Lucas Borges / Mbed 2 deprecated MenuLCD_Copy

this locks like shit

Dependencies:   MenuLCD mbed

Fork of MenuLCD_copy by Vinícius Alves

menbed/menbedDisplayer.cpp@0:92357d1220f3, 2017-05-19 (annotated)

Committer:
ViniR
Date:
Fri May 19 13:07:52 2017 +0000
Revision:
0:92357d1220f3
Ent?o PARA...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ViniR 0:92357d1220f3 1 #include "mbed.h"
ViniR 0:92357d1220f3 2 #include "include/menbedMenuMessage.h"
ViniR 0:92357d1220f3 3 #include "include/menbedDisplayer.h"
ViniR 0:92357d1220f3 4
ViniR 0:92357d1220f3 5 MenbedDisplayer::MenbedDisplayer (MenbedDisplay *display) :
ViniR 0:92357d1220f3 6 display(display)
ViniR 0:92357d1220f3 7 {
ViniR 0:92357d1220f3 8 }
ViniR 0:92357d1220f3 9
ViniR 0:92357d1220f3 10
ViniR 0:92357d1220f3 11 void MenbedDisplayer::update (MenbedMenuMessage *menuMessage)
ViniR 0:92357d1220f3 12 {
ViniR 0:92357d1220f3 13 char *text = new char[display->getLineLength()+1];
ViniR 0:92357d1220f3 14
ViniR 0:92357d1220f3 15 for (int i=0; i<display->getLines(); i++)
ViniR 0:92357d1220f3 16 {
ViniR 0:92357d1220f3 17 extractLine (menuMessage->text, i, text);
ViniR 0:92357d1220f3 18 display->writeLine (text, i);
ViniR 0:92357d1220f3 19 }
ViniR 0:92357d1220f3 20
ViniR 0:92357d1220f3 21 // Print the up and down arrows if requested
ViniR 0:92357d1220f3 22 display->showUpArrow (menuMessage->showUpArrow);
ViniR 0:92357d1220f3 23 display->showDownArrow (menuMessage->showDownArrow);
ViniR 0:92357d1220f3 24
ViniR 0:92357d1220f3 25 delete[] text;
ViniR 0:92357d1220f3 26 }
ViniR 0:92357d1220f3 27
ViniR 0:92357d1220f3 28
ViniR 0:92357d1220f3 29 void MenbedDisplayer::extractLine (char *catenatedText, uint8_t lineNum,
ViniR 0:92357d1220f3 30 char *extractedText)
ViniR 0:92357d1220f3 31 {
ViniR 0:92357d1220f3 32 char *subText, *endText;
ViniR 0:92357d1220f3 33 size_t bytesToCopy;
ViniR 0:92357d1220f3 34
ViniR 0:92357d1220f3 35 extractedText[0] = '\0';
ViniR 0:92357d1220f3 36
ViniR 0:92357d1220f3 37 // Return with just a blank line if the line number to be extracted exceeds
ViniR 0:92357d1220f3 38 // the number of lines in the menu
ViniR 0:92357d1220f3 39 if (lineNum > display->getLines() - 1)
ViniR 0:92357d1220f3 40 return;
ViniR 0:92357d1220f3 41
ViniR 0:92357d1220f3 42 // We loop through the catenatedString finding each \n. These \n
ViniR 0:92357d1220f3 43 // characters separate the substrings that we are trying to extract.
ViniR 0:92357d1220f3 44 subText = catenatedText;
ViniR 0:92357d1220f3 45 while (lineNum > 0)
ViniR 0:92357d1220f3 46 {
ViniR 0:92357d1220f3 47 subText = strchr (subText, '\n');
ViniR 0:92357d1220f3 48
ViniR 0:92357d1220f3 49 // If the \n character was not found, the catenatedText string does not
ViniR 0:92357d1220f3 50 // contain enough \n-separated substrings.
ViniR 0:92357d1220f3 51 if (subText == (char *)NULL)
ViniR 0:92357d1220f3 52 {
ViniR 0:92357d1220f3 53 extractedText[0] = '\0';
ViniR 0:92357d1220f3 54 return;
ViniR 0:92357d1220f3 55 }
ViniR 0:92357d1220f3 56
ViniR 0:92357d1220f3 57 // Increment the subText pointer because the strchr() command returned
ViniR 0:92357d1220f3 58 // a pointer to the \n character found, but next time through the loop
ViniR 0:92357d1220f3 59 // we want to find the next \n, not the same \n again.
ViniR 0:92357d1220f3 60 subText++;
ViniR 0:92357d1220f3 61 lineNum--;
ViniR 0:92357d1220f3 62 }
ViniR 0:92357d1220f3 63
ViniR 0:92357d1220f3 64 // If there are strings following the one we are trying to extract, we
ViniR 0:92357d1220f3 65 // change the \n terminating the string to be extracted into a \0 so that
ViniR 0:92357d1220f3 66 // we can use the strlen function to determine the length of the string
ViniR 0:92357d1220f3 67 // we are trying to extract. If there are no additional \n-separated
ViniR 0:92357d1220f3 68 // strings following the one we are attempting to extract, strlen should
ViniR 0:92357d1220f3 69 // work on subText without modification.
ViniR 0:92357d1220f3 70 if ((endText = strchr (subText, '\n')) != (char *)NULL)
ViniR 0:92357d1220f3 71 bytesToCopy = endText - subText + 1;
ViniR 0:92357d1220f3 72 else
ViniR 0:92357d1220f3 73 bytesToCopy = strlen(subText);
ViniR 0:92357d1220f3 74
ViniR 0:92357d1220f3 75 // Copy the string found in the \n-separated substring number specified by
ViniR 0:92357d1220f3 76 // the lineNum parameter to the extracted string.
ViniR 0:92357d1220f3 77 strncpy (extractedText, subText, bytesToCopy);
ViniR 0:92357d1220f3 78
ViniR 0:92357d1220f3 79 // Replace the \n at the end of extractedText string with a \0
ViniR 0:92357d1220f3 80 extractedText[bytesToCopy-1] = '\0';
ViniR 0:92357d1220f3 81 }