import java.awt.*;
import java.awt.event.*;
class AmCanvas extends Canvas{
      AmCanvas(){// konstruktor
	setBackground(AmDefault.backgroundColor);
	setForeground(AmDefault.foregroundColor);
	addMouseListener(new AmMouseListener(this));
	addKeyListener(new AmKeyListener());
      }//konstruktor
      
    static Point start = AmDefault.start;
    
    public void paint(Graphics g){// lo~uendile joonistamine
      // joon ymber louendi:     
      int canvh = Am.canvas.getSize().height;
      int canvw = Am.canvas.getSize().width;
      g.setColor(Color.green);
      g.drawRect(0, 0 , canvw-1, canvh-1);
	
      if(Am.s != null){
	    // kui (planeeritud) skeem on olemas, siis joonistada: 
	    Am.s.view.draw(g, Am.s);
	}	    
	else{ // kui skeemi pole, siis tyhjendada louend:
	     g.setColor(AmDefault.backgroundColor); 
	     g.fillRect(0, 0 , canvw-1, canvh-1);
	 // lo~uendi tyhjendamine toimib vaate vahetamisel
	}
	
	// kuna joonistamine toimub alati ka pearaami muutmisel, 
	// siis on siin paras koht kerimisribade (ymber)seadmiseks
      // vertikaalne:		
      int vis_am = 100;
      if (canvh < Am.s.view.height){// kui joonis ei mahu lo~uendile
         vis_am = (int)( ((float)canvh/(float)Am.s.view.height)*100);
      }
      Am.sbv.setVisibleAmount(vis_am);      
      // horisontaalne:				
      vis_am = 100;
      if (canvw < Am.s.view.width){// kui joonis ei mahu lo~uendile
         vis_am = (int)( ((float)canvw/(float)Am.s.view.width)*100);
      }
      Am.sbh.setVisibleAmount(vis_am);	
      
      Am.caret.draw(g);
		
    }//paint 
}//AmCanvas

// lo~uendiga seotud kuularid:

class AmKeyListener implements KeyListener{
    //AmKeyListener(){}
    public void keyPressed(KeyEvent event){
      switch(event.getKeyCode()){
	case KeyEvent.VK_LEFT:  Am.caret.moveLeft();  break;
	case KeyEvent.VK_RIGHT: Am.caret.moveRight(); break;
	case KeyEvent.VK_DOWN:  Am.caret.moveDown();  break;
        case KeyEvent.VK_UP:    Am.caret.moveUp();    break;
        case KeyEvent.VK_PAGE_DOWN: break;
        case KeyEvent.VK_PAGE_UP:   break;
      } 
    }//keyPressed
    public void keyReleased(KeyEvent event){
    }//keyReleased
    public void keyTyped(KeyEvent event){ 
       char c = event.getKeyChar();
       System.out.println("typed:"+c+".");
       int xxx = (int)c; System.out.println("int c = "+xxx);
       if((int)c == KeyEvent.CHAR_UNDEFINED)
          System.out.println("pole char");
       if(c == 0)System.out.println("pole char");
          else
       System.out.println("on char");
       if((int)c == 127){          // || (int)c == 8)
       //      delete-klahv       backspace-klahv           
	    if(Am.selected != null){// sama mis menyyst Delete
		AmEdit.deleteSketch(Am.selected);
		Am.cancelSelection();
		if(Am.s != null)
		    Am.s.view.plan(Am.s, Am.startx, Am.starty);
		Am.canvas.repaint();
	    }
	}
	else{ // on symbol
	    AmEdit.insertCharAtCaretRight(c);
	    int oldh = Am.s.view.height;
	     Am.s.view.plan(Am.s, Am.startx, Am.starty);
	     if (oldh == Am.s.view.height){ // ei muutunud
		Am.caret.row.repaintFromCaret(); // ainult rida
		//skeemikommentaari korral veel lopukommentaar
		 if(Am.s.view instanceof AmView1 && Am.caret.parentHead == null && 
		    Am.caret.parentPrimitive == null){
		  //veel loppu:
// !!! vaatest so~ltuv !!!		  
		  AmSketch s = Am.caret.parent;
		  Am.canvas.repaint(
				     s.comment.x, 
				     s.comment.y + s.view.height- s.comment.height/4,
				     s.comment.width,
				     s.comment.height
				     ); 
		 } 
	     }
	     else // kogu skeem alates sellest reast
		Am.canvas.repaint(Am.s.view.x, Am.caret.row.y, 
				  Am.s.view.width, 
				  Am.s.view.height - (Am.caret.row.y-Am.s.view.y)
				   );
	}//else on symbol
    }//keyTyped
}//AmKeyListener

class AmMouseListener implements MouseListener{
   AmCanvas c;
  AmMouseListener(AmCanvas cc){c = cc;}
  public void mousePressed(MouseEvent e){
     System.out.println("MousePressedEvent:"+e);
  }
  public void mouseReleased(MouseEvent e){
  }
  public void mouseEntered(MouseEvent e){
  System.out.println("MouseEnteredEvent:"+e);
  }
  public void mouseExited(MouseEvent e){
  System.out.println("MouseExitedEvent:"+e);
  }
  public void mouseClicked(MouseEvent e){
    // hiireklo~psu koht:
    Point p =  new Point(e.getX(), e.getY());
    System.out.println("MouseClickedEvent:"+e);
    
    if(Am.selected != null){// vana valik maha
       Am.selected.view.unpaintSelection();
       Am.cancelSelection();
    }
    // leida skeem, millel hiirt klo~psati:
    AmView.finish = false;
    AmView.result = new AmCaret();
    AmSketch sk = Am.s.view.pointLocation(p, Am.s);
    
    if(sk != null){// valida klo~psatud skeem 
    Am.setSelection(sk);
	Am.s.view.repaintSelection();  
    }
    else if (AmView.result.parent != null){// oli tekstil mingis skeemis  
	 Am.caret.unpaint();
	 Am.caret.parent = AmView.result.parent;
	 Am.caret.row = AmView.result.row;
	 Am.caret.parentText = AmView.result.parentText;
	 Am.caret.parentHead = AmView.result.parentHead;
	 Am.caret.parentPrimitive = AmView.result.parentPrimitive;
	 Am.caret.moveInRowToMouse(p);
	 Am.caret.paint();
    }
  }//mouseClicked
  
}//AmMouseListener