512 lines
14 KiB
C++
512 lines
14 KiB
C++
/*
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* Copyright (C) 2020 Paul Davis <paul@linuxaudiosystems.com>
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <iostream>
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#include "pbd/unwind.h"
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#include "canvas/canvas.h"
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#include "canvas/cbox.h"
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#include "canvas/constrained_item.h"
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using namespace ArdourCanvas;
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using namespace kiwi;
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using std::cerr;
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using std::endl;
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cBox::cBox (Canvas* c, Orientation o)
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: ConstraintPacker (c)
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, orientation (o)
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, _spacing (0)
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, _top_padding (0)
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, _bottom_padding (0)
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, _left_padding (0)
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, _right_padding (0)
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, _top_margin (0)
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, _bottom_margin (0)
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, _left_margin (0)
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, _right_margin (0)
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, collapse_on_hide (false)
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, homogenous (true)
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{
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}
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cBox::cBox (Item* i, Orientation o)
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: ConstraintPacker (i)
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, orientation (o)
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, _spacing (0)
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, _top_padding (0)
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, _bottom_padding (0)
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, _left_padding (0)
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, _right_padding (0)
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, _top_margin (0)
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, _bottom_margin (0)
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, _left_margin (0)
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, _right_margin (0)
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, collapse_on_hide (false)
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, homogenous (true)
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{
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}
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void
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cBox::set_spacing (double s)
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{
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_spacing = s;
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}
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void
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cBox::set_padding (double top, double right, double bottom, double left)
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{
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double last = top;
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_top_padding = last;
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if (right >= 0) {
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last = right;
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}
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_right_padding = last;
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if (bottom >= 0) {
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last = bottom;
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}
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_bottom_padding = last;
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if (left >= 0) {
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last = left;
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}
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_left_padding = last;
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}
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void
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cBox::set_margin (double top, double right, double bottom, double left)
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{
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double last = top;
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_top_margin = last;
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if (right >= 0) {
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last = right;
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}
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_right_margin = last;
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if (bottom >= 0) {
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last = bottom;
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}
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_bottom_margin = last;
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if (left >= 0) {
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last = left;
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}
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_left_margin = last;
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}
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void
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cBox::remove (Item* item)
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{
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for (Order::iterator t = order.begin(); t != order.end(); ++t) {
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if (&(*t)->item() == item) {
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order.erase (t);
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break;
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}
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}
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ConstraintPacker::remove (item);
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}
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BoxConstrainedItem*
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cBox::pack_start (Item* item, PackOptions primary_axis_opts, PackOptions secondary_axis_opts)
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{
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return pack (item, PackOptions (primary_axis_opts|PackFromStart), secondary_axis_opts);
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}
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BoxConstrainedItem*
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cBox::pack_end (Item* item, PackOptions primary_axis_opts, PackOptions secondary_axis_opts)
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{
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return pack (item, PackOptions (primary_axis_opts|PackFromEnd), secondary_axis_opts);
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}
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BoxConstrainedItem*
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cBox::pack (Item* item, PackOptions primary_axis_opts, PackOptions secondary_axis_opts)
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{
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BoxConstrainedItem* ci = new BoxConstrainedItem (*item, primary_axis_opts, secondary_axis_opts);
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add_constrained_internal (item, ci);
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order.push_back (ci);
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return ci;
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}
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void
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cBox::preferred_size (Duple& min, Duple& natural) const
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{
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Order::size_type n_expanding = 0;
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Order::size_type n_nonexpanding = 0;
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Order::size_type total = 0;
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Distance non_expanding_used = 0;
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Distance largest = 0;
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Distance largest_opposite = 0;
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Duple i_min, i_natural;
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for (Order::const_iterator o = order.begin(); o != order.end(); ++o) {
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(*o)->item().preferred_size (i_min, i_natural);
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// cerr << '\t' << (*o)->item().whoami() << " min " << i_min << " nat " << i_natural << endl;
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if ((*o)->primary_axis_pack_options() & PackExpand) {
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n_expanding++;
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if (orientation == Vertical) {
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if (i_natural.height() > largest) {
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largest = i_natural.height();
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}
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} else {
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if (i_natural.width() > largest) {
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largest = i_natural.width();
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}
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if (i_natural.height() > largest) {
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largest_opposite = i_natural.height();
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}
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}
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} else {
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n_nonexpanding++;
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if (orientation == Vertical) {
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non_expanding_used += i_natural.height();
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} else {
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non_expanding_used += i_natural.width();
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}
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}
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/* determine the maximum size for the opposite axis. All items
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* will be this size or less on this axis
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*/
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if (orientation == Vertical) {
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if (i_natural.width() > largest_opposite) {
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largest_opposite = i_natural.width();
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}
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} else {
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if (i_natural.height() > largest_opposite) {
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largest_opposite = i_natural.height();
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}
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}
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total++;
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}
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Duple r;
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if (orientation == Vertical) {
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// cerr << "+++ vertical box, neu = " << non_expanding_used << " neuo " << non_expanding_used_opposite << " largest = " << largest << " opp " << largest_opposite << " total " << total << endl;
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min.y = non_expanding_used + (n_expanding * largest) + _top_margin + _bottom_margin + ((total - 1) * _spacing);
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min.x = largest_opposite + _left_margin + _right_margin;
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} else {
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// cerr << "+++ horiz box, neu = " << non_expanding_used << " neuo " << non_expanding_used_opposite << " largest = " << largest << " opp " << largest_opposite << " total " << total << endl;
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min.x = non_expanding_used + (n_expanding * largest) + _left_margin + _right_margin + ((total - 1) * _spacing);
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min.y = largest_opposite + _top_margin + _bottom_margin;
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}
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// cerr << whoami() << " preferred-size = " << min << endl;
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natural = min;
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}
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void
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cBox::size_allocate (Rect const & r)
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{
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PBD::Unwinder<bool> uw (in_alloc, true);
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Item::size_allocate (r);
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kiwi::Solver solver;
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double expanded_size;
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Order::size_type n_expanding = 0;
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Order::size_type n_nonexpanding = 0;
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Order::size_type total = 0;
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Distance non_expanding_used = 0;
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for (Order::iterator o = order.begin(); o != order.end(); ++o) {
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if ((*o)->primary_axis_pack_options() & PackExpand) {
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n_expanding++;
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} else {
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n_nonexpanding++;
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Duple min, natural;
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(*o)->item().preferred_size (min, natural);
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if (orientation == Vertical) {
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non_expanding_used += natural.height();
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} else {
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non_expanding_used += natural.width();
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}
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}
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total++;
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}
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if (orientation == Vertical) {
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expanded_size = (r.height() - _top_margin - _bottom_margin - ((total - 1) * _spacing) - non_expanding_used) / n_expanding;
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} else {
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expanded_size = (r.width() - _left_margin - _right_margin - ((total - 1) * _spacing) - non_expanding_used) / n_expanding;
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}
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cerr << "\n\n\n" << whoami() << " SIZE-ALLOC " << r << " expanded items (" << n_expanding << ")will be " << expanded_size << " neu " << non_expanding_used << " t = " << total << " s " << _spacing
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<< " t " << _top_margin << " b " << _bottom_margin << " l " << _left_margin << " r " << _right_margin
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<< endl;
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Order::iterator prev = order.end();
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try {
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for (Order::iterator o = order.begin(); o != order.end(); ++o) {
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Duple min, natural;
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(*o)->item().preferred_size (min, natural);
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if (orientation == Vertical) {
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add_vertical_box_constraints (solver, *o, prev == order.end() ? 0 : *prev, expanded_size, natural.height(), natural.width(), r.width());
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} else {
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add_horizontal_box_constraints (solver, *o, prev == order.end() ? 0 : *prev, expanded_size, natural.width(), natural.height(), r.height());
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}
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prev = o;
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}
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/* There maybe items that were not pack_start()'ed or
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* pack_end()'ed into this box, but just added with
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* constraints. Find all items in the box, and add any
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* constraints that come with them.
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*/
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for (ConstrainedItemMap::const_iterator x = constrained_map.begin(); x != constrained_map.end(); ++x) {
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std::vector<Constraint> const & constraints (x->second->constraints());
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for (std::vector<Constraint>::const_iterator c = constraints.begin(); c != constraints.end(); ++c) {
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solver.addConstraint (*c);
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}
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}
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} catch (std::exception& e) {
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cerr << "Setting up sovler failed: " << e.what() << endl;
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return;
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}
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solver.updateVariables ();
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//solver.dump (cerr);
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//for (ConstrainedItemMap::const_iterator o = constrained_map.begin(); o != constrained_map.end(); ++o) {
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//o->second->dump (cerr);
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//}
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apply (&solver);
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_bounding_box_dirty = true;
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}
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void
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cBox::child_changed (bool bbox_changed)
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{
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}
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/* It would be nice to do this with templates or even by passing ptr-to-method,
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* but both of them interfere with the similarly meta-programming-ish nature of
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* the way that kiwi builds Constraint objects from expressions. So a macro it
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* is ...
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*/
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#define add_box_constraints(\
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solver, \
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bci, \
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prev, \
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expanded_size, \
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natural_main_dimension, \
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natural_second_dimension, \
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alloc_second_dimension, \
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m_main_dimension, \
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m_second_dimension, \
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m_trailing, \
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m_leading, \
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m_trailing_padding, \
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m_leading_padding, \
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m_second_trailing, \
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m_second_leading, \
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m_second_trailing_padding, \
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m_second_leading_padding, \
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m_trailing_margin, \
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m_leading_margin, \
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m_second_trailing_margin, \
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m_second_leading_margin) \
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\
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/* Add constraints that will size the item within this box */ \
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\
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/* set up constraints for expand/fill options, done by \
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* adjusting height and margins of each item \
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*/ \
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\
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if (bci->primary_axis_pack_options() & PackExpand) { \
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\
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/* item will take up more than it's natural \
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* size, if space is available \
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*/ \
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\
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if (bci->primary_axis_pack_options() & PackFill) { \
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\
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/* item is expanding to fill all \
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* available space and wants that space \
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* for itself. \
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*/ \
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\
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solver.addConstraint (bci->m_main_dimension() == expanded_size | kiwi::strength::strong); \
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solver.addConstraint (bci->m_trailing_padding() == 0. | kiwi::strength::strong); \
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solver.addConstraint (bci->m_leading_padding() == 0. | kiwi::strength::strong); \
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\
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} else { \
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\
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/* item is expanding to fill all \
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* available space and wants that space \
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* as padding \
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*/ \
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\
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solver.addConstraint (bci->m_main_dimension() == natural_main_dimension); \
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solver.addConstraint (bci->m_trailing_padding() + bci->m_leading_padding() + bci->m_main_dimension() == expanded_size | kiwi::strength::strong); \
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solver.addConstraint (bci->m_leading_padding() == bci->m_trailing_padding() | kiwi::strength::strong); \
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} \
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\
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} else { \
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\
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/* item is not going to expand to fill \
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* available space. just give it's preferred \
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* height. \
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*/ \
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\
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/* cerr << bci->item().whoami() << " will usenatural height of " << natural.height() << endl; */ \
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\
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solver.addConstraint (bci->m_main_dimension() == natural_main_dimension); \
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solver.addConstraint (bci->m_trailing_padding() == 0.); \
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solver.addConstraint (bci->m_leading_padding() == 0.); \
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} \
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\
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/* now set upper upper edge of the item */ \
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\
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if (prev == 0) { \
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\
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/* first item */ \
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\
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solver.addConstraint (bci->m_trailing() == m_trailing_margin + bci->m_trailing_padding() | kiwi::strength::strong); \
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\
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} else { \
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/* subsequent items */ \
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\
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solver.addConstraint (bci->m_trailing() == prev->m_leading() + prev->m_leading_padding() + bci->m_trailing_padding() + _spacing | kiwi::strength::strong); \
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} \
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\
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solver.addConstraint (bci->m_leading() == bci->m_trailing() + bci->m_main_dimension()); \
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\
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/* set the side-effect variables and/or constants */ \
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\
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solver.addConstraint (bci->m_second_trailing_padding() == 0 | kiwi::strength::weak); \
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solver.addConstraint (bci->m_second_leading_padding() == 0 | kiwi::strength::weak); \
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\
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solver.addConstraint (bci->m_second_trailing() + bci->m_second_dimension() == bci->m_second_leading()); \
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solver.addConstraint (bci->m_second_trailing() == m_second_trailing_margin + bci->m_second_trailing_padding() | kiwi::strength::strong); \
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\
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if (!(bci->secondary_axis_pack_options() & PackExpand) && natural_second_dimension > 0) { \
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solver.addConstraint (bci->m_second_dimension() == natural_second_dimension); \
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} else { \
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solver.addConstraint (bci->m_second_dimension() == alloc_second_dimension - (m_second_trailing_margin + m_second_leading_margin + bci->m_second_leading_padding()) | kiwi::strength::strong); \
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}
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void
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cBox::add_vertical_box_constraints (kiwi::Solver& solver, BoxConstrainedItem* ci, BoxConstrainedItem* prev, double expanded_size, double main_dimension, double second_dimension, double alloc_dimension)
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{
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add_box_constraints (solver, ci, prev, expanded_size, main_dimension, second_dimension, alloc_dimension,
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height, width,
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top, bottom, top_padding, bottom_padding,
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left, right, left_padding, right_padding,
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_top_margin, _bottom_margin, _left_margin, _right_margin);
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}
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void
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cBox::add_horizontal_box_constraints (kiwi::Solver& solver, BoxConstrainedItem* ci, BoxConstrainedItem* prev, double expanded_size, double main_dimension, double second_dimension, double alloc_dimension)
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{
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add_box_constraints (solver, ci, prev, expanded_size, main_dimension, second_dimension, alloc_dimension,
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width, height,
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left, right, left_padding, right_padding,
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top, bottom, top_padding, bottom_padding,
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_left_margin, _right_margin, _top_margin, _bottom_margin);
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}
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void
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cBox::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
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{
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cerr << whoami() << " render f " << fill() << " o " << outline() << " a " << _allocation << endl;
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if (fill() || outline() && _allocation) {
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Rect contents = _allocation;
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/* allocation will have been left with (x0,y0) as given by the
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* parent, but _position is set to the same value and will
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* be taken into account by item_to_window()
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*/
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double width = contents.width() - (_left_margin + _top_margin);
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double height = contents.height() - (_top_margin + _bottom_margin);
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contents.x0 = _left_margin;
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contents.y0 = _top_margin;
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contents.x1 = contents.x0 + width;
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contents.y1 = contents.y0 + height;
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cerr << whoami() << " !!! RI !!! " << width << " x " << height << " @ " << contents.x0 << ", " << contents.y0 << " marg " << _top_margin << endl;
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Rect self (item_to_window (contents, false));
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const Rect draw = self.intersection (area);
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if (fill()) {
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cerr << whoami() << " will fill " << draw << " from contents = " << contents << " from " << _allocation << " self was " << self << " area " << area << endl;
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setup_fill_context (context);
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context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
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context->fill_preserve ();
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}
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if (outline()) {
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if (!fill()) {
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context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
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}
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setup_outline_context (context);
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context->stroke ();
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}
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}
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Item::render_children (area, context);
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|
}
|