Moved Validation Error tracking to attached an attached property
Created an shared error indicator that can be simply added to control
templates and re-styled across all controls
This should reduce the need for code and markup duplication while
allowing for a consistent visual interface
- Share common layout logic between `Border`, `ContentPresenter` and `ScrollContentPresenter`
- Added a bunch of tests for things not previously convered
- Fix `ScrollContentPresenter` child layout
When a data context changes, it should be notified to all descendant controls who inherit the data context. This allows the `SelectingItemsControl` to defer setting the selected item until the `DataContext` has changed for the whole tree.
Renamed `OnDataContextChanging`/`OnDataContextChanged` to `OnDataContextBeginUpdate`/`OnDataContextEndUpdate` because `DataContextChanged` is now called from the property changed notification.
Fixes#507.
Previously it wasn't clear which constructor on `InstancedBinding` must be called for a particular binding mode. Refactored the constructors:
- We now have a single public ctor which takes an `ISubject`, as a subject can be used for all binding modes.
- Instanced bindings with other sources such as single values and `IObservables` are now constructed via static methods which only allow the correct sources for that binding mode
Dan Walmsley
Benedikt Schroeder
sdoroff
Steven Kirk
Jumar Macato
Jeremy Koritzinsky
José Pedro
Nikita Tsukanov
Eli Arbel