Default properties don't affect graphics, that are created with an empty parent

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Roman Müller-Hainbach
评论： Roman Müller-Hainbach 2021-4-23
I regularly use graphics that are intentionally created unparented. Since I want my apps to work on all platforms, I have the need to adapt font sizes. I tried to make use the default properties functionality to non-invasively make font sizes in my apps adapt to the platform the app is running on.
Unfortunately I encounter this unpleasant behavior, where the default property values seem to have no effect on graphics, if they are created with an empty parent.
set(groot, 'DefaultUicontrolFontSize', 14)
c = uicontrol('Parent',gcf);
c.FontSize % returns 14
c = uicontrol('Parent',[]);
c.FontSize % returns 10
Maybe there is a way for this to be the intended behavior, but I struggle to see it.
If this is a bug, I hope there can be an update to fix it before the next release. If not, I hope someone has an idea for a workaround.

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采纳的回答

Monisha Nalluru
Monisha Nalluru 2021-4-23
From the documentation, it is said the object get their default properties from their ansectors.
If the object has no ancestor, it wont pick the default properties mentioned.
You can query the default properties for object without parenting.
get(groot, 'defaultUIControlFontSize') % return 8
will give the default font size which could then pass to their uicontrol instance as the "FontSize" property
  1 个评论
Roman Müller-Hainbach
Roman Müller-Hainbach 2021-4-23
Yes. My understanding was that even unparented controls were descendents of groot. Apparently this is not true.
It would have been more useful in my opinion to apply groot default settings not only to figure objects but also all unparented graphics aswell.

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