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/*
* Copyright ( C ) 2020 Paul Davis < paul @ linuxaudiosystems . com >
*
* 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 . ,
* 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA .
*/
# include <iostream>
# include "pbd/unwind.h"
# include "canvas/canvas.h"
# include "canvas/cbox.h"
# include "canvas/constrained_item.h"
using namespace ArdourCanvas ;
using namespace kiwi ;
using std : : cerr ;
using std : : endl ;
cBox : : cBox ( Canvas * c , Orientation o )
: ConstraintPacker ( c )
, orientation ( o )
, _spacing ( 0 )
, _top_padding ( 0 )
, _bottom_padding ( 0 )
, _left_padding ( 0 )
, _right_padding ( 0 )
, _top_margin ( 0 )
, _bottom_margin ( 0 )
, _left_margin ( 0 )
, _right_margin ( 0 )
, collapse_on_hide ( false )
, homogenous ( true )
{
}
cBox : : cBox ( Item * i , Orientation o )
: ConstraintPacker ( i )
, orientation ( o )
, _spacing ( 0 )
, _top_padding ( 0 )
, _bottom_padding ( 0 )
, _left_padding ( 0 )
, _right_padding ( 0 )
, _top_margin ( 0 )
, _bottom_margin ( 0 )
, _left_margin ( 0 )
, _right_margin ( 0 )
, collapse_on_hide ( false )
, homogenous ( true )
{
}
void
cBox : : set_spacing ( double s )
{
_spacing = s ;
}
void
cBox : : set_padding ( double top , double right , double bottom , double left )
{
double last = top ;
_top_padding = last ;
if ( right > = 0 ) {
last = right ;
}
_right_padding = last ;
if ( bottom > = 0 ) {
last = bottom ;
}
_bottom_padding = last ;
if ( left > = 0 ) {
last = left ;
}
_left_padding = last ;
}
void
cBox : : set_margin ( double top , double right , double bottom , double left )
{
double last = top ;
_top_margin = last ;
if ( right > = 0 ) {
last = right ;
}
_right_margin = last ;
if ( bottom > = 0 ) {
last = bottom ;
}
_bottom_margin = last ;
if ( left > = 0 ) {
last = left ;
}
_left_margin = last ;
}
void
cBox : : remove ( Item * item )
{
for ( Order : : iterator t = order . begin ( ) ; t ! = order . end ( ) ; + + t ) {
if ( & ( * t ) - > item ( ) = = item ) {
order . erase ( t ) ;
break ;
}
}
ConstraintPacker : : remove ( item ) ;
}
ConstrainedItem *
cBox : : add_constrained ( Item * item )
{
return pack ( item , PackOptions ( 0 ) , PackOptions ( PackExpand | PackFill ) ) ;
}
BoxConstrainedItem *
cBox : : pack_start ( Item * item , PackOptions primary_axis_opts , PackOptions secondary_axis_opts )
{
return pack ( item , PackOptions ( primary_axis_opts | PackFromStart ) , secondary_axis_opts ) ;
}
BoxConstrainedItem *
cBox : : pack_end ( Item * item , PackOptions primary_axis_opts , PackOptions secondary_axis_opts )
{
return pack ( item , PackOptions ( primary_axis_opts | PackFromEnd ) , secondary_axis_opts ) ;
}
BoxConstrainedItem *
cBox : : pack ( Item * item , PackOptions primary_axis_opts , PackOptions secondary_axis_opts )
{
BoxConstrainedItem * ci = new BoxConstrainedItem ( * item , primary_axis_opts , secondary_axis_opts ) ;
add_constrained_internal ( item , ci ) ;
order . push_back ( ci ) ;
return ci ;
}
void
cBox : : preferred_size ( Duple & min , Duple & natural ) const
{
Order : : size_type n_expanding = 0 ;
Order : : size_type n_nonexpanding = 0 ;
Order : : size_type total = 0 ;
Distance non_expanding_used = 0 ;
Distance largest = 0 ;
Distance largest_opposite = 0 ;
Duple i_min , i_natural ;
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cerr < < " cbox::prefsize ( " < < ( orientation = = Vertical ? " vert) " : " horiz) " ) < < endl ;
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for ( Order : : const_iterator o = order . begin ( ) ; o ! = order . end ( ) ; + + o ) {
( * 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 ) {
n_expanding + + ;
if ( orientation = = Vertical ) {
if ( i_natural . height ( ) > largest ) {
largest = i_natural . height ( ) ;
}
if ( i_natural . width ( ) > largest ) {
largest_opposite = i_natural . width ( ) ;
}
} else {
if ( i_natural . width ( ) > largest ) {
largest = i_natural . width ( ) ;
}
if ( i_natural . height ( ) > largest ) {
largest_opposite = i_natural . height ( ) ;
}
}
} else {
n_nonexpanding + + ;
if ( orientation = = Vertical ) {
if ( i_natural . height ( ) > 0 ) {
non_expanding_used + = i_natural . height ( ) ;
} else {
non_expanding_used + = i_min . height ( ) ;
}
} else {
if ( i_natural . width ( ) > 0 ) {
non_expanding_used + = i_natural . width ( ) ;
} else {
non_expanding_used + = i_min . width ( ) ;
}
}
}
total + + ;
}
Duple r ;
if ( orientation = = Vertical ) {
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cerr < < " +++ vertical box, neu = " < < non_expanding_used < < " largest = " < < largest < < " opp " < < largest_opposite < < " total " < < total < < endl ;
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min . x = non_expanding_used + ( n_expanding * largest_opposite ) + _left_margin + _right_margin + ( ( total - 1 ) * _spacing ) ;
min . y = non_expanding_used + ( n_expanding * largest ) + _top_margin + _bottom_margin + ( ( total - 1 ) * _spacing ) ;
} else {
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cerr < < " +++ horiz box, neu = " < < non_expanding_used < < " 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 ) ;
min . y = non_expanding_used + ( n_expanding * largest_opposite ) + _top_margin + _bottom_margin + ( ( total - 1 ) * _spacing ) ;
}
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cerr < < " ++++ " < < whoami ( ) < < " rpref " < < min < < endl ;
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natural = min ;
}
void
cBox : : size_allocate ( Rect const & r )
{
PBD : : Unwinder < bool > uw ( in_alloc , true ) ;
Item : : size_allocate ( r ) ;
kiwi : : Solver solver ;
double expanded_size ;
Order : : size_type n_expanding = 0 ;
Order : : size_type n_nonexpanding = 0 ;
Order : : size_type total = 0 ;
Distance non_expanding_used = 0 ;
for ( Order : : iterator o = order . begin ( ) ; o ! = order . end ( ) ; + + o ) {
if ( ( * o ) - > primary_axis_pack_options ( ) & PackExpand ) {
n_expanding + + ;
} else {
n_nonexpanding + + ;
Duple min , natural ;
( * o ) - > item ( ) . preferred_size ( min , natural ) ;
if ( orientation = = Vertical ) {
non_expanding_used + = natural . height ( ) ;
} else {
non_expanding_used + = natural . width ( ) ;
}
}
total + + ;
}
if ( orientation = = Vertical ) {
expanded_size = ( r . height ( ) - _top_margin - _bottom_margin - ( ( total - 1 ) * _spacing ) - non_expanding_used ) / n_expanding ;
} else {
expanded_size = ( r . width ( ) - _left_margin - _right_margin - ( ( total - 1 ) * _spacing ) - non_expanding_used ) / n_expanding ;
}
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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 < < ' \n ' ;
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Order : : size_type n = 0 ;
Order : : iterator prev = order . end ( ) ;
try {
for ( Order : : iterator o = order . begin ( ) ; o ! = order . end ( ) ; + + o , + + n ) {
Duple min , natural ;
( * o ) - > item ( ) . preferred_size ( min , natural ) ;
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cerr < < " \t " < < ( * o ) - > item ( ) . whoami ( ) < < " min " < < min < < " nat " < < natural < < endl ;
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/* setup center_{x,y} variables in case calling/using
* code wants to use them for additional constraints
*/
solver . addConstraint ( ( * o ) - > center_x ( ) = = ( * o ) - > left ( ) + ( ( * o ) - > width ( ) / 2. ) ) ;
solver . addConstraint ( ( * o ) - > center_y ( ) = = ( * o ) - > top ( ) + ( ( * o ) - > height ( ) / 2. ) ) ;
/* Add constraints that will size the item within this box */
if ( orientation = = Vertical ) {
/* set up constraints for expand/fill options, done by
* adjusting height and margins of each item
*/
if ( ( * o ) - > primary_axis_pack_options ( ) & PackExpand ) {
/* item will take up more than it's natural
* size , if space is available
*/
if ( ( * o ) - > primary_axis_pack_options ( ) & PackFill ) {
/* item is expanding to fill all
* available space and wants that space
* for itself .
*/
solver . addConstraint ( ( * o ) - > height ( ) = = expanded_size | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > top_padding ( ) = = 0. | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > bottom_padding ( ) = = 0. | kiwi : : strength : : strong ) ;
} else {
/* item is expanding to fill all
* available space and wants that space
* as padding
*/
solver . addConstraint ( ( * o ) - > height ( ) = = natural . height ( ) ) ;
solver . addConstraint ( ( * o ) - > top_padding ( ) + ( * o ) - > bottom_padding ( ) + ( * o ) - > height ( ) = = expanded_size | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > bottom_padding ( ) = = ( * o ) - > top_padding ( ) | kiwi : : strength : : strong ) ;
}
} else {
/* item is not going to expand to fill
* available space . just give it ' s preferred
* height .
*/
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cerr < < ( * o ) - > item ( ) . whoami ( ) < < " will use natural height of " < < natural . height ( ) < < endl ;
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solver . addConstraint ( ( * o ) - > height ( ) = = natural . height ( ) ) ;
solver . addConstraint ( ( * o ) - > top_padding ( ) = = 0. ) ;
solver . addConstraint ( ( * o ) - > bottom_padding ( ) = = 0. ) ;
}
/* now set upper left corner of the item */
if ( n = = 0 ) {
/* first item */
solver . addConstraint ( ( * o ) - > top ( ) = = _top_margin + ( * o ) - > top_padding ( ) | kiwi : : strength : : strong ) ;
} else {
/* subsequent items */
solver . addConstraint ( ( * o ) - > top ( ) = = ( * prev ) - > bottom ( ) + ( * prev ) - > bottom_padding ( ) + ( * o ) - > top_padding ( ) + _spacing | kiwi : : strength : : strong ) ;
}
/* set the side-effect variables and/or constants */
solver . addConstraint ( ( * o ) - > left ( ) + ( * o ) - > width ( ) = = ( * o ) - > right ( ) | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > bottom ( ) = = ( * o ) - > top ( ) + ( * o ) - > height ( ) ) ;
solver . addConstraint ( ( * o ) - > left ( ) = = _left_margin + ( * o ) - > left_padding ( ) | kiwi : : strength : : strong ) ;
if ( ! ( ( * o ) - > secondary_axis_pack_options ( ) & PackExpand ) & & natural . width ( ) > 0 ) {
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cerr < < " \t \t also using natural width of " < < natural . width ( ) < < endl ;
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solver . addConstraint ( ( * o ) - > width ( ) = = natural . width ( ) ) ;
} else {
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cerr < < " \t \t also using container width of " < < r . width ( ) < < endl ;
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solver . addConstraint ( ( * o ) - > width ( ) = = r . width ( ) - ( _left_margin + _right_margin + ( * o ) - > right_padding ( ) ) | kiwi : : strength : : strong ) ;
}
} else {
/* set up constraints for expand/fill options, done by
* adjusting width and margins of each item
*/
if ( ( * o ) - > primary_axis_pack_options ( ) & PackExpand ) {
/* item will take up more than it's natural
* size , if space is available
*/
if ( ( * o ) - > primary_axis_pack_options ( ) & PackFill ) {
/* item is expanding to fill all
* available space and wants that space
* for itself .
*/
solver . addConstraint ( ( * o ) - > width ( ) = = expanded_size | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > left_padding ( ) = = 0. | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > right_padding ( ) = = 0. | kiwi : : strength : : strong ) ;
} else {
/* item is expanding to fill all
* available space and wants that space
* as padding
*/
solver . addConstraint ( ( * o ) - > width ( ) = = natural . width ( ) ) ;
solver . addConstraint ( ( * o ) - > left_padding ( ) + ( * o ) - > right_padding ( ) + ( * o ) - > width ( ) = = expanded_size | kiwi : : strength : : strong ) ;
solver . addConstraint ( ( * o ) - > left_padding ( ) = = ( * o ) - > right_padding ( ) | kiwi : : strength : : strong ) ;
}
} else {
/* item is not going to expand to fill
* available space . just give it ' s preferred
* width .
*/
solver . addConstraint ( ( * o ) - > width ( ) = = natural . width ( ) ) ;
solver . addConstraint ( ( * o ) - > left_padding ( ) = = 0. ) ;
solver . addConstraint ( ( * o ) - > right_padding ( ) = = 0. ) ;
}
/* now set upper left corner of the item */
if ( n = = 0 ) {
/* first item */
solver . addConstraint ( ( * o ) - > left ( ) = = _left_margin + ( * o ) - > left_padding ( ) | kiwi : : strength : : strong ) ;
} else {
/* subsequent items */
solver . addConstraint ( ( * o ) - > left ( ) = = ( * prev ) - > right ( ) + ( * prev ) - > right_padding ( ) + ( * o ) - > left_padding ( ) + _spacing | kiwi : : strength : : strong ) ;
}
/* set the side-effect variables and/or constants */
solver . addConstraint ( ( * o ) - > bottom ( ) = = ( * o ) - > top ( ) + ( * o ) - > height ( ) ) ;
solver . addConstraint ( ( * o ) - > right ( ) = = ( * o ) - > left ( ) + ( * o ) - > width ( ) ) ;
solver . addConstraint ( ( * o ) - > top ( ) = = _top_margin + ( * o ) - > top_padding ( ) | kiwi : : strength : : strong ) ;
if ( ! ( ( * o ) - > secondary_axis_pack_options ( ) & PackExpand ) & & natural . height ( ) > 0 ) {
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cerr < < " \t \t and natural height of " < < natural . height ( ) < < endl ;
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solver . addConstraint ( ( * o ) - > height ( ) = = natural . height ( ) ) ;
} else {
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cerr < < " \t \t and container height of " < < r . height ( ) < < endl ;
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solver . addConstraint ( ( * o ) - > height ( ) = = r . height ( ) - ( _top_margin + _bottom_margin + ( * o ) - > bottom_padding ( ) ) | kiwi : : strength : : strong ) ;
}
}
/* Add constraints that come with the item */
std : : vector < Constraint > const & constraints ( ( * o ) - > constraints ( ) ) ;
for ( std : : vector < Constraint > : : const_iterator c = constraints . begin ( ) ; c ! = constraints . end ( ) ; + + c ) {
solver . addConstraint ( * c ) ;
}
prev = o ;
}
} catch ( std : : exception & e ) {
cerr < < " Setting up sovler failed: " < < e . what ( ) < < endl ;
return ;
}
solver . updateVariables ( ) ;
//solver.dump (cerr);
for ( Order : : iterator o = order . begin ( ) ; o ! = order . end ( ) ; + + o , + + n ) {
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( * o ) - > dump ( cerr ) ;
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}
apply ( & solver ) ;
_bounding_box_dirty = true ;
}
void
cBox : : child_changed ( bool bbox_changed )
{
}