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//
// Pack header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2020 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
/* \file
Fl_Pack widget . */
#ifndef Fl_Pack_H
#define Fl_Pack_H
#include <FL/Fl_Group.H>
/**
This widget was designed to add the functionality of compressing and
aligning widgets.
If type() is Fl_Pack::HORIZONTAL all the children are
resized to the height of the Fl_Pack, and are moved next to
each other horizontally. If type() is not Fl_Pack::HORIZONTAL
then the children are resized to the width and are stacked below each
other. Then the Fl_Pack resizes itself to surround the child widgets.
You may want to put the Fl_Pack inside an Fl_Scroll.
The \p 'resizable()' for Fl_Pack is set to NULL by default. Its behavior
is slightly different than in a normal Fl_Group widget: only if the
resizable() widget is the last widget in the group it is extended to take
the full available width or height, respectively, of the Fl_Pack group.
\note You can nest Fl_Pack widgets or put them inside Fl_Scroll widgets
or inside other group widgets but their behavior can sometimes be
<i>"surprising"</i>. This is partly due to the fact that Fl_Pack widgets
resize themselves during their draw() operation, trying to react on
their child widgets resizing themselves during \b their draw() operations
which can be confusing. If you want to achieve special resize behavior
of nested group widgets it can sometimes be easier to derive your own
specialized group widget than to try to make nested Fl_Pack widgets
behave as expected.
\see Fl_Group::resizable()
*/
class FL_EXPORT Fl_Pack : public Fl_Group {
int spacing_;
public:
enum { // values for type(int)
VERTICAL = 0,
HORIZONTAL = 1
};
protected:
void draw() FL_OVERRIDE;
public:
Fl_Pack(int X, int Y, int W, int H, const char *L = 0);
/**
Gets the number of extra pixels of blank space that are added
between the children.
*/
int spacing() const {return spacing_;}
/**
Sets the number of extra pixels of blank space that are added
between the children.
*/
void spacing(int i) {spacing_ = i;}
/** Returns non-zero if Fl_Pack alignment is horizontal.
\returns non-zero if Fl_Pack alignment is horizontal (Fl_Pack::HORIZONTAL)
\note Currently the return value is the same as Fl_Group::type(), but
this may change in the future. Do not set any other values than the
following with Fl_Pack::type():
- Fl_Pack::VERTICAL (Default)
- Fl_Pack::HORIZONTAL
See class Fl_Pack documentation for details.
*/
uchar horizontal() const {return type();}
void resize(int X, int Y, int W, int H) FL_OVERRIDE;
};
#endif
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