//	*** TODO ***
//	Implement row styles, global styles
//	======================================================================
//	File:    Flv_List.h - Flv_List implementation
//	Program: Flv_List - FLTK Widget
//	Version: 0.1.0
//	Started: 11/21/99
//
//	Copyright (C) 1999 Laurence Charlton
//
//	Description:
//	Flv_List implements a scrollable list.  No data is stored
//	in the widget.  Supports headers/footers, natively supports a single
//	row height per list.	Row grids can be turned on and off.  Supports
//	no scroll bars as well as horizontal/vertical automatic or always
//	on scroll bars.
//	Uses absolute row references.
//
//	row -1 is defined as the row header
//	row -2 is defined as the row footer
//
// 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.
//	======================================================================

#ifndef FLV_LIST_H
#define FLV_LIST_H

#include <FL/Fl.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Scrollbar.H>
#include <FL/Enumerations.H>
#include <Flek/Flv_Style.H>

#define FLV_ROW_HEADER -1
#define FLV_ROW_FOOTER -2
#define FLV_TITLE -3

#define SLIDER_WIDTH 17

typedef unsigned char Flv_ShowScrollbar;
typedef unsigned short Flv_Feature;

//	Call back events
#define FLVE_ROW_CHANGED        1
#define FLVE_ROWS_CHANGED       2
#define FLVE_SELECTION_CHANGED  3
#define FLVE_COL_CHANGED        4
#define FLVE_COLS_CHANGED       5
#define FLVE_FEATURE_CHANGED    6
#define FLVE_CLICKED						7
#define FLVE_ENTER_PRESSED      8
#define FLVE_ROW_HEADER_CLICKED 9
#define FLVE_ROW_FOOTER_CLICKED 10
#define FLVE_COL_HEADER_CLICKED 11
#define FLVE_COL_FOOTER_CLICKED 12
#define FLVE_LABEL_CLICKED			13
#define FLVE_TITLE_CLICKED			14
#define FLVE_ALL_CLICKED				15

//	Call back when flags
#define FLVEcb_ROW_CHANGED        0x0001
#define FLVEcb_ROWS_CHANGED       0x0002
#define FLVEcb_SELECTION_CHANGED  0x0004
#define FLVEcb_COL_CHANGED        0x0008
#define FLVEcb_COLS_CHANGED       0x0010
#define FLVEcb_FEATURE_CHANGED    0x0020
#define FLVEcb_CLICKED						0x0040
#define FLVEcb_ENTER_PRESSED      0x0080
#define FLVEcb_ROW_HEADER_CLICKED 0x0100
#define FLVEcb_ROW_FOOTER_CLICKED 0x0200
#define FLVEcb_COL_HEADER_CLICKED 0x0400
#define FLVEcb_COL_FOOTER_CLICKED 0x0800
#define FLVEcb_LABEL_CLICKED			0x1000
#define FLVEcb_TITLE_CLICKED			0x2000
#define FLVEcb_ALL_CLICKED				0x4000

//	Feature list
#define FLVF_NONE							0
#define FLVF_ROW_HEADER				1
#define FLVF_ROW_FOOTER				2
#define FLVF_ROW_DIVIDER			4
#define FLVF_COL_HEADER				8
#define FLVF_COL_FOOTER			 16
#define FLVF_COL_DIVIDER		 32
#define FLVF_MULTI_SELECT		 64
#define FLVF_ROW_SELECT			128
#define FLVF_PERSIST_SELECT	256
#define FLVF_FULL_RESIZE    512
#define FLVF_DIVIDERS			(FLVF_COL_DIVIDER|FLVF_ROW_DIVIDER)
#define FLVF_HEADERS			(FLVF_ROW_HEADER|FLVF_COL_HEADER)
#define FLVF_FOOTERS			(FLVF_ROW_FOOTER|FLVF_COL_FOOTER)
#define FLVF_ROW_ENDS			(FLVF_ROW_HEADER|FLVF_ROW_FOOTER)
#define FLVF_COL_ENDS			(FLVF_COL_HEADER|FLVF_COL_FOOTER)
#define FLVF_ALL_ROW			(FLVF_ROW_HEADER|FLVF_ROW_FOOTER|FLVF_ROW_DIVIDER)
#define FLVF_ALL_COL			(FLVF_COL_HEADER|FLVF_COL_FOOTER|FLVF_COL_DIVIDER)

//	Scroll bar visibility
#define FLVS_NONE	0
#define FLVS_HORIZONTAL	1
#define FLVS_VERTICAL		2
#define FLVS_BOTH				(FLVS_HORIZONTAL|FLVS_VERTICAL)

#define FLVS_AUTOMATIC	0
#define FLVS_ALWAYS			4

#define FLVS_HORIZONTAL_ALWAYS	(FLVS_HORIZONTAL|FLVS_ALWAYS)
#define FLVS_VERTICAL_ALWAYS		(FLVS_VERTICAL|FLVS_ALWAYS)
#define FLVS_BOTH_ALWAYS				(FLVS_BOTH|FLVS|FLVS_ALWAYS)

//	Edit when constants
#define FLV_EDIT_ALWAYS				1
#define FLV_EDIT_AUTOMATIC    2
#define FLV_EDIT_MANUAL		    3

class Flv_List : public Fl_Group
{
public:
	Fl_Scrollbar scrollbar;		// Vertical scrollbar
	Fl_Scrollbar hscrollbar;	// Horizontal scrollbar

	Flv_List( int X, int Y, int W, int H, const char *l=0 );
	~Flv_List();

	virtual int row_height( int n );
	virtual int row_height( int n, int R );

	virtual void get_style(Flv_Style &s, int R, int C=0);	//	get trickle down style

	void add_selection_style( Flv_Style &s, int R, int C=0 );	//	Add selection style

	virtual void save_editor( Fl_Widget *e, int R, int C=0 );	//	Save editor contents
	virtual void load_editor( Fl_Widget *e, int R, int C=0 );	//	Load editor contents
	virtual void position_editor( Fl_Widget *e, int x, int y, int w, int h, Flv_Style &s );

	int callback_when(void)											//	Get callback when
		{	return vcallback_when;	}
	int callback_when(int v)										//	Set callback when
		{	return vcallback_when = v;	}
	int add_callback_when(int v)								//	Add callback conditions
		{	return vcallback_when |= v;	}
	int clear_callback_when(int v)							//	Clear callback conditions
		{	return vcallback_when &= ~v;	}
	bool callback_on(int v)											//	See if callback should be done
		{	return (vcallback_when & v)==v;	}
	int edit_when(void)													//	Get when to edit
		{	return vedit_when;	}
	int edit_when( int v );											//	Set when to edit

	void start_edit(void);											//	Start editing
	void end_edit(void);												//	End editing (w/save)
	void cancel_edit(void);											//	Cancel editing (wo/save)
	Fl_Widget *editor(void)											//	Return current editor
		{	return veditor;	}
	int bottom_row(void);												//	Return last partially visible row

	unsigned char clicks()											//	# of clicks 1, 2, 3...
		{	return vclicks;	}
	void clear_clicks(void)											//	Reset # of clicks
		{	vclicks = 0;	}
	unsigned char max_clicks(void)							//	Get Max # of clicks
		{	return vmax_clicks;	}
	unsigned char max_clicks(unsigned char n)		//	Return max # of clicks
		{	return vmax_clicks=n;	}

	Fl_Color dead_space_color(void) const				//	Get dead space color
		{	return vdead_space_color;	}
	Fl_Color dead_space_color(Fl_Color &n)			//	Set dead space color
	{	return (vdead_space_color = n);	}

	Flv_Feature feature(void)										//	Get features
		{	return vfeature;	}
	Flv_Feature feature(Flv_Feature v);					//	Set features
	Flv_Feature feature_add(Flv_Feature v);			//	Add (set of) feature(s)
	Flv_Feature feature_remove(Flv_Feature v);	//	Remove (set of) feature(s)
	bool feature_test(Flv_Feature v)						//	Test if (set of) feature(s) on
		{	return ((vfeature&v)==v);	}

	//	Convenience funtions to test if a feature is ON.
	bool row_footer(void)					//	Row footer convenience function
		{	return feature_test(FLVF_ROW_FOOTER);	}
	bool row_header(void)					//	Row header convenience function
		{	return feature_test(FLVF_ROW_HEADER);	}
	bool row_divider(void)				//	Row divider convenience function
		{	return feature_test(FLVF_ROW_DIVIDER);	}
	bool multi_select(void)				//	Multi-select convenience function
		{	return feature_test(FLVF_MULTI_SELECT);	}
	bool persist_select(void)			//	Persistant selection test
		{	return feature_test(FLVF_PERSIST_SELECT);	}
	bool full_resize(void)				//	Full widget resize test
		{	return feature_test(FLVF_FULL_RESIZE);	}

	void get_default_style( Flv_Style &s );	//	Fill in s with default style
	int get_row( int x, int y );						//	Get row from X value

	bool get_cell_bounds( int &X, int &Y, int &W, int &H, int R, int C=0 );

	Flv_ShowScrollbar has_scrollbar(void)	//	Get/set scrollbar visibility
		{	return vhas_scrollbars;	}
	Flv_ShowScrollbar has_scrollbar( Flv_ShowScrollbar v );

	bool move_row(int amount);						//	Change row # by amount

	int row(void)									//	Get/set current row
		{	return vrow;	};
	int row(int n);

	bool row_resizable( int r );					//	Get/Set row locked status
	bool row_resizable( bool n, int r );

	int row_offset(void)					//	Get/Set current row offset
		{	return vrow_offset;	}
	int row_offset( int n );

	int rows(void) 								//	Get/Set total # of rows
		{	return vrows;	};
	int rows(int n);

	int rows_per_page(void)				//	Get/set # of rows / page
		{	return vrows_per_page;	}
	int rows_per_page( int n );		//	Use 0 to allow calculating

	bool row_selected(int n);			//	Is row selected?

	int row_width(void)						//	Get/set total row width
		{	return vrow_width;	};
	int row_width( int n );

	int scrollbar_width(void)			//	Get/set scrollbar thickness
		{	return vscrollbar_width;	}
	int scrollbar_width(int n);

	bool select_locked(void)						//	Allow selecting locked rows/cols?
		{	return vselect_locked;	}
	bool select_locked(bool n)					//	Set whether allowing selection of 
		{	return (vselect_locked=n);	}		//		locked rows/cols

	int select_start_row(void)				//	Get first selected row
		{	return vselect_row;	}
	int select_start_row(int n);			//	Set first selected row

	int top_row(void)									//	Get the current top row
		{	return vtop_row;	}
	int top_row(int v)
		{	return (vtop_row=v);	};			//	Set the top row (Hint only)

  int why_event()										//	Why was the event called?
  	{	return vwhy_event;	}
  int why_event( int n )						//	Set why the event was called
  	{	return (vwhy_event=n);	}

	//	Style routines
	Flv_Style global_style;		//	Global style
	Flv_Style_List row_style;	//	Row styles
protected:
	unsigned char vmax_clicks;										//	Max clicks allowed
	unsigned char vclicks;
	int vedit_when;											//	When does editing start
	int edit_row;
	void switch_editor( int nr );
	Fl_Widget *veditor;									//	Current editor
	bool vediting;											//	Are we editing now?
	int vwhy_event;											//	Why was event called
	int vlast_row;											//	Last row highlighted
	void update_top_row(int H);
	int handle(int event);
	void start_draw(int &X, int &Y, int &W, int &H, int &rw);
	virtual void draw_row( int Offset, int &X, int &Y, int &W, int &H, int R );
	void draw_border(Flv_Style &s, int &X, int &Y, int &W, int &H );
	void client_area( int &X, int &Y, int &W, int &H );
	void draw_scrollbars( int &X, int &Y, int &W, int &H );
	void draw();
	int page_size(void);								//	Calculate useable page size

	int vrow;														//	Current selected row

private:
#ifdef FLEK_FLTK_2
	static Fl_Style* default_style;
#endif
	void check_cursor(void);		//	Check if resizing allowed here
	bool check_resize(void);		//	true if resizing
	int vcallback_when;									//	When to call back
	Fl_Color vdead_space_color;					//	Dead space color
	Flv_ShowScrollbar vhas_scrollbars;	//	determine scroll bar visibility
	Flv_Feature vfeature;								//	Features (Headers, footers, dividers)
	int vrow_offset;										//	Current left offset for display
	int vrow_width;											//	Total pixel width
	int vrows;													//	Total # of rows to display
	int vrows_per_page;									//	# of rows to advance/page
	bool vselect_locked;								//	Selected locked entries or skip?
	int vselect_row;										//	First selected row
	int vscrollbar_width;								//	"thickness" of scrollbar
	int vtop_row;												//	Current top row
};

#endif
