// -*- C++ -*- //

#ifndef NEWMAPWIN_H

#define NEWMAPWIN_H

class NewMapWin;

#include <all_include.h>

#include <nbtab.h>

#include <libgnomecanvasmm.h>

#include <libgnomecanvasmm/polygon.h>

#include <stack>

///Graphical interface for node/edge map creation.

///This class is responsible for creating a window,

///on which the parameters of a new map can be set.

class NewMapWin : public Gtk::Dialog

{

  ///The \ref NoteBookTab in which the new map has to be placed.

  NoteBookTab & mytab;

public:

  ///Struct to be able to evaluate expressions.

  ///Initial values of map elements can be given

  ///by numbers or by expressions. From expressions

  ///we build first a tree according to the priorities

  ///of operations in the expression. This is the data

  ///structure

  ///that can store one tree element.

  struct tree_node

  {

    ///Character stored in this tree element

    char ch;

    ///Left child of tree element.

    tree_node * left_child;

    ///Right child of tree element.

    tree_node * right_child;

  };

  ///Constructor of NewMapWin.

  ///It creates the widgets shown in

  ///NewMapWin.

  NewMapWin(const std::string& title, NoteBookTab &, bool itisedge=true, bool edgenode=true);

  ///Callback function for OK button. It creates the map.

  ///This function determines whether the input is correct:

  ///the name of new map must not be already used, the expression

  ///that gives tha initial values of map elements has to be valid.

  ///If input is correct it creates and registrates the new map

  ///to the correct place. (\ref mytab)

  virtual void on_response(int response_id);

  ///Close window if Esc key pressed.

  virtual bool closeIfEscapeIsPressed(GdkEventKey*);

  ///Function that creates a tree from an appropriately manipulated string.

  ///Tree is builded according to priorities of operations in expression given by string.

  ///Priorities are indicated in a vector that contains weights for each operation.

  ///\param to_tree string to build tree from

  ///\param weights weights (priorities)

  ///\param offset this function call is recursive. This parameter tells us,

  ///with which part of the string do we have to deal with.

  tree_node * weightedString2Tree(std::string to_tree, std::vector<unsigned int> & weights, int offset);

  ///Function that creates a string from a tree by postorder reading.

  ///This is the last step of creating polishform

  ///from a given expression string.

  ///\param root the root of the tree to read through

  std::string postOrder(tree_node * root);

  ///From the given expression it creates expression given in polish form.

  ///First it substitutes variables and numbers in the given expression.

  ///The substitutions will be one character long local variables.

  ///The substituted-substitution pair is registrated in \ref ch2var.

  ///After that it gives weights fo each character in substituted expression.

  ///Weights are calculated according to the priority of operations in expression.

  ///Then it creates tree (\ref tree_node) from the weighted string. (\ref weightedString2Tree)

  ///\param to_polish the string to turn into polish_form

  ///\param itisedge do we have to create an edgemap or a nodemap.

  ///It is important, because variables are maps and if expression

  ///citates a map that does not exists the expression is not valid.

  ///But to determine, whether the map exists we have to know where

  ///to search for it. And of course for a new edgemap only edgemaps can be serve with values. 

  std::string string2Polishform(std::string to_polish, bool itisedge);

  ///Returns whether a string can be used as value in an expression.

  ///The given string has to be either a mapname or a number. If it is a mapname

  ///we have to know whether it is an edgemap or a nodemap.

  ///\param variable the string about the function has to determine whether it is usable in expressions

  ///\param itisedge should the mapname be between edgemaps, or nodemaps

  bool validVariable(std::string variable, bool itisedge);

  ///Deletes the whole tree created for translating string to polishform.

  ///\param root

  ///root of the tree

  void deleteTree(tree_node * root);

  ///Dictionary of substitutions in expression.

  ///Variables and numbers are substituted with one character long variables in expressions.

  ///This is the dictionary.

  std::map<char, std::string> ch2var;

  ///Entry which gives us the name of new map.

  Gtk::Entry name;

  ///Entry which gives us the initial values of elements of new map.

  ///Initial value can be a number or an expression after that the

  ///initial value for each map element can be calculated.

  Gtk::Entry default_value;

  ///GTK Designing object.

  Gtk::Table * table;

  ///Information holder in window.

  Gtk::Label * label;

  ///If selected, nodemap will be created.

  Gtk::RadioButton node;

  ///If selected, edgemap will be created.

  Gtk::RadioButton edge;

};

#endif //NEWMAPWIN_H