JavaFX编程第三小题源代码

package javaseniorprograme;

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.Slider;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.Stage;
import javafx.util.Duration;

/**
 * 16.24
 * @author ASUS
 */
public class MediaDemo extends Application{
    @Override
    public void start(Stage stage){
        // 利用目标多媒体URL来构建一个Media实例
        Media mt = new Media("file:/C:/Users/ASUS/Documents/NetBeansProjects/javaSeniorPrograme/Vex.mp4");
        MediaPlayer mp = new MediaPlayer(mt);
        MediaView mv = new MediaView(mp); 
        // 构建Label实例
        Label text1 = new Label("Time");
        Label text2 = new Label("Volume");
        Label text3 = new Label("00:00:00/00:02:27");
        Label text4 = new Label("0");
        // 构建Slider滑块控件实例
        // 用于表示视频播放进度的滑块
        Slider sld_time = new Slider();
        // 初始值为0
        sld_time.setValue(0);
        // 最大值为147，与目标多媒体大小相关
        // 147可理解为视频的总时间为147秒
        sld_time.setMax(147); 
        sld_time.setBlockIncrement(5); 
        // 通过方法构建播放按钮
        Button btn = playButton(mp,sld_time);
        /**
        * 对多媒体的currentTimeProperty添加一个监听器
        * 来实现滑块与当前时间的持续更新
        */
        mp.currentTimeProperty().addListener(e->{
                if(sld_time.getValue()==sld_time.getMax()){
                    btn.setText(">>");
                    sld_time.setValue(0); 
                    mp.seek(Duration.ZERO); 
                    mp.pause();
                }
                sld_time.setValue(Math.floor(mp.getCurrentTime().toSeconds()));
                Integer a = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())/60);
                Integer b = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())%60/10);
                Integer c = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())%60%10);
                text3.setText("00:0"+a.toString()+":"+b.toString()+c.toString()+"/00:02:27");
        });
        // 用于表示视频播放音量的滑块
        Slider sld_vol = new Slider();
        sld_vol.setValue(0);
        // 属性绑定
        mp.volumeProperty().bind(sld_vol.valueProperty().divide(10)); 
        // HBox用来布局
        HBox hbox = new HBox();
        hbox.setAlignment(Pos.CENTER);
        hbox.setPadding(new Insets(10)); 
        hbox.setSpacing(10); 
        // 添加控件
        hbox.getChildren().addAll(btn,text1,sld_time,text3,text2,sld_vol,text4);
        // BorderPane
        BorderPane pane = new BorderPane();
        pane.setCenter(mv); 
        pane.setBottom(hbox); 
        // Scene
        Scene scene = new Scene(pane,650,500);
        mv.fitHeightProperty().bind(pane.heightProperty());
        mv.fitWidthProperty().bind(pane.widthProperty());
        // 标题
        stage.setTitle("中国新说唱第九期");
        // 场景
        stage.setScene(scene);
        stage.show();
        // 播放
        mp.play();
        // 鼠标事件处理器，处理鼠标点击和鼠标拖动事件
        EventHandler<MouseEvent> action1 = new EventHandler<MouseEvent>(){
            @Override
            public void handle(MouseEvent e){
                double d = sld_time.getValue();
                mp.seek(Duration.seconds(sld_time.getValue())); 
                Integer a = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())/60);
                Integer b = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())%60/10);
                Integer c = new Integer((int)Math.floor(mp.getCurrentTime().toSeconds())%60%10);
                text3.setText("00:0"+a.toString()+":"+b.toString()+c.toString()+"/00:02:27");
            }
        };
        // 鼠标事件处理器，处理鼠标点击和鼠标拖动事件
        EventHandler<MouseEvent> action2 = new EventHandler<MouseEvent>(){
            @Override
            public void handle(MouseEvent e){
                text4.setText(new Integer((int)sld_vol.getValue()).toString());
            }
        };
        // 注册
        sld_time.setOnMouseDragged(action1);
        sld_time.setOnMouseClicked(action1);
        sld_vol.setOnMouseDragged(action2);
        sld_vol.setOnMouseClicked(action2);
    }
    // playButton方法，封装实现播放按钮的功能
    public static Button playButton(MediaPlayer mp, Slider s){
        Button btn = new Button("||");
        btn.setOnMouseClicked(e->{
            if(btn.getText().equals("||")){
                btn.setText(">>"); 
                mp.pause();
            }else{
                btn.setText("||"); 
                mp.play();
            }
        });
        return btn;
    }
    // main()方法
    public static void main(String[] args){
        Application.launch(args);
    }
}