作者 Heefan [actionscript] 2007-04-28 14:11 (点击下载)

 我想这样显示：
------------------------------------
| invoke funtion and show some     |       
| information here                 |                
|       --message 1                |                                 
|                                  |                                                  |                                   
|                                  | 
|                                  |
|                                  |  <--- SCREEN
|                                  |
|echo something here               |
|hello                             |
|Linuxsir   ----message2           |
|$                                 |
|-----------------------------------
问题描述
message1 和 message2不能共享一个屏幕阿
就是说，我调用 message1后，在调用message2，
那么屏幕上 message1中信息将不完全显示在一个屏幕了。
 
我修改 ABS上画盒子的代码，做菜单玩玩的： 
可以shell中运行一下。抓图中，上边还有显示一个 MENU 的盒子，但是显示不出来。。。
 
#!/bin/bash
# Draw-box.sh: Drawing a box using ASCII characters.
# Script by Stefano Palmeri, with minor editing by document author.
# Used in the "ABS Guide" with permission.
 
 
######################################################################
###  draw_box function doc  ###
 
#  The "draw_box" function lets the user
#+ draw a box into a terminal.       
#
#  Usage: draw_box ROW COLUMN HEIGHT WIDTH [COLOR] 
#
#  ROW and COLUMN represent the position        
#+ of the upper left angle of the box you're going to draw.
#  ROW and COLUMN must be greater than 0
#+ and less than current terminal dimension.
#  HEIGHT is the number of rows of the box, and must be > 0. 
#  HEIGHT + ROW must be <= than current terminal height. 
#  WIDTH is the number of columns of the box and must be > 0.
#  WIDTH + COLUMN must be <= than current terminal width.
#
# E.g.: If your terminal dimension is 20x80,
#  draw_box 2 3 10 45 is good
#  draw_box 2 3 19 45 has bad HEIGHT value (19+2 > 20)
#  draw_box 2 3 18 78 has bad WIDTH value (78+3 > 80)
#
#  COLOR is the color of the box frame.
#  This is the 5th argument and is optional.
#  0=black 1=red 2=green 3=tan 4=blue 5=purple 6=cyan 7=white.
#  If you pass the function bad arguments,
#+ it will just exit with code 65,
 #+ and no messages will be printed on stderr.
#
#  Clear the terminal before you start to draw a box.
#  The clear command is not contained within the function.
#  This allows the user to draw multiple boxes, even overlapping ones.
 
###  end of draw_box function doc  ### 
######################################################################
 
draw_box(){
 
#=============#
#drwa a box
 HORZ="-"
 VERT="|"
 CORNER_CHAR="+"
 
#test the number of arguments first
 MINARGS=4
 E_BADARGS=65
#=============#
 
 
if [ $# -lt "$MINARGS" ]; 
then                 # If args are less than 4, exit.
    exit $E_BADARGS
fi
 
# Looking for non digit chars in arguments.
# Probably it could be done better (exercise for the reader?).
# as for tr command, please read Unix and linux shell program Chap12
if echo $@ | tr -d [:blank:] | tr -d [:digit:] | grep . &> /dev/null;
then
  exit $E_BADARGS
fi
 
#how to draw
BOX_HEIGHT=`expr $3 - 1`   #  -1 correction needed because angle char "+" is 
BOX_WIDTH=`expr $4 - 1`    #+ a part of both box height and width.
T_ROWS=`tput lines`        #  Define current terminal dimension 
T_COLS=`tput cols`         #+ in rows and columns.
 
#---------------------Check each argument ----------------#
if [ $1 -lt 1 ] || [ $1 -gt $T_ROWS ]; 
then    #  Start checking if arguments are correct.
   exit $E_BADARGS
fi
 
if [ $2 -lt 1 ] || [ $2 -gt $T_COLS ]; then
exit $E_BADARGS
fi
 
if [ `expr $1 + $BOX_HEIGHT + 1` -gt $T_ROWS ]; 
then   # as for expr command, please read unix and shell program, chap17.5
   exit $E_BADARGS
fi
 
if [ `expr $2 + $BOX_WIDTH + 1` -gt $T_COLS ]; then
    exit $E_BADARGS
fi
 
if [ $3 -lt 1 ] || [ $4 -lt 1 ]; then
   exit $E_BADARGS
fi                                 # End checking arguments.
#-------------------End of checking each argument ----------------# 
 
#-------------plot_char() --------------------------------------#
plot_char()
{ # Function within a function.
    echo -e "\E[${1};${2}H"$3   #make the $1 and $2 in some color? yes
# try like this:
# $ echo -e '\E[34;47mThis prints in blue.'; tput sgr0
 }
 
echo -ne "\E[3${5}m"               # Set box frame color, if defined.
 
 
#----------------start drawing the box ---------------------#
 
count=1            #  Draw vertical lines using plot_char function.
 
#----the Height of box in row-----
for (( r=$1; count<=$BOX_HEIGHT; r++)); 
do
   plot_char $r $2 $VERT  #invoke plot_char
   let count=count+1
done 
 
#-------the Width of the box in row-----------------#
count=1
c=`expr $2 + $BOX_WIDTH`
 
for (( r=$1; count<=$BOX_HEIGHT; r++)); 
do
   plot_char $r $c $VERT
   let count=count+1
done 
 
#----------the width of the box in column ------#
count=1
for (( c=$2; count<=$BOX_WIDTH; c++)); 
do
   plot_char $1 $c $HORZ
   let count=count+1
 done 
 
# ----------------------------------It is difficult to fix this --My code-------------------Text --------------#
echo -e \+$text   # add the text here
 
#----------the height of the box in column ------#
count=1
r=`expr $1 + $BOX_HEIGHT`
for (( c=$2; count<=$BOX_WIDTH; c++)); do
  plot_char $r $c $HORZ
  let count=count+1
done 
 
 # ----------Draw box angles.-------------#
plot_char $1 $2 $CORNER_CHAR                  
plot_char $1 `expr $2 + $BOX_WIDTH` +
plot_char `expr $1 + $BOX_HEIGHT` $2 +
plot_char `expr $1 + $BOX_HEIGHT` `expr $2 + $BOX_WIDTH` +
 
# -----------Restore old colors.
echo -ne "\E[0m"
 
#----------- Put the prompt at bottom of the terminal.------------------------------------>
P_ROWS=`expr $T_ROWS - 1`
 
echo -e "\E[${P_ROWS};1H"
}
 
main_menu () {  # drawing the main menu
clear                       # Clear the terminal.
#------------- draw 4 boxes called Menu, Statistic,Tools,Help.
# Now I can set the content. Finally I did it! ------#
# I think I should use it as Main_menu funtion
 
i=0
R=1   #because i and R will be as loop variable.
while [ $i -lt 4 ]  #I will draw 4 boxes for Main Menu
do
	C=1      # Column
	H=3      # Height
	W=13     # Width 
	col=1    # Color (red)	
	case "$i" in
		0)text=Menu
		  draw_box $R $C $H $W $col ;;	
		1)text=1-Statistic
		  draw_box $R $C $H $W $col ;;  		
		2)text=2-Help
	     	  draw_box $R $C $H $W $col ;;
		3)text=3-Tools
	   	  draw_box $R $C $H $W $col ;;
	esac
		
	let i+=1
	let R+=3
done
 
}
 
main_menu
echo "Usage:h for getting information "
echo "      t for doing options "
echo "      s for makeing statistic"