Method drawString

Code/Arduino_libraries/SSD1306/OLEDDisplay.cpp:620–653

uint16_t OLEDDisplay::drawString(int16_t xMove, int16_t yMove, const String &strUser) {
  uint16_t lineHeight = pgm_read_byte(fontData + HEIGHT_POS);

  // char* text must be freed!
  char* text = strdup(strUser.c_str());
  if (!text) {
    DEBUG_OLEDDISPLAY("[OLEDDISPLAY][drawString] Can't allocate char array.\n");
    return 0;
  }

  uint16_t yOffset = 0;
  // If the string should be centered vertically too
  // we need to now how heigh the string is.
  if (textAlignment == TEXT_ALIGN_CENTER_BOTH) {
    uint16_t lb = 0;
    // Find number of linebreaks in text
    for (uint16_t i=0;text[i] != 0; i++) {
      lb += (text[i] == 10);
    }
    // Calculate center
    yOffset = (lb * lineHeight) / 2;
  }

  uint16_t charDrawn = 0;
  uint16_t line = 0;
  char* textPart = strtok(text,"\n");
  while (textPart != NULL) {
    uint16_t length = strlen(textPart);
    charDrawn += drawStringInternal(xMove, yMove - yOffset + (line++) * lineHeight, textPart, length, getStringWidth(textPart, length, true), true);
    textPart = strtok(NULL, "\n");
  }
  free(text);
  return charDrawn;
}

void OLEDDisplay::drawStringf( int16_t x, int16_t y, char* buffer, String format, ... )
{