// $Id: HegemonScrollCanvas.java,v 1.5 1999/06/05 23:29:12 greear Exp $
// $Revision: 1.5 $  $Author: greear $ $Date: 1999/06/05 23:29:12 $

//
//Hegemon Client Code:  Java Client for ScryMUD Server Code
//Copyright (C) 1998  Ben Greear
//
//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either version 2
//of the License, or (at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
// To contact the Author, Ben Greear:  greear@cyberhighway.net, (preferred)
//                                     greearb@agcs.com
//

import java.awt.*;
import java.util.*;
import java.awt.event.*;

class HegemonScrollCanvas extends Canvas {
   Vector text_components = null;
   boolean do_paint;
   int x_offset = 0;
   HegemonDisplay display;
   Vector non_scrollables = null;

   public HegemonScrollCanvas(HegemonDisplay d) {
      super();
      do_paint = true;
      display = d;

      addKeyListener(new KeyAdapter() {
         public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_PAGE_UP) {
               display.do_page_up_adjustment();
            }
            else if (e.getKeyCode() == KeyEvent.VK_PAGE_DOWN) {
               display.do_page_down_adjustment();
            }
            else
              super.keyPressed(e);
         }});

      addComponentListener(new ComponentListener() {
         public void componentResized(ComponentEvent e) {
            display.getScroll().notifyScrollCanvasResized();
         }
         
         public void componentMoved(ComponentEvent e) {
            return;
         }

         public void componentHidden(ComponentEvent e) {
            return;
         }

         public void componentShown(ComponentEvent e) {
            return;
         }
      });

   }

   public void clear() {
      text_components = null;
      do_paint = true;
   }

   public void setXOffset(int x) {
      x_offset = x;
   }
   
   public void setComponents(Vector t_comp, Vector non_scrolls) {
      //Log.it("Set components:  " + t_comp);
      text_components = t_comp;
      non_scrollables = non_scrolls;
   }

   public void paint() {
      //Log.it("In HegemonScrollCanvas.paint()");
      Graphics g = getGraphics();
      update(g);
      do_paint = false;
      paint(g);
   }
   
   public void paint(Graphics g) {
      Log.instance().trc("In HegemonScrollCanvas.paint(Graphics g)");
      if (!do_paint) {
         do_paint = true;
         return;
      }

      if ((g != null) && 
          (display.getScroll().getProperties().getGraphics() == null)) {
         Log.instance().dbg("HegemonScrollCanvas:  Setting graphics in the Properties.");
         display.getScroll().getProperties().setGraphics(g);
      }

      //Log.it("Actually painting...");
      if (text_components == null) {
         Log.instance().dbg("text_components g is NULL.");
         return;
      }//if

      /* take care of our non-scrollable items.  These components
       * will not scroll with the rest of the stuff.
       */
      if (non_scrollables != null) {
         for (int i = 0; i < non_scrollables.size(); i++) {
            ((ScrollComponent)(non_scrollables.elementAt(i))).paint(g);
         }
      }

      int sz = text_components.size();
      int y = 15;
      
      //Log.it("ScrollCanvas.paint(Graphics g), size:  " + sz);
      ScrollComponent sc = null;
      
      for (int i = 0; i<sz; i++) {
         sc = (ScrollComponent)text_components.elementAt(i);
         sc.paint(g, x_offset, y);
         y += sc.getHeight();
//         Log.it("Height:  " + y);
      }//for
   }//paint
}//HegemonScrollCanvas