DMDirc-Client/src/main/java/com/dmdirc/ui/CoreUIUtils.java

/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.ui;

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.MouseInfo;
import java.awt.PointerInfo;
import java.awt.Rectangle;
import java.awt.Window;

/**
 * Core UI Utilities.
 */
public final class CoreUIUtils {

    /** Prevent creation. */
    private CoreUIUtils() {
    }

    /**
     * Centre the specified window on the active monitor.
     *
     * @param window Window to centre
     */
    public static void centreWindow(final Window window) {
        // Get the Location of the mouse pointer
        final PointerInfo myPointerInfo = MouseInfo.getPointerInfo();
        if (myPointerInfo == null) {
            return;
        }
        // Get the Device (screen) the mouse pointer is on
        final GraphicsDevice myDevice = myPointerInfo.getDevice();
        if (myDevice == null) {
            return;
        }
        // Get the configuration for the device
        final GraphicsConfiguration myGraphicsConfig = myDevice.getDefaultConfiguration();
        if (myGraphicsConfig == null) {
            return;
        }
        // Get the bounds of the device
        final Rectangle gcBounds = myGraphicsConfig.getBounds();
        // Calculate the centre of the screen
        // gcBounds.x and gcBounds.y give the co ordinates where the screen
        // starts. gcBounds.width and gcBounds.height return the size in pixels
        // of the screen.
        final int xPos = gcBounds.x + ((gcBounds.width - window.getWidth()) / 2);
        final int yPos = gcBounds.y + ((gcBounds.height - window.getHeight()) / 2);
        // Set the location of the window
        window.setLocation(xPos, yPos);
    }

}