带有bash脚本的复选框

我试图做一个非常简单的bash脚本,它模仿外观中复选框的行为！
我希望它显示一些选项,并根据按下左或右箭头键将光标移动到下一个复选框.我已经设法使用READ和Ansii转义序列来检测箭头键,并使用tput来移动光标.

我的问题在于我需要读取某个字母(例如x)才能按下然后再采取其他操作.但是,如何检测此按键,同时检测是否按下了箭头键？

要检测ansii代码,我需要读取3个字符和X字符(“select”键)我只需要读一个,如何读取3个字符,同时只读一个？

此外,我一直在尝试制作一些东西,以便用户只需按左或右箭头键或x键,但如果他按下任何其他键,则不会发生任何事情！

我到目前为止做到了这一点：

#!/bin/bash
## Here I just print in the screen the "form" with the "checkboxes"
function screen_info(){
clear
cat <<EOF

    /\_/\_/\_/\_/\_/\_/\_/\_/\_/\_
    ||
    ||      1[ ]    2[ ]    3[ ]
    ||
    #############################



EOF
}

## This function detects the arrow keys and moves the cursor
function arrows(){

## I use ANSII escape sequences to detect the arrow keys
left_arrow=$'\x1b\x5b\x44'  #leftuierda
right_arrow=$'\x1b\x5b\x43' #rightecha
just_x_key=""

## With tput I move the cursor accordingly
cursor_x=14
cursor_y=3
tput cup $cursor_y $cursor_x

while [ -z "$just_x_key" -o "$just_x_key" != "$just_x_key" ]; do
    read -s -n3 key
    while [ `expr length "$key"` -ne 3 ]; do
        key=""
        read -s -n3 key
        break
    done
    case "$key" in
    $left_arrow)
        if [ $cursor_x -gt 14 ]; then
            cursor_x=`expr $cursor_x - 8`
        fi
        tput cup $cursor_y $cursor_x
        #This is supposed to be a simple condition detecting the x key pressed wich I want to trigger something... But how to read a single character to this condition and 3 characters at the same time if the user presses the arrow key ???? =/
        #read -s just_x_key
        #if [ $just_x_key == x ]; then
        #   echo X
        #   tput cup 7 15
        #   echo "YOU PRESSED THE RIGHT KEY!!! =D"
        #fi 
        ;;
    $right_arrow)
        if [ $cursor_x -lt 28 ]; then
            cursor_x=`expr $cursor_x + 8`
        fi
        tput cup $cursor_y $cursor_x
        #read -s just_x_key
        #if [ $just_x_key == x ]; then
        #   echo X
        #   tput cup 7 15
        #   echo "YOU PRESSED THE RIGHT KEY!!! =D"
        #fi 
        ;;
    esac
done

exit $?
}


#EXECUTION
#=========

## I just call the functions!
screen_info
arrows

是的,我知道,这不是最完美的代码,但我正在努力学习.建议将非常感谢.

如果您只想要脚本中的复选框,可以使用whiptail(1)或dialog(1)工具创建复选框：

$whiptail --checklist "Please pick one" 10 60 5 one one off two two off\
  three three off four four off  five five off


                 ┌──────────────────────────────────────────────────────────┐
                 │    [ ] one    one                                        │ 
                 │    [*] two    two                                        │ 
                 │    [ ] three  three                                      │ 
                 │    [*] four   four                                       │ 
                 │    [ ] five   five                                       │ 
                 │                                                          │ 
                 │              <Ok>                  <Cancel>              │ 
                 │                                                          │ 
                 └──────────────────────────────────────────────────────────┘ 

"two" "four"$

最后的“两个”“四”是从whiptail(1)程序返回的选定条目.

如果你是为了自己的乐趣编程,请告诉我,我只是将其转换为评论,希望其他人能够在将来找到有用的提示.

带有bash脚本的复选框

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