Styles on objects in micropython

Micropython
1

Trying to set background color on a label object.
Obviously don’t understand how it works.

mystyle = lv.style_t(lv.style_plain)
mystyle.body.main_color = lv.color_hex(0x000000) # background top color (main), 0xRRGGBB
mystyle.body.grad_color = lv.color_hex(0x880000) # background bottom color (gradient), 0xRRGGBB
mystyle.text.color = lv.color_hex(0xffffff) # text-colour, 0xRRGGBB

This works: (seeting the style for the scr

scr.set_style(mystyle)

but setting a style just for one label does not.

label = lv.label(btn)
label.set_text(“Button”)
label.set_style(mystyle)

I get an error: TypeError: argument num/types mismatch

2

Hi @Glenn_Meader!

According to the docs, lv_label_set_style receives 3 parameters, the label, style type (should be LV_LABEL_STYLE_MAIN) and a pointer to the style itself.

The docs were written for the C API, but the same applies to Micropython.
In case of Micropython the first parameter is “self” for object methods, and the function expects the other two parameters.

So it should be something like:

label.set_style(lv.label.STYLE.MAIN, mystyle)
3

Here’s how I got it to work:
You have to enable “draw” to change the background of a label with lbl.set_body_draw(lbl)

 scr = lv.obj()
 lbl = lv.label(scr)
 lbl.set_text(" Label Text ")
 lbl.set_body_draw(lbl)
 mystyle = lv.style_t(lv.style_plain)
 mystyle.body.main_color = lv.color_hex(0x000000) # background top color (main), 0xRRGGBB
 mystyle.body.grad_color = lv.color_hex(0x880000) # background bottom color (gradient), 0xRRGGBB
 mystyle.text.color = lv.color_hex(0xffff00) # text-colour, 0xRRGGBB
 lbl.set_style(lv.label.STYLE.MAIN, mystyle)
 lv.scr_load(scr)
1 Like
4

That’s correct, according to the documentation.