TextDisplay.cpp

00001 /* mbed TextDisplay Display Library Base Class
00002  * Copyright (c) 2007-2009 sford
00003  * Released under the MIT License: http://mbed.org/license/mit
00004  */
00005 
00006 #include "TextDisplay.h"
00007 
00008 TextDisplay::TextDisplay(const char *name) : Stream(name) {
00009     _row = 0;
00010     _column = 0;
00011 }
00012 
00013 int TextDisplay::_putc(int value) {
00014     if(value == '\n') {
00015         _column = 0;
00016         _row++;
00017         if(_row >= rows()) {
00018             _row = 0;
00019         }
00020     } else {
00021         character(_column, _row, value);
00022         _column++;
00023         if(_column >= columns()) {
00024             _column = 0;
00025             _row++;
00026             if(_row >= rows()) {
00027                 _row = 0;
00028             }
00029         }
00030     }
00031     return value;
00032 }
00033 
00034 // crude cls implementation, should generally be overwritten in derived class
00035 void TextDisplay::cls() {
00036     locate(0, 0);
00037     for(int i=0; i<columns()*rows(); i++) {
00038         putc(' ');
00039     }
00040 }
00041 
00042 void TextDisplay::locate(int column, int row) {
00043     _column = column;
00044     _row = row;
00045 }
00046 
00047 int TextDisplay::_getc() {
00048     return -1;
00049 }
00050 
00051 void TextDisplay::foreground(int colour) {
00052     _foreground = colour;
00053 }
00054 
00055 void TextDisplay::background(int colour) {
00056     _background = colour;
00057 }