JavaFX:将TableView列与另一个TableView的行数绑定

Question

我有一个带有“名称”列和“车道数”列的道路表视图。车道数显示一个整数，即道路的车道数。添加新道路时，我有另一个 TableView，在其中设置车道的属性。我的车道类是：

public class Lane {

    private StringProperty name;

    private FloatProperty width;

    private BooleanProperty normalDirection;

    public Lane(String name, float width, boolean normalDirection) {
        this.name = new SimpleStringProperty(name);
        this.width = new SimpleFloatProperty(width);
        this.normalDirection = new SimpleBooleanProperty(normalDirection);
    }

    public void setName(String value) { 
        nameProperty().set(value); 
    }

    public String getName() { 
        return nameProperty().get();
    }

    public StringProperty nameProperty() { 
        if (name == null) {
            name = new SimpleStringProperty(this, "name");
        }
        return name; 
    }

    public void setWidth(float value) { 
        widthProperty().set(value); 
    }

    public float getWidth() { 
        return widthProperty().get();
    }

    public FloatProperty widthProperty() { 
        if (width == null) {
            width = new SimpleFloatProperty(this, "width");
        }
        return width; 
    }

    public void setNormalDirection(boolean value) { 
        normalDirectionProperty().set(value);
    }

    public boolean getNormalDirection() { 
        return normalDirectionProperty().get();
    }

    public BooleanProperty normalDirectionProperty() { 
        if (normalDirection == null) normalDirection = new SimpleBooleanProperty(this, "normalDirection");
        return normalDirection; 
    } 
}

我正在尝试创建一个类Road，我想在其中绑定一个属性私有整数属性编号的Lanes与观察列表的大小

我是JavaFX世界的新手，感谢任何帮助。感谢高级。




Answer 1

您是否正在寻找类似以下内容：

public class Road {
   private final ObservableList<Lane> lanes = FXCollections.observableArrayList();
   public final ObservableList<Lane> getLanes() {
      return lanes ;
   }

   private final ReadOnlyIntegerWrapper numberOfLanes = new ReadOnlyIntegerWrapper(this, "numberOfLanes");
   public final int getNumberOfLanes() {
      return numberOfLanes.get();
   }
   public ReadOnlyIntegerProperty numberOfLanesProperty() {
      return numberOfLanes.getReadOnlyProperty();
   }

   public Road() {
      numberOfLanes.bind(Bindings.size(lanes));
   }
}