英文:
Getting the max and min out of heightProperty() and widthProperty()
问题
有没有类似于 ```Math.max(num1, num2)``` 这样的代码，但是用于比较两个 DoubleProperty？我目前正在尝试显示一个圆（继承自 Pane），它可以根据窗口的大小自动调整大小。我想尝试获取这两者之间的较小值，以设置圆的半径。```javaimport javafx.application.Application;import javafx.scene.Scene;import javafx.scene.shape.Circle;import javafx.scene.layout.Pane;import javafx.stage.Stage;public class DisplayCircle extends Application {@Overridepublic void start(Stage primaryStage) {Scene scene = new Scene(ResizableCircle(), 400, 300);primaryStage.setTitle("DisplayCircle");primaryStage.setScene(scene);primaryStage.show();}public class ResizableCircle extends Pane {public ResizableCircle() {Circle c = new Circle(getWidth()/2, getHeight()/2);c.centerXProperty().bind(widthProperty().subtract(10));c.centerYProperty().bind(heightProperty().subtract(10));// 需要帮助来设置半径并进行绑定getChildren().add(c);}}}
英文:
Is there any code, like Math.max(num1, num2) but for comparing two DoubleProperty s ?
I am currently trying to displaying a circle (that extends from Pane) that can automatically resize itself according to the size of the window. I would like to try getting the smaller value between the two for setting the radius of the circle.
import javafx.application.Application;import javafx.scene.Scene;import javafx.scene.shape.Circle;import javafx.scene.layout.Pane;import javafx.stage.Stage;public class DisplayCircle extends Application {@Overridepublic void start(Stage primaryStage) {Scene scene = new Scene(ResizableCircle(), 400, 300);primaryStage.setTitle("DisplayCircle");primaryStage.setScene(scene);primaryStage.show();}public class ResizableCircle extends Pane {public ResizableCircle() {Circle c = new Circle(getWidth()/2, getHeight()/2);c.centerXProperty().bind(widthProperty().subtract(10));c.centerYProperty().bind(heightProperty().subtract(10));// Need help setting the radius and binding itgetChildren().add(c);}}
答案1
得分: 4
你可以使用Bindings.max(ObservableNumberValue op1, ObservableNumberValue op2)和Bindings.min(ObservableNumberValue op1, ObservableNumberValue op2)将ObservableNumberValue绑定到两个其他可观察值的最大值或最小值：
DoubleProperty min = new SimpleDoubleProperty();DoubleProperty max = new SimpleDoubleProperty();min.bind(Bindings.min(widthProperty(), heightProperty()));max.bind(Bindings.max(widthProperty(), heightProperty()));
英文:
You can use Bindings.max(ObservableNumberValue op1, ObservableNumberValue op2) and Bindings.min(ObservableNumberValue op1, ObservableNumberValue op2) to bind an ObservableNumberValue to the minimum or maximum of two other observable values:
DoubleProperty min = new SimpleDoubleProperty();DoubleProperty max = new SimpleDoubleProperty();min.bind(Bindings.min(widthProperty(), heightProperty()));max.bind(Bindings.max(widthProperty(), heightProperty()));
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