/*
* Aethyra
* Copyright (C) 2007 The Mana World Development Team
*
* This file is part of Aethyra based on original code
* from The Mana World.
*
* 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
* 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <cassert>
#include "layout.h"
ContainerPlacer ContainerPlacer::at(int x, int y)
{
return ContainerPlacer(mContainer, &mCell->at(x, y));
}
LayoutCell &ContainerPlacer::operator()
(int x, int y, gcn::Widget *wg, int w, int h)
{
mContainer->add(wg);
return mCell->place(wg, x, y, w, h);
}
LayoutCell::~LayoutCell()
{
if (mType == ARRAY) delete mArray;
}
LayoutArray &LayoutCell::getArray()
{
assert(mType != WIDGET);
if (mType == ARRAY) return *mArray;
mArray = new LayoutArray;
mType = ARRAY;
mExtent[0] = 1;
mExtent[1] = 1;
mPadding = 0;
mAlign[0] = FILL;
mAlign[1] = FILL;
return *mArray;
}
void LayoutCell::reflow(int nx, int ny, int nw, int nh)
{
assert(mType != NONE);
nx += mPadding;
ny += mPadding;
nw -= 2 * mPadding;
nh -= 2 * mPadding;
if (mType == ARRAY)
mArray->reflow(nx, ny, nw, nh);
else
mWidget->setDimension(gcn::Rectangle(nx, ny, nw, nh));
}
void LayoutCell::computeSizes()
{
assert(mType == ARRAY);
for (std::vector< std::vector< LayoutCell * > >::iterator
i = mArray->mCells.begin(), i_end = mArray->mCells.end();
i != i_end; ++i)
{
for (std::vector< LayoutCell * >::iterator
j = i->begin(), j_end = i->end(); j != j_end; ++j)
{
LayoutCell *cell = *j;
if (cell && cell->mType == ARRAY) cell->computeSizes();
}
}
mSize[0] = mArray->getSize(0);
mSize[1] = mArray->getSize(1);
}
LayoutArray::LayoutArray(): mSpacing(4)
{
}
LayoutArray::~LayoutArray()
{
for (std::vector< std::vector< LayoutCell * > >::iterator
i = mCells.begin(), i_end = mCells.end(); i != i_end; ++i)
{
for (std::vector< LayoutCell * >::iterator
j = i->begin(), j_end = i->end(); j != j_end; ++j)
{
delete *j;
}
}
}
LayoutCell &LayoutArray::at(int x, int y, int w, int h)
{
resizeGrid(x + w, y + h);
LayoutCell *&cell = mCells[y][x];
if (!cell)
{
cell = new LayoutCell;
}
return *cell;
}
void LayoutArray::resizeGrid(int w, int h)
{
bool extW = w && w > (int)mSizes[0].size(),
extH = h && h > (int)mSizes[1].size();
if (!extW && !extH) return;
if (extH)
{
mSizes[1].resize(h, Layout::AUTO_DEF);
mCells.resize(h);
if (!extW) w = mSizes[0].size();
}
if (extW)
{
mSizes[0].resize(w, Layout::AUTO_DEF);
}
for (std::vector< std::vector< LayoutCell * > >::iterator
i = mCells.begin(), i_end = mCells.end(); i != i_end; ++i)
{
i->resize(w, NULL);
}
}
void LayoutArray::setColWidth(int n, int w)
{
resizeGrid(n + 1, 0);
mSizes[0][n] = w;
}
void LayoutArray::setRowHeight(int n, int h)
{
resizeGrid(0, n + 1);
mSizes[1][n] = h;
}
void LayoutArray::matchColWidth(int n1, int n2)
{
resizeGrid(std::max(n1, n2) + 1, 0);
std::vector< short > widths = getSizes(0, Layout::AUTO_DEF);
int s = std::max(widths[n1], widths[n2]);
mSizes[0][n1] = s;
mSizes[0][n2] = s;
}
void LayoutArray::extend(int x, int y, int w, int h)
{
LayoutCell &cell = at(x, y, w, h);
cell.mExtent[0] = w;
cell.mExtent[1] = h;
}
LayoutCell &LayoutArray::place(gcn::Widget *widget, int x, int y, int w, int h)
{
LayoutCell &cell = at(x, y, w, h);
assert(cell.mType == LayoutCell::NONE);
cell.mType = LayoutCell::WIDGET;
cell.mWidget = widget;
cell.mSize[0] = w == 1 ? widget->getWidth() : 0;
cell.mSize[1] = h == 1 ? widget->getHeight() : 0;
cell.mExtent[0] = w;
cell.mExtent[1] = h;
cell.mPadding = 0;
cell.mAlign[0] = LayoutCell::FILL;
cell.mAlign[1] = LayoutCell::FILL;
short &cs = mSizes[0][x], &rs = mSizes[1][y];
if (cs == Layout::AUTO_DEF && w == 1) cs = 0;
if (rs == Layout::AUTO_DEF && h == 1) rs = 0;
return cell;
}
void LayoutArray::align(int &pos, int &size, int dim,
LayoutCell const &cell, short *sizes) const
{
int size_max = sizes[0];
for (int i = 1; i < cell.mExtent[dim]; ++i)
size_max += sizes[i] + mSpacing;
size = std::min<int>(cell.mSize[dim], size_max);
switch (cell.mAlign[dim])
{
case LayoutCell::LEFT:
return;
case LayoutCell::RIGHT:
pos += size_max - size;
return;
case LayoutCell::CENTER:
pos += (size_max - size) / 2;
return;
case LayoutCell::FILL:
size = size_max;
return;
}
}
std::vector< short > LayoutArray::getSizes(int dim, int upp) const
{
int gridW = mSizes[0].size(), gridH = mSizes[1].size();
std::vector< short > sizes = mSizes[dim];
// Compute minimum sizes.
for (int gridY = 0; gridY < gridH; ++gridY)
{
for (int gridX = 0; gridX < gridW; ++gridX)
{
LayoutCell const *cell = mCells[gridY][gridX];
if (!cell || cell->mType == LayoutCell::NONE) continue;
if (cell->mExtent[dim] == 1)
{
int n = dim == 0 ? gridX : gridY;
int s = cell->mSize[dim] + cell->mPadding * 2;
if (s > sizes[n]) sizes[n] = s;
}
}
}
if (upp == Layout::AUTO_DEF) return sizes;
// Compute the FILL sizes.
int nb = sizes.size();
int nbFill = 0;
for (int i = 0; i < nb; ++i)
{
if (mSizes[dim][i] <= Layout::AUTO_DEF)
{
++nbFill;
if (mSizes[dim][i] == Layout::AUTO_SET ||
sizes[i] <= Layout::AUTO_DEF)
{
sizes[i] = 0;
}
}
upp -= sizes[i] + mSpacing;
}
upp = upp + mSpacing;
if (nbFill == 0) return sizes;
for (int i = 0; i < nb; ++i)
{
if (mSizes[dim][i] > Layout::AUTO_DEF) continue;
int s = upp / nbFill;
sizes[i] += s;
upp -= s;
--nbFill;
}
return sizes;
}
int LayoutArray::getSize(int dim) const
{
std::vector< short > sizes = getSizes(dim, Layout::AUTO_DEF);
int size = 0;
int nb = sizes.size();
for (int i = 0; i < nb; ++i)
{
if (sizes[i] > Layout::AUTO_DEF) size += sizes[i];
size += mSpacing;
}
return size - mSpacing;
}
void LayoutArray::reflow(int nx, int ny, int nw, int nh)
{
int gridW = mSizes[0].size(), gridH = mSizes[1].size();
std::vector< short > widths = getSizes(0, nw);
std::vector< short > heights = getSizes(1, nh);
int y = ny;
for (int gridY = 0; gridY < gridH; ++gridY)
{
int x = nx;
for (int gridX = 0; gridX < gridW; ++gridX)
{
LayoutCell *cell = mCells[gridY][gridX];
if (cell && cell->mType != LayoutCell::NONE)
{
int dx = x, dy = y, dw, dh;
align(dx, dw, 0, *cell, &widths[gridX]);
align(dy, dh, 1, *cell, &heights[gridY]);
cell->reflow(dx, dy, dw, dh);
}
x += widths[gridX] + mSpacing;
}
y += heights[gridY] + mSpacing;
}
}
Layout::Layout(): mComputed(false)
{
getArray();
setPadding(6);
}
void Layout::reflow(int &nw, int &nh)
{
if (!mComputed)
{
computeSizes();
mComputed = true;
}
nw = nw == 0 ? mSize[0] + 2 * mPadding : nw;
nh = nh == 0 ? mSize[1] + 2 * mPadding : nh;
LayoutCell::reflow(0, 0, nw, nh);
}