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/*
 * GtkScrollPanePeer.java -- Implements ScrollPanePeer with GTK
 *
 * Copyright (c) 1998 Free Software Foundation, Inc.
 * Written by James E. Blair <corvus@gnu.org>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as published 
 * by the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later verion.
 *
 * This library 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 Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; if not, write to the Free Software Foundation
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
 */
package gnu.java.awt.peer.gtk;
import java.awt.peer.*;
import java.awt.*;

public class GtkScrollPanePeer extends GtkContainerPeer
  implements ScrollPanePeer
{
  int policy;
  int sbHeight, sbWidth;
  ScrollPane myScrollPane;

  native void gtkScrolledWindowNew(ComponentPeer parent,
				   int policy, int w, int h, int[] dims,
				   boolean visible);
  native void gtkScrolledWindowSetScrollPosition(int x, int y);
  native void gtkScrolledWindowSetHScrollIncrement (int u);
  native void gtkScrolledWindowSetVScrollIncrement (int u);
  native void gtkScrolledWindowSetSize(int w, int h);

  public GtkScrollPanePeer(ScrollPane p, ComponentPeer parent)
    {
      super (p);
      System.out.println("new scrollpanepeer");

      myScrollPane=p;
      policy=p.getScrollbarDisplayPolicy();
      
      int mypolicy=1;
      switch (policy)
	{
	case ScrollPane.SCROLLBARS_ALWAYS: mypolicy=1; break;
	case ScrollPane.SCROLLBARS_AS_NEEDED: mypolicy=2; break;
	case ScrollPane.SCROLLBARS_NEVER: mypolicy=3; break;
	}

      Point pnt=p.getLocation();
      Dimension pdim=p.getSize();

      System.out.println(":" + pdim.width + " " + pdim.height);

      int dims[]=new int[2];

      gtkScrolledWindowNew(parent,
			   mypolicy, pdim.width, pdim.height, dims,
			   p.isVisible ());

      sbWidth=dims[0];
      sbHeight=dims[1];
    }

  public void childResized (int w, int h)
    {
      System.out.println("SPP: child resized to: "+ w + " x " + h);

      gtkScrolledWindowSetSize(w, h);
    }

  public int getHScrollbarHeight ()
    {
      return sbHeight;
    }

  public int getVScrollbarWidth ()
    {
      return sbWidth;
    }

  public void setScrollPosition (int x, int y)
    {
      gtkScrolledWindowSetScrollPosition(x, y);
    }

  public void setUnitIncrement (Adjustable adj, int u)
    {
      /* Er... What calls this? */
      
      System.out.println("SPP: setUI: "+adj+":"+u);
      if (adj.getOrientation()==Adjustable.HORIZONTAL)
	gtkScrolledWindowSetHScrollIncrement (u);
      else
	gtkScrolledWindowSetVScrollIncrement (u);
    }

  public void setValue (Adjustable adj, int v)
    {
      System.out.println("SPP: setVal: "+adj+":"+v);
      Point p=myScrollPane.getScrollPosition ();
      if (adj.getOrientation()==Adjustable.HORIZONTAL)
	gtkScrolledWindowSetScrollPosition (v,p.y);
      else
	gtkScrolledWindowSetScrollPosition (p.x,v);
      adj.setValue(v);
    }
}