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/*
Copyright (C) 2014 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 <iostream>
#include "canvas/scroll_group.h"
using namespace std;
using namespace ArdourCanvas;
ScrollGroup::ScrollGroup (Group* parent, ScrollSensitivity s)
: Group (parent)
, _scroll_sensitivity (s)
{
}
ScrollGroup::ScrollGroup (Group* parent, Duple position, ScrollSensitivity s)
: Group (parent, position)
, _scroll_sensitivity (s)
{
}
void
ScrollGroup::scroll_to (Duple const& d)
{
Duple base_pos (position().translate (_scroll_offset));
if (_scroll_sensitivity & ScrollsHorizontally) {
base_pos.x -= d.x;
_scroll_offset.x = d.x;
}
if (_scroll_sensitivity & ScrollsVertically) {
base_pos.y -= d.y;
_scroll_offset.y = d.y;
}
set_position (base_pos);
}
Duple
ScrollGroup::canvas_position() const
{
/* return the normal "base" position of this item
rather its position as affected by any scroll
offset.
*/
return _position.translate (_scroll_offset);
}
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