GdkPixbuf.PixbufAnimation¶

Subclasses:: GdkPixbuf.PixbufNonAnim, GdkPixbuf.PixbufSimpleAnim

Methods¶

Inherited:: GObject.Object (37)
Structs:: GObject.ObjectClass (5)

class	`new_from_file` (filename)
class	`new_from_resource` (resource_path)
class	`new_from_stream` (stream, cancellable)
class	`new_from_stream_async` (stream, cancellable, callback, *user_data)
class	`new_from_stream_finish` (async_result)
	`get_height` ()
	`get_iter` (start_time)
	`get_static_image` ()
	`get_width` ()
	`is_static_image` ()

Virtual Methods¶

Inherited:: GObject.Object (7)

	`do_get_iter` (start_time)
	`do_get_size` (width, height)
	`do_get_static_image` ()
	`do_is_static_image` ()

Properties¶

None

Signals¶

Inherited:: GObject.Object (1)

Fields¶

Inherited:: GObject.Object (1)

Name	Type	Access	Description
parent_instance	`GObject.Object`	r

Class Details¶

class GdkPixbuf.PixbufAnimation(**kwargs)¶

Bases:: GObject.Object
Abstract:: No
Structure:: GdkPixbuf.PixbufAnimationClass

An opaque object representing an animation.

The GdkPixBuf library provides a simple mechanism to load and represent animations. An animation is conceptually a series of frames to be displayed over time.

The animation may not be represented as a series of frames internally; for example, it may be stored as a sprite and instructions for moving the sprite around a background.

To display an animation you don’t need to understand its representation, however; you just ask GdkPixbuf what should be displayed at a given point in time.

classmethod new_from_file(filename)¶

Parameters:: filename (str) – Name of file to load, in the GLib file name encoding
Raises:: GLib.Error
Returns:: A newly-created animation
Return type:: GdkPixbuf.PixbufAnimation or None

Creates a new animation by loading it from a file.

The file format is detected automatically.

If the file’s format does not support multi-frame images, then an animation with a single frame will be created.

Possible errors are in the GDK_PIXBUF_ERROR and G_FILE_ERROR domains.

classmethod new_from_resource(resource_path)¶

Parameters:: resource_path (str) – the path of the resource file
Raises:: GLib.Error
Returns:: A newly-created animation
Return type:: GdkPixbuf.PixbufAnimation or None

Creates a new pixbuf animation by loading an image from an resource.

The file format is detected automatically. If NULL is returned, then error will be set.

New in version 2.28.

classmethod new_from_stream(stream, cancellable)¶

Parameters:

stream (Gio.InputStream) – a GInputStream to load the pixbuf from
cancellable (Gio.Cancellable or None) – optional GCancellable object

Raises:

GLib.Error

Returns:

A newly-created animation

Return type:

GdkPixbuf.PixbufAnimation or None

Creates a new animation by loading it from an input stream.

The file format is detected automatically.

If NULL is returned, then error will be set.

The cancellable can be used to abort the operation from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. Other possible errors are in the GDK_PIXBUF_ERROR and G_IO_ERROR domains.

The stream is not closed.

New in version 2.28.

classmethod new_from_stream_async(stream, cancellable, callback, *user_data)¶

Parameters:

stream (Gio.InputStream) – a Gio.InputStream from which to load the animation
cancellable (Gio.Cancellable or None) – optional Gio.Cancellable object
callback (Gio.AsyncReadyCallback or None) – a GAsyncReadyCallback to call when the pixbuf is loaded
user_data (object or None) – the data to pass to the callback function

Creates a new animation by asynchronously loading an image from an input stream.

For more details see GdkPixbuf.Pixbuf.new_from_stream(), which is the synchronous version of this function.

When the operation is finished, callback will be called in the main thread. You can then call GdkPixbuf.PixbufAnimation.new_from_stream_finish() to get the result of the operation.

New in version 2.28.

classmethod new_from_stream_finish(async_result)¶

Parameters:: async_result (Gio.AsyncResult) – a Gio.AsyncResult
Raises:: GLib.Error
Returns:: the newly created animation
Return type:: GdkPixbuf.PixbufAnimation or None

Finishes an asynchronous pixbuf animation creation operation started with [func`GdkPixbuf`.PixbufAnimation.new_from_stream_async].

New in version 2.28.

get_height()¶

Returns:: Height of the bounding box of the animation.
Return type:: int

Queries the height of the bounding box of a pixbuf animation.

get_iter(start_time)¶

Parameters:: start_time (GLib.TimeVal or None) – time when the animation starts playing
Returns:: an iterator to move over the animation
Return type:: GdkPixbuf.PixbufAnimationIter

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 GLib.get_current_time(), and marks the beginning of animation playback. After creating an iterator, you should immediately display the pixbuf returned by GdkPixbuf.PixbufAnimationIter.get_pixbuf(). Then, you should install a timeout (with GLib.timeout_add()) or by some other mechanism ensure that you’ll update the image after GdkPixbuf.PixbufAnimationIter.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 GLib.get_current_time() will be used automatically.

To update the image (i.e. possibly change the result of GdkPixbuf.PixbufAnimationIter.get_pixbuf() to a new frame of the animation), call GdkPixbuf.PixbufAnimationIter.advance().

If you’re using GdkPixbuf.PixbufLoader, in addition to updating the image after the delay time, you should also update it whenever you receive the area_updated signal and GdkPixbuf.PixbufAnimationIter.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”.

get_static_image()¶

Returns:: unanimated image representing the animation
Return type:: GdkPixbuf.Pixbuf

Retrieves a static image for the animation.

If an animation is really just a plain image (has only one frame), this function returns that image.

If the animation is an animation, this function returns a reasonable image to use as a static unanimated image, which might be the first frame, or something more sophisticated depending on the file format.

If an animation hasn’t loaded any frames yet, this function will return NULL.

get_width()¶

Returns:: Width of the bounding box of the animation.
Return type:: int

Queries the width of the bounding box of a pixbuf animation.

is_static_image()¶

Returns:: TRUE if the “animation” was really just an image
Return type:: bool

Checks whether the animation is a static image.

If you load a file with GdkPixbuf.PixbufAnimation.new_from_file() and it turns out to be a plain, unanimated image, then this function will return TRUE. Use GdkPixbuf.PixbufAnimation.get_static_image() to retrieve the image.

do_get_iter(start_time) virtual¶

Parameters:: start_time (GLib.TimeVal or None) – time when the animation starts playing
Returns:: an iterator to move over the animation
Return type:: GdkPixbuf.PixbufAnimationIter

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 GLib.get_current_time(), and marks the beginning of animation playback. After creating an iterator, you should immediately display the pixbuf returned by GdkPixbuf.PixbufAnimationIter.get_pixbuf(). Then, you should install a timeout (with GLib.timeout_add()) or by some other mechanism ensure that you’ll update the image after GdkPixbuf.PixbufAnimationIter.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 GLib.get_current_time() will be used automatically.

To update the image (i.e. possibly change the result of GdkPixbuf.PixbufAnimationIter.get_pixbuf() to a new frame of the animation), call GdkPixbuf.PixbufAnimationIter.advance().

If you’re using GdkPixbuf.PixbufLoader, in addition to updating the image after the delay time, you should also update it whenever you receive the area_updated signal and GdkPixbuf.PixbufAnimationIter.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”.

do_get_size(width, height) virtual¶

Parameters:

width (int) –
height (int) –

do_get_static_image() virtual¶

Returns:: unanimated image representing the animation
Return type:: GdkPixbuf.Pixbuf

Retrieves a static image for the animation.

If an animation is really just a plain image (has only one frame), this function returns that image.

If the animation is an animation, this function returns a reasonable image to use as a static unanimated image, which might be the first frame, or something more sophisticated depending on the file format.

If an animation hasn’t loaded any frames yet, this function will return NULL.

do_is_static_image() virtual¶

Returns:: TRUE if the “animation” was really just an image
Return type:: bool

Checks whether the animation is a static image.

If you load a file with GdkPixbuf.PixbufAnimation.new_from_file() and it turns out to be a plain, unanimated image, then this function will return TRUE. Use GdkPixbuf.PixbufAnimation.get_static_image() to retrieve the image.