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  • Can you manually add to an iPhone/iPad Navigation Bar a back button item?

    - by MikeN
    I have a reference to a "UIBarButtonItem", is there a way I can add a custom "Back Navigation Button" to that item when it is not part of a Navigation based view? I can add a left button: UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Custom Back" style:UIBarButtonItemStylePlain target:self action:@selector(backAction:)]; menuItem.backBarButtonItem = backButton; //This doesn't seem to work. menuItem.popOverNavigationItem.leftBarButtonItem = backButton; //This shows a normal button So how could I make the leftmost button look like a back navigation button?

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  • ASP.NET MVC2: Can you get ModelMetadata.ContainerType from within a collection?

    - by CodeSponge
    I'm trying to call DisplayFor and DisplayForModel to iterate an IEnumerable< with various element types from within a view. I have Templates defined for each element/Model type. What I would like to do is check the ViewData.ModelMetadata.ContainerType from within the Template so that Template can determine if it was called as part of a collection. A simple example: Index1.aspx: To render a collection of Foos. <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Foo>>" %> <asp:Content ContentPlaceHolderID="MainPlaceHolder" runat="server"> <ul><%:Html.DisplayForModel()%></ul> </asp:Content> Index2.aspx: To render a Foo. <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Foo>" %> <asp:Content ContentPlaceHolderID="MainPlaceHolder" runat="server"> <%:Html.DisplayForModel()%> </asp:Content> Shared\DisplayTemplates\Foo.ascx: A context aware Template for Foo. <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Foo>" %> <% var tag = typeof(IEnumerable).IsAssignableFrom(ViewData.ModelMetaData.ContainerType) ? "li" : "div"; %> <<%:tag%>><%:Model.Name%></<%:tag%>> The problem with this example is that ViewData.ModelMetaData.ContainerType is null in the Template when resolved though Index1.aspx. From what I've read on Brad Wilson post and others it has to do with the use of IEnumerable and its being an interface. Is there a way to insure that the ContainerType is set? Perhaps by creating a ModelMetadataProviders? I looked into that breifly but it appears the ContainerType value is determined before and then passed to the Provider. Any suggestions would be appreciated.

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  • Most efficient algorithm for merging sorted IEnumerable<T>

    - by franck
    Hello, I have several huge sorted enumerable sequences that I want to merge. Theses lists are manipulated as IEnumerable but are already sorted. Since input lists are sorted, it should be possible to merge them in one trip, without re-sorting anything. I would like to keep the defered execution behavior. I tried to write a naive algorithm which do that (see below). However, it looks pretty ugly and I'm sure it can be optimized. It may exist a more academical algorithm... IEnumerable<T> MergeOrderedLists<T, TOrder>(IEnumerable<IEnumerable<T>> orderedlists, Func<T, TOrder> orderBy) { var enumerators = orderedlists.ToDictionary(l => l.GetEnumerator(), l => default(T)); IEnumerator<T> tag = null; var firstRun = true; while (true) { var toRemove = new List<IEnumerator<T>>(); var toAdd = new List<KeyValuePair<IEnumerator<T>, T>>(); foreach (var pair in enumerators.Where(pair => firstRun || tag == pair.Key)) { if (pair.Key.MoveNext()) toAdd.Add(pair); else toRemove.Add(pair.Key); } foreach (var enumerator in toRemove) enumerators.Remove(enumerator); foreach (var pair in toAdd) enumerators[pair.Key] = pair.Key.Current; if (enumerators.Count == 0) yield break; var min = enumerators.OrderBy(t => orderBy(t.Value)).FirstOrDefault(); tag = min.Key; yield return min.Value; firstRun = false; } } The method can be used like that: // Person lists are already sorted by age MergeOrderedLists(orderedList, p => p.Age); assuming the following Person class exists somewhere: public class Person { public int Age { get; set; } } Duplicates should be conserved, we don't care about their order in the new sequence. Do you see any obvious optimization I could use?

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  • CALayer drawInContext vs addSublayer

    - by Michael
    How can I use both of these in the same UIView correctly? I have one custom subclassed CALayer in which I draw a pattern within drawInContext I have a another in which I set an overlay PNG image as the contents. I have a third which is just a background. How do I overlay all 3 of these items? [self.layer addSublayer:bottomLayer]; // this line is the problem [squaresLayer drawInContext:viewContext]; [self.layer addSublayer:imgLayer]; The other 2 by themselves draw correctly if I do them in that order. No matter where I try and put bottomLayer, it always prevents squaresLayer from drawing. The reason I need 3 layers is I intend to animate the colors in the background and custom layers. The top layer is just a graphical overlay.

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  • log4net versus TraceSource

    - by Paul Stovell
    In this thread many people have indicated that they use log4net. I am a fan of TraceSources and would like to know why log4net is used. Here is why I like trace sources: Pluggable listeners - XML, TextFile, Console, EventLog, roll your own Customisable trace switches (error, warning, info, verbose, start, end, custom) Customisable configuration The Logging Application Block is just a big set of TraceListeners Correlation of activities/scopes (e.g., associate all logs within an ASP.NET request with a given customer The Service Trace Viewer allows you to visualize events against these activities individually All of it is configurable in app.config/web.config. Since the .NET framework internally uses TraceSources, it also gives me a consistent way of configuring tracing - with log4net, I have to configure log4net as well as TraceSources. What does log4net give me that TraceSources don't (or that couldn't be done by writing a couple of custom TraceListeners)?

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  • Wrapping variable width text in emacs lisp

    - by Jonathan Arkell
    I am hacking up a tagging application for emacs. I have got a tag cloud/weighted list successfully displaying on a buffer, but i am running into a snag. I need to be able to properly word-wrap the buffer, but I haven't a clue where to start. The font I am using is a variable width font. On top of that, each tag is going to be in a different size, depending on how many times it shows up on the buffer. Finally, the window that displays the tagcloud could be in a window that is 200 pixels wide, or the full screen width. I really have no idea where to start. I tried longlines mode on the tagcloud buffer, but that didn't work. Source code is at: http://emacswiki.org/cgi-bin/emacs/free-tagging.el

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  • Loading a ConfigurationSection with a required child ConfigurationElement with .Net configuration fr

    - by Vadim Rybak
    I have a console application that is trying to load a CustomConfigurationSection from a web.config file. The custom configuration section has a custom configuration element that is required. This means that when I load the config section, I expect to see an exception if that config element is not present in the config. The problem is that the .NET framework seems to be completely ignoring the isRequired attribute. So when I load the config section, I just creates an instance of the custom configuration element and sets it on the config section. My question is, why is this happening? I want the GetSection() method to fire a ConfigurationErrors exception since a required element is missing from the configuration. Here is how my config section looks. public class MyConfigSection : ConfigurationSection { [ConfigurationProperty("MyConfigElement", IsRequired = true)] public MyConfigElement MyElement { get { return (MyConfigElement) this["MyConfigElement"]; } } } public class MyConfigElement : ConfigurationElement { [ConfigurationProperty("MyAttribute", IsRequired = true)] public string MyAttribute { get { return this["MyAttribute"].ToString(); } } } Here is how I load the config section. class Program { public static Configuration OpenConfigFile(string configPath) { var configFile = new FileInfo(configPath); var vdm = new VirtualDirectoryMapping(configFile.DirectoryName, true, configFile.Name); var wcfm = new WebConfigurationFileMap(); wcfm.VirtualDirectories.Add("/", vdm); return WebConfigurationManager.OpenMappedWebConfiguration(wcfm, "/"); } static void Main(string[] args) { try{ string path = @"C:\Users\vrybak\Desktop\Web.config"; var configManager = OpenConfigFile(path); var configSection = configManager.GetSection("MyConfigSection") as MyConfigSection; MyConfigElement elem = configSection.MyElement; } catch (ConfigurationErrorsException ex){ Console.WriteLine(ex.ToString()); } } Here is what my config file looks like. <?xml version="1.0"?> <configuration> <configSections> <section name="MyConfigSection" type="configurationFrameworkTestHarness.MyConfigSection, configurationFrameworkTestHarness" /> </configSections> <MyConfigSection> </MyConfigSection> The wierd part is that if I open the config file and load the section 2 times in a row, I will get the exception that I expect. var configManager = OpenConfigFile(path); var configSection = configManager.GetSection("MyConfigSection") as MyConfigSection; configManager = OpenConfigFile(path); configSection = configManager.GetSection("MyConfigSection") as MyConfigSection; If I use the code above, then the exception will fire and tell me that MyConfigElement is required. The question is Why is it not throwing this exception the first time??

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  • How to get the PrintDocumentImageableArea for a given PrintQueue without going through PrintDialog?

    - by Patrick Klug
    From MSDN (link): The type PrintDocumentImageableArea has no public constructor. Hence, the variable documentImageableArea must be declared and assigned to Nothing and only then passed to the method. This method displays a PrintDialog requiring input from the user. After the user has selected a printer, paper size, and orientation and closed the dialog, documentImageableArea points to an actual object and its properties are initialized. I have my custom print dialog and need to get the PrintDocumentImageableArea of a given PrintQueue and PrintTicket! (I need the margin's I need to apply) From what I can gather it is quite common for anything but the most basic applications to use their own custom print dialog. There must be a way to get to this information!? Any input appreciated!

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  • touchesEnded not being called??? or randomly being called

    - by Rob
    If I lift my finger up off the first touch, then it will recognize the next touch just fine. It's only when I hold my first touch down continuously and then try and touch a different area with a different finger at the same time. It will then incorrectly register that second touch as being from the first touch again. Update It has something to do with touchesEnded not being called until the very LAST touch has ended (it doesn't care if you already had 5 other touches end before you finally let go of the last one... it calls them all to end once the very last touch ends) - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch* touch = [touches anyObject]; NSString* filename = [listOfStuff objectAtIndex:[touch view].tag]; // do something with the filename now } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { ITouch* touch = [touches anyObject]; NSString* buttonPressed = [listOfStuff objectAtIndex:[touch view].tag]; // do something with this info now }

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  • How to troubleshoot deallocation of object in uitableview?

    - by 4thSpace
    I have a table view with tall cells. About 300 in height. The cells are custom and have an associated nib. In cellForRowAtIndexPath, I access an object in an array using indexPath.row. The object has properties, which I assign to labels on the custom cell. This works fine for the first two cells. Once I scroll enough for the third cell to get created, the app crashes. I have NSZombieEnabled set and here is the output: 2010-04-19 21:48:13.360 MyApp[54463:207] *** -[CALayer release]: message sent to deallocated instance 0xfc4e50 (gdb) continue 2010-04-19 21:48:18.382 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement methodSignatureForSelector: -- trouble ahead 2010-04-19 21:48:18.383 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement doesNotRecognizeSelector: -- abort (gdb) continue Program received signal: “EXC_BAD_ACCESS”. (gdb) I'm not sure what is deallocated. How can I trace this to the source?

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  • WPF dependency property setter not firing when PropertyChanged is fired, but source value is not cha

    - by Sandor Davidhazi
    I have an int dependency property on my custom Textbox, which holds a backing value. It is bound to an int? property on the DataContext. If I raise the PropertyChanged event in my DataContext, and the source property's value is not changed (stays null), then the dependency property's setter is not fired. This is a problem, because I want to update the custom Textbox (clear the text) on PropertyChanged, even if the source property stays the same. However, I didn't find any binding option that does what I want (there is an UpdateSourceTrigger property, but I want to update the target here, not the source). Maybe there is a better way to inform the Textbox that it needs to clear its text, I'm open to any suggestions.

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  • Maintain combobox selected item across TabNavigator Tabs

    - by camcim
    Hi guys, I've just recently started out using Flash Builder and have a question surrounding states. In fact I'm not entirely sure it is related to states but read on and I hope it will become clearer. I currently have a custom component that contains 3 comboboxes. This resides in a TabNavigator component. The TabNavigator consits of 5 pages (Tabs). The custom container holding the comboboxes should display the same selected data across all Tabs. ie. If I am in Tab1 and select an item from one of the comboboxes then click on Tab2 I need to mirror the combobox's selection in Tab2. Can anyone offer me suggestions on how to best tackle this? Di I need to set a global variable?

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  • jquery: how to find an element which is comming 2 elements before current element

    - by erkan
    Hi guys... i have a markup which look like this: <h3>Paragraf3-dummytext</h3> <p> <a name="paragraf3"> Quisque id odio. Praesent venenatis metus at tortor pulvinar varius. Lorem ipsum dolor sit </a> </p> what i want to do is to find all 'a' tags with 'name' attribute and find the 'h3' tag for that anchor; im trying to do it like this: var paragraf = []; var paragrafheading = []; $('a[name]').each(function() { paragraf.push($(this).attr('name')); paragrafheading.push($(this).prev().text()); but it does not work becouse there is a 'p' tag around the text. Any suggestions would be appreciated. Thanks

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  • How to disable Center Key (CK) and let only Left Soft Key (LSK) be used in j2me

    - by awaghad-ashish
    Hello everyone, I created a custom item in which I need to use the Center Key for the purpose of selecting and I am successfully able to use it with the keyPressed event using the keyCode as -5. The problem is, as soon as I press the CK, it also clicks on the command above the LSK and that causes the menu to pop up. Is there any way that I can disable the CK for a particular command or something like that (because I dont need CK, since I can click on the command through LSK as well, I want to use the CK specifically for the custom item)? Any kind of help will be appreciated, Thanks and regards, Ashish.

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  • Eclipse plugin: content assist working in Galileo, not Ganymede

    - by erwan
    Hi, I am writing a custom editor in a plugin, and I developed it in Galileo. Now I'm trying to run it in Ganymede, but content assist doesn't work. There is no error, just nothing happens when I type "ctrl+space". The way I'm doing it is by providing a custom Configuration class that extends SourceViewerConfiguration, overriding public IContentAssistant getContentAssistant(ISourceViewer sourceViewer). The method gets called when the editor is created but there is no content assist. Was there any change from Ganymede to Galileo that I should be aware of?

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  • How to create migration in subdirectory with Rails?

    - by Adrian Serafin
    Hi! I'm writing SaaS model application. My application database consist of two logic parts: application tables - such as user, roles... user defined tables (he can generate them from ui level) that can be different for each application instance All tables are created by rails migrations mechanism. I would like to put user defined tables in another directory: db/migrations - application tables db/migrations/custom - tables generated by user so i can do svn:ignore on db/migrations/custom, and when I do updates of my app on clients servers it would only update application tables migrations. Is there any way to achieve this in rails?

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  • How to organized page specific CSS link tags with spark view pages and application.spark

    - by dbr
    I'm currently using ASP.NET MVC 2 and the spark view engine. The main master page (application.spark) contains all of the CSS link tags that need to be present for all pages (global stuff). However, I have some content pages that have page specific CSS tags and currently I'm just sticking the link tag in the body as something like: <content name="MainContent"> <!-- page specific csss --> <link rel="stylesheet" href="/Content/css/page_specific.css" /> My problem is that when the page renders, this tag ends up in the which is not where it needs to be. Is there a solution for this? One idea I had was to check the controller in the Application.spark page and write out which page specific css file is required for that particular controller, however, that solution doesn't seem to scale well and I would imagine there is some way of creating the link in the child page and having it render where it's supposed to by the browser.

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  • ie8 playing funny with list-style-position: inside

    - by Lee
    Ok, So problem here... when using list-style-position:inside in IE8 the first like is indented but every line after that is not. So the new lines appear under the bullet. This is fine, but when I use a list with that css applied with an a tag within the li then the text automatically gets pushed to the second line, and the first line is empty. When I remove the a tag from the li then it jumps back up. Any idea on why this might be or is this a bug in the ie8 world or do I just need to double check my css? Any insights would be much appreciated.

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  • MVC ActionLink generating NON-Restul URL AFTER adding constraints

    - by brianstewey
    Hello I have a custom route that without constraints generates a Restful URL with an ActionLink. Route - routes.MapRoute( "Blog", // Route name "Blog/{d}/{m}/{y}", // URL with parameters, new { controller = "Blog", action = "Retrieve" } Generates - http://localhost:2875/Blog/12/1/2010 From - <%=Html.ActionLink("Blog Entry - 12/01/2010", "Retrieve", "Blog", new { d = 12, m = 01, y = 2010 }, null)%> If I add constraints like so. routes.MapRoute( "Blog", // Route name "Blog/{d}/{m}/{y}", // URL with parameters, new { controller = "Blog", action = "Retrieve" }, new { d = @"\d{2}", m = @"\d{2}", y = @"\d{4}" } It generates - http://localhost:2875/Blog/Retrieve?d=12&m=1&y=2010 Extra information: it is added before the custom route. Any ideas? Cheers

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  • Looking for a reporting tool that will allow vector graphics in output file (PDF)

    - by Richard West
    I have been tasked with evaluating our current system that we use for creating and outputing reports. Currently we are using Crystal Reports ver 8, (I know that this is and old version.), which has a custom commandline app that we wrote in C# to execute the report for a given parameter passed through the command line. We like Crystal becuase it's easy to setup and design the report. It's also easy to print and create a PDF file from crystal using our custom commandline program. One of the problems/complaints that we have is that Crystal does does not appear to have a method that will allow us to create a PDF file with a vector images, such as our company logo. Crystal Reports always converts an image into a bitmap. When the PDF is printed, the results are less than flattering, and the PDF file size is increased. Does anyone have any recomendadtions for a reporting product that we should consider?

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  • PHP encoding with DOMDocument

    - by Olivier Lalonde
    <tag> ????? ? </tag> When I try to get the content of the following code using DOMDocument functions, it returns something like: ÐÐ»ÐµÐºÑ Ðœ I've tried setting DOMDocument encoding to different values (UTF-8, ISO-8859-1), using mb_convert_encoding, iconv and utf8_encode but without success. How can I get "????? ?" instead of "ÐÐ»ÐµÐºÑ Ðœ" ? EDIT: The input is coming from a page loaded with curl. When I output the page content to my browser, the characters are displayed correctly (so I doubt the input is the problem).

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  • Is it possible to disable a ScrollViewer from inside the ScrollViewer?

    - by gehho
    From a UserControl, I would like to disable a ScrollViewer which is defined one level higher. My scenario looks something like this: <!-- ... --> <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled"> <custom:MyUserControl ... /> </ScrollViewer> Now, I would like to disable the ScrollViewer from within MyUserControl. Is this possible? Background: I have defined a custom TabControl style where I added a ScrollViewer for each item's content automatically. However, in one case, I do not want to use that ScrollViewer, but rather make the content size to the available space, whereas in all other cases I do want to use the ScrollViewer. Any ideas? Of course, I could add a ScrollViewer to every tab item manually, except for the one item, but that is not what I want.

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  • SQL: Gather right hand values from a join

    - by Max Williams
    Let's say a question has many tags, via a join table called taggings. I do a join thus: SELECT DISTINCT `questions`.id FROM `questions` LEFT OUTER JOIN `taggings` ON `taggings`.taggable_id = `questions`.id LEFT OUTER JOIN `tags` ON `tags`.id = `taggings`.tag_id I want to order the results according to a particular tag name, eg 'piano', so that piano is at the top, then by all the other tags in alphabetical order. Currently i'm using this order clause: ORDER BY (tags.name = 'piano') desc, tags.name Which is going completely wrong - the first results i get back aren't even tagged with 'piano' at all. I think my problem is that i need to group the tag names somehow and do my ordering test against that: i think that doing it against the straight tags.name isn't working due to the structure of the resultant join table (it does work if i just do a simple select on the tags table) but i can't get my head around how to fix it. grateful for any advice, max

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