How can I set properties (e.g. backgroundcolor) of a Simulink Area programmatically?

Hi,

I've been trying to change the background color of a Simulink Area programmatically but without effect. I can use get/set to change the value of the property backgroundcolor, but this has no influence on the displayed color. On the other hand, if I change the color manually via the context menu, the value returned for backgroundcolor will change accordingly, so it does appear to be the correct property to look at.

Thanks! Ruben

[Torsten Knodt]

What exactly do you mean by "Simulink Area"? I have checked for a block and can modify the background color, e.g. with

set_param(gcb,'BackgroundColor','red')

Answer 1

[Monika Jaskolka]

The available properties for Simulink Areas are described here: https://www.mathworks.com/help/simulink/slref/simulink.annotation.html

To change the background color property of a Simulink Area that is currently selected, do the following:

handle = find_system(gcs, 'FindAll', 'on', 'type', 'annotation', 'AnnotationType', 'area_annotation', 'selected', 'on')
set_param(handle, 'BackgroundColor', 'green')

This works for me on 2017b.

[Ruben B.]

Thanks for the answer. I'm using 2015b. When I follow your steps, the appearance of the area does not change. So even though the property has obviously changed, it is not reflected in the rendering of the area element.

I retried in 2017b and there it works as expected. It seems to be a limitation/bug of 2015b then. Unfortunately we are bound to 2015b by our development process.