MATLAB Answers

Clear text typed with input() from the command history

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Oleg Komarov
Oleg Komarov on 10 Jun 2014
Edited: Oleg Komarov on 25 Nov 2014
The case scenario is very simple, I am asking for a password to be typed in the command window.
I am using
s = input('Password: ','s')
I can clear the text from the command window with something like fprintf(char(8)), but how do I clear the last typed command from the command history ?
I am aware that inputdlg() would solve the problem but I would be interested in finding some way for editing the history.
EDIT
I personally changed approach from cmd window input to GUI input and wrote a submission for the purpose: http://uk.mathworks.com/matlabcentral/fileexchange/47210-passfield
  2 Comments
Oleg Komarov
Oleg Komarov on 10 Jun 2014
I cannot afford to terminate the session, it's either disruptive or discretionary.
I am exactly looking for a way to refresh the IDE and I suspect that by digging into the java of the command history pane, it should be possible to find the callback for deleting one row which you can do if you select and right-click.

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Accepted Answer

Oleg Komarov
Oleg Komarov on 13 Jun 2014
After digging into the Java internals with the help of Yair's toolkit (see findJObj, uiinspect and checkClass), I found a relatively simple way to manipulate entries in the Command History:
% Get instance to the Command History
cmdhist = com.mathworks.mde.cmdhist.AltHistory.getInstance;
% Retrieve the Command History Table
chtable = findjobj(cmdhist,'property',{'name', 'CommandHistoryTable'});
% Select last row row
nrows = chtable.getRowCount
chtable.setRowSelectionInterval(nrows, nrows)
% Delete selected rows
chtable.deleteSelectedCommands
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More Answers (1)

Cedric Wannaz
Cedric Wannaz on 10 Jun 2014
Edited: Cedric Wannaz on 10 Jun 2014
It may be a bit violent but
com.mathworks.mlservices.MLCommandHistoryServices.removeAll
would work.
And welcome back! ;-)
  1 Comment
Oleg Komarov
Oleg Komarov on 10 Jun 2014
Thanks Cedric! Yes, a bit violent. Can't afford to lose the whole history :).

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