cwrapper.py 文件源码

def mainloop(self):
        """
        Called after HUD has been set up. Handles rendering and user input.
        """
        # Disable cursor display by default
        curses.curs_set(0)

        # Display initial state
        self.render()

        while True:
            # Render before fetching input
            self.render()

            # note: call is non-blocking, per __init__ calling nodelay(True)
            c = self.screen.getch()

            if c == curses.KEY_RESIZE:
                # Terminal has been resized

                # must be called so that curses.LINES, curses.COLS will change
                curses.update_lines_cols()

                # in case old data won't be redrawn after resize
                self.screen.clear()

            if c == curses.KEY_UP:
                # Move up as far as the 0th record
                self.selectpos = max(self.selectpos - 1, 0)
                if self.selectpos < self.scrollpos:
                    # Handle scrolling if we were at the first record on screen
                    self.scrollpos -= 1

            if c == curses.KEY_DOWN:
                # Move down as far as the Nth record
                self.selectpos = min(self.selectpos + 1, len(self.records) - 1)
                if self.selectpos >= (self.scrollpos + curses.LINES - 2 - self.bottom_panel_height) :
                    # Handle scrolling if we were at the last record on screen
                    self.scrollpos += 1