input.py 文件源码

def on_key(self, ch):
        x = self.pos

        # ascii 32-126 (inclusive)
        if curses.ascii.isprint(ch):
            if len(self.value) < self.max_length:
                self.value = self.value[:x] + chr(ch) + self.value[x:]
                self.pos += 1

        elif ch == curses.KEY_LEFT:
            if x > 0:
                self.pos -= 1

        elif ch == curses.KEY_RIGHT:
            if x < len(self.value):
                self.pos += 1

        elif ch == curses.KEY_BACKSPACE:
            if x > 0:
                self.value = self.value[:x - 1] + self.value[x:]
                self.pos -= 1

        elif ch == curses.KEY_DC:
            if x < len(self.value):
                self.value = self.value[:x] + self.value[x + 1:]

        elif ch == curses.KEY_HOME:
            self.pos = 0

        elif ch == curses.KEY_END:
            self.pos = len(self.value)

        else:
            return False

        self.update()
        return True