// -*- C++ -*-
/**
 * \file XWorkArea.h
 * Copyright 1995-2002 the LyX Team
 * Read the file COPYING
 *
 * \author unknown
 * \author John Levon <moz@compsoc.man.ac.uk>
 */

#ifndef XWORKAREA_H
#define XWORKAREA_H

#ifdef __GNUG__
#pragma interface
#endif

#include FORMS_H_LOCATION
#include "XPainter.h"
#include "frontends/mouse_state.h"
#include "frontends/key_state.h"

#include <boost/signals/signal0.hpp>
#include <boost/signals/signal1.hpp>
#include <boost/signals/signal2.hpp>
#include <boost/signals/signal3.hpp>

#include <utility>

///
class WorkArea {
public:
	///
	WorkArea(int xpos, int ypos, int width, int height);
	///
	~WorkArea();
	///
	Painter & getPainter() { return painter_; }
	///
	int workWidth() const { return work_area->w; }
	///
	int workHeight() const { return work_area->h; }
	///
	unsigned int width() const { return work_area->w + scrollbar->w; }
	//unsigned int width() const { return backgroundbox->w + 15; }
	///
	int xpos() const { return work_area->x; }
	//int xpos() const { return backgroundbox->x; }
	///
	int ypos() const { return work_area->y; }
	//int ypos() const { return backgroundbox->y; }
	///
	void resize(int xpos, int ypos, int width, int height);
	///
	void redraw() const {
		fl_redraw_object(work_area);
		fl_redraw_object(scrollbar);
	}
	///
	void setFocus() const;
	///
	Window getWin() const { return work_area->form->window; }
	///
	bool hasFocus() const { return work_area->focus; }
	///
	bool visible() const { return work_area->form->visible; }
	///
	void greyOut() const;
        ///
        void setScrollbarParams(int height, int pos, int line_height);
	///
	Pixmap getPixmap() const { return workareapixmap; }
	/// xforms callback
	static int work_area_handler(FL_OBJECT *, int event,
				     FL_Coord, FL_Coord,
				     int /*key*/, void * xev);
 
	/// xforms callback from scrollbar
	void scroll_cb();
	/// a selection exists
	void haveSelection(bool) const;
	///
	string const getClipboard() const;
	///
	void putClipboard(string const &) const;
	// Signals
	///
	boost::signal0<void> workAreaExpose;
	///
	boost::signal1<void, int> scrollDocView;
	///
	boost::signal2<void, KeySym, key_modifier::state> workAreaKeyPress;
	///
	boost::signal3<void, int, int, mouse_button::state> workAreaButtonPress;
	///
	boost::signal3<void, int, int, mouse_button::state> workAreaButtonRelease;
	///
	boost::signal3<void, int, int, mouse_button::state> workAreaMotionNotify;
	///
	boost::signal0<void> workAreaFocus;
	///
	boost::signal0<void> workAreaUnfocus;
	///
	boost::signal3<void, int, int, mouse_button::state> workAreaDoubleClick;
	///
	boost::signal3<void, int, int, mouse_button::state> workAreaTripleClick;
	/// emitted when an X client has requested our selection
	boost::signal0<void> selectionRequested;
	/// emitted when another X client has stolen our selection
	boost::signal0<void> selectionLost;

	/// handles SelectionRequest X Event, to fill the clipboard
	int event_cb(XEvent * xev);
private:
	///
	void createPixmap(int, int);

	///
	FL_OBJECT * backgroundbox;
	///
	FL_OBJECT * work_area;
	///
	FL_OBJECT * scrollbar;
	///
	mutable FL_OBJECT * splash_;
	///
	mutable FL_OBJECT * splash_text_;
	/// The pixmap overlay on the workarea
	Pixmap workareapixmap;
	///
	XPainter painter_;
	/// if we call redraw with true needed for locking-insets
	bool screen_cleared;
	/// the current document's height (for scrollbar)
	int doc_height_;
};
 
#endif // XWORKAREA_H