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AlignBox.C
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1998-11-23
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// $Id: AlignBox.C,v 1.9 1998/11/23 15:00:13 zeller Exp $
// Box alignments
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD 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.
//
// DDD 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 DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
#ifdef __GNUG__
#pragma implementation
#endif
char AlignBox_rcsid[] =
"$Id: AlignBox.C,v 1.9 1998/11/23 15:00:13 zeller Exp $";
#include "assert.h"
#include "misc.h"
#include "AlignBox.h"
DEFINE_TYPE_INFO_1(AlignBox, CompositeBox)
DEFINE_TYPE_INFO_1(HAlignBox, AlignBox)
DEFINE_TYPE_INFO_1(TAlignBox, AlignBox)
DEFINE_TYPE_INFO_1(UAlignBox, AlignBox)
DEFINE_TYPE_INFO_1(VAlignBox, AlignBox)
// Draw alignment (horizontal or vertical)
void AlignBox::drawAlign(Widget w,
const BoxRegion& r,
const BoxRegion& exposed,
GC gc,
bool context_selected,
BoxDimension dimen) const
{
BoxSize space = r.space();
BoxPoint origin = r.origin();
// Compute remaining space and remaining space per child
BoxCoordinate remainder = space[dimen] - size(dimen);
BoxCoordinate remainder_per_extend =
(extend(dimen) == 0 || remainder < 0) ? 0 : remainder / extend(dimen);
BoxCoordinate pixel_stuff =
(extend(dimen) == 0 || remainder < 0) ? 0 : remainder % extend(dimen);
BoxPoint child_origin = origin;
BoxSize child_space = space;
for (int i = 0; i < nchildren(); i++)
{
Box *child = (Box *)(*this)[i];
// If child is extensible, add remaining space per child
child_space[dimen] = child->size(dimen) +
remainder_per_extend * child->extend(dimen);
// Add remaining pixels
if (pixel_stuff > 0)
{
BoxCoordinate stuff = min(remainder_per_extend, pixel_stuff);
child_space[dimen] += stuff;
pixel_stuff -= stuff;
}
// Draw child
child->draw(w,
BoxRegion(child_origin, child_space),
exposed, gc, context_selected);
// Draw next child at offset of CHILD_SPACE
child_origin[dimen] += child_space[dimen];
}
}
// Recompute size
Box *AlignBox::resize()
{
for (int i = 0; i < nchildren(); i++)
{
Box* child = (*this)[i];
if (i == 0)
setSize(child->resize());
else
addSize(child->resize());
}
return this;
}
// HAlignBox
// Add to horizontal alignment
void HAlignBox::addSize(Box *b)
{
thesize() &= b->size();
theextend() &= b->extend();
// Reuse free space in lower right corner
if (b->size(X) > 0)
_corner = b->corner();
}
void HAlignBox::_print(ostream& os,
const BoxRegion& region,
const PrintGC& gc) const
{
int i;
BoxSize space = region.space();
BoxPoint origin = region.origin();
BoxCoordinate rem = space[X] - size(X);
BoxCoordinate perextend =
(extend(X) == 0 || rem <= 0) ? 0 : rem / extend(X);
BoxCoordinate pixels =
(extend(X) == 0 || rem <= 0) ? 0 : rem % extend(X);
BoxPoint child_origin = origin;
BoxSize child_space;
for (i = 0; i < nchildren(); i++ ) {
Box *child = (Box *)(*this)[i];
child_space[Y] = space[Y];
child_space[X] = child->size(X) + perextend * child->extend(X);
if (pixels > 0) {
BoxCoordinate stuff = min(perextend, pixels);
child_space[X] += stuff;
pixels -= stuff;
}
child->_print(os, BoxRegion (child_origin, child_space), gc);
child_origin[X] += child_space[X];
}
}
// VAlignBox
// Add to vertical alignment
void VAlignBox::addSize(Box *b)
{
thesize() |= b->size();
theextend() |= b->extend();
// Compute free space in lower right corner
if (b->size(Y) > 0)
{
_corner[Y] = b->corner()[Y];
_corner[X] = b->extend(X) ? 0 :
size(X) - (b->size(X) - b->corner()[X]);
}
}
void VAlignBox::_print(ostream& os,
const BoxRegion& region,
const PrintGC& gc) const
{
int i;
#if DEBUG
os << "#\n";
os << "# VAlignBox\n";
os << "# Requiered Region:" << region << "\n";
os << "# Actual Size:" << size();
os << "# Extend:" << extend() << "\n";
#endif
BoxPoint origin = region.origin();
BoxSize space = region.space();
BoxCoordinate rem = space[Y] - size(Y);
BoxCoordinate perextend =
(extend(Y) == 0 || rem <= 0) ? 0 : rem / extend(Y);
BoxCoordinate pixels =
(extend(Y) == 0 || rem <= 0) ? 0 : rem % extend(Y);
BoxPoint child_origin = origin;
BoxSize child_space;
for (i = 0; i < nchildren(); i++ ) {
Box *child = (Box *)(*this)[i];
child_space[X] = space[X];
child_space[Y] = child->size(Y) + perextend * child->extend(Y);
if (pixels > 0) {
BoxCoordinate stuff = min (perextend, pixels);
child_space[X] += stuff;
pixels -= stuff;
}
child->_print(os, BoxRegion (child_origin, child_space), gc);
child_origin[Y] += child_space[Y];
}
}
// UAlignBox
// Add box to unaligned alignment
void UAlignBox::addSize(Box *b)
{
thesize() ^= b->size();
theextend() ^= b->extend();
// Reuse free space in lower right corner
if (b->size() > BoxSize(0, 0))
_corner = b->corner();
}
// Draw
void UAlignBox::_draw(Widget w,
const BoxRegion& r,
const BoxRegion& exposed,
GC gc,
bool context_selected) const
{
// Draw all children at the same place
for (int i = 0; i < nchildren(); i++)
{
Box *child = (Box *)(*this)[i];
child->draw(w, r, exposed, gc, context_selected);
}
}
// Print
void UAlignBox::_print(ostream& os,
const BoxRegion& region,
const PrintGC& gc) const
{
for (int i = 0; i < nchildren(); i++) {
(*this)[i]->_print(os, region, gc);
}
}
// TAlignBox
// Add box to textual alignment
void TAlignBox::addSize(Box *b)
{
// Fit into lower right corner
thesize() += (b->size() ^ _corner) - _corner;
theextend() &= b->extend();
// Adapt corner
if (b->size(X) >= _corner[X])
{
// Reuse corner
_corner = b->corner();
}
else
{
// Resize corner
_corner[X] -= b->size(X);
_corner[Y] = max(b->size(Y), _corner[Y]);
}
}
// Draw
void TAlignBox::_draw(Widget w,
const BoxRegion& r,
const BoxRegion& exposed,
GC gc,
bool context_selected) const
{
BoxSize space = r.space();
BoxPoint origin = r.origin();
// If this is non-extensible, use minimal space
if (extend(X) == 0)
space[X] = size(X);
if (extend(Y) == 0)
space[Y] = size(Y);
// Compute remaining space and remaining space per child
BoxCoordinate remainder = space[X] - size(X);
BoxCoordinate remainder_per_extend =
(extend(X) == 0 || remainder < 0) ? 0 : remainder / extend(X);
BoxCoordinate pixel_stuff =
(extend(X) == 0 || remainder < 0) ? 0 : remainder % extend(X);
BoxPoint child_origin = origin;
BoxSize child_space = space;
for (int i = 0; i < nchildren(); i++)
{
Box *child = (Box *)(*this)[i];
// If child is extensible, add remaining space per child
child_space[X] = child->size(X) +
remainder_per_extend * child->extend(X);
// Add remaining pixels
if (pixel_stuff > 0)
{
BoxCoordinate stuff = min(remainder_per_extend, pixel_stuff);
child_space[X] += stuff;
pixel_stuff -= stuff;
}
// Draw child
child->draw(w, BoxRegion(child_origin, child_space),
exposed, gc, context_selected);
// Fit next child into corner
child_origin[X] += (child_space[X] - child->corner()[X]);
child_origin[Y] += (child->size(Y) - child->corner()[Y]);
}
}
void TAlignBox::_print(ostream& os,
const BoxRegion& region,
const PrintGC& gc) const
{
BoxSize space = region.space();
BoxPoint origin = region.origin();
// if not extendible, reduce to minimum space
if (extend(X) == 0)
space[X] = size(X);
if (extend(Y) == 0)
space[Y] = size(Y);
// calculate remaining space and rem. space per child
BoxCoordinate remainder = space[X] - size(X);
BoxCoordinate remainder_per_extend =
(extend(X) == 0 || remainder < 0) ?
0 : remainder / extend(X);
BoxCoordinate pixel_stuff =
(extend(X) == 0 || remainder < 0) ?
0 : remainder % extend(X);
BoxPoint child_origin = origin;
BoxSize child_space = space;
for (int i = 0; i < nchildren(); i++) {
Box *child = (Box *)(*this)[i];
// if child extendible, add space per child
child_space[X] = child->size(X) +
remainder_per_extend * child->extend(X);
// Add remaining space
if (pixel_stuff > 0) {
BoxCoordinate stuff =
min (remainder_per_extend, pixel_stuff);
child_space[X] += stuff;
pixel_stuff -= stuff;
}
// print child
child->_print(os, BoxRegion(child_origin, child_space), gc);
// move child to corner
child_origin[X] += (child_space[X] - child->corner()[X]);
child_origin[Y] += (child->size(Y) - child->corner()[Y]);
}
}