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JCommunique is a free, open-source desktop notification library. It offers a range of features with a simple-to-use API. This is a maven repack, code is unchanged

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package com.utils;

import java.awt.Dimension;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;

import com.notification.Notification;
import com.notification.NotificationFactory.Location;

public class Screen {
	private int m_width;
	private int m_height;

	private int m_leftX;
	private int m_centerX;
	private int m_rightX;

	private int m_topY;
	private int m_centerY;
	private int m_bottomY;

	private int m_padding;

	private Screen(boolean spanMultipleMonitors, int padding) {
		m_padding = padding;
		setupDimensions(spanMultipleMonitors);
		calculatePositions();
	}

	public static Screen standard() {
		return new Screen(true, 80);
	}

	public static Screen withSpan(boolean spanMultipleMonitors) {
		return new Screen(spanMultipleMonitors, 80);
	}

	public static Screen withPadding(int padding) {
		return new Screen(true, padding);
	}

	public static Screen withSpanAndPadding(boolean spanMultipleMonitors, int padding) {
		return new Screen(spanMultipleMonitors, padding);
	}

	private void setupDimensions(boolean spanMultipleMonitors) {
		if (spanMultipleMonitors) {
			Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
			m_width = screenSize.width;
			m_height = screenSize.height;

		} else {
			GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
			m_width = gd.getDisplayMode().getWidth();
			m_height = gd.getDisplayMode().getHeight();
		}
	}

	private void calculatePositions() {
		m_leftX = m_padding;
		m_centerX = (int) (m_width / 2d);
		m_rightX = m_width - m_padding;

		m_topY = m_padding;
		m_centerY = (int) (m_height / 2d);
		m_bottomY = m_height - m_padding;
	}

	public int getX(Location loc, Notification note) {
		switch (loc) {
		case SOUTHWEST:
			return m_leftX;
		case WEST:
			return m_leftX;
		case NORTHWEST:
			return m_leftX;
		case NORTH:
			return m_centerX - note.getWidth() / 2;
		case SOUTH:
			return m_centerX - note.getWidth() / 2;
		case SOUTHEAST:
			return m_rightX - note.getWidth();
		case EAST:
			return m_rightX - note.getWidth();
		case NORTHEAST:
			return m_rightX - note.getWidth();
		default:
			return -1;
		}
	}

	public int getY(Location loc, Notification note) {
		switch (loc) {
		case SOUTHWEST:
			return m_bottomY - note.getHeight();
		case WEST:
			return m_centerY - note.getHeight() / 2;
		case NORTHWEST:
			return m_topY;
		case NORTH:
			return m_topY;
		case SOUTH:
			return m_bottomY - note.getHeight();
		case SOUTHEAST:
			return m_bottomY - note.getHeight();
		case EAST:
			return m_centerY - note.getHeight() / 2;
		case NORTHEAST:
			return m_topY;
		default:
			return -1;
		}
	}

	public int getPadding() {
		return m_padding;
	}
}