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Python curses，将终端窗口分割成4个面板 - prefresh()返回ERR

pythoncursespython-curses
6

我正在运行一个 Python 的多进程系统，计划使用 curses 将终端窗口分成 4 个象限，并在其中一个象限中显示每个进程的输出。

所以最终的输出应该类似于：

--------------------------------
|               |               |
|   PROCESS01   |   PROCESS02   |
|               |               |
---------------------------------
|               |               |
|   PROCESS03   |   PROCESS04   |
|               |               |
---------------------------------

到目前为止，我尝试将窗口分成四个面板，如下所示：


def main():

    screen = curses.initscr()
    cols_tot = curses.COLS
    rows_tot = curses.LINES
    cols_mid = int(0.5*cols_tot)   ## middle point of the window
    rows_mid = int(0.5*rows_tot)

    pad11 = curses.newpad(rows_mid, cols_mid)
    pad12 = curses.newpad(rows_mid, cols_mid)
    pad21 = curses.newpad(rows_mid, cols_mid)
    pad22 = curses.newpad(rows_mid, cols_mid)
    pad11.addstr(0, 0, "*** PROCESS 01 ***")
    pad12.addstr(0, 0, "*** PROCESS 02 ***")
    pad21.addstr(0, 0, "*** PROCESS 03 ***")
    pad22.addstr(0, 0, "*** PROCESS 04 ***")
    pad11.refresh(0,0, 0,0, rows_mid,cols_mid)
    pad12.refresh(0,cols_mid, 0,cols_mid, rows_mid,cols_tot-1)
    pad21.refresh(rows_mid,0, rows_mid,0, cols_tot-1,rows_mid)
    pad22.refresh(rows_mid, cols_mid, rows_mid,cols_mid, rows_tot-1,cols_tot-1)


    curses.napms(3000)
    curses.endwin()


if __name__ == '__main__':
    main()

但我遇到了错误：

File "screen_show.py", line 78, in <module> main()
                                                                                                          File "screen_show.py", line 46, in main
                                                                                                                                                     pad12.refresh(0,cols_mid, 0,cols_mid, rows_mid,cols_tot-1)
_curses.error: prefresh() returned ERR
3
如果屏幕坐标（最后四个参数）超出物理屏幕的限制范围（参见 code），则 prefresh 函数将返回一个错误。请注意，此函数将在物理屏幕范围内对窗口进行刷新。 - Thomas Dickey
1个回答
3
这行代码应该修改为：
pad11.refresh(0,0, 0,0, rows_mid,cols_mid)
pad12.refresh(0,0, 0,cols_mid, rows_mid,cols_tot-1)
pad21.refresh(0,0, rows_mid,0, cols_tot-1,rows_mid)
pad22.refresh(0,0, rows_mid,cols_mid, rows_tot-1,cols_tot-1)

结果： 最终结果 完整可运行的代码
import curses


def draw_menu(stdscr):
    k = 0
    # Clear and refresh the screen for a blank canvas
    stdscr.clear()
    stdscr.refresh()
    while (k != ord('q')):
        # Initialization
        height, width = stdscr.getmaxyx()

        cols_tot = width
        rows_tot = height
        cols_mid = int(0.5*cols_tot)  # middle point of the window
        rows_mid = int(0.5*rows_tot)

        pad11 = curses.newpad(rows_mid, cols_mid)
        pad12 = curses.newpad(rows_mid, cols_mid)
        pad21 = curses.newpad(rows_mid, cols_mid)
        pad22 = curses.newpad(rows_mid, cols_mid)
        pad11.addstr(0, 0, "*** PROCESS 01 ***")
        pad12.addstr(0, 0, "*** PROCESS 02 ***")
        pad21.addstr(0, 0, "*** PROCESS 03 ***")
        pad22.addstr(0, 0, "*** PROCESS 04 ***")
        pad11.refresh(0, 0, 0, 0, rows_mid, cols_mid)
        pad12.refresh(0, 0, 0, cols_mid, rows_mid, cols_tot-1)
        pad21.refresh(0, 0, rows_mid, 0, cols_tot-1, rows_mid)
        pad22.refresh(0, 0, rows_mid, cols_mid, rows_tot-1, cols_tot-1)

        k = stdscr.getch()


def main():
    curses.wrapper(draw_menu)


if __name__ == "__main__":
    main()
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