Adds a selection bounded by the specified offsets.
the starting character offset of the selected region
the offset of the first character after the selected region.
Creates a binding between source_property on source and target_property
on target.
Whenever the source_property is changed the target_property is
updated using the same value. For instance:
g_object_bind_property (action, "active", widget, "sensitive", 0);
Will result in the "sensitive" property of the widget #GObject instance to be updated with the same value of the "active" property of the action #GObject instance.
If flags contains %G_BINDING_BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well.
The binding will automatically be removed when either the source or the
target instances are finalized. To remove the binding without affecting the
source and the target you can just call g_object_unref() on the returned
#GBinding instance.
Removing the binding by calling g_object_unref() on it must only be done if
the binding, source and target are only used from a single thread and it
is clear that both source and target outlive the binding. Especially it
is not safe to rely on this if the binding, source or target can be
finalized from different threads. Keep another reference to the binding and
use g_binding_unbind() instead to be on the safe side.
A #GObject can have multiple bindings.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
This function is the language bindings friendly version of g_object_bind_property_full(), using #GClosures instead of function pointers.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
a #GClosure wrapping the transformation function from the source to the target, or %NULL to use the default
a #GClosure wrapping the transformation function from the target to the source, or %NULL to use the default
This function is intended for #GObject implementations to re-enforce a [floating][floating-ref] object reference. Doing this is seldom required: all #GInitiallyUnowneds are created with a floating reference which usually just needs to be sunken by calling g_object_ref_sink().
Increases the freeze count on object. If the freeze count is
non-zero, the emission of "notify" signals on object is
stopped. The signals are queued until the freeze count is decreased
to zero. Duplicate notifications are squashed so that at most one
#GObject::notify signal is emitted for each property modified while the
object is frozen.
This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.
Get the ranges of text in the specified bounding box.
An AtkTextRectangle giving the dimensions of the bounding box.
Specify whether coordinates are relative to the screen or widget window.
Specify the horizontal clip type.
Specify the vertical clip type.
Gets the offset of the position of the caret (cursor).
Gets the specified text.
a character offset within text
Gets the character count.
If the extent can not be obtained (e.g. missing support), all of x, y, width, height are set to -1.
Get the bounding box containing the glyph representing the character at a particular text offset.
The offset of the text character for which bounding information is required.
specify whether coordinates are relative to the screen or widget window
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
Creates an #AtkAttributeSet which consists of the default values of attributes for the text. See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.
Gets the number of selected regions.
Gets the offset of the character located at coordinates x and y. x and y
are interpreted as being relative to the screen or this widget's window
depending on coords.
screen x-position of character
screen y-position of character
specify whether coordinates are relative to the screen or widget window
Gets a property of an object.
The value can be:
In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling g_value_unset().
Note that g_object_get_property() is really intended for language bindings, g_object_get() is much more convenient for C programming.
the name of the property to get
return location for the property value
This function gets back user data pointers stored via g_object_set_qdata().
A #GQuark, naming the user data pointer
Get the bounding box for text within the specified range.
If the extents can not be obtained (e.g. or missing support), the rectangle fields are set to -1.
The offset of the first text character for which boundary information is required.
The offset of the text character after the last character for which boundary information is required.
Specify whether coordinates are relative to the screen or widget window.
Creates an #AtkAttributeSet which consists of the attributes explicitly
set at the position offset in the text. start_offset and end_offset are
set to the start and end of the range around offset where the attributes are
invariant. Note that end_offset is the offset of the first character
after the range. See the enum AtkTextAttribute for types of text
attributes that can be returned. Note that other attributes may also be
returned.
the character offset at which to get the attributes, -1 means the offset of the character to be inserted at the caret location.
Gets the text from the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
Gets a portion of the text exposed through an #AtkText according to a given offset
and a specific granularity, along with the start and end offsets defining the
boundaries of such a portion of text.
If granularity is ATK_TEXT_GRANULARITY_CHAR the character at the
offset is returned.
If granularity is ATK_TEXT_GRANULARITY_WORD the returned string
is from the word start at or before the offset to the word start after
the offset.
The returned string will contain the word at the offset if the offset is inside a word and will contain the word before the offset if the offset is not inside a word.
If granularity is ATK_TEXT_GRANULARITY_SENTENCE the returned string
is from the sentence start at or before the offset to the sentence
start after the offset.
The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence before the offset if the offset is not inside a sentence.
If granularity is ATK_TEXT_GRANULARITY_LINE the returned string
is from the line start at or before the offset to the line
start after the offset.
If granularity is ATK_TEXT_GRANULARITY_PARAGRAPH the returned string
is from the start of the paragraph at or before the offset to the start
of the following paragraph after the offset.
position
An #AtkTextGranularity
Gets the specified text.
a starting character offset within text
an ending character offset within text, or -1 for the end of the string.
Gets the specified text.
position
An #AtkTextBoundary
Gets the specified text.
If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character at the offset is returned.
If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string is from the word start at or before the offset to the word start after the offset.
The returned string will contain the word at the offset if the offset is inside a word and will contain the word before the offset if the offset is not inside a word.
If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned string is from the sentence start at or before the offset to the sentence start after the offset.
The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence before the offset if the offset is not inside a sentence.
If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned string is from the line start at or before the offset to the line start after the offset.
position
An #AtkTextBoundary
Gets the specified text.
position
An #AtkTextBoundary
Gets n_properties properties for an object.
Obtained properties will be set to values. All properties must be valid.
Warnings will be emitted and undefined behaviour may result if invalid
properties are passed in.
the names of each property to get
the values of each property to get
Checks whether object has a [floating][floating-ref] reference.
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.
Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.
the name of a property installed on the class of object.
Emits a "notify" signal for the property specified by pspec on object.
This function omits the property name lookup, hence it is faster than g_object_notify().
One way to avoid using g_object_notify() from within the class that registered the properties, and using g_object_notify_by_pspec() instead, is to store the GParamSpec used with g_object_class_install_property() inside a static array, e.g.:
enum
{
PROP_0,
PROP_FOO,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo",
0, 100,
50,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_FOO,
properties[PROP_FOO]);
}
and then notify a change on the "foo" property with:
g_object_notify_by_pspec (self, properties[PROP_FOO]);
the #GParamSpec of a property installed on the class of object.
Increase the reference count of object, and possibly remove the
[floating][floating-ref] reference, if object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.
Since GLib 2.56, the type of object will be propagated to the return type
under the same conditions as for g_object_ref().
Removes the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Makes a substring of text visible on the screen by scrolling all necessary parents.
start offset in the text
end offset in the text, or -1 for the end of the text.
specify where the object should be made visible.
Move the top-left of a substring of text to a given position of the screen
by scrolling all necessary parents.
start offset in the text
end offset in the text, or -1 for the end of the text.
specify whether coordinates are relative to the screen or to the parent object.
x-position where to scroll to
y-position where to scroll to
Sets the caret (cursor) position to the specified offset.
In the case of rich-text content, this method should either grab focus or move the sequential focus navigation starting point (if the application supports this concept) as if the user had clicked on the new caret position. Typically, this means that the target of this operation is the node containing the new caret position or one of its ancestors. In other words, after this method is called, if the user advances focus, it should move to the first focusable node following the new caret position.
Calling this method should also scroll the application viewport in a way that matches the behavior of the application's typical caret motion or tab navigation as closely as possible. This also means that if the application's caret motion or focus navigation does not trigger a scroll operation, this method should not trigger one either. If the application does not have a caret motion or focus navigation operation, this method should try to scroll the new caret position into view while minimizing unnecessary scroll motion.
the character offset of the new caret position
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
If the object already had an association with that name, the old association will be destroyed.
Internally, the key is converted to a #GQuark using g_quark_from_string().
This means a copy of key is kept permanently (even after object has been
finalized) — so it is recommended to only use a small, bounded set of values
for key in your program, to avoid the #GQuark storage growing unbounded.
name of the key
data to associate with that key
Sets a property on an object.
the name of the property to set
the value
Changes the start and end offset of the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
the new starting character offset of the selection
the new end position of (e.g. offset immediately past) the selection
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
This function gets back user data pointers stored via
g_object_set_qdata() and removes the data from object
without invoking its destroy() function (if any was
set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier, for example:
void
object_add_to_user_list (GObject *object,
const gchar *new_string)
{
// the quark, naming the object data
GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
// retrieve the old string list
GList *list = g_object_steal_qdata (object, quark_string_list);
// prepend new string
list = g_list_prepend (list, g_strdup (new_string));
// this changed 'list', so we need to set it again
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
Using g_object_get_qdata() in the above example, instead of g_object_steal_qdata() would have left the destroy function set, and thus the partial string list would have been freed upon g_object_set_qdata_full().
A #GQuark, naming the user data pointer
Reverts the effect of a previous call to
g_object_freeze_notify(). The freeze count is decreased on object
and when it reaches zero, queued "notify" signals are emitted.
Duplicate notifications for each property are squashed so that at most one #GObject::notify signal is emitted for each property, in the reverse order in which they have been queued.
It is an error to call this function when the freeze count is zero.
Decreases the reference count of object. When its reference count
drops to 0, the object is finalized (i.e. its memory is freed).
If the pointer to the #GObject may be reused in future (for example, if it is an instance variable of another object), it is recommended to clear the pointer to %NULL rather than retain a dangling pointer to a potentially invalid #GObject instance. Use g_clear_object() for this.
Adds a selection bounded by the specified offsets.
the starting character offset of the selected region
the offset of the first character after the selected region.
Get the ranges of text in the specified bounding box.
An AtkTextRectangle giving the dimensions of the bounding box.
Specify whether coordinates are relative to the screen or widget window.
Specify the horizontal clip type.
Specify the vertical clip type.
Gets the offset of the position of the caret (cursor).
Gets the specified text.
a character offset within text
Gets the character count.
If the extent can not be obtained (e.g. missing support), all of x, y, width, height are set to -1.
Get the bounding box containing the glyph representing the character at a particular text offset.
The offset of the text character for which bounding information is required.
specify whether coordinates are relative to the screen or widget window
Creates an #AtkAttributeSet which consists of the default values of attributes for the text. See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.
Gets the number of selected regions.
Gets the offset of the character located at coordinates x and y. x and y
are interpreted as being relative to the screen or this widget's window
depending on coords.
screen x-position of character
screen y-position of character
specify whether coordinates are relative to the screen or widget window
Get the bounding box for text within the specified range.
If the extents can not be obtained (e.g. or missing support), the rectangle fields are set to -1.
The offset of the first text character for which boundary information is required.
The offset of the text character after the last character for which boundary information is required.
Specify whether coordinates are relative to the screen or widget window.
Creates an #AtkAttributeSet which consists of the attributes explicitly
set at the position offset in the text. start_offset and end_offset are
set to the start and end of the range around offset where the attributes are
invariant. Note that end_offset is the offset of the first character
after the range. See the enum AtkTextAttribute for types of text
attributes that can be returned. Note that other attributes may also be
returned.
the character offset at which to get the attributes, -1 means the offset of the character to be inserted at the caret location.
Gets the text from the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
Gets a portion of the text exposed through an #AtkText according to a given offset
and a specific granularity, along with the start and end offsets defining the
boundaries of such a portion of text.
If granularity is ATK_TEXT_GRANULARITY_CHAR the character at the
offset is returned.
If granularity is ATK_TEXT_GRANULARITY_WORD the returned string
is from the word start at or before the offset to the word start after
the offset.
The returned string will contain the word at the offset if the offset is inside a word and will contain the word before the offset if the offset is not inside a word.
If granularity is ATK_TEXT_GRANULARITY_SENTENCE the returned string
is from the sentence start at or before the offset to the sentence
start after the offset.
The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence before the offset if the offset is not inside a sentence.
If granularity is ATK_TEXT_GRANULARITY_LINE the returned string
is from the line start at or before the offset to the line
start after the offset.
If granularity is ATK_TEXT_GRANULARITY_PARAGRAPH the returned string
is from the start of the paragraph at or before the offset to the start
of the following paragraph after the offset.
position
An #AtkTextGranularity
Gets the specified text.
a starting character offset within text
an ending character offset within text, or -1 for the end of the string.
Gets the specified text.
position
An #AtkTextBoundary
Gets the specified text.
If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character at the offset is returned.
If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string is from the word start at or before the offset to the word start after the offset.
The returned string will contain the word at the offset if the offset is inside a word and will contain the word before the offset if the offset is not inside a word.
If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned string is from the sentence start at or before the offset to the sentence start after the offset.
The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence before the offset if the offset is not inside a sentence.
If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned string is from the line start at or before the offset to the line start after the offset.
position
An #AtkTextBoundary
Gets the specified text.
position
An #AtkTextBoundary
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.
Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.
Removes the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
Makes a substring of text visible on the screen by scrolling all necessary parents.
start offset in the text
end offset in the text, or -1 for the end of the text.
specify where the object should be made visible.
Move the top-left of a substring of text to a given position of the screen
by scrolling all necessary parents.
start offset in the text
end offset in the text, or -1 for the end of the text.
specify whether coordinates are relative to the screen or to the parent object.
x-position where to scroll to
y-position where to scroll to
Sets the caret (cursor) position to the specified offset.
In the case of rich-text content, this method should either grab focus or move the sequential focus navigation starting point (if the application supports this concept) as if the user had clicked on the new caret position. Typically, this means that the target of this operation is the node containing the new caret position or one of its ancestors. In other words, after this method is called, if the user advances focus, it should move to the first focusable node following the new caret position.
Calling this method should also scroll the application viewport in a way that matches the behavior of the application's typical caret motion or tab navigation as closely as possible. This also means that if the application's caret motion or focus navigation does not trigger a scroll operation, this method should not trigger one either. If the application does not have a caret motion or focus navigation operation, this method should try to scroll the new caret position into view while minimizing unnecessary scroll motion.
the character offset of the new caret position
Changes the start and end offset of the specified selection.
The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
the new starting character offset of the selection
the new end position of (e.g. offset immediately past) the selection
This function essentially limits the life time of the closure to
the life time of the object. That is, when the object is finalized,
the closure is invalidated by calling g_closure_invalidate() on
it, in order to prevent invocations of the closure with a finalized
(nonexisting) object. Also, g_object_ref() and g_object_unref() are
added as marshal guards to the closure, to ensure that an extra
reference count is held on object during invocation of the
closure. Usually, this function will be called on closures that
use this object as closure data.
#GClosure to watch
Find the #GParamSpec with the given name for an
interface. Generally, the interface vtable passed in as g_iface
will be the default vtable from g_type_default_interface_ref(), or,
if you know the interface has already been loaded,
g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
name of a property to look up.
Add a property to an interface; this is only useful for interfaces that are added to GObject-derived types. Adding a property to an interface forces all objects classes with that interface to have a compatible property. The compatible property could be a newly created #GParamSpec, but normally g_object_class_override_property() will be used so that the object class only needs to provide an implementation and inherits the property description, default value, bounds, and so forth from the interface property.
This function is meant to be called from the interface's default
vtable initialization function (the class_init member of
#GTypeInfo.) It must not be called after after class_init has
been called for any object types implementing this interface.
If pspec is a floating reference, it will be consumed.
any interface vtable for the interface, or the default vtable for the interface.
the #GParamSpec for the new property
Lists the properties of an interface.Generally, the interface
vtable passed in as g_iface will be the default vtable from
g_type_default_interface_ref(), or, if you know the interface has
already been loaded, g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
Creates a new instance of a #GObject subtype and sets its properties.
Construction parameters (see %G_PARAM_CONSTRUCT, %G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.
the type id of the #GObject subtype to instantiate
an array of #GParameter
#AtkText should be implemented by #AtkObjects on behalf of widgets that have text content which is either attributed or otherwise non-trivial. #AtkObjects whose text content is simple, unattributed, and very brief may expose that content via #atk_object_get_name instead; however if the text is editable, multi-line, typically longer than three or four words, attributed, selectable, or if the object already uses the 'name' ATK property for other information, the #AtkText interface should be used to expose the text content. In the case of editable text content, #AtkEditableText (a subtype of the #AtkText interface) should be implemented instead.
#AtkText provides not only traversal facilities and change notification for text content, but also caret tracking and glyph bounding box calculations. Note that the text strings are exposed as UTF-8, and are therefore potentially multi-byte, and caret-to-byte offset mapping makes no assumptions about the character length; also bounding box glyph-to-offset mapping may be complex for languages which use ligatures.