This stops tracks from appearing to scroll up under the rulers, among other things.
108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
/*
|
|
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 "pbd/compose.h"
|
|
|
|
#include "canvas/canvas.h"
|
|
#include "canvas/debug.h"
|
|
#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::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
|
|
*/
|
|
|
|
boost::optional<Rect> r = bounding_box();
|
|
|
|
if (!r) {
|
|
return;
|
|
}
|
|
|
|
Rect self (_position.x, _position.y, _position.x + r.get().width(), _position.y + r.get().height());
|
|
|
|
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 ();
|
|
|
|
Group::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
|
|
{
|
|
boost::optional<Rect> r = bounding_box ();
|
|
|
|
if (!r) {
|
|
return false;
|
|
}
|
|
|
|
return r->contains (d);
|
|
}
|
|
|
|
bool
|
|
ScrollGroup::covers_window (Duple const& d) const
|
|
{
|
|
boost::optional<Rect> r = bounding_box ();
|
|
|
|
if (!r) {
|
|
return false;
|
|
}
|
|
|
|
Rect w = r->translate (-_scroll_offset);
|
|
|
|
return w.contains (d);
|
|
}
|