Opposite of drawnow - prevent changes to a listbox
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Matthew Murphy
il 8 Feb 2017
Commentato: Matthew Murphy
il 14 Feb 2017
I am using GUIDE to create plots of experimental data. In my figure, I have menus in which I store the input data categories and output categories of functions that I run on that data.
As I operate on those plots, the need arises to change the contents of those menus, operate on the data, then change the menus back to a presentable format.
In essence, I am trying to prevent those menus from being visibly updated, while still changing the contents so I can use them to do what I need to do. Since drawnow forces a graphical update, I was wondering if there was an opposite equivalent of that call.
Any comments and suggestions are welcome.
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Walter Roberson
il 10 Feb 2017
About the only equivalent is to set the visibility of the items to be off. The items disappear from view, but any internal changes do not result in visible changes until the visibility is set back on again.
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Walter Roberson
il 13 Feb 2017
Even in R2010b, using set() should never trigger immediate graphics updates except perhaps setting figures visible -- with the exception that if you are at the command line (especially the debugger) then the graphics is updated before the prompt is given.
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Bill York
il 10 Feb 2017
It sounds like you want to update the graphics without updating the menus. There is no way in MATLAB to do this.
Could you tell me more about how you are using the menus? There may be another way to achieve your goal that does not collide with updating the graphics.
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Walter Roberson
il 14 Feb 2017
GUIDE uses guidata() relative to the object whose callback is being invoked, which refers back to the figure enclosing that object. That has some advantages, but if you are working in the mode of having a "main" GUI figure and other figures that are under the control of the main figure, then it is more common than not to want the controls in the secondary figures to be able to refer to data in the main figure.
I do not know if there are good solutions to the complex interactions. Perhaps if you could somehow designate a particular data pool to be used by the figure and if the data pool could be shared between multiple figures.
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