Ok, with [Release v7.11.0] also lv_obj_set_style_local_shadow_spread(slider, LV_SLIDER_PART_BG, LV_STATE_DEFAULT, 4); work good, also gradient on Knob work good.
Here a photo with light theme:
or a dark theme
But photo of a screen is no so good as usual, i need implement a switch on Esp32 for save a screenshot or wifi or Sd or by serial.
The author of this library and of Edgeline has done and is doing a great job, but I have to make a note on the explanations of the installation of the library and the setting according to the machine that must use it, also regarding where the file is to be saved. configuration, which depending on the version of the library sometimes had to be placed in the SRC directory, other times it worked in the sketch directory.
And even saying NEXT TO doesn’t make it clear to me, just say clearly that it should be placed in the main branch of the libraries directory.
Then for example in the lv_conf.h file, for use with ESP32 and the Arduino Gui, you need to change the line where there is HAL setting in #define LV_TICK_CUSTOM 1 otherwise the touch screen does not respond.
And sincerely i dont have see any reply at this request of a simple example by users of this forum…ok
I have tried here to give an answer and I hope it will be useful to someone else in the near future who has the same configuration problems. And I also attach the file that works with version 7.11, integrated with the C file generated by Edgeline, and in my mind I have a converter (in VB.net) that generates the .ino file from Edgeline file (if the author has not already thought about it) ready to use.
ESP32_Screen_Fade_LVGL3.zip (3.1 KB)