Compose desktop video player

基于JavaFx组件MediaPlayer开发，独立运行，不依赖任何其它视频播放器

代码示例

var seek by remember { mutableStateOf(0f) }                                                           
var progress by remember { mutableStateOf(Progress.ZERO) }                                            
var showLoading by remember{ mutableStateOf(false) }                                                  
var showErrorHint by remember{ mutableStateOf(false) }                                                
var videoModifier by remember { mutableStateOf(Modifier.size(DpSize.Zero)) }                          
Box(Modifier.fillMaxWidth().weight(1f).background(Color.Black), contentAlignment= Alignment.Center) {  
    progress = VideoPlayer(videoModifier, videoUrl, mediaState, volume, seek).value                   
    if(showLoading){                                                                                  
        CircularProgressIndicator(Modifier.size(80.dp), Color.White, strokeWidth = 6.dp)              
    }                                                                                                 
    if(showErrorHint){                                                                                
        Column(Modifier.clickable {                                                                   
            MainScope().launch {                                                                       
                videoUrl = ""                                                                         
                delay(500)                                                                            
                videoUrl = VIDEO_URL_LIST[videoUrlIndex]                                              
            }                                                                                         
        }, horizontalAlignment = Alignment.CenterHorizontally) {                                       
            Icon(Icons.Default.Refresh, "", Modifier.size(60.dp), tint = Color.White)                 
            Spacer(Modifier.height(16.dp))                                                            
            Text("加载失败", color=Color.White, fontSize = 18.sp)                                         
        }                                                                                             
    }                                                                                                 
}                                                                                                     
......
LaunchedEffect(mediaState.value){                            
    println("out mediaState=${mediaState.value}")           
    when (mediaState.value) {                               
        MediaState.LOADING -> {                             
            showLoading = true                              
            showErrorHint = false                           
            //由于覆盖在JavaFx组件上面的UI无法显示出来，所以先将其尺寸设置为0，等加载完成后恢复 
            videoModifier = Modifier.size(DpSize.Zero)      
        }                                                   
        MediaState.READY -> {                               
            delay(1000)                                     
            showLoading = false                             
            videoModifier = Modifier.fillMaxSize()          
        }                                                   
        MediaState.ERROR -> {                               
            showErrorHint = true                            
            showLoading = false                             
            videoModifier = Modifier.size(DpSize.Zero)      
        }                                                   
        else -> {}                                          
    }                                                       
}