QuadrantIcon.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.test.uitools;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;

/**
 * An icon that is useful for testing.
 */
public class QuadrantIcon implements Icon {
    private final Color color;

    private final int width;
    private final int widthOffset;
    private final int widthMiddle;

    private final int height;
    private final int heightOffset;
    private final int heightMiddle;


    /**
     * Construct an icon that will paint a Four Square with
     * the specified settings.
     */
    public QuadrantIcon(Color color, int width, int height) {
        super();
        this.color = color;

        this.width = width;
        this.widthOffset = width - 1;
        this.widthMiddle = width >> 1;

        this.height = height;
        this.heightOffset = height - 1;
        this.heightMiddle = height >> 1;
    }

    /**
     * Construct an icon that will paint a Four Square of the specified size.
     */
    public QuadrantIcon(int width, int height) {
        this(Color.BLACK, width, height);
    }

    /**
     * Construct an icon that will paint a Four Square of the specified size.
     */
    public QuadrantIcon(Color color, int size) {
        this(color, size, size);
    }

    /**
     * Construct an icon that will paint a Four Square of the specified size.
     */
    public QuadrantIcon(int size) {
        this(Color.BLACK, size);
    }


    /**
     * @see javax.swing.Icon#paintIcon(java.awt.Component, java.awt.Graphics, int, int)
     */
    public void paintIcon(Component c, Graphics g, int x, int y) {
        int x_off = x + this.widthOffset;
        int x_mid = x + this.widthMiddle;
        int y_off = y + this.heightOffset;
        int y_mid = y + this.heightMiddle;
        Color savedColor = g.getColor();

        g.setColor(this.color);

        // draw a square around the entire icon
        g.drawLine(x, y, x_off, y);        // top (left to right)
        g.drawLine(x_off, y + 1, x_off, y_off);        // right (top to bottom)
        g.drawLine(x_off - 1, y_off, x, y_off);        // bottom (right to left)
        g.drawLine(x, y_off - 1, x, y + 1);        // left (bottom to top)

        // draw crosshairs
        g.drawLine(x_mid, y + 1, x_mid, y_off - 1);        // vertical (top to bottom)
        g.drawLine(x + 1, y_mid, x_off - 1, y_mid);        // horizontal (left to right)
        if ((this.width & 1) == 0) {        // if width is even
            // draw a second line if there is not a true middle line
            g.drawLine(x_mid - 1, y + 1, x_mid - 1, y_off - 1);        // vertical (top to bottom)
        }
        if ((this.height & 1) == 0) {        // if height is even
            // draw a second line if there is not a true middle line
            g.drawLine(x + 1, y_mid - 1, x_off - 1, y_mid - 1);        // horizontal (left to right)
        }

        g.setColor(savedColor);
    }

    /**
     * @see javax.swing.Icon#getIconWidth()
     */
    public int getIconWidth() {
        return this.width;
    }

    /**
     * @see javax.swing.Icon#getIconHeight()
     */
    public int getIconHeight() {
        return this.height;
    }

}