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/*
* RTFL
*
* Copyright 2013-2015 Sebastian Geerken <sgeerken@dillo.org>
*
* 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 3 of the License, or
* (at your option) any later version; with the following exception:
*
* The copyright holders of RTFL give you permission to link this file
* statically or dynamically against all versions of the graphviz
* library, which are published by AT&T Corp. under one of the following
* licenses:
*
* - Common Public License version 1.0 as published by International
* Business Machines Corporation (IBM), or
* - Eclipse Public License version 1.0 as published by the Eclipse
* Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "hbox.hh"
using namespace dw::core;
using namespace lout::misc;
namespace rtfl {
namespace dw {
int HBox::CLASS_ID = -1;
HBox::HBox (bool stretchChildren): Box (stretchChildren)
{
DBG_OBJ_CREATE ("rtfl::dw::HBox");
registerName ("rtfl::dw::HBox", &CLASS_ID);
}
HBox::~HBox ()
{
DBG_OBJ_DELETE ();
}
void HBox::sizeAllocateImpl (Allocation *allocation)
{
Allocation allocWOBorders;
allocWOBorders.x = allocation->x + getStyle()->boxOffsetX ();
allocWOBorders.y = allocation->y + getStyle()->boxOffsetY ();
allocWOBorders.width = allocation->width - getStyle()->boxDiffWidth ();
allocWOBorders.ascent = allocation->ascent - getStyle()->boxOffsetY ();
allocWOBorders.descent = allocation->descent - getStyle()->boxRestHeight ();
int sumReqWidth = 0;
for (int i = 0; i < children->size (); i++) {
Requisition childReq;
children->get(i)->sizeRequest (&childReq);
sumReqWidth += childReq.width;
}
bool stretch = stretchChildren && sumReqWidth < allocWOBorders.width;
// Cf. doc/rounding-errors.doc, with: x[i] = child requisition,
// y[i] = child allocation, a = total allocation, b = sumReqWidth.
int cumChildReqWidth = 0, cumChildAllocWidth = 0;
for (int i = 0; i < children->size (); i++) {
Widget *child = children->get (i);
Requisition childReq;
child->sizeRequest (&childReq);
Allocation childAlloc;
childAlloc.x = allocWOBorders.x + cumChildAllocWidth;
childAlloc.y = allocWOBorders.y;
if (stretch) {
cumChildReqWidth += childReq.width;
childAlloc.width = sumReqWidth > 0 ?
safeATimesBDividedByC (cumChildReqWidth, allocWOBorders.width,
sumReqWidth) - cumChildAllocWidth :
0;
childAlloc.ascent = allocWOBorders.ascent;
childAlloc.descent = allocWOBorders.descent;
} else
childAlloc.width = childReq.width;
childAlloc.ascent = allocWOBorders.ascent;
childAlloc.descent = allocWOBorders.descent;
cumChildAllocWidth += childAlloc.width;
child->sizeAllocate (&childAlloc);
//printf ("hbox: %dth child at (%d, %d), %d, (%d x %d)\n",
// i, childAlloc.x, childAlloc.y, childAlloc.width,
// childAlloc.ascent, childAlloc.descent);
}
}
void HBox::accumulateSize (int index, int size, Requisition *totalReq,
Requisition *childReq, int data1)
{
totalReq->width += childReq->width;
totalReq->ascent = max (totalReq->ascent, childReq->ascent);
totalReq->descent = max (totalReq->descent, childReq->descent);
}
void HBox::accumulateExtremes (int index, int size, Extremes *totalExtr,
Extremes *childExtr)
{
totalExtr->minWidth += childExtr->minWidth;
totalExtr->maxWidth += childExtr->maxWidth;
}
} // namespace rtfl
} // namespace dw
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