feat(checkbox): add property interface support

Add property support for checkbox widget with the following property:
- TEXT: checkbox text (LV_PROPERTY_TYPE_TEXT)

Also add test_checkbox_properties() test function.

src/core/lv_obj_property.h

@@ -107,6 +107,7 @@ enum _lv_prop_id_range_boundary_t {
     LV_PROPERTY_ARC_START       = 0x0a00, /* lv_arc.c */
     LV_PROPERTY_BAR_START       = 0x0b00, /* lv_bar.c */
     LV_PROPERTY_SWITCH_START    = 0x0c00, /* lv_switch.c */
+    LV_PROPERTY_CHECKBOX_START  = 0x0d00, /* lv_checkbox.c */
 
     /*Special ID, use it to extend ID and make sure it's unique and compile time determinant*/
     LV_PROPERTY_ID_BUILTIN_LAST = 0xffff, /*ID of 0x10000 ~ 0xfffffff is reserved for user*/

src/widgets/checkbox/lv_checkbox.c

@@ -38,6 +38,17 @@ static void lv_checkbox_draw(lv_event_t * e);
 /**********************
  *  STATIC VARIABLES
  **********************/
+
+#if LV_USE_OBJ_PROPERTY
+static const lv_property_ops_t lv_checkbox_properties[] = {
+    {
+        .id = LV_PROPERTY_CHECKBOX_TEXT,
+        .setter = lv_checkbox_set_text,
+        .getter = lv_checkbox_get_text,
+    },
+};
+#endif
+
 const lv_obj_class_t lv_checkbox_class = {
     .constructor_cb = lv_checkbox_constructor,
     .destructor_cb = lv_checkbox_destructor,
@@ -48,6 +59,7 @@ const lv_obj_class_t lv_checkbox_class = {
     .instance_size = sizeof(lv_checkbox_t),
     .base_class = &lv_obj_class,
     .name = "lv_checkbox",
+    LV_PROPERTY_CLASS_FIELDS(checkbox, CHECKBOX)
 };
 
 /**********************

src/widgets/checkbox/lv_checkbox.h

@@ -24,6 +24,13 @@ extern "C" {
 
 LV_ATTRIBUTE_EXTERN_DATA extern const lv_obj_class_t lv_checkbox_class;
 
+#if LV_USE_OBJ_PROPERTY
+enum _lv_property_checkbox_id_t {
+    LV_PROPERTY_ID(CHECKBOX, TEXT, LV_PROPERTY_TYPE_TEXT, 0),
+    LV_PROPERTY_CHECKBOX_END,
+};
+#endif
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/

src/widgets/property/lv_checkbox_properties.c

@@ -0,0 +1,23 @@
+
+/**
+ * GENERATED FILE, DO NOT EDIT IT!
+ * @file lv_checkbox_properties.c
+ */
+
+#include "../checkbox/lv_checkbox.h"
+
+#if LV_USE_OBJ_PROPERTY && LV_USE_OBJ_PROPERTY_NAME
+
+#if LV_USE_CHECKBOX
+/**
+ * Checkbox widget property names, name must be in order.
+ * Generated code from properties.py
+ */
+/* *INDENT-OFF* */
+const lv_property_name_t lv_checkbox_property_names[1] = {
+    {"text",                   LV_PROPERTY_CHECKBOX_TEXT,},
+};
+#endif /*LV_USE_CHECKBOX*/
+
+/* *INDENT-ON* */
+#endif

src/widgets/property/lv_obj_property_names.h

@@ -13,6 +13,7 @@
     extern const lv_property_name_t lv_animimage_property_names[4];
     extern const lv_property_name_t lv_arc_property_names[11];
     extern const lv_property_name_t lv_bar_property_names[6];
+    extern const lv_property_name_t lv_checkbox_property_names[1];
     extern const lv_property_name_t lv_dropdown_property_names[9];
     extern const lv_property_name_t lv_image_property_names[11];
     extern const lv_property_name_t lv_keyboard_property_names[4];

tests/src/test_cases/widgets/test_checkbox.c

@@ -135,4 +135,21 @@ void test_checkbox_style_opa(void)
     TEST_ASSERT_EQUAL_SCREENSHOT("widgets/checkbox_1.png");
 }
 
+void test_checkbox_properties(void)
+{
+#if LV_USE_OBJ_PROPERTY
+    lv_obj_t * obj = lv_checkbox_create(lv_screen_active());
+    lv_property_t prop = { };
+
+    /* Test TEXT property */
+    prop.id = LV_PROPERTY_CHECKBOX_TEXT;
+    prop.ptr = "Test Checkbox";
+    TEST_ASSERT_TRUE(lv_obj_set_property(obj, &prop) == LV_RESULT_OK);
+    TEST_ASSERT_EQUAL_STRING("Test Checkbox", lv_obj_get_property(obj, LV_PROPERTY_CHECKBOX_TEXT).ptr);
+    TEST_ASSERT_EQUAL_STRING("Test Checkbox", lv_checkbox_get_text(obj));
+
+    lv_obj_delete(obj);
+#endif
+}
+
 #endif