helpBar.py

   1 import curses
   2
   3 class helpBar:
   4     # commands is in the form (key, command_name)
   5     commands = []
   6     mx=my=0
   7     x=y=0
   8     colWidth = 25
   9     numCols=1
  10
  11     def __init__(self, window):
  12         self.w = window
  13
  14     def updateGeometry(self):
  15         (self.my, self.mx) = self.w.getmaxyx()
  16         (self.y, self.x) = self.w.getbegyx()
  17         self.numCols = self.mx/self.colWidth
  18         numRows = len(self.commands)/self.numCols +1
  19         self.y += self.my - numRows
  20         self.my = numRows
  21         self.w.mvwin(0,0)
  22         self.w.resize(self.my,self.mx)
  23         self.w.mvwin(self.y,self.x)
  24
  25     def refresh(self):
  26         self.clear()
  27         self.updateGeometry()
  28         r=0
  29         c=0
  30         for key,command in self.commands:
  31             self.w.addnstr(r,c,key+" "+command+" "*self.colWidth,self.colWidth-1)
  32             self.w.chgat(r,c,2,curses.A_REVERSE)
  33             c+=self.colWidth
  34             if c > self.colWidth*self.numCols:
  35                 c=0
  36                 r+=1
  37         self.w.refresh()
  38
  39     def clear(self):
  40         self.w.erase()
  41         self.w.refresh()
  42
  43     def getSearch(self):
  44         self.clear()
  45         self.w.addstr(0,0,"/")
  46         string = ""
  47         done = False
  48         self.w.keypad(1)
  49         ch = self.w.getch()
  50         while (not done):
  51             if ch == curses.KEY_ENTER or ch == 10:
  52                 return string
  53             elif ch == 27: # escape
  54                 return ""
  55             elif ch == curses.KEY_BACKSPACE and string !="":
  56                 self.w.addstr(0,1," "*len(string))
  57                 string = string[0:len(string)-1]
  58                 self.w.addstr(0,1,string)
  59             elif ch>=32 and ch<=126:
  60                 char = curses.keyname(ch)
  61                 string = string + char
  62                 self.w.addstr(0,1,string)
  63             self.w.refresh()
  64             ch = self.w.getch()
  65
  66     def display(self,string):
  67         self.clear()
  68         self.w.addstr(0,1,string)
  69         self.w.refresh()