英文:
Halt JavaFX program until after Transition is complete
问题
以下是您要求的翻译内容:
我正在制作一个使用多个 TranslateTransition
的 JavaFX 程序,以将多个 Node
在 Pane
中移动。我希望程序在转换完成之后暂停执行。
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Stack Overflow MRE");
Pane root = new Pane();
Rectangle rect1 = new Rectangle(25, 100, Color.AQUA);
rect1.setX(10);
rect1.setY(10);
Rectangle rect2 = new Rectangle(25, 100, Color.BISQUE);
rect2.setX(465);
rect2.setY(10);
root.getChildren().addAll(rect1, rect2);
primaryStage.setScene(new Scene(root, 500, 500));
primaryStage.show();
for (int i = 0; i < 10; i++) {
if (i == 0) {
TranslateTransition translateRect1 = new TranslateTransition();
translateRect1.setNode(rect1);
translateRect1.setAutoReverse(true);
translateRect1.setCycleCount(1);
translateRect1.setToY(350);
translateRect1.setDuration(Duration.millis(5000));
translateRect1.play();
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.play();
// 等待转换完成
translateRect1.setOnFinished(event -> {
// 继续执行剩余代码
System.out.printf("当前迭代为 %s\n", i);
});
}
}
}
public static void main(String[] args) {
launch(args);
}
}
在上述代码示例中,两个转换同时发生,这是我想要的,然而循环在转换完成之前就继续执行了。我希望循环在转换完成之前暂停,然后再继续执行下一次迭代。我应该如何让程序在继续执行剩余代码之前先完成转换呢?
英文:
I am making a JavaFX program that uses multiple TranslateTransition
s to move multiple Node
s across a Pane
. I want the program to halt execution until after the transitions are complete.
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Stack Overflow MRE");
Pane root = new Pane();
Rectangle rect1 = new Rectangle(25, 100, Color.AQUA);
rect1.setX(10);
rect1.setY(10);
Rectangle rect2 = new Rectangle(25, 100, Color.BISQUE);
rect2.setX(465);
rect2.setY(10);
root.getChildren().addAll(rect1, rect2);
primaryStage.setScene(new Scene(root, 500, 500));
primaryStage.show();
for (int i = 0; i < 10; i++) {
if (i == 0) {
TranslateTransition translateRect1 = new TranslateTransition();
translateRect1.setNode(rect1);
translateRect1.setAutoReverse(true);
translateRect1.setCycleCount(1);
translateRect1.setToY(350);
translateRect1.setDuration(Duration.millis(5000));
translateRect1.play();
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.play();
}
// The loop will continue iterating while the above transitions are still running
// I need the loop to pause until they complete
System.out.printf("The current iteration is %s\n", i);
}
}
public static void main(String[] args) {
launch(args);
}
}
In the above code sample, the two transitions occur simultaneously, which is what I want, however the loop continues before the transitions complete. I want the loop to pause until the transitions are complete, and then move on to the next iterations. How would I get the program to first complete the transitions before moving on to the rest of the code?
答案1
得分: 2
只需为您想要执行代码的过渡添加一个 onFinished
处理程序,例如:
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.setOnFinished(e -> {
System.out.println("测试输出的时机");
});
translateRect2.play();
// 此行在上述过渡仍在运行时打印
// System.out.println("测试输出的时机");
您编辑后的问题的解决方案本质上是相同的:以明显的方式进行重构,以便您想要在过渡之后运行的代码位于 onFinished
处理程序中:
TranslateTransition translateRect1 = new TranslateTransition();
translateRect1.setNode(rect1);
translateRect1.setAutoReverse(true);
translateRect1.setCycleCount(1);
translateRect1.setToY(350);
translateRect1.setDuration(Duration.millis(5000));
translateRect1.play();
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.setOnFinished(e -> {
for (int i = 1; i < 10; i++) {
System.out.printf("当前迭代次数为 %s\n", i);
}
});
translateRect2.play();
System.out.printf("当前迭代次数为 0\n");
英文:
Just use an onFinished
handler for the transition after which you want the code to execute, e.g.
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.setOnFinished(e -> {
System.out.println("Testing timing of output");
});
translateRect2.play();
// This line prints while the above transitions are still running
// System.out.println("Testing timing of output");
The solution for your edited question is essentially the same: refactor it in the obvious way so that the code that you want to run after the transitions is in the onFinished
handler:
TranslateTransition translateRect1 = new TranslateTransition();
translateRect1.setNode(rect1);
translateRect1.setAutoReverse(true);
translateRect1.setCycleCount(1);
translateRect1.setToY(350);
translateRect1.setDuration(Duration.millis(5000));
translateRect1.play();
TranslateTransition translateRect2 = new TranslateTransition();
translateRect2.setNode(rect2);
translateRect2.setAutoReverse(true);
translateRect2.setCycleCount(1);
translateRect2.setToY(350);
translateRect2.setDuration(Duration.millis(5000));
translateRect2.setOnFinished(e -> {
for (int i = 1; i < 10; i++) {
System.out.printf("The current iteration is %s\n", i);
}
});
translateRect2.play();
System.out.printf("The current iteration is 0\n");
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