窗口/面板似乎总是 3 个字符宽度答案

【问题标题】：window/panel always seems to be 3 chars width窗口/面板似乎总是 3 个字符宽度
【发布时间】：2022-11-02 16:09:22
【问题描述】：

我正在尝试使用带有移动窗口的 c++ 创建一个 ncursesw 程序。但我的窗口似乎总是 3 个字符。即使使用 getmaxyx 我得到正确大小的窗口，我也不知道我做错了什么。

这是我的代码：

#ifndef MAIN_CPP
#define MAIN_CPP

#include <iostream>
#include <ncursesw/ncurses.h>
#include <panel.h>

using namespace std;

void quit();

int main(int argc, char* argv[]) {
  // Init Curses ----------
  setlocale(LC_ALL, "");
  WINDOW* win = initscr();
  atexit(quit);
  curs_set(0);
  start_color();
  clear();
  noecho();
  cbreak();
  keypad(stdscr, true);

  // Create window / panel
  WINDOW* win2 = newwin(9, 18, 0, 0);
  PANEL* pan2 = new_panel(win2);

  waddstr(win, "ABCDEFGHIJKLMNOPQRSTUVWXYZ");

  waddstr(win2, "abcdefghijklmnopqrstuvwxyz");

  box(win2, 0, 0);

  update_panels();
  doupdate();

  getch();

  return 0;
}

void quit() {
  endwin();
}

#endif

我编译使用：

g++ -o wintest main.cpp -lncursesw -lpanel

我的输出总是这样：

窗口和面板仅占用 3 的宽度 waddstr 清楚地写入 18 个字符并在 18 个字符之后中断为另一个，并且该框也尝试输出正确的大小，但只有前 3 列可见。（这由在 stdwin（var name win）上可见的大写字符的输出和从第二行的字母 s（框后面）开始的小写字符表示，这是输出中的 19 个字符。）

【问题讨论】：

标签： c++ terminal ncurses

【解决方案1】：

那是从一个窗口/刷新覆盖另一个。这是一个调试跟踪（省略了keypad 的一些细节，以保持简短）：

TRACING NCURSES version 6.3.20221029 (tracelevel=0x24)
- TRACE_UPDATE (4)
- TRACE_CALLS (32)
called {initscr()
_nc_alloc_screen_sp screen1
your terminal name is screen.xterm-new
using 2048 for getstr limit
duplicate /usr/local/ncurses/share/terminfo
duplicate /usr/share/terminfo
duplicate /usr/local/ncurses/share/terminfo
not found /users/tom/.terminfo
_nc_next_db 1 /usr/local/ncurses/share/terminfo
_nc_setup_tinfo returns 1
screen size: terminfo lines = 24 columns = 80
SYS screen size: environment LINES = 40 COLUMNS = 80
screen size: environment LINES = 24
screen size is 24x80
TABSIZE = 8
created SP screen1
screen size: terminfo lines = 24 columns = 80
SYS screen size: environment LINES = 40 COLUMNS = 80
screen size: environment LINES = 24
screen size is 24x80
TABSIZE = 8
create :screen screen.xterm-new 24x80
initializing ACS map
READ acs_chars "``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~"
DIFF acs_chars "+>,<-^.v0#A+B+C+D+E+F+G+H+I+J+K+L+M+N+Q-R-T+U+V+W+X|Y|``aaffggh#iijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~"
2 REPEATS OF _nc_unicode_locale(UTF-8) ->1
initializing WIDE-ACS map (Unicode is active)
_nc_get_locale "en_US.UTF-8"
legacy-coding 0
creating newscr
create :window newscr
creating curscr
create :window curscr
creating stdscr
create :window stdscr
_nc_tiparm: format is null
CatchIfDefault - will catch SIGINT
CatchIfDefault - will catch SIGTERM
CatchIfDefault - will catch SIGWINCH
return }stdscr
called {curs_set(screen1,0)
return }1
called {start_color(screen1)
started color: COLORS = 8, COLOR_PAIRS = 64
return }0
called {clear()
return }0
called {noecho(screen1)
return }0
called {cbreak(screen1)
return }0
called {keypad(stdscr,1)
return }0
called {newwin(screen1, 9,18,0,0)
create :window window0
return }window0
called {new_panel(window0)
create :root_panel panel0
create :user_ptr user_ptr0
create :new_panel panel1
create :user_ptr user_ptr1
--> show_panel "user_ptr1"
<lt1> b="user_ptr0" t="user_ptr0"
pan id="user_ptr1"
stk id="user_ptr0" b=-- a=-- y=0 x=0
<lt9> b="user_ptr0" t="user_ptr1"
pan id="user_ptr1"
stk id="user_ptr0" b=-- a="user_ptr1" y=0 x=0
stk id="user_ptr1" b="user_ptr0" a=-- y=0 x=0
return }panel1
RUN of waddnstr()s: stdscr, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
RUN of waddnstr()s: window0, "abcdefghijklmnopqrstuvwxyz"
called {box(window0,{000},{000})
using {ACS_VLINE}, {ACS_VLINE}, {ACS_HLINE}, {ACS_HLINE}, {ACS_ULCORNER}, {ACS_URCORNER}, {ACS_LLCORNER}, {ACS_LRCORNER}
return }0
called {update_panels(screen1)
--> update_panels
wnoutrefresh id="user_ptr0" b=-- a="user_ptr1" y=0 x=0
...win[ 0]   0 79 ='ABCDEFGHIJKLMNOPQRSTUVWXYZ '
...win[ 1]   0 79 ='                           '
...win[ 2]   0 79 ='                           '
...win[ 3]   0 79 ='                           '
...win[ 4]   0 79 ='                           '
...win[ 5]   0 79 ='                           '
...win[ 6]   0 79 ='                           '
...win[ 7]   0 79 ='                           '
...win[ 8]   0 79 ='                           '
...win[ 9]   0 79 ='                           '
...win[10]   0 79 ='                           '
...win[11]   0 79 ='                           '
...win[12]   0 79 ='                           '
...win[13]   0 79 ='                           '
...win[14]   0 79 ='                           '
...win[15]   0 79 ='                           '
...win[16]   0 79 ='                           '
...win[17]   0 79 ='                           '
...win[18]   0 79 ='                           '
...win[19]   0 79 ='                           '
...win[20]   0 79 ='                           '
...win[21]   0 79 ='                           '
...win[22]   0 79 ='                           '
...win[23]   0 79 ='                           '
newscr[ 0]   0 79 ='ABCDEFGHIJKLMNOPQRSTUVWXYZ '
newscr[ 1]   0 79 ='                           '
newscr[ 2]   0 79 ='                           '
newscr[ 3]   0 79 ='                           '
newscr[ 4]   0 79 ='                           '
newscr[ 5]   0 79 ='                           '
newscr[ 6]   0 79 ='                           '
newscr[ 7]   0 79 ='                           '
newscr[ 8]   0 79 ='                           '
newscr[ 9]   0 79 ='                           '
newscr[10]   0 79 ='                           '
newscr[11]   0 79 ='                           '
newscr[12]   0 79 ='                           '
newscr[13]   0 79 ='                           '
newscr[14]   0 79 ='                           '
newscr[15]   0 79 ='                           '
newscr[16]   0 79 ='                           '
newscr[17]   0 79 ='                           '
newscr[18]   0 79 ='                           '
newscr[19]   0 79 ='                           '
newscr[20]   0 79 ='                           '
newscr[21]   0 79 ='                           '
newscr[22]   0 79 ='                           '
newscr[23]   0 79 ='                           '
wnoutrefresh id="user_ptr1" b="user_ptr0" a=-- y=0 x=0
...win[ 0]   0 17 ='lqqqqqqqqqqqqqqqqk'
attrs1[ 0]        ='444444444444444444'
...win[ 1]   0 17 ='xtuvwxyz         x'
attrs1[ 1]        ='4                4'
...win[ 2]   0 17 ='x                x'
attrs1[ 2]        ='4                4'
...win[ 3]   0 17 ='x                x'
attrs1[ 3]        ='4                4'
...win[ 4]   0 17 ='x                x'
attrs1[ 4]        ='4                4'
...win[ 5]   0 17 ='x                x'
attrs1[ 5]        ='4                4'
...win[ 6]   0 17 ='x                x'
attrs1[ 6]        ='4                4'
...win[ 7]   0 17 ='x                x'
attrs1[ 7]        ='4                4'
...win[ 8]   0 17 ='mqqqqqqqqqqqqqqqqj'
attrs1[ 8]        ='444444444444444444'
newscr[ 0]   0 79 ='lqqqqqqqqqqqqqqqqkSTUVWXYZ '
attrs1[ 0]        ='444444444444444444         '
newscr[ 1]   0 79 ='xtuvwxyz         x         '
attrs1[ 1]        ='4                4         '
newscr[ 2]   0 79 ='x                x         '
attrs1[ 2]        ='4                4         '
newscr[ 3]   0 79 ='x                x         '
attrs1[ 3]        ='4                4         '
newscr[ 4]   0 79 ='x                x         '
attrs1[ 4]        ='4                4         '
newscr[ 5]   0 79 ='x                x         '
attrs1[ 5]        ='4                4         '
newscr[ 6]   0 79 ='x                x         '
attrs1[ 6]        ='4                4         '
newscr[ 7]   0 79 ='x                x         '
attrs1[ 7]        ='4                4         '
newscr[ 8]   0 79 ='mqqqqqqqqqqqqqqqqj         '
attrs1[ 8]        ='444444444444444444         '
newscr[ 9]   0 79 ='                           '
newscr[10]   0 79 ='                           '
newscr[11]   0 79 ='                           '
newscr[12]   0 79 ='                           '
newscr[13]   0 79 ='                           '
newscr[14]   0 79 ='                           '
newscr[15]   0 79 ='                           '
newscr[16]   0 79 ='                           '
newscr[17]   0 79 ='                           '
newscr[18]   0 79 ='                           '
newscr[19]   0 79 ='                           '
newscr[20]   0 79 ='                           '
newscr[21]   0 79 ='                           '
newscr[22]   0 79 ='                           '
newscr[23]   0 79 ='                           '
return }
called {_nc_tinfo:doupdate(screen1)
curscr[ 0]   0 79 ='  '
curscr[ 1]   0 79 ='  '
curscr[ 2]   0 79 ='  '
curscr[ 3]   0 79 ='  '
curscr[ 4]   0 79 ='  '
curscr[ 5]   0 79 ='  '
curscr[ 6]   0 79 ='  '
curscr[ 7]   0 79 ='  '
curscr[ 8]   0 79 ='  '
curscr[ 9]   0 79 ='  '
curscr[10]   0 79 ='  '
curscr[11]   0 79 ='  '
curscr[12]   0 79 ='  '
curscr[13]   0 79 ='  '
curscr[14]   0 79 ='  '
curscr[15]   0 79 ='  '
curscr[16]   0 79 ='  '
curscr[17]   0 79 ='  '
curscr[18]   0 79 ='  '
curscr[19]   0 79 ='  '
curscr[20]   0 79 ='  '
curscr[21]   0 79 ='  '
curscr[22]   0 79 ='  '
curscr[23]   0 79 ='  '
newscr[ 0]   0 79 ='lqqqqqqqqqqqqqqqqkSTUVWXYZ '
attrs1[ 0]        ='444444444444444444         '
newscr[ 1]   0 79 ='xtuvwxyz         x         '
attrs1[ 1]        ='4                4         '
newscr[ 2]   0 79 ='x                x         '
attrs1[ 2]        ='4                4         '
newscr[ 3]   0 79 ='x                x         '
attrs1[ 3]        ='4                4         '
newscr[ 4]   0 79 ='x                x         '
attrs1[ 4]        ='4                4         '
newscr[ 5]   0 79 ='x                x         '
attrs1[ 5]        ='4                4         '
newscr[ 6]   0 79 ='x                x         '
attrs1[ 6]        ='4                4         '
newscr[ 7]   0 79 ='x                x         '
attrs1[ 7]        ='4                4         '
newscr[ 8]   0 79 ='mqqqqqqqqqqqqqqqqj         '
attrs1[ 8]        ='444444444444444444         '
newscr[ 9]   0 79 ='                           '
newscr[10]   0 79 ='                           '
newscr[11]   0 79 ='                           '
newscr[12]   0 79 ='                           '
newscr[13]   0 79 ='                           '
newscr[14]   0 79 ='                           '
newscr[15]   0 79 ='                           '
newscr[16]   0 79 ='                           '
newscr[17]   0 79 ='                           '
newscr[18]   0 79 ='                           '
newscr[19]   0 79 ='                           '
newscr[20]   0 79 ='                           '
newscr[21]   0 79 ='                           '
newscr[22]   0 79 ='                           '
newscr[23]   0 79 ='                           '
ClearScreen() called
screen cleared
updating screen from scratch
return }0
called {wgetch(stdscr)
wgetch returning : 012
return }10
called {endwin(screen1)
return }0

这些中的每一个都会显式地或作为副作用进行刷新：

  update_panels();
  doupdate();

  getch();

【讨论】：