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.