//*****************************************************************************
// ColorScrollTextPanel.java
//
// 15/3/00
// Geetika Tewari, Christie Rice & Victoria Manfredi
//
//
//*****************************************************************************

import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.io.*;
import java.applet.*;
import java.util.*;

public class ColorScrollTextPanel extends Panel implements AdjustmentListener
{
  
  ColorFrame cf;       // Parent

  GridBagLayout gridbag;

  Label rgbLabel;         // 
  Scrollbar rgbScrollbar; // Components of the ScrollTextPanel panel 
  TextField rgbTextField; //  

  int whichSlider;
  ColorTextFieldHandler TFHandler;
  

  //********************************
  //
  //  constructor
  //
  //********************************
  public ColorScrollTextPanel(ColorFrame cff, Label l, Scrollbar s, TextField
			      t, Color bkgrndColor, int ws, 
			      ColorTextFieldHandler tfh)
  {
    super();
    cf = cff;

    rgbLabel = l;
    rgbScrollbar = s;
    rgbTextField = t;


    whichSlider = ws;
    TFHandler = tfh;


    rgbScrollbar.addAdjustmentListener(this);


    // Begin GridBagLayout setup
    gridbag = new GridBagLayout();
    
    GridBagConstraints constraints = new GridBagConstraints();
    setLayout(gridbag);

    buildConstraints(constraints, 0, 1, 1, 1, 20, 100);
    constraints.anchor = GridBagConstraints.EAST;
    gridbag.setConstraints(rgbLabel, constraints);
    add(rgbLabel);

    buildConstraints(constraints, 1, 1, 3, 1, 80, 100);
    constraints.fill = GridBagConstraints.HORIZONTAL;
    gridbag.setConstraints(rgbScrollbar, constraints);
    add(rgbScrollbar);

    buildConstraints(constraints, 4, 1, 1, 1, 20, 100);
    constraints.anchor = GridBagConstraints.WEST;
    constraints.fill = GridBagConstraints.NONE;
    gridbag.setConstraints(rgbTextField, constraints);

    rgbTextField.addTextListener(TFHandler);
    add(rgbTextField);



   setBackground(bkgrndColor);


  }// end constructor 


  //********************************
  //
  //  buildConstraints
  //
  //********************************
  public void buildConstraints(GridBagConstraints gbc, int gx, int gy, int gw,
			       int gh, int wx, int wy)
  { 
    // Set up helper method for using a GridBagLayout
    gbc.gridx = gx;
    gbc.gridy = gy;
    gbc.gridwidth = gw;
    gbc.gridheight = gh;
    gbc.weightx = wx;
    gbc.weighty = wy;

  }// end buildConstraints



  //***********************************
  //
  //  adjustmentValueChanged
  // 
  //***********************************
  public void adjustmentValueChanged(AdjustmentEvent e)
  {

    // 0 = red, 1 = green, 2 = blue
    if (whichSlider == 0 )
      {
        cf.r = e.getValue(); // initialize the red component of the
      	                     // currently selected color

        // Set current color to the new color and repaint so that
        // observers of ColorCanvas know that the current color
        // has changed and so will change to show the new current color.
        cf.curc = new Color (cf.r, cf.g, cf.b);
        cf.cp.cbp.cc.repaint();

      }// end if red
    else if (whichSlider == 1 )
      {

        cf.g = e.getValue(); // initialize the green component of the
      	                     // currently selected color

        // Set current color to the new color and repaint so that
        // observers of ColorCanvas know that the current color
        // has changed and so will change to show the new current color.
        cf.curc = new Color (cf.r, cf.g, cf.b);
        cf.cp.cbp.cc.repaint();

      }// end if green
    else if (whichSlider == 2)
      {
        cf.b = e.getValue(); // initialize the blue component of the
      	                     // currently selected color

        // Set current color to the new color and repaint so that
        // observers of ColorCanvas know that the current color
        // has changed and so will change to show the new current color.
        cf.curc = new Color (cf.r, cf.g, cf.b);
        cf.cp.cbp.cc.repaint();

      }// end if blue


  }// end adjustmentValueChanged


  
}// end ColorScrollTextPanel