Color Blindness. Color blindness, or color vision deficiency, is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions.There is no actual blindness.olor Blindness. Color blindness, or color vision deficiency, is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions. There is no actual blindness.
QString converts the const char * data into Unicode using the fromUtf8 () function. In all of the QString functions that take const char * parameters, the const char * is interpreted as a classic C-style '\0'-terminated string encoded in UTF-8. It is legal for the const char * parameter to be 0.static] QString QString:: fromUcs4 (const uint * unicode, int size = -1). Returns a QString initialized with the first size characters of the Unicode string unicode (ISO-10646-UCS-4 encoded). If size is -1 (default), unicode must be terminated with a 0. This function was introduced in Qt 4.2.
pos. Position of the first character to be copied as a substring. If this is equal to the string length, the function returns an empty string. If this is greater than the string length, it throws out_of_range.Note: The first character is denoted by a value of. (not. ). len. Number of characters to include in the substring (if the string is shorter, as many characters as possible are used).A value of string::npos indicates all characters until the end of the string. A string object with a substring of this object.f this is greater than the string length, it throws out_of_range. Note: The first character is denoted by a value of. (not. ). len. Number of characters to include in the substring (if the string is shorter, as many characters as possible are used).