Changelog since OpenSilver 1.0

New Xaml features:

• Core features:
  • Animation:
    • PointAnimation (partially) implemented
    • ColorAnimationUsingKeyFrames
    • Animations targets can now be DependencyObjects instead of FrameworkElements
  • Bindings:
    • Add support for ElementName and Relative Mode = TemplatedParent binding created in C# (previously could only be used in a xaml file)
    • ICollectionView and CollectionViewSource are now properly supported in bindings
    • Path representing an attached property are now supported (in xaml only)
    • Add support for UpdateSourceTrigger.LostFocus
  • Triggers:
    • FrameworkElement Triggers (including EventTrigger, TriggerAction, BeginStoryboard)
  • Virtualization:
    • Add support for virtualized panels (VirtualizingPanel, VirtualizingStackPanel)
  • Add Support for initialization parameters:
    • StartupEventArgs.InitParams
    • Host.InitParams
    • ApplicationServiceContext.InitParams
  • Validation:
    • Add support for Validation states
    • Validation error Popup is not shown automatically, each control has the responsibility to display it
  • Components:
    • ProgressBar
    • Polyline
    • PrintDocument
    • OpenFileDialog
    • InkPresenter
    • StylusDevice
    • XmlLanguage
    • BrowserInformation
    • ImageBrush
    • CompositionHost and CompositionInitializer
  • Features:
    • Implement TransformGroup.Value property
    • Implement mouse wheel scrolling on templated ScrollViewers
    • Implement debouncing on Scrollbars
    • Implement TextInput event
    • Implement ToolTip’s Placement and PlacementTarget properties
    • Handles ToolTip’s Open and Closed visual states
    • Support retrieving Guids from Interop calls
    • Implement Settings.Windowless property
    • Implement Application.LoadComponent method
• Blend SDK:
  • Port the System.Windows.Interactivity assembly based on the official XamlBehaviors for WPF repo : https://github.com/microsoft/XamlBehaviorsWpf/
  • Port the Microsoft.Expressions.Interactions assembly (based on the XamlBehaviors for WPF repo too)
• Silverlight Toolkit:
  • Port the System.Windows.Controls.Layout.Toolkit assembly from https://github.com/microsoftarchive/SilverlightToolkit/tree/master/Release/Silverlight5/Source/Controls.Layout.Toolkit
    • Includes: LayoutTransformer, Accordion, TransitioningContentControl
  • Port the System.Windows.Controls.Data assembly from https://github.com/microsoftarchive/SilverlightToolkit/tree/master/Release/Silverlight4/Source/System.Windows.Controls.Data
    • Includes: DataGrid, DataPager
  • Port the System.Windows.Controls.Input assembly from https://github.com/microsoftarchive/SilverlightToolkit/tree/master/Release/Silverlight4/Source/Controls.Input
    • Includes: AutoCompleteBox
  • Port the System.Windows.Controls.Navigation assembly from https://github.com/microsoftarchive/SilverlightToolkit/tree/master/Release/Silverlight4/Source/System.Windows.Controls.Navigation
    • Includes: Frame, Page, NavigationService
  • Partially port the System.Windows.Controls.DataVisualization.Toolkit assembly from https://github.com/microsoftarchive/SilverlightToolkit/tree/master/Release/Silverlight5/Source/Controls.DataVisualization.Toolkit
  • Port several other components from the toolkit (CalendarDayButton, DragDecorator, TreeViewItemCheckBox…)

Improved Xaml features:

• Bindings
  • OneTime bindings are updated on DataContext changes
• Custom Layout:
  • Multiple improvements and bug fixes
• Routed Events
  • Improve calculation of the event route
  • Improve reliability of marking an event as handled
• Clipboard
  • Refactor Clipboard to use the Clipboard API when applicable
• Inheritance context improvements:
  • Inherited context propagates to FrameworkElements inside a ResourceDictionary
  • Inherited context propagates inside VisualStateGroups and Storyboards
• Remove DependencyObject constraint on DependencyObjectCollection generic parameter
• ActualWidth/ActualHeight dependency properties are now updated when the size changes
• Static resources lookup algorithm has been improved to match Silverlight’s behavior
• Multiple TextBox improvements:
  • KeyDown event handling improved
  • TextInput event handling improved
  • Updating the text property during the TextChanged event now properly impacts the displayed text
  • Typing is now allowed even if MaxLength is reached if there is an active selection
  • TextWrapping property’s default value is now NoWrap
• Multiple ComboBox improvements:
  • Displayed item match closer Silverlight’s behavior
  • ComboBox presenter’s is not hit testable
  • Improve disabled state
• Mutliple DatePicker improvements:
  • Selected date is now displayed in the requested format
  • Check for values that are not a valid date
  • Disabled visual state has been added
• NotImplementedAttribute can now be declared on an Assembly
• Implement XAML namescopes: improves FrameworkElement.FindName, Control.GetTemplateChild
• Include build information into assemblies
• Allow providing a set of known types when initiating a request needed to serialize the request

Reworks:

• Rewrite ItemContainerGenerator based on the WPF implementation
• Rewrite ToolTipService and ToolTip based on the Silverlight behavior
• Rewrite VisualTreeHelper based on the WPF implementation
• Rewrite NumericUpDown based on the Silverlight toolkit original code: https://github.com/microsoftarchive/SilverlightToolkit/blob/master/Release/Silverlight5/Source/Controls.Input.Toolkit/NumericUpDown/NumericUpDown.cs
• Rewrite Selector based on the WPF implementation
• Rewrite PasswordBox to use a proper template

BugFixes:

• Runtime:
  • Fix several cases where objects were not converted to a JavaScript string in invariant culture
  • The UIElement.IsVisible property is now false and its backing dependency property is private as the property is meant to be read only
  • Start index of collection changed notification raised by DependencyObjectCollection.Add has been adjusted
  • Previously selected items in ComboBoxes are no longer incorrectly highlighted
  • VisualTreeHelper.FindElementsInHostCoordinates(Point, UIElement) now returns a list of the elements that pass the hit test instead of only the top-most element
  • Turn Border.Child into a dependency property (to enable bindings)
  • Interop Implementation is now thread safe in the simulator
  • TextBox.Select(int, int) method no longer causes NullReferenceExceptions
  • Fix HyperlinkButton internal navigation behavior
  • Rectangles with rounded corners now render properly
  • Custom markup extensions are now supported on attached properties
  • Mouse Capture is now released after receiving a “mouse up” event
  • UIElement.TransformToVisual now returns a MatrixTransform
  • ButtonBase.CanExecute is now refreshed when CommandParameter changes
  • Fix an issue where Popup would be opened in the background
  • Fix an issue where setting the HorizontalAlignment would render an otherwise collapsed element
  • Rect Constructors have been fixed
  • Preserve the user state object provided for asynchronous calls
• Compiler:
  • Prefix generated fields name with ‘@’ to prevent collisions with reserved names (for example x:Name=”this”)
  • Reduce the size of the methods generated by the compiler. This reduces considerably the chance to pass to the mono interpreter a method that exceed the maximum size it can handle.
  • Add support for legacy Silverlight 1.0 xaml namespace
  • Generate separate files during pass1 and pass2 of the xaml preprocessor
  • Subclasses of ResourceDictionary defined by Source are now supported in XAML
  • ServiceReferenceFixer now supports DuplexClientBase and “out” parameters

Performance:

• Use Resize Observer API instead of ResizeSensor for size change notifications
• Listen to “touch” events only when the device supports it.
• Reduce the amount of divs rendered under CustomLayout
• Refactor OpenSilver.Profiler class to not rely on Interop calls to measure time.
• Optimize some default template (ex: HyperlinkButton)
• Minimize the number of context switches between C# and Javascript due to routed events

Simulator:

• It is now possible to scroll in the properties panel.
• Enabled inspection of read-only properties
• Added a button to refresh all read-only properties at once
• Added support for HtmlWindow.Alert and HtmlWindow.Confirm
• Added the possibility to save a html snapshot from a breakpoint
• Added a “AppStartedCallback” parameter to SimulatorLaunchParameters that will be called when the app is started
• Implemented Dispatcher.CheckAccess()
• Added option to set the InitParams in SimulatorLaunchParameters.
• Prevented the Simulator from showing the “0 errors” red block during rendering

VSIX:

• Now allows to pick between targeting .Net 6 or 7 preview
• Application templates now include a nuget.config file which directs to OpenSilver’s MyGet feed, for easy access to the latest builds
• The default Startup project is now the .Browser one.

Others:

• Support for .woff2 resources
• Xml Documentation files are now included in NuGet packages
• Added a check during build on whether msbuild is using an old compiler, in which case a custom error message will be shown to help you fix it.