How to create a screen backstage

How-to
1

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Description

What MCU/Processor/Board and compiler are you using?

windows 7 system and with the visual studio 2019 professional

What LVGL version are you using?

v7.1

What do you want to achieve?

Create a screen backstage not the lv_scr_act().

What have you tried so far?

I create the screen named “incoming” which base on lv_scr_act(),but at the same time I want to create a screen named “message” backstage instead of cover the “incoming” screen.So when I delete the “incoming” screen,the “message” screen will show, but I don’t know how to do it.

Code to reproduce

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Screenshot and/or video

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2

You can create two lv_objs on the incoming screen. The first one (in the background) can be used as “message”. The second can be used as “incoming”. That way you can create objects in the background without them being visible.

3

Thank you very much I try it and it success,The first one has it’s own address and the second is base on lv_scr_act().
If one day,the LVGL library function is perfect,is it charge ?

4

Sorry; I didn’t understand your question. Maybe there’s a translation issue?

5

I am sorry,My English is so pool.Does the LVGL tool will not free?

6

As far as I know there are no plans to make LVGL itself a paid product (though extra tools and services could be commercial).

1 Like
7

Exactly as @embeddedt said. We are planning to keep LVGL free under MIT license as now but we do have paid services and we are developing paid tools.