SystemMediaTransportControls.PlaybackRateChangeRequested 事件

定义

命名空间:

Windows.Media

当用户修改 SystemMediaTransportControls 播放速率时发生。

// Register
event_token PlaybackRateChangeRequested(TypedEventHandler<SystemMediaTransportControls, PlaybackRateChangeRequestedEventArgs const&> const& handler) const;

// Revoke with event_token
void PlaybackRateChangeRequested(event_token const* cookie) const;

// Revoke with event_revoker
SystemMediaTransportControls::PlaybackRateChangeRequested_revoker PlaybackRateChangeRequested(auto_revoke_t, TypedEventHandler<SystemMediaTransportControls, PlaybackRateChangeRequestedEventArgs const&> const& handler) const;

public event TypedEventHandler<SystemMediaTransportControls,PlaybackRateChangeRequestedEventArgs> PlaybackRateChangeRequested;

function onPlaybackRateChangeRequested(eventArgs) { /* Your code */ }
systemMediaTransportControls.addEventListener("playbackratechangerequested", onPlaybackRateChangeRequested);
systemMediaTransportControls.removeEventListener("playbackratechangerequested", onPlaybackRateChangeRequested);
- or -
systemMediaTransportControls.onplaybackratechangerequested = onPlaybackRateChangeRequested;

Public Custom Event PlaybackRateChangeRequested As TypedEventHandler(Of SystemMediaTransportControls, PlaybackRateChangeRequestedEventArgs) 

事件类型

TypedEventHandler<SystemMediaTransportControls,PlaybackRateChangeRequestedEventArgs>

注解

注册此事件会导致 当 SystemMediaTransportControls 播放速率更改时通知应用。 应用可以根据请求更改其播放速率，也可以忽略该请求，并通过将 PlaybackRate 属性设置为反映应用的实际播放速率的值来更新 SystemMediaTransportControls。