アニメーションで画面遷移する奴

src_sample_controllable_animator_FadeAnimator.java

package sample.controllable.animator;

import javafx.animation.FadeTransition;
import javafx.scene.Node;
import javafx.util.Duration;
import sample.controllable.ControllablePane;
import sample.controllable.NodeTransitionAnimator;

public class FadeAnimator implements NodeTransitionAnimator {

    private int duration;
    public FadeAnimator(int duration) {
        this.duration = duration;
    }
    @Override
    public void transition(ControllablePane pane, Node before, Node after) {
        if(before != null) {
            after.setOpacity(0.0);//一瞬1.0のまま表示されるのを防ぐ
            FadeTransition fadeOut = new FadeTransition(new Duration(duration), before);
            fadeOut.setFromValue(1.0);
            fadeOut.setToValue(0.0);
            fadeOut.setOnFinished(e -> {
                pane.getChildren().remove(0);
                pane.getChildren().add(0, after);
                FadeTransition fadeIn = new FadeTransition(new Duration(duration), after);
                fadeIn.setFromValue(0.0);
                fadeIn.setToValue(1.0);
                fadeIn.play();
            });
            fadeOut.play();
        } else {
            after.setOpacity(0.0);//一瞬1.0のまま表示されるのを防ぐ
            pane.getChildren().add(after);
            FadeTransition fadeIn = new FadeTransition(new Duration(duration), after);
            fadeIn.setFromValue(0.0);
            fadeIn.setToValue(1.0);
            fadeIn.play();
        }
    }
}

src_sample_controllable_animator_NullAnimator.java

package sample.controllable.animator;

import javafx.scene.Node;
import sample.controllable.ControllablePane;
import sample.controllable.NodeTransitionAnimator;

public class NullAnimator implements NodeTransitionAnimator {

    @Override
    public void transition(ControllablePane pane, Node before, Node after) {
        if(before == null) {
            pane.getChildren().add(after);
        } else {
            pane.getChildren().remove(0);
            pane.getChildren().add(0, after);
        }
    }
}

src_sample_controllable_ControllablePane.java

package sample.controllable;

import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.layout.StackPane;
import sample.controllable.animator.NullAnimator;

import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.util.HashMap;
import java.util.Map;

public class ControllablePane extends StackPane {
    private Map<String, Node> nodes = new HashMap<>();
    private NodeTransitionAnimator animator = new NullAnimator();

    public void setAnimator(NodeTransitionAnimator animator) {
        this.animator = animator;
    }

    //FXMLをロード
    public void loadNode(String id, InputStream resource) {
        try {
            FXMLLoader loader = new FXMLLoader();
            Parent loadNode = loader.load(resource);
            Object obj = loader.getController();
            if (obj instanceof ControllablePaneController) {
                ControllablePaneController screen = (ControllablePaneController) obj;
                screen.setScreenParent(this);
            }
            nodes.put(id, loadNode);
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }

    //FXMLをアンロード
    public void unloadNode(String id) {
        nodes.remove(id);
    }

    //画面遷移
    public void setNode(String id) {
        if(nodes.get(id) == null) {
            throw new NullPointerException(id + " is not registered.");
        }

        animatePane(getChildren().isEmpty() ? null : getChildren().get(0), nodes.get(id));
    }

    //アニメーションさせる
    private void animatePane(Node before, Node after) {
        animator.transition(this, before, after);
    }
}

src_sample_controllable_ControllablePaneController.java

package sample.controllable;

public interface ControllablePaneController {
    void setScreenParent(ControllablePane controllablePane);
}

src_sample_controllable_NodeTransitionAnimator.java

package sample.controllable;

import javafx.scene.Node;

public interface NodeTransitionAnimator {
    void transition(ControllablePane pane, Node before, Node after);
}

src_sample_Controller.java

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import sample.controllable.ControllablePane;
import sample.controllable.animator.FadeAnimator;

import java.net.URL;
import java.util.ResourceBundle;

public class Controller implements Initializable {
    @FXML
    private ControllablePane controllablePane;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        controllablePane.loadNode(Screen1Controller.ID, getClass().getResourceAsStream("screen1.fxml"));
        controllablePane.loadNode(Screen2Controller.ID, getClass().getResourceAsStream("screen2.fxml"));
        controllablePane.loadNode(Screen3Controller.ID, getClass().getResourceAsStream("screen3.fxml"));
        controllablePane.setAnimator(new FadeAnimator(300));
        controllablePane.setNode(Screen1Controller.ID);
    }
}

src_sample_Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("画面遷移");
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }


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

src_sample_sample.fxml

<?import javafx.scene.layout.AnchorPane?>
<?import sample.controllable.ControllablePane?>
<AnchorPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml">
    <ControllablePane fx:id="controllablePane" prefHeight="400.0" prefWidth="600.0"/>
</AnchorPane>

src_sample_screen1.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>


<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Screen1Controller">
   <children>
      <Button onAction="#goToScreen2" layoutX="102.0" layoutY="350.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="272.0" text="画面2へ" AnchorPane.bottomAnchor="25.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Button onAction="#goToScreen3" layoutX="272.0" layoutY="278.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="326.0" text="画面3へ" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Label layoutX="285.0" layoutY="6.0" maxWidth="1.7976931348623157E308" minWidth="0.0" text="画面1" textAlignment="CENTER" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="6.0">
         <font>
            <Font size="32.0" />
         </font>
      </Label>
   </children>
</AnchorPane>

src_sample_Screen1Controller.java

package sample;

import sample.controllable.ControllablePaneController;
import sample.controllable.ControllablePane;

public class Screen1Controller implements ControllablePaneController {

    private ControllablePane controllablePane;
    public static String ID = "Screen1";

    @Override
    public void setScreenParent(ControllablePane controllablePane) {
        this.controllablePane = controllablePane;
    }

    public void goToScreen2() {
        controllablePane.setNode(Screen2Controller.ID);
    }

    public void goToScreen3() {
        controllablePane.setNode(Screen3Controller.ID);
    }
}

src_sample_screen2.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>


<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Screen2Controller">
   <children>
      <Button onAction="#goToScreen1" layoutX="102.0" layoutY="350.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="272.0" text="画面1へ" AnchorPane.bottomAnchor="25.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Button onAction="#goToScreen3" layoutX="272.0" layoutY="278.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="326.0" text="画面3へ" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Label layoutX="285.0" layoutY="6.0" maxWidth="1.7976931348623157E308" minWidth="0.0" text="画面2" textAlignment="CENTER" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="6.0">
         <font>
            <Font size="32.0" />
         </font>
      </Label>
   </children>
</AnchorPane>

src_sample_Screen2Controller.java

package sample;

import sample.controllable.ControllablePaneController;
import sample.controllable.ControllablePane;

public class Screen2Controller implements ControllablePaneController {

    private ControllablePane controllablePane;
    public static String ID = "Screen2";
    @Override
    public void setScreenParent(ControllablePane controllablePane) {
        this.controllablePane = controllablePane;
    }

    public void goToScreen1() {
        controllablePane.setNode(Screen1Controller.ID);
    }

    public void goToScreen3() {
        controllablePane.setNode(Screen3Controller.ID);
    }
}

src_sample_screen3.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>


<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Screen3Controller">
   <children>
      <Button onAction="#goToScreen1" layoutX="102.0" layoutY="350.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="272.0" text="画面1へ" AnchorPane.bottomAnchor="25.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Button onAction="#goToScreen2" layoutX="272.0" layoutY="278.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="326.0" text="画面2へ" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" />
      <Label layoutX="285.0" layoutY="6.0" maxWidth="1.7976931348623157E308" minWidth="0.0" text="画面3" textAlignment="CENTER" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="6.0">
         <font>
            <Font size="32.0" />
         </font>
      </Label>
   </children>
</AnchorPane>

src_sample_Screen3Controller.java

package sample;

import sample.controllable.ControllablePaneController;
import sample.controllable.ControllablePane;

public class Screen3Controller implements ControllablePaneController {

    private ControllablePane controllablePane;
    public static String ID = "Screen3";
    @Override
    public void setScreenParent(ControllablePane controllablePane) {
        this.controllablePane = controllablePane;
    }

    public void goToScreen1() {
        controllablePane.setNode(Screen1Controller.ID);
    }

    public void goToScreen2() {
        controllablePane.setNode(Screen2Controller.ID);
    }
}