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/*
* Copyright (C) 2014-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2015 David Robillard <d@drobilla.net>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <iostream>
#include "pbd/compose.h"
#include "canvas/canvas.h"
#include "canvas/debug.h"
#include "canvas/scroll_group.h"
using namespace std;
using namespace ArdourCanvas;
ScrollGroup::ScrollGroup (Canvas* c, ScrollSensitivity s)
: Container (c)
, _scroll_sensitivity (s)
{
}
ScrollGroup::ScrollGroup (Item* parent, ScrollSensitivity s)
: Container (parent)
, _scroll_sensitivity (s)
{
}
void
ScrollGroup::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
/* clip the draw to the area that this scroll group nominally occupies
* WITHOUT scroll offsets in effect
*/
Rect r = bounding_box();
if (!r) {
return;
}
Rect self (_position.x + r.x0,
_position.y + r.y0,
_position.x + r.x1,
_position.y + r.y1);
self.x1 = min (_position.x + _canvas->width(), self.x1);
self.y1 = min (_position.y + _canvas->height(), self.y1);
context->save ();
context->rectangle (self.x0, self.y0, self.width(), self.height());
context->clip ();
Container::render (area, context);
context->restore ();
}
void
ScrollGroup::scroll_to (Duple const& d)
{
if (_scroll_sensitivity & ScrollsHorizontally) {
_scroll_offset.x = d.x;
}
if (_scroll_sensitivity & ScrollsVertically) {
_scroll_offset.y = d.y;
}
}
bool
ScrollGroup::covers_canvas (Duple const& d) const
{
Rect r = bounding_box ();
if (!r) {
return false;
}
/* Bounding box is in item coordinates, but we need
to consider the position of the bounding box
within the canvas.
*/
return r.translate (position()).contains (d);
}
bool
ScrollGroup::covers_window (Duple const& d) const
{
Rect r = bounding_box ();
if (!r) {
return false;
}
/* Bounding box is in item coordinates, but we need
to consider the position of the bounding box
within the canvas.
*/
return r.translate (position()).contains (d);
}
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