of attempting to download version 12.04. There is a bug report concerning the quoted text as well. Is there anyway to download the version without the language packs, why would I corrupt version 11.10? Also, when attempting to download Synaptic using sudo apt-get install synaptic, I get the same error message. Again I point out the initial download problems and the same error message receipt. Thanks b0b@b0b-IC780M-A:~$ sudo apt-get install -f [sudo] password for b0b: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 298 not upgraded. b0b@b0b-IC780M-A:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 298 not upgraded. b0b@b0b-IC780M-A:~$ sudo apt-get upgrade install Reading package lists... Done Building dependency tree Reading state information... Done The following packages have been kept back: linux-headers-generic software-center The following packages will be upgraded: accountsservice acpi-support acpid aisleriot alsa-utils app-install-data-partner appmenu-qt apport apport-gtk apt-transport-https apt-utils aptdaemon aptdaemon-data apturl apturl-common banshee banshee-extension-soundmenu banshee-extension-ubuntuonemusicstore baobab bind9-host binutils bluez-alsa bluez-cups bluez-gstreamer brasero brasero-cdrkit brasero-common checkbox checkbox-gtk command-not-found command-not-found-data compiz compiz-core compiz-gnome compiz-plugins-default compiz-plugins-main-default cups cups-bsd cups-client cups-common cups-ppdc deja-dup desktop-file-utils dnsutils empathy empathy-common eog evince evince-common evolution-data-server evolution-data-server-common file-roller firefox firefox-globalmenu firefox-gnome-support gbrainy gcalctool gconf2 gconf2-common gedit gedit-common ghostscript ghostscript-cups ghostscript-x gir1.2-atspi-2.0 gir1.2-gconf-2.0 gir1.2-gnomebluetooth-1.0 gir1.2-gtk-3.0 gir1.2-gtksource-3.0 gir1.2-totem-1.0 gir1.2-unity-4.0 gir1.2-webkit-3.0 gnome-accessibility-themes gnome-bluetooth gnome-control-center gnome-control-center-data gnome-desktop3-data gnome-font-viewer gnome-games-common gnome-icon-theme gnome-mahjongg gnome-online-accounts gnome-orca gnome-power-manager gnome-screenshot gnome-search-tool gnome-session gnome-session-bin gnome-session-canberra gnome-session-common gnome-settings-daemon gnome-sudoku gnome-system-log gnome-system-monitor gnome-utils-common gnomine gstreamer0.10-gconf gstreamer0.10-plugins-good gstreamer0.10-pulseaudio gvfs gvfs-backends gvfs-bin gvfs-fuse gwibber gwibber-service gwibber-service-facebook gwibber-service-identica gwibber-service-twitter hpijs hplip hplip-cups hplip-data indicator-datetime indicator-session indicator-sound isc-dhcp-client isc-dhcp-common jockey-common jockey-gtk language-selector-common language-selector-gnome libaccountsservice0 libapt-inst1.3 libarchive1 libasound2-plugins libatk-adaptor libbind9-60 libbrasero-media3-1 libcamel-1.2-29 libcanberra-gtk-module libcanberra-gtk0 libcanberra-gtk3-0 libcanberra-gtk3-module libcanberra-pulse libcanberra0 libdecoration0 libdns69 libebackend-1.2-1 libebook1.2-12 libecal1.2-10 libedata-book-1.2-11 libedata-cal-1.2-13 libedataserver1.2-15 libedataserverui-3.0-1 libevince3-3 libgconf2-4 libgnome-bluetooth8 libgnome-control-center1 libgnome-desktop-3-2 libgoa-1.0-0 libgrip0 libgs9 libgs9-common libgtk-3-bin libgtksourceview-3.0-0 libgtksourceview-3.0-common libgweather-3-0 libgweather-common libgwibber-gtk2 libgwibber2 libhpmud0 libimobiledevice2 libisc62 libisccc60 libisccfg62 libjasper1 liblightdm-gobject-1-0 liblwres60 libmetacity-private0 libmission-control-plugins0 libmono-zeroconf1.0-cil libnautilus-extension1 libnm-glib-vpn1 libnm-glib4 libnm-util2 libnotify0.4-cil libnux-1.0-0 libnux-1.0-common libpam-gnome-keyring libreoffice-emailmerge libreoffice-style-human libsane-hpaio libsmbclient libsnmp-base libsnmp15 libsyncdaemon-1.0-1 libt1-5 libtotem0 libubuntuone-1.0-1 libubuntuone1.0-cil libunity-2d-private0 libunity-core-4.0-4 libunity6 libusbmuxd1 libwbclient0 libwebkitgtk-1.0-0 libwebkitgtk-1.0-common libwebkitgtk-3.0-0 libwebkitgtk-3.0-common libxml2 linux-generic linux-image-generic metacity metacity-common mobile-broadband-provider-info modemmanager mousetweaks multiarch-support nautilus nautilus-data nautilus-sendto-empathy network-manager nux-tools onboard openssl pulseaudio pulseaudio-esound-compat pulseaudio-module-bluetooth pulseaudio-module-gconf pulseaudio-module-x11 pulseaudio-utils python-apport python-aptdaemon python-aptdaemon-gtk python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets python-brlapi python-cups python-cupshelpers python-gobject-cairo python-httplib2 python-launchpadlib python-libxml2 python-pam python-papyon python-pkg-resources python-problem-report python-pyatspi2 python-software-properties python-ubuntuone-client python-ubuntuone-storageprotocol samba-common samba-common-bin seahorse shotwell simple-scan smbclient sni-qt software-properties-common software-properties-gtk sudo system-config-printer-common system-config-printer-gnome system-config-printer-udev telepathy-indicator telepathy-mission-control-5 thunderbird thunderbird-globalmenu thunderbird-gnome-support tomboy totem totem-common totem-mozilla totem-plugins ttf-opensymbol ubuntu-desktop ubuntu-minimal ubuntu-standard ubuntuone-client ubuntuone-client-gnome ubuntuone-couch unity unity-2d unity-2d-launcher unity-2d-panel unity-2d-places unity-2d-spread unity-common unity-lens-applications unity-services update-manager update-manager-core update-notifier update-notifier-common usbmuxd vim-common vim-tiny vinagre vino xorg xserver-xorg xserver-xorg-input-all xserver-xorg-video-all xserver-xorg-video-intel xserver-xorg-video-openchrome xul-ext-ubufox 296 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. Need to get 0 B/159 MB of archives. After this operation, 10.1 MB of additional disk space will be used. Do you want to continue [Y/n]? y Extracting templates from packages: 100% Preconfiguring packages ... dpkg: error: parsing file '/var/lib/dpkg/available' near line 4131 package 'python-zope.interface': error in Version string '0:3.6.1-dates for language English Translation data updates for all supported packages for: English . language-pack-en-base provides the bulk of translation data and is updated only seldom. This package provides frequent translation updates.': version string has embedded spaces E: Sub-process /usr/bin/dpkg returned an error code (2) b0b@b0b-IC780M-A:~$

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• Python response parse [migrated]

  - by Pavel Shevelyov

  When I'm sending some data on host: r = urllib2.Request(url, data = data, headers = headers) page = urllib2.urlopen(r) print page.read() I have something like this: [{"command":"settings","settings":{"basePath":"\/","ajaxPageState":{"theme":"spsr","theme_token":"kRHUhchUVpxAMYL8Y8IoyYIcX0cPrUstziAi8gSmMYk","css":[]},"ajax":{"edit-submit":{"callback":"spsr_calculator_form_ajax","wrapper":"calculator_form","method":"replaceWith","event":"mousedown","keypress":true,"url":"\/ru\/system\/ajax","submit":{"_triggering_element_name":"submit"}}}},"merge":true},{"command":"insert","method":null,"selector":null,"data":"\u003cdiv id=\"calculator_form\"\u003e\u003cform action=\"\/ru\/service\/calculator\" method=\"post\" id=\"spsr-calculator-form\" accept-charset=\"UTF-8\"\u003e\u003cdiv\u003e\u003cinput id=\"edit-from-ship-region-id\" type=\"hidden\" name=\"from_ship_region_id\" value=\"\" \/\u003e\n\u003cinput type=\"hidden\" name=\"form_build_id\" value=\"form-0RK_WFli4b2kUDTxpoqsGPp14B_0yf6Fz9x7UK-T3w8\" \/\u003e\n\u003cinput type=\"hidden\" name=\"form_id\" value=\"spsr_calculator_form\" \/\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bg_p\"\u003e \n\u0421\u0435\u0439\u0447\u0430\u0441 \u0412\u044b... bla bla bla but I want have something, like this: <html><h1>bla bla bla</h1></html> How can I do it?

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• Visual Tree Enumeration

  - by codingbloke

  I feel compelled to post this blog because I find I’m repeatedly posting this same code in silverlight and windows-phone-7 answers in Stackoverflow. One common task that we feel we need to do is burrow into the visual tree in a Silverlight or Windows Phone 7 application (actually more recently I found myself doing this in WPF as well).  This allows access to details that aren’t exposed directly by some controls.  A good example of this sort of requirement is found in the “Restoring exact scroll position of a listbox in Windows Phone 7”  question on stackoverflow.  This required that the scroll position of the scroll viewer internal to a listbox be accessed. A caveat One caveat here is that we should seriously challenge the need for this burrowing since it may indicate that there is a design problem.  Burrowing into the visual tree or indeed burrowing out to containing ancestors could represent significant coupling between module boundaries and that generally isn’t a good idea. Why isn’t this idea just not cast aside as a no-no?  Well the whole concept of a “Templated Control”, which are in extensive use in these applications, opens the coupling between the content of the visual tree and the internal code of a control.   For example, I can completely change the appearance and positioning of elements that make up a ComboBox.  The ComboBox control relies on specific template parts having set names of a specified type being present in my template.  Rightly or wrongly this does kind of give license to writing code that has similar coupling. Hasn’t this been done already? Yes it has.  There are number of blogs already out there with similar solutions.  In fact if you are using Silverlight toolkit the VisualTreeExtensions class already provides this feature.  However I prefer my specific code because of the simplicity principle I hold to.  Only write the minimum code necessary to give all the features needed.  In this case I add just two extension methods Ancestors and Descendents, note I don’t bother with “Get” or “Visual” prefixes.  Also I haven’t added Parent or Children methods nor additional “AndSelf” methods because all but Children is achievable with the addition of some other Linq methods.  I decided to give Descendents an additional overload for depth hence a depth of 1 is equivalent to Children but this overload is a little more flexible than simply Children. So here is the code:- VisualTreeEnumeration public static class VisualTreeEnumeration {     public static IEnumerable<DependencyObject> Descendents(this DependencyObject root, int depth)     {         int count = VisualTreeHelper.GetChildrenCount(root);         for (int i = 0; i < count; i++)         {             var child = VisualTreeHelper.GetChild(root, i);             yield return child;             if (depth > 0)             {                 foreach (var descendent in Descendents(child, --depth))                     yield return descendent;             }         }     }     public static IEnumerable<DependencyObject> Descendents(this DependencyObject root)     {         return Descendents(root, Int32.MaxValue);     }     public static IEnumerable<DependencyObject> Ancestors(this DependencyObject root)     {         DependencyObject current = VisualTreeHelper.GetParent(root);         while (current != null)         {             yield return current;             current = VisualTreeHelper.GetParent(current);         }     } }   Usage examples The following are some examples of how to combine the above extension methods with Linq to generate the other axis scenarios that tree traversal code might require. Missing Axis Scenarios var parent = control.Ancestors().Take(1).FirstOrDefault(); var children = control.Descendents(1); var previousSiblings = control.Ancestors().Take(1)     .SelectMany(p => p.Descendents(1).TakeWhile(c => c != control)); var followingSiblings = control.Ancestors().Take(1)     .SelectMany(p => p.Descendents(1).SkipWhile(c => c != control).Skip(1)); var ancestorsAndSelf = Enumerable.Repeat((DependencyObject)control, 1)     .Concat(control.Ancestors()); var descendentsAndSelf = Enumerable.Repeat((DependencyObject)control, 1)     .Concat(control.Descendents()); You might ask why I don’t just include these in the VisualTreeEnumerator.  I don’t on the principle of only including code that is actually needed.  If you find that one or more of the above  is needed in your code then go ahead and create additional methods.  One of the downsides to Extension methods is that they can make finding the method you actually want in intellisense harder. Here are some real world usage scenarios for these methods:- Real World Scenarios //Gets the internal scrollviewer of a ListBox ScrollViewer sv = someListBox.Descendents().OfType<ScrollViewer>().FirstOrDefault(); // Get all text boxes in current UserControl:- var textBoxes = this.Descendents().OfType<TextBox>(); // All UIElement direct children of the layout root grid:- var topLevelElements = LayoutRoot.Descendents(0).OfType<UIElement>(); // Find the containing `ListBoxItem` for a UIElement:- var container = elem.Ancestors().OfType<ListBoxItem>().FirstOrDefault(); // Seek a button with the name "PinkElephants" even if outside of the current Namescope:- var pinkElephantsButton = this.Descendents()     .OfType<Button>()     .FirstOrDefault(b => b.Name == "PinkElephants"); //Clear all checkboxes with the name "Selector" in a Treeview foreach (CheckBox checkBox in elem.Descendents()     .OfType<CheckBox>().Where(c => c.Name == "Selector")) {     checkBox.IsChecked = false; }   The last couple of examples above demonstrate a common requirement of finding controls that have a specific name.  FindName will often not find these controls because they exist in a different namescope. Hope you find this useful, if not I’m just glad to be able to link to this blog in future stackoverflow answers.

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• How should I design a wizard for generating requirements and documentation

  - by user1777663

  I'm currently working in an industry where extensive documentation is required, but the apps I'm writing are all pretty much cookie cutter at a high level. What I'd like to do is build an app that asks a series of questions regarding business rules and marketing requirements to generate a requirements spec. For example, there might be a question set that asks "Does the user need to enter their age?" and a follow-up question of "What is the minimum age requirement?" If the inputs are "yes" and "18", then this app will generate requirements that look something like this: "The registration form shall include an age selector" "The registration form shall throw an error if the selected age is less than 18" Later on down the line, I'd like to extend this to do additional things like generate test cases and even code, but the idea is the same: generate some output based on rules determined by answering a set of questions. Are there any patterns I could research to better design the architecture of such an application? Is this something that I should be modeling as a finite state machine?

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• Multi Column Block Too Narrow in Chrome

  - by aksarben

  My Web site displays song lyrics in a multi-column format, using CSS3. Both Firefox & MSIE 10+ display the multi-column text perfectly, but Chrome does not. This sample page shows the problem: http://www.hymntime.com/tch/test/html5/html5-multicolumn-test.htm The page uses a media selector, so your Chrome window must be at least 1280 pixels wide to see the effect. In fact, if you make the Chrome window less than 1280 pixels, you'll see the lyrics block change to a single column, of the same overall width. In other words, when Chrome shifts to 1-column to 2-column mode (due to the wider browser window), the lyrics block remains the same width, causing text to be squeezed together. Has anyone else seen this behavior, or know a solution? Is this a Chrome bug, or I am I doing something wrong? I posted this question on a Chrome forum a while back, but got no reply.

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• Cocos2d Box2d contact listener call different method in collided object

  - by roma86

  I have the building object, wen it hit with other, i want to call some method inside it. Building.mm -(void)printTest { NSLog(@"printTest method work correctly"); } in my ContactListener i trying to call it so: ContactListener.mm #import "ContactListener.h" #import "Building.h" void ContactListener::BeginContact(b2Contact* contact) { b2Body* bodyA = contact->GetFixtureA()->GetBody(); b2Body* bodyB = contact->GetFixtureB()->GetBody(); Building *buildA = (Building *)bodyA->GetUserData(); Building *buildB = (Building *)bodyB->GetUserData(); if (buildB.tag == 1) { NSLog(@"tag == 1"); } if (buildA.tag == 2) { NSLog(@"tag == 2"); [buildA printTest]; } } NSLog(@"tag == 2"); work correctly, but [buildA printTest]; get error Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CCSprite printTest]: unrecognized selector sent to instance 0x18595f0' Obviously I'm referring to the wrong object. How i can get different method and property in contacted objects from contactlistener class? Thanks.

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• How do I consolidate the differences between iOS and Android update loops?

  - by kkan

  I'm currently working on moving some Android-ndk code to the iPhone. From looking at some samples it seems that the main loop is handled for you and all you've got to do is override the render method on the view to handle the rendering. Then add a selector to handle the update methods. The render method itself looks like it's attached to the windows refresh. But in android I've got my own game loop that controls the rendering and updates using C++ time.h. Is it possible to implement the same here bypassing Apple's loop? I'd really like the keep the structures of the code similar.

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• Some menus are in Chinese/Japanese!

  - by harisibrahimkv

  Yesterday I shutdown my computer and today when I powered it on and logged in to 12.04, certain strings are in Japanese/Chinese (I don't know how to differentiate between the two). The strings are: Applications, places menu selector in my panel. Under 'places', the 'Home folder', 'Desktop', 'Computer'. The menus in VLC! Certain applications like 'sound converter', etc. How can I change everything back to English? I'm using Gnome classic in Ubuntu 12.04.

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• Html Element search in Firebug 13 !

  - by Anirudha

  Originally posted on: http://geekswithblogs.net/anirugu/archive/2013/10/26/html-element-search-in-firebug-13.aspxFirebug 13 are currently in development process. In firebug 13 you can search the element the way we do in CSS. This is much better and save time. Now just put your selector in search bar and now you are moving to your code.   In this picture I demo how I search a element of stackoverflow.com this is example of how this feature will work. If you want to use Firebug 13 then follow this blog post to get it https://blog.getfirebug.com/2013/10/25/firebug-1-13-alpha-4/

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• ProcessAjaxOpenIdResponse doesn't exist in OpenAuth library?

  - by Stacey

  Using the NerdDinner 2.0 source code, I was trying to emulate its use of OpenID. All was fine and good until I ran into this line of code.. ( seen in the source code at : http://nerddinner.codeplex.com/sourcecontrol/network/Show?projectName=nerddinner&changeSetId=46375#952606 ) - ( trunk/nerddinner/services/OpenIdRelyingPartyService.cs ) public ActionResult ProcessAjaxOpenIdResponse() { return relyingParty.ProcessAjaxOpenIdResponse().AsActionResult(); } ProcessAjaxOpenIdResponse doesn't exist, though! If I download the nerddinner application and follow the dependancies, I can see that the OpenAuth library they use has this method. However, getting the newest version from http://www.dotnetopenauth.net/ - the library does not have this method. Any ideas on what happened to it, and what I should use instead?

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• gem2rpm includes all dependencies instead of including only runtime dependencies

  - by prunio

  Version 0.6.0 of gem2rpm includes all (development and runtime) dependencies for a given Gem. Example: Rack Gem (http://rubygems.org/gems/rack) Version 1.1.0 has no runtime dependencies, but six development dependencies. Console output of gem2rpm --dependencies rack-1.0.1.gem is: rubygem(test-spec) = 0 rubygem(camping) = 0 rubygem(fcgi) = 0 rubygem(memcache-client) = 0 rubygem(mongrel) = 0 rubygem(ruby-openid) = 2.0.0 rubygem(thin) = 0` How can I specify to only include runtime dependencies? I have also opened a ticket on rubyforge.org, but there isn't a lot of activity on that tracker. Thank you for any hints.

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• Is there a format or service for resume/CV data?

  - by Ben Dauphinee

  I have noticed through the process of signing up for various freelance and job seeking or professional network sites that they all want your resume/CV data. And I am really getting tired of copy/pasting this data, especially since I have a website. Is there a standard format or service somewhere that I do not know about for this data? If not, does anyone want to help me build something like this out? I'm thinking a service similar to OpenID that allows you to maintain a central resume to have your data pulled from. No more filling in the same data over and over, and having to maintain the copies on any of the plethora of websites that have that data. Takers?

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• How to check misspelled email during user registration

  - by Nulldevice

  I use an email registration and confirmation in my project (yes, I know about OpenID. In my counry, a main email service lack it). Sometimes users misspell their email addresses. I know about this due to "message could not be delivered" letters in a mailbox. A misspelled address is absolutely correct, because I check it with a regular expression - say, [email protected] intstead of [email protected]. And I do not want to duplicate a email field in a registration form (who likes it?). Request processing routine cannot wait for email delivery - it could take an unpredictable time. So, my script will return to user a confirmation message "An email was sent". And the user will wait for it forever (of cause, not - he/she will turn to an alternative project with a more perfect registration system). Does someone knows how it can be improved (in any programming language)?

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• Dotnetopenauth oAuth Service provider explanation

  - by ria

  I am a total newbie in the oAuth area and have set up DotNetOpenAuth to set up an oAuth Service provider. The sample provided in the DotNetOpenAuth download is quite confusing for me...maybe cos i am new to this stuff. There is one default page that creates a database and populates the database. Now I browse to the login.aspx and it asks me to put an openid, actually I want to use DNN (which implements DotNetOpenAuth) and i want to use those credentials on another site which will be the oAuth consumer. Can someone explain how to test the oAuth Service provider in the samples of DotNetOpenAuth?

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• Why Shouldn't I Programmatically Submit Username/Password to Facebook/Twitter/Amazon/etc?

  - by viatropos

  I wish there was a central, fully customizable, open source, universal login system that allowed you to login and manage all of your online accounts (maybe there is?)... I just found RPXNow today after starting to build a Sinatra app to login to Google, Facebook, Twitter, Amazon, OpenID, and EventBrite, and it looks like it might save some time. But I keep wondering, not being an authentication guru, why couldn't I just have a sleek login page saying "Enter username and password, and check your login service", and then in the background either scrape the login page from say EventBrite and programmatically submit the form with Mechanize, or use an API if there was one? It would be so much cleaner and such a better user experience if they didn't have to go through popups and redirects and they could use any previously existing accounts. My question is: What are the reasons why I shouldn't do something like that? I don't know much about the serious details of cookies/sessions/security, so if you could be descriptive or point me to some helpful links that would be awesome. Thanks!

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• The Definitive Guide To Website Authentication (beta)

  - by Michiel de Mare

  Form Based Authentication For Websites Please help us create the definitive resource for this topic. We believe that stackoverflow should not just be a resource for very specific technical questions, but also for general guidelines on how to solve variations on common problems. "Form Based Authentication For Websites" should be a fine topic for such an experiment. It should include topics such as: how to log in how to remain logged in how to store passwords using secret questions forgotten password functionality OpenID "Remember me" checkbox Browser autocompletion of usernames and passwords secret urls (public urls protected by digest) checking password strength email validation and much more It should not include things like: roles and authorization http basic authentication Please help us by Suggesting subtopics Submitting good articles about this subject Editing the official answer (as soon as you have enough karma) UPDATE: See the terrific 7-part series by Jens Roland below.

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