Think about changing backend

[maik-nack]

Class Field This class exists now.

Add fields:

• int[] _colors - an array of colors that used in a puzzle. All cells of the field contain values of colors. But now it will contain indexes of these colors in the array _colors by default.
• int _colorsCount - the length of the array _colors (optional).
• int _state - an identifier that indicates what is stored in the field's cells. Both colors and indexes of these colors can be stored in the cells.

Add methods:

• int getLength(int type) - method for call getRows() or getCols() by the type of a line - row or column.
• int getColor(int i, int j, int type) - method for call getColor(int, int) by the type of a line - row or column.
• void setColor(int i, int j, int color, int type) - method for call setColor(int, int, int) by the type of a line - row or column.
• int getColors() - method for getting count of colors.
• Bitmap getBitmap() - method for getting thumbnail from Field (cell of the field converts in the pixel of the bitmap).
• void clear() - method for clearing field - all cells loss colors.
• Field translateToColors() - method for getting new field with colors in cells.

Add private constructor without parameters. Constructor by a count of rows and columns replaced by constructor by a count of rows and columns, bitmap and parameter for converting.

[maik-nack]

Class Nonogram This class exists now.

Add fields:

• Field _field - the field of the puzzle.

Add methods:

• int getFirstLength(int type) - method for call getLeftRowsLength() or getTopColsLength() by the type of a line - row or column.
• int getSecondLength(int i, int type) - method for call getLeftRowLength(int) or getTopColLength(int) by the type of a line - row or column.
• int getValue(int i, int j, int type) - method for call getLeftRowValue(int, int) or getTopColValue(int, int) by the type of a line - row or column.
• boolean checkCorrectness() - method for checking correctness of filling of the field.
• Field getField() - method for getting field of the puzzle.
• void clearField() - method for clearing field of the puzzle (optional).
• Nonogram translateToColors() - method for getting new nonogram that contains field with colors in cells.

Add private constructor without parameters. Add constructor by a count of rows and columns, bitmap and parameter for converting.

[maik-nack]

For more information about methods by the type of a line see #87 issue.

[maik-nack]

Class Cell. New class. This is the class of the cell of matrix that uses in the algorithm with finite-state machine.

Fields:

• int[][] _dirs (or _vals) - this is the array that contains all directions with their values for concrete cell of the matrix. One direction with value is int[2], where int[0] is direction and int[1] is value. (value = color or index of color).

Methods:

• void addDirection(int dir, int val) - method for adding new direction with value for it.
• boolean isEqualVals() - this method returns true in case if all int[][1] equals. If length of _dirs is zero this method returns false.
• int[][] getDirs() - method for getting array of directions with their values.

Constructor without parameters.

[maik-nack]

Class StateMachine. New class. This is the representation of the finite-state machine. It contains state table.

Fields:

• int[][] _table - state table. Rows - states, columns - input data - indexes of colors.
• int _states - count of states

Methods:

• int getNextState(int state, int input) - method for getting state we can go to from state, if input value is input
• int getStates() - method for getting count of states.

Contructor by the line (int[] line) - numbers from nonogram.

[maik-nack]

Class NonogramSolver. This class exists now.

Fields:

• Nonogram _nono - nonogram that could be solved.
• AsyncTask<Void, Void, Nonogram> _asynkTask - AsyncTask for converting image.
• HashSet _rows, _cols - sets for storage numbers of rows and columns that must be processed.
• HashSet _states - set for storage numbers of states of state machine for algorithm that uses finite-state machine.
• StateMachine[] _rowsFSM, _colsFSM - finite-state machines for nonogram.

Methods:

• void setNonogram(Nonogram nono)
• void setAsyncTask(AsyncTask<Void, Void, Nonogram> asynkTask)
• void init() - initialize state of solver before starting to solve.
• boolean solve() - method for solving puzzle. It returns true if nonogram can be solved.
• boolean applySimpleBoxes(int i, int type) - method for applying algorithm Simple boxes for line with index i with type type (row or column).
• boolean applyStateMachine(int i, int type) - method for applying algorithm with finite-state machine for line with index i with type type (row or column). It returns false if this nonogram hasn't solution.

Constructor without parameters.

[maik-nack]

Class ImageConverter. This class exists now.

Replace method

    public static Field convertImage(
            Bitmap bmp,
            int rows,
            int cols,
            AsyncTask<Void, Void, Field> asyncTask)

by

    public static Nonogram convertImage(
            Bitmap bmp,
            int rows,
            int cols,
            AsyncTask<Void, Void, Nonogram> asyncTask)

Move method getThumbnail in the constructor of Field class.