package converter;
 
 
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
 
 
 
public class Converter extends Application {
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
    
    private final ObservableList<Unit> metricDistances;
    private final ObservableList<Unit> usaDistances;
    private final DoubleProperty meters = new SimpleDoubleProperty(1);
    
 
    public Converter() {
        //创建度量距离的Unit对象，然后使用这些Unit实例化ConversionPanel。
        metricDistances = FXCollections.observableArrayList(
                new Unit("厘米", 0.01),
                new Unit("米", 1.0),
                new Unit("千米", 1000.0));
        
        //创建美国距离的Unit对象，然后使用这些Unit实例化ConversionPanel。
        usaDistances = FXCollections.observableArrayList(
                new Unit("英寸", 0.0254),
                new Unit("英尺", 0.305),
                new Unit("码", 0.914),
                new Unit("英里", 1613.0));
    }
    
    @Override
    public void start(Stage stage) {
        VBox vbox = new VBox(
                new ConversionPanel(
                        "公制系统", metricDistances, meters),
                new ConversionPanel(
                        "美国系统", usaDistances, meters));
        Scene scene = new Scene(vbox);                
                     
        stage.setTitle("单位转换器");
        stage.setScene(scene);
        stage.show();
    }
}