/**
 * The model.
 */
package main

// An abstract model interface.  At a minimum, models must be read only.
type Model interface {
    
    // The dimensions of the model (height, width).
    Dimensions()     (int, int)

    // Returns the value of a cell
    CellValue(r, c int) string
}

// A read/write model.
type RWModel interface {
    Model

    // Resize the model.
    Resize(newRow, newCol int)

    // Sets the cell value
    SetCellValue(r, c int, value string)

    // Returns true if the model has been modified in some way
    IsDirty() bool
}