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Dependencies:   mbed

C12832/TextDisplay.cpp@0:2db056248979, 2017-02-06 (annotated)

Committer:
mexinguer
Date:
Mon Feb 06 14:01:12 2017 +0000
Revision:
0:2db056248979
?-?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mexinguer 0:2db056248979 1 /* mbed TextDisplay Display Library Base Class
mexinguer 0:2db056248979 2 * Copyright (c) 2007-2009 sford
mexinguer 0:2db056248979 3 * Released under the MIT License: http://mbed.org/license/mit
mexinguer 0:2db056248979 4 */
mexinguer 0:2db056248979 5
mexinguer 0:2db056248979 6 #include "TextDisplay.h"
mexinguer 0:2db056248979 7
mexinguer 0:2db056248979 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
mexinguer 0:2db056248979 9 _row = 0;
mexinguer 0:2db056248979 10 _column = 0;
mexinguer 0:2db056248979 11 if (name == NULL) {
mexinguer 0:2db056248979 12 _path = NULL;
mexinguer 0:2db056248979 13 } else {
mexinguer 0:2db056248979 14 _path = new char[strlen(name) + 2];
mexinguer 0:2db056248979 15 sprintf(_path, "/%s", name);
mexinguer 0:2db056248979 16 }
mexinguer 0:2db056248979 17 }
mexinguer 0:2db056248979 18
mexinguer 0:2db056248979 19 int TextDisplay::_putc(int value) {
mexinguer 0:2db056248979 20 if(value == '\n') {
mexinguer 0:2db056248979 21 _column = 0;
mexinguer 0:2db056248979 22 _row++;
mexinguer 0:2db056248979 23 if(_row >= rows()) {
mexinguer 0:2db056248979 24 _row = 0;
mexinguer 0:2db056248979 25 }
mexinguer 0:2db056248979 26 } else {
mexinguer 0:2db056248979 27 character(_column, _row, value);
mexinguer 0:2db056248979 28 _column++;
mexinguer 0:2db056248979 29 if(_column >= columns()) {
mexinguer 0:2db056248979 30 _column = 0;
mexinguer 0:2db056248979 31 _row++;
mexinguer 0:2db056248979 32 if(_row >= rows()) {
mexinguer 0:2db056248979 33 _row = 0;
mexinguer 0:2db056248979 34 }
mexinguer 0:2db056248979 35 }
mexinguer 0:2db056248979 36 }
mexinguer 0:2db056248979 37 return value;
mexinguer 0:2db056248979 38 }
mexinguer 0:2db056248979 39
mexinguer 0:2db056248979 40 // crude cls implementation, should generally be overwritten in derived class
mexinguer 0:2db056248979 41 void TextDisplay::cls() {
mexinguer 0:2db056248979 42 locate(0, 0);
mexinguer 0:2db056248979 43 for(int i=0; i<columns()*rows(); i++) {
mexinguer 0:2db056248979 44 putc(' ');
mexinguer 0:2db056248979 45 }
mexinguer 0:2db056248979 46 }
mexinguer 0:2db056248979 47
mexinguer 0:2db056248979 48 void TextDisplay::locate(int column, int row) {
mexinguer 0:2db056248979 49 _column = column;
mexinguer 0:2db056248979 50 _row = row;
mexinguer 0:2db056248979 51 }
mexinguer 0:2db056248979 52
mexinguer 0:2db056248979 53 int TextDisplay::_getc() {
mexinguer 0:2db056248979 54 return -1;
mexinguer 0:2db056248979 55 }
mexinguer 0:2db056248979 56
mexinguer 0:2db056248979 57 void TextDisplay::foreground(uint16_t colour) {
mexinguer 0:2db056248979 58 _foreground = colour;
mexinguer 0:2db056248979 59 }
mexinguer 0:2db056248979 60
mexinguer 0:2db056248979 61 void TextDisplay::background(uint16_t colour) {
mexinguer 0:2db056248979 62 _background = colour;
mexinguer 0:2db056248979 63 }
mexinguer 0:2db056248979 64
mexinguer 0:2db056248979 65 bool TextDisplay::claim (FILE *stream) {
mexinguer 0:2db056248979 66 if ( _path == NULL) {
mexinguer 0:2db056248979 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
mexinguer 0:2db056248979 68 return false;
mexinguer 0:2db056248979 69 }
mexinguer 0:2db056248979 70 if (freopen(_path, "w", stream) == NULL) {
mexinguer 0:2db056248979 71 // Failed, should not happen
mexinguer 0:2db056248979 72 return false;
mexinguer 0:2db056248979 73 }
mexinguer 0:2db056248979 74 // make sure we use line buffering
mexinguer 0:2db056248979 75 setvbuf(stdout, NULL, _IOLBF, columns());
mexinguer 0:2db056248979 76 return true;
mexinguer 0:2db056248979 77 }