8.9 Clear Window and Lines

• int erase()  
  int werase(win)  
  werase(...) and erase() will copy blanks to every position on the window win or . For instance, when you set color attributes to a window and call werase() the window would be colored. I had some problems with COLOR_PAIRS when I defined other attributes then black on white so I wrote my own erase function (this is a low level access to the WINDOW structure):

  The problem is, that ncurses sometimes makes no use of the window attributes when blanking the screen. For instance, in _clrtoeol.c, is BLANK defined as

  so that the other window attributes get lost while the line is erased.

• int clear()  
  int wclear(win)  
  The same as erase(), but will also set clearok() (the screen will be cleared with the next refresh).
• int clrtobot()  
  int wclrtobot(win)  
  Clearing the current cursor line (start is one character right from the cursor) and the line below the cursor.
• int clrtoeol()  
  int wclrtoeol(win)  
  Clear the current line right from the cursor up to its end.