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Initial commit: TXW82x FPV v2.7.0.7-42229 SDK + project sources

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zouhaitao
2026-07-06 11:30:13 +08:00
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12
sdk/lib/lvgl/examples/widgets/checkbox/index.rst Normal file
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Simple Checkboxes
"""""""""""""""""
.. lv_example:: widgets/checkbox/lv_example_checkbox_1
:language: c
Checkboxes as radio buttons
"""""""""""""""""""""""""""
.. lv_example:: widgets/checkbox/lv_example_checkbox_2
:language: c

46
sdk/lib/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_CHECKBOX && LV_BUILD_EXAMPLES
static void event_handler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
LV_UNUSED(obj);
if(code == LV_EVENT_VALUE_CHANGED) {
const char * txt = lv_checkbox_get_text(obj);
const char * state = lv_obj_get_state(obj) & LV_STATE_CHECKED ? "Checked" : "Unchecked";
LV_UNUSED(txt);
LV_UNUSED(state);
LV_LOG_USER("%s: %s", txt, state);
}
}
void lv_example_checkbox_1(void)
{
lv_obj_set_flex_flow(lv_scr_act(), LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(lv_scr_act(), LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER);
lv_obj_t * cb;
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Apple");
lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Banana");
lv_obj_add_state(cb, LV_STATE_CHECKED);
lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Lemon");
lv_obj_add_state(cb, LV_STATE_DISABLED);
lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_obj_add_state(cb, LV_STATE_CHECKED | LV_STATE_DISABLED);
lv_checkbox_set_text(cb, "Melon\nand a new line");
lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
lv_obj_update_layout(cb);
}
#endif

36
sdk/lib/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.py Normal file
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def event_handler(e):
code = e.get_code()
obj = e.get_target()
if code == lv.EVENT.VALUE_CHANGED:
txt = obj.get_text()
if obj.get_state() & lv.STATE.CHECKED:
state = "Checked"
else:
state = "Unchecked"
print(txt + ":" + state)
lv.scr_act().set_flex_flow(lv.FLEX_FLOW.COLUMN)
lv.scr_act().set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.CENTER)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Apple")
cb.add_event_cb(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Banana")
cb.add_state(lv.STATE.CHECKED)
cb.add_event_cb(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Lemon")
cb.add_state(lv.STATE.DISABLED)
cb.add_event_cb(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
cb.set_text("Melon")
cb.add_event_cb(event_handler, lv.EVENT.ALL, None)
cb.update_layout()

86
sdk/lib/lvgl/examples/widgets/checkbox/lv_example_checkbox_2.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_CHECKBOX && LV_BUILD_EXAMPLES
static lv_style_t style_radio;
static lv_style_t style_radio_chk;
static uint32_t active_index_1 = 0;
static uint32_t active_index_2 = 0;
static void radio_event_handler(lv_event_t * e)
{
uint32_t * active_id = lv_event_get_user_data(e);
lv_obj_t * cont = lv_event_get_current_target(e);
lv_obj_t * act_cb = lv_event_get_target(e);
lv_obj_t * old_cb = lv_obj_get_child(cont, *active_id);
/*Do nothing if the container was clicked*/
if(act_cb == cont) return;
lv_obj_clear_state(old_cb, LV_STATE_CHECKED); /*Uncheck the previous radio button*/
lv_obj_add_state(act_cb, LV_STATE_CHECKED); /*Uncheck the current radio button*/
*active_id = lv_obj_get_index(act_cb);
LV_LOG_USER("Selected radio buttons: %d, %d", (int)active_index_1, (int)active_index_2);
}
static void radiobutton_create(lv_obj_t * parent, const char * txt)
{
lv_obj_t * obj = lv_checkbox_create(parent);
lv_checkbox_set_text(obj, txt);
lv_obj_add_flag(obj, LV_OBJ_FLAG_EVENT_BUBBLE);
lv_obj_add_style(obj, &style_radio, LV_PART_INDICATOR);
lv_obj_add_style(obj, &style_radio_chk, LV_PART_INDICATOR | LV_STATE_CHECKED);
}
/**
* Checkboxes as radio buttons
*/
void lv_example_checkbox_2(void)
{
/* The idea is to enable `LV_OBJ_FLAG_EVENT_BUBBLE` on checkboxes and process the
* `LV_EVENT_CLICKED` on the container.
* A variable is passed as event user data where the index of the active
* radiobutton is saved */
lv_style_init(&style_radio);
lv_style_set_radius(&style_radio, LV_RADIUS_CIRCLE);
lv_style_init(&style_radio_chk);
lv_style_set_bg_img_src(&style_radio_chk, NULL);
uint32_t i;
char buf[32];
lv_obj_t * cont1 = lv_obj_create(lv_scr_act());
lv_obj_set_flex_flow(cont1, LV_FLEX_FLOW_COLUMN);
lv_obj_set_size(cont1, lv_pct(40), lv_pct(80));
lv_obj_add_event_cb(cont1, radio_event_handler, LV_EVENT_CLICKED, &active_index_1);
for(i = 0; i < 5; i++) {
lv_snprintf(buf, sizeof(buf), "A %d", (int)i + 1);
radiobutton_create(cont1, buf);
}
/*Make the first checkbox checked*/
lv_obj_add_state(lv_obj_get_child(cont1, 0), LV_STATE_CHECKED);
lv_obj_t * cont2 = lv_obj_create(lv_scr_act());
lv_obj_set_flex_flow(cont2, LV_FLEX_FLOW_COLUMN);
lv_obj_set_size(cont2, lv_pct(40), lv_pct(80));
lv_obj_set_x(cont2, lv_pct(50));
lv_obj_add_event_cb(cont2, radio_event_handler, LV_EVENT_CLICKED, &active_index_2);
for(i = 0; i < 3; i++) {
lv_snprintf(buf, sizeof(buf), "B %d", (int)i + 1);
radiobutton_create(cont2, buf);
}
/*Make the first checkbox checked*/
lv_obj_add_state(lv_obj_get_child(cont2, 0), LV_STATE_CHECKED);
}
#endif

83
sdk/lib/lvgl/examples/widgets/checkbox/lv_example_checkbox_2.py Normal file
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import time
class LV_Example_Checkbox_2:
def __init__(self):
#
# Checkboxes as radio buttons
#
# The idea is to enable `LV_OBJ_FLAG_EVENT_BUBBLE` on checkboxes and process the
#`LV.EVENT.CLICKED` on the container.
# Since user_data cannot be used to pass parameters in MicroPython I use an instance variable to
# keep the index of the active button
self.active_index_1 = 0
self.active_index_2 = 0
self.style_radio = lv.style_t()
self.style_radio.init()
self.style_radio.set_radius(lv.RADIUS_CIRCLE)
self.style_radio_chk = lv.style_t()
self.style_radio_chk.init()
self.style_radio_chk.init()
self.style_radio_chk.set_bg_img_src(None)
self.cont1 = lv.obj(lv.scr_act())
self.cont1.set_flex_flow(lv.FLEX_FLOW.COLUMN)
self.cont1.set_size(lv.pct(40), lv.pct(80))
self.cont1.add_event_cb(self.radio_event_handler, lv.EVENT.CLICKED, None)
for i in range(5):
txt = "A {:d}".format(i+1)
self.radiobutton_create(self.cont1,txt)
# Make the first checkbox checked
#lv_obj_add_state(lv_obj_get_child(self.cont1, 0), LV_STATE_CHECKED);
self.cont1.get_child(0).add_state(lv.STATE.CHECKED)
self.cont2 = lv.obj(lv.scr_act())
self.cont2.set_flex_flow(lv.FLEX_FLOW.COLUMN)
self.cont2.set_size(lv.pct(40), lv.pct(80))
self.cont2.set_x(lv.pct(50))
self.cont2.add_event_cb(self.radio_event_handler, lv.EVENT.CLICKED, None)
for i in range(3):
txt = "B {:d}".format(i+1)
self.radiobutton_create(self.cont2,txt)
# Make the first checkbox checked*/
self.cont2.get_child(0).add_state(lv.STATE.CHECKED)
def radio_event_handler(self,e):
cont = e.get_current_target()
act_cb = e.get_target()
if cont == self.cont1:
active_id = self.active_index_1
else:
active_id = self.active_index_2
old_cb = cont.get_child(active_id)
# Do nothing if the container was clicked
if act_cb == cont:
return
old_cb.clear_state(lv.STATE.CHECKED) # Uncheck the previous radio button
act_cb.add_state(lv.STATE.CHECKED) # Uncheck the current radio button
if cont == self.cont1:
self.active_index_1 = act_cb.get_index()
# print("active index 1: ", self.active_index_1)
else:
self.active_index_2 = act_cb.get_index()
# print("active index 2: ", self.active_index_2)
print("Selected radio buttons: {:d}, {:d}".format(self.active_index_1, self.active_index_2))
def radiobutton_create(self,parent, txt):
obj = lv.checkbox(parent)
obj.set_text(txt)
obj.add_flag(lv.obj.FLAG.EVENT_BUBBLE)
obj.add_style(self.style_radio, lv.PART.INDICATOR)
obj.add_style(self.style_radio_chk, lv.PART.INDICATOR | lv.STATE.CHECKED)
lv_example_checkbox_2 = LV_Example_Checkbox_2()