我试图在屏幕中间获取一个 TextField
,同时在其周围有一个 Circle
以及圆圈下方的按钮。因此,我制作了一个带有圆圈和按钮的 VBox,以及仅带有 TextField 的 StackPane。我制作了另一个 StackPane 将 VBox 和 StackPane 放在同一场景中,但现在按钮不起作用。我真的不知道是什么原因造成的。
以下是迄今为止我的代码。
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package circleandtextbox;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
/**
*
* @author diego
*/
public class CircleAndTextBox extends Application {
@Override
public void start(Stage primaryStage) {
int programX = 400;
int programY = 400;
int circleRadius = 100;
Circle circle = new Circle(programX / 2,programY / 2,circleRadius);
circle.setStroke(Color.RED);
circle.setStrokeWidth(3);
circle.setFill(Color.TRANSPARENT);
TextField input = new TextField();
input.setMaxWidth(100);
Button btn = new Button();
btn.setText("Change the size of the circle");
btn.setOnAction((ActionEvent event) -> {
System.out.println("It worked!");
});
VBox root = new VBox();
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
root.getChildren().addAll(circle,btn);
StackPane textBox = new StackPane();
textBox.setAlignment(Pos.CENTER);
textBox.getChildren().add(input);
StackPane together = new StackPane();
together.getChildren().addAll(root,textBox);
Scene scene = new Scene(together, programX, programY);
primaryStage.setTitle("Circle code");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
最佳答案
你的第二个StackPane
覆盖了你的VBox
,隐藏了它的Button
。要查看效果,请更改
together.getChildren().addAll(root, textBox);
至
together.getChildren().addAll(textBox , root);
当然,现在 TextField
已被覆盖。相反,对圆和字段使用单个 StackPane
:
StackPane textBox = new StackPane();
textBox.setAlignment(Pos.CENTER);
textBox.getChildren().addAll(circle, input);
然后使用按钮将结果添加到 VBox
中。
VBox root = new VBox();
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
root.setPadding(new Insets(16));
root.getChildren().addAll(textBox, btn);
还可以考虑使用 Spinner
和/或 Slider
,参见 here ,控制尺寸。测试代码:
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
/**
* @author diego
* @see https://stackoverflow.com/a/64852023/230513
* @see https://stackoverflow.com/a/37935114/230513
*/
public class CircleAndTextBox extends Application {
@Override
public void start(Stage primaryStage) {
int programX = 400;
int programY = 400;
int circleRadius = 100;
Circle circle = new Circle(programX / 2,programY / 2,circleRadius);
circle.setStroke(Color.RED);
circle.setStrokeWidth(3);
circle.setFill(Color.TRANSPARENT);
TextField input = new TextField();
input.setMaxWidth(100);
Button btn = new Button();
btn.setText("Change the size of the circle");
btn.setOnAction((ActionEvent event) -> {
System.out.println("It worked!");
});
StackPane textBox = new StackPane();
textBox.setAlignment(Pos.CENTER);
textBox.getChildren().addAll(circle, input);
VBox root = new VBox();
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
root.setPadding(new Insets(16));
root.getChildren().addAll(textBox, btn);
Scene scene = new Scene(root);
primaryStage.setTitle("Circle code");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
关于java - 将 VBox 和 StackPane 放入另一个 StackPane 后按钮不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64851163/