/*
   draw6: color palette; drag color onto items.
*/

import java.awt.*;

public class Draw6 extends Draw5
{
   Item newItem() { return (Item)(new Item6()); }

   Item6 item6(int i) { return (Item6)item[i]; }

   int drawingColor = 0;
   boolean isDraggingColor = false;

   // ADD A COLOR PALETTE

   Color palette[] = {
      Item6.defaultColor,
      new Color(255,  0,100),
      new Color(255,128,  0),
      new Color(255,255,  0),
      new Color(  0,255,  0),
      new Color(  0,160,255),
      new Color(220,  0,255),
      bgColor(),
   };

   int paletteX(int i) { return 20 + 20 * i; }

   // RE-INITIALIZING ALSO INITIALIZES THE DRAWING COLOR

   public void clear() {
      drawingColor = 0;
      super.clear();
   }

   public void drawItem(int i) {
      item6(i).draw(g, palette);
   }

   // DRAW THE PALETTE BEFORE DRAWING ANY ITEMS

   public void renderFg() {
      for (int i = 0 ; i < palette.length ; i++) {
         int r = i == drawingColor ? 10 : 7;
         g.setColor(palette[i] == bgColor() ? Item6.faintColor : Color.black);
         g.fillOval(paletteX(i) - r  , 20 - r  , 2*r  , 2*r  );
         g.setColor(palette[i]);
         g.fillOval(paletteX(i) - r+2, 20 - r+2, 2*r-4, 2*r-4);
      }

      for (int i = 0 ; i < nItems ; i++)
         if (i != iSelected && item6(i).color == palette.length-1)
            drawItem(i);

      for (int i = 0 ; i < nItems ; i++)
         if (i != iSelected && item6(i).color != palette.length-1)
            drawItem(i);

      for (int i = 0 ; i < nItems ; i++)
         if (i == iSelected)
            drawItem(i);

      //super.renderFg();

      if (isDraggingColor) {
         g.setColor(palette[drawingColor]);
         g.fillOval(mx - 8, my - 8, 16, 16);
      }
   }

   // CHECK FOR MOUSE-DOWN OVER THE COLOR PALETTE

   public boolean mouseDown(Event e, int x, int y) {
      damage = true;

      isDraggingColor = false;
      for (int i = 0 ; i < palette.length ; i++) {
         int dx = paletteX(i) - x;
         int dy = 20 - y;
         if (dx * dx + dy * dy < 8 * 8) {
            drawingColor = i;
            isDraggingColor = true;
         }
      }
      if (isDraggingColor)
         return true;

      // IF ADDING A NEW ITEM, SET THE NEW ITEM'S COLOR TO THE DRAWING COLOR

      int nItemsPrevious = nItems;
      super.mouseDown(e, x, y);
      if (nItems > nItemsPrevious)
         setColor(nItems-1);

      return true;
   }

   // MAYBE DRAG A COLOR FROM THE PALETTE TO AN ITEM

   public boolean mouseDrag(Event e, int x, int y) {

      damage = true;
      if (isDraggingColor) {
         mx = x;
         my = y;
         thickenItemAt(x, y);
         return true;
      }

      return super.mouseDrag(e, x, y);
   }

   // DRAGGING A COLOR INTO AN ITEM CHANGES THE ITEM'S COLOR

   public boolean mouseUp(Event e, int x, int y) {
      damage = true;

      if (isDraggingColor) {
         isDraggingColor = false;
         setColor(itemAt(x, y));
         return true;
      }

      return super.mouseUp(e, x, y);
   }

   public void setColor(int i) {
      if (i >= 0)
         item6(i).setColor(drawingColor);
   }

   boolean isColorKey = false;

   // TO SET DRAWING COLOR, USER CAN DO KEY SEQUENCE: CNTRL-C DIGIT

   public boolean keyUp(Event e, int key) {
      if (key == 3) {
         isColorKey = true;
         return true;
      }
      if (isColorKey && key >= '1' && key < '1' + palette.length) {
         drawingColor = key - '1';
         for (int i = 0 ; i < nItems ; i++)
            if (item6(i).contains(mx,my))
               setColor(i);
         damage = true;
         return true;
      }
      isColorKey = false;
      return super.keyUp(e, key);
   }
}