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ndg/lib/lvgl/examples/others/fragment/lv_example_fragment_1.c

61 lines
1.7 KiB
C

/**
* @file lv_example_fragment_1.c
* @brief Basic usage of obj fragment
*/
#include "../../lv_examples.h"
#if LV_USE_FRAGMENT && LV_BUILD_EXAMPLES
static void sample_fragment_ctor(lv_fragment_t * self, void * args);
static lv_obj_t * sample_fragment_create_obj(lv_fragment_t * self, lv_obj_t * parent);
static void sample_container_del(lv_event_t * e);
static lv_obj_t * root = NULL;
struct sample_fragment_t {
lv_fragment_t base;
const char * name;
};
static const lv_fragment_class_t sample_cls = {
.constructor_cb = sample_fragment_ctor,
.create_obj_cb = sample_fragment_create_obj,
.instance_size = sizeof(struct sample_fragment_t)
};
void lv_example_fragment_1(void)
{
root = lv_obj_create(lv_scr_act());
lv_obj_set_size(root, LV_PCT(100), LV_PCT(100));
lv_fragment_manager_t * manager = lv_fragment_manager_create(NULL);
/* Clean up the fragment manager before objects in containers got deleted */
lv_obj_add_event_cb(root, sample_container_del, LV_EVENT_DELETE, manager);
lv_fragment_t * fragment = lv_fragment_create(&sample_cls, "Fragment");
lv_fragment_manager_replace(manager, fragment, &root);
}
static void sample_fragment_ctor(lv_fragment_t * self, void * args)
{
((struct sample_fragment_t *) self)->name = args;
}
static lv_obj_t * sample_fragment_create_obj(lv_fragment_t * self, lv_obj_t * parent)
{
lv_obj_t * label = lv_label_create(parent);
lv_obj_set_style_bg_opa(label, LV_OPA_COVER, 0);;
lv_label_set_text_fmt(label, "Hello, %s!", ((struct sample_fragment_t *) self)->name);
return label;
}
static void sample_container_del(lv_event_t * e)
{
lv_fragment_manager_t * manager = (lv_fragment_manager_t *) lv_event_get_user_data(e);
lv_fragment_manager_del(manager);
}
#endif