George Birbilis' blog

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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

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