Tizen Native API  5.5
Ecore Animator functions

Ecore animators are a helper to simplify creating animations.

Creating an animation is as simple as saying for how long it should be run and having a callback that does the animation, something like this:

 static Eina_Bool
 _do_animation(void *data, double pos)
 {
    evas_object_move(data, 100 * pos, 100 * pos);
    ... do some more animating ...
 }
 ...
 ecore_animator_timeline_add(2, _do_animation, my_evas_object);

In the sample above we create an animation to move my_evas_object from position (0,0) to (100,100) in 2 seconds.

If your animation will run for an unspecified amount of time you can use ecore_animator_add(), which is like using ecore_timer_add() with the interval being the framerate. Note that this has tangible benefits to creating a timer for each animation in terms of performance.

For a more detailed example that show several animation see Ecore animator example.

Functions

void ecore_animator_frametime_set (double frametime)
 Sets the animator call interval in seconds.
double ecore_animator_frametime_get (void)
 Gets the animator call interval in seconds.
double ecore_animator_pos_map (double pos, Ecore_Pos_Map map, double v1, double v2)
 Maps an input position from 0.0 to 1.0 along a timeline to a position in a different curve.
double ecore_animator_pos_map_n (double pos, Ecore_Pos_Map map, int v_size, double *v)
 Maps an input position from 0.0 to 1.0 along a timeline to a position in a different curve.
void ecore_animator_source_set (Ecore_Animator_Source source)
 Sets the source of animator ticks for the mainloop.
Ecore_Animator_Source ecore_animator_source_get (void)
 Gets the animator source currently set.
void ecore_animator_custom_source_tick_begin_callback_set (Ecore_Cb func, const void *data)
 Sets the function that begins a custom animator tick source.
void ecore_animator_custom_source_tick_end_callback_set (Ecore_Cb func, const void *data)
 Sets the function that ends a custom animator tick source.
void ecore_animator_custom_tick (void)
 Triggers a custom animator tick.

Typedefs

typedef Eina_Bool(* Ecore_Timeline_Cb )(void *data, double pos)

Typedef Documentation

A callback run for a task (animators with runtimes)


Enumeration Type Documentation

Defines the timing sources for animators.

Enumerator:
ECORE_ANIMATOR_SOURCE_TIMER 

The default system clock/timer based animator that ticks every "frametime" seconds

ECORE_ANIMATOR_SOURCE_CUSTOM 

A custom animator trigger that you need to call ecore_animator_custom_tick() to make it tick

Defines the position mappings for the animation.

Enumerator:
ECORE_POS_MAP_LINEAR 

Linear 0.0 -> 1.0

ECORE_POS_MAP_ACCELERATE 

Start slow then speed up

ECORE_POS_MAP_DECELERATE 

Start fast then slow down

ECORE_POS_MAP_SINUSOIDAL 

Start slow, speed up then slow down at end

ECORE_POS_MAP_ACCELERATE_FACTOR 

Start slow then speed up, v1 being a power factor, 0.0 being linear, 1.0 being normal accelerate, 2.0 being much more pronounced accelerate (squared), 3.0 being cubed, etc.

ECORE_POS_MAP_DECELERATE_FACTOR 

Start fast then slow down, v1 being a power factor, 0.0 being linear, 1.0 being normal decelerate, 2.0 being much more pronounced decelerate (squared), 3.0 being cubed, etc.

ECORE_POS_MAP_SINUSOIDAL_FACTOR 

Start slow, speed up then slow down at end, v1 being a power factor, 0.0 being linear, 1.0 being normal sinusoidal, 2.0 being much more pronounced sinusoidal (squared), 3.0 being cubed, etc.

ECORE_POS_MAP_DIVISOR_INTERP 

Start at gradient * v1, interpolated via power of v2 curve

ECORE_POS_MAP_BOUNCE 

Start at 0.0 then "drop" like a ball bouncing to the ground at 1.0, and bounce v2 times, with decay factor of v1

ECORE_POS_MAP_SPRING 

Start at 0.0 then "wobble" like a spring rest position 1.0, and wobble v2 times, with decay factor of v1

ECORE_POS_MAP_CUBIC_BEZIER 

Follow the cubic-bezier curve calculated with the control points (x1, y1), (x2, y2)


Function Documentation

Ecore_Animator* ecore_animator_add ( Ecore_Task_Cb  func,
const void *  data 
)

Adds an animator to call func at every animation tick during main loop execution.

Parameters:
funcThe function to call when it ticks off
dataThe data to pass to the function
Returns:
A handle to the new animator

This function adds an animator and returns its handle on success and NULL on failure. The function func will be called every N seconds where N is the frametime interval set by ecore_animator_frametime_set(). The function will be passed the data pointer as its parameter.

When the animator func is called, it must return a boolean value. If it returns EINA_TRUE (or ECORE_CALLBACK_RENEW), it will be called again at the next tick, or if it returns EINA_FALSE (or ECORE_CALLBACK_CANCEL) it will be deleted automatically making any references/handles for it invalid.

See also:
ecore_animator_timeline_add()
ecore_animator_frametime_set()
Note:
The default frametime value is 1/30th of a second.
Since :
2.3.1
Examples:
ecore_animator_example.c, efl_thread_6.c, evas-map-utils.c, and glview_example_01.c.
void ecore_animator_custom_source_tick_begin_callback_set ( Ecore_Cb  func,
const void *  data 
)

Sets the function that begins a custom animator tick source.

Parameters:
funcThe function to call when ticking is to begin
dataThe data passed to the tick begin function as its parameter

The Ecore Animator infrastructure handles tracking if animators are needed or not and which ones need to be called and when, but when the tick source is custom, you have to provide a tick source by calling ecore_animator_custom_tick() to indicate a frame tick happened. In order to allow the source of ticks to be dynamically enabled or disabled as needed, the func when set is called to enable the tick source to produce tick events that call ecore_animator_custom_tick(). If func is NULL then no function is called to begin custom ticking.

Warning:
Do not use this function unless you know what you are doing.
See also:
ecore_animator_source_set()
ecore_animator_custom_source_tick_end_callback_set()
ecore_animator_custom_tick()
Since :
2.3.1
void ecore_animator_custom_source_tick_end_callback_set ( Ecore_Cb  func,
const void *  data 
)

Sets the function that ends a custom animator tick source.

Parameters:
funcThe function to call when ticking is to end
dataThe data passed to the tick end function as its parameter

This function is a matching pair to the function set by ecore_animator_custom_source_tick_begin_callback_set() and is called when ticking is to stop. If func is NULL then no function will be called to stop ticking. For more information please see ecore_animator_custom_source_tick_begin_callback_set().

Warning:
Do not use this function unless you know what you are doing.
See also:
ecore_animator_source_set()
ecore_animator_custom_source_tick_begin_callback_set()
ecore_animator_custom_tick()
Since :
2.3.1
void ecore_animator_custom_tick ( void  )

Triggers a custom animator tick.

When animator source is set to ECORE_ANIMATOR_SOURCE_CUSTOM, then calling this function triggers a run of all animators currently registered with Ecore as this indicates a "frame tick" happened. This will do nothing if the animator source(set by ecore_animator_source_set()) is not set to ECORE_ANIMATOR_SOURCE_CUSTOM.

Warning:
Do not use this function unless you know what you are doing.
See also:
ecore_animator_source_set()
ecore_animator_custom_source_tick_begin_callback_set
ecore_animator_custom_source_tick_end_callback_set()()
Since :
2.3.1
void* ecore_animator_del ( Ecore_Animator *  animator)

Deletes the specified animator from the animator list.

Parameters:
animatorThe animator to delete
Returns:
The data pointer set for the animator on add

Deletes the specified animator from the set of animators that are executed during main loop execution. This function returns the data parameter that was being passed to the callback on success, or NULL on failure. After this call returns the specified animator object animator is invalid and should not be used again. It will not get called again after deletion.

Since :
2.3.1
Examples:
ecore_animator_example.c, and glview_example_01.c.
double ecore_animator_frametime_get ( void  )

Gets the animator call interval in seconds.

Returns:
The time in second in between animator ticks.

This function retrieves the time in seconds between animator ticks.

See also:
ecore_animator_frametime_set()
Since :
2.3.1
void ecore_animator_frametime_set ( double  frametime)

Sets the animator call interval in seconds.

Parameters:
frametimeThe time in seconds in between animator ticks.

This function sets the time interval (in seconds) between animator ticks. At every tick the callback of every existing animator will be called.

Warning:
Too small a value may cause performance issues and too high a value may cause your animation to seem "jerky".
Note:
The default frametime value is 1/60th of a second.
Since :
2.3.1
Examples:
ecore_animator_example.c.
void ecore_animator_freeze ( Ecore_Animator *  animator)

Suspends the specified animator.

Parameters:
animatorThe animator to delete

The specified animator will be temporarily removed from the set of animators that are executed during main loop.

Warning:
Freezing an animator doesn't freeze accounting of how long that animator has been running. Therefore if the animator was created with ecore_animator_timeline_add() the pos argument given to the callback will increase as if the animator hadn't been frozen and the animator may have it's execution halted if runtime elapsed.
Since :
2.3.1
Examples:
ecore_animator_example.c.
double ecore_animator_pos_map ( double  pos,
Ecore_Pos_Map  map,
double  v1,
double  v2 
)

Maps an input position from 0.0 to 1.0 along a timeline to a position in a different curve.

Parameters:
posThe input position to map
mapThe mapping to use
v1A parameter use by the mapping (pass 0.0 if not used)
v2A parameter use by the mapping (pass 0.0 if not used)
Returns:
The mapped value

Takes an input position (0.0 to 1.0) and maps to a new position (normally between 0.0 and 1.0, but it may go above/below 0.0 or 1.0 to show that it has "overshot" the mark) using some interpolation (mapping) algorithm.

This function useful to create non-linear animations. It offers a variety of possible animation curves to be used:

  • ECORE_POS_MAP_LINEAR - Linear, returns pos
  • ECORE_POS_MAP_ACCELERATE - Start slow then speed up
  • ECORE_POS_MAP_DECELERATE - Start fast then slow down
  • ECORE_POS_MAP_SINUSOIDAL - Start slow, speed up then slow down at end
  • ECORE_POS_MAP_ACCELERATE_FACTOR - Start slow then speed up, v1 being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_ACCELERATE, 2.0 being much more pronounced accelerate (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_DECELERATE_FACTOR - Start fast then slow down, v1 being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_DECELERATE, 2.0 being much more pronounced decelerate (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_SINUSOIDAL_FACTOR - Start slow, speed up then slow down at end, v1 being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_SINUSOIDAL, 2.0 being much more pronounced sinusoidal (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_DIVISOR_INTERP - Start at gradient * v1, interpolated via power of v2 curve
  • ECORE_POS_MAP_BOUNCE - Start at 0.0 then "drop" like a ball bouncing to the ground at 1.0, and bounce v2 times, with decay factor of v1
  • ECORE_POS_MAP_SPRING - Start at 0.0 then "wobble" like a spring rest position 1.0, and wobble v2 times, with decay factor of v1
    Note:
    When not listed v1 and v2 have no effect.
    ecore-pos-map.png

One way to use this would be:

 double pos; // input position in a timeline from 0.0 to 1.0
 double out; // output position after mapping
 int x1, y1, x2, y2; // x1 & y1 are start position, x2 & y2 are end position
 int x, y; // x & y are the calculated position

 out = ecore_animator_pos_map(pos, ECORE_POS_MAP_BOUNCE, 1.8, 7);
 x = (x1 * out) + (x2 * (1.0 - out));
 y = (y1 * out) + (y2 * (1.0 - out));
 move_my_object_to(myobject, x, y);

This will make an animation that bounces 7 each times diminishing by a factor of 1.8.

See also:
Ecore_Pos_Map
Since (EFL) :
1.1.0
Since :
2.3.1
Examples:
ecore_animator_example.c.
double ecore_animator_pos_map_n ( double  pos,
Ecore_Pos_Map  map,
int  v_size,
double *  v 
)

Maps an input position from 0.0 to 1.0 along a timeline to a position in a different curve.

Parameters:
posThe input position to map
mapThe mapping to use
v_sizeThe size of the v array.
vAn array with the double parameters to be used by the mapping. NULL if not used.
Returns:
The mapped value

Takes an input position (0.0 to 1.0) and maps to a new position (normally between 0.0 and 1.0, but it may go above/below 0.0 or 1.0 to show that it has "overshot" the mark) using some interpolation (mapping) algorithm.

This function useful to create non-linear animations. It offers a variety of possible animation curves to be used:

  • ECORE_POS_MAP_LINEAR - Linear, returns pos
  • ECORE_POS_MAP_ACCELERATE - Start slow then speed up
  • ECORE_POS_MAP_DECELERATE - Start fast then slow down
  • ECORE_POS_MAP_SINUSOIDAL - Start slow, speed up then slow down at end
  • ECORE_POS_MAP_ACCELERATE_FACTOR - Start slow then speed up, v[0] being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_ACCELERATE, 2.0 being much more pronounced accelerate (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_DECELERATE_FACTOR - Start fast then slow down, v[0] being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_DECELERATE, 2.0 being much more pronounced decelerate (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_SINUSOIDAL_FACTOR - Start slow, speed up then slow down at end, v[0] being a power factor, 0.0 being linear, 1.0 being ECORE_POS_MAP_SINUSOIDAL, 2.0 being much more pronounced sinusoidal (squared), 3.0 being cubed, etc.
  • ECORE_POS_MAP_DIVISOR_INTERP - Start at gradient * v[0], interpolated via power of v2 curve
  • ECORE_POS_MAP_BOUNCE - Start at 0.0 then "drop" like a ball bouncing to the ground at 1.0, and bounce v2 times, with decay factor of v[0]
  • ECORE_POS_MAP_SPRING - Start at 0.0 then "wobble" like a spring rest position 1.0, and wobble v2 times, with decay factor of v[0]
  • ECORE_POS_MAP_CUBIC_BEZIER - Use an interpolated cubic-bezier curve adjusted with parameters from v[0] to v[3].
    Note:
    When not listed v has no effect.
    ecore-pos-map.png

One way to use this would be:

 double pos; // input position in a timeline from 0.0 to 1.0
 double out; // output position after mapping
 int x1, y1, x2, y2; // x1 & y1 are start position, x2 & y2 are end position
 int x, y; // x & y are the calculated position
 double v[2] = {1.8, 7};

 out = ecore_animator_pos_map(pos, ECORE_POS_MAP_BOUNCE, 2, v);
 x = (x1 * out) + (x2 * (1.0 - out));
 y = (y1 * out) + (y2 * (1.0 - out));
 move_my_object_to(myobject, x, y);

This will make an animation that bounces 7 each times diminishing by a factor of 1.8.

See also:
Ecore_Pos_Map
Since :
3.0f(2.3.1)
Ecore_Animator_Source ecore_animator_source_get ( void  )

Gets the animator source currently set.

Returns:
The current animator source

This gets the current animator source.

See also:
ecore_animator_source_set()
Since :
2.3.1
void ecore_animator_source_set ( Ecore_Animator_Source  source)

Sets the source of animator ticks for the mainloop.

Parameters:
sourceThe source of animator ticks to use

This sets the source of animator ticks. When an animator is active the mainloop will "tick" over frame by frame calling all animators that are registered until none are. The mainloop will tick at a given rate based on the animator source. The default source is the system clock timer source - ECORE_ANIMATOR_SOURCE_TIMER. This source uses the system clock to tick over every N seconds (specified by ecore_animator_frametime_set(), with the default being 1/60th of a second unless set otherwise). You can set a custom tick source by setting the source to ECORE_ANIMATOR_SOURCE_CUSTOM and then drive it yourself based on some input tick source (like another application via ipc, some vertical blanking interrupt, and etc.) using ecore_animator_custom_source_tick_begin_callback_set() and ecore_animator_custom_source_tick_end_callback_set() to set the functions that will be called to start and stop the ticking source, which when it gets a "tick" should call ecore_animator_custom_tick() to make the "tick" over 1 frame.

See also:
ecore_animator_source_get()
Since :
2.3.1
void ecore_animator_thaw ( Ecore_Animator *  animator)

Restores execution of the specified animator.

Parameters:
animatorThe animator to delete

The specified animator will be put back in the set of animators that are executed during main loop.

Since :
2.3.1
Examples:
ecore_animator_example.c.
Ecore_Animator* ecore_animator_timeline_add ( double  runtime,
Ecore_Timeline_Cb  func,
const void *  data 
)

Adds an animator that runs for a limited time.

Parameters:
runtimeThe time to run in seconds
funcThe function to call when it ticks off
dataThe data to pass to the function
Returns:
A handle to the new animator

This function is just like ecore_animator_add() except the animator only runs for a limited time specified in seconds by runtime. Once the runtime the animator has elapsed (animator finished) it will automatically be deleted. The callback function func can return ECORE_CALLBACK_RENEW to keep the animator running or ECORE_CALLBACK_CANCEL or stop it and have it be deleted automatically at any time. Just like timers, the start of The animation is "now" (when the loop woke up - gettable with ecore_loop_time_get()).

The func will ALSO be passed a position parameter that will be in value from 0.0 to 1.0 to indicate where along the timeline (0.0 start, 1.0 end) the animator run is at. If the callback wishes not to have a linear transition it can "map" this value to one of several curves and mappings via ecore_animator_pos_map().

See also:
ecore_animator_add()
ecore_animator_pos_map()
Note:
The default frametime value is 1/30th of a second.
The first position parameter passed to the callback will never be 0.
Since (EFL) :
1.1.0
Since :
2.3.1
Examples:
ecore_animator_example.c.