/*
* The Mana Client
* Copyright (C) 2007-2010 The Mana World Development Team
*
* This file is part of The Mana Client.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef WIDGET_LAYOUT_H
#define WIDGET_LAYOUT_H
#include <guichan/widgets/container.hpp>
#include <vector>
class LayoutCell;
/**
* This class is a helper for adding widgets to nested tables in a window.
*/
class ContainerPlacer
{
public:
ContainerPlacer(gcn::Container *c = NULL, LayoutCell *l = NULL):
mContainer(c), mCell(l)
{}
/**
* Gets the pointed cell.
*/
LayoutCell &getCell()
{ return *mCell; }
/**
* Returns a placer for the same container but to an inner cell.
*/
ContainerPlacer at(int x, int y);
/**
* Adds the given widget to the container and places it in the layout.
* @see LayoutArray::place
*/
LayoutCell &operator()
(int x, int y, gcn::Widget *, int w = 1, int h = 1);
private:
gcn::Container *mContainer;
LayoutCell *mCell;
};
/**
* This class contains a rectangular array of cells.
*/
class LayoutArray
{
friend class LayoutCell;
public:
LayoutArray();
~LayoutArray();
/**
* Returns a reference on the cell at given position.
*/
LayoutCell &at(int x, int y, int w = 1, int h = 1);
/**
* Places a widget in a given cell.
* @param w number of columns the widget spawns.
* @param h number of rows the widget spawns.
* @note When @a w is 1, the width of column @a x is reset to zero if
* it was AUTO_DEF. Similarly for @a h.
*/
LayoutCell &place(gcn::Widget *, int x, int y, int w = 1, int h = 1);
/**
* Sets the minimum width of a column.
*/
void setColWidth(int n, int w);
/**
* Sets the minimum height of a row.
*/
void setRowHeight(int n, int h);
/**
* Sets the widths of two columns to the maximum of their widths.
*/
void matchColWidth(int n1, int n2);
/**
* Spawns a cell over several columns/rows.
*/
void extend(int x, int y, int w, int h);
/**
* Computes and sets the positions of all the widgets.
* @param nW width of the array, used to resize the AUTO_ columns.
* @param nH height of the array, used to resize the AUTO_ rows.
*/
void reflow(int nX, int nY, int nW, int nH);
private:
// Copy not allowed, as the array owns all its cells.
LayoutArray(LayoutArray const &);
LayoutArray &operator=(LayoutArray const &);
/**
* Gets the position and size of a widget along a given axis
*/
void align(int &pos, int &size, int dim,
LayoutCell const &cell, short *sizes) const;
/**
* Ensures the private vectors are large enough.
*/
void resizeGrid(int w, int h);
/**
* Gets the column/row sizes along a given axis.
* @param upp target size for the array. Ignored if AUTO_DEF.
*/
std::vector< short > getSizes(int dim, int upp) const;
/**
* Gets the total size along a given axis.
*/
int getSize(int dim) const;
std::vector< short > mSizes[2];
std::vector< std::vector < LayoutCell * > > mCells;
char mSpacing;
};
/**
* This class describes the formatting of a widget in the cell of a layout
* table. Horizontally, a widget can either fill the width of the cell (minus
* the cell padding), or it can retain its size and be flushed left, or flush
* right, or centered in the cell. The process is similar for the vertical
* alignment, except that top is represented by LEFT and bottom by RIGHT.
*/
class LayoutCell
{
friend class Layout;
friend class LayoutArray;
public:
enum Alignment
{
LEFT, RIGHT, CENTER, FILL
};
LayoutCell(): mType(NONE) {}
~LayoutCell();
/**
* Sets the padding around the cell content.
*/
LayoutCell &setPadding(int p)
{ mPadding = p; return *this; }
/**
* Sets the horizontal alignment of the cell content.
*/
LayoutCell &setHAlign(Alignment a)
{ mAlign[0] = a; return *this; }
/**
* Sets the vertical alignment of the cell content.
*/
LayoutCell &setVAlign(Alignment a)
{ mAlign[1] = a; return *this; }
/**
* @see LayoutArray::at
*/
LayoutCell &at(int x, int y)
{ return getArray().at(x, y); }
/**
* @see LayoutArray::place
*/
LayoutCell &place(gcn::Widget *wg, int x, int y, int w = 1, int h = 1)
{ return getArray().place(wg, x, y, w, h); }
/**
* @see LayoutArray::matchColWidth
*/
void matchColWidth(int n1, int n2)
{ getArray().matchColWidth(n1, n2); }
/**
* @see LayoutArray::setColWidth
*/
void setColWidth(int n, int w)
{ getArray().setColWidth(n, w); }
/**
* @see LayoutArray::setRowHeight
*/
void setRowHeight(int n, int h)
{ getArray().setRowHeight(n, h); }
/**
* @see LayoutArray::extend.
*/
void extend(int x, int y, int w, int h)
{ getArray().extend(x, y, w, h); }
/**
* Sets the minimum widths and heights of this cell and of all the
* inner cells.
*/
void computeSizes();
private:
// Copy not allowed, as the cell may own an array.
LayoutCell(LayoutCell const &);
LayoutCell &operator=(LayoutCell const &);
union
{
gcn::Widget *mWidget;
LayoutArray *mArray;
};
enum
{
NONE, WIDGET, ARRAY
};
/**
* Returns the embedded array. Creates it if the cell does not contain
* anything yet. Aborts if it contains a widget.
*/
LayoutArray &getArray();
/**
* @see LayoutArray::reflow
*/
void reflow(int nx, int ny, int nw, int nh);
short mSize[2];
char mPadding;
char mExtent[2];
char mAlign[2];
char mNbFill[2];
char mType;
};
/**
* This class is an helper for setting the position of widgets. They are
* positioned along the cells of some rectangular tables. The layout may either
* be a single table or a tree of nested tables.
*
* The size of a given table column can either be set manually or be chosen
* from the widest widget of the column. An empty column has a AUTO_DEF width,
* which means it will be extended so that the layout fits its minimum width.
*
* The process is similar for table rows. By default, there is a spacing of 4
* pixels between rows and between columns, and a margin of 6 pixels around the
* whole layout.
*/
class Layout : public LayoutCell
{
public:
Layout();
/**
* Sets the margin around the layout.
*/
void setMargin(int m)
{ setPadding(m); }
/**
* Sets the positions of all the widgets.
* @see LayoutArray::reflow
*/
void reflow(int &nW, int &nH);
/**
* When the minimum size of the layout is less than the available size,
* the remaining pixels are equally split amongst the FILL items.
*/
enum
{
AUTO_DEF = -42, /**< Default value, behaves like AUTO_ADD. */
AUTO_SET = -43, /**< Uses the share as the new size. */
AUTO_ADD = -44 /**< Adds the share to the current size. */
};
private:
bool mComputed;
};
#endif // WIDGET_LAYOUT_H
