/*File Prob02 Copyright 2008 R.G.Baldwin 
Revised 12/16/08 
*********************************************************/ 
import java.awt.Color; 
 
public class Prob02{ 
  public static void main(String[] args){ 
    Picture[] pictures = new Prob02Runner().run(); 
 
    System.out.println(pictures[0]); 
    System.out.println(pictures[1]); 
    System.out.println(pictures[2]); 
  }//end main method 
}//end class Prob02 
//======================================================// 
 
class Prob02Runner{ 
 
  public Prob02Runner(){//constructor 
    System.out.println("Display your name here."); 
  }//end constructor 
  //----------------------------------------------------// 
 
  public Picture[] run(){ 
    Picture picA = new Picture("Prob02a.jpg"); 
    picA.explore(); 
    Picture picB = new Picture("Prob02b.jpg"); 
    picB.addMessage("Display your name here.",10,20); 
    picB.explore(); 
 
    Picture picC = cropAndFlip(picA,4,5,80,105); 
 
    copyPictureWithCrop(picA,picB,82,70,4,5,77,101); 
    copyPictureWithCrop(picC,picB,161,70,0,0,77,101); 
 
 
    picB.explore(); 
 
    Picture[] output = {picA,picB,picC}; 
    return output; 
  }//end run 
  //----------------------------------------------------// 
 
  //Crops a picture to the specified coordinate values and 
  // flips it around a vertical line at its center. 
  private Picture cropAndFlip(Picture pic,int x1,int y1, 
                              int x2,int y2){ 
    Picture output = new Picture(x2-x1+1,y2-y1+1); 
 
    int width = output.getWidth(); 
    Pixel pixel = null; 
    Color color = null; 
    for(int col = x1;col < (x2+1);col++){ 
      for(int row = y1;row < (y2+1);row++){ 
        color = pic.getPixel(col,row).getColor(); 
        pixel = output.getPixel(width-col+x1-1,row-y1); 
        pixel.setColor(color); 
      }//end inner loop 
    }//end outer loop 
 
    return output; 
  }//end crop and flip 
  //----------------------------------------------------// 
 
  //Copies part of the source picture into the destination 
  // picture with an offset on both axes after first 
  // confirming that the part will fit. Does nothing if it 
  // won't fit. 
  private void copyPictureWithCrop( 
           Picture source,Picture dest,int xOff, 
                                       int yOff, 
                                       int xCoor, 
                                       int yCoor, 
                                       int width, 
                                       int height){ 
 
    //Confirm that source will fit in destination 
    if(((width+xOff) <= dest.getWidth()) && 
         ((height+yOff) <= dest.getHeight())){ 
      Pixel pixel = null; 
      Color color = null; 
      for(int col = 0;col < width;col++){ 
        for(int row = 0;row < height;row++){ 
          color = source.getPixel( 
                      col + xCoor,row + yCoor).getColor(); 
          pixel = dest.getPixel(col+xOff,row+yOff); 
          pixel.setColor(color); 
        }//end inner loop 
      }//end outer loop 
    }//end if 
  }//end copyPictureWithCrop method 
}//end class Prob02Runner