diff options
Diffstat (limited to 'src/lib/evas/gesture/efl_canvas_gesture_touch.c')
| -rw-r--r-- | src/lib/evas/gesture/efl_canvas_gesture_touch.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/lib/evas/gesture/efl_canvas_gesture_touch.c b/src/lib/evas/gesture/efl_canvas_gesture_touch.c new file mode 100644 index 0000000000..9f997f59e6 --- /dev/null +++ b/src/lib/evas/gesture/efl_canvas_gesture_touch.c @@ -0,0 +1,169 @@ +#include "efl_canvas_gesture_private.h" + +#define MY_CLASS EFL_CANVAS_GESTURE_TOUCH_CLASS + +typedef struct _Pointer_Data +{ + struct + { + Eina_Vector2 pos; + double timestamp; + } start, prev, cur; + Efl_Pointer_Action action; +} Pointer_Data; + +typedef struct _Efl_Canvas_Gesture_Touch_Data +{ + Efl_Canvas_Gesture_Touch_State state; + Eina_Hash *touch_points; + int touch_down; + Eina_Bool multi_touch; + Eo *target; +} Efl_Canvas_Gesture_Touch_Data; + + +// This event object accumulates all the touch points +// that are directed to a particular object from the +// first finger down to the last finger up + +static void _hash_free_cb(Pointer_Data *point) +{ + free(point); +} + +static inline void +_touch_points_reset(Efl_Canvas_Gesture_Touch_Data *pd) +{ + eina_hash_free(pd->touch_points); + pd->touch_points = eina_hash_int32_new(EINA_FREE_CB(_hash_free_cb)); + pd->touch_down = 0; + pd->state = EFL_GESTURE_TOUCH_UNKNOWN; +} + +EOLIAN static Efl_Object * +_efl_canvas_gesture_touch_efl_object_constructor(Eo *obj, Efl_Canvas_Gesture_Touch_Data *pd) +{ + obj = efl_constructor(efl_super(obj, MY_CLASS)); + _touch_points_reset(pd); + return obj; +} + +EOLIAN static void +_efl_canvas_gesture_touch_efl_object_destructor(Eo *obj, Efl_Canvas_Gesture_Touch_Data *pd) +{ + eina_hash_free(pd->touch_points); + efl_destructor(efl_super(obj, MY_CLASS)); +} + +EOLIAN static Efl_Canvas_Gesture_Touch_State +_efl_canvas_gesture_touch_state_get(const Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd) +{ + return pd->state; +} + +EOLIAN static void +_efl_canvas_gesture_touch_point_record(Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd, + int id, Eina_Vector2 pos, double timestamp, Efl_Pointer_Action action) +{ + Pointer_Data *point = eina_hash_find(pd->touch_points, &id); + + if (action == EFL_POINTER_ACTION_DOWN) + pd->touch_down++; + else if ((action == EFL_POINTER_ACTION_UP) || + (action == EFL_POINTER_ACTION_CANCEL)) + pd->touch_down--; + EINA_SAFETY_ON_FALSE_GOTO(pd->touch_down >= 0, bad_fingers); + + if (point) + { + // the point already exists. update the cur and prev point + point->prev = point->cur; + point->cur.pos = pos; + point->cur.timestamp = timestamp; + } + else + { + // new finger + if (!id && (action != EFL_POINTER_ACTION_DOWN)) + { + // discard any other event + return; + } + point = calloc(1, sizeof(Pointer_Data)); + if (!point) return; + point->start.pos = point->prev.pos = point->cur.pos = pos; + point->start.timestamp = point->prev.timestamp = point->cur.timestamp = timestamp; + + // add to the hash + eina_hash_add(pd->touch_points, &id, point); + // FIXME: finger_list was broken + if (id) + pd->multi_touch = EINA_TRUE; + } + point->action = action; + + if (!id && (action == EFL_POINTER_ACTION_DOWN)) + { + pd->state = EFL_GESTURE_TOUCH_BEGIN; + } + else if ((action == EFL_POINTER_ACTION_UP) && (pd->touch_down == 0)) + { + pd->state = EFL_GESTURE_TOUCH_END; + } + else + { + pd->state = EFL_GESTURE_TOUCH_UPDATE; + } + return; + +bad_fingers: + ERR("Inconsistent touch events received!"); + _touch_points_reset(pd); +} + +EOLIAN static Eina_Bool +_efl_canvas_gesture_touch_multi_touch_get(const Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd) +{ + return pd->multi_touch; +} + +EOLIAN static Eina_Vector2 +_efl_canvas_gesture_touch_start_point_get(const Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd) +{ + int tool = 0; + Pointer_Data *point = eina_hash_find(pd->touch_points, &tool); + Eina_Vector2 vec = { 0, 0 }; + + if (!point) + return vec; + + return point->start.pos; +} + +EOLIAN static Eina_Vector2 +_efl_canvas_gesture_touch_delta(const Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd, int tool) +{ + Pointer_Data *point = eina_hash_find(pd->touch_points, &tool); + Eina_Vector2 vec = { 0, 0 }; + + if (!point) + return vec; + + eina_vector2_subtract(&vec, &point->cur.pos, &point->prev.pos); + return vec; +} + +EOLIAN static Eina_Vector2 +_efl_canvas_gesture_touch_distance(const Eo *obj EINA_UNUSED, Efl_Canvas_Gesture_Touch_Data *pd, int tool) +{ + Pointer_Data *point = eina_hash_find(pd->touch_points, &tool); + Eina_Vector2 vec = { 0, 0 }; + + if (!point) + return vec; + + eina_vector2_subtract(&vec, &point->cur.pos, &point->start.pos); + return vec; +} + +#include "efl_canvas_gesture_touch.eo.c" |