/**
 * @file         RotateDialog.java
 * @author       Robert S. Laramee
 * @version      1.0
 * @see          AutoRotate.java, NameDialog.java
 * start date    Thursday 03 Dec 98
 * "finish date" Thursday 03 Dec 98
 * <P>
 * description   This is the class that pops up the dialog box when the user
 *               uses the AutoRotate menu. It is used to adjust the rotation
 *               speed
 * modified on   Thursday 10 Dec 1998
 *               Dialog     --> JDialog
 *               Panel      --> JPanel
 *               Label      --> JLabel
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;           

class JRotateDialog extends JDialog implements AdjustmentListener {
    
    private JLabel      rotateLabel;    // rotate label
    private JScrollBar  rotate;         // rotate scrollbar
    private DrawCanvas  canvas;        // a reference to the drawing canvas

    public JRotateDialog(JFrame frame, DrawCanvas dc) {

	super(frame, "AutoRotate Dialog", false);
	canvas = dc;

	/**
	 * Create Scrollbars
	 * page 400 of Core Java
	 */
	JPanel p = new JPanel();
	p.setLayout(new GridLayout(1, 2));

	p.add(rotateLabel = new JLabel("rotate : 5  revolutions/minute"));
	p.add(rotate = new JScrollBar(JScrollBar.HORIZONTAL, 10, 0, 0, 60));
	rotate.setBlockIncrement(1);
	rotate.addAdjustmentListener(this);
	
	getContentPane().add(p, "Center");
	setSize(500, 50);  // width, height

        /**
         * bob tries to place the window in a good location
         */
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension dimension = toolkit.getScreenSize();
        int screenHeight = dimension.height;
        int screenWidth = dimension.width;
        setLocation(screenWidth/2, screenHeight/7);
    }

    public void adjustmentValueChanged(AdjustmentEvent evt) {

	if (evt.getSource() == rotate) {

	    rotateLabel.setText("rotate: " + ((rotate.getValue()+2)/2)
		                           + "  revolutions/minute");
	    Graphics g = canvas.getGraphics();
	    canvas.setSleepTime(60-rotate.getValue());
	}
    }
}