George Birbilis' blog

Παρουσίαση με Ετικέτες

Gotcha: MarkerReached event of MediaElement returns new Markers 20 Μαρτίου 15 08:50 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I just checked in the implementation code for a new feature for ClipFlair Studio’s Captions/Revoicing component: When playing back recorded (or loaded from a WAV or MP3 file) audio for a caption/revoicing entry, the playback is now limited to the duration of the respective caption, (End-Start) time that is (btw that component has a duration […]

Δημοσίευση στην κατηγορία: Posts, ClipFlair, Gotcha, Events, MediaElement, MarkerReached, Markers, TimelineMediaMarker, Timeline
Gotcha: MediaElement Source=null releases stream, SetSource(null) fails 12 Δεκεμβρίου 14 05:32 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: This is my contribution to: http://stackoverflow.com/questions/19294258/forcing-mediaelement-to-release-stream-after-playback/27436323 If you use MediaElement, make sure you don’t get bitten by this one: http://msdn.microsoft.com/en-us/library/cc626563(v=vs.95).aspx ArgumentNullException – The mediaStreamSource is null. … After calling this method, MediaElement.Source returns null. If this is called and MediaElement.Source is set, the last operation wins. If a MediaElement is removed from the UI tree […]

Δημοσίευση στην κατηγορία: Posts, Resources, Silverlight, ClipFlair, Audio, Gotcha, Source, Media, MediaElement, null, Arguments, SetSource, Cleanup
Gotcha: MediaElement must be in visual tree for MediaOpened, MediaEnded to be fired 18 Νοεμβρίου 14 04:18 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: At ClipFlair’s AudioRecorderControl (used in Captions/Revoicing component of ClipFlair Studio), I use the following code to initialize a MediaElement to use for playback. After a long time a found out that if the MediaElement is not in the visual tree (for example defined in XAML, or defined in code and then added to the visual […]

Δημοσίευση στην κατηγορία: Posts, Silverlight, Player, ClipFlair, Gotcha, Media, Events, MediaElement, MediaEnded, MediaOpened
Gotcha: MediaElement AutoPlay faster than doing Play at MediaOpened 18 Νοεμβρίου 14 02:27 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Just added the following comment to: https://github.com/loarabia/ManagedMediaHelpers/issues/15 Managed Media Helpers contains the very useful Mp3MediaSource class for .NET / Silverlight / Windows Phone. Added compile-time SWITCHES and respective code to Silverlight demo code for PRELOAD (into memory stream) and AUTOPLAY (this was a bit tricky, need to call Play at MediaOpened event, not right after […]

Δημοσίευση στην κατηγορία: Posts, Silverlight, Player, ClipFlair, Gotcha, Media, Events, AutoPlay, Speed, MediaElement
Gotcha: JS replace on document.location fails, use document location.href 20 Αυγούστου 14 03:17 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: This is my contribution to: http://stackoverflow.com/questions/2652816/what-is-the-difference-between-document-location-href-and-document-location Here is an example of the practical significance of the difference and how it can bite you if you don’t realize it (document.location being an object and document.location.href being a string): We use MonoX Social CMS (http://mono-software.com) free version at http://social.ClipFlair.net and we wanted to add the language bar […]

Δημοσίευση στην κατηγορία: Posts, ClipFlair, RegEx, Gotcha, URL, Replace, Javascript, HTML, DOM
Gotcha: don’t use ‘{$…}’ syntax or ‘$…’ syntax in XSL-XPath’s concat 15 Αυγούστου 14 11:57 μμ | Μπιρμπίλης Γεώργιος | 1 σχόλια: <xsl:template match="cxml:Item" mode="col"> <xsl:variable name="FILENAME" select="…someXPathQuery…"/> <xsl:variable name="IMAGE" select="concat(‘http://gallery.clipflair.net/activity/image/’, $FILENAME, ‘.png’)"/> … I got confused a bit today after a long day of fiddling with XSL and ClipFlair Activity Gallery’s CXML (Collection XML) data (as used in PivotViewer control), and didn’t understand why I couldn’t use an XSL variable’s (FILENAME in the sample […]

Δημοσίευση στην κατηγορία: Transforms, Posts, Expression, ClipFlair, Gotcha, String, XPath, XSL, StringConcatenation, Variables
Gotcha: no prefix increment/decrement VB.net operators, but get parsed 09 Αυγούστου 14 03:39 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: In C/C++ and C# one has useful prefix (++index) and postfix (index++) increment operators and corresponding decrement ones. Although they have a single operant, they’re not working like functions as single + or – prefix would do, but instead they cause side-effects – they edit the variable passed to them. The prefix increment operator first […]

Δημοσίευση στην κατηγορία: Posts, ClipFlair, C#, Gotcha, Prefix, Conversion, Increment, Postfix, VB.net, Operators
Gotcha: System.IO.GetInvalidPathChars result not guaranteed 04 Απριλίου 14 12:54 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: at System.IO.Path.GetInvalidPathChars one reads: The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names note: can also call this method from non-trusted Silverlight app – not as Intellisense tooltip wrongly says in Visual Studio 2013 with Silverlight 5.1 I just found […]

Δημοσίευση στην κατηγορία: .NET, Posts, Silverlight, ClipFlair, RegEx, Gotcha, Replace, Characters, Invalid, Filename
Gotcha: OnLostMouseCapture always called by CaptureMouse at WPF 14 Μαρτίου 14 12:08 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: It seems that CaptureMouse is behaving differently in WPF and Silverlight, in that in the former one it immediately calls OnLostMouseCapture at a Visual, whereas in Silverlight it doesn’t get called if the element didn’t have the mouse capture already (btw, in Silverlight that method is at a UIElement – there is no Visual ancestor […]

Δημοσίευση στην κατηγορία: UI, Posts, WPF, Silverlight, ClipFlair, Capture, Gotcha, Tracking, Mouse, Events, Inconsistency, Color, IsMoveToPointEnabled, Slider
Gotcha: .NET Point and PointConverter inconsistency in string format used 22 Νοεμβρίου 13 01:47 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I have submitted the following issue to Microsoft Connect (product feedback center): http://connect.microsoft.com/VisualStudio/feedback/details/809084/point-class-issue-with-two-way-databinding Point class issue with two-way databinding In Silverlight, when using databinding code like the following: <StackPanel Orientation="Vertical" Name="propPosition"> <sdk:Label Style="{StaticResource PropertyLabelStyle}" Content="Position:" Target="{Binding ElementName=edPosition}" /> <TextBox Name="edPosition" Text="{Binding Position, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=true}" /> </StackPanel> and binding (via DataContext) to […]

Δημοσίευση στην κατηγορία: .NET, UI, Posts, Bugs, ClipFlair, Gotcha, Binding, String, Conversion, PointConverter, Point
Gotcha: use server-side comment, not HTML comment in ASP.net 29 Ιουλίου 13 01:15 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: I try to remember to use <%– and –%> instead of <!– and –> for comments in server-side web pages, to avoid having implementation details (for security reasons that is) in the output HTML and to keep the download size smaller / have the pages load faster. What came to me though the other day […]

Δημοσίευση στην κατηγορία: Posts, Server, ClipFlair, Gotcha, ASP.net, JSP, Comments
Gotcha: var x = x() in Javascript gives “Object Expected” error 14 Ιουνίου 13 12:27 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: At ClipFlair Studio (a Silverlight app), I had some time ago implemented a confirmation warning upon user trying to close the webpage (when it was running inside the web browser), which then had stopped functioning. It seems at some refactoring I had added code like the following: var activityView = activityView(); and it was failing […]

Δημοσίευση στην κατηγορία: Posts, Silverlight, Scripts, ClipFlair, Gotcha, Warning, Javascript, BeforeUnload, RegisterScriptableObject, HtmlBridge, Confirmation, Events, Closing
Gotcha: Image component not loading remote URLs during debugging 18 Δεκεμβρίου 12 01:13 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: At ClipFlair’s Image component I use the following XAML to make it show an image from a URL that its ViewModel holds at a property named “Source”, of type Uri (URI = Uniform or Universal Resource Identifier in W3C parlance, something like a superset of the old classic URLs). <Image Name="imgContent" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" [...]

Δημοσίευση στην κατηγορία: Security, Posts, Fail, Silverlight, ClipFlair, Loading, Gotcha, URL, Image, Debug
Can’t step-through Silverlight file dialogs with Visual Studio debugger 02 Δεκεμβρίου 12 08:58 μμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: While stepping through “ShowDialog()” method of OpenFileDialog with Visual Studio 2010 debugger, at the Silverlight code pictured below (for loading a ClipFlair window’s stored options), I got a “Dialogs must be user-initiated” exception. Same behaviour will be shown with SaveFileDialog too, every time you try to step through the “ShowDialog()” method. This is because of [...]

Δημοσίευση στην κατηγορία: Security, UI, Posts, Filesystem, Silverlight, ClipFlair, HowTo, Gotcha, Debug, Dialogs
HowTo: Clear contents of Silverlight’s RichTextBox control 23 Νοεμβρίου 12 12:12 πμ | Μπιρμπίλης Γεώργιος | 0 σχόλια: Was just debugging an issue with loading of saved state at ClipFlair’s Text component, when I realized that Silverlight’s (and WPF’s) RichTextBox control doesn’t accept an empty string at its Xaml proprerty to clear its contents as one would expect. Instead clearing the contents of the RichTextBox requires a call to Blocks.Clear(). In ClipFlair’s case, [...]

Δημοσίευση στην κατηγορία: Posts, XAML, ClipFlair, HowTo, Gotcha, RichTextBox
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
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

George Birbilis' blog

Παρουσίαση με Ετικέτες

Search

Το Ιστολόγιο

Ετικέτες

Πλοήγηση

Ιστορικό Δημοσιεύσεων

Συνδρομές