GridsCanvas.java Source code

Introduction

Here is the source code for GridsCanvas.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS
 * 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.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.awt.Canvas;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
 * Program to draw grids.
 * 
 * @author Ian Darwin, http://www.darwinsys.com/
 */
class GridsCanvas extends Canvas {
    int width, height;

    int rows;

    int cols;

    GridsCanvas(int w, int h, int r, int c) {
        setSize(width = w, height = h);
        rows = r;
        cols = c;
    }

    public void paint(Graphics g) {
        int i;
        width = getSize().width;
        height = getSize().height;

        // draw the rows
        int rowHt = height / (rows);
        for (i = 0; i < rows; i++)
            g.drawLine(0, i * rowHt, width, i * rowHt);

        // draw the columns
        int rowWid = width / (cols);
        for (i = 0; i < cols; i++)
            g.drawLine(i * rowWid, 0, i * rowWid, height);
    }
}

/** This is the demo class. */

public class Grids extends Frame {
    /*
     * Construct a GfxDemo2 given its title, width and height. Uses a
     * GridBagLayout to make the Canvas resize properly.
     */
    Grids(String title, int w, int h, int rows, int cols) {
        setTitle(title);

        // Now create a Canvas and add it to the Frame.
        GridsCanvas xyz = new GridsCanvas(w, h, rows, cols);
        add(xyz);

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                setVisible(false);
                dispose();
                System.exit(0);
            }
        });

        // Normal end ... pack it up!
        pack();
    }

    public static void main(String[] a) {
        new Grids("Test", 300, 300, 5, 10).setVisible(true);
    }
}