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#ifndef COLS_HH
#define COLS_HH
#include "glob.hh"
#include "boxes.hh"
#include "list.hh"
#include "item.hh"
/// stuff grouped vertically.
struct PCol {
List<const Item*> its;
List<const Spanner*> stoppers, starters;
/// Can this be broken? true eg. for bars.
bool breakable;
/// does this column have items, does it have spacings attached?
bool used;
/// prebreak is put before end of line.
PCol *prebreak;
/**
if broken here, then (*this) column is discarded, and prebreak
is put at end of line, owned by Col
*/
/// postbreak at beginning of the new line
PCol *postbreak;
/** \See{prebreak}
*/
PCol *daddy;
/*
if this column is pre or postbreak, then this field points to the parent.
*/
/// if lines are broken then this column is in #line#
const Line_of_score *line;
/// if lines are broken then this column x-coord #hpos#
Real hpos;
/****************************************************************/
void add(const Item*i);
Interval width() const;
~PCol();
PCol(PCol * parent);
/// initialize the prebreak and postbreak fields
setup_breaks();
/// which col comes first?
static int compare(const PCol &c1, const PCol &c2);
/**
signed compare on columns.
return < 0 if c1 < c2.
*/
void OK() const;
void set_breakable();
};
/**
This is a class to address items vertically. It contains the data for:
\begin{itemize}
\item
unbroken score
\item
broken score
\item
the linespacing problem
\end{itemize}
*/
#include "compare.hh"
instantiate_compare(const PCol &, PCol::compare);
/// ideal spacing between two columns
struct Idealspacing {
/// the ideal distance
Real space;
/// Hooke's constant: how strong are the "springs" attached to columns
Real hooke;
/// the two columns
const PCol *left, *right;
void OK() const ;
Idealspacing(const PCol *left,const PCol *right);
};
#endif
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