NCurses 中的鼠标移动事件 [英] Mouse movement events in NCurses

问题描述

我想知道NCurses中是否有鼠标移动事件之类的东西，是否有办法捕捉它们.遵循与鼠标交互(来自NCurses 编程 HOWTO) 似乎通过在调用中启用 REPORT_MOUSE_POSITION 位mousemask，确实可以捕捉鼠标移动事件.

I wonder if there is such a thing as mouse movement events in NCurses, and if there is a way to catch them. Following the Interfacing with the mouse (from the NCurses programming HOWTO) it seems that by enabling the REPORT_MOUSE_POSITION bit in the call to mousemask, one can indeed catch mouse movement events.

所以，我试过了，但它似乎不起作用.我有这样的事情:

So, I tried that and it does not seem to work. I have something like this:

int ch, count=0;
mmask_t old;

initscr ();
noecho ();
cbreak ();
mousemask (ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, &old);
keypad (stdscr, TRUE);

while ((ch = getchar ()) != 'q')
{
  count++;
  if (ch == KEY_MOUSE)
  {
     MEVENT event;
     assert (getmouse (&event) == OK);
     mvprintw (0, 0, "Mouse Event!
");
  }
  mvprintw (1, 1, "Event number %4d",count);
}

...

我预计当我移动鼠标光标时，我会看到事件计数器增加.但它没有.我还尝试在鼠标按钮 1 按下时移动它以查看是否生成拖动"事件，但它也没有执行任何操作.问题是，这是否只是我的终端模拟器的问题?或者我可能误解了 NCurses 认为的鼠标移动事件?接收到所有其他鼠标事件(并且我可以在使用鼠标的控制台中操作程序).

I expected that as I'll move my mouse cursor, I'll see the event counter increasing. But it didn't. I also tried moving it while mouse button 1 is down to see if generates "drag" events, and it also didn't do anything. The question is, if it's simply a problem of my terminal emulator? Or maybe I'm misunderstanding what NCurses considers as mouse movement events? All the other mouse events were received (and I can operate programs in the console that use the mouse).

我尝试了 gnome-terminal、xterm 和其他一些东西.我还通过转到我的 linux 机器(Fedora 15，Ctrl+Alt+F2)的 tty 尝试了一个文本环境(没有 X)，但没有奏效.

I tried gnome-terminal, xterm, and some other stuff. I also tried a textual environment (without X) by going to the tty's of my linux machine (Fedora 15, Ctrl+Alt+F2) and that did not work.

最后，假设我做对了并且应该报告这些事件，鼠标移动事件的 MEVENT 的 bstate 字段是什么?

Finally, assuming I do get this right and those events should be reported, what is the bstate field of a MEVENT for a mouse movement evenet?

非常感谢！

推荐答案

您需要:

1. 支持鼠标事件报告的终端；
2. $TERM 指向 terminfo 条目，该条目具有适当的 XM 条目以正确初始化终端.

1. a terminal which supports mouse event reporting;
2. $TERM pointing to a terminfo entry which has an appropriate XM entry to initialise the terminal correctly.

xterm 至少满足(1)；对于 (2)，您可能需要为 TERM 设置不同的值.

xterm at least satisfies (1); for (2), it's likely that you'll need to set a different value for TERM.

试试:

• TERM=xterm-1002 在按住按钮的同时光标移动到不同的单元格时获取位置事件；或
• TERM=xterm-1003 每当光标移动到不同的单元格时，即使没有按下任何按钮，也始终获取位置事件.

• TERM=xterm-1002 to get a position event when the cursor moves to a different cell while a button is being held down; or
• TERM=xterm-1003 to always get a position event whenever the cursor moves to a different cell, even if no button is pressed.

结果事件在 bstate 字段上设置了 REPORT_MOUSE_POSITION 位.

The resulting events have the REPORT_MOUSE_POSITION bit set on the bstate field.

(curs_mouse(3x)<的便携性"部分/code> 手册页描述了终端初始化，以及 Xterm Control Sequences 文档描述了相关的私有模式"扩展.)

(The "PORTABILITY" section of the curs_mouse(3x) man page describes the terminal initialisation, and the "Mouse Tracking" section of the Xterm Control Sequences documentation describes the relevant "private mode" extensions.)

你上面给出的代码需要使用getch()，而不是getchar()；并且在循环内需要一个 refresh() ！除此之外，当使用适当的 TERM 设置之一时，它适用于 xterm.

The code that you've given above needs to use getch(), not getchar(); and needs a refresh() inside the loop! Other than that, it works for me with xterm when using one of the appropriate TERM settings.

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