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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * PlotMM Widget Library
 * Copyright (C) 2004   Andy Thaller
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the LGPL
 *****************************************************************************/

#ifndef PLOTMM_PLOT_H
#define PLOTMM_PLOT_H

#include <map>

#include <gtkmm/drawingarea.h>
#include <gtkmm/table.h>
#include <gtkmm/frame.h>

#include <plotmm/scale.h>
#include <plotmm/rectangle.h>
#include <plotmm/doubleintmap.h>

namespace Gdk {
    class Pixmap;
}
namespace Pango {
    class Layout;
    class FontDescription;
}

namespace PlotMM 
{
    class Curve;

    /*! @brief Class to draw labels in a plot. 
     *
     */
    class PlotLabel : public Gtk::DrawingArea
    {
    public:
	PlotLabel(Gtk::Widget *w,Gtk::Orientation o,const Glib::ustring & ="");
	void set_text(const Glib::ustring &);
	Glib::ustring get_text();
	Pango::FontDescription *font() { return &font_; }

	void set_enabled(bool b);
	bool enabled() const { return enabled_; }

    protected:
	virtual bool on_expose_event(GdkEventExpose* event);
	virtual void on_realize();
	virtual void update_();

	Glib::RefPtr<Gdk::Pixmap> rotate_right_(Glib::RefPtr<Gdk::Pixmap>);
	Glib::RefPtr<Gdk::Pixmap> rotate_left_(Glib::RefPtr<Gdk::Pixmap>);

	Glib::RefPtr<Gdk::Window> window_;
	Glib::RefPtr<Gdk::GC> gc_;
	Pango::FontDescription font_;

    private:
	Glib::RefPtr<Gdk::Pixmap> buffer_;
	Glib::RefPtr<Pango::Layout> layout_;
	Gtk::Widget *widget_;
	Gtk::Orientation orientation_;
	bool tainted_;
	bool enabled_;
    };

    /*! @brief Class to draw curves in a plot. 
     *
     */
    class PlotCanvas : public Gtk::DrawingArea
    {
    public:
	PlotCanvas(Gtk::Widget *w);
	virtual ~PlotCanvas();
	
	virtual bool begin_replot();
	virtual void clear();
	virtual void end_replot();

	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press;
	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release;
	sigc::signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move;

    protected:
	virtual bool on_expose_event(GdkEventExpose* event);
	virtual void on_realize();

	virtual bool on_button_press_event(GdkEventButton* event);
	virtual bool on_button_release_event(GdkEventButton* event);
	virtual bool on_motion_notify_event (GdkEventMotion* event);

	Glib::RefPtr<Gdk::GC> gc_;
	Glib::RefPtr<Gdk::Window> window_;
    private:
	bool replotting_;
	Gdk::Color black_, grey_, white_;
	Gtk::Widget *widget_;
    };

    /*! brief Class relating a curve to a plot. 
     *  
     */
    /*
    class PlotCurve
    {
    public: 
	void set_enabled(bool b) { enabled_= b; }
	bool enabled() { return enabled_; }
    };
    */

    /*! @brief defines available plot axes 
     */
    enum PlotAxisID
    {
	AXIS_TOP,
	AXIS_BOTTOM,
	AXIS_LEFT,
	AXIS_RIGHT
    };

    /*! @brief Class implementing a plot widget.
     *
     */
    class Plot : public Gtk::Frame
    {
    public:
	Plot();
	virtual ~Plot();
	
	int add_curve(const Glib::RefPtr<Curve> &,
		     PlotAxisID xaxis=AXIS_BOTTOM,
		     PlotAxisID yaxis=AXIS_LEFT,
		     bool enable= true);

	void replot();

	PlotLabel *title() { return &title_; }
	Scale *scale(PlotAxisID id) { return tickMark_[id]; }
	PlotLabel *label(PlotAxisID id) { return axisLabel_[id]; }

	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press();
	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release();
	sigc::signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move();

	void set_selection(const Rectangle &r);
	Rectangle get_selection() { return select_; }
	void enable_selection();
	void disable_selection();
	

    protected:
	
	Gtk::Table layout_;
	PlotCanvas canvas_;
	std::vector<Scale*> tickMark_;
	std::vector<ScaleLabels*> tickLabel_;
	std::vector<PlotLabel*> axisLabel_;
	PlotLabel title_;
	virtual bool on_canvas_expose_event(GdkEventExpose* event);
	virtual void draw_selection_();

    private:
	int loop;
	double alpha;
	int curveidx_;
	bool draw_select_;
	Rectangle select_;
	Gdk::Color black_, grey_, white_;
	struct CurveInfo {
	    Glib::RefPtr<Curve> curve;
	    PlotAxisID xaxis;
	    PlotAxisID yaxis;
	};

	std::map<int,CurveInfo> plotDict_;
    };

}

#endif//PLOTMM_PLOT_H