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#include "e.h"
#define SMART_NAME "e_pan"
#define API_ENTRY E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if ((!obj) || (!sd) || (evas_object_type_get(obj) && strcmp(evas_object_type_get(obj), SMART_NAME)))
#define INTERNAL_ENTRY E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if (!sd) return;
typedef struct _E_Smart_Data E_Smart_Data;
struct _E_Smart_Data
{
Evas_Object *smart_obj, *child_obj;
Evas_Coord x, y, w, h;
Evas_Coord child_w, child_h, px, py;
};
/* local subsystem functions */
static void _e_smart_child_del_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void _e_smart_child_resize_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void _e_smart_reconfigure(E_Smart_Data *sd);
static void _e_smart_add(Evas_Object *obj);
static void _e_smart_del(Evas_Object *obj);
static void _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
static void _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
static void _e_smart_show(Evas_Object *obj);
static void _e_smart_hide(Evas_Object *obj);
static void _e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
static void _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip);
static void _e_smart_clip_unset(Evas_Object *obj);
static void _e_smart_init(void);
/* local subsystem globals */
static Evas_Smart *_e_smart = NULL;
/* externally accessible functions */
E_API Evas_Object *
e_pan_add(Evas *evas)
{
_e_smart_init();
return evas_object_smart_add(evas, _e_smart);
}
E_API void
e_pan_child_set(Evas_Object *obj, Evas_Object *child)
{
API_ENTRY return;
if (child == sd->child_obj) return;
if (sd->child_obj)
{
evas_object_clip_unset(sd->child_obj);
evas_object_smart_member_del(sd->child_obj);
evas_object_event_callback_del(sd->child_obj, EVAS_CALLBACK_FREE, _e_smart_child_del_hook);
evas_object_event_callback_del(sd->child_obj, EVAS_CALLBACK_RESIZE, _e_smart_child_resize_hook);
sd->child_obj = NULL;
}
if (child)
{
int r, g, b, a;
sd->child_obj = child;
evas_object_smart_member_add(sd->child_obj, sd->smart_obj);
evas_object_geometry_get(sd->child_obj, NULL, NULL,
&sd->child_w, &sd->child_h);
evas_object_event_callback_add(child, EVAS_CALLBACK_FREE,
_e_smart_child_del_hook, sd);
evas_object_event_callback_add(child, EVAS_CALLBACK_RESIZE,
_e_smart_child_resize_hook, sd);
evas_object_color_get(sd->smart_obj, &r, &g, &b, &a);
evas_object_color_set(sd->child_obj, r, g, b, a);
evas_object_clip_set(sd->child_obj, evas_object_clip_get(sd->smart_obj));
if (evas_object_visible_get(sd->smart_obj))
evas_object_show(sd->child_obj);
else evas_object_hide(sd->child_obj);
_e_smart_reconfigure(sd);
}
evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
}
E_API Evas_Object *
e_pan_child_get(Evas_Object *obj)
{
API_ENTRY return NULL;
return sd->child_obj;
}
E_API void
e_pan_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
{
API_ENTRY return;
if (x > (sd->child_w - sd->w)) x = sd->child_w - sd->w;
if (y > (sd->child_h - sd->h)) y = sd->child_h - sd->h;
if (x < 0) x = 0;
if (y < 0) y = 0;
if ((x == sd->px) && (y == sd->py)) return;
sd->px = x;
sd->py = y;
_e_smart_reconfigure(sd);
evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
}
E_API void
e_pan_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
{
API_ENTRY return;
if (x) *x = sd->px;
if (y) *y = sd->py;
}
E_API void
e_pan_max_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
{
API_ENTRY return;
if (x)
{
if (sd->w < sd->child_w) *x = sd->child_w - sd->w;
else *x = 0;
}
if (y)
{
if (sd->h < sd->child_h) *y = sd->child_h - sd->h;
else *y = 0;
}
}
E_API void
e_pan_child_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
{
API_ENTRY return;
if (w) *w = sd->child_w;
if (h) *h = sd->child_h;
}
/* local subsystem functions */
static void
_e_smart_child_del_hook(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
E_Smart_Data *sd;
sd = data;
sd->child_obj = NULL;
evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
}
static void
_e_smart_child_resize_hook(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
{
E_Smart_Data *sd;
Evas_Coord w = 0, h = 0;
sd = data;
if (!sd->child_obj) return;
evas_object_geometry_get(sd->child_obj, NULL, NULL, &w, &h);
if ((w != sd->child_w) || (h != sd->child_h))
{
sd->child_w = w;
sd->child_h = h;
_e_smart_reconfigure(sd);
}
evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
}
static void
_e_smart_reconfigure(E_Smart_Data *sd)
{
if (sd->child_obj)
evas_object_move(sd->child_obj, sd->x - sd->px, sd->y - sd->py);
}
static void
_e_smart_add(Evas_Object *obj)
{
E_Smart_Data *sd;
sd = E_NEW(E_Smart_Data, 1);
if (!sd) return;
sd->smart_obj = obj;
sd->px = 0;
sd->py = 0;
sd->x = 0;
sd->y = 0;
sd->w = 0;
sd->h = 0;
sd->child_w = 0;
sd->child_h = 0;
evas_object_smart_data_set(obj, sd);
}
static void
_e_smart_del(Evas_Object *obj)
{
INTERNAL_ENTRY;
e_pan_child_set(obj, NULL);
E_FREE(sd);
}
static void
_e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
{
INTERNAL_ENTRY;
sd->x = x;
sd->y = y;
_e_smart_reconfigure(sd);
}
static void
_e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
{
INTERNAL_ENTRY;
sd->w = w;
sd->h = h;
_e_smart_reconfigure(sd);
evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
}
static void
_e_smart_show(Evas_Object *obj)
{
INTERNAL_ENTRY;
if (sd->child_obj)
evas_object_show(sd->child_obj);
}
static void
_e_smart_hide(Evas_Object *obj)
{
INTERNAL_ENTRY;
if (sd->child_obj)
evas_object_hide(sd->child_obj);
}
static void
_e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
{
INTERNAL_ENTRY;
if (sd->child_obj)
evas_object_color_set(sd->child_obj, r, g, b, a);
}
static void
_e_smart_clip_set(Evas_Object *obj, Evas_Object *clip)
{
INTERNAL_ENTRY;
if (sd->child_obj)
evas_object_clip_set(sd->child_obj, clip);
}
static void
_e_smart_clip_unset(Evas_Object *obj)
{
INTERNAL_ENTRY;
if (sd->child_obj)
evas_object_clip_unset(sd->child_obj);
}
/* never need to touch this */
static void
_e_smart_init(void)
{
if (_e_smart) return;
{
static const Evas_Smart_Class sc =
{
SMART_NAME,
EVAS_SMART_CLASS_VERSION,
_e_smart_add,
_e_smart_del,
_e_smart_move,
_e_smart_resize,
_e_smart_show,
_e_smart_hide,
_e_smart_color_set,
_e_smart_clip_set,
_e_smart_clip_unset,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
_e_smart = evas_smart_class_new(&sc);
}
}