org.fxmisc.richtext.demo.CloneDemo Maven / Gradle / Ivy

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package org.fxmisc.richtext.demo;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import org.fxmisc.richtext.InlineCssTextArea;

/**
 * Name: CloneDemo
 * Description: .
 * 
 * Comment: ...
 * 
 * Copyright: Copyright (c) 2016-2019
 * Company: >StA-Soft<
 * @author StA
 * @version 1.0
 */

public class CloneDemo extends Application
{

  /**
   * Main-Methode.
   * @param args Kommandozeilenparameter
   */

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

  @Override
  public void start(Stage primaryStage)
  {
    String selectedText = "selection";
    String text = "Edit the top area (original)\nand watch the (clone) bottom area's displayed text change and its " +
                    "selected text [" + selectedText + "] update itself accordingly.";
    InlineCssTextArea area = new InlineCssTextArea(text);
    InlineCssTextArea clone = new InlineCssTextArea(area.getContent());

    VBox vbox = new VBox(area, clone);
    vbox.setSpacing(10);

    // set up labels displaying caret position
    String caret = "Caret: ";
    Label areaCaret = new Label(caret);
    area.caretPositionProperty().addListener((observable, oldValue, newValue) -> areaCaret.setText(caret + String.valueOf(newValue)));
    Label cloneCaret = new Label(caret);
    clone.caretPositionProperty().addListener((observable, oldValue, newValue) -> cloneCaret.setText(caret + String.valueOf(newValue)));

    // set up label's displaying selection position
    String selection = "Selected Text: ";
    Label areaSelection = new Label(selection);
    area.selectedTextProperty().addListener(((observable, oldValue, newValue) -> areaSelection.setText(selection + newValue)));
    Label cloneSelection = new Label(selection);
    clone.selectedTextProperty().addListener(((observable, oldValue, newValue) -> cloneSelection.setText(selection + newValue)));

    // now that listeners are set up update the selection for clone
    int selectionStart = text.indexOf(selectedText);
    int selectionEnd = selectionStart + selectedText.length();
    clone.selectRange(selectionStart, selectionEnd);

    // set up Label's distinguishing which labels belong to which area.
    Label areaLabel = new Label("Original Area: ");
    Label cloneLabel = new Label("Cloned Area: ");

    // set up Buttons that programmatically change area but not clone
    Button deleteLastThreeChars = new Button("Click to Delete the previous 3 chars.");
    deleteLastThreeChars.setOnAction((ae) ->
    {
      for (int i = 0; i <= 2; i++)
      {
        area.deletePreviousChar();
      }
    });

    // finish GUI
    GridPane grid = new GridPane();
    // add area content to first row
    grid.add(areaLabel, 0, 0);
    grid.add(areaCaret, 1, 0);
    grid.add(areaSelection, 2, 0);

    // add clone content to second row
    grid.add(cloneLabel, 0, 1);
    grid.add(cloneCaret, 1, 1);
    grid.add(cloneSelection, 2, 1);

    grid.setHgap(10);
    grid.setVgap(4);

    BorderPane pane = new BorderPane();
    pane.setCenter(vbox);
    pane.setTop(grid);
    pane.setBottom(deleteLastThreeChars);

    Scene scene = new Scene(pane, 800, 500);
    primaryStage.setScene(scene);
    primaryStage.show();
  }

}