/*
    * Tethys: GUI Utilities
    * Copyright 2012-2026. Tony Washer
    *
    * Licensed under the Apache License, Version 2.0 (the "License"); you may not
    * use this file except in compliance with the License.  You may obtain a copy
    * of the License at
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations under
   * the License.
   */
  package io.github.tonywasher.joceanus.tethys.javafx.dialog;
  
  import javafx.scene.Scene;
  import javafx.scene.layout.Region;
  import javafx.stage.Modality;
  import javafx.stage.Stage;
  import javafx.stage.StageStyle;
  import io.github.tonywasher.joceanus.tethys.core.dialog.TethysUICoreAboutBox;
  import io.github.tonywasher.joceanus.tethys.core.factory.TethysUICoreFactory;
  import io.github.tonywasher.joceanus.tethys.javafx.base.TethysUIFXNode;
  
  /**
   * javaFX About Box.
   */
  public class TethysUIFXAboutBox
          extends TethysUICoreAboutBox {
      /**
       * approximate width.
       */
      private static final int APPROX_WIDTH = 200;
  
      /**
       * approximate height.
       */
      private static final int APPROX_HEIGHT = 100;
  
      /**
       * The Scene register.
       */
      private final TethysUIFXSceneRegister theSceneRegister;
  
      /**
       * The underlying stage.
       */
      private final Stage theStage;
  
      /**
       * The dialog panel.
       */
      private final Region thePanel;
  
      /**
       * The dialog stage.
       */
      private Stage theDialog;
  
      /**
       * Constructor.
       *
       * @param pFactory the GUI factory
       * @param pStage   the stage
       */
      TethysUIFXAboutBox(final TethysUICoreFactory<?> pFactory,
                         final Stage pStage) {
          /* Initialise underlying class */
          super(pFactory);
          if (pStage == null) {
              throw new IllegalArgumentException("Cannot create Dialog during initialisation");
          }
  
          /* Store parameters */
          theSceneRegister = (TethysUIFXSceneRegister) pFactory;
          theStage = pStage;
          thePanel = (Region) getNode().getNode();
      }
  
      @Override
      public TethysUIFXNode getNode() {
          return (TethysUIFXNode) super.getNode();
      }
  
      @Override
      public void showDialog() {
          /* If we have not made the dialog yet */
          if (theDialog == null) {
              makeDialog();
          }
  
          /* Centre on parent */
          final double myX = (theStage.getWidth() - APPROX_WIDTH) / 2;
          final double myY = (theStage.getHeight() - APPROX_HEIGHT) / 2;
          theDialog.setX(theStage.getX() + myX);
          theDialog.setY(theStage.getY() + myY);
 
         /* Show the dialog */
         theDialog.show();
     }
 
     /**
      * Make the dialog.
      */
     private void makeDialog() {
         /* Create the dialog */
         theDialog = new Stage(StageStyle.UNDECORATED);
         theDialog.initOwner(theStage);
         theDialog.initModality(Modality.WINDOW_MODAL);
 
         /* Define style of Box */
         thePanel.getStyleClass().add("-jtethys-about");
 
         /* Create the scene and attach it */
         final Scene myScene = new Scene(thePanel);
         theSceneRegister.registerScene(myScene);
         theDialog.setScene(myScene);
     }
 
     @Override
     public void setPreferredWidth(final Integer pWidth) {
         thePanel.setPrefWidth(pWidth);
     }
 
     @Override
     public void setPreferredHeight(final Integer pHeight) {
         thePanel.setPrefHeight(pHeight);
     }
 
     @Override
     protected void closeDialog() {
         theDialog.close();
     }
 }