/*
    Copyright (C) 2011 Paul Davis

    This program 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 program 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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <gtkmm.h>
#include "gtkmm2ext/keyboard.h"
#include "panner_interface.h"
#include "global_signals.h"

#include "i18n.h"

using namespace std;
using namespace Gtk;
using namespace ARDOUR;
using namespace Gtkmm2ext;

PannerInterface::PannerInterface (boost::shared_ptr<Panner> p)
	: _panner (p)
	, _drag_data_window (0)
	, _drag_data_label (0)
        , _dragging (false)
{
        set_flags (Gtk::CAN_FOCUS);

        add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|
                    Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|
                    Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|
                    Gdk::SCROLL_MASK|
                    Gdk::POINTER_MOTION_MASK);

}

PannerInterface::~PannerInterface ()
{
	delete _drag_data_window;
}

void
PannerInterface::show_drag_data_window ()
{
        if (!_drag_data_window) {
		_drag_data_window = new Window (WINDOW_POPUP);
		_drag_data_window->set_name (X_("ContrastingPopup"));
		_drag_data_window->set_position (WIN_POS_MOUSE);
		_drag_data_window->set_decorated (false);
		
		_drag_data_label = manage (new Label);
		_drag_data_label->set_use_markup (true);
		
		_drag_data_window->set_border_width (6);
		_drag_data_window->add (*_drag_data_label);
		_drag_data_label->show ();
		
		Window* toplevel = dynamic_cast<Window*> (get_toplevel());
		if (toplevel) {
			_drag_data_window->set_transient_for (*toplevel);
		}
	}

	set_drag_data ();
	
        if (!_drag_data_window->is_visible ()) {
                /* move the window a little away from the mouse */
                int rx, ry;
                get_window()->get_origin (rx, ry);
                _drag_data_window->move (rx, ry + get_height());
                _drag_data_window->present ();
        }
}

void
PannerInterface::hide_drag_data_window ()
{
        if (_drag_data_window) {
                _drag_data_window->hide ();
        }
}

bool
PannerInterface::on_enter_notify_event (GdkEventCrossing *)
{
	grab_focus ();
	Keyboard::magic_widget_grab_focus ();

	_drag_data_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &PannerInterface::drag_data_timeout), 500);
	
	return false;
}

bool
PannerInterface::drag_data_timeout ()
{
	show_drag_data_window ();
	return false;
}

bool
PannerInterface::on_leave_notify_event (GdkEventCrossing *)
{
	Keyboard::magic_widget_drop_focus ();

	_drag_data_timeout.disconnect ();
	if (!_dragging) {
		hide_drag_data_window ();
	}
	
	return false;
}

bool
PannerInterface::on_key_release_event (GdkEventKey*)
{
	return false;
}

void
PannerInterface::value_change ()
{
	set_drag_data ();
	queue_draw ();
}