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package ensemble.samples.controls.togglebutton;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.geometry.VPos;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Toggle;
import javafx.scene.control.ToggleButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

/**
 * Toggle buttons in a toggle group.
 *
 * @sampleName Toggle Button
 * @preview preview.png
 * @docUrl http://www.oracle.com/pls/topic/lookup?ctx=javase80&id=JFXUI336 Using JavaFX UI Controls
 * @see javafx.scene.control.Label
 * @see javafx.scene.control.Toggle
 * @see javafx.scene.control.ToggleButton
 * @see javafx.scene.control.ToggleGroup
 * @see javafx.scene.layout.GridPane
 * @embedded
 *
 * @related /Controls/ChoiceBox
 * @related /Controls/Accordion
 * @related /Controls/Toolbar/Tool Bar
 */
public class ToggleButtonApp extends Application {

    public Parent createContent() {
        // create label to show result of selected toggle button
        final Label label = new Label();
        label.setStyle("-fx-font-size: 2em;");
        label.setAlignment(Pos.CENTER);
        ToggleGroup group = new ToggleGroup();
        // create 3 toggle buttons and a toogle group for them
        final ToggleButton cat = new ToggleButton("Cat");
        final ToggleButton dog = new ToggleButton("Dog");
        final ToggleButton horse = new ToggleButton("Horse");
        cat.setMinSize(72, 40);
        dog.setMinSize(72, 40);
        horse.setMinSize(72, 40);
        cat.setToggleGroup(group);
        dog.setToggleGroup(group);
        horse.setToggleGroup(group);
        final ChangeListener<Toggle> changeListener =
            (ObservableValue<? extends Toggle> observable,
             Toggle oldValue, Toggle selectedToggle) -> {
                if (selectedToggle != null) {
                    label.setText(((ToggleButton) selectedToggle).getText());
                } else {
                    label.setText("...");
                }
            };
        group.selectedToggleProperty().addListener(changeListener);
        // select the first button to start with
        group.selectToggle(cat);
        // add buttons and label to grid and set their positions
        GridPane.setConstraints(cat, 0, 0);
        GridPane.setConstraints(dog, 1, 0);
        GridPane.setConstraints(horse, 2, 0);
        GridPane.setConstraints(label, 0, 1, 3, 1, HPos.CENTER, VPos.BASELINE);
        final GridPane grid = new GridPane();
        grid.setVgap(20);
        grid.setHgap(12);
        grid.getChildren().addAll(cat, dog, horse, label);
        grid.setAlignment(Pos.CENTER);
        return grid;
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setScene(new Scene(createContent()));
        primaryStage.show();
    }

    /**
     * Java main for when running without JavaFX launcher
     * @param args command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
}