/*-------------------------------------------------------------------*
 * NTU Student: Java With Engineering Applications, Spring 1999
 * Assignment # 5 - Java How To Program 2nd edition, Deitel & Deitel
 * Problem 11.16 on page 647 - CLASS Scroll: applet created to 
 * practice Scroll bars and the AdjustmentListener techniques.
 *
 * Michael Kusmierz
 * Xerox Corporation
 * Rev 1.0	May 14, 1999 
 *
 * This code represents a students work in progress 
 * and is not to be used beyond that purpose.
 *-------------------------------------------------------------------*/ 

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/**
 * This type was created in VisualAge.
 */
public class Scroll extends Applet implements AdjustmentListener {
	private Label ivjLabel1 = null;
	private Scrollbar ivjScrollbar1 = null;
	private Scrollbar ivjScrollbar2 = null;
	private Scrollbar ivjScrollbar3 = null;
	private TextField ivjTextField1 = null;
	private TextField ivjTextField2 = null;
	private TextField ivjTextField3 = null;
	private Label ivjLabel2 = null;
	private Label ivjLabel3 = null;
	private Label ivjLabel4 = null;
/*************************
* ADJUSTMENT VALUE CHANGED - called by AdjustmentListener upon adjustment event 
* from the scroll bar
*
*/

public void adjustmentValueChanged( AdjustmentEvent e ) {
		Color colorObj;
		colorObj = new Color(0,0,0);
		int intR =0, intG =0, intB = 0;

		
		//--- used a graphics object instead of paint
		Graphics gObj = this.getGraphics();
		gObj.drawRect(48,48,354,77);
		
		//--- Capture scrollbar changes and reflect them in text boxes		
		if (e.getSource() == ivjScrollbar1)
		{
			showStatus("Red Adjustment");
			intR =  ivjScrollbar1.getValue();
			//---FIX scrollbar max - errors due to Java VM versions  
			if (intR >255) intR = 255;
			ivjTextField1.setText( Integer.toString(intR) );
			colorObj = new Color( intR ,0,0);
			ivjTextField1.setBackground( colorObj );
		}	
		else if	(e.getSource() == ivjScrollbar2)
		{
			showStatus("Green Adjustment");
			intG =  ivjScrollbar2.getValue();
			//---FIX scrollbar max - errors due to Java VM versions
			if (intG >255) intG = 255;
			ivjTextField2.setText( Integer.toString(intG) );
			
			colorObj = new Color(0,ivjScrollbar2.getValue(),0);
			ivjTextField2.setBackground( colorObj );
		}	
		else if (e.getSource() == ivjScrollbar3)
		{
			showStatus("Blue Adjustment");
			intB =  ivjScrollbar3.getValue();
			//---FIX scrollbar max - errors due to Java VM versions
			if (intB >255) intB = 255;
			ivjTextField3.setText( Integer.toString(intB) );
			
			colorObj = new Color(0,0,ivjScrollbar3.getValue());
			ivjTextField3.setBackground( colorObj );
		}

		//--- don't forget to fill the rectangle with the color form the textbox's

		colorObj = new Color(ivjScrollbar1.getValue(),ivjScrollbar2.getValue()
				,ivjScrollbar3.getValue());	
		gObj.setColor(colorObj);
											
		gObj.fillRect(50,50,350,75);

	}
/**
 * Gets the applet information.
 * @return java.lang.String
 */
public String getAppletInfo() {
	return "Scroll created using VisualAge for Java.";
}
/**
 * Return the Label1 property value.
 * @return java.awt.Label
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Label getLabel1() {
	if (ivjLabel1 == null) {
		try {
			ivjLabel1 = new java.awt.Label();
			ivjLabel1.setName("Label1");
			ivjLabel1.setFont(new java.awt.Font("dialog", 1, 12));
			ivjLabel1.setText("Color Chooser -  Deitel & Deitel, p640, Problem 11.13");
			ivjLabel1.setBounds(61, 12, 320, 23);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjLabel1;
}
/**
 * Return the Label2 property value.
 * @return java.awt.Label
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Label getLabel2() {
	if (ivjLabel2 == null) {
		try {
			ivjLabel2 = new java.awt.Label();
			ivjLabel2.setName("Label2");
			ivjLabel2.setFont(new java.awt.Font("dialog", 1, 12));
			ivjLabel2.setText("R");
			ivjLabel2.setBounds(326, 156, 41, 23);
			ivjLabel2.setForeground(java.awt.Color.red);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjLabel2;
}
/**
 * Return the Label3 property value.
 * @return java.awt.Label
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Label getLabel3() {
	if (ivjLabel3 == null) {
		try {
			ivjLabel3 = new java.awt.Label();
			ivjLabel3.setName("Label3");
			ivjLabel3.setFont(new java.awt.Font("dialog", 1, 12));
			ivjLabel3.setText("G");
			ivjLabel3.setBounds(326, 178, 41, 23);
			ivjLabel3.setForeground(java.awt.Color.green);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjLabel3;
}
/**
 * Return the Label4 property value.
 * @return java.awt.Label
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Label getLabel4() {
	if (ivjLabel4 == null) {
		try {
			ivjLabel4 = new java.awt.Label();
			ivjLabel4.setName("Label4");
			ivjLabel4.setFont(new java.awt.Font("dialog", 1, 12));
			ivjLabel4.setText("B");
			ivjLabel4.setBounds(326, 200, 41, 23);
			ivjLabel4.setForeground(java.awt.Color.blue);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjLabel4;
}
/**
 * Return the Scrollbar1 property value.
 * @return java.awt.Scrollbar
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Scrollbar getScrollbar1() {
	if (ivjScrollbar1 == null) {
		try {
			ivjScrollbar1 = new java.awt.Scrollbar();
			ivjScrollbar1.setName("Scrollbar1");
			ivjScrollbar1.setMaximum(275);
			ivjScrollbar1.setBounds(109, 155, 172, 23);
			ivjScrollbar1.setVisibleAmount(20);
			ivjScrollbar1.setValue(255);
			ivjScrollbar1.setOrientation(java.awt.Scrollbar.HORIZONTAL);
			// user code begin {1}

			
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjScrollbar1;
}
/**
 * Return the Scrollbar2 property value.
 * @return java.awt.Scrollbar
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Scrollbar getScrollbar2() {
	if (ivjScrollbar2 == null) {
		try {
			ivjScrollbar2 = new java.awt.Scrollbar();
			ivjScrollbar2.setName("Scrollbar2");
			ivjScrollbar2.setMaximum(275);
			ivjScrollbar2.setBounds(109, 177, 172, 23);
			ivjScrollbar2.setVisibleAmount(20);
			ivjScrollbar2.setValue(255);
			ivjScrollbar2.setOrientation(java.awt.Scrollbar.HORIZONTAL);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjScrollbar2;
}
/**
 * Return the Scrollbar3 property value.
 * @return java.awt.Scrollbar
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private Scrollbar getScrollbar3() {
	if (ivjScrollbar3 == null) {
		try {
			ivjScrollbar3 = new java.awt.Scrollbar();
			ivjScrollbar3.setName("Scrollbar3");
			ivjScrollbar3.setMaximum(275);
			ivjScrollbar3.setBounds(109, 199, 172, 23);
			ivjScrollbar3.setVisibleAmount(20);
			ivjScrollbar3.setValue(255);
			ivjScrollbar3.setOrientation(java.awt.Scrollbar.HORIZONTAL);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjScrollbar3;
}
/**
 * Return the TextField1 property value.
 * @return java.awt.TextField
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private TextField getTextField1() {
	if (ivjTextField1 == null) {
		try {
			ivjTextField1 = new java.awt.TextField();
			ivjTextField1.setName("TextField1");
			ivjTextField1.setFont(new java.awt.Font("dialog", 1, 12));
			ivjTextField1.setBackground(java.awt.Color.black);
			ivjTextField1.setBounds(283, 156, 41, 23);
			ivjTextField1.setEditable(false);
			ivjTextField1.setForeground(java.awt.Color.white);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjTextField1;
}
/**
 * Return the TextField2 property value.
 * @return java.awt.TextField
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private TextField getTextField2() {
	if (ivjTextField2 == null) {
		try {
			ivjTextField2 = new java.awt.TextField();
			ivjTextField2.setName("TextField2");
			ivjTextField2.setFont(new java.awt.Font("dialog", 1, 12));
			ivjTextField2.setBackground(java.awt.Color.black);
			ivjTextField2.setBounds(283, 178, 41, 23);
			ivjTextField2.setEditable(false);
			ivjTextField2.setForeground(java.awt.Color.white);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjTextField2;
}
/**
 * Return the TextField3 property value.
 * @return java.awt.TextField
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
private TextField getTextField3() {
	if (ivjTextField3 == null) {
		try {
			ivjTextField3 = new java.awt.TextField();
			ivjTextField3.setName("TextField3");
			ivjTextField3.setFont(new java.awt.Font("dialog", 1, 12));
			ivjTextField3.setBackground(java.awt.Color.black);
			ivjTextField3.setBounds(283, 200, 41, 23);
			ivjTextField3.setEditable(false);
			ivjTextField3.setForeground(java.awt.Color.white);
			// user code begin {1}
			// user code end
		} catch (java.lang.Throwable ivjExc) {
			// user code begin {2}
			// user code end
			handleException(ivjExc);
		}
	};
	return ivjTextField3;
}
/**
 * Called whenever the part throws an exception.
 * @param exception java.lang.Throwable
 */
private void handleException(Throwable exception) {

	/* Uncomment the following lines to print uncaught exceptions to stdout */
	// System.out.println("--------- UNCAUGHT EXCEPTION ---------");
	// exception.printStackTrace(System.out);
}
/*********
 * INIT - Handle the Applet init method.
 */
/* WARNING: THIS METHOD WILL BE REGENERATED. */
public void init() {
	super.init();
	try {
		setName("Scroll");
		setLayout(null);
		setSize(426, 240);
		add(getTextField1(), getTextField1().getName());
		add(getTextField2(), getTextField2().getName());
		add(getTextField3(), getTextField3().getName());
		add(getScrollbar1(), getScrollbar1().getName());
		add(getScrollbar2(), getScrollbar2().getName());
		add(getScrollbar3(), getScrollbar3().getName());
		add(getLabel1(), getLabel1().getName());
		add(getLabel2(), getLabel2().getName());
		add(getLabel3(), getLabel3().getName());
		add(getLabel4(), getLabel4().getName());
		// user code begin {1}

		//--- Scroll bar listeners
		//ivjScrollbar1.addAdjustmentListener(new ScrollbarHandler(this));
		//ivjScrollbar2.addAdjustmentListener(new ScrollbarHandler(this));
		//ivjScrollbar3.addAdjustmentListener(new ScrollbarHandler(this));
		
		ivjScrollbar1.addAdjustmentListener(this);
		ivjScrollbar2.addAdjustmentListener(this);
		ivjScrollbar3.addAdjustmentListener(this);

		//--- init the textfields
		ivjTextField1.setText(Integer.toString( ivjScrollbar1.getValue() ));
		ivjTextField2.setText(Integer.toString( ivjScrollbar2.getValue() ));
		ivjTextField3.setText(Integer.toString( ivjScrollbar3.getValue() ));
		ivjTextField1.setBackground( Color.red );
		ivjTextField2.setBackground( Color.green );
		ivjTextField3.setBackground( Color.blue );


		
		// user code end
	} catch (java.lang.Throwable ivjExc) {
		// user code begin {2}
		// user code end
		handleException(ivjExc);
	}
}
/**********
 * MAIN entrypoint - starts the part when it is run as an application
 * @param args java.lang.String[]
 */
public static void main(java.lang.String[] args) {
	try {
		Frame frame;
		try {
			Class aFrameClass = Class.forName("com.ibm.uvm.abt.edit.TestFrame");
			frame = (Frame)aFrameClass.newInstance();
		} catch (java.lang.Throwable ivjExc) {
			frame = new Frame();
		}
		Scroll aScroll;
		Class iiCls = Class.forName("Scroll");
		ClassLoader iiClsLoader = iiCls.getClassLoader();
		aScroll = (Scroll)java.beans.Beans.instantiate(iiClsLoader,"Scroll");
		frame.add("Center", aScroll);
		frame.setSize(aScroll.getSize());
		frame.setVisible(true);
	} catch (Throwable exception) {
		System.err.println("Exception occurred in main() of java.applet.Applet");
		exception.printStackTrace(System.out);
	}
}
/**********
 * PAINT - This method PAINTS a box around the area to be filled with a color
 * @param g java.awt.Graphics
 */
public void paint(Graphics g) {
	g.drawRect(48,48,354,77);
}
}