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High quality UI controls and other tools to complement the core JavaFX distribution
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/**
 * Copyright (c) 2014, 2015 ControlsFX
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of ControlsFX, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package impl.org.controlsfx.skin;

import static javafx.scene.input.MouseEvent.MOUSE_PRESSED;
import static javafx.scene.input.MouseEvent.MOUSE_RELEASED;
import javafx.animation.AnimationTimer;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.geometry.Orientation;
import javafx.scene.control.SkinBase;
import javafx.scene.control.Slider;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Region;
import javafx.util.Duration;

import org.controlsfx.control.PlusMinusSlider;
import org.controlsfx.control.PlusMinusSlider.PlusMinusEvent;

public class PlusMinusSliderSkin extends SkinBase {
    
	private SliderReader reader;

	private Slider slider;

	private Region plusRegion;

	private Region minusRegion;

	private BorderPane borderPane;

	public PlusMinusSliderSkin(PlusMinusSlider adjuster) {
		super(adjuster);

		/*
		 * We are not supporting any key events, yet. Adding this filter makes
		 * sure the user doesn't use the standard key bindings of the slider. In
		 * that case the thumb would not move itself back automatically (e.g.
		 * after pressing "arrow right").
		 */
		adjuster.addEventFilter(KeyEvent.ANY, new EventHandler() {
			@Override
			public void handle(KeyEvent event) {
				event.consume();
			}
		});

		slider = new Slider(-1, 1, 0);

		slider.valueProperty().addListener(new ChangeListener() {
			@Override
			public void changed(ObservableValue observable,
					Number oldValue, Number newValue) {
				getSkinnable().getProperties().put("plusminusslidervalue", //$NON-NLS-1$
						newValue.doubleValue());
			}
		});

		slider.orientationProperty().bind(adjuster.orientationProperty());

		slider.addEventHandler(MOUSE_PRESSED, new EventHandler() {

			@Override
			public void handle(MouseEvent evt) {
				reader = new SliderReader();
				reader.start();
			}
		});

		slider.addEventHandler(MOUSE_RELEASED, new EventHandler() {

			@Override
			public void handle(MouseEvent evt) {
				if (reader != null) {
					reader.stop();
				}

				KeyValue keyValue = new KeyValue(slider.valueProperty(), 0);
				KeyFrame keyFrame = new KeyFrame(Duration.millis(100), keyValue);
				Timeline timeline = new Timeline(keyFrame);
				timeline.play();
			}
		});

		plusRegion = new Region();
		plusRegion.getStyleClass().add("adjust-plus"); //$NON-NLS-1$

		minusRegion = new Region();
		minusRegion.getStyleClass().add("adjust-minus"); //$NON-NLS-1$

		borderPane = new BorderPane();

		updateLayout(adjuster.getOrientation());

		getChildren().add(borderPane);

		adjuster.orientationProperty().addListener((observable, oldValue, newValue) -> updateLayout(newValue));
	}

	private void updateLayout(Orientation orientation) {
		borderPane.getChildren().clear();

		switch (orientation) {
		case HORIZONTAL:
			borderPane.setLeft(minusRegion);
			borderPane.setCenter(slider);
			borderPane.setRight(plusRegion);
			break;
		case VERTICAL:
			borderPane.setTop(plusRegion);
			borderPane.setCenter(slider);
			borderPane.setBottom(minusRegion);
			break;
		}
	}

	class SliderReader extends AnimationTimer {
		private long lastTime = System.currentTimeMillis();

		@Override
		public void handle(long now) {
			// max speed: 100 hundred times per second
			if (now - lastTime > 10000000) {
				lastTime = now;
				slider.fireEvent(new PlusMinusEvent(slider, slider,
						PlusMinusEvent.VALUE_CHANGED, slider.getValue()));
			}
		}
	}
}