Pmw.py 文件源码

def xview(self, mode = None, value = None, units = None):

        if type(value) == types.StringType:
            value = string.atof(value)
        if mode is None:
            return self._horizScrollbar.get()
        elif mode == 'moveto':
            frameWidth = self._frame.winfo_reqwidth()
            self.startX = value * float(frameWidth)
        else: # mode == 'scroll'
            clipperWidth = self._clipper.winfo_width()
            if units == 'units':
                jump = int(clipperWidth * self['horizfraction'])
            else:
                jump = clipperWidth
            self.startX = self.startX + value * jump

        self.reposition()

    # Called when the user clicks in the vertical scrollbar. 
    # Calculates new position of frame then calls reposition() to
    # update the frame and the scrollbar.