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/**
* Yudit Unicode Editor Source File
*
* GNU Copyright (C) 2002 Gaspar Sinai <gsinai@yudit.org>
* GNU Copyright (C) 2001 Gaspar Sinai <gsinai@yudit.org>
* GNU Copyright (C) 2000 Gaspar Sinai <gsinai@yudit.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* dated June 1991. See file COPYYING for details.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "swidget/SLayout.h"
#include <stdio.h>
SLayout::SLayout (void) : lc(0,0), rc(0,0), dlc(0,0), drc(0,0)
{
}
/**
* The layout looks like this:
* lc-------------+
* | |
* | |
* +-------------rc
* When resize happens the lc is moved by dlc *(lc-newlc)
* so these are deltas. The unit for deltas are 1000, so resizing
* by unit 1 is achieved by 100.
* Example a component that has a minimum size of 100 and grows
* twice when resized:
* lc.x lc.y rc.y rc.y dlc.x dlc.y drc.x drc.y
* 0, 0, 10, 10 0, 0 100, 100
* it will also move down if:
* 0, 0, 10, 10 0, 100 100, 100
* it will also move right if:
* 0, 0, 10, 10 100, 0 100, 100
*/
SLayout::SLayout (const SLocation& _lc, const SLocation _rc,
const SLocation& _dlc, const SLocation _drc) :
lc (_lc), rc (_rc), dlc(_dlc), drc(_drc)
{
}
SLayout::SLayout (const SLocation& _lc, const SLocation _rc)
: lc (_lc), rc (_rc)
{
dlc = SLocation (100, 100);
drc = SLocation (100, 100);
}
SLayout::SLayout (const SDimension& _rc) : rc (_rc)
{
lc = SLocation (0, 0);
dlc = SLocation (100, 100);
drc = SLocation (100, 100);
}
/**
* copy the layout.
*/
SLayout::SLayout (const SLayout& l)
{
lc = l.lc;
rc = l.rc;
dlc = l.dlc;
drc = l.drc;
}
SLayout
SLayout::operator = (const SLayout& l)
{
lc = l.lc;
rc = l.rc;
dlc = l.dlc;
drc = l.drc;
return *this;
}
SLayout::~SLayout ()
{
}
/**
* Add layout to this to make a bigger layout.
*/
SLayout
SLayout::operator += (const SLayout l)
{
if (l.rc.x > rc.x) rc.x = l.rc.x;
if (l.rc.y > rc.y) rc.y = l.rc.y;
return *this;
}
bool
SLayout::isEmpty() const
{
return (lc == rc && rc == drc && drc == dlc && dlc == SLocation(0,0));
}
/**
* This is in fact the minimum size.
*/
SDimension
SLayout::getDimension () const
{
SLocation delta = rc - lc;
if (delta.x < 0) delta.x = 2;
if (delta.y < 0) delta.y = 2;
return SDimension (delta.x, delta.y);
}
/**
* This is in fact the minimum size.
*/
SLocation
SLayout::getLocation () const
{
SLocation min = lc;
return SLocation (min.minmerge(rc));
}
/**
* Suppose in is the parent layout. we are resized.
* @return the new location of this child component.
*/
SLocation
SLayout::getLocation (const SLayout& parent, const SDimension& d) const
{
SLocation l(d.width, d.height);
SLocation delta = l - (parent.rc-parent.lc);
//fprintf (stderr, "dim=%u,%u delta=%d,%d parent=%d,%d\n",
// d.width, d.height,
// delta.x, delta.y, parent.rc.x, parent.rc.y);
SLocation lnew (lc.x + (delta.x * dlc.x) / 100,
lc.y + (delta.y * dlc.y) / 100);
/*
NEW
if (lnew.x < lc.x) lnew.x = lc.x;
if (lnew.y < lc.y) lnew.y = lc.y;
*/
return SLocation (lnew);
}
void SLayout::print()
{
fprintf (stderr, "Layout lc=%d %d / %d%% %d%%\n", lc.x, lc.y, dlc.x, dlc.y);
fprintf (stderr, "Layout rc=%d %d / %d%% %d%%\n", rc.x, rc.y, drc.x, drc.y);
}
/**
* Suppose in is the parent layout. we are resized.
* @return the new dimension of this child component.
*/
SDimension
SLayout::getDimension (const SLayout& parent, const SDimension& d) const
{
SLocation l(d.width, d.height);
SLocation delta = l - (parent.rc - parent.lc);
SLocation lnew (rc.x + (delta.x * drc.x) / 100,
rc.y + (delta.y * drc.y) / 100);
/*
NEW
if (lnew.x <= rc.x) lnew.x = rc.x +1;
if (lnew.y <= rc.y) lnew.y = rc.y +1;
*/
SLocation left = getLocation (parent, d);
if (lnew.x <= left.x) lnew.x = left.x+1;
if (lnew.y <= left.y) lnew.y = left.y+1;
return SDimension (lnew.x - left.x, lnew.y - left.y);
}
bool
SLayout::operator == (const SLayout l) const
{
return (lc == l.lc && rc == l.rc && dlc == l.dlc && drc == l.drc);
}
bool
SLayout::operator != (const SLayout l) const
{
return (lc != l.lc || rc != l.rc || dlc != l.dlc || drc != l.drc);
}
/**
* Accept the layout. This layout has to change.
* becomes this size.
* We should not call this with an empty layout.
* @param old is the layout this layout was attached to.
* @param nl is the layout this layout will be attached to.
*/
void
SLayout::setLayout (const SLayout& old, const SLayout& nl)
{
if (old.isEmpty() || nl.isEmpty()) return;
SDimension d = getDimension (old, nl.getDimension());
SLocation l = getLocation (old, nl.getDimension());
lc = l;
rc = l + SLocation (d);
}
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