I'm trying to get my head around Avalonia in general, and the Reactive UI integration in particular. From googling around, I understand that Avalonia pulled away the Avalonia support in ReactiveUI, and tries to integrate ReactiveUI into Avalonia itself, to support a sometimes unstable Avalonia API.
I'm implementing a flow where a double tap on a DataGrid row should open a details windows, which I can do by adding a handler for the DoubleTapped event in the code behind. However, I was wondering if I could do this in a Reactive UI way, in a WhenActivated() implementation, by observing the DoubleTapped event.
In the ReactiveUI documentation, I see that there is a Pharmacist integration, which generates the observables for these events. However, when I fetch a reference to the DataGrid in the code behind, and try to hook into the DoubleTapped via
myDataGrid.Events(). ..., I don't get to see any events. Does this imply that there's no such support in Avalonia at this time?
Finally, while I'm at it, if I forget about the Reactive UI support, and use a straight-forward event handler, I need to do some stuff to detect whether it was a row that was double tapped, or something else (such as the header). I have to do this, because there's no EventSetter implementation in Avalonia as I understand it.
Somebody who knows if Avalonia will support this in the future?
Edit: in the end I used ReactiveUI somewhat similar to
TreeView.GetObservable(DoubleTappedEvent)
.Subscribe(async x =>
{
var selectedItem = TreeView.SelectedItem;
if (selectedItem is TreeNodeViewModel treeNodeViewModel)
{
await ViewModel!.ActivateResource(treeNodeViewModel);
}
}).DisposeWith(d);
An attached behaviour can also help to bind events to perform logic. There is a sample that looks like it could work provided the DoubleTappedEvent is being fired.
Avalonia Docs - Creating and binding Attached Properties
The dev tools should help show the event your are looking for tunnel and bubble though the DataGrid?
Pharmacist does not support Avalonia. They are working on ReactiveMarbles.ObservableEvents, which as of right now, doesn't work on generic classes, but they're working on fixing it.
Related
I have read the two other questions on SO regarding this and I wanted to know if there is a good solution for that now / best practice.
Long story short, we use an SDK which is written natively and we've wrapped it so that it works on Xamarin.Android and Xamarin.iOS. It has asynchronous callback methods. I need to call a method in the shared code when a callback is received in the Android project for instance.
There's a lot of info for doing the opposite - using DependencyService. How about in my scenario? Does anyone have experience with an app like this and what's the best approach to keep code clean and do this using MVVM?
The options I know are:
Using a static App instance - this is what we currently do.
MessagingCenter
Anything else?
Actually I've never seen anyone recommend usage of MessagingCenter for anything else than communication between ViewModels so I am not sure it is recommended here. Also, I need to know the sender object type so I need a reference to the class in the platform specific project.
I would recommend you to use messagingCenter to pass data or call method between shared project and platform project. You can just send a new object instead of the class in the platform specific project.
Also, have a look at using eventhandler as I mentioned in this answer may help someone who want to call from the shared project into the platform specific one.
BTW, I mean you can even pass an object as TSender if it is not necessary to use:
MessagingCenter.Send<Object>(new object(), "Hi");
MessagingCenter.Subscribe<Object>(new object(), "Hi", (sender) =>
{
// Do something whenever the "Hi" message is received
});
Dialog can do almost everything according to the bot framework documentation, but it will take a lot more time to investigate than FormFlow. I failed to find a place that have lots of samples of bot framework yet. At the moment, before I spend a lot of time to try dialog, anyone know if it's possible to chain commands using FormFlow.
The work I am trying to do is to code a chain of commands:
query records
select a record from the results
actions/operations on the record
etc...
Really appreciate if anyone familiar with Bot Framework can help me on this.
Use the IDialogStack.Call method in your FormFlow handlers to call another dialog and push it on the stack.
Then use the IDialogStack.Done method to pop it off the stack. Both described here.
It's unclear whether the Timeline features are supported when using only the pebble.js approach (e.g. no C code). Can anyone comment?
Yes, you can use Pebble.js to call regular PebbleKitJS functions (e.g., Pebble.getTimelineToken).
As far as pushing pins to the timeline, pins are pushed via the timeline Web API, which means you can use the ajax function to make a request to the API from within Pebble.js.
I'm trying to modify the behaviour of the NewIssuesEmailTemplate in SonarQube 4.0. I want to put richer information into the generated emails. It looks as if everything I need is put in the Notification by IssueNotifications.
What I want to know is if it's possible to override the fact that NewIssuesEmailTemplate is the handler for Notifications of type "new-issues".
I'm going to hazard that this can be done by creating a new plugin that overrides the specific behaviour of CorePlugin, and making sure that this gets loaded first, but I don't really know how to go about it.
Has anyone done anything like this before? I don't seem to be able to find any hints to get me started.
You cannot change the fact that NewIssuesEmailTemplate is the handler for notifications of type "new-issues".
All you can do is to add new channels or dispatchers using the extensions available in the notification API. You can check how this is done by the Core Email plugin.
I've currently inherited an application which has numerous Kendo grids (and other controls) throughout, and I'm trying to fix an error which keeps cropping up now and again - specifically when the user is no longer authenticated.
I know what the solution is for a single instance of the control - return a flag to indicate authentication failed, and then detect this in the error handler and perform the authentication.
The problem is am I really going to have to handle this for every instance of a Kendo control I have? Is there not a global error handler I can hook into? Either for the data source itself (as I know this is used for all Kendo control data loading), or for the Grid specificially. I don't mind either way - just which one is a hook.
This would be a more straighforward short term solution than refactoring everything to specific error handlers, etc.
I assume you can attach a global error handler to $.ajax, which is used by the DataSource, you can check how to do it here:
http://api.jquery.com/category/ajax/global-ajax-event-handlers/
Or, you can take advanttage of that the configuration that is done in the DataSource is passed directly to the $.ajax:
http://docs.kendoui.com/api/framework/datasource#configuration-transport.read-ObjectStringFunction
For reference, someone from Telerik has provided a solution using just the DataSource. I haven't tested it, but I prefer the accepted answer above as it hooked into all Ajax on the site - not just ones that utilise the Kendo DataSource.
http://www.kendoui.com/forums/mvc/grid/global-error-handler-for-numerous-grids.aspx