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Fork of C12832 by Chris Styles

TextDisplay.cpp@9:e0e646b7fd20, 2013-10-25 (annotated)

Committer:
sam_grove
Date:
Fri Oct 25 21:35:30 2013 +0000
Revision:
9:e0e646b7fd20
Parent:
4:8d812da33cdc 
Passed name into stream

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:4bbc531be6e2 1 /* mbed TextDisplay Display Library Base Class
dreschpe 0:4bbc531be6e2 2 * Copyright (c) 2007-2009 sford
dreschpe 0:4bbc531be6e2 3 * Released under the MIT License: http://mbed.org/license/mit
dreschpe 0:4bbc531be6e2 4 */
dreschpe 0:4bbc531be6e2 5
dreschpe 0:4bbc531be6e2 6 #include "TextDisplay.h"
dreschpe 0:4bbc531be6e2 7
sam_grove 9:e0e646b7fd20 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
dreschpe 0:4bbc531be6e2 9 _row = 0;
dreschpe 0:4bbc531be6e2 10 _column = 0;
dreschpe 0:4bbc531be6e2 11 if (name == NULL) {
dreschpe 0:4bbc531be6e2 12 _path = NULL;
dreschpe 0:4bbc531be6e2 13 } else {
dreschpe 0:4bbc531be6e2 14 _path = new char[strlen(name) + 2];
dreschpe 0:4bbc531be6e2 15 sprintf(_path, "/%s", name);
dreschpe 0:4bbc531be6e2 16 }
dreschpe 0:4bbc531be6e2 17 }
dreschpe 0:4bbc531be6e2 18
dreschpe 0:4bbc531be6e2 19 int TextDisplay::_putc(int value) {
dreschpe 0:4bbc531be6e2 20 if(value == '\n') {
dreschpe 0:4bbc531be6e2 21 _column = 0;
dreschpe 0:4bbc531be6e2 22 _row++;
dreschpe 0:4bbc531be6e2 23 if(_row >= rows()) {
dreschpe 0:4bbc531be6e2 24 _row = 0;
dreschpe 0:4bbc531be6e2 25 }
dreschpe 0:4bbc531be6e2 26 } else {
dreschpe 0:4bbc531be6e2 27 character(_column, _row, value);
dreschpe 0:4bbc531be6e2 28 _column++;
dreschpe 0:4bbc531be6e2 29 if(_column >= columns()) {
dreschpe 0:4bbc531be6e2 30 _column = 0;
dreschpe 0:4bbc531be6e2 31 _row++;
dreschpe 0:4bbc531be6e2 32 if(_row >= rows()) {
dreschpe 0:4bbc531be6e2 33 _row = 0;
dreschpe 0:4bbc531be6e2 34 }
dreschpe 0:4bbc531be6e2 35 }
dreschpe 0:4bbc531be6e2 36 }
dreschpe 0:4bbc531be6e2 37 return value;
dreschpe 0:4bbc531be6e2 38 }
dreschpe 0:4bbc531be6e2 39
dreschpe 0:4bbc531be6e2 40 // crude cls implementation, should generally be overwritten in derived class
dreschpe 0:4bbc531be6e2 41 void TextDisplay::cls() {
dreschpe 0:4bbc531be6e2 42 locate(0, 0);
dreschpe 0:4bbc531be6e2 43 for(int i=0; i<columns()*rows(); i++) {
dreschpe 0:4bbc531be6e2 44 putc(' ');
dreschpe 0:4bbc531be6e2 45 }
dreschpe 0:4bbc531be6e2 46 }
dreschpe 0:4bbc531be6e2 47
dreschpe 0:4bbc531be6e2 48 void TextDisplay::locate(int column, int row) {
dreschpe 0:4bbc531be6e2 49 _column = column;
dreschpe 0:4bbc531be6e2 50 _row = row;
dreschpe 0:4bbc531be6e2 51 }
dreschpe 0:4bbc531be6e2 52
dreschpe 0:4bbc531be6e2 53 int TextDisplay::_getc() {
dreschpe 0:4bbc531be6e2 54 return -1;
dreschpe 0:4bbc531be6e2 55 }
dreschpe 0:4bbc531be6e2 56
dreschpe 0:4bbc531be6e2 57 void TextDisplay::foreground(uint16_t colour) {
dreschpe 0:4bbc531be6e2 58 _foreground = colour;
dreschpe 0:4bbc531be6e2 59 }
dreschpe 0:4bbc531be6e2 60
dreschpe 0:4bbc531be6e2 61 void TextDisplay::background(uint16_t colour) {
dreschpe 0:4bbc531be6e2 62 _background = colour;
dreschpe 0:4bbc531be6e2 63 }
dreschpe 0:4bbc531be6e2 64
dreschpe 0:4bbc531be6e2 65 bool TextDisplay::claim (FILE *stream) {
dreschpe 0:4bbc531be6e2 66 if ( _path == NULL) {
dreschpe 0:4bbc531be6e2 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
dreschpe 0:4bbc531be6e2 68 return false;
dreschpe 0:4bbc531be6e2 69 }
dreschpe 0:4bbc531be6e2 70 if (freopen(_path, "w", stream) == NULL) {
dreschpe 0:4bbc531be6e2 71 // Failed, should not happen
dreschpe 0:4bbc531be6e2 72 return false;
dreschpe 0:4bbc531be6e2 73 }
dreschpe 0:4bbc531be6e2 74 // make sure we use line buffering
dreschpe 0:4bbc531be6e2 75 setvbuf(stdout, NULL, _IOLBF, columns());
dreschpe 0:4bbc531be6e2 76 return true;
dreschpe 0:4bbc531be6e2 77 }