ecore_idler_example.c

This example shows when Ecore_Idler, Ecore_Idle_Enterer and Ecore_Idle_Exiter are called. See the explanation here.

//Compile with:
// gcc -o ecore_idler_example ecore_idler_example.c `pkg-config --libs --cflags ecore eo`
#include <Ecore.h>
//#include <Ecore_Eo.h>
#include <unistd.h>
struct context // helper struct to give some context to the callbacks
{
int count;
Ecore_Idler *idler;
Ecore_Timer *timer;
};
static int _event_type = 0; // a new type of event will be defined and stored here
static Eina_Bool
_enterer_cb(void *data EINA_UNUSED) // the idle enterer callback
{
printf("IDLE ENTERER: Ecore entering in idle state.\n");
return ECORE_CALLBACK_RENEW; // same as EINA_TRUE
}
static Eina_Bool
_exiter_cb(void *data EINA_UNUSED) // the idle exiter callback
{
printf("IDLE EXITER: Ecore exiting idle state.\n");
return ECORE_CALLBACK_RENEW; // same as EINA_TRUE
}
static Eina_Bool
_idler_cb(void *data) // the idler callback - ran while the mainloop is idle
{
struct context *ctxt = data;
printf("IDLER: executing idler callback while in idle state.\n");
ctxt->count++;
/* each 10 times that the callback gets called, generate an event that
* will wake up the main loop, triggering idle enterers, exiters, etc. */
if ((ctxt->count % 10) == 0)
ecore_event_add(_event_type, NULL, NULL, NULL);
return ECORE_CALLBACK_RENEW; // same as EINA_TRUE
}
static Eina_Bool
_event_handler_cb(void *data, int type EINA_UNUSED, void *event EINA_UNUSED) // event callback
{
struct context *ctxt = data;
printf("EVENT: processing callback for the event received.\n");
if (ctxt->count > 100)
{
ecore_idle_enterer_del(ctxt->enterer);
ecore_idle_exiter_del(ctxt->exiter);
// ecore_idler_del(ctxt->idler);
eo_unref(ctxt->idler);
ctxt->enterer = NULL;
ctxt->exiter = NULL;
ctxt->idler = NULL;
if (ctxt->timer)
{
ecore_timer_del(ctxt->timer);
ctxt->timer = NULL;
}
}
return ECORE_CALLBACK_DONE; // same as EINA_FALSE
}
static Eina_Bool
_timer_cb(void *data)
{
struct context *ctxt = data;
printf("TIMER: timer callback called.\n");
if (ctxt->timer)
ctxt->timer = NULL;
return ECORE_CALLBACK_CANCEL; // same as EINA_FALSE
}
int
main(void)
{
struct context ctxt = {0};
if (!ecore_init())
{
printf("ERROR: Cannot init Ecore!\n");
return -1;
}
_event_type = ecore_event_type_new();
ctxt.enterer = ecore_idle_enterer_add(_enterer_cb, &ctxt);
ctxt.exiter = ecore_idle_exiter_add(_exiter_cb, &ctxt);
ctxt.idler = ecore_idler_add(_idler_cb, &ctxt);
// ctxt.idler = eo_add_custom(ECORE_IDLER_CLASS, NULL, ecore_idler_constructor(_idler_cb, &ctxt));
ctxt.handler = ecore_event_handler_add(_event_type,
_event_handler_cb,
&ctxt);
ctxt.timer = ecore_timer_add(0.0005, _timer_cb, &ctxt);
return 0;
}