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samples: lvgl: Extend hello world sample button functionality

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This commit adds a callback to the button to reset the counter when the
button is pressed. The button is automatically created when lvgl
pointer or kscan support is enabled. The same reset functionality was
already available for possible gpio button.

Please make sure to define a zephyr input device in device
tree (e.g. "zephyr,lvgl-pointer-input").

Signed-off-by: Martin Kiepfer <m.kiepfer@teleschirm.org>
This commit is contained in:
Martin Kiepfer 2023-09-09 09:20:57 +02:00 committed by Fabio Baltieri
parent 31cd3b1f61
commit 9339882fbb
1 changed files with 9 additions and 0 deletions
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9
samples/subsys/display/lvgl/src/main.c
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@ -36,6 +36,13 @@ static void button_isr_callback(const struct device *port,
}
#endif
static void lv_btn_click_callback(lv_event_t *e)
{
ARG_UNUSED(e);
count = 0;
}
int main(void)
{
char count_str[11] = {0};
@ -82,6 +89,8 @@ int main(void)
hello_world_button = lv_btn_create(lv_scr_act());
lv_obj_align(hello_world_button, LV_ALIGN_CENTER, 0, 0);
lv_obj_add_event_cb(hello_world_button, lv_btn_click_callback, LV_EVENT_CLICKED,
NULL);
hello_world_label = lv_label_create(hello_world_button);
} else {
hello_world_label = lv_label_create(lv_scr_act());