glibmm
2.34.0
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Stream seeking interface. More...
#include <giomm/seekable.h>
Public Member Functions | |
virtual | ~Seekable () |
GSeekable* | gobj () |
Provides access to the underlying C GObject. | |
const GSeekable* | gobj () const |
Provides access to the underlying C GObject. | |
goffset | tell () const |
Tells the current position within the stream. | |
bool | can_seek () const |
Tests if the stream supports the SeekableIface. | |
bool | seek (goffset offset, Glib::SeekType type, const Glib::RefPtr< Cancellable >& cancellable) |
Seeks in the stream by the given offset, modified by type. | |
bool | seek (goffset offset, Glib::SeekType type) |
A seek() convenience overload. | |
bool | can_truncate () const |
Tests if the stream can be truncated. | |
bool | truncate (goffset offset, const Glib::RefPtr< Cancellable >& cancellable) |
Truncates a stream with a given #offset. | |
bool | truncate (goffset offset) |
A truncate() convenience overload. | |
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Interface (const Glib::Interface_Class& interface_class) | |
Called by constructors of derived classes. | |
Interface (GObject* castitem) | |
Called by constructors of derived classes. | |
virtual | ~Interface () |
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void | set_property_value (const Glib::ustring& property_name, const Glib::ValueBase& value) |
You probably want to use a specific property_*() accessor method instead. | |
void | get_property_value (const Glib::ustring& property_name, Glib::ValueBase& value) const |
You probably want to use a specific property_*() accessor method instead. | |
template<class PropertyType > | |
void | set_property (const Glib::ustring& property_name, const PropertyType& value) |
You probably want to use a specific property_*() accessor method instead. | |
template<class PropertyType > | |
void | get_property (const Glib::ustring& property_name, PropertyType& value) const |
You probably want to use a specific property_*() accessor method instead. | |
void | connect_property_changed (const Glib::ustring& property_name, const sigc::slot< void >& slot) |
You can use the signal_changed() signal of the property proxy instead, but this is necessary when using the reduced API. | |
sigc::connection | connect_property_changed_with_return (const Glib::ustring& property_name, const sigc::slot< void >& slot) |
You can use the signal_changed() signal of the property proxy instead, but this is necessary when using the reduced API. | |
void | freeze_notify () |
Increases the freeze count on object. | |
void | thaw_notify () |
Reverts the effect of a previous call to freeze_notify(). | |
virtual void | reference () const |
Increment the reference count for this object. | |
virtual void | unreference () const |
Decrement the reference count for this object. | |
GObject* | gobj_copy () const |
Give a ref-ed copy to someone. Use for direct struct access. | |
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trackable (const trackable &src) | |
trackable & | operator= (const trackable &src) |
void | add_destroy_notify_callback (void *data, func_destroy_notify func) const |
void | remove_destroy_notify_callback (void *data) const |
void | notify_callbacks () |
Static Public Member Functions | |
static void | add_interface (GType gtype_implementer) |
static GType | get_type () |
Get the GType for this class, for use with the underlying GObject type system. |
Protected Member Functions | |
Seekable () | |
You should derive from this class to use it. |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr< Gio::Seekable > | wrap (GSeekable* object, bool take_copy=false) |
A Glib::wrap() method for this object. |
Stream seeking interface.
Seekable is implemented by streams (implementations of InputStream or OutputStream) that support seeking. To find the position of a stream, use tell(). To find out if a stream supports seeking, use can_seek(). To position a stream, use seek(). To find out if a stream supports truncating, use can_truncate(). To truncate a stream, use truncate().
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protected |
You should derive from this class to use it.
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virtual |
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static |
bool Gio::Seekable::can_seek | ( | ) | const |
Tests if the stream supports the SeekableIface.
true
if seekable can be seeked. false
otherwise. bool Gio::Seekable::can_truncate | ( | ) | const |
Tests if the stream can be truncated.
true
if the stream can be truncated, false
otherwise.
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static |
Get the GType for this class, for use with the underlying GObject type system.
Reimplemented in Gio::FileOutputStream, Gio::FileInputStream, Gio::FileIOStream, Gio::MemoryOutputStream, and Gio::MemoryInputStream.
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inline |
Provides access to the underlying C GObject.
Reimplemented from Glib::Interface.
Reimplemented in Gio::FileOutputStream, Gio::FileInputStream, Gio::FileIOStream, Gio::MemoryOutputStream, and Gio::MemoryInputStream.
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inline |
Provides access to the underlying C GObject.
Reimplemented from Glib::Interface.
Reimplemented in Gio::FileOutputStream, Gio::FileInputStream, Gio::FileIOStream, Gio::MemoryOutputStream, and Gio::MemoryInputStream.
bool Gio::Seekable::seek | ( | goffset | offset, |
Glib::SeekType | type, | ||
const Glib::RefPtr< Cancellable >& | cancellable | ||
) |
Seeks in the stream by the given offset, modified by type.
The operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, a Gio::Error will be thrown with CANCELLED.
offset | A #goffset. |
type | A SeekType. |
cancellable | Cancellable object. |
true
if successful. If an error has occurred, this function will return false
and set error appropriately if present. bool Gio::Seekable::seek | ( | goffset | offset, |
Glib::SeekType | type | ||
) |
A seek() convenience overload.
goffset Gio::Seekable::tell | ( | ) | const |
Tells the current position within the stream.
bool Gio::Seekable::truncate | ( | goffset | offset, |
const Glib::RefPtr< Cancellable >& | cancellable | ||
) |
Truncates a stream with a given #offset.
The operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, a Gio::Error will be thrown with CANCELLED. If an operation was partially finished when the operation was cancelled the partial result will be returned, without an error.
offset | A #goffset. |
cancellable | Cancellable object. |
true
if successful. If an error has occurred, this function will return false
and set error appropriately if present. bool Gio::Seekable::truncate | ( | goffset | offset | ) |
A truncate() convenience overload.
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related |
A Glib::wrap() method for this object.
object | The C instance. |
take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref. |