George Birbilis' blog

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HowTo: load CaptionElements into Silverlight Media Framework player 03 Σεπτεμβρίου 12 03:38 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Trying to make CaptionsGridWindow of ClipFlair serve captions editing on-the-fly to SMF (Silverlight Media Framework [now called MMPPF]) player component, I had a real hard time, plagued by a bug at TimedTextElementStyle. It seems to be setting default FontSize for captions using a “Cell” unit instead of using a “Pixel” unit. Currently SMF only supports [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Bugs, Silverlight, ClipFlair, HowTo, Captioning, SMF, MMPPF, Multimedia
HowTo: Scale control arround its center using a render transform 15 Αυγούστου 12 07:02 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: In the context of ClipFlair development, I was recently adding independent scaling (zooming) functionality to its ZUI container’s floating windows (apart from the container zooming functionality) and came across some strange behavior, where the windows seemed to also move apart from getting scaled. After banging my head a bit I decided to take a closer [...]

Δημοσίευση στην κατηγορία: .NET, Transforms, UI, Posts, WPF, Silverlight, ClipFlair, ZUI, HowTo, Scaling
HowTo: Bind to a DataContext property named Source in XAML 14 Αυγούστου 12 03:27 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: While refactoring ClipFlair code to use MVVM (Model-View-ViewModel) pattern, I came across the XAML error “Object reference not set to an instance of an object.”, shown in Visual Studio when trying to bind to my ViewModel (accessed implicitly, being set as the DataContext of the XAML control) for a property named Source. I have settled [...]

Δημοσίευση στην κατηγορία: .NET, Posts, WPF, Silverlight, XAML, ClipFlair, HowTo, Image, Properties, MVVM, Binding, Source
Single statement ScaleTransform initialization in both WPF and SL 11 Αυγούστου 12 06:32 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: With Silverlight using a cut-down .NET API, some decisions have been at least ackward, causing Silverlight code to be sometimes unnecesserily more complex than its WPF counterpart and WPF code needing several changes to get ported for Silverlight. In ClipFlair I’ve implemented a WPFCompatibility layer to ease compiling WPF code for Silverlight (and vice-versa too) [...]

Δημοσίευση στην κατηγορία: Posts, Compatibility, WPF, Silverlight, ClipFlair, Extensions, Constructors, ScaleTransform
Gotcha: Silverlight DependencyProperty metadata: 0d not 0 for double 09 Αυγούστου 12 11:38 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Just came accross a runtime error message that troubled me a bit to resolve while adding Prezi-like content scaling functionality in ClipFlair‘s FloatingWindowHostZUI (ZUI = Zoomable User Interface) container. I had added the following: /// Identifies the <see cref="FloatingWindow.Scale" /> dependency property. /// </summary> /// <value> /// The identifier for the <see cref="FloatingWindow.Scale" /> dependency [...]

Δημοσίευση στην κατηγορία: .NET, Posts, WPF, Silverlight, XAML, ClipFlair, ZUI, Gotcha, Runtime, DependencyProperty, XAMLParseException, PropertyMetadata
HowTo: Compress speech audio using CSpeex codec at Silverlight apps 04 Αυγούστου 12 07:15 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Following up on my post on how to fix CSpeex (http://cspeex.codeplex.com) to compile at Silverlight 5 (see http://zoomicon.wordpress.com/2012/06/09/fix-compile-cspeex-audio-codec-at-silverlight-4-rc-and-silverlight-5/). Initially I thought it was not working correctly, but then I noticed I was running it on Terminal Server and didn’t have an audio device available. Running SLAudioDemo included in the CSpeex distribution (after doing the fix [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Silverlight, ClipFlair, Codec, Speex, Audio, HowTo, Compression
Gotcha: Silverlight’s Uri class constructor eats up part after last slash 22 Ιουλίου 12 10:54 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Via trial and error, I recently found out that when creating a Uri combining another Uri and a suffix part (tried at Silverlight, but I guess it’s a .NET issue in general), it eats up the last part of the (first) Uri if it doesn’t end with "/". That is, if you combine http://test.com/a with [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Silverlight, ClipFlair, Uri, Workarround, Gotcha, URL
Fix: The tag ‘TimeUpDown’ does not exist in XML namespace (Silverlight Toolkit) 14 Ιουλίου 12 07:59 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: If you use TimeUpDown control from Silverlight Toolkit in your XAML like below (copy pasting from CaptionGrid at ClipFlair source): <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <DataTemplate x:Key="StartTimeCellTemplate"> <TextBlock Margin="4" Text="{Binding Begin}" /> </DataTemplate> <DataTemplate x:Key="StartTimeCellEditTemplate">  <input:TimeUpDown Format="hh:mm:ss" Value="{Binding Begin, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=true}" /> </DataTemplate> … </ResourceDictionary> [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Silverlight, XAML, Errors, Fix, ClipFlair, Controls, DLL, Reference, TimeUpDown, Toolkit
Set default document for IIS via web.config at Silverlight Web project 13 Ιουλίου 12 04:29 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: When you tell the Visual Studio IDE to generate a web project (instead of just using an autogenerated page) for a Silverlight project, it creates a project named SilverlightAppName.Web with a SilverlightAppNameTestPage.aspx (ASP.net) and an SilverlightAppNameTestPage.html. Either one can be served from a web server (obviously the .aspx one from IIS or any web server [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Silverlight, Web, Launch, HTTP, ClipFlair, IIS, Configuration
How to crash Visual Studio 2010 via (Silverlight) XAML recursion bug 12 Ιουλίου 12 04:42 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Following up on a note about Visual Studio 2010 crashing at my previous post, this is the XAML that crashes VS2010 when opened up in a Silverlight project: <UserControl x:Class="SilverlightApplication1.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <UserControl.Resources> <ResourceDictionary> <Style x:Key="MyStyle" TargetType="StackPanel"> <Setter Property="Margin" Value="0,5,0,5" [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Fail, Silverlight, VisualStudio, XAML, Errors, ClipFlair, Styles, Recursion
How to space StackPanel items in XAML (has no Padding property) 11 Ιουλίου 12 01:34 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: While adding some properties to the back panels of ClipFlair windows, I came upon the issue of how to space items in a StackPanel. A Padding property is missing from multiple item containers (only single content controls have such), but a nice solution is described at: http://stackoverflow.com/questions/932510/how-do-i-space-out-the-child-elements-of-a-stackpanel Sergey Aldoukhov suggested there (WPF example): Use Margin [...]

Δημοσίευση στην κατηγορία: .NET, Posts, WPF, Silverlight, XAML, ClipFlair, HowTo, Layout, Padding, Margin, StackPanel
Collection of useful links for .NET, Silverlight, WPF etc. development 05 Ιουλίου 12 12:22 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: During the development of ClipFlair (currently at Alpha1-internal version), I’ve been doing lots of research, hunting for information (documentation, related discussion threads, useful download links) needed when writing and refactoring source code etc. I have tried to organize these links as (Windows) Internet shortcut files into folders. They do need some further restructuring, but they [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Downloads, WPF, Silverlight, Programming, Documentation, ClipFlair, Information, Development, Links, Reference
How to compile code that uses WPF Decorator type in Silverlight 04 Ιουλίου 12 09:57 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: At ClipFlair I’m using a modified version of FloatingWindow control, where I try to make the WPF and Silverlight flavours of the original control share as much code as possible (this is work in progress currently, hoping to eventually have the WPF and Silverlight projects both link to the same source files [this is currently [...]

Δημοσίευση στην κατηγορία: .NET, Posts, Compatibility, WPF, Silverlight, ClipFlair, Extensions, Decorator, Border, Alias Types
HowTo: Set UI language (CurrentUICulture) in Silverlight 20 Ιουνίου 12 04:11 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: At LvS (the opensource application of LeViS), I’ve been using this (VB.net) code to set the UI language (for example to Greek): Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("el") Others seem to have been using (C# – that’s why there is a trailing semicolon): Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("el"); assuming System.Globalization and System.Threading namespaces have been imported. However, now that I’m [...]

Δημοσίευση στην κατηγορία: UI, Posts, Silverlight, LvS, ClipFlair, Dynamic, HowTo, Localization
Zoom and Pan control for WPF and Silverlight (via WPF compatibility layer) 18 Ιουνίου 12 08:50 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I’ve managed to combine http://www.codeproject.com/Articles/85603/A-WPF-custom-control-for-zooming-and-panning and a cut-down version of it for Silverlight that was out there: http://www.codeproject.com/Articles/167453/A-Silverlight-custom-control-for-zooming-and-panni I did it in a way that the Silverlight version is source-code compatible with the WPF version (via a WPF compatibility layer that even implements value coercion), so that both the WPF and the Silverlight projects share [...]

Δημοσίευση στην κατηγορία: UI, Posts, Compatibility, WPF, Silverlight, ClipFlair, ZUI
InitializeError Message: Failed to load a platform extension in Silverlight 18 Ιουνίου 12 04:21 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: If you get an error like: Unhandled Error in Silverlight Application Code: 2153 Category: InitializeError Message: Failed to load a platform extension. Possibly corrupt or invalid file: … when you try to launch your Silverlight application (especially if you have the project set to use an autogenerated test page), you should read: http://forums.silverlight.net/t/185747.aspx/1 In my [...]

Δημοσίευση στην κατηγορία: Posts, Silverlight, Troubleshooting, Caching, Loading, XAP
IsolatedStorageSettings for WPF 18 Ιουνίου 12 04:01 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: System.IO.IsolatedStorageSettings doesn’t exist in WPF (only in Silverlight) but can easily be ported from Mono project’s Moonlight implementation (the Moonlight project home is at http://www.mono-project.com/Moonlight), as suggested at: http://groups.google.com/group/wpf-disciples/browse_thread/thread/4ed6c009f3fb7d69 I found that implementation at the following URL: http://vega.frugalware.org/tmpgit/moon/class/System.Windows/System.IO.IsolatedStorage/IsolatedStorageSettings.cs Did some modifications to IsolatedStorageSettings.cs to make it work with WPF (whether the application is deployed via [...]

Δημοσίευση στην κατηγορία: Posts, Compatibility, WPF, Silverlight, Dictionary, IsolatedStorageSettings, Isolated Storage, Persistence
Fix: compile CSpeex audio codec at Silverlight 4 RC+ and Silverlight 5 09 Ιουνίου 12 02:19 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Just added an issue to CSpeex project – http://cspeex.codeplex.com/workitem/18209 – with some fixes to make it compile for Silverlight 4 RC and higher (was for Silverlight 4 Beta), however still have issues with it not working correctly. Tagged: Audio, Capture, Codec, Demo, Silverlight, Speex, Webcam

Δημοσίευση στην κατηγορία: Posts, Silverlight, Demo, Codec, Speex, Audio, Capture, Webcam
workaround: Silverlight Rect class missing ‘bool Contains(Rect)’ method 29 Απριλίου 12 08:20 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I’ve been looking into porting Kael Rowan’s ZoomableCanvas (related to ZUI code used in Code Canvas, Debugger Canvas etc. VisualStudio add-ons) from WPF to Silverlight. One of the issues I found was that Silverlight’s Rect class (I guess this is a case for .NET Compact Framework in general) doesn’t have a method to check if [...]

Δημοσίευση στην κατηγορία: .NET, Posts, WPF, Silverlight, Extensions, ZUI, Rect, Contains
Combinatorics library (Silverlight for Windows Phone) 02 Δεκεμβρίου 11 06:15 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I recently found a very nice article at CodeProject on Combinatorics algorithms implementation (specifically Permutations, Combinations and Variations with Repetition option) using C# Generics: http://www.codeproject.com/KB/recipes/Combinatorics.aspx It uses a lexicographic algorithm, so it allows one to ask for “next” permutation/combination/variation from the collection of all possible ones, in the spirit of C++ Standard Library’s (STL) “next_permutation” [...]

Δημοσίευση στην κατηγορία: Posts, Silverlight, WP7, OpenSource, Free, Library, Class, Combinatorics
Fix: Visual Studio 2010 XAML Designer output for WP7 light theme 14 Νοεμβρίου 11 05:43 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: The other day I submitted my 1st Windows Phone 7 application via http://create.msdn.com Having registered for free as a student developer (being a PhD student on Robotics) via http://dreamspark.com I could only try my 1st app on WP7 emulator – when it gets accepted I will be able to have my WP7 phone unlocked to [...]

Δημοσίευση στην κατηγορία: Design, Posts, Bugs, Light, Silverlight, VisualStudio, XAML, Themes, WP7
Microsoft Expression Blend – learning and community resources 02 Ιουλίου 11 02:55 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Copying from Expression Blend 4 User Guide’s “Learning and community resources” section: Apart from this User Guide, the following additional content and resources are available. Expression Blend and other Expression Studio products Expression community website (training, tutorials, videos, and webcasts) Expression Blend and Expression Design team blog Expression Blend discussion forums Feedback and bug reporting [...]

Δημοσίευση στην κατηγορία: Design, UI, Posts, Microsoft, Blend, WPF, Resources, Learning, Expression, Silverlight

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