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• Firefox 23 bêta : partage et navigation simplifiés, le navigateur adopte un nouveau logo pour « une nouvelle ère »

  Firefox 23 bêta : partage et navigation simplifiée le navigateur adopte un nouveau logo pour « une nouvelle ère »Le développement de Firefox 23 se poursuit avec une nouvelle version bêta disponible en téléchargement depuis le site officiel de l'éditeur du navigateur. Quels sont les changements apportés par cette nouvelle version ? D'entrée de jeu, on peut déjà remarquer que le logo de Firefox a subi quelques petits changements. Sur la page officielle, on peut lire le slogan : « Un nouveau logo pour une nouvelle ère » Côté sécurité, une nouvelle fonctionnalité voit le jour. « Mixed content blocking...

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• Universal navigation menu across domains - would it be considered duplicate content?

  - by Jon Harley

  Across different sites on different second-level domains exists a universal navigation bar with a collection of roughly 30 links. This universal bar is exactly the same for every page on each domain. The bar's HTML, CSS and JavaScript are all stored in a subfolder for each domain and the HTML is embedded upon serving the page and is not being injected on the client side. None of the links use any rel directives and are as vanilla as can be. My question is about Google's duplicate content rule. Would something like this be considered duplicate content? Matt Cutt's blog post about duplicate content mentions boilerplate repetition, but then he mentions lengthy legalese. Since the text in this universal bar is brief and uses common terms, I wonder if this same rule applies. If this is considered duplicate content, what would be a good way to correct the problem?

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• autostart app with tag in awm

  - by nonsenz

  while giving awm a try i encounter some problems. i want to autostart some apps when awm is started with specific tags. here's the relevant config i use for that. first my tags with layouts: tags = { names = {"mail", "www", "video", "files", 5, 6, 7, 8, 9}, layout = {layouts[11], layouts[11], layouts[11], layouts[11], layouts[1], layouts[1], layouts[1], layouts[1], layouts[1]} } for s = 1, screen.count() do -- Each screen has its own tag table. tags[s] = awful.tag(tags.names, s, tags.layout) end now the app-autostart stuff: awful.util.spawn("chromium-browser") awful.util.spawn("firefox") awful.util.spawn("vlc") awful.util.spawn_with_shell("xterm -name files -e mc") awful.util.spawn_with_shell("xterm -name 5term") awful.util.spawn_with_shell("xterm -name 5term") awful.util.spawn_with_shell("xterm -name 5term") awful.util.spawn_with_shell("xterm -name 5term") awful.util.spawn_with_shell("xfce4-power-manager") i use xterm with the -name param to give them custom classes (for custom tags via rules). and now some rules to connect apps with tags: awful.rules.rules = { -- All clients will match this rule. { rule = { }, properties = { border_width = beautiful.border_width, border_color = beautiful.border_normal, focus = true, keys = clientkeys, buttons = clientbuttons } }, { rule = { class = "MPlayer" }, properties = { floating = true } }, { rule = { class = "pinentry" }, properties = { floating = true } }, { rule = { class = "gimp" }, properties = { floating = true } }, -- Set Firefox to always map on tags number 2 of screen 1. -- { rule = { class = "Firefox" }, -- properties = { tag = tags[1][2] } }, { rule = { class = "Firefox" }, properties = { tag = tags[1][2] } }, { rule = { class = "Chromium-browser" }, properties = { tag = tags[1][1] } }, { rule = { class = "Vlc"}, properties = { tag = tags[1][3] } }, { rule = { class = "files"}, properties = { tag = tags[1][4] } }, { rule = { class = "5term"}, properties = { tag = tags[1][5] } }, } it works for chromium, firefox and vlc but not for the xterms with the "-name" param. when i check the xterms after they started with xprop i can see: WM_CLASS(STRING) = "5term", "XTerm" i think that sould work, but the xterms are placed on the first workspace/tag.

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• Why can we delete some built-in properties of global object?

  - by demix

  I'm reading es5 these days and find that [[configurable]] attribute in some built-in properties of global object is set to true which means we can delete these properties. For example: the join method of Array.prototype object have attributes {[[Writable]]:true, [[Enumerable]]: false, [[Configurable]]: true} So we can easily delete the join method for Array like: delete Array.prototype.join; alert([1,2,3].join); The alert will display undefined in my chromium 17,firefox 9 ,ie 10,even ie6; In Chrome 15 & safari 5.1.1 the [[configurable]] attribute is set to true and delete result is also true but the final result is still function(){[native code]}. Seems like this is a bug and chromium fix it. I haven't notice that before. In my opinion, delete built-in functions in user's code is dangerous, and will bring out so many bugs when working with others.So why ECMAScript make this decision?

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• How far should an entity take care of its properties values by itself?

  - by Kharlos Dominguez

  Let's consider the following example of a class, which is an entity that I'm using through Entity Framework. - InvoiceHeader - BilledAmount (property, decimal) - PaidAmount (property, decimal) - Balance (property, decimal) I'm trying to find the best approach to keep Balance updated, based on the values of the two other properties (BilledAmount and PaidAmount). I'm torn between two practices here: Updating the balance amount every time BilledAmount and PaidAmount are updated (through their setters) Having a UpdateBalance() method that the callers would run on the object when appropriate. I am aware that I can just calculate the Balance in its getter. However, it isn't really possible because this is an entity field that needs to be saved back to the database, where it has an actual column, and where the calculated amount should be persisted to. My other worry about the automatically updating approach is that the calculated values might be a little bit different from what was originally saved to the database, due to rounding values (an older version of the software, was using floats, but now decimals). So, loading, let's say 2000 entities from the database could change their status and make the ORM believe that they have changed and be persisted back to the database the next time the SaveChanges() method is called on the context. It would trigger a mass of updates that I am not really interested in, or could cause problems, if the calculation methods changed (the entities fetched would lose their old values to be replaced by freshly recalculated ones, simply by being loaded). Then, let's take the example even further. Each invoice has some related invoice details, which also have BilledAmount, PaidAmount and Balance (I'm simplifying my actual business case for the sake of the example, so let's assume the customer can pay each item of the invoice separately rather than as a whole). If we consider the entity should take care of itself, any change of the child details should cause the Invoice totals to change as well. In a fully automated approach, a simple implementation would be looping through each detail of the invoice to recalculate the header totals, every time one the property changes. It probably would be fine for just a record, but if a lot of entities were fetched at once, it could create a significant overhead, as it would perform this process every time a new invoice detail record is fetched. Possibly worse, if the details are not already loaded, it could cause the ORM to lazy-load them, just to recalculate the balances. So far, I went with the Update() method-way, mainly for the reasons I explained above, but I wonder if it was right. I'm noticing I have to keep calling these methods quite often and at different places in my code and it is potential source of bugs. It also has a detrimental effect on data-binding because when the properties of the detail or header changes, the other properties are left out of date and the method has no way to be called. What is the recommended approach in this case?

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• Les tests d'interopérabilités sur HTTP 2.0 bientôt amorcés, la navigation internet sera plus rapide grâce au multiplexage

  Les tests d'interopérabilités sur HTTP 2.0 bientôt amorcés, la navigation internet sera plus rapide grâce au multiplexageLe web est susceptible de changer fondamentalement bientôt. L'IETF (Internet Engineering Task Force) prépare la version 2.0 du protocole HTTP, a expliqué Mark Nottingham qui dirige actuellement l'équipe d'IETF HTTPBIS. Pour sa première ébauche, HTTP 2.0 s'appuiera sur SPDY, le protocole développé par Google. Le responsable de l'équipe de travail prévoit toutefois des changements significatifs. Parmi eux, un nouvel algorithme de compression d'en-tête. Il faut aussi noter que bien que SPDY n'autorise que les connexions chiffrées, pour HTTP 2.0 elles seront facultatives. HTTP 2.0...

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• I have a new file type that I would like to handle in gnome how to get file properties?

  - by Mark

  I have a new file type that I would like to handle in gnome. Establishing a new mime type, a new thumbnailer and a new application to display the file type is done. But I need a new tab on the file properties page. This tab is analogous to the tabs for exif information for jpg files or for encoding information for video codecs, that says how long the video is. The files concerned are embroidery files and the file properties needed to be displayed are things like phisical dimentions of the design, how much thread will be used and how many colours. My belief is that with current gnome 3 this is not possible, am I right? Or should I take a wider view that in Ubuntu, anything is possible, just may be a bit difficult?

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• Java JPA Hibernate Spring @EntityListeners throws org.springframework.dao.DataIntegrityViolationException

  - by user

  I am using Spring 3 with Hibernate 3. I would like to update the last modification date automatically when an entity is updated. Below is the sample code: HibernateConfig: @Configuration public class HibernateConfig { @Bean public DataSource dataSource() throws Exception { DriverManagerDataSource dataSource = new DriverManagerDataSource(); Properties properties = new Properties(); properties.load(ClassLoader.getSystemResourceAsStream(new String("hibernate.properties"))); dataSource.setUrl(properties.getProperty(new String("jdbc.url"))); dataSource.setUsername(properties.getProperty(new String("jdbc.username"))); dataSource.setPassword(properties.getProperty(new String("jdbc.password"))); dataSource.setDriverClassName(properties.getProperty(new String("jdbc.driverClassName"))); return dataSource; } @Bean public AnnotationSessionFactoryBean sessionFactory() throws Exception { AnnotationSessionFactoryBean sessionFactory = new AnnotationSessionFactoryBean(); Properties hibernateProperties = new Properties(); Properties properties = new Properties(); properties.load(ClassLoader.getSystemResourceAsStream(new String("hibernate.properties"))); // set the Hibernate Properties hibernateProperties.setProperty(new String("hibernate.dialect"), properties.getProperty(new String("hibernate.dialect"))); hibernateProperties.setProperty(new String("hibernate.show_sql"), properties.getProperty(new String("hibernate.show_sql"))); hibernateProperties.setProperty(new String("hibernate.hbm2ddl.auto"), properties.getProperty(new String("hibernate.hbm2ddl.auto"))); sessionFactory.setDataSource(dataSource()); sessionFactory.setHibernateProperties(hibernateProperties); sessionFactory.setAnnotatedClasses(new Class[]{Message.class}) return sessionFactory; } @Bean public HibernateTemplate hibernateTemplate() throws Exception { HibernateTemplate hibernateTemplate = new HibernateTemplate(); hibernateTemplate.setSessionFactory(sessionFactory().getObject()); return hibernateTemplate; } } DAOConfig: @Configuration public class DAOConfig { @Autowired private HibernateConfig hibernateConfig; @Bean public MessageDAO messageDAO() throws Exception { MessageDAO messageDAO = new MessageHibernateDAO(hibernateConfig.hibernateTemplate()); return messageDAO; } } Message: import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.EntityListeners; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity @Table @EntityListeners(value = MessageListener.class) public class Message implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column private int id; @Column(nullable = false) @Temporal(TemporalType.TIMESTAMP) private Date lastMod; public Message() { } public int getId() { return id; } public void setId(int id) { this.id = id; } public Date getLastMod() { return lastMod; } public void setLastMod(Date lastMod) { this.lastMod = lastMod; } } MessageListener: import java.util.Date; import javax.persistence.PrePersist; import javax.persistence.PreUpdate; import org.springframework.stereotype.Component; @Component public class MessageListener { @PrePersist @PreUpdate public void setLastMod(Message message) { message.setLastMod(new Date()); } } When running this the MessageListener is not being invoked. I use a DAO design pattern and when calling dao.update(Message) it throws the following Exception: org.springframework.dao.DataIntegrityViolationException: not-null property references a null or transient value: com.persistence.entities.MessageStatus.lastMod; nested exception is org.hibernate.PropertyValueException: not-null property references a null or transient value: com.persistence.entities.Message.lastMod at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:665) at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412) at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411) at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374) at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:683) at com.persistence.dao.hibernate.GenericHibernateDAO.save(GenericHibernateDAO.java:38) Having looked at a number of websites there seems not to be a solution.

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• How to load a properties file put in the classpath from a JSP?

  - by PSP

  I have a properties file which I have put in the classpath and I am trying to load it from a JSP: InputStream stream = application.getResourceAsStream("/alert.properties"); Properties props = new Properties(); props.load(stream); But I am getting a FileNotFoundException.

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• Idea of an algorithm to detect a website's navigation structure?

  - by Uwe Keim

  Currently I am in the process of developing an importer of any existing, arbitrary (static) HTML website into the upcoming release of our CMS. While the downloading the files is solved successfully, I'm pulling my hair off when it comes to detect a site structure (pages and subpages) purely from the HTML files, without the user specifying additional hints. Basically I want to get a tree like: + Root page 1 + Child page 1 + Child page 2 + Child child page1 + Child page 3 + Root page 2 + Child page 4 + Root page 3 + ... I.e. I want to be able to detect the menu structure from the links inside the pages. This has not to be 100% accurate, but at least I want to achieve more than just a flat list. I thought of looking at multiple pages to see similar areas and identify these as menu areas and parse the links there, but after all I'm not that satisfied with this idea. My question: Can you imagine any algorithm when it comes to detecting such a structure? Update 1: What I'm looking for is not a web spider, but an algorithm do create a logical tree of the relationship of the pages to be able to create pages and subpages inside my CMS when importing them. Update 2: As of Robert's suggestion I'll solve this by starting at the root page, and then simply parse links as you go and treat every link inside a page simply as a child page. Probably I'll recurse not in a deep-first manner but rather in a breadth-first manner to get a more balanced navigation structure.

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• Why do I get a DependencyProperty.UnsetValue when converting a value in a MultiBinding?

  - by eskerber

  I have an extremely simple IMultiValueConverter that simply OR's two values. In the example below, I want to invert the first value using an equally simple boolean inverter. <MultiBinding Converter="{StaticResource multiBoolToVis}"> <Binding Path="ConditionA" Converter="{StaticResource boolInverter}"/> <Binding Path="ConditionB"/> </MultiBinding> public class BoolInverterConverter : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (value is bool) { return !((bool)value); } return null; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } #endregion } When I include the boolInverter, the first value in the MultiValueConverter becomes a "DependencyProperty.UnsetValue". There are no problems when I do not use the converter (other than not the logic I am aiming for, of course). Am I missing something? Stepping through the debugger shows that the InverseBoolConverter is properly inverting the value I pass it, but that value is then not being 'sent' to the MultiValueConverter.

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• C# - Recursive / Reflection Property Values

  - by tyndall

  What is the best way to go about this in C#? string propPath = "ShippingInfo.Address.Street"; I'll have a property path like the one above read from a mapping file. I need to be able to ask the Order object what the value of the code below will be. this.ShippingInfo.Address.Street Balancing performance with elegance. All object graph relationships should be one-to-one. Part 2: how hard would it be to add in the capability for it to grab the first one if its a List< or something like it.

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• How to do Selection Alignment using the RichTextBox in Silverlight 4?

  - by RoguePlanetoid

  I cannot seem to figure out how to do a Selection Alignment in the new RichTextBox, I have an idea that I need to convert the selection into the Paragraph type which supports alignment, but cannot seem to figure this out. None of the Silverlight examples have this, but I'm sure it is possible. I have this code, that does not work - as I think I need the selection to be a Paragraph as it always returns and Exception "Value does not fall within the expected range". Editor.Selection.SetPropertyValue(Paragraph.TextAlignmentProperty, TextAlignment.Left) I make sure I check for a Valid Selection first, code like the following works for "Bold": If Editor.Selection.Text.Length > 0 Then ' Text Selected If TypeOf Editor.Selection.GetPropertyValue(Run.FontWeightProperty) Is FontWeight _ AndAlso DirectCast(Editor.Selection.GetPropertyValue(Run.FontWeightProperty), FontWeight) = FontWeights.Normal Then Editor.Selection.SetPropertyValue(Run.FontWeightProperty, FontWeights.Bold) Else Editor.Selection.SetPropertyValue(Run.FontWeightProperty, FontWeights.Normal) End If End If Editor.Focus() Example in XAML: <Paragraph TextAlignment="Right">Example</Paragraph> The above works in the contents of a RichTextBox however I need to do this programatically based on a selection - like in WordPad.

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• Binding from View-Model to View-Model of a child User Control in Silverlight? 2 sources - 1 target..

  - by andrej351

  Hi there, So i have a UserControl for one of my Views and have another 'child' UserControl inside that. The outer 'parent' UserControl has a Collection on its View-Model and a Grid control on it to display a list of Items. I want to place another UserControl inside this UserControl to display a form representing the details of one Item. The outer / parent UserControl's View-Model already has a property on it to hold the currently selected Item and i would like to bind this to a DependancyProperty on the inner / child UserControl. I would then like to bind that DependancyProperty to a property on the child UserControl's View-Model. I can then set the DependancyProperty once in XAML with a binding expression and have the child UserControl do all its work in its View-Model like it should. The code i have looks like this.. Parent UserControl: <UserControl x:Class="ItemsListView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel}"> <!-- Grid Control here... --> <ItemDetailsView Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel.SelectedItem}" /> </UserControl> Child UserControl: <UserControl x:Class="ItemDetailsView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel}" ItemDetailsView.Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel.Item, Mode=TwoWay}"> <!-- Form controls here... --> </UserControl> The selected Item is bound to the DependancyProperty fine. However from the DependancyProperty to the child View-Model does not. It appears to be a situation where there are two concurrent bindings which need to work but with the same target for two sources. Why won't the second (in the child UserControl) binding work?? Is there a way to acheive the behaviour I'm after?? Cheers.

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• TypeInitializeException on MVVM pattern

  - by Mohit Deshpande

  System.TypeInitializationException was unhandled Message=The type initializer for 'SmartHomeworkOrganizer.ViewModels.MainViewModel' threw an exception. Source=SmartHomeworkOrganizer TypeName=SmartHomeworkOrganizer.ViewModels.MainViewModel StackTrace: at SmartHomeworkOrganizer.ViewModels.MainViewModel..ctor() at SmartHomeworkOrganizer.App.OnStartup(Object sender, StartupEventArgs e) in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\App.xaml.cs:line 21 at System.Windows.Application.OnStartup(StartupEventArgs e) at System.Windows.Application.<.ctor>b__0(Object unused) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.DispatcherOperation.InvokeImpl() at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Windows.Threading.DispatcherOperation.Invoke() at System.Windows.Threading.Dispatcher.ProcessQueue() at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at SmartHomeworkOrganizer.App.Main() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\obj\Debug\App.g.cs:line 0 at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException: System.ArgumentException Message=Default value type does not match type of property 'Score'. Source=WindowsBase StackTrace: at System.Windows.DependencyProperty.ValidateDefaultValueCommon(Object defaultValue, Type propertyType, String propertyName, ValidateValueCallback validateValueCallback, Boolean checkThreadAffinity) at System.Windows.DependencyProperty.ValidateMetadataDefaultValue(PropertyMetadata defaultMetadata, Type propertyType, String propertyName, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.RegisterCommon(String name, Type propertyType, Type ownerType, PropertyMetadata defaultMetadata, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, PropertyMetadata typeMetadata, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, PropertyMetadata typeMetadata) at SmartHomeworkOrganizer.ViewModels.MainViewModel..cctor() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\ViewModels\MainViewModel.cs:line 72 InnerException: This bit of code throws a System.ArgumentException before the TypeInitializeException. It says: "Default value type does not match type of property Score": public static readonly DependencyProperty ScoreProperty = DependencyProperty.Register("Score", typeof(float), typeof(MainViewModel), new UIPropertyMetadata(0.0)); Here is the .NET property: public float Score { get { return (float) GetValue(ScoreProperty); } set { SetValue(ScoreProperty, value); } }

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• Problem using delegates, static, and dependencyproperties

  - by red-X

  I'm trying to animate a private variable named radius, which works. However while its changing I'm trying to execute a function which is getting to be quite of a problem. the code i have is below, it wont run because it has the following error An object reference is required for the non-static field, method, or property 'AppPart.SetChildrenPosition()' specifically new SetChildrenPositionDelegate(SetChildrenPosition) this part in this sentance part.Dispatcher.BeginInvoke(new SetChildrenPositionDelegate(SetChildrenPosition), new Object()); thnx to anyone able to help me. class AppPart : Shape { public string name { get; set; } public List<AppPart> parts { get; set; } private double radius { get { return (double)GetValue(radiusProperty); } set { SetValue(radiusProperty, value); } } public static readonly DependencyProperty radiusProperty = DependencyProperty.Register( "radius", typeof(double), typeof(AppPart), new PropertyMetadata( new PropertyChangedCallback(radiusChangedCallback))); private delegate void SetChildrenPositionDelegate(); private void SetChildrenPosition() { //do something with radius } private static void radiusChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e) { AppPart part = d as AppPart; part.Dispatcher.BeginInvoke(new SetChildrenPositionDelegate(SetChildrenPosition), new Object()); } private void AnimateRadius(double start, double end) { DoubleAnimation ani = new DoubleAnimation(); ani.From = start; ani.To = end; ani.FillBehavior = FillBehavior.HoldEnd; ani.Duration = new Duration(new TimeSpan(0, 0, 0, 3, 0)); ani.Completed += delegate { Console.WriteLine("ani ended"); }; this.BeginAnimation(AppPart.radiusProperty, ani); } }

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• Defining InputBindings within a Style

  - by Brent

  I'm creating a WPF app using the MVVM design pattern, and I'm trying to extend the TabItem control so that it closes the tab when the user clicks the middle mouse button. I'm trying to achieve this using InputBindings, and it works very well until I try to define it within a style. I've learned that you cannot add InputBindings to a style unless you attach it using a DependencyProperty. So I followed this similar post here... and it works... almost. I can close one tab using the middle mouse button, but it won't work on any of the other tabs (all of the tabs are added at runtime and inherit the same style). So I need some help. Why would this only be working the first time, and not after? Obviously I could create a custom control that inherits from a TabItem and make it work, but I'd like to figure this out as I can see this being expanded in my projects. I'm no expert on DependencyProperties, so please help me out. Thanks! Style: <Style TargetType="{x:Type TabItem}"> <Setter Property="w:Attach.InputBindings"> <Setter.Value> <InputBindingCollection> <MouseBinding MouseAction="MiddleClick" Command="{Binding CloseCommand}"/> </InputBindingCollection> </Setter.Value> </Setter> ... </Style> Class public class Attach { public static readonly DependencyProperty InputBindingsProperty = DependencyProperty.RegisterAttached("InputBindings", typeof(InputBindingCollection), typeof(Attach), new FrameworkPropertyMetadata(new InputBindingCollection(), (sender, e) => { var element = sender as UIElement; if (element == null) return; element.InputBindings.Clear(); element.InputBindings.AddRange((InputBindingCollection)e.NewValue); })); public static InputBindingCollection GetInputBindings(UIElement element) { return (InputBindingCollection)element.GetValue(InputBindingsProperty); } public static void SetInputBindings(UIElement element, InputBindingCollection inputBindings) { element.SetValue(InputBindingsProperty, inputBindings); } }

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• How to aggregate bindings in Silverlight UserControl

  - by Peter Wone

  Imagine a UserControl containing some sort of ItemsControl. The UserControl as a whole has a DataContext, but you also need to expose the ItemsSource of the ItemsControl. I have tried all manner of arrangements, and eventually passed a DomainDataSource as a UserControl dependency property named DDS, and bound the ItemsControl like this: ItemsSource="{Binding DDS.Data, ElementName=userControl}" It works, but this is mucky, and with Silverlight mucky is nearly always a sign of incorrect approach. Your advice is sought. It looks like multi-bindings might be the answer to this.

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• Change type of control by type

  - by Ruben

  Hi, I'm having following problem. I should convert a control to a certain type, this can be multiple types (for example a custom button or a custom label, ....) Here's an example of what i would like to do: private void ConvertToTypeAndUseCustomProperty(Control c) { Type type = c.getType(); ((type) c).CustomPropertieOfControl = 234567; } Thanks in advance.

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• Displaying FontFamily in Combobox

  - by Torsten

  Hi. My goal is to manipulate the text-styles of my application via DependencyProperties. I got a diagram in which the texts are to be manipulated in size, fontfamily, color, etc. So I'd like to use an interface similar to a rich text editor like Word. I'm using this code in my TextStyleVM http://shevaspace.blogspot.com/2006/12/i-have-some-fun-with-formattedtext_14.html So I have a FontFamilyProperty and a Getter and Setter for it: public static DependencyProperty FontFamilyProperty = DependencyProperty.Register( "FontFamily", typeof(FontFamily), typeof(OutlinedText), new FrameworkPropertyMetadata( SystemFonts.MessageFontFamily, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure), new ValidateValueCallback(IsValidFontFamily)); public FontFamily FontFamily { get { return (FontFamily)base.GetValue(FontFamilyProperty); } set { base.SetValue(FontFamilyProperty, value); } } Then there is a ToStyle method, which sets the style for the labels of the diagram, which are to be manipulated: Style style = new Style(); Binding fontFamilyBinding = new Binding("FontFamily"); fontFamilyBinding.Source = this; Setter fontFamilySetter = new Setter(); fontFamilySetter.Property = TextBlock.FontFamilyProperty; fontFamilySetter.Value = fontFamilyBinding; style.Setters.Add(fontFamilySetter); return style; Now this works for a TextBox. The textbox displays the current FontFamily, and if I enter a new, valid FontFamily like Arial into the textbox the FontFamily of the labels are changed. However, what I'd like to have is a combobox, which displays the SystemFonts and where I can choose one FontFamily for my labels. However, the binding doesn't seem to work. Neither the system fonts nor the current fonts of the labels are displayed. The combobox is just empty. This is my xaml: <r:RibbonLabel Content="FontFamily" /> <!--these do not work--> <r:RibbonComboBox SelectedItem="{Binding FontFamily}"/> <r:RibbonComboBox ItemsSource="{Binding FontFamily}"/> <!--this works--> <r:RibbonTextBox Text="{Binding FontFamily}"/> Now, I assume I have to set a different Setter for a ComboBox in the ToStyle Method. But I have no clue, which one. Maybe someting like this: fontFamilySetter.Property = ComboBox.ItemSource; However, if I set that Property, the TextBox still works. So is this the wrong place to start at? I'd also be grateful if someone could hint me to some documentation about using these Style-, Setter-, Binding-key-words, which are used in the ToStyle method, since this is somebody elses code I'm working with.

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• Move a legend in ggplot2

  - by Dan Goldstein

  I'm trying to create a ggplot2 plot with the legend beneath the plot. The ggplot2 book says on p 112 "The position and justification of legends are controlled by the theme setting legend.position, and the value can be right, left, top, bottom, none (no legend), or a numeric position". The following code works (since "right" it is the default), and it also works with "none" as the legend position, but "left", "top", "bottom", all fail with "Error in grid.Call.graphics("L_setviewport", pvp, TRUE) : Non-finite location and/or size for viewport" library(ggplot2) (myDat <- data.frame(cbind(VarX=10:1, VarY=runif(10)), Descrip=sample(LETTERS[1:3], 10, replace=TRUE))) qplot(VarX,VarY, data=myDat, shape=Descrip) + opts(legend.position="right") What am I doing wrong? Re-positioning a legend must be incredibly common, so I figure it's me.

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• How to move or position a legend in ggplot2

  - by Dan Goldstein

  I'm trying to create a ggplot2 plot with the legend beneath the plot. The ggplot2 book says on p 112 "The position and justification of legends are controlled by the theme setting legend.position, and the value can be right, left, top, bottom, none (no legend), or a numeric position". The following code works (since "right" it is the default), and it also works with "none" as the legend position, but "left", "top", "bottom", all fail with "Error in grid.Call.graphics("L_setviewport", pvp, TRUE) : Non-finite location and/or size for viewport" library(ggplot2) (myDat <- data.frame(cbind(VarX=10:1, VarY=runif(10)), Descrip=sample(LETTERS[1:3], 10, replace=TRUE))) qplot(VarX,VarY, data=myDat, shape=Descrip) + opts(legend.position="right") What am I doing wrong? Re-positioning a legend must be incredibly common, so I figure it's me.

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• How to ignore expired certificates from outside a Java application?

  - by Creepy Gnome

  We have a Java application that we need to ignore an expired self-signed cert, however we cannot modify the code to do this. I wondering if there was a System Property or environment variable that we could provide at start up that would allow us to have all expired cert's ignored for now, or even be more specific and provide externally the specific cert that we would like to have the expiration ignored. Anyone have any ideas that would work?

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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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• Difference between Property and Method

  - by Asim Sajjad

  Which one is better to use when it come to return value for example public int EmployeeAge { get{return intEmployeeAge}; } And public int EmployeeAge() { return intEmployeeAge; } Which one is better and why? And what is best programming practice to use when we have secnario like above ?

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