non/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>
#include <FL/Fl_Pack.H>
class Fl_Flowpack : public Fl_Group
{
int _hspacing;
int _vspacing;
int _max_width;
bool _flow;
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bool _flowdown;
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;
_flow = true;
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_flowdown = false;
}
virtual ~Fl_Flowpack ( )
{
}
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; };
bool flow ( void ) const { return _flow; }
void flow ( bool v ) { _flow = v; }
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bool flowdown ( void ) const { return _flowdown; }
void flowdown ( bool v ) { _flowdown = v; }
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 H )
{
int NW = W;
int NH = H;
layout( NW, NH );
Fl_Group::resize( X, Y, NW, NH );
}
void
draw ( void )
{
dolayout();
Fl_Group::draw();
}
void dolayout ( void )
{
int H = h();
int W = w();
layout( W, H );
if ( H != h() || W != w() )
size( W, H );
}
void
layout ( int &W, int &H )
{
resizable( 0 );
int X = 0;
int Y = 0;
H = 0;
/* int H = 0; */
_max_width = 0;
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int LW = 0;
int LH = 0;
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int LX = 0;
int LY = 0;
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int RH = 0;
for ( int i = 0; i < children(); ++i )
{
Fl_Widget *o = child( i );
if ( ! o->visible() )
continue;
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if ( _flow )
{
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if ( _flowdown && Y + o->h() < RH )
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{
/* if it'll fit in this column, put it below the previous widget */
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X = LX;
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}
else if ( X + o->w() >= W )
{
/* maybe wrap to the next row */
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H += RH + _vspacing;
RH = 0;
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X = 0;
}
else
{
/* otherwise, put it in the next column */
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Y = H;
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}
}
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RH = o->h() > RH ? o->h() : RH;
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LW = o->w();
LH = o->h();
/* avoid bothering the control with lots of resize() calls */
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LX = X;
LY = Y;
if ( ! ( o->x() == x() + LX &&
o->y() == y() + LY ) )
o->position( x() + LX, y() + LY );
if ( _flow )
{
Y += LH + _vspacing;
X += LW + _hspacing;
}
else
{
if ( type() == Fl_Pack::HORIZONTAL )
{
X += LW + _hspacing;
}
else
{
Y += LH + _vspacing;
}
}
if ( X > _max_width )
_max_width = X;
}
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H += RH;
if ( ! _flow )
W = X;
}
};