Virtual Method
GdkPixbufPixbufAnimationget_iter
Declaration [src]
GdkPixbufAnimationIter*
get_iter (
GdkPixbufAnimation* animation,
const GTimeVal* start_time
)
Description [src]
Get an iterator for displaying an animation.
The iterator provides the frames that should be displayed at a given time.
start_time would normally come from g_get_current_time(), and marks
the beginning of animation playback. After creating an iterator, you
should immediately display the pixbuf returned by
gdk_pixbuf_animation_iter_get_pixbuf(). Then, you should install
a timeout (with g_timeout_add()) or by some other mechanism ensure
that you’ll update the image after
gdk_pixbuf_animation_iter_get_delay_time() milliseconds. Each time
the image is updated, you should reinstall the timeout with the new,
possibly-changed delay time.
As a shortcut, if start_time is NULL, the result of
g_get_current_time() will be used automatically.
To update the image (i.e. possibly change the result of
gdk_pixbuf_animation_iter_get_pixbuf() to a new frame of the animation),
call gdk_pixbuf_animation_iter_advance().
If you’re using GdkPixbufLoader, in addition to updating the image
after the delay time, you should also update it whenever you
receive the area_updated signal and
gdk_pixbuf_animation_iter_on_currently_loading_frame() returns
TRUE. In this case, the frame currently being fed into the loader
has received new data, so needs to be refreshed. The delay time for
a frame may also be modified after an area_updated signal, for
example if the delay time for a frame is encoded in the data after
the frame itself. So your timeout should be reinstalled after any
area_updated signal.
A delay time of -1 is possible, indicating “infinite”.
Parameters
start_time-
Type:
GTimeValTime when the animation starts playing.
The argument can be NULL.The data is owned by the caller of the method.
Return value
Type: GdkPixbufAnimationIter
An iterator to move over the animation.
| The caller of the method takes ownership of the returned data, and is responsible for freeing it. |