//////////////////////////////////////////////////////////////////////////////
//                        DX SOURCEFILE					    //
//////////////////////////////////////////////////////////////////////////////

/*
 * $Header: /home/gda/dxcvs/dx/src/ui++/java/dx/runtime/ArrowButton.java,v 1.1.1.1 1999/03/24 15:17:32 gda Exp $
 */
package dx.runtime;
import java.awt.*;

//
//

public class ArrowButton extends Canvas {
    //
    // private
    //
    static private int OUT = 1;
    static private int IN = 2;
    private int direction;
    private int state = OUT;
    private Stepper stepper;

    static public int LEFT = 1;
    static public int RIGHT = 2;

public ArrowButton(int dir, Stepper step)
{
    direction = dir;
    stepper = step;
}

public boolean handleEvent(Event e)
{
    if (e.id == Event.MOUSE_DOWN) {
	state = IN;
	repaint();
	return true;
    } else if (e.id == Event.MOUSE_UP) {
	if (state == IN) {
	    if (changeValue())
		stepper.callCallback(this);
	}
	state = OUT;
	repaint();
	return true;
    }
    return false;
}

private boolean changeValue()
{
    if (direction == LEFT)
	return stepper.decrement();
    else
	return stepper.increment();
}

public Dimension preferredSize()
{
    return new Dimension (20,20);
}

public Dimension minimumSize()
{
    return new Dimension (15,15);
}

public void paint(Graphics g)
{
    Dimension d = size();
    Color ts = Color.white;
    Color bs = Color.black;
    Color last;

    int x1,x2,x3;
    int y1,y2,y3;

    if (direction == LEFT) {
	x1 = 4;
	x2 = d.width-1;
	y3 = d.height-5;
	x3 = x2;
	y1 = d.height>>1;
	y2 = 4;
	last = (state==OUT?bs:ts);
    } else {
	x1 = 0;
	x2 = d.width-5;
	y3 = d.height-5;
	x3 = 0;
	y1 = 4;
	y2 = d.height>>1;
	last = (state==OUT?ts:bs);
    }
    int xPoints[] = new int[3];
    xPoints[0] = x1;
    xPoints[1] = x2;
    xPoints[2] = x3;
    int yPoints[] = new int[3];
    yPoints[0] = y1;
    yPoints[1] = y2;
    yPoints[2] = y3;
    g.setColor(new Color(0xbb, 0xbb, 0xbb));
    g.fillPolygon(xPoints, yPoints, 3);

    g.setColor((state==OUT?ts:bs));
    g.drawLine (x1,y1, x2,y2);
    g.setColor((state==OUT?bs:ts));
    g.drawLine (x2,y2, x3,y3);
    g.setColor(last);
    g.drawLine (x3,y3, x1,y1);

}

} // end ArrowButton