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• Navigation bar's buttons tint color sometimes not set

  - by Felipe

  Refer to the following, short video: http://screencast.com/t/cmnsqVTh The problem is with the color of a navigation bar's back button. The first time I load the app, the navigation bar + its buttons have the default color. I then push a view controller on the stack, and when the new view loads (in the viewDidLoad method), it sets the navigation bar's tint color to pink. The nav bar's buttons are also pink as expected. I then press the back button, and the view is popped from the stack. On the root view controller's viewWillAppear method I set the tint color back to nil so that it's the default color again. The navigation bar looks as expected. However if I push the view controller on the stack yet again, the navigation bar's tint color is pink, but the back button's color is the default light blue. Hope that was understandable. So what's the cause of the problem?

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• Jquery.form plugin and jquery.validation and it's submitHandler not working correctly... please help

  - by Matthew

  Hello guys, I was hoping someone can shed some light on what might be occurring on my page. Okay what I currently have on my page is a simple form that collects first name, last name, city, state and email. Once submitted it will hit a PHP page that updates our DB and echo's back to the designted div with a class of .response. I am using jquery.validation and placing that dynamic function within the submitHandler like so: submitHandler: function(form) { $(form).ajaxSubmit({ target: '.response', // target element(s) to be updated with server response resetForm: true, success: function() { $('#commentform').hide(); $('.response').show(); } }); So what I am getting is a div that is not being populated with the echo from my php file in FF and in IE I am getting the message of thank you but the page is taking me to the update.php script in which I have the form action pointing to. I am not sure what I am missing... Thanks, Matt

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• Generating a Call Hierarchy for dynamicly invoked method

  - by Maxim Veksler

  Hello, Today's world of dynamic invoke, reflection and runtime injection just doesn't play well with traditional tools such as ctags, doxygen and CDOC. I am searching for a method call hierarchy visualization tool that can display both static and dynamic method invocations. It should be easy to use, light during execution and provide helpful detailed information about the recorded runtime session. Now I guess Callgrind could be considered a valid solution for the family C. What tool / technique could you suggest to create a call graph for both static and dynamic method invocation for JVM based bytecode? The intended end result is a graphical display (preferably interactive) which can show path from main() to each method that was invoked. During research for this post I stumbled upon javashot, it seems that this is the kind of approach I'm aiming at, I would prefer that this would be integrated into a kind of profiler or alike which than can be used from within my IDE (Eclipse, IntelliJ, Netbeans and alike). Thank you, Maxim.

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• How to get the same UITableViewCell layout as in the Address Book app?

  - by Romain

  Hi, I currently have a custom UITableViewCell which contains a few labels, and an image. The "main" label is used to display people's names. Currently, I'm styling it in bold text. What I'd like to do (to gain some space and readability), is to mimic the Address Book app cell style, that is: first name in light text, and family name in bold text. Is there a way to do this using the same UILabel? Or, should I use 2 different UILabels? How should I layout them, without knowing their sizes? Thanks in advance for your assistance!

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• Synchronize DataGrid and DataForm in Silverlight 3

  - by SpiralGray

  I've been banging my head against the wall for a couple of days on this and it's time to ask for help. I've got a DataGrid and DataForm on the same UserControl. I'm using an MVVM approach so there is a single ViewModel for the UserControl. That ViewModel has a couple of properties that are relevant to this discussion: public ObservableCollection<VehicleViewModel> Vehicles { get; private set; } public VehicleViewModel SelectedVehicle { get { return selectedVehicle; } private set { selectedVehicle = value; OnPropertyChanged( "SelectedVehicle" ); } } In the XAML I've got the DataGrid and DataForm defined as follows: <data:DataGrid SelectionMode="Single" ItemsSource="{Binding Vehicles}" SelectedItem="{Binding SelectedVehicle, Mode=TwoWay}" AutoGenerateColumns="False" IsReadOnly="True"> <dataFormToolkit:DataForm CurrentItem="{Binding SelectedVehicle}" /> So as the SelectedItem changes on the DataGrid it should push that change back to the ViewModel and when the ViewModel raises the OnPropertyChanged the DataForm should refresh itself with the information for the newly-selected VehicleViewModel. However, the setter for SelectedVehicle is never being called and in the Output window of VS I'm seeing the following error: System.Windows.Data Error: ConvertBack cannot convert value 'xxxx.ViewModel.VehicleViewModel' (type 'xxxx.ViewModel.VehicleViewModel'). BindingExpression: Path='SelectedVehicle' DataItem='xxxx.ViewModel.MainViewModel' (HashCode=31664161); target element is 'System.Windows.Controls.DataGrid' (Name=''); target property is 'SelectedItem' (type 'System.Object').. System.MethodAccessException: xxxx.ViewModel.MainViewModel.set_SelectedVehicle(xxxx.ViewModel.VehicleViewModel) It sounds like it's having a problem converting from a VehicleViewModel to an object (or back again), but I'm confused as to why that would be (or even if I'm on the right track with that assumption). Each row/item in the DataGrid should be a VehicleViewModel (because the ItemsSource is bound to an ObservableCollection of that type), so when the SelectedItem changes it should be dealing with an instance of VehicleViewModel. Any insight would be appreciated.

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• insert or update on table violates foreign key constraint

  - by sprasad12

  Hi, I have two tables entitytype and project. Here are the create table statements: Create table project ( pname varchar(20) not null, primary key(pname) ); create table entitytype( entityname varchar(20) not null, toppos char(100), leftpos char(100), pname varchar(20) not null, primary key(entityname), foreign key(pname) references project(pname) on delete cascade on update cascade ); Now when i try to insert any values into entitytype table i am getting the following error: ERROR: insert or update on table "entitytype" violates foreign key constraint "entitytype_pname_fkey" Detail: Key (pname)=(494) is not present in table "project". Can someone please shed some light on what i am doing wrong. Any input will be of great help. Thank you.

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• Javascript Back Button - Stop the initial load of back button from working

  - by Evan

  Hi, I'm using a javascript back button link and forward button link to control the user's history inside a modal/lightbox window. The challenge I have is when the modal window is launched, and the "back" and "forward" buttons are present for the user to click, if the initial javascript back button is clicked when the window opens, it actually closes the modal window, because the javascript history is taking the user back to the page PRIOR to the opening of modal window. So, in essence, I'm trying to disable the "back" button from working on the initial load of the modal/light box. <a href="javascript:history.go(-1)">Back Button</a> <a href="javascript:history.go(1)">Foward Button</a> Is this possible?

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• Is it safe to spin on a volatile variable in user-mode threads?

  - by yongsun

  I'm not quite sure if it's safe to spin on a volatile variable in user-mode threads, to implement a light-weight spin_lock, I looked at the tbb source code, tbb_machine.h:170, //! Spin WHILE the value of the variable is equal to a given value /** T and U should be comparable types. */ template<typename T, typename U> void spin_wait_while_eq( const volatile T& location, U value ) { atomic_backoff backoff; while( location==value ) backoff.pause(); } And there is no fences in atomic_backoff class as I can see. While from other user-mode spin_lock implementation, most of them use CAS (Compare and Swap).

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• files build execution order

  - by Mahesh

  Hi, I have a data structure which is as given below: class File { public string Value { get; set; } public File[] Dependencies { get; set; } public bool Change { get; private set; } public File(string value,File[] dependencies) { Value = value; Dependencies = dependencies; Change = false; } } Basically, this data structure follows a typical build execution of files. Each File has a value and a list of dependencies which is again of type File. Every file is exposed with a property called Change which tells whether the file is changed or not. I brainstormed to form a algorithm which goes through all these files and build in an order( i.e typical build process ) but haven't got a better algorithm. Can anyone throw some light on this? Thanks a lot. Mahesh

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• Input validation in WPF

  - by irfanali-wpfexpert

  i am developing an application in wpf using MVVM design pattern. i have a listbox when an item is slected then a dialog is open having the same record in editable mode. this dialog is binded with the selected item of the list. i have apply the validation rule for textbox using IDataErrorInfo. when the user update a record on dialogbox then at every key press, the selected record in listbox is also changed. if the user press save button then i submit changes to database. but if user click cancel button then i do not submit changes to database but the list box is updated with the current updation in GUI. when i refresh the list then old value appears again. My requirement is to update the listbox only when the user hit the save button but not on every key press on dialog box. I first fill the generic list with the linq to sql classes then bind the listbox with it. Please let me know what i have to do. Thanks in advance

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• How to create widget with clickable text in QT/PyQt?

  - by serge

  Hi everyone, i'm trying to realize non-editable QTableView with widgets in cells that should contain clickable listed text. With following code i'm setting widget in definite cell: view = QTableView() label = QLabel( <some html text> ) ... view.setIndexWidget(index, label) I used html to make label's text clickable, but links became blue with underline and moreover by clicking on it with right mouse button appears popup menu with "Copy Link Locaion" option, where i wanted to place some hidden information instead of url and of course do not let user see this info. I'm looking for light-weight widget, i thought that insertion of QGraphicsView in each cell will lead to big computer loads, but can't think of any other solution. Can you advice what should i use for this purpose? Thank you in advance Serge

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• realtime collaborative editing: mobwrite on windows7 x64

  - by collabwriter

  I have set up Mobwrite on my Win7 development machine using the daemon and q.py listener. The client test suite passes, but when I run the server test suite, everything fails with this sort of response: Question: U:user10259538167863824 f:0:unittest10259538167863824 R:0:Hello world Expected: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Actual: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Diff: u:user10259538167863824 ¶ F:0:unittest10259538167863824 ¶ D:0:=11¶ ¶ ¶ I am assuming it has something to do with line endings, but I don't know what to do. Can anyone shed some light on this? Thanks so much! PS: I'm running Python 2.7

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• How Moles Isolation framework is implemented?

  - by Buu Nguyen

  Moles is an isolation framework created by Microsoft. A cool feature of Moles is that it can "mock" static/non-virtual methods and sealed classes (which is not possible with frameworks like Moq). Below is the quick demonstration of what Moles can do: Assert.AreNotEqual(new DateTime(2012, 1, 1), DateTime.Now); // MDateTime is part of Moles; the below will "override" DateTime.Now's behavior MDateTime.NowGet = () => new DateTime(2012, 1, 1); Assert.AreEqual(new DateTime(2012, 1, 1), DateTime.Now); Seems like Moles is able to modify the CIL body of things like DateTime.Now at runtime. Since Moles isn't open-source, I'm curious to know which mechanism Moles uses in order to modify methods' CIL at runtime. Can anyone shed any light?

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• Rails fields_for :child_index option explanation

  - by Timothy

  I have been trying to create a complex form with many nested models, and make it dynamic. Now I found that making a nested model isn't difficult with accepts_nested_attributes_for, but making it nested and dynamic was seemingly impossible if there were multiple nested models. I came across http://github.com/ryanb/complex-form-examples/blob/master/app/helpers/application_helper.rb which does it very elegantly. Could anyone shed some light on lines 13 and 16? 13 form_builder.object.class.reflect_on_association(method).klass.new and 16 form_builder.fields_for(method, options[:object], :child_index => "new_#{method}") do |f| From intuition, line 13 instantiates a new object, but why must it do so many method calls? I couldn't find any documentation for the :child_index option on line 16. When the form is created, a very large number is used as an index for new models, whereas existing models are indexed by their id. How does this work?

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• When are ASP.NET Expression Builders most useful?

  - by SkippyFire

  I saw an example of using Expression Builders, and creating your own Custom Expression Builder Classes here: http://aspnet.4guysfromrolla.com/articles/022509-1.aspx However, I fail to see the value in using this approach. It doesn't seem much easier than programmatically setting values in your code behind. As far as I can tell, the only thing you can do with them is set properties. Maybe they would be useful for setting defaults on certain controls? Can anyone shed light on where this ASP.NET feature becomes powerful?

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• NSDateFormatter incorrect date on simulator, correct date on device

  - by Rudiger

  Hi, Im building a calendar and to find out the first day of the month I do [formatter setDateFormat:@"e"]; int startDay = [[formatter stringFromDate:newDate] intValue]; On the device this works correctly and the 1st of the month is on the correct day. But on the simulator it is the day after. Although it doesn't overly matter about the simulator it is kind of driving me crazy thinking I've done something wrong. I tried to set the locale of the formatter but no difference, nor i think should it. Can anyone shed some light on this? On a side note is there a better way to build a calendar than this?

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• Artistic aspects of UI?

  - by anon

  Consider a single button. At one extreme, we have a black OpenGL window, with: outline (in white) of a rectangle bitmap remdered font inside of it, saying "Ok" At the other extreme, we have Mac OS X, a button that is: well rounded has some gradient showing light effects on it nice antialiased "OK" soft shadow of some sort These two UIs present very very different user experiences. The former says "This is from the 80s" the latter says "this is professional". This is something I do not understand well as a programmer (and don't know where to learn about this). Does anyone know of a good technical resource for this? [I'd prefer things that draws upon psychology / perception literature to say why to do something rather than design books that just says "use color XYZ with a gradient of blah"]

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• /analyze flag in Visual Studio 2010 Professional

  - by Martin

  Running Visual Studio 2008 Professional it is possible to enable static code analysis using the /analyze flag (even though this is not supported for the Professional version according to the documentation). In Visual Studio 2010 Professional this no longer works. Instead there is a default /analyze- flag added (one I can't find a GUI setting for). This does not work as well as the VS2008 version (or at all). Can anyone shed some light into this? What does the new /analyze- flag do and is there any way to enable the old analysis?

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• How to use exe in SharePoint on itemAdded?

  - by Justin Cullen

  I have a need to convert any document gets uploaded to Image. I downloaded the exe (with all the dlls) on my local machine (dont have to install) export.exe sourcefile.doc destinationfile.gif this syntax works from my local dos prompt. How do I use the same syntax "export.exe exampledoc.doc exampledoc.gif" when an item is added to sharepoint doc library. and Do I need to put the folder (where the exe and dlls are for this) in the sharepoint frontend server so it's accessible? If yes, where should this folder reside? Does the folder and files need sharepoint service account access? I am totally new and I would really like if someone can shed some light on this (step by step if possible)? Thanks Justin...

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• Is HTML5 the new buzzword? ( Web 2.0 was the old one )

  - by Atomiton

  Your thoughts on this? I'm hearing more and more people saying things like: "Is it html 5 compatible" "Can I make my website html 5" "Other html 5 question here..." What do you guys think? Is html5 the new buzzword? Obviously, it's more than a fad. It is the way things are going. But it seems like it's catching on in the mainstream. I don't think it will get as big as Web 2.0, mind you. Thought I'd ask a light question this Tuesday

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• Ruby CMS/blog: Mephisto vs. Radiant

  - by Candidasa

  I'm looking for a blogging tool with some light CMS features in Ruby on Rails. I mainly want something simple, but configurable. I have no need for page snippets, etc. Just your basic main blog, very good (and easy) theme support, some nice sidebar stuff, a few static pages and MetaWeblog API support. I'm thinking of either using Mephisto or Radiant CMS (everything else seems half-baked or extremely lightweight at best): http://mephistoblog.com/ http://www.radiantcms.org/ Documentation for Mephisto seems very lacking and their site is a mess. I've also read some bad things about it's stability. Radiant seems more stable in comparison and has heaps of useful plug-ins. However, it isn't designed for blogging out of the box. That has to be added as almost an after thought. Creating a custom theme also seems more cumbersome with Radiant due to the sub-page/snippet feature. Which should I choose?

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• iPhone landscape navigation back action shows vertical view transition?

  - by Code Shogun

  I have a regular UINavigationController and I push a series of UIViewController into the stack. The view transition for push controller is horizontal animation transition: [self.navigationController pushViewController:controller animated:YES]; However, when I press the Back button on the navigation bar, the view transition animation is vertical (vertically dropping down the previous controller/view). I don't seem to find any way to make this horizontal. This happens only in Landscape mode. Portrait mode the transition all happens as horizontal flip transition. Can anyone shed any light on this? Thanks

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• Isn't INT more efficient than UNIQUEIDENTIFIER?

  - by ck

  I have a parent table and child table where the columns that join them together are the UNIQUEIDENTIFIER type. The child table has a clustered index on the column that joins it to the parent table (its PK, which is also clustered). I have created a copy of both of these tables but changed the relationship columns to be INTs instead, have rebuilt the indexes so that they are essentially the same structure and can be queried in the same way. When I query for a known 20 records from the parent table, pulling in all the related records from the child tables, I get identical query costs across both, i.e. 50/50 cost for the batches. If this is true, then my giant project to change all of the tables like this appears to be pointless, other than speeding up inserts. Can anyone provide any light on the situation?

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• Insert new relationship data in core data

  - by michael

  Hoping someone can shed some light on what I might be doing wrong here. Trying to add an "event" to a list of events, represented by a one to many (inverse) relationship: MyEvents <--- Event This is the code: MyEvents *myEvents = (MyEvents *)[NSEntityDescription insertNewObjectForEntityForName:@"MyEvents" inManagedObjectContext:context]; NSLog(@"MYEVENTS: %@", myEvents); NSLog(@"EVENT: %@", event); [myEvents addEventObject:event]; My context is fine, and both the myEvents and event print perfectly valid information. When I try to add the event that I have (which is passed into this view controller, having been retrieved from core data previously) with this code [myEvents addEventObject:event]; It falls over with *** -[NSComparisonPredicate evaluateWithObject:]: message sent to deallocated instance MyEvents and Event are just the default generated code. MyEvents contains only the relationship to event. Thanks.

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• Css editor with certain features

  - by user255408

  I need a light css editor with certain functions. Already downloaded and tried a few apps but still no luck, none of them fit my requirements. Actually, there is one, CssEdit (or TextMate), but unfortunately i'm a windows user... Already tried: built-in NetBeans IDE css editor (btw nice editor, the one i'm using now for css) IntelJ IDE (very good html and css editor, but using the entire ide just for this - that's crazy) ArduoCss (very buggy in win7 environment) Notepad Notepad++ (it rules, but as i said, i need something more functional for css editing) Style Master ( if i don't find anything else, probably i'll choose this one) Stylizer ( also might be my choice, but it's black interface kills me, also extremy noob-oriented, i even couldn't find a way to see the source code) Some of the features i am looking for: grouping by comments like here snippets autocomplete, if i type for instance f-s, it should recognize and expand it to "font-size" property color picker The editor must have at least the first feature that i listed above. Sorry for my poor english.

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