Change size of the matrix, width and height
Clear the matrix, and put fill in every cell
Write contents of matrix to a QTerminal
insert a matrix into this one at a position
move to a different position to write
read a cell from the matrix
read a complete row from matrix
sets write position to (0, 0)
changes colors for whole matrix
used to write to matrix, call Matrix.setWriteLimits before this
returns number of rows/lines in matrix
returns number of columns in matrix
returns the point ox x-axis where next write will start from
returns the point ox y-axis where next write will start from
Used to store the widget's/terminal's display in a matrix