// Fig. 12.14: DBPanel.java
// Drawing lines, rectangles and ovals.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class DBPanel extends JPanel {

	private int column;
	private int row;
	private int borderX;
	private int borderY;
	private int borderSpace;
	private int baseX;
	private int baseY;
	private int dist;
	private int width;


   // set window's title bar String and dimensions
   public DBPanel()
   {
      //super( "Drawing lines, rectangles and ovals" );

	   column = 6;
	   row = 6;
	   borderX = 4;
	   borderY = 4;
	   borderSpace = 5;
	   baseX = borderX + borderSpace;
	   baseY = borderY + borderSpace;
	   dist = 60;
	   width = 10;

	   addComponentListener(new ComponentAdapter () 
	   {
		   public void componentResized(ComponentEvent event) 
		   {
			   int wid = getWidth();
			   int hgt = getHeight();

				int tempWid = (wid - borderX * 2 - width*2) / (column - 1);
			   int tempHgt = (hgt - borderX - borderY - width*2) / (row - 1);
			   int minWidHgt = (tempWid<tempHgt)? tempWid : tempHgt;

			   if (minWidHgt < width * 4)
				   dist = width * 4;
			   else
				   dist = minWidHgt;

			   if (wid < 200)
				   wid = 250;
			   if (hgt < 100)
				   hgt = 150;

			   // setSize(wid, hgt);
			   setSize ((borderX + borderSpace)*2 + (column-1)*dist + width,
				   borderX + borderY + borderSpace*2 + (row-1)*dist + width);
				   
			  /* setTitle( "resize: Width=" + getWidth() + 
				   "; Height=" + getHeight() );
*/
			   repaint();
		   }
	   });

	   // set up mouse motion event handling
	   addMouseMotionListener(

		   new MouseMotionListener() 
	   {  // anonymous inner class

		   // handle mouse drag event
		   public void mouseDragged( MouseEvent event )
		   {
			  /* setTitle( "Dragging: x=" + event.getX() + 
				   "; y=" + event.getY() );
				   */
		   }

		   // handle mouse move event
		   public void mouseMoved( MouseEvent event )
		   {
			   /* setTitle( "Moving: x=" + event.getX() +
				   "; y=" + event.getY() );
				   */
		   }

	   } // end anonymous inner class

		   ); // end call to addMouseMotionListener
      //setSize( 400, 400 );
	   setSize ((borderX + borderSpace)*2 + (column-1)*dist + width,
				 borderX + borderY + borderSpace*2 + (row-1)*dist + width);
      //setVisible( true );
   }

   // display various lines, rectangles and ovals
   public void paintComponent( Graphics g )
   {
      super.paintComponent( g );  // call superclass's paint method

      g.setColor( Color.BLUE );

	   for (int dX = 0; dX < column; dX++)
	   {
		   for (int dY = 0; dY < row; dY++)
		   {
			   int posX = baseX + dX * dist;
			   int posY = baseY + dY * dist;

			   g.setColor( Color.BLUE );
			   g.fillOval( posX, posY, width, width );

			   int halfWidth = width/2;

			   if (dX != column - 1)
			   {
				   g.setColor( Color.RED );
				   g.fillRect( posX + width + halfWidth, posY, dist-(width*2), width );
			   }

			   if (dY != row -1)
			   {
				   g.setColor( Color.GREEN );
				   g.fillRect( posX, posY + width + halfWidth, width, dist-(width*2) );
			   }
		   }
	   }





   } // end method paint

  

} // end class DBPanel