I wrote a little menu script that searches through another script you specify and displays step-names and next to it the text of the step. The scripts are converted JCL from mainframe. It alows you to select steps you want and will then create a new script which includes only the steps you selected. It looks something like
Code:
Step Selected Text
S0010 [ ] S0030 #Here we do some stuff
S0020 [ ] cp file to otherfile
S0030 [x] some more commands.....
S0040 [ ] .
S0050 [ ] .
.
## End of step 0030
I am using tput to position the cursor for each of the text lines and clear the lines one at a time. You can however notice the clearing/drawing, its a bit slow. I have loaded it into a table so no disk reading involved. When I display the text below the steps it is super fast, no visible delay, but then I dont have to position the cursor, just delete till end of terminal and echo the text.
Because of space, some scripts have a lot of steps plus it looks more impressive, I want to keep the layout as above.
I have been playing with flow control from the command line. i.e. If you type ^S, then type some commands nothing is echoed, then type ^Q it will echo everyting you typed etc.
I want to do the same from the script, I think I am just being thick cannot figure out how. How do I in the script emulate ^S and ^Q. I have been searching all day but most articles are about enabling/disabling flow control via IXON, not what I want.
I want to stop scrolling, do my erase of old lines and echo of new lines, then send to the screen by enabling scrolling again in the script.
Thanks!
---------- Post updated at 04:13 PM ---------- Previous update was at 04:10 PM ----------
My spaces have dissapeared, looks like below, underscore=space
Step_Selected_Text
S0010_[ ]_____S0030 #Here we do some stuff
S0020_[ ]_____cp file to otherfile
S0030_[x]_____some more commands.....
S0040_[ ]_____.
S0050_[ ]_____.
______________.
______________even more commands
______________## End of step 0030
Last edited by vbe; 02-09-2010 at 12:46 PM..
Reason: added code tags
---------- Post updated at 18:02 ---------- Previous update was at 17:58 ----------
To help you, I suppose we would need to see a bit of your script in order to understand some of the logic and figure out what could be possible solutions...
I guess what I want is to create some sort of screen buffer. Not sure if it can be achieved with flow control. I want to stop sending chars to the screen, draw the screen, then send all of the chars at once, instead of one line at a time.
Anyway here is a "Screenshot" of the script running
And here is the function that displays the step text.
Code:
function DisplayStep{stty -echo -raw # Stop keyboard input##Clear the previous one firstDISPLINE=2 # Init var, want to start on line 2while [ DISPLINE -lt $SCREENLINES ] # Clear out the currently displayed textdotput cup $DISPLINE 30 # Position the cursor## The echo of all the spaces seem to be a lot faster than the tput el to erase a line## tput elecho ' '(( DISPLINE++ )) # Add one to vardoneSCREENLINES=2 # Init var, want to start on line 2DISPLINE=2 # Init var, want to start on line 2## Set the field seperator to enterIFS=''for ONELINE in `echo "${STEPDETAIL[$ELEMENT]}"` # Loop through the text delimited by enter.dotput cup $DISPLINE 30 # Position the cursorecho "${ONELINE}" # Display the text(( DISPLINE++ )) # Increase the row to display the next line on(( SCREENLINES++ )) # Count of lines to clear next time the function is calledif [ $DISPLINE == $MAXLINES ] # Stop the script from scrolling off the bottom of the screen. Just display as much as it can.then breakfidoneunset IFS # Reset the IFSstty -echo raw # Accept keyboard input againtput cup $CPOSY $CPOSX # Put the cursor where it was}
At the top of the function I would like to stop display to the screen and then at the end enable it again and send all the echoe's at once.
It is probably not possible in a script. This is a Korn shell script.
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