command window refresh in R015b

Dear all,

For our numerical software, we've coupled a C++ library with MATLAB. Every few seconds, that library has some useful output, that we send to the command window (mexPrintf).

We've come to rely on calling drawnow('update') after every print to make sure that the output of the library streams live, line-by-line, into the command window, instead of being buffered (appearing in chunks of a good number of lines at a time).

Now, a user of our software reports that this mechanism stopped working between R2015a, and R2015b. I've checked the release notes but could not find a clue that would explain this.

Any hints for me?

Best regards, Joris Gillis

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/263682-command-window-not-dynamically-displaying-data-in-r2015b-waits-till-end-of-run-to-display-everythin

Answer 2

[Jan]

A workaround is calling an M-helper function: http://www.mathworks.com/matlabcentral/answers/255615#answer_215636

[Joris Gillis]

Hi Jan, in that answer you talk about 'java methods'. Does this mean you already explored the following unexposed-feature route?

desktop = com.mathworks.mde.desk.MLDesktop.getInstance;
cmdwin = desktop.getClient('Command Window');
xwin = cmdwin.getComponent(0).getViewport.getComponent(0);
xwin.repaint

Best, Joris

Disclaimer: I'm on R204b myself, so I can only trust the gurus on their word..

[adams13]

Thank you for a nice solution, it works also in 2023. Redraw only the command window is definitely better than all figures with 'drawnow'. However, Matlab R2023b says

'com.mathworks' package and subpackages will be removed in a future release. There is no simple replacement for this.

Any solution for a current version?