我正在尝试创建一个JavaFX应用程序。作为其中的一部分,我必须绘制一个圆圈,如果按下按钮则会发生动画,之后我必须绘制另一个圆圈。但是在动画结束之前绘制了第二个圆圈。我试试这一段时间没有运气。任何提示都表示赞赏。
这里draw()将绘制初始圆,play()将执行动画,drawAfter()必须在play()之后发生,但它在play()完成之前发生。
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.util.Duration;
import javafx.scene.shape.Path;
import javafx.scene.shape.*;
import javafx.animation.PathTransition;
import javafx.animation.PathTransition.OrientationType;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.event.ActionEvent;
public class CircularPlay extends Application {
public static void main(String[] args) {
launch(args);
}
TextField tf=new TextField("Write a number");
Group root = new Group();
Scene scene = new Scene(root, 800, 600, Color.WHITE);
Button bt=new Button("Start");
Label label=new Label("change this");
Rectangle rect = new Rectangle (50, 50, 5, 5);
Canvas canvas = new Canvas(600, 400);
GraphicsContext gc = canvas.getGraphicsContext2D();
@Override
public void init()
{
bt.setLayoutX(650);
bt.setLayoutY(50);
label.setLayoutX(650);
label.setLayoutY(100);
rect.setArcHeight(50);
rect.setArcWidth(50);
rect.setFill(Color.VIOLET);
}
private void draw()
{
gc.strokeOval(50, 0, 100, 100);
gc.rect(1, 1, 599, 399);
gc.stroke();
}
private void drawAfter()
{
gc.strokeOval(100, 50, 100, 100);
}
private void play()
{
Path path = new Path();
path.getElements().add (new MoveTo (50, 50));
path.getElements().add (new ArcTo(50,50,90,100,100,true,true));
PathTransition pathTransition = new PathTransition();
pathTransition.setDuration(Duration.millis(2000));
pathTransition.setNode(rect);
pathTransition.setPath(path);
pathTransition.setOrientation(OrientationType.ORTHOGONAL_TO_TANGENT);
pathTransition.setCycleCount(1);
pathTransition.play();
}
@Override
public void start(Stage primaryStage)
{
primaryStage.setScene(scene);
root.getChildren().add(canvas);
root.getChildren().add(rect);
root.getChildren().add(bt);
root.getChildren().add(label);
draw();
bt.setOnAction((ActionEvent e) -> {
label.setText("Accepted");
play();
drawAfter();
});
primaryStage.show();
}
}
答案 0 :(得分:0)
您需要等到动画结束才能绘制第二个圆圈。
为此,每个动画都有一个方法:setOnFinished()
。
在您的情况下,从按钮侦听器中删除drawAfter(()
:
bt.setOnAction(e -> {
label.setText("Accepted");
play();
});
并将其添加到动画中:
private void play(){
...
PathTransition pathTransition = new PathTransition();
...
pathTransition.setOnFinished(e->drawAfter());
pathTransition.play();
}