Allow background colour (mcolor) for labels

[scopa90]

It might be good to allow the background colour of a label to be set via mcolor and inherit the parent object's mcolor if it's not supplied.

[kisvegabor]

Hi,
it is a good idea, thank you!
Do you mean if the label's style is NULL (inherited from parent) use transparent background and use mcolor as background color if label's style is explicitly set? Maybe the empty style attribute can disable this feature.

[scopa90]

Or just keep it as transparent unless it's explcitly set?

[kisvegabor]

Currently there is no tracking for a unique style attribute (like mcolor) whether it is set or not. Only I can see the entire style is inherited or not.

[kisvegabor]

If we think it further the label can use all backround related style attributes like mcolor, gcolor, bcolor, bopa etc. but only if its style is set explicitly. Else only use the inherited font, ccolor, letter space etc

What do you think?

[kisvegabor]

I added the update to beta. Now if a label's style is set by lv_obj_set_style() to not NULL then background will be drawn.
To avoid drawing background set empty=1 and bwidth=0 properties or copy LV_STYLE_TRANSP when initializing a new label style.

Tests are still needed to see how it effect existing objects where labels are used.

[scopa90]

Just had chance to test this but only for a straight label. Looks very good.

[kisvegabor]

Thanks for testing!