/* === S Y N F I G ========================================================= */

/*!	\file widgets/widget_curves.h

**	\brief Template Header

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**	......... ... 2018 Ivan Mahonin

**

**	This package is free software; you can redistribute it and/or

**	modify it under the terms of the GNU General Public License as

**	published by the Free Software Foundation; either version 2 of

**	the License, or (at your option) any later version.

**

**	This package 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

**	General Public License for more details.

**	\endlegal

*/

/* ========================================================================= */

/* === S T A R T =========================================================== */

#ifndef __SYNFIG_STUDIO_WIDGET_CURVES_H

#define __SYNFIG_STUDIO_WIDGET_CURVES_H

/* === H E A D E R S ======================================================= */

#include <list></list>

#include <gtkmm drawingarea.h=""></gtkmm>

#include <gtkmm adjustment.h=""></gtkmm>

#include <synfigapp value_desc.h=""></synfigapp>

#include <synfigapp canvasinterface.h=""></synfigapp>

#include <gui timemodel.h=""></gui>

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfigapp {

namespace Action {

class PassiveGrouper;

}

}

namespace studio {

struct TimePlotData;

class Widget_Curves: public Gtk::DrawingArea

{

private:

	struct Channel;

	struct CurveStruct;

	struct ChannelPoint {

		std::list<curvestruct>::iterator curve_it;</curvestruct>

		synfig::TimePoint time_point;

		int channel_idx;

		ChannelPoint();

		ChannelPoint(std::list<curvestruct>::iterator &curve_it, const synfig::TimePoint time_point, int channel_idx);</curvestruct>

		void invalidate();

		bool is_valid() const;

		bool is_draggable() const;

		bool operator ==(const ChannelPoint &b) const;

		bool operator !=(const ChannelPoint &b) const {return !operator==(b);}

		synfig::Real get_value(synfig::Real time_tolerance) const;

	};

	etl::handle<synfigapp::canvasinterface> canvas_interface;</synfigapp::canvasinterface>

	Glib::RefPtr<gtk::adjustment> range_adjustment;</gtk::adjustment>

	std::list<curvestruct> curve_list;</curvestruct>

	std::list<sigc::connection> value_desc_changed;</sigc::connection>

	TimePlotData * time_plot_data;

	int waypoint_edge_length;

	ChannelPoint hovered_point;

	std::vector<channelpoint> selected_points;</channelpoint>

	bool find_channelpoint_at_position(int pos_x, int pos_y, ChannelPoint & cp);

	bool find_channelpoints_in_rect(Gdk::Rectangle rect, std::vector<channelpoint> & list);</channelpoint>

	enum {POINTER_NONE, POINTER_DRAGGING, POINTER_SELECTING} pointer_state;

	int pointer_tracking_start_x, pointer_tracking_start_y;

	ChannelPoint active_point;

	int active_point_initial_y;

	void start_dragging(const ChannelPoint &pointed_item);

	void drag_to(int pointer_x, int pointer_y);

	void delta_drag(int dx, int dy);

	void finish_dragging();

	void cancel_dragging();

	bool made_dragging_move;

	bool dragging_started_by_key;

	synfigapp::Action::PassiveGrouper *action_group_drag;

	std::vector<std::pair<synfig::waypoint, std::list<curvestruct="">::iterator> > overlapped_waypoints;</std::pair<synfig::waypoint,>

public:

	Widget_Curves();

	~Widget_Curves();

	const Glib::RefPtr<gtk::adjustment>& get_range_adjustment() const { return range_adjustment; }</gtk::adjustment>

	const etl::handle<timemodel>& get_time_model() const;</timemodel>

	void set_time_model(const etl::handle<timemodel> &x);</timemodel>

	void set_value_descs(etl::handle<synfigapp::canvasinterface> canvas_interface_, const std::list<synfigapp::valuedesc> &value_descs);</synfigapp::valuedesc></synfigapp::canvasinterface>

	void clear();

	void refresh();

	void zoom_in();

	void zoom_out();

	void zoom_100();

	void set_zoom(double new_zoom_factor);

	double get_zoom() const;

	void scroll_up();

	void scroll_down();

	void select_all_points();

protected:

	bool on_draw(const Cairo::RefPtr<cairo::context> &cr);</cairo::context>

	bool on_event(GdkEvent *event);

}; // END of class Widget_Curves

}; // END of namespace studio

/* === E N D =============================================================== */

#endif