/********************************************************************************
*                                                                               *
*                   M a t r i x   C o n t a i n e r   W i d g e t               *
*                                                                               *
*********************************************************************************
* Copyright (C) 1997,2017 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXMATRIX_H
#define FXMATRIX_H

#ifndef FXPACKER_H
#include "FXPacker.h"
#endif

namespace FX {


/// Matrix packing options
enum {
  MATRIX_BY_ROWS        = 0,              /// Fixed number of rows, add columns as needed
  MATRIX_BY_COLUMNS     = 0x00020000      /// Fixed number of columns, adding rows as needed
  };



/**
* The Matrix layout manager automatically arranges its child windows
* in rows and columns.  If the matrix style is MATRIX_BY_ROWS, then
* the matrix will have the given number of rows and the number of columns
* grows as more child windows are added; if the matrix style is MATRIX_BY_COLUMNS,
* then the number of columns is fixed and the number of rows grows as more children
* are added.
* If all children in a row (column) have the LAYOUT_FILL_ROW (LAYOUT_FILL_COLUMN)
* hint set, then the row (column) will be stretchable as the matrix layout manager
* itself is resized.  If more than one row (column) is stretchable, the space is
* apportioned to each stretchable row (column) proportionally.
* Within each cell of the matrix, all other layout hints are observed.
* For example, a child having LAYOUT_CENTER_Y and LAYOUT_FILL_X hints will
* be centered in the Y-direction, while being stretched in the X-direction.
* Empty cells can be obtained by simply placing a borderless FXFrame widget
* as a space-holder.
*/
class FXAPI FXMatrix : public FXPacker {
  FXDECLARE(FXMatrix)
protected:
  FXint  num;
protected:
  FXMatrix(){}
private:
  FXMatrix(const FXMatrix&);
  FXMatrix &operator=(const FXMatrix&);
public:
  long onFocusUp(FXObject*,FXSelector,void*);
  long onFocusDown(FXObject*,FXSelector,void*);
  long onFocusLeft(FXObject*,FXSelector,void*);
  long onFocusRight(FXObject*,FXSelector,void*);
public:

  /// Construct a matrix layout manager with n rows or columns
  FXMatrix(FXComposite *p,FXint n=1,FXuint opts=MATRIX_BY_ROWS,FXint x=0,FXint y=0,FXint w=0,FXint h=0,FXint pl=DEFAULT_SPACING,FXint pr=DEFAULT_SPACING,FXint pt=DEFAULT_SPACING,FXint pb=DEFAULT_SPACING,FXint hs=DEFAULT_SPACING,FXint vs=DEFAULT_SPACING);

  /// Perform layout
  virtual void layout();

  /// Return default width
  virtual FXint getDefaultWidth();

  /// Return default height
  virtual FXint getDefaultHeight();

  /// Obtain the child placed at a certain row and column
  FXWindow* childAtRowCol(FXint r,FXint c) const;

  /// Return the row in which the given child is placed
  FXint rowOfChild(const FXWindow* child) const;

  /// Return the column in which the given child is placed
  FXint colOfChild(const FXWindow* child) const;

  /// Change the matrix style
  void setMatrixStyle(FXuint ph);

  /// Return the current matrix style
  FXuint getMatrixStyle() const;

  /// Change the number of rows
  void setNumRows(FXint nr);

  /// Return the number of rows
  FXint getNumRows() const;

  /// Change the number of columns
  void setNumColumns(FXint nc);

  /// Return the number of columns
  FXint getNumColumns() const;
  };

}

#endif
