DJFilter.java

/*
 * 
 */
package customnodes;

import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.ArcType;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;


/**
 * The Class DJFilter.
 */
public class DJFilter extends Canvas {

	/** The background. */
	//Color background = Color.BLACK
	
	/** The arc color. */
	Color arcColor = Color.RED;
	
	/** The font. */
	private Font font = Font.font("Default", FontWeight.BOLD, 14);
	
	/** The value. */
	float value = 100;

	/** The mouse X. */
	// int
	private int mouseX = 0;
	
	/** The mouse Y. */
	private int mouseY = 0;
	
	/** The angle. */
	private int angle;

	/** The gc. */
	GraphicsContext gc = getGraphicsContext2D();

	// Constructor

	/**
	 * Instantiates a new DJ filter.
	 *
	 * @param x the x
	 * @param y the y
	 * @param width the width
	 * @param height the height
	 * @param ArcColor the arc color
	 */
	public DJFilter(int x, int y, int width, int height, Color ArcColor) {

		setLayoutX(x);
		setLayoutY(y);
		setWidth(width);
		setHeight(height);
		arcColor = ArcColor;
		setAngle(100, 200);

		// setOnMouseDragged(this::onMouseDragged)
		paintFilter();
	}

	/**
	 * Instantiates a new DJ filter.
	 *
	 * @param width the width
	 * @param height the height
	 * @param arcColor the arc color
	 */
	public DJFilter(int width, int height, Color arcColor) {

		setWidth(width);
		setHeight(height);
		this.arcColor = arcColor;
		setAngle(100, 200);

		// setOnMouseDragged(this::onMouseDragged)
		paintFilter();
	}

	/**
	 * Paint filter.
	 */
	private void paintFilter() {

		gc.clearRect(0, 0, getWidth(), getHeight());

		// Stroke Rect
		gc.setLineDashes(3);
		gc.setStroke(Color.BLACK);
		gc.strokeArc(0, -(getHeight() / 2) * 2, getWidth(), getHeight() * 2 - 1, 180, 180, ArcType.ROUND);

		// Fill Rect
		gc.setFill(arcColor);
		gc.fillArc(1, -(getHeight() / 2) * 2, getWidth() - 2, getHeight() * 2 - 1, 180, angle, ArcType.ROUND);

		// Paint the string
		gc.setFill(Color.BLACK);
		gc.setFont(font);
		value = getValue(200);
		gc.fillText(String.valueOf(value), getWidth() / 2 - 10, 20);

	}

	/**
	 * Calculates the angle of disc based on maximum value.
	 *
	 * @param maximum the maximum
	 * @return angle from 0 - 360
	 */
	public float getValue(int maximum) {
		value = (float) ((maximum * angle) / 180.00);

		if (value == 0)
			return -1.0f;
		else if (value == 100)
			return 0.0f;
		else if (value == 200)
			return 1.0f;
		else if (value < 100)
			return -(1 - value / 100f);
		else if (value > 100)
			return value / 100f - 1;

		return 0;
	}

	/**
	 * Changes the Angle of the filter.
	 *
	 * @param value the value
	 * @param maximum the maximum
	 */
	public void setAngle(int value, int maximum) {

		// Min and Max values
		if (value == 0)
			angle = 0;
		else if (value == maximum)
			angle = 180;
		else// Calculation
			angle = ((value * 180) / maximum);

		paintFilter();
	}

	/**
	 * Changes the Angle of the filter.
	 *
	 * @param value the value
	 * @param maximum the maximum
	 */
	public void setAngle(float value, int maximum) {

		if (value == -1.0f)
			angle = 0;
		else if (value == 1.0f)
			angle = 180;
		else if (value == 0.0f)
			angle = 90;
		else if (value < 0.0f)
			angle = (int) -(((value * 100) * 180) / maximum);
		else if (value > 0.0f)
			angle = (int) (((value * 100 + 100) * 180) / maximum);

		paintFilter();
	}

	/**
	 * Sets the arc color.
	 *
	 * @param color the new arc color
	 */
	public void setArcColor(Color color) {
		arcColor = color;
	}

	/**
	 * When the mouse is dragged.
	 *
	 * @param m the m
	 */
	public void onMouseDragged(MouseEvent m) {
		mouseX = (int) m.getX();
		mouseY = (int) m.getY();
		if (mouseX > getWidth() / 2)
			angle = -(int) Math.toDegrees(Math.atan2(getWidth() / 2 - mouseX, 2 - mouseY));
		else {
			angle = (int) Math.toDegrees(Math.atan2(getWidth() / 2 - mouseX, 2 - mouseY));
			angle = 360 - angle; // So it calculates it correctly
		}

		angle = 270 - angle;
		if (mouseX < 0 && mouseY < 0)
			angle = 0;
		else if (mouseX > getWidth() / 2 && mouseY < 0)
			angle = 180;

		if (angle <= 180 && angle >= 0)
			paintFilter();
	}

}