//******************************************************************************
// Circle.java:	Applet
//
//******************************************************************************
import java.applet.*;
import java.awt.*;
import ColorBars;

//==============================================================================
// Main Class for applet Circle
//
//==============================================================================
public class Circle extends Applet
{
	// PARAMETER SUPPORT:
	//		Parameters allow an HTML author to pass information to the applet;
	// the HTML author specifies them using the <PARAM> tag within the <APPLET>
	// tag.  The following variables are used to store the values of the
	// parameters.
    //--------------------------------------------------------------------------

    // Members for applet parameters
    // <type>       <MemberVar>    = <Default Value>
    //--------------------------------------------------------------------------
	private int m_r = 0;
	private int m_g = 0;
	private int m_b = 0;
	private int red = 0;
	private int green = 0;
	private int blue = 0;

	ColorBars m_bars;

    // Parameter names.  To change a name of a parameter, you need only make
	// a single change.  Simply modify the value of the parameter string below.
    //--------------------------------------------------------------------------
	private final String PARAM_r = "r";
	private final String PARAM_g = "g";
	private final String PARAM_b = "b";

	// Circle Class Constructor
	//--------------------------------------------------------------------------
	public Circle()
	{
		// TODO: Add constructor code here
	}

	// APPLET INFO SUPPORT:
	//		The getAppletInfo() method returns a string describing the applet's
	// author, copyright date, or miscellaneous information.
    //--------------------------------------------------------------------------
	public String getAppletInfo()
	{
		return "Name: Circle\r\n" +
		       "Author: Bruce Maxim\r\n" +
		       "Created with Microsoft Visual J++ Version 1.0";
	}

	// PARAMETER SUPPORT
	//		The getParameterInfo() method returns an array of strings describing
	// the parameters understood by this applet.
	//
    // Circle Parameter Information:
    //  { "Name", "Type", "Description" },
    //--------------------------------------------------------------------------
	public String[][] getParameterInfo()
	{
		String[][] info =
		{
			{ PARAM_r, "int", "Parameter description" },
			{ PARAM_g, "int", "Parameter description" },
			{ PARAM_b, "int", "Parameter description" },
		};
		return info;		
	}

	// The init() method is called by the AWT when an applet is first loaded or
	// reloaded.  Override this method to perform whatever initialization your
	// applet needs, such as initializing data structures, loading images or
	// fonts, creating frame windows, setting the layout manager, or adding UI
	// components.
    //--------------------------------------------------------------------------
	public void init()
	{
		// PARAMETER SUPPORT
		//		The following code retrieves the value of each parameter
		// specified with the <PARAM> tag and stores it in a member
		// variable.
		//----------------------------------------------------------------------
		String param;

		// r: Parameter description
		//----------------------------------------------------------------------
		param = getParameter(PARAM_r);
		if (param != null)
			m_r = Integer.parseInt(param);

		// g: Parameter description
		//----------------------------------------------------------------------
		param = getParameter(PARAM_g);
		if (param != null)
			m_g = Integer.parseInt(param);

		// b: Parameter description
		//----------------------------------------------------------------------
		param = getParameter(PARAM_b);
		if (param != null)
			m_b = Integer.parseInt(param);

        // If you use a ResourceWizard-generated "control creator" class to
        // arrange controls in your applet, you may want to call its
        // CreateControls() method from within this method. Remove the following
        // call to resize() before adding the call to CreateControls();
        // CreateControls() does its own resizing.
        //----------------------------------------------------------------------
		// resize(60, 60);
		m_bars = new ColorBars(this);
		m_bars.CreateControls();

		// TODO: Place additional initialization code here
	}

	// Place additional applet clean up code here.  destroy() is called when
	// when you applet is terminating and being unloaded.
	//-------------------------------------------------------------------------
	public void destroy()
	{
		// TODO: Place applet cleanup code here
	}

	// Circle Paint Handler
	//--------------------------------------------------------------------------
	public void paint(Graphics g)
	{
		// g.drawString("Created with Microsoft Visual J++ Version 1.0", 10, 20);
		g.setColor(new Color(m_r, m_g, m_b));
		g.fillOval(10, 10, 40, 40);
	}

	//		The start() method is called when the page containing the applet
	// first appears on the screen. The AppletWizard's initial implementation
	// of this method starts execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void start()
	{
		// TODO: Place additional applet start code here
	}
	
	//		The stop() method is called when the page containing the applet is
	// no longer on the screen. The AppletWizard's initial implementation of
	// this method stops execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void stop()
	{
	}

	// TODO: Place additional applet code here

	public void setCircleColor(int red, int green, int blue)
	{
		m_r = red;
		m_g = green;
		m_b = blue;
		repaint();
	}

	public boolean handleEvent(Event e)
	{
		if (e.target == m_bars.Red_Bar)
		{
			red = m_bars.Red_Bar.getValue();
			setCircleColor(red, green, blue);
			repaint();
		};

		if (e.target == m_bars.Green_Bar)
		{
			green = m_bars.Green_Bar.getValue();
			setCircleColor(red, green, blue);
			repaint();
		};

		if (e.target == m_bars.Blue_Bar)
		{
			blue = m_bars.Blue_Bar.getValue();
			setCircleColor(red, green, blue);
			repaint();
		};

		if (e.target == m_bars.CButton)
		{
			red = 0;
			green = 0;
			blue = 0;
			m_bars.Red_Bar.setValue(0);
			m_bars.Green_Bar.setValue(0);
			m_bars.Blue_Bar.setValue(0);
			setCircleColor(red, green, blue);
			repaint();
		}
		return true;
	}

}