117 lines
2.7 KiB
C++
117 lines
2.7 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 (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
|
|
*/
|
|
|
|
boost::optional<Rect> r = bounding_box();
|
|
|
|
if (!r) {
|
|
return;
|
|
}
|
|
|
|
Rect self (_position.x + r.get().x0,
|
|
_position.y + r.get().y0,
|
|
_position.x + r.get().x1,
|
|
_position.y + r.get().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
|
|
{
|
|
boost::optional<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
|
|
{
|
|
boost::optional<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);
|
|
}
|