/* animationControl.java
   Paul Carlisle
   
   A control which sets the state of animation, as well as the direction.

*/

import java.awt.*;

public class animationControl extends Panel
{
   private GridBagLayout mainLayout;
   private GridBagLayout Flayout;
   private GridBagLayout Blayout;
   private GridBagConstraints mainConstraints;
   private Button Animate;
   private Button Backward;
   private Button Forward;
   private Panel Bbackgnd;
   private Panel Fbackgnd;
   private boolean Fselected = true;
   private boolean Aselected = false;
   private boolean gotMessage = false;
   public static int NONE = 0;
   public static int ANIMATE = 1;
   public static int REVERSE = 2;
   private int messageID = NONE;


   public animationControl(Font font)
   {
	  Blayout = new GridBagLayout();
	  Flayout = new GridBagLayout();
	  
	  mainLayout = new GridBagLayout();
	  mainConstraints = new GridBagConstraints();
	  
	  setLayout(mainLayout);
	  
	  Animate = new Button("Animate");
	  Animate.setFont(font);
	  Animate.setBackground(Color.white);
	  
	  Backward = new Button("<<");
	  Backward.setFont(font);
	  Backward.setBackground(Color.white);
	 
	  Forward = new Button(">>");
	  Forward.setFont(font);
	  Forward.setBackground(Color.white);
	  
	  // Create a Panel with a light background, and add
	  // the Backward button to it.
	  Bbackgnd = new Panel();
	  //Bbackgnd.setBackground(Color.lightGray);
	  Bbackgnd.setLayout(Blayout);
	  
	  // Use the mainConstraints object here to set up placement.
	  // This simply avoids creating a new variable.
	  mainConstraints.fill = GridBagConstraints.NONE;
	  mainConstraints.anchor = GridBagConstraints.CENTER;
	  mainConstraints.insets = new Insets(4, 4, 4, 4);
	  mainConstraints.gridx = 0;
	  mainConstraints.gridy = 0;
	  Blayout.setConstraints(Backward, mainConstraints);
	  Bbackgnd.add(Backward);
	 
	  // Create a Panel with a dark background, and add
	  // the Forward button to it.
	  Fbackgnd = new Panel();
	  //Fbackgnd.setBackground(Color.darkGray);
	  Fbackgnd.setLayout(Flayout);
	  
	  // Use the mainConstraints object here to set up placement.
	  // This simply avoids creating a new variable.
	  mainConstraints.gridx = 0;
	  Flayout.setConstraints(Forward, mainConstraints);
	  Fbackgnd.add(Forward);
	  
	  // Add the Animate button to the main layout.
	  mainConstraints.insets = new Insets(2, 2, 2, 2);
	  mainConstraints.gridx = 1;
	  mainLayout.setConstraints(Animate, mainConstraints);
	  add(Animate);
	  
	  // Add the Backward button/Panel combination to the main layout.
	  mainConstraints.gridx = 0;
	  mainLayout.setConstraints(Bbackgnd, mainConstraints);
	  add(Bbackgnd);
	  
	  // Add the Forward buton/Panel combination to the main layout.
	  mainConstraints.gridx = 2;
	  mainLayout.setConstraints(Fbackgnd, mainConstraints);
	  add(Fbackgnd);
	  
	  setControls(true, false);
   }   
   public boolean action(Event e, Object what)
   {
	  if (e.target == Backward)
	  {
		 setControls(false, Aselected);
		 gotMessage = true;
		 messageID = REVERSE;
	  }
	  else if (e.target == Forward)
	  {
		 setControls(true, Aselected);
		 gotMessage = true;
		 messageID = REVERSE;
	  }
	  else if (e.target == Animate)
	  {
		 setControls(Fselected, !Aselected);
		 gotMessage = true;
		 messageID = ANIMATE;
	  }
	  
	  return false;
   }   
   public boolean getAnimate()
   {
	  return Aselected;
   }   
   public boolean getForward()
   {
	  return Fselected;
   }   
   public boolean getMessage()
   {
	  boolean temp = gotMessage;
	  gotMessage = false;
	  return temp;
   }   
   public int getMessageID()
   {
	  return messageID;
   }   
   public void paint(Graphics g)
   {
	  if(Fselected)
	  {
		 
		 Fbackgnd.setBackground(Color.darkGray);
		 Bbackgnd.setBackground(Color.lightGray);
	  }
	  else if (!Fselected)
	  {
		
		 Fbackgnd.setBackground(Color.lightGray);
		 Bbackgnd.setBackground(Color.darkGray);
	  }
   }   
   public void setControls(boolean forward, boolean animate)
   {
	  if (animate)
	  {
		 Aselected = true;
		 Animate.setLabel("Stop");
	  }
	  else if (!animate)
	  {
		 Aselected = false;
		 Animate.setLabel("Animate");
	  }
	  
	  // Have to call repaint() to get some browsers to redraw the
	  // highlighting around the selected button.
	  if (forward)
	  {
		 Fselected = true;
		 Fbackgnd.setBackground(Color.darkGray);
		 Bbackgnd.setBackground(Color.lightGray);
		 Fbackgnd.repaint();
		 Bbackgnd.repaint();
	  }
	  else if (!forward)
	  {
		 Fselected = false;
		 Fbackgnd.setBackground(Color.lightGray);
		 Bbackgnd.setBackground(Color.darkGray);
		 Fbackgnd.repaint();
		 Bbackgnd.repaint();
	  }
   }   
   public void update(Graphics g)
   {
	  paint(g);
   }   
}