control_point.cc

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/*
    Copyright (C) 2002-2007 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 "control_point.h"
#include "automation_line.h"
#include "ardour_ui.h"
#include "public_editor.h"

#include "canvas/rectangle.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;

PBD::Signal1<void, ControlPoint *> ControlPoint::CatchDeletion;

ControlPoint::ControlPoint (AutomationLine& al)
        : _line (al)
{
        _model = al.the_list()->end();
        _view_index = 0;
        _can_slide = true;
        _x = 0;
        _y = 0;
        _shape = Full;
        _size = 4.0;

        _item = new ArdourCanvas::Rectangle (&_line.canvas_group());
        _item->set_fill (true);
        _item->set_fill_color (ARDOUR_UI::config()->color ("control point fill"));
        _item->set_outline_color (ARDOUR_UI::config()->color ("control point outline"));
        _item->set_data ("control_point", this);
        _item->Event.connect (sigc::mem_fun (this, &ControlPoint::event_handler));

        hide ();
}

ControlPoint::ControlPoint (const ControlPoint& other, bool /*dummy_arg_to_force_special_copy_constructor*/)
        : _line (other._line)
{
        if (&other == this) {
                return;
        }

        _model = other._model;
        _view_index = other._view_index;
        _can_slide = other._can_slide;
        _x = other._x;
        _y = other._y;
        _shape = other._shape;
        _size = other._size;

        _item = new ArdourCanvas::Rectangle (&_line.canvas_group());
        _item->set_fill (true);
        _item->set_outline_color (ARDOUR_UI::config()->color ("control point outline"));

        /* NOTE: no event handling in copied ControlPoints */

        hide ();
}

ControlPoint::~ControlPoint ()
{
        CatchDeletion (this); /* EMIT SIGNAL */
        
        delete _item;
}

bool
ControlPoint::event_handler (GdkEvent* event)
{
        return PublicEditor::instance().canvas_control_point_event (event, _item, this);
}

void
ControlPoint::hide ()
{
        _item->hide();
}

void
ControlPoint::show()
{
        _item->show();
}

bool
ControlPoint::visible () const
{
        return _item->visible ();
}

void
ControlPoint::reset (double x, double y, AutomationList::iterator mi, uint32_t vi, ShapeType shape)
{
        _model = mi;
        _view_index = vi;
        move_to (x, y, shape);
}

void
ControlPoint::set_color ()
{
        if (_selected) {
                _item->set_outline_color(ARDOUR_UI::config()->color ("control point selected outline"));;
                _item->set_fill_color(ARDOUR_UI::config()->color ("control point selected fill"));
        } else {
                _item->set_outline_color(ARDOUR_UI::config()->color ("control point outline"));
                _item->set_fill_color(ARDOUR_UI::config()->color ("control point fill"));
        }
}

void
ControlPoint::set_size (double sz)
{
        _size = sz;
        move_to (_x, _y, _shape);
}

void
ControlPoint::move_to (double x, double y, ShapeType shape)
{
        double x1 = 0;
        double x2 = 0;
        double half_size = rint(_size/2.0);

        switch (shape) {
        case Full:
                x1 = x - half_size;
                x2 = x + half_size;
                break;
        case Start:
                x1 = x;
                x2 = x + half_size;
                break;
        case End:
                x1 = x - half_size;
                x2 = x;
                break;
        }

        _item->set (ArdourCanvas::Rect (x1, y - half_size, x2, y + half_size));

        _x = x;
        _y = y;
        _shape = shape;
}

ArdourCanvas::Item&
ControlPoint::item() const 
{
        return *_item;
}