//|
//| Dockable window widget for the Fast Light Tool Kit (FLTK).
//|
//| Copyright 1998-1999 by Vivality llc, Venice, CA, U.S.A. 
//|  and Matthias Melcher.
//|
//| 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; if not, write to the Free Software
//| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
//| USA.
//|
//| Please report all bugs and problems to "matthias@mediaone.net".
//|

// There are two widget classes in this module.
// Fl_Dock is derived from Fl_New_Tile and adds some functionality.
//   - The user can move all widgets around within the Fl_Dock.
//   - The user can drag widgets out of the Fl_Dock. They will appear as
//     seperate windows on the desktop (Fl_Dockable)
//   - The user can drag those windows back into the Fl_Dock.
//     Fl_Dock tries to make smart decissions about placing.
// Fl_Dockable is derived from Fl_Group. The Fl_Dock takes care of generating
// Fl_Dockable widgets

// 08/25/1999: 
//  - improved docking and undocking behaviour, still lots to do
//  - created a way to have "free spots" that are generated and removed as required (canReplace)
//  - created prefered resizable widgets that fill free space if possible (canMerge)

// planned: docking into an FL_Tab
// planned: callback to let application know we docked/undocked etc.

/* sample usage

void main() {
  Fl_Window *w = new Fl_Window(50, 50, 300, 300, "Fl_Dock test");
  Fl_Dock *t = new Fl_Dock(20, 20, 260, 260);
  Fl_Box *w1 = new Fl_Box(FL_DOWN_BOX, 20, 20, 140, 130, "");
  w1->color(FL_RED);
  Fl_Box *w2 = new Fl_Box(FL_DOWN_BOX, 20+140, 20, 120, 130, "");
  w2->color(FL_GREEN);
  Fl_Box *w3 = new Fl_Box(FL_DOWN_BOX, 20, 20+130, 130, 130, "");
  w3->color(FL_BLUE);
  Fl_Box *w4 = new Fl_Box(FL_DOWN_BOX, 20+130, 20+130, 130, 130, "");
  w4->color(FL_YELLOW);
  t->end();
  w->end();
  w->resizable(t);

  Fl_Window *x = new Fl_Window(400, 50, 120, 60, "Fl_Dockable");
  Fl_Dockable *x1 = new Fl_Dockable(0, 0, 120, 60);
  x1->docks_to(t);
  Fl_Box *w5 = new Fl_Box(FL_DOWN_BOX, 0, 0, 120, 60, "");
  w5->color(FL_MAGENTA);
  x1->end();
  x->end();
	  
  w->show(); x->show();

  Fl::run();
}
				
*/



#include <Fl/Fl_Widget.H>
#include "Fl_New_Tile.H"
#include <Fl/Fl_Group.H>


class Fl_Dock : public Fl_New_Tile {
public:
  Fl_Dock(int x, int y, int w, int h, char *t=0L); 
  virtual	~Fl_Dock();
  char		takeOut(Fl_Widget*);		   
  void		putIn(Fl_Widget*, int, int);
  void		canMerge(Fl_Widget*, int cando);
  int		canMerge(Fl_Widget*);
  char		mergeRemove(Fl_Widget*);
  void		canReplace(Fl_Widget*, int cando);
  int		canReplace(Fl_Widget*);
  char		addReplace(Fl_Widget*, Fl_Widget*);
  Fl_Widget	*findReplace();
protected:
  int		handle(int);
  void		putIn(Fl_Widget*, Fl_Widget*, char);
  Fl_Widget	*dockWhere(int, int, char&);
  void		reparent(Fl_Widget*, int, int);
  Fl_Widget	**mergeList;
  int		nMergeList, NMergeList;
  Fl_Widget	**replaceList;
  int		nReplaceList, NReplaceList;
};



class Fl_Dockable : public Fl_Group {
public:
  Fl_Dockable(int x, int y, int w, int h, char *t=0L) : Fl_Group(x, y, w, h, t) { dock_ = 0L; }
  void		docks_to(Fl_Dock *d) { dock_ = d; }
protected:
  int		handle(int);
  Fl_Dock	*dock_;
};