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/* mbed TextDisplay Library Base Class
* Copyright (c) 2007-2009 sford
* Released under the MIT License: http://mbed.org/license/mit
*
* A common base class for Text displays
* To port a new display, derive from this class and implement
* the constructor (setup the display), character (put a character
* at a location), rows and columns (number of rows/cols) functions.
* Everything else (locate, printf, putc, cls) will come for free
*
* The model is the display will wrap at the right and bottom, so you can
* keep writing and will always get valid characters. The location is
* maintained internally to the class to make this easy
*/
#ifndef MBED_TEXTDISPLAY_H
#define MBED_TEXTDISPLAY_H
#include "mbed.h"
class TextDisplay : public Stream {
public:
// functions needing implementation in derived implementation class
TextDisplay(const char *name = NULL);
virtual void character(int column, int row, int c) = 0;
virtual int rows() = 0;
virtual int columns() = 0;
// functions that come for free, but can be overwritten
virtual void cls();
virtual void locate(int column, int row);
virtual void foreground(int colour);
virtual void background(int colour);
// putc (from Stream)
// printf (from Stream)
protected:
virtual int _putc(int value);
virtual int _getc();
// character location
short _column;
short _row;
// colours
int _foreground;
int _background;
};
#endif
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