GtkBuildable

GtkBuildable — Interface for objects that can be built by GtkBuilder

Synopsis

#include <gtk/gtk.h>

                    GtkBuildable;
struct              GtkBuildableIface;
void                gtk_buildable_set_name              (GtkBuildable *buildable,
                                                         const gchar *name);
const gchar *       gtk_buildable_get_name              (GtkBuildable *buildable);
void                gtk_buildable_add_child             (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *type);
void                gtk_buildable_set_buildable_property
                                                        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name,
                                                         const GValue *value);
GObject *           gtk_buildable_construct_child       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name);
gboolean            gtk_buildable_custom_tag_start      (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         GMarkupParser *parser,
                                                         gpointer *data);
void                gtk_buildable_custom_tag_end        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer *data);
void                gtk_buildable_custom_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer data);
void                gtk_buildable_parser_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder);
GObject *           gtk_buildable_get_internal_child    (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *childname);

Object Hierarchy

  GInterface
   +----GtkBuildable

Prerequisites

GtkBuildable requires GObject.

Known Implementations

GtkBuildable is implemented by GtkAboutDialog, GtkAccelLabel, GtkAction, GtkActionGroup, GtkAlignment, GtkAppChooserButton, GtkAppChooserDialog, GtkAppChooserWidget, GtkArrow, GtkAspectFrame, GtkAssistant, GtkBin, GtkBox, GtkButton, GtkButtonBox, GtkCalendar, GtkCellView, GtkCheckButton, GtkCheckMenuItem, GtkColorButton, GtkColorSelection, GtkColorSelectionDialog, GtkComboBox, GtkComboBoxText, GtkContainer, GtkDialog, GtkDrawingArea, GtkEntry, GtkEntryCompletion, GtkEventBox, GtkExpander, GtkFileChooserButton, GtkFileChooserDialog, GtkFileChooserWidget, GtkFixed, GtkFontButton, GtkFontSelection, GtkFontSelectionDialog, GtkFrame, GtkGrid, GtkHBox, GtkHButtonBox, GtkHPaned, GtkHSV, GtkHScale, GtkHScrollbar, GtkHSeparator, GtkHandleBox, GtkIconFactory, GtkIconView, GtkImage, GtkImageMenuItem, GtkInfoBar, GtkInvisible, GtkLabel, GtkLayout, GtkLinkButton, GtkListStore, GtkMenu, GtkMenuBar, GtkMenuItem, GtkMenuShell, GtkMenuToolButton, GtkMessageDialog, GtkMisc, GtkNotebook, GtkOffscreenWindow, GtkPageSetupUnixDialog, GtkPaned, GtkPlug, GtkPrintUnixDialog, GtkProgressBar, GtkRadioAction, GtkRadioButton, GtkRadioMenuItem, GtkRadioToolButton, GtkRange, GtkRecentAction, GtkRecentChooserDialog, GtkRecentChooserMenu, GtkRecentChooserWidget, GtkScale, GtkScaleButton, GtkScrollbar, GtkScrolledWindow, GtkSeparator, GtkSeparatorMenuItem, GtkSeparatorToolItem, GtkSizeGroup, GtkSocket, GtkSpinButton, GtkSpinner, GtkStatusbar, GtkSwitch, GtkTable, GtkTearoffMenuItem, GtkTextView, GtkToggleAction, GtkToggleButton, GtkToggleToolButton, GtkToolButton, GtkToolItem, GtkToolItemGroup, GtkToolPalette, GtkToolbar, GtkTreeStore, GtkTreeView, GtkTreeViewColumn, GtkUIManager, GtkVBox, GtkVButtonBox, GtkVPaned, GtkVScale, GtkVScrollbar, GtkVSeparator, GtkViewport, GtkVolumeButton, GtkWidget and GtkWindow.

Description

GtkBuildable allows objects to extend and customize thier deserialization from GtkBuilder UI descriptions. The interface includes methods for setting names and properties of objects, parsing custom tags and constructing child objects.

The GtkBuildable interface is implemented by all widgets and many of the non-widget objects that are provided by GTK+. The main user of this interface is GtkBuilder, there should be very little need for applications to call any gtk_buildable_... functions.

Note

An object only needs to implement this interface if it needs to extend the GtkBuilder format or run any extra routines at deserialization time

Details

GtkBuildable

typedef struct _GtkBuildable GtkBuildable;


struct GtkBuildableIface

struct GtkBuildableIface {
  GTypeInterface g_iface;

  /* virtual table */
  void          (* set_name)               (GtkBuildable  *buildable,
                                            const gchar   *name);
  const gchar * (* get_name)               (GtkBuildable  *buildable);
  void          (* add_child)              (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *type);
  void          (* set_buildable_property) (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *name,
					    const GValue  *value);
  GObject *     (* construct_child)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *name);
  gboolean      (* custom_tag_start)       (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    GMarkupParser *parser,
					    gpointer      *data);
  void          (* custom_tag_end)         (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    gpointer      *data);
  void          (* custom_finished)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    gpointer       data);
  void          (* parser_finished)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder);

  GObject *     (* get_internal_child)     (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *childname);
};

The GtkBuildableIface interface contains method that are necessary to allow GtkBuilder to construct an object from a GtkBuilder UI definition.

GTypeInterface g_iface;

the parent class

set_name ()

Stores the name attribute given in the GtkBuilder UI definition. GtkWidget stores the name as object data. Implement this method if your object has some notion of "name" and it makes sense to map the XML name attribute to it.

get_name ()

The getter corresponding to set_name. Implement this if you implement set_name.

add_child ()

Adds a child. The type parameter can be used to differentiate the kind of child. GtkContainer implements this to add add a child widget to the container, GtkNotebook uses the type to distinguish between page labels (of type "page-label") and normal children.

set_buildable_property ()

Sets a property of a buildable object. It is normally not necessary to implement this, g_object_set_property() is used by default. GtkWindow implements this to delay showing itself (i.e. setting the "visible" property) until the whole interface is created.

construct_child ()

Constructs a child of a buildable that has been specified as "constructor" in the UI definition. GtkUIManager implements this to reference to a widget created in a <ui> tag which is outside of the normal GtkBuilder UI definition hierarchy. A reference to the constructed object is returned and becomes owned by the caller.

custom_tag_start ()

Implement this if the buildable needs to parse content below <child>. To handle an element, the implementation must fill in the parser structure and user_data and return TRUE. GtkWidget implements this to parse keyboard accelerators specified in <accelerator> elements. GtkContainer implements it to map properties defined via <packing> elements to child properties. Note that user_data must be freed in custom_tag_end or custom_finished.

custom_tag_end ()

Called for the end tag of each custom element that is handled by the buildable (see custom_tag_start).

custom_finished ()

Called for each custom tag handled by the buildable when the builder finishes parsing (see custom_tag_start)

parser_finished ()

Called when a builder finishes the parsing of a UI definition. It is normally not necessary to implement this, unless you need to perform special cleanup actions. GtkWindow sets the "visible" property here.

get_internal_child ()

Returns an internal child of a buildable. GtkDialog implements this to give access to its vbox, making it possible to add children to the vbox in a UI definition. Implement this if the buildable has internal children that may need to be accessed from a UI definition.

gtk_buildable_set_name ()

void                gtk_buildable_set_name              (GtkBuildable *buildable,
                                                         const gchar *name);

Sets the name of the buildable object.

buildable :

a GtkBuildable

name :

name to set

Since 2.12


gtk_buildable_get_name ()

const gchar *       gtk_buildable_get_name              (GtkBuildable *buildable);

Gets the name of the buildable object.

GtkBuilder sets the name based on the the GtkBuilder UI definition used to construct the buildable.

buildable :

a GtkBuildable

Returns :

the name set with gtk_buildable_set_name()

Since 2.12


gtk_buildable_add_child ()

void                gtk_buildable_add_child             (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *type);

Adds a child to buildable. type is an optional string describing how the child should be added.

buildable :

a GtkBuildable

builder :

a GtkBuilder

child :

child to add

type :

kind of child or NULL. [allow-none]

Since 2.12


gtk_buildable_set_buildable_property ()

void                gtk_buildable_set_buildable_property
                                                        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name,
                                                         const GValue *value);

Sets the property name name to value on the buildable object.

buildable :

a GtkBuildable

builder :

a GtkBuilder

name :

name of property

value :

value of property

Since 2.12


gtk_buildable_construct_child ()

GObject *           gtk_buildable_construct_child       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name);

Constructs a child of buildable with the name name.

GtkBuilder calls this function if a "constructor" has been specified in the UI definition.

buildable :

A GtkBuildable

builder :

GtkBuilder used to construct this object

name :

name of child to construct

Returns :

the constructed child. [transfer full]

Since 2.12


gtk_buildable_custom_tag_start ()

gboolean            gtk_buildable_custom_tag_start      (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         GMarkupParser *parser,
                                                         gpointer *data);

This is called for each unknown element under <child>.

buildable :

a GtkBuildable

builder :

a GtkBuilder used to construct this object

child :

child object or NULL for non-child tags. [allow-none]

tagname :

name of tag

parser :

a GMarkupParser structure to fill in

data :

return location for user data that will be passed in to parser functions

Returns :

TRUE if a object has a custom implementation, FALSE if it doesn't.

Since 2.12


gtk_buildable_custom_tag_end ()

void                gtk_buildable_custom_tag_end        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer *data);

This is called at the end of each custom element handled by the buildable.

buildable :

A GtkBuildable

builder :

GtkBuilder used to construct this object

child :

child object or NULL for non-child tags. [allow-none]

tagname :

name of tag

data :

user data that will be passed in to parser functions

Since 2.12


gtk_buildable_custom_finished ()

void                gtk_buildable_custom_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer data);

This is similar to gtk_buildable_parser_finished() but is called once for each custom tag handled by the buildable.

buildable :

a GtkBuildable

builder :

a GtkBuilder

child :

child object or NULL for non-child tags. [allow-none]

tagname :

the name of the tag

data :

user data created in custom_tag_start

Since 2.12


gtk_buildable_parser_finished ()

void                gtk_buildable_parser_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder);

Called when the builder finishes the parsing of a GtkBuilder UI definition. Note that this will be called once for each time gtk_builder_add_from_file() or gtk_builder_add_from_string() is called on a builder.

buildable :

a GtkBuildable

builder :

a GtkBuilder

Since 2.12


gtk_buildable_get_internal_child ()

GObject *           gtk_buildable_get_internal_child    (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *childname);

Get the internal child called childname of the buildable object.

buildable :

a GtkBuildable

builder :

a GtkBuilder

childname :

name of child

Returns :

the internal child of the buildable object. [transfer none]

Since 2.12