Essentials: Extra feature: Clipboard changed event

[SaskiaL]

I would like to have a clipboard changed event. So that when another app puts something on the clipboard, that my app can pick it up and do something with it.

For instance, if a device has a hardware scanner that scans barcodes and puts the result on the clipboard, our app should get the read barcode.

I have tried to use my old code for the change event ((AddPrimaryClipChangedListener)) together with Clipboard, but then the changed event is no longer triggered.

Kind regards,
Saskia

// Essentials Team Info
Researched a bit:

• Android: Use the Manager Listener
• UWP: Easy event to register for docs
  *iOS: Need NSNotificationCenter Observer

API:

public static event EventHandler<ClipboardChangedEventArgs> ClipboardChanged;

 public class ClipboardChangedEventArgs: EventArgs
    {

    }

We don't need to return any information in the eventargs, because our API should return this. It is a generic clipboard changed, we don't know if it is text or other items....

[Mrnikbobjeff]

On IOS this feature might require setting up some code in the app initialization function. Should not be a problem on Android and iOS

[jamesmontemagno]

Added documentation, should be pretty easy to do :) Up for grabs :)

[mattleibow]

The implementation can probably follow the pattern o the sensor events. When a handler is attached, then start the listeners, and when the last handler is detached, then stop the events.

[Mrnikbobjeff]

Am working on it, a pr should be up before the end of the week 👍

[jamesmontemagno]

@Mrnikbobjeff can you base it off of the 1.1.0 branch :)

[manishkungwani]

@jamesmontemagno @Mrnikbobjeff looks like the code and docs were done here - https://github.com/xamarin/Essentials/pull/720

What's pending, if anything?
If so, can I pick it up and finish it off.

[jamesmontemagno]

Implemented.

[SaskiaL]

I tried to install version 1.4.0-pre2 to try the new event, but got this error message:
Failed to add reference. The package 'Xamarin.Essentials' tried to add a framework reference to 'System.Drawing.Common.dll' which was not found in the GAC.

Is this a problem with the package? Or do I need to install extra packages?

Thanks, Saskia

[manishkungwani]

Hi,
I'm trying to use the package as well, with no luck.
If this is an open issue, can you please direct me and I will try to fix it.
With Warm Regards,Manish Kungwani

On Tuesday, 28 January, 2020, 03:50:40 pm IST, SaskiaL <[email protected]> wrote:

I tried to install version 1.4.0-pre2 to try the new event, but got this error message:
Failed to add reference. The package 'Xamarin.Essentials' tried to add a framework reference to 'System.Drawing.Common.dll' which was not found in the GAC.

Is this a problem with the package? Or do I need to install extra packages?

Thanks, Saskia

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[SaskiaL]

I have added the package 1.4.0 pre2 again and this time it worked.
I think I had to update some other packages. I'm sorry, I don't remember which package(s) exactly.
I started with a new app and tried it there and that worked. That gave me the idea to check the other nuget packages.

I tried the new onchange event and it works like a charm.

Thanks, Saskia