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Implement Fl_Flowpack.

Which wraps its children and resizes itself vertically to contain them.
tags/non-daw-v1.1.0
Jonathan Moore Liles 14 years ago
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      FL/Fl_Flowpack.H

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/*******************************************************************************/
/* Copyright (C) 2009 Jonathan Moore Liles */
/* */
/* 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; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/

#pragma once

#include <FL/Fl_Group.H>

class Fl_Flowpack : public Fl_Group
{
int _hspacing;
int _vspacing;
int _max_width;

public:

Fl_Flowpack ( int X, int Y, int W, int H, const char *L = 0 )
: Fl_Group( X, Y, W, H, L )
{
resizable( 0 );
_max_width = _hspacing = _vspacing = 0;
}

int max_width ( void ) const { return _max_width; }

void vspacing ( int v ) { _vspacing = v; }
int vspacing ( void ) const { return _vspacing; };

void hspacing ( int h ) { _hspacing = h; }
int hspacing ( void ) const { return _hspacing; };

void
add ( Fl_Widget *w )
{
Fl_Group::add( w );
dolayout();
}

void
remove ( Fl_Widget *w )
{
Fl_Group::remove( w );
dolayout();
}

void
resize ( int X, int Y, int W, int )
{
Fl_Group::resize( X, Y, W, layout( W ) );
}

void
draw ( void )
{
dolayout();
Fl_Group::draw();
}

void dolayout ( void )
{
size( w(), layout( w() ) );
}

int
layout ( int W )
{
resizable( 0 );

int X = 0;
int Y = 0;
int H = 0;

_max_width = 0;

for ( int i = 0; i < children(); ++i )
{
Fl_Widget *o = child( i );

if ( ! o->visible() )
continue;

H = o->h() > H ? o->h() : H;

if ( X + o->w() >= W )
{

Y += H + _vspacing;
H = o->h();
X = 0;
}

o->position( x() + X, y() + Y );

X += o->w() + _hspacing;

if ( X > _max_width )
_max_width = X;
}

return Y + H;
}
};

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