/*
   draw5: respond to delete and esc keys; thicken item when mouse is over it.
*/

import java.awt.*;

public class Draw5 extends Draw4
{
   Item newItem() { return (Item)(new Item5()); }

   Item5 item5(int i) { return (Item5)item[i]; }

   public boolean mouseMove(Event e, int x, int y) {
      damage = true;
      mx = x;
      my = y;
      thickenItemAt(x, y);
      return true;
   }

   // SHOW THE ITEM AT THE MOUSE AS THICKER THAN OTHER ITEMS

   public void thickenItemAt(int x, int y) {
      for (int i = 0 ; i < nItems ; i++)
         item5(i).setThicken(item5(i).contains(x, y));
   }

   // DELETE KEY TO DELETE ITEM AT MOUSE
   // ESCAPE KEY TO RE-INITIALIZE

   public boolean keyUp(Event e, int key) {
      damage = true;
      switch (key) {
      case 127: deleteItem(itemAt(mx, my)); return true;
      case  27: clear()                   ; return true;
      }
      return false;
   }

   // DELETE A NEW ITEM THAT IS REALLY JUST THE RESULT OF A CLICK

   public boolean mouseUp(Event e, int x, int y) {
      if (iSelected < 0 && item5(nItems-1).nPts < 3)
         deleteItem(nItems-1);
      return super.mouseUp(e, x, y);
   }

   // REINITIALIZE EVERYTHING

   public void clear() {
      nItems = 0;
      Item.idCount = 0;
   }

   // DELETE ONE ITEM

   void deleteItem(int i) {
      if (i >= 0) {
         if (i == nItems-1)
            --Item.idCount;
         for (int j = i ; j < nItems ; j++)
            item[j] = (Item)item5(j+1);
         nItems--;
      }
   }
}