mirror of
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132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
/*
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Copyright (C) 2011-2014 Paul Davis
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Author: Carl Hetherington <cth@carlh.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "pbd/compose.h"
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#include "canvas/canvas.h"
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#include "canvas/debug.h"
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#include "canvas/layout.h"
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using namespace std;
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using namespace PBD;
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using namespace ArdourCanvas;
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Layout::Layout (Canvas* canvas)
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: Container (canvas)
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{
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}
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Layout::Layout (Item* parent)
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: Container (parent)
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{
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}
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Layout::Layout (Item* parent, Duple const & p)
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: Container (parent, p)
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{
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}
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/** @param area Area to draw in window coordinates.
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* @param context Context, set up with its origin at this layout's position.
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*/
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void
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Layout::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
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{
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ensure_lut ();
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std::vector<Item*> items = _lut->get (area);
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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cerr << string_compose ("%1GROUP %2 @ %7 render %5 @ %6 %3 items out of %4\n",
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_canvas->render_indent(), (name.empty() ? string ("[unnamed]") : name), items.size(), _items.size(), area, _position, this);
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}
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#endif
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++render_depth;
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for (std::vector<Item*>::const_iterator i = items.begin(); i != items.end(); ++i) {
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if (!(*i)->visible ()) {
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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cerr << _canvas->render_indent() << "Item " << (*i)->whatami() << " [" << (*i)->name << "] invisible - skipped\n";
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}
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#endif
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continue;
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}
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boost::optional<Rect> item_bbox = (*i)->bounding_box ();
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if (!item_bbox) {
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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cerr << _canvas->render_indent() << "Item " << (*i)->whatami() << " [" << (*i)->name << "] empty - skipped\n";
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}
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#endif
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continue;
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}
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Rect item = (*i)->item_to_window (item_bbox.get());
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boost::optional<Rect> d = item.intersection (area);
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if (d) {
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Rect draw = d.get();
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if (draw.width() && draw.height()) {
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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if (dynamic_cast<Container*>(*i) == 0) {
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cerr << _canvas->render_indent() << "render "
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<< ' '
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<< (*i)
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<< ' '
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<< (*i)->whatami()
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<< ' '
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<< (*i)->name
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<< " item "
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<< item_bbox.get()
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<< " window = "
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<< item
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<< " intersect = "
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<< draw
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<< " @ "
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<< _position
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<< endl;
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}
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}
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#endif
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(*i)->render (area, context);
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++render_count;
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}
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} else {
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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cerr << string_compose ("%1skip render of %2 %3, no intersection between %4 and %5\n", _canvas->render_indent(), (*i)->whatami(),
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(*i)->name, item, area);
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}
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#endif
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}
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}
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--render_depth;
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}
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