MATLAB Answers

How to get back red waitbar?

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Thomas
Thomas on 12 Nov 2014
Commented: Dev-iL on 8 Jul 2015
In 2014b the waitbar appearance changed from the cool red to an ugly green windows-style one (btw in help documentation it still says "A wait bar is a figure that displays what percentage of a calculation is complete as the calculation proceeds by progressively filling a bar with red from left to right." ).
How can i revert it back to red?

Accepted Answer

Robert Cumming
Robert Cumming on 12 Nov 2014
I played around with the java this afternoon and got this to work:
hBar = waitbar ( 0, 'Please Wait....' );
% now use java to get to the progress bar
jFrame = get ( hBar, 'JavaFrame' ); % this will throw a warning
jFigPanel = jFrame.getFigurePanelContainer;
jContainer = jFigPanel.getComponent(0);
jPanel = jContainer.getComponent(0);
%
jProgressContainer = jPanel.getComponent(0);
% get the progress bar
jProgressBar = jProgressContainer.getComponent(0);
% update the progressbar details
jProgressBar.setBackground ( java.awt.Color.RED );
jProgressBar.setString(''); % set the text to be empty
jProgressBar.setStringPainted(true);
% example of progress bar being updated:
for ii=0:0.02:1
waitbar(ii,hBar)
pause(0.1)
end
  3 Comments
Dev-iL
Dev-iL on 8 Jul 2015
Nice trick! FYI, the following line has no effect:
jProgressBar.setBackground ( java.awt.Color.RED );

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More Answers (1)

Michael Haderlein
Michael Haderlein on 12 Nov 2014
I'm working with 2014a, but if they didn't change the entire waitbar, you should be able to modify the color this way:
h = waitbar(0,'Please wait...');
hc=get(get(h,'children'),'children');
steps = 1000;
for step = 1:steps
pause(0.001)
waitbar(step / steps)
set(hc(2),'facecolor',rand(1,3))
end
close(h)
Warning: Don't run this code too often, it might cause headache ;-)
  1 Comment
Guillaume
Guillaume on 12 Nov 2014
Unfortunately, it doesn't appear to work in 2014b
the child of the waitbar (an axis) does not have any children (that are exposed)

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