在javafx中设置舞台和场景的高度和宽度

Question

• 我开发了一个javafx应用程序.
• 在我的应用程序中有两个场景和一个阶段.
• 在应用中,两个场景的高度和宽度相同或不变.
• 因此,根据我的研究,场景的高度和宽度保持不变,这在构造函数中提到但场景调整自身的高度和宽度.
• 当我在午餐应用中,舞台的高度和宽度不同于场景的恒定高度和宽度,然后场景调整.

• 但是在运行时,当我应用第二个场景时,场景不会根据舞台的高度和宽度进行调整.场景的高度和宽度保持不变.

• 那有什么办法吗？

Answer 1

这是因为除非明确指示,否则舞台会根据场景调整其大小......

这是一个解决方案:

stage.setScene(scene2);
stage.setHeight(1000);
stage.setWidth(1000);

一个示例应用程序:

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class Test extends Application {

    @Override
    public void start(final Stage stage) throws Exception {

        AnchorPane anchor1 = new AnchorPane();
        final Scene scene1 = new Scene(anchor1, 250, 250);
        Button boton1 = new Button();
        anchor1.getChildren().add(boton1);

        AnchorPane anchor2 = new AnchorPane();
        final Scene scene2 = new Scene(anchor2, 500, 500);
        Button boton2 = new Button();
        anchor2.getChildren().add(boton2);

        boton2.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                // TODO Auto-generated method stub
                stage.setScene(scene1);
                stage.setHeight(1000);
                stage.setWidth(1000);
            }
        });

        boton1.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                // TODO Auto-generated method stub
                stage.setScene(scene2);
                stage.setHeight(1000);
                stage.setWidth(1000);
            }
        });
        stage.setScene(scene1);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

Answer 2

据我了解上面发布的问题.我认为舞台足够好,可以根据听众设置首选的高度和宽度,获取更新的窗口大小请求.但它有一些限制,如果你最大化或最小化javaFX屏幕并将尝试导航到其他屏幕然后其他屏幕将具有相同的窗口大小但场景内容将扭曲到它的默认高度和宽度,例如,登录和javafx中的家庭场景(所有场景都用fxml进行处理).Login.fxml由其控制器初始化.正如您所提到的那样,场景在构造函数中初始化,因此它必须是相关fxml的控制器(截至目前FXML与控制器紧密耦合).您将在构造函数本身中设置场景大小(高度和宽度).

1.)login.fxml的LoginController

 import javafx.beans.value.ChangeListener;
    import javafx.beans.value.ObservableValue;
    import javafx.fxml.FXMLLoader;
    import javafx.scene.Parent;
    import javafx.scene.Scene;
    import javafx.stage.Stage;

    import java.io.IOException;

    class LoginController  {

        private Stage stage;
        private Scene scene;
        private Parent parent;
        @FXML  
        private Button gotoHomeButton;        

        public LoginController()  throws Exception {
            FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/login.fxml"));
            fxmlLoader.setController(this);
            try {
                parent = (Parent) fxmlLoader.load();
                // set height and width here for this login scene
                scene = new Scene(parent, 1000, 800);
            } catch (IOException ex) {
                System.out.println("Error displaying login window");
                throw new RuntimeException(ex);
            }
        }

        // create a launcher method for this. Here I am going to take like below--
        public void launchLoginScene(Stage stage) {
           this.stage = stage;
            stage.setScene(scene);
            stage.setResizable(true);

            stage.widthProperty().addListener(new ChangeListener<Number>() {
                @Override
                public void changed(ObservableValue<? extends Number> observableValue, Number number, Number number2) {
                    setCurrentWidthToStage(number2); 
                }
            });

            stage.heightProperty().addListener(new ChangeListener<Number>() {
                @Override
                public void changed(ObservableValue<? extends Number> observableValue, Number number, Number number2) {
                    setCurrentHeightToStage(number2);
                }
            });

            //Don't forget to add below code in every controller
            stage.hide();
            stage.show();

        }

         @FXML
        public void authenticateUser(ActionEvent actionEvent) { 

        // write your logic to authenticate user


         // 
         new HomeController().displayHomeScreen(stage);

        } 

        private void setCurrentWidthToStage(Number number2) {
            stage.setWidth((double) number2);
        }

        private void setCurrentHeightToStage(Number number2) {
            stage.setHeight((double) number2);
        }
    }

2.)HomeController相同 -

public class HomeController {

    private Parent parent;
    private Stage stage;
    private Scene scene;


    public HomeController (){
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/home.fxml"));
        fxmlLoader.setController(this);
        try {
             parent = (Parent) fxmlLoader.load();
                // set height and width here for this home scene
                scene = new Scene(parent, 1000, 800);
        } catch (IOException e) {
         // manage the exception
        }
    }

    public void displayHomeScreen(Stage stage){
        this.stage = stage;
        stage.setScene(scene); 

        // Must write
        stage.hide()
        stage.show();
    }
}

3.)主要课程

import javafx.application.Application;

import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        new LoginController().launchLoginScene(primaryStage);
    }


    public static void main(String[] args) {
        launch(args);
    }
}

只是尝试将Stage.show()放在每个控制器中的Stage.show()之前.我希望这会帮助你.