Touchpadless navigation example questions

Mountions · April 15, 2020, 11:17pm

I’m using esp32 and platformIO

I’d like to use up/down/left/right/OK external keys to navigate the GUI and found there is a touchpadless navigation example which is I’m lookinfg for. It navigates among the objects using the Tab key. But when I look into the code, I don’t see the code reads external tab key or arrow key. Does anyone know how it works? Even in lv_indev.c there is no code handle tab/up/down keys. Thank you very much!

kisvegabor · April 20, 2020, 9:16am

Take a look at this:

github.com

littlevgl/lv_examples/blob/master/lv_tutorial/10_keyboard/lv_tutorial_keyboard.c

/**
 * @file lv_tutorial_keyboard_simkpad.c
 *
 */

/*
 * -------------------------------------------
 * Learn how to use a keyboard/keypad device
 * -------------------------------------------
 *
 * You need two things to use keypad/keyboard:
 *
 * INPUT DEVICE DRIVER
 * - Similarly to touchpad you need to register an 'lv_indev_drv_t' driver
 * - For control keys you should use LV_KEY_... from lv_group.h (e.g. LV_KEY_NEXT)
 * -
 *
 *
 * OBJECT GROUP
 * - You can iterate through objects in a group (like using 'tab' on PC) and adjust/modify them

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Mountions · April 22, 2020, 10:44pm

Thank you very much! I updated key and key state in the forever loop. It seems working. But not sure if it is the correct way to do this. Another questions, I want a splash screen at the beginning, how to do this? Is there an example? Thank you!

kisvegabor · April 29, 2020, 7:56am

Please open a new topic for a different question.

111 · October 15, 2020, 4:31pm

Can you reload please the example of the navigation tutorial, link now not available

embeddedt · October 15, 2020, 5:19pm

This is probably the closest example: https://github.com/lvgl/lv_examples/tree/master/src/lv_demo_keypad_encoder

111 · October 15, 2020, 7:19pm

Thanks for the help