RGB Scrollbar version 4 (with all slider) source code

Return to RGB Page

//John T. Mayer
//rgbScrollbars4.java
/*
   This version puts in an "all" scrollbar to move the colors up and down
   for BG & FG.
*/

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class rgbScrollbars4 extends Applet implements AdjustmentListener
{
   private Label lblHeaderBG, lblRedBG, lblGrnBG, lblBluBG, lblDecBG, lblHexBG, lbl3HexBG;
   private Scrollbar sbRedBG, sbGrnBG, sbBluBG;
   private TextField txtRedBGDec, txtGrnBGDec, txtBluBGDec;
   private TextField txtRedBGHex, txtGrnBGHex, txtBluBGHex, txt3HexBG;
   private int RedBG=192, GreenBG=192, BlueBG=192;

   private Label lblHeaderFG, lblRedFG, lblGrnFG, lblBluFG, lblDecFG, lblHexFG, lbl3HexFG;
   private Scrollbar sbRedFG, sbGrnFG, sbBluFG;
   private TextField txtRedFGDec, txtGrnFGDec, txtBluFGDec;
   private TextField txtRedFGHex, txtGrnFGHex, txtBluFGHex, txt3HexFG;
   private int RedFG=0, GreenFG=0, BlueFG=0;

   private Label lblAllBG, lblAllFG;
   private Scrollbar sbAllBG, sbAllFG, sTemp;
   private int allBGmin, allBGmax, allFGmin, allFGmax;
   private int diffBG, diffFG, oldBGValue=192, oldFGValue=0;


   
   private String hex="0123456789ABCDEF";

   public void init()
   {
      int x=10, y=10;
      setLayout(null);

      //instantiate and add labels
      lblHeaderBG = new Label( "  Scroll to change the background color" );
      add(lblHeaderBG);
      lblRedBG = new Label( "   Red" );
      add(lblRedBG);
      lblGrnBG = new Label( "  Green" );
      add(lblGrnBG);
      lblBluBG = new Label( "   Blue" );
      add(lblBluBG);
      lblDecBG = new Label( " Dec" );
      add(lblDecBG);
      lblHexBG = new Label( " Hex" );
      add(lblHexBG);
      lbl3HexBG = new Label( " Standard 3-byte hex representation: " );
      add(lbl3HexBG);
      txtRedBGDec = new TextField( "0", 10 );
      add(txtRedBGDec);
      txtRedBGHex = new TextField( "00", 10 );
      add(txtRedBGHex);
      txtGrnBGDec = new TextField( "0", 10 );
      add(txtGrnBGDec);
      txtGrnBGHex = new TextField( "00", 10 );
      add(txtGrnBGHex);
      txtBluBGDec = new TextField( "0", 10 );
      add(txtBluBGDec);
      txtBluBGHex = new TextField( "00", 10 );
      add(txtBluBGHex);
      lblAllBG = new Label( " Move all" );
      add(lblAllBG);
      txt3HexBG = new TextField( " 000000", 20 );
      add(txt3HexBG);

      lblHeaderFG = new Label( "  Scroll to change the foreground color" );
      add(lblHeaderFG);
      lblRedFG = new Label( "   Red" );
      add(lblRedFG);
      lblGrnFG = new Label( "  Green" );
      add(lblGrnFG);
      lblBluFG = new Label( "   Blue" );
      add(lblBluFG);
      lblDecFG = new Label( " Dec" );
      add(lblDecFG);
      lblHexFG = new Label( " Hex" );
      add(lblHexFG);
      lbl3HexFG = new Label( " Standard 3-byte hex representation: " );
      add(lbl3HexFG);
      txtRedFGDec = new TextField( "0", 10 );
      add(txtRedFGDec);
      txtRedFGHex = new TextField( "00", 10 );
      add(txtRedFGHex);
      txtGrnFGDec = new TextField( "0", 10 );
      add(txtGrnFGDec);
      txtGrnFGHex = new TextField( "00", 10 );
      add(txtGrnFGHex);
      txtBluFGDec = new TextField( "0", 10 );
      add(txtBluFGDec);
      txtBluFGHex = new TextField( "00", 10 );
      add(txtBluFGHex);
      lblAllFG = new Label( " Move all" );
      add(lblAllFG);
      txt3HexFG = new TextField( " 000000", 20 );
      add(txt3HexFG);


      //instantiate Scrollbars
      sbRedBG = new Scrollbar(Scrollbar.HORIZONTAL, RedBG, 1, 0, 256);
      sbGrnBG = new Scrollbar(Scrollbar.HORIZONTAL, GreenBG, 1, 0, 256);
      sbBluBG = new Scrollbar(Scrollbar.HORIZONTAL, BlueBG, 1, 0, 256);
      sbRedBG.setBlockIncrement( 16 );
      sbGrnBG.setBlockIncrement( 16 );
      sbBluBG.setBlockIncrement( 16 );

      sbAllBG = new Scrollbar(Scrollbar.HORIZONTAL, RedBG, 1, 0, 256);
      sbAllBG.setBlockIncrement( 16 );
      
      sbRedFG = new Scrollbar(Scrollbar.HORIZONTAL, RedFG, 1, 0, 256);
      sbGrnFG = new Scrollbar(Scrollbar.HORIZONTAL, GreenFG, 1, 0, 256);
      sbBluFG = new Scrollbar(Scrollbar.HORIZONTAL, BlueFG, 1, 0, 256);
      sbRedFG.setBlockIncrement( 16 );
      sbGrnFG.setBlockIncrement( 16 );
      sbBluFG.setBlockIncrement( 16 );

      sbAllFG = new Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 256);
      sbAllFG.setBlockIncrement( 16 );

      //add scrollbars, position and size scrollbars and labels and textboxes
      lblHeaderBG.setBounds( x, y, 260, 20 );
      lblDecBG.setBounds( x+270, y, 35, 20 );
      lblHexBG.setBounds( x+320, y, 35, 20 );

      add(sbRedBG);
      lblRedBG.setBounds( x, y+=25, 50, 20 );
      sbRedBG.setBounds( x+60, y, 200, 20 );
      txtRedBGDec.setBounds( x+270, y, 35, 20 );
      txtRedBGHex.setBounds( x+320, y, 35, 20 );

      add(sbGrnBG);
      lblGrnBG.setBounds( x, y+=25, 50, 20 );
      sbGrnBG.setBounds( x+60, y, 200, 20 );
      txtGrnBGDec.setBounds( x+270, y, 35, 20 );
      txtGrnBGHex.setBounds( x+320, y, 35, 20 );

      add(sbBluBG);
      lblBluBG.setBounds( x, y+=25, 50, 20 );
      sbBluBG.setBounds( x+60, y, 200, 20 );
      txtBluBGDec.setBounds( x+270, y, 35, 20 );
      txtBluBGHex.setBounds( x+320, y, 35, 20 );

      add(sbAllBG);
      sbAllBG.setBounds( x+60, y+=25, 200, 20 );
      lblAllBG.setBounds( x, y, 50, 20 );

      lbl3HexBG.setBounds( x+60, y+=30, 200, 20 );
      txt3HexBG.setBounds( x+270, y, 85, 20 );


      //add scrollbars, position and size scrollbars and labels and textboxes
      lblHeaderFG.setBounds( x, y+=30, 260, 20 );
      lblDecFG.setBounds( x+270, y, 35, 20 );
      lblHexFG.setBounds( x+320, y, 35, 20 );

      add(sbRedFG);
      lblRedFG.setBounds( x, y+=25, 50, 20 );
      sbRedFG.setBounds( x+60, y, 200, 20 );
      txtRedFGDec.setBounds( x+270, y, 35, 20 );
      txtRedFGHex.setBounds( x+320, y, 35, 20 );

      add(sbGrnFG);
      lblGrnFG.setBounds( x, y+=25, 50, 20 );
      sbGrnFG.setBounds( x+60, y, 200, 20 );
      txtGrnFGDec.setBounds( x+270, y, 35, 20 );
      txtGrnFGHex.setBounds( x+320, y, 35, 20 );

      add(sbBluFG);
      lblBluFG.setBounds( x, y+=25, 50, 20 );
      sbBluFG.setBounds( x+60, y, 200, 20 );
      txtBluFGDec.setBounds( x+270, y, 35, 20 );
      txtBluFGHex.setBounds( x+320, y, 35, 20 );

      add(sbAllFG);
      sbAllFG.setBounds( x+60, y+=25, 200, 20 );
      lblAllFG.setBounds( x, y, 50, 20 );

      lbl3HexFG.setBounds( x+60, y+=30, 200, 20 );
      txt3HexFG.setBounds( x+270, y, 85, 20 );

      //create scrollbarHandlers
      sbRedBG.addAdjustmentListener(this);
      sbGrnBG.addAdjustmentListener(this);
      sbBluBG.addAdjustmentListener(this);
      sbAllBG.addAdjustmentListener(this);

      sbRedFG.addAdjustmentListener(this);
      sbGrnFG.addAdjustmentListener(this);
      sbBluFG.addAdjustmentListener(this);
      sbAllFG.addAdjustmentListener(this);

//      sbAllBG.setVisibleAmount(1);
   }

   private String intToHex( int i )
   {
      int ihi, ilo;
      ihi = i / 16;
      ilo = i % 16;
      return hex.substring( ihi, ihi+1 ) + hex.substring( ilo, ilo+1 );
   }

   public void paint( Graphics g)
   {
      g.drawString( "(mine says:) java.awt.Font[family=Dialog,name=Dialog,style=plain,size=12]", 10, 390 );
      g.drawString( "(your's below says:) something else, the specifics tell me your setup ([family/name/style/size])", 10, 410 );
      g.drawString( g.getFont().toString(), 50, 430 );

      setBackground(new Color(RedBG, GreenBG, BlueBG));
      g.setColor(new Color(RedFG, GreenFG, BlueFG));

      txtRedBGDec.setText( "" + RedBG );
      txtRedBGHex.setText( intToHex( RedBG ) );
      txtGrnBGDec.setText( "" + GreenBG );
      txtGrnBGHex.setText( intToHex( GreenBG ) );
      txtBluBGDec.setText( "" + BlueBG );
      txtBluBGHex.setText( intToHex( BlueBG ) );
      txt3HexBG.setText( " "+intToHex(RedBG)+intToHex(GreenBG)+intToHex(BlueBG) );

      txtRedFGDec.setText( "" + RedFG );
      txtRedFGHex.setText( intToHex( RedFG ) );
      txtGrnFGDec.setText( "" + GreenFG );
      txtGrnFGHex.setText( intToHex( GreenFG ) );
      txtBluFGDec.setText( "" + BlueFG );
      txtBluFGHex.setText( intToHex( BlueFG ) );

      txt3HexFG.setText( " "+intToHex(RedFG)+intToHex(GreenFG)+intToHex(BlueFG) );

      g.setFont( new Font( "Serif", Font.BOLD, 35 ) );
      g.drawString( "Sample Big Text", 20, 370 );
      g.setFont( new Font( "Serif", Font.BOLD, 12 ) );
      g.drawString( "Sample little Text ", 280, 370 );
   }


   public void adjustmentValueChanged(AdjustmentEvent e)
   {
      int rBG, gBG, bBG, rFG, gFG, bFG;

      allBGmin=255;
      allBGmax=0;
      allFGmin=255;
      allFGmax=0;

//      Scrollbar sTemp =(Scrollbar) e.getAdjustable();
      sTemp =(Scrollbar) e.getAdjustable();


      if(sTemp==sbRedBG)
      {
         RedBG = e.getValue();
         bgSetMinMax();
      }
      else if(sTemp==sbGrnBG)
      {
         GreenBG = e.getValue();
         bgSetMinMax();
      }
      else if(sTemp==sbBluBG)
      {
         BlueBG = e.getValue();
         bgSetMinMax();
      }                             
      else if(sTemp==sbRedFG)
      {
         RedFG = e.getValue();
         fgSetMinMax();
      }
      else if(sTemp==sbGrnFG)
     {
         GreenFG = e.getValue();
          fgSetMinMax();
      }
      else if(sTemp==sbBluFG)
      {
         BlueFG = e.getValue();
         fgSetMinMax();
      }
      else if(sTemp==sbAllBG)
      {
         diffBG = sbAllBG.getValue() - oldBGValue;

         RedBG+=diffBG;
         RedBG = RedBG > 255 ? 255 : RedBG;
         RedBG = RedBG < 0 ? 0 : RedBG;
         sbRedBG.setValue(RedBG);

         GreenBG+=diffBG;
         GreenBG = GreenBG > 255 ? 255 : GreenBG;
         GreenBG = GreenBG < 0 ? 0 : GreenBG;
         sbGrnBG.setValue(GreenBG);

         BlueBG+=diffBG;
         BlueBG = BlueBG > 255 ? 255 : BlueBG;
         BlueBG = BlueBG < 0 ? 0 : BlueBG;
         sbBluBG.setValue(BlueBG);

         bgSetMinMax();

         oldBGValue = sbAllBG.getValue();
      }
      if(sTemp==sbAllFG)
      {
         diffFG = sbAllFG.getValue() - oldFGValue;

         RedFG+=diffFG;
         RedFG = RedFG > 255 ? 255 : RedFG;
         RedFG = RedFG < 0 ? 0 : RedFG;
         sbRedFG.setValue(RedFG);

         GreenFG+=diffFG;
         GreenFG = GreenFG > 255 ? 255 : GreenFG;
         GreenFG = GreenFG < 0 ? 0 : GreenFG;
         sbGrnFG.setValue(GreenFG);

         BlueFG+=diffFG;
         BlueFG = BlueFG > 255 ? 255 : BlueFG;
         BlueFG = BlueFG < 0 ? 0 : BlueFG;
         sbBluFG.setValue(BlueFG);

         fgSetMinMax();

         oldFGValue = sbAllFG.getValue();
      }
      repaint();

   }

   public void bgSetMinMax()
   {
      allBGmin = RedBG < allBGmin ? RedBG : allBGmin;
      allBGmin = GreenBG < allBGmin ? GreenBG : allBGmin;
      allBGmin = BlueBG < allBGmin ? BlueBG : allBGmin;
      allBGmax = RedBG > allBGmax ? RedBG : allBGmax;
      allBGmax = GreenBG > allBGmax ? GreenBG : allBGmax;
      allBGmax = BlueBG > allBGmax ? BlueBG : allBGmax;
      sbAllBG.setVisibleAmount( allBGmax - allBGmin );
      sbAllBG.setValue( allBGmin );
      oldBGValue = allBGmin;
   }

   public void fgSetMinMax()
   {
      allFGmin = RedFG < allFGmin ? RedFG : allFGmin;
      allFGmin = GreenFG < allFGmin ? GreenFG : allFGmin;
      allFGmin = BlueFG < allFGmin ? BlueFG : allFGmin;
      allFGmax = RedFG > allFGmax ? RedFG : allFGmax;
      allFGmax = GreenFG > allFGmax ? GreenFG : allFGmax;
      allFGmax = BlueFG > allFGmax ? BlueFG : allFGmax;
      sbAllFG.setVisibleAmount( allFGmax - allFGmin );
      sbAllFG.setValue( allFGmin );
      oldFGValue = allFGmin;
   }
}