如何检测来自QNX中ncurses的屏幕调整大小事件? [英] How to detect screen resize events coming from ncurses in QNX?

问题描述

我无法配置为使用ncurses QNX Momentics接收有关更改终端大小的事件. 我将Putyy用作终端，并且数据通过COM端口传输.

I can not configure to receive events about changing the size of the terminal using ncurses QNX Momentics. I am using Putyy as a terminal and data is transmitted through the COM port.

我的问题是在使用远程终端时如何实现屏幕切换事件的接收?

My question is how to realize the reception of screen change events when using a remote terminal?

FILE* fcons = fopen("/dev/ser1", "r+");
SCREEN* term = newterm("xterm-r5", fcons, fcons);
int y = 0, x = 0;
//if(y < 24 || x < 80)
//  resizeterm(24, 80);
flushinp();
main_scr = newwin(24, 80, 0, 0);
head_scr = subwin(main_scr, 3, 80, 0, 0);
prompt_scr = subwin(main_scr, 1, 9, 3, 2);
cursor_scr = newwin(1, 60, 3, 6);
output_scr = subwin(main_scr, 18, 76, 5, 2);
keypad(cursor_scr, TRUE);

int f = mousemask(ALL_MOUSE_EVENTS, NULL);

chtype temp_ch = 0;
while(KEY_RESIZE == temp_ch)
   temp_ch = wgetch(cursor_scr);
return 0;

推荐答案

像这样的普通串行端口连接不会发送SIGWINCH.在其他配置中，例如telnet，这是 NAWS 的结果(有关窗口大小的协商-我不是 resize 程序可以，例如，

A plain serial-port connection like that won't send a SIGWINCH. In other configurations, e.g., telnet, that's done as a result of NAWS (negotiations about window size--I dont't see a duplicate). Your application could poll for this by doing what the resize program does, plus a little more, e.g.,

• 保存光标位置
• 将光标移动到非常遥远的右下角
• 询问终端光标到底在哪里
• 等待响应，以获取实际的屏幕尺寸
• 使用系统调用设置终端的屏幕尺寸
• 恢复光标位置
• 向自己发送SIGWINCH

• save the cursor-position
• move the cursor to a very-far-off lower-right corner
• ask the terminal where the cursor really is
• wait for the response, to get the actual screensize
• set the terminal's screensize using a system call
• restore the cursor position
• send a SIGWINCH to yourself

与resize不同，这将在程序内部完成，因此必须保存/恢复光标位置(以避免混淆ncurses).请记住，ncurses已将终端设置为原始模式，因此不需要部分初始化.

Unlike resize, that would be done inside your program, so it would have to save/restore the cursor position (to avoid confusing ncurses). Keep in mind that ncurses has set the terminal to raw mode, so that part of the initialization would not be needed.

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