Hi.
That’s a great question.
 
To find out, we need to dig into the LVGL documentation:

• https://docs.lvgl.io/master/details/main-modules/indev.html

 
From that page, if you search for “long_press_time”, we can see that to define and use the long_press_time for an input device in LVGL, you need to configure the lv_indev_t structure’s long_press_time parameter.
 
So, in the setup(), we can define that parameter after initializing the LVGL input device (after these lines):
 

// Initialize an LVGL input device object (Touchscreen)
lv_indev_t * indev = lv_indev_create();
lv_indev_set_type(indev, LV_INDEV_TYPE_POINTER);

 

Since the long_press_time is a parameter of the lv_indev_t structure (now created as indev), we can set it as follows:
 

indev->long_press_time = 2000; /* Set long press time to 2000 ms */

Adjust for your desired time.
 
If you need information about any LVGL function, variable, or parameter, you just need to search for it here: 

• https://docs.lvgl.io/master/search.html?q=long_press_time&check_keywords=yes&area=default

In this case, I’m setting the search for the long_press_time parameter.
 

I hope this helps, and I’m sorry for the delay in my response.
 
Regards,
Sara

Hi Sara,
Thanks for the answer. I was under the impression that the long_press_time was already inside the sketch. But now i understand i had to search the LVGL lib. Great answer. Somewhat complicated for me because i am a relative newby, but it gives me some grip.

Regards,
Martin

It works. Thanks.

Great!
 
I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara