/** 
 * Desktop wallpapering program.
 */

import java.util.Scanner;
/**
   This program is the solution for week 3 of java lab.
*/
public class Wallpaper {
   
   /**
    *  This program's main method performs all the work for the problem.
    *  @param args is not used here.
   */

   public static void main(String[] args) {
      Scanner kb = new Scanner(System.in);
      int screenWidth, screenHeight;
      double picWidth, picHeight;
      int ppi;
      double matArea;
      final int fWidth = 8;  // frame width
      final int fHeight = 10;  // frame height
      final int fppi = 1600;  // frame pixels per inch
    
      System.out.print("Enter screen width and height in pixels: ");
      screenWidth = kb.nextInt();
      screenHeight = kb.nextInt();
      System.out.println("Total screen area is " + screenWidth * screenHeight 
                        + " pixels");
         
      System.out.print("Enter picture width and height in inches: ");
      picWidth = kb.nextDouble();
      picHeight = kb.nextDouble();
    
      System.out.print("Enter ppi: ");
      ppi = kb.nextInt();
      picWidth = Math.ceil(picWidth * ppi);   // convert from inches to pixels
      picHeight = Math.ceil(picHeight * ppi);  // convert from inches to pixels
      System.out.println("Picture width and height in pixels: " 
                        + picWidth + " " + picHeight);
         
      matArea = screenWidth * screenHeight - picWidth * picHeight;
      System.out.println("The total mat area is " + matArea + " square pixels");
      
      System.out.println("Tiling will have " 
                        + (int) Math.ceil(screenHeight / picHeight) 
                        + " rows and " 
                        + (int) Math.ceil(screenWidth / picWidth) 
                        + " columns");
         
      System.out.println("A picture would have to be "
                        + (double) screenWidth / ppi 
                        + " inches wide by " + (double) screenHeight / ppi
                        + " inches tall to take up the whole screen.");
         
      System.out.println("An 8x10 picture at 1600 ppi would need a " 
                        + (fWidth * fppi) + " pixels wide by "
                        + (fHeight * fppi) 
                        + " pixels high screen to completely fit");
   }
}