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keyframe-transition: Add direct accessors for key frames

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This should allow modifying key frame details without requiring a full
reset of the KeyframeTransition instance.
This commit is contained in:
Emmanuele Bassi 2012-04-11 17:47:53 +01:00
parent c500fc1844
commit 024f6d40d2
4 changed files with 125 additions and 0 deletions
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102
clutter/clutter-keyframe-transition.c
View File

@ -626,3 +626,105 @@ clutter_keyframe_transition_clear (ClutterKeyframeTransition *transition)
transition->priv->frames = NULL;
}
}
/**
* clutter_keyframe_transition_get_n_key_frames:
* @transition: a #ClutterKeyframeTransition
*
* Retrieves the number of key frames inside @transition.
*
* Return value: the number of key frames
*
* Since: 1.12
*/
guint
clutter_keyframe_transition_get_n_key_frames (ClutterKeyframeTransition *transition)
{
g_return_val_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition), 0);
if (transition->priv->frames == NULL)
return 0;
return transition->priv->frames->len - 1;
}
/**
* clutter_keyframe_transition_set_key_frame:
* @transition: a #ClutterKeyframeTransition
* @index_: the index of the key frame
* @key: the key of the key frame
* @mode: the easing mode of the key frame
* @value: a #GValue containing the value of the key frame
*
* Sets the details of the key frame at @index_ inside @transition.
*
* The @transition must already have a key frame at @index_, and @index_
* must be smaller than the number of key frames inside @transition.
*
* Since: 1.12
*/
void
clutter_keyframe_transition_set_key_frame (ClutterKeyframeTransition *transition,
guint index_,
double key,
ClutterAnimationMode mode,
const GValue *value)
{
ClutterKeyframeTransitionPrivate *priv;
KeyFrame *frame;
g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
priv = transition->priv;
g_return_if_fail (priv->frames != NULL);
g_return_if_fail (index_ < priv->frames->len - 1);
frame = &g_array_index (priv->frames, KeyFrame, index_);
frame->key = key;
frame->mode = mode;
clutter_interval_set_final_value (frame->interval, value);
}
/**
* clutter_keyframe_transition_get_key_frame:
* @transition: a #ClutterKeyframeTransition
* @index_: the index of the key frame
* @key: (out) (allow-none): return location for the key, or %NULL
* @mode: (out) (allow-none): return location for the easing mode, or %NULL
* @value: (out caller-allocates): a #GValue initialized with the type of
* the values
*
* Retrieves the details of the key frame at @index_ inside @transition.
*
* The @transition must already have key frames set, and @index_ must be
* smaller than the number of key frames.
*
* Since: 1.12
*/
void
clutter_keyframe_transition_get_key_frame (ClutterKeyframeTransition *transition,
guint index_,
double *key,
ClutterAnimationMode *mode,
GValue *value)
{
ClutterKeyframeTransitionPrivate *priv;
const KeyFrame *frame;
g_return_if_fail (CLUTTER_IS_KEYFRAME_TRANSITION (transition));
priv = transition->priv;
g_return_if_fail (priv->frames != NULL);
g_return_if_fail (index_ < priv->frames->len - 1);
frame = &g_array_index (priv->frames, KeyFrame, index_);
if (key != NULL)
*key = frame->key;
if (mode != NULL)
*mode = frame->mode;
if (value != NULL)
clutter_interval_get_final_value (frame->interval, value);
}

15
clutter/clutter-keyframe-transition.h
View File

@ -97,6 +97,21 @@ void clutter_keyframe_transition_set (Clutter
guint n_key_frames,
...);
CLUTTER_AVAILABLE_IN_1_12
void clutter_keyframe_transition_set_key_frame (ClutterKeyframeTransition *transition,
guint index_,
double key,
ClutterAnimationMode mode,
const GValue *value);
CLUTTER_AVAILABLE_IN_1_12
void clutter_keyframe_transition_get_key_frame (ClutterKeyframeTransition *transition,
guint index_,
double *key,
ClutterAnimationMode *mode,
GValue *value);
CLUTTER_AVAILABLE_IN_1_12
guint clutter_keyframe_transition_get_n_key_frames (ClutterKeyframeTransition *transition);
CLUTTER_AVAILABLE_IN_1_12
void clutter_keyframe_transition_clear (ClutterKeyframeTransition *transition);

3
clutter/clutter.symbols
View File

@ -800,9 +800,12 @@ clutter_input_device_ungrab
clutter_input_device_update_from_event
clutter_input_mode_get_type
clutter_keyframe_transition_clear
clutter_keyframe_transition_get_key_frame
clutter_keyframe_transition_get_n_key_frames
clutter_keyframe_transition_get_type
clutter_keyframe_transition_new
clutter_keyframe_transition_set_key_frames
clutter_keyframe_transition_set_key_frame
clutter_keyframe_transition_set_modes
clutter_keyframe_transition_set_values
clutter_keyframe_transition_set

5
doc/reference/clutter/clutter-sections.txt
View File

@ -3231,6 +3231,11 @@ clutter_keyframe_transition_set
clutter_keyframe_transition_set_key_frames
clutter_keyframe_transition_set_modes
clutter_keyframe_transition_set_values
<SUBSECTION>
clutter_keyframe_transition_get_n_key_frames
clutter_keyframe_transition_set_key_frame
clutter_keyframe_transition_get_key_frame
clutter_keyframe_transition_clear
<SECTION Standard>
CLUTTER_TYPE_KEYFRAME_TRANSITION