tmk_core/tool/mbed/mbed-sdk/libraries/tests/mbed/freopen/TextDisplay.h

   1 /* mbed TextDisplay Library Base Class
   2  * Copyright (c) 2007-2009 sford
   3  * Released under the MIT License: http://mbed.org/license/mit
   4  *
   5  * A common base class for Text displays
   6  * To port a new display, derive from this class and implement
   7  * the constructor (setup the display), character (put a character
   8  * at a location), rows and columns (number of rows/cols) functions.
   9  * Everything else (locate, printf, putc, cls) will come for free
  10  *
  11  * The model is the display will wrap at the right and bottom, so you can
  12  * keep writing and will always get valid characters. The location is
  13  * maintained internally to the class to make this easy
  14  */
  15
  16 #ifndef MBED_TEXTDISPLAY_H
  17 #define MBED_TEXTDISPLAY_H
  18
  19 #include "mbed.h"
  20
  21 class TextDisplay : public Stream {
  22 public:
  23
  24     // functions needing implementation in derived implementation class
  25     TextDisplay(const char *name = NULL);
  26     virtual void character(int column, int row, int c) = 0;
  27     virtual int rows() = 0;
  28     virtual int columns() = 0;
  29
  30     // functions that come for free, but can be overwritten
  31     virtual void cls();
  32     virtual void locate(int column, int row);
  33     virtual void foreground(int colour);
  34     virtual void background(int colour);
  35     // putc (from Stream)
  36     // printf (from Stream)
  37
  38 protected:
  39
  40     virtual int _putc(int value);
  41     virtual int _getc();
  42
  43     // character location
  44     short _column;
  45     short _row;
  46
  47     // colours
  48     int _foreground;
  49     int _background;
  50 };
  51
  52 #endif