perl - 如何使用 Curses 从调整大小的窗口中获取窗口大小？

Question

我尝试了这种方法，但它不起作用 - getmaxyx 返回的值始终保持不变。

#!/usr/bin/env perl
use warnings;
use 5.012;
use Curses;

my $size_changed = 0;
$SIG{'WINCH'} = sub { $size_changed= 1; };

initscr(); 

my ( $row, $col );
getmaxyx( $row, $col );
addstr( "begin: $row - $col\n" );
refresh();

for ( 0 .. 19 ) {
    addstr( "-------------\n" );
    if ( $size_changed ) {
        getmaxyx( $row, $col );
        addstr( "new: $row - $col\n" );
        $size_changed = 0;
    }
    refresh();
    sleep 1;

}

sleep 3;
endwin();

Answer 1

#!/usr/bin/env perl
use warnings;
use 5.012;
use Curses;

my $size_changed = 0;
$SIG{'WINCH'} = sub { $size_changed= 1; };

initscr(); 

my ( $row, $col );
getmaxyx( $row, $col );
addstr( "begin: $row - $col\n" );
refresh();

for ( 0 .. 19 ) {
    sleep 2;
    if ( $size_changed ) {
        endwin();
        refresh(); 
        getmaxyx( $row, $col );
        addstr( "new: $row - $col\n" );
        $size_changed = 0;
    }
}

sleep 3;
endwin();

^^^ 这对我有用。根据Writing Programs with NCURSES / Using NCURSES under XTERM你应该执行“endwin() 后跟刷新()”