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livetrax/libs/canvas/box.cc

312 lines
5.7 KiB
C++

/*
Copyright (C) 2011-2014 Paul Davis
Author: Carl Hetherington <cth@carlh.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <algorithm>
#include "canvas/box.h"
#include "canvas/rectangle.h"
using namespace ArdourCanvas;
Box::Box (Canvas* canvas, Orientation o)
: Item (canvas)
, orientation (o)
, spacing (0)
, top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
, top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
, homogenous (false)
{
self = new Rectangle (this);
self->set_outline (false);
self->set_fill (false);
}
Box::Box (Item* parent, Orientation o)
: Item (parent)
, orientation (o)
, spacing (0)
, top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
, top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
, homogenous (false)
{
self = new Rectangle (this);
self->set_outline (false);
self->set_fill (false);
}
Box::Box (Item* parent, Duple const & p, Orientation o)
: Item (parent, p)
, orientation (o)
, spacing (0)
, top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
, top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
, homogenous (false)
{
self = new Rectangle (this);
self->set_outline (false);
self->set_fill (false);
}
void
Box::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
Item::render_children (area, context);
}
void
Box::compute_bounding_box () const
{
_bounding_box = Rect();
if (_items.empty()) {
_bounding_box_dirty = false;
return;
}
add_child_bounding_boxes (!collapse_on_hide);
if (_bounding_box) {
Rect r = _bounding_box;
_bounding_box = r.expand (top_padding + outline_width() + top_margin,
right_padding + outline_width() + right_margin,
bottom_padding + outline_width() + bottom_margin,
left_padding + outline_width() + left_margin);
}
_bounding_box_dirty = false;
}
void
Box::set_spacing (double s)
{
spacing = s;
}
void
Box::set_padding (double t, double r, double b, double l)
{
double last = t;
top_padding = t;
if (r >= 0) {
last = r;
}
right_padding = last;
if (b >= 0) {
last = b;
}
bottom_padding = last;
if (l >= 0) {
last = l;
}
left_padding = last;
}
void
Box::set_margin (double t, double r, double b, double l)
{
double last = t;
top_margin = t;
if (r >= 0) {
last = r;
}
right_margin = last;
if (b >= 0) {
last = b;
}
bottom_margin = last;
if (l >= 0) {
last = l;
}
left_margin = last;
}
void
Box::reset_self ()
{
if (_bounding_box_dirty) {
compute_bounding_box ();
}
if (!_bounding_box) {
self->hide ();
return;
}
Rect r (_bounding_box);
/* XXX need to shrink by margin */
self->set (r);
}
void
Box::reposition_children ()
{
Duple previous_edge (0, 0);
Distance largest_width = 0;
Distance largest_height = 0;
Rect uniform_size;
if (homogenous) {
for (std::list<Item*>::iterator i = _items.begin(); ++i != _items.end(); ++i) {
Rect bb = (*i)->bounding_box();
if (bb) {
largest_height = std::max (largest_height, bb.height());
largest_width = std::max (largest_width, bb.width());
}
}
uniform_size = Rect (0, 0, largest_width, largest_height);
}
for (std::list<Item*>::iterator i = _items.begin(); ++i != _items.end(); ++i) {
(*i)->set_position (previous_edge);
if (homogenous) {
(*i)->size_allocate (uniform_size);
}
if (orientation == Vertical) {
Distance shift = 0;
Rect bb = (*i)->bounding_box();
if (!(*i)->visible()) {
/* invisible child */
if (!collapse_on_hide) {
/* still add in its size */
if (bb) {
shift += bb.height();
}
}
} else {
if (bb) {
shift += bb.height();
}
}
previous_edge = previous_edge.translate (Duple (0, spacing + shift));
} else {
Distance shift = 0;
Rect bb = (*i)->bounding_box();
if (!(*i)->visible()) {
if (!collapse_on_hide) {
if (bb) {
shift += bb.width();
}
}
} else {
if (bb) {
shift += bb.width();
}
}
previous_edge = previous_edge.translate (Duple (spacing + shift, 0));
}
}
_bounding_box_dirty = true;
reset_self ();
}
void
Box::pack_end (Item* i, double extra_padding)
{
if (!i) {
return;
}
/* prepend new child */
Item::add_front (i);
reposition_children ();
}
void
Box::pack_start (Item* i, double extra_padding)
{
if (!i) {
return;
}
/* append new child */
Item::add (i);
reposition_children ();
}
void
Box::add (Item* i)
{
pack_start (i);
}
void
Box::child_changed ()
{
/* catch visibility and size changes */
Item::child_changed ();
reposition_children ();
}
void
Box::set_collapse_on_hide (bool yn)
{
if (collapse_on_hide != yn) {
collapse_on_hide = yn;
reposition_children ();
}
}
/*----*/
VBox::VBox (Canvas* c)
: Box (c, Vertical)
{
}
VBox::VBox (Item* i)
: Box (i, Vertical)
{
}
VBox::VBox (Item* i, Duple const & position)
: Box (i, position, Vertical)
{
}
HBox::HBox (Canvas* c)
: Box (c, Horizontal)
{
}
HBox::HBox (Item* i)
: Box (i, Horizontal)
{
}
HBox::HBox (Item* i, Duple const & position)
: Box (i, position, Horizontal)
{
}