JavaFXでダイアログを作成するサンプル

ConfirmDialog.fxml

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<?import javafx.scene.text.*?>

<GridPane hgap="14.0" maxHeight="+Infinity" maxWidth="+Infinity" minHeight="-Infinity" minWidth="-Infinity" vgap="20.0" xmlns:fx="http://javafx.com/fxml" fx:controller="aoetk.dialogsample.ConfirmDialogController">
  <children>
    <ImageView fitHeight="60.0" fitWidth="60.0" pickOnBounds="true" preserveRatio="true" GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="0" GridPane.valignment="TOP">
      <image>
        <Image url="@confirm.png" />
        <!-- place holder -->
      </image>
    </ImageView>
    <VBox alignment="CENTER_LEFT" maxHeight="+Infinity" maxWidth="+Infinity" minHeight="-Infinity" prefWidth="400.0" spacing="7.0" GridPane.columnIndex="1" GridPane.rowIndex="0" GridPane.valignment="CENTER">
      <children>
        <Label fx:id="detailsLabel" text="message" textAlignment="LEFT" wrapText="true">
          <font>
            <Font name="HGPGothicE" size="13.0" />
          </font>
        </Label>
      </children>
    </VBox>
    <HBox maxHeight="-Infinity" maxWidth="+Infinity" minHeight="-Infinity" minWidth="-Infinity" prefWidth="300.0" GridPane.columnIndex="1" GridPane.rowIndex="1">
      <children>
        <HBox id="HBox" alignment="CENTER">
          <children>
            <Button id="btnCancel" cancelButton="true" mnemonicParsing="false" onAction="#handleBtnCancelAction" text="Cancel" HBox.hgrow="NEVER">
              <HBox.margin>
                <Insets right="14.0" />
              </HBox.margin>
            </Button>
          </children>
          <HBox.margin>
            <Insets />
          </HBox.margin>
        </HBox>
        <Pane maxWidth="+Infinity" HBox.hgrow="ALWAYS" />
        <Button id="btnNo" cancelButton="false" minWidth="80.0" mnemonicParsing="false" onAction="#handleBtnNoAction" text="No" HBox.hgrow="NEVER">
          <HBox.margin>
            <Insets />
          </HBox.margin>
        </Button>
        <HBox id="HBox" alignment="CENTER">
          <children>
            <Button id="btnYes" defaultButton="true" minWidth="80.0" mnemonicParsing="false" onAction="#handleBtnYesAction" text="Yes" HBox.hgrow="NEVER">
              <HBox.margin>
                <Insets left="14.0" />
              </HBox.margin>
            </Button>
          </children>
        </HBox>
      </children>
    </HBox>
  </children>
  <columnConstraints>
    <ColumnConstraints hgrow="NEVER" maxWidth="-Infinity" minWidth="-Infinity" />
    <ColumnConstraints halignment="CENTER" hgrow="ALWAYS" maxWidth="+Infinity" minWidth="-Infinity" />
  </columnConstraints>
  <padding>
    <Insets bottom="14.0" left="14.0" right="14.0" top="14.0" />
  </padding>
  <rowConstraints>
    <RowConstraints maxHeight="+Infinity" minHeight="-Infinity" valignment="CENTER" vgrow="ALWAYS" />
    <RowConstraints maxHeight="-Infinity" minHeight="-Infinity" vgrow="NEVER" />
  </rowConstraints>
</GridPane>

ConfirmDialogController.java

package aoetk.dialogsample;

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

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.stage.Window;

/**
 * 確認ダイアログのコントローラー.
 *
 * @author aoetk
 */
public class ConfirmDialogController implements Initializable {

    @FXML
    private Label detailsLabel;

    private DialogOption selectedOption = DialogOption.CANCEL;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
    }

    public DialogOption getSelectedOption() {
        return selectedOption;
    }

    public void setMessage(String msg) {
        detailsLabel.setText(msg);
    }

    @FXML
    void handleBtnYesAction(ActionEvent event) {
        handleCloseAction(DialogOption.YES);
    }

    @FXML
    void handleBtnNoAction(ActionEvent event) {
        handleCloseAction(DialogOption.NO);
    }

    @FXML
    void handleBtnCancelAction(ActionEvent event) {
        handleCloseAction(DialogOption.CANCEL);
    }

    private void handleCloseAction(DialogOption selectedOption) {
        this.selectedOption = selectedOption;
        getWindow().hide();
    }

    private Window getWindow() {
        return detailsLabel.getScene().getWindow();
    }

}

DialogOption.java

package aoetk.dialogsample;

/**
 * ダイアログのオプション定義.
 * @author aoetk
 */
public enum DialogOption {
    YES, NO, CANCEL;
}

DialogSample.java

package aoetk.dialogsample;

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

/**
 * ダイアログサンプル.
 * @author aoetk
 */
public class DialogSample extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("DialogSampleView.fxml"));
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.setTitle("Dialog Sample");
        stage.show();
    }

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

}

DialogSampleView.fxml

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

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

<AnchorPane id="AnchorPane" prefHeight="200.0" prefWidth="320.0" xmlns:fx="http://javafx.com/fxml" fx:controller="aoetk.dialogsample.DialogSampleViewController">
  <children>
    <Button fx:id="button" layoutX="97.0" layoutY="84.0" onAction="#handleButtonAction" text="ダイアログを開く" />
  </children>
</AnchorPane>

DialogSampleViewController.java

package aoetk.dialogsample;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

/**
 * 初期ウィンドウのコントローラー.
 * @author aoetk
 */
public class DialogSampleViewController implements Initializable {

    @FXML
    Button button;

    @FXML
    private void handleButtonAction(ActionEvent event) {
        try {
            // 確認ダイアログの表示
            FXMLLoader loader = new FXMLLoader(getClass().getResource("ConfirmDialog.fxml"));
            loader.load();
            Parent root = loader.getRoot();
            ConfirmDialogController controller = loader.getController();
            controller.setMessage("今日の外の天気は晴れですか？");
            Scene scene = new Scene(root);
            Stage confirmDialog = new Stage(StageStyle.UTILITY);
            confirmDialog.setScene(scene);
            confirmDialog.initOwner(button.getScene().getWindow());
            confirmDialog.initModality(Modality.WINDOW_MODAL);
            confirmDialog.setResizable(false);
            confirmDialog.setTitle("Select an Option");
            confirmDialog.showAndWait(); // ダイアログが閉じるまでブロックされる

            // 確認ダイアログの選択結果に応じたメッセージダイアログの表示
            switch (controller.getSelectedOption()) {
            case YES:
                showMessageDialog("コンピュータで遊んでないで外に出よう。\nビーチに行って太陽の日を浴びたらどうでしょう。");
                break;
            case NO:
                showMessageDialog("屋内にいて様々なものから保護されているのはいいことです。");
                break;
            }

        } catch (IOException ex) {
            Logger.getLogger(DialogSampleViewController.class.getName()).
                    log(Level.SEVERE, "読み込み失敗", ex);
        }
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
    }

    private void showMessageDialog(String msg) throws IOException {
        FXMLLoader loader = new FXMLLoader(getClass().getResource("MessageDialog.fxml"));
        loader.load();
        Parent root = loader.getRoot();
        MessageDialogController controller = loader.getController();
        controller.setMessage(msg);
        Scene scene = new Scene(root);
        Stage messageDialog = new Stage(StageStyle.UTILITY);
        messageDialog.setScene(scene);
        messageDialog.initOwner(button.getScene().getWindow());
        messageDialog.initModality(Modality.WINDOW_MODAL);
        messageDialog.setResizable(false);
        messageDialog.setTitle("Message");
        messageDialog.show();
    }

}

MessageDialog.fxml

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<?import javafx.scene.text.*?>

<GridPane hgap="14.0" maxHeight="+Infinity" maxWidth="+Infinity" minHeight="-Infinity" minWidth="-Infinity" vgap="20.0" xmlns:fx="http://javafx.com/fxml" fx:controller="aoetk.dialogsample.MessageDialogController">
  <children>
    <ImageView fitHeight="60.0" fitWidth="60.0" pickOnBounds="true" preserveRatio="true" GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="0" GridPane.valignment="TOP">
      <image>
        <Image url="file:/Users/aoetakashi/NetBeansProjects/DialogSample/src/aoetk/dialogsample/inform.png" />
        <!-- place holder -->
      </image>
    </ImageView>
    <VBox alignment="CENTER_LEFT" maxHeight="+Infinity" maxWidth="+Infinity" minHeight="-Infinity" prefWidth="400.0" spacing="7.0" GridPane.columnIndex="1" GridPane.rowIndex="0">
      <children>
        <Label fx:id="detailsLabel" text="message" textAlignment="LEFT" wrapText="true">
          <font>
            <Font name="HGGothicE" size="13.0" />
          </font>
        </Label>
      </children>
    </VBox>
    <HBox maxHeight="-Infinity" maxWidth="+Infinity" minHeight="-Infinity" minWidth="-Infinity" GridPane.columnIndex="1" GridPane.rowIndex="1">
      <children>
        <Pane maxWidth="+Infinity" HBox.hgrow="ALWAYS" />
        <HBox id="HBox" alignment="CENTER">
          <children>
            <Button id="okButton" defaultButton="true" minWidth="80.0" mnemonicParsing="false" onAction="#handleBtnOkAction" text="Ok" HBox.hgrow="NEVER">
              <HBox.margin>
                <Insets left="14.0" />
              </HBox.margin>
            </Button>
          </children>
        </HBox>
      </children>
    </HBox>
  </children>
  <columnConstraints>
    <ColumnConstraints hgrow="NEVER" maxWidth="-Infinity" minWidth="-Infinity" />
    <ColumnConstraints halignment="CENTER" hgrow="ALWAYS" maxWidth="+Infinity" minWidth="-Infinity" />
  </columnConstraints>
  <padding>
    <Insets bottom="14.0" left="14.0" right="14.0" top="14.0" />
  </padding>
  <rowConstraints>
    <RowConstraints maxHeight="+Infinity" minHeight="-Infinity" valignment="CENTER" vgrow="ALWAYS" />
    <RowConstraints maxHeight="-Infinity" minHeight="-Infinity" vgrow="NEVER" />
  </rowConstraints>
</GridPane>

MessageDialogController.java

package aoetk.dialogsample;

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

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.stage.Window;

/**
 * メッセージダイアログのコントローラー.
 *
 * @author aoetk
 */
public class MessageDialogController implements Initializable {

    @FXML
    private Label detailsLabel;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
    }

    public void setMessage(String msg) {
        detailsLabel.setText(msg);
    }

    @FXML
    void handleBtnOkAction(ActionEvent event) {
        getWindow().hide();
    }

    private Window getWindow() {
        return detailsLabel.getScene().getWindow();
    }

}