/*
   NSTableHeaderView.m

   Copyright (C) 1999 Free Software Foundation, Inc.

   Author: Michael Hanni  <mhanni@sprintmail.com>
   Date: 1999
   Skeleton.

   Author: Nicola Pero <n.pero@mi.flashnet.it>
   Date: December 1999
   First actual coding.

   This file is part of the GNUstep GUI Library.

   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 version.

   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; see the file COPYING.LIB.
   If not, write to the Free Software Foundation,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <Foundation/NSArray.h>
#include <AppKit/NSTableHeaderCell.h>
#include <AppKit/NSTableHeaderView.h>
#include <AppKit/NSTableColumn.h>
#include <AppKit/NSTableView.h>
#include <AppKit/NSEvent.h>

@implementation NSTableHeaderView
{
}
/*
 *
 * Class methods
 *
 */
+ (void) initialize
{
  if (self == [NSTableColumn class])
    [self setVersion: 1];
}

/*
 *
 * Instance methods
 *
 */

/*
 * Initializes an instance
 */

// TODO: Remove this method, if not really needed
- (NSTableHeaderView*)initWithFrame:(NSRect)frameRect
{
  self = [super initWithFrame: frameRect];
  _tableView = nil;
  return self;
}
/*
 * Setting the table view 
 */
- (void)setTableView: (NSTableView*)aTableView
{
  // We do not RETAIN aTableView but aTableView is supposed 
  // to RETAIN us.
  _tableView = aTableView;

}
- (NSTableView*)tableView
{
  return _tableView;
}
/*
 * Checking altered columns 
 */
- (int)draggedColumn
{
  // TODO
  return -1;
}
- (float)draggedDistance
{
  // TODO
  return -1;
}
- (int)resizedColumn
{
  // TODO
  return -1;
}
/*
 * Utility methods 
 */
- (int)columnAtPoint: (NSPoint)aPoint
{
  if (_tableView == nil)
    return -1;

  /* Ask to the tableview, which is caching geometry info */
  aPoint = [self convertPoint: aPoint toView: _tableView];
  aPoint.y = [_tableView bounds].origin.y;
  return [_tableView columnAtPoint: aPoint];
}

- (NSRect)headerRectOfColumn: (int)columnIndex
{
  NSRect rect;

  if (_tableView == nil)
    return NSZeroRect;

  /* Ask to the tableview, which is caching geometry info */
  rect = [_tableView rectOfColumn: columnIndex];
  rect = [self convertRect: rect fromView: _tableView];
  rect.origin.y = _bounds.origin.y;
  rect.size.height = _bounds.size.height;
  
  return rect;
}

/*
 * Overidden Methods
 */
- (void)drawRect: (NSRect)aRect
{
  NSArray *columns;
  int firstColumnToDraw;
  int lastColumnToDraw;
  NSRect drawingRect;
  NSTableColumn *column;
  float width;
  int i;

  if (_tableView == nil)
    return;

  firstColumnToDraw = [self columnAtPoint: NSMakePoint (aRect.origin.x,
							aRect.origin.y)];
  if (firstColumnToDraw == -1)
    firstColumnToDraw = 0;

  lastColumnToDraw = [self columnAtPoint: NSMakePoint (NSMaxX (aRect),
						       aRect.origin.y)];
  if (lastColumnToDraw == -1)
    lastColumnToDraw = [_tableView numberOfColumns] - 1;

  drawingRect = [self headerRectOfColumn: firstColumnToDraw];
  
  columns = [_tableView tableColumns];
  
  for (i = firstColumnToDraw; i <= lastColumnToDraw; i++)
    {
      column = [columns objectAtIndex: i];
      width = [column width];
      drawingRect.size.width = width;
      [[column headerCell] drawWithFrame: drawingRect
			   inView: self];
      drawingRect.origin.x += width;
    }
}
-(void)mouseDown: (NSEvent*)event
{
  NSPoint location = [event locationInWindow];
  int clickCount;
  int columnIndex;
  
  clickCount = [event clickCount];
  
  if (clickCount > 2)
    {
      return;
    }
  
  location = [self convertPoint: location fromView: nil];
  columnIndex = [self columnAtPoint: location];
  if (columnIndex == -1)
    {
      return;  
    }

  if (clickCount == 2)
    {
      [_tableView _sendDoubleActionForColumn: columnIndex];
      return;
    }

  // TODO - simple click events
  [super mouseDown: event];
}
@end