LampArray.AvailabilityChanged Evento
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Se genera cuando cambia el valor de IsAvailable ; lo que puede ocurrir cuando el usuario cambia el acceso del sistema al dispositivo a través de la configuración del dispositivo.
Los parámetros del controlador de eventos son el remitente LampArray cuya propiedad ha cambiado y un objeto (que siempre es null).
// Register
event_token AvailabilityChanged(TypedEventHandler<LampArray, IInspectable const&> const& handler) const;
// Revoke with event_token
void AvailabilityChanged(event_token const* cookie) const;
// Revoke with event_revoker
LampArray::AvailabilityChanged_revoker AvailabilityChanged(auto_revoke_t, TypedEventHandler<LampArray, IInspectable const&> const& handler) const;
/// [Windows.Foundation.Metadata.Experimental]
/// [add: Windows.Foundation.Metadata.Experimental]
/// [remove: Windows.Foundation.Metadata.Experimental]
// Register
event_token AvailabilityChanged(TypedEventHandler<LampArray, IInspectable const&> const& handler) const;
// Revoke with event_token
void AvailabilityChanged(event_token const* cookie) const;
// Revoke with event_revoker
LampArray::AvailabilityChanged_revoker AvailabilityChanged(auto_revoke_t, TypedEventHandler<LampArray, IInspectable const&> const& handler) const;
public event TypedEventHandler<LampArray,object> AvailabilityChanged;
[Windows.Foundation.Metadata.Experimental]
[add: Windows.Foundation.Metadata.Experimental]
[remove: Windows.Foundation.Metadata.Experimental]
public event TypedEventHandler<LampArray,object> AvailabilityChanged;
function onAvailabilityChanged(eventArgs) { /* Your code */ }
lampArray.addEventListener("availabilitychanged", onAvailabilityChanged);
lampArray.removeEventListener("availabilitychanged", onAvailabilityChanged);
- or -
lampArray.onavailabilitychanged = onAvailabilityChanged;
Public Custom Event AvailabilityChanged As TypedEventHandler(Of LampArray, Object)
Tipo de evento
TypedEventHandler<LampArray,IInspectable>
- Atributos
Requisitos de Windows
Familia de dispositivos |
Windows 11 Insider Preview (se introdujo en la versión 10.0.23504.0)
|
API contract |
Windows.Foundation.UniversalApiContract (se introdujo en la versión v15.0)
|
Ejemplos
Muestra cómo controlar la iluminación RGB de los dispositivos periféricos mediante las API Windows.Devices.Lights y Windows.Devices.Lights.Effects .
Muestra cómo extraer un único color representativo de una pantalla de escritorio y usarlo para iluminar lámparas LED en un dispositivo RGB conectado.
Ejemplo de evento AvailabilityChanged
En el ejemplo siguiente se muestra cómo configurar un controlador para un AvailabilityChanged evento. Observe cómo el código comprueba primero si la IsAvailable propiedad está disponible antes de declarar el controlador.
using System;
using System.Collections.Generic;
using Windows.Devices.Enumeration;
using Windows.Devices.Lights;
namespace Sample
{
class LampArrayHelper
{
private readonly DeviceWatcher watcher;
private readonly Dictionary<string, LampArray> lampArrays;
private readonly Dictionary<string, LampArrayEffectPlaylist> playlists;
public LampArraySample()
{
lampArrays = new Dictionary<string, LampArray>();
playlists = new Dictionary<string, LampArrayEffectPlaylist>();
watcher = DeviceInformation.CreateWatcher(LampArray.GetDeviceSelector());
watcher.Added += Watcher_Added;
watcher.Removed += Watcher_Removed;
watcher.Start();
}
private void DoEffectSetup(LampArray device)
{
Console.WriteLine("Starting effect playlist...");
var indices = Enumerable.Range(0, device.LampCount).ToArray();
var effect = new LampArraySolidEffect(device, indices)
{
Color = Colors.Red,
CompletionBehavior = LampArrayEffectCompletionBehavior.KeepState,
Duration = TimeSpan.FromMilliseconds(3000)
};
var effect2 = new LampArraySolidEffect(device, indices)
{
Color = Colors.Blue,
CompletionBehavior = LampArrayEffectCompletionBehavior.KeepState,
Duration = TimeSpan.FromMilliseconds(3000)
};
var playlist = new LampArrayEffectPlaylist();
playlist.Append(effect);
playlist.Append(effect2);
playlist.Start();
lock (playlists)
{
playlists.Add(device.DeviceId, playlist);
}
}
private async void Watcher_Added(DeviceWatcher sender, DeviceInformation args)
{
var lampArray = await LampArray.FromIdAsync(args.Id);
lock (lampArrays)
{
lampArrays[args.Id] = lampArray;
}
if (lampArray.LampArrayKind == LampArrayKind.Headset)
{
Console.WriteLine("Headset LampArray attached: " + lampArray.DeviceId);
}
if (ApiInformation.IsPropertyPresent("Windows.Devices.Lights.LampArray", "IsAvailable"))
{
if (lampArray.IsAvailable)
{
DoEffectSetup(lampArray);
}
lampArray.AvailabilityChanged += LampArray_AvailabilityChanged;
}
else
{
DoEffectSetup(lampArray);
}
}
private void Watcher_Removed(DeviceWatcher sender, DeviceInformationUpdate args)
{
lock (lampArrays)
{
lampArrays.Remove(args.Id);
}
lock (playlists)
{
if (playlists.ContainsKey(args.Id))
{
playlists[args.Id].Stop();
playlists.Remove(args.Id);
}
}
}
private void LampArray_AvailabilityChanged(LampArray sender, object args)
{
if (sender.IsAvailable)
{
Console.WriteLine("Device available: " + sender.DeviceId);
DoEffectSetup(sender);
}
else
{
Console.WriteLine("Device unavailable: " + sender.DeviceId);
lock (playlists)
{
if (playlists.ContainsKey(sender.DeviceId))
{
playlists[sender.DeviceId].Stop();
playlists.Remove(sender.DeviceId);
}
}
}
}
}
}
#include <windows.h>
#include <algorithm>
#include <memory>
#include <numeric>
#include <vector>
#include <map>
#include <wil/resource.h>
#include <winrt/base.h>
#include <winrt/windows.devices.lights.h>
#include <winrt/windows.devices.lights.effects.h>
#include <winrt/windows.devices.enumeration.h>
#include <winrt/windows.foundation.h>
#include <winrt/windows.foundation.metadata.h>
#include <winrt/windows.ui.h>
namespace winrt
{
using namespace winrt::Windows::Devices::Enumeration;
using namespace winrt::Windows::Devices::Lights;
using namespace winrt::Windows::Devices::Lights::Effects;
using namespace winrt::Windows::Foundation;
using namespace winrt::Windows::Foundation::Metadata;
using namespace winrt::Windows::UI;
}
wil::srwlock lampArraysLock;
std::shared_ptr<std::map<winrt::hstring, winrt::LampArray>> lampArrays;
wil::srwlock playlistsLock;
std::shared_ptr<std::map<winrt::hstring, winrt::LampArrayEffectPlaylist>> playlists;
void DoEffectSetup(winrt::LampArray device)
{
wprintf(L"Starting effect playlist...\n");
std::vector<int32_t> indices(device.LampCount());
std::iota(indices.begin(), indices.end(), 0);
auto effect = winrt::LampArraySolidEffect(device, indices);
effect.Color(winrt::Colors::Red());
effect.CompletionBehavior(winrt::LampArrayEffectCompletionBehavior::KeepState);
effect.Duration(std::chrono::milliseconds(3000));
auto effect2 = winrt::LampArraySolidEffect(device, indices);
effect2.Color(winrt::Colors::Blue());
effect2.CompletionBehavior(winrt::LampArrayEffectCompletionBehavior::KeepState);
effect2.Duration(std::chrono::milliseconds(3000));
auto playlist = winrt::LampArrayEffectPlaylist();
playlist.RepetitionMode(winrt::LampArrayRepetitionMode::Forever);
playlist.Append(effect);
playlist.Append(effect2);
playlist.Start();
auto lock = playlistsLock.lock_exclusive();
playlists->emplace(std::make_pair(device.DeviceId(), playlist));
}
int __cdecl main()
{
lampArrays = std::make_shared<std::map<winrt::hstring, winrt::LampArray>>();
playlists = std::make_shared<std::map<winrt::hstring, winrt::LampArrayEffectPlaylist>>();
auto deviceWatcher = winrt::DeviceInformation::CreateWatcher(winrt::LampArray::GetDeviceSelector());
auto deviceAddedRevoker = deviceWatcher.Added(winrt::auto_revoke, [](winrt::DeviceWatcher, winrt::DeviceInformation info)
{
auto deviceId = info.Id();
auto lampArray = winrt::LampArray::FromIdAsync(deviceId).get();
if (lampArray)
{
wprintf(L"LampArray %s added\n", deviceId.c_str());
{
auto lock = lampArraysLock.lock_exclusive();
lampArrays->emplace(std::make_pair(deviceId, lampArray));
}
if (winrt::ApiInformation::IsPropertyPresent(L"Windows.Devices.Lights.LampArray", L"IsAvailable"))
{
if (lampArray.IsAvailable())
{
DoEffectSetup(lampArray);
}
lampArray.AvailabilityChanged([](winrt::LampArray device, winrt::IInspectable)
{
if (device.IsAvailable())
{
wprintf(L"Device available: %s\n", device.DeviceId().c_str());
DoEffectSetup(device);
}
else
{
wprintf(L"Device unavailable: %s\n", device.DeviceId().c_str());
auto lock = playlistsLock.lock_exclusive();
auto entry = playlists->find(device.DeviceId());
if (entry != playlists->end())
{
entry->second.Stop();
playlists->erase(entry);
}
}
});
}
else
{
DoEffectSetup(lampArray);
}
}
});
auto deviceRemovedRevoker = deviceWatcher.Removed(winrt::auto_revoke, [](winrt::DeviceWatcher, winrt::DeviceInformationUpdate info)
{
auto deviceId = info.Id();
{
auto lock = lampArraysLock.lock_exclusive();
lampArrays->erase(deviceId);
}
{
auto lock = playlistsLock.lock_exclusive();
auto entry = playlists->find(deviceId);
if (entry != playlists->end())
{
entry->second.Stop();
playlists->erase(entry);
}
}
wprintf(L"LampArray %s removed\n", deviceId.c_str());
});
deviceWatcher.Start();
wprintf(L"Press any key to exit\n");
getchar();
deviceWatcher.Stop();
return 0;
}
Comentarios
Tanto las aplicaciones en primer plano como en segundo plano ("ambiente") pueden recibir y controlar este evento.
Para usar este evento, debes declarar la appExtension "com.microsoft.windows.lighting" en el manifiesto de la aplicación. Para más información sobre cómo hacerlo, consulte Creación y hospedaje de una extensión de aplicación.
<Extensions>
<uap3:Extension Category="windows.appExtension">
<uap3:AppExtension Name="com.microsoft.windows.lighting" Id="Id" DisplayName="Id">
</uap3:AppExtension>
</uap3:Extension>
</Extensions>