Mercurial > hp34970-firmware / file comparison
comparison: lib/unigraphic/TextDisplay.cpp
lib/unigraphic/TextDisplay.cpp
- changeset 5
- f1c85c2500f2
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| 4:219766126afb | 5:f1c85c2500f2 |
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| 1 /* mbed TextDisplay Display Library Base Class | |
| 2 * Copyright (c) 2007-2009 sford | |
| 3 * Released under the MIT License: http://mbed.org/license/mit | |
| 4 */ | |
| 5 | |
| 6 #include "TextDisplay.h" | |
| 7 | |
| 8 TextDisplay::TextDisplay(const char *name) : Stream(name){ | |
| 9 _row = 0; | |
| 10 _column = 0; | |
| 11 if (name == NULL) { | |
| 12 _path = NULL; | |
| 13 } else { | |
| 14 _path = new char[strlen(name) + 2]; | |
| 15 sprintf(_path, "/%s", name); | |
| 16 } | |
| 17 } | |
| 18 | |
| 19 int TextDisplay::_putc(int value) { | |
| 20 if(value == '\n') { | |
| 21 _column = 0; | |
| 22 _row++; | |
| 23 if(_row >= rows()) { | |
| 24 _row = 0; | |
| 25 } | |
| 26 } else { | |
| 27 character(_column, _row, value); | |
| 28 _column++; | |
| 29 if(_column >= columns()) { | |
| 30 _column = 0; | |
| 31 _row++; | |
| 32 if(_row >= rows()) { | |
| 33 _row = 0; | |
| 34 } | |
| 35 } | |
| 36 } | |
| 37 return value; | |
| 38 } | |
| 39 | |
| 40 // crude cls implementation, should generally be overwritten in derived class | |
| 41 void TextDisplay::cls() { | |
| 42 locate(0, 0); | |
| 43 for(int i=0; i<columns()*rows(); i++) { | |
| 44 putc(' '); | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 void TextDisplay::locate(int column, int row) { | |
| 49 _column = column; | |
| 50 _row = row; | |
| 51 } | |
| 52 | |
| 53 int TextDisplay::_getc() { | |
| 54 return -1; | |
| 55 } | |
| 56 | |
| 57 void TextDisplay::foreground(uint16_t colour) { | |
| 58 _foreground = colour; | |
| 59 } | |
| 60 | |
| 61 void TextDisplay::background(uint16_t colour) { | |
| 62 _background = colour; | |
| 63 } | |
| 64 | |
| 65 bool TextDisplay::claim (FILE *stream) { | |
| 66 if ( _path == NULL) { | |
| 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); | |
| 68 return false; | |
| 69 } | |
| 70 if (freopen(_path, "w", stream) == NULL) { | |
| 71 // Failed, should not happen | |
| 72 return false; | |
| 73 } | |
| 74 // make sure we use line buffering | |
| 75 setvbuf(stdout, NULL, _IOLBF, columns()); | |
| 76 return true; | |
| 77 } |
