Package org.gnome.gobject

Class GObject.ObjectClass

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeClass

org.gnome.gobject.GObject.ObjectClass

All Implemented Interfaces:

Proxy

Direct Known Subclasses:

AlertDialog.AlertDialogClass, Annotation.AnnotationClass, AnnotationProvider.AnnotationProviderClass, Annotations.AnnotationsClass, AppLaunchContext.AppLaunchContextClass, Application.ApplicationClass, ApplicationCommandLine.ApplicationCommandLineClass, Auth.AuthClass, AuthDomain.AuthDomainClass, AuthenticationRequest.AuthenticationRequestClass, AuthManager.AuthManagerClass, AutomationSession.AutomationSessionClass, BackForwardList.BackForwardListClass, BookmarkList.BookmarkListClass, Breakpoint.BreakpointClass, BuilderCScope.BuilderCScopeClass, Cache.CacheClass, Cancellable.CancellableClass, CellAreaContext.CellAreaContextClass, CharsetConverter.CharsetConverterClass, Class.ClassClass, ClipboardPermissionRequest.ClipboardPermissionRequestClass, ColorBalanceChannel.ColorBalanceChannelClass, ColorChooserRequest.ColorChooserRequestClass, ColorDialog.ColorDialogClass, Completion.CompletionClass, CompletionContext.CompletionContextClass, CompletionSnippets.CompletionSnippetsClass, CompletionWords.CompletionWordsClass, Constraint.ConstraintClass, ConstraintGuide.ConstraintGuideClass, ContentDecoder.ContentDecoderClass, ContentProvider.ContentProviderClass, ContentSniffer.ContentSnifferClass, Context.ContextClass, ContextMenu.ContextMenuClass, ContextMenu.ContextMenuClass, CookieJar.CookieJarClass, CookieManager.CookieManagerClass, DataQueue.DataQueueClass, DBusInterfaceSkeleton.DBusInterfaceSkeletonClass, DBusObjectManagerClient.DBusObjectManagerClientClass, DBusObjectManagerServer.DBusObjectManagerServerClass, DBusObjectProxy.DBusObjectProxyClass, DBusObjectSkeleton.DBusObjectSkeletonClass, DBusProxy.DBusProxyClass, DebugControllerDBus.DebugControllerDBusClass, DeviceInfoPermissionRequest.DeviceInfoPermissionRequestClass, DirectoryList.DirectoryListClass, Discoverer.DiscovererClass, DiscovererAudioInfoClass, DiscovererContainerInfoClass, DiscovererInfoClass, DiscovererStreamInfoClass, DiscovererSubtitleInfoClass, DiscovererVideoInfoClass, Download.DownloadClass, EditorState.EditorStateClass, EmblemedIcon.EmblemedIconClass, EncodingTargetClass, EntryBuffer.EntryBufferClass, EnumListItem.EnumListItemClass, EnumListModel.EnumListModelClass, Exception.ExceptionClass, FaviconDatabase.FaviconDatabaseClass, File.FileClass, FileChooserRequest.FileChooserRequestClass, FileDialog.FileDialogClass, FileEnumerator.FileEnumeratorClass, FileLauncher.FileLauncherClass, FileLoader.FileLoaderClass, FileMonitor.FileMonitorClass, FilenameCompleter.FilenameCompleterClass, FileSaver.FileSaverClass, Filter.FilterClass, FilterListModel.FilterListModelClass, FindController.FindControllerClass, FlattenListModel.FlattenListModelClass, Font.FontClass, FontDialog.FontDialogClass, FontFace.FontFaceClass, FontFamily.FontFamilyClass, FontMap.FontMapClass, Fontset.FontsetClass, FormSubmissionRequest.FormSubmissionRequestClass, Frame.FrameClass, GeolocationManager.GeolocationManagerClass, GeolocationPermissionRequest.GeolocationPermissionRequestClass, GLShader.GLShaderClass, GutterLines.GutterLinesClass, Handle.HandleClass, HitTestResult.HitTestResultClass, HitTestResult.HitTestResultClass, Hover.HoverClass, HoverContext.HoverContextClass, HSTSEnforcer.HSTSEnforcerClass, IconPaintable.IconPaintableClass, IMContext.IMContextClass, InetAddress.InetAddressClass, InetAddressMask.InetAddressMaskClass, InitiallyUnowned.InitiallyUnownedClass, InputMethodContext.InputMethodContextClass, InputStream.InputStreamClass, IOStream.IOStreamClass, Language.LanguageClass, LanguageManager.LanguageManagerClass, Layout.LayoutClass, LayoutChild.LayoutChildClass, LayoutManager.LayoutManagerClass, LeafletPage.LeafletPageClass, ListStore.ListStoreClass, ListStore.ListStoreClass, Logger.LoggerClass, MapListModel.MapListModelClass, MarkAttributes.MarkAttributesClass, MediaKeySystemPermissionRequest.MediaKeySystemPermissionRequestClass, MediaStream.MediaStreamClass, MenuAttributeIter.MenuAttributeIterClass, MenuLinkIter.MenuLinkIterClass, MenuModel.MenuModelClass, Message.MessageClass, MountOperation.MountOperationClass, MultiSelection.MultiSelectionClass, NativeDialog.NativeDialogClass, NetworkAddress.NetworkAddressClass, NetworkService.NetworkServiceClass, NetworkSession.NetworkSessionClass, NoSelection.NoSelectionClass, Notification.NotificationClass, NotificationPermissionRequest.NotificationPermissionRequestClass, OptionMenu.OptionMenuClass, OsxAppInfo.OsxAppInfoClass, OutputStream.OutputStreamClass, Permission.PermissionClass, PixbufAnimation.PixbufAnimationClass, PixbufAnimationIter.PixbufAnimationIterClass, PixbufLoader.PixbufLoaderClass, PointerLockPermissionRequest.PointerLockPermissionRequestClass, PolicyDecision.PolicyDecisionClass, PrintCompositor.PrintCompositorClass, PrintDialog.PrintDialogClass, PrintOperation.PrintOperationClass, PrintOperation.PrintOperationClass, RecentManager.RecentManagerClass, Region.RegionClass, Renderer.RendererClass, Resolver.ResolverClass, ScriptWorld.ScriptWorldClass, SearchContext.SearchContextClass, SearchSettings.SearchSettingsClass, SecurityManager.SecurityManagerClass, SelectionFilterModel.SelectionFilterModelClass, Server.ServerClass, ServerMessage.ServerMessageClass, Session.SessionClass, Settings.SettingsClass, Settings.SettingsClass, SettingsBackend.SettingsBackendClass, Shortcut.ShortcutClass, ShortcutsItem.ShortcutsItemClass, ShortcutsSection.ShortcutsSectionClass, SimpleActionGroup.SimpleActionGroupClass, SimpleProxyResolver.SimpleProxyResolverClass, SingleSelection.SingleSelectionClass, SliceListModel.SliceListModelClass, Snippet.SnippetClass, SnippetContext.SnippetContextClass, SnippetManager.SnippetManagerClass, Socket.SocketClass, SocketAddress.SocketAddressClass, SocketAddressEnumerator.SocketAddressEnumeratorClass, SocketClient.SocketClientClass, SocketControlMessage.SocketControlMessageClass, SocketListener.SocketListenerClass, Sorter.SorterClass, SortListModel.SortListModelClass, SpaceDrawer.SpaceDrawerClass, SpinnerPaintable.SpinnerPaintableClass, SqueezerPage.SqueezerPageClass, StringList.StringListClass, StringObject.StringObjectClass, Style.StyleClass, StyleContext.StyleContextClass, StyleManager.StyleManagerClass, StyleScheme.StyleSchemeClass, StyleSchemeManager.StyleSchemeManagerClass, SwipeTracker.SwipeTrackerClass, TabPage.TabPageClass, TextBuffer.TextBufferClass, TextChildAnchor.TextChildAnchorClass, TextMark.TextMarkClass, TextTag.TextTagClass, TlsCertificate.TlsCertificateClass, TlsDatabase.TlsDatabaseClass, TlsInteraction.TlsInteractionClass, TlsPassword.TlsPasswordClass, Toast.ToastClass, Toggle.ToggleClass, TreeListModel.TreeListModelClass, TreeListRow.TreeListRowClass, TreeModelFilter.TreeModelFilterClass, TreeModelSort.TreeModelSortClass, TreeStore.TreeStoreClass, TypeModule.TypeModuleClass, UnixFDList.UnixFDListClass, UriLauncher.UriLauncherClass, URIRequest.URIRequestClass, URIRequest.URIRequestClass, URIResponse.URIResponseClass, URIResponse.URIResponseClass, URISchemeRequest.URISchemeRequestClass, URISchemeResponse.URISchemeResponseClass, UserContentFilterStore.UserContentFilterStoreClass, UserContentManager.UserContentManagerClass, UserMediaPermissionRequest.UserMediaPermissionRequestClass, Value.ValueClass, Vfs.VfsClass, ViewStackPage.ViewStackPageClass, ViewStackPages.ViewStackPagesClass, VirtualMachine.VirtualMachineClass, VolumeMonitor.VolumeMonitorClass, WeakValue.WeakValueClass, WebContext.WebContextClass, WebEditor.WebEditorClass, WebFormManager.WebFormManagerClass, WebHitTestResult.WebHitTestResultClass, WebInspector.WebInspectorClass, WebPage.WebPageClass, WebProcessExtension.WebProcessExtensionClass, WebResource.WebResourceClass, WebsiteDataAccessPermissionRequest.WebsiteDataAccessPermissionRequestClass, WebsiteDataManager.WebsiteDataManagerClass, WebsitePolicies.WebsitePoliciesClass, WebsocketConnection.WebsocketConnectionClass, WebsocketExtension.WebsocketExtensionClass, WebsocketExtensionManager.WebsocketExtensionManagerClass, WidgetPaintable.WidgetPaintableClass, WindowGroup.WindowGroupClass, WindowProperties.WindowPropertiesClass, ZlibCompressor.ZlibCompressorClass, ZlibDecompressor.ZlibDecompressorClass

Enclosing class:

GObject

public static class GObject.ObjectClass
extends TypeClass

The class structure for the GObject type.

// Example of implementing a singleton using a constructor.
 static MySingleton *the_singleton = NULL;

 static GObject*
 my_singleton_constructor (GType                  type,
                           guint                  n_construct_params,
                           GObjectConstructParam *construct_params)
 {
   GObject *object;
   
   if (!the_singleton)
     {
       object = G_OBJECT_CLASS (parent_class)->constructor (type,
                                                            n_construct_params,
                                                            construct_params);
       the_singleton = MY_SINGLETON (object);
     }
   else
     object = g_object_ref (G_OBJECT (the_singleton));

   return object;
 }
 

Constructor Summary

Constructors

Constructor	Description
ObjectClass(MemorySegment address)	Create a ObjectClass proxy instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
ParamSpec	findProperty(String propertyName)	Looks up the GParamSpec for a property of a class.
static MemoryLayout	getMemoryLayout()	The memory layout of the native struct.
void	installProperties(@Nullable ParamSpec @Nullable [] pspecs)	Installs new properties from an array of GParamSpecs.
void	installProperty(int propertyId, ParamSpec pspec)	Installs a new property.
ParamSpec[]	listProperties()	Get an array of GParamSpec* for all properties of a class.
void	overrideConstructed(Arena arena, @Nullable Method method)	Override virtual method constructed.
void	overrideConstructor(Arena arena, @Nullable Method method)	Override virtual method constructor.
void	overrideDispatchPropertiesChanged(Arena arena, @Nullable Method method)	Override virtual method dispatch_properties_changed.
void	overrideDispose(Arena arena, @Nullable Method method)	Override virtual method dispose.
void	overrideFinalize(Arena arena, @Nullable Method method)	Override virtual method finalize.
void	overrideGetProperty(Arena arena, @Nullable Method method)	Override virtual method get_property.
void	overrideNotify(Arena arena, @Nullable Method method)	Override virtual method notify.
void	overrideProperty(int propertyId, String name)	Registers propertyId as referring to a property with the name name in a parent class or in an interface implemented by oclass. This allows this class to "override" a property implementation in a parent class or to provide the implementation of a property from an interface.
void	overrideSetProperty(Arena arena, @Nullable Method method)	Override virtual method set_property.
SList<MemorySegment>	readConstructProperties()	Read the value of the field construct_properties.
long	readFlags()	Read the value of the field flags.
long	readNConstructProperties()	Read the value of the field n_construct_properties.
long	readNPspecs()	Read the value of the field n_pspecs.
@Nullable MemorySegment @Nullable []	readPdummy()	Read the value of the field pdummy.
MemorySegment	readPspecs()	Read the value of the field pspecs.
void	writeConstructProperties(SList<MemorySegment> constructProperties)	Write a value in the field construct_properties.
void	writeFlags(long flags)	Write a value in the field flags.
void	writeNConstructProperties(long nConstructProperties)	Write a value in the field n_construct_properties.
void	writeNPspecs(long nPspecs)	Write a value in the field n_pspecs.
void	writePdummy(@Nullable MemorySegment @Nullable [] pdummy, Arena _arena)	Write a value in the field pdummy.
void	writePspecs(MemorySegment pspecs)	Write a value in the field pspecs.

Methods inherited from class org.gnome.gobject.TypeClass

addPrivate, adjustPrivateOffset, get, getInstancePrivateOffset, getPrivate, peek, peekParent, peekStatic, readGType, ref, unref, unrefUncached, writeGType

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ObjectClass

public ObjectClass(MemorySegment address)

Create a ObjectClass proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

Method Details

getMemoryLayout

public static MemoryLayout getMemoryLayout()

The memory layout of the native struct.

Returns:

the memory layout

readConstructProperties

public SList<MemorySegment> readConstructProperties()

Read the value of the field construct_properties.

Returns:

The value of the field construct_properties

writeConstructProperties

public void writeConstructProperties(SList<MemorySegment> constructProperties)

Write a value in the field construct_properties.

Parameters:

constructProperties - The new value for the field construct_properties

overrideConstructor

public void overrideConstructor(Arena arena,
 @Nullable Method method)

Override virtual method constructor.

Parameters:

method - the method to invoke

overrideSetProperty

public void overrideSetProperty(Arena arena,
 @Nullable Method method)

Override virtual method set_property.

Parameters:

method - the method to invoke

overrideGetProperty

public void overrideGetProperty(Arena arena,
 @Nullable Method method)

Override virtual method get_property.

Parameters:

method - the method to invoke

overrideDispose

public void overrideDispose(Arena arena,
 @Nullable Method method)

Override virtual method dispose.

Parameters:

method - the method to invoke

overrideFinalize

public void overrideFinalize(Arena arena,
 @Nullable Method method)

Override virtual method finalize.

Parameters:

method - the method to invoke

overrideDispatchPropertiesChanged

public void overrideDispatchPropertiesChanged(Arena arena,
 @Nullable Method method)

Override virtual method dispatch_properties_changed.

Parameters:

method - the method to invoke

overrideNotify

public void overrideNotify(Arena arena,
 @Nullable Method method)

Override virtual method notify.

Parameters:

method - the method to invoke

overrideConstructed

public void overrideConstructed(Arena arena,
 @Nullable Method method)

Override virtual method constructed.

Parameters:

method - the method to invoke

readFlags

public long readFlags()

Read the value of the field flags.

Returns:

The value of the field flags

writeFlags

public void writeFlags(long flags)

Write a value in the field flags.

Parameters:

flags - The new value for the field flags

readNConstructProperties

public long readNConstructProperties()

Read the value of the field n_construct_properties.

Returns:

The value of the field n_construct_properties

writeNConstructProperties

public void writeNConstructProperties(long nConstructProperties)

Write a value in the field n_construct_properties.

Parameters:

nConstructProperties - The new value for the field n_construct_properties

readPspecs

public MemorySegment readPspecs()

Read the value of the field pspecs.

Returns:

The value of the field pspecs

writePspecs

public void writePspecs(MemorySegment pspecs)

Write a value in the field pspecs.

Parameters:

pspecs - The new value for the field pspecs

readNPspecs

public long readNPspecs()

Read the value of the field n_pspecs.

Returns:

The value of the field n_pspecs

writeNPspecs

public void writeNPspecs(long nPspecs)

Write a value in the field n_pspecs.

Parameters:

nPspecs - The new value for the field n_pspecs

readPdummy

public @Nullable MemorySegment @Nullable [] readPdummy()

Read the value of the field pdummy.

Returns:

The value of the field pdummy

writePdummy

public void writePdummy(@Nullable MemorySegment @Nullable [] pdummy,
 Arena _arena)

Write a value in the field pdummy.

Parameters:

pdummy - The new value for the field pdummy

findProperty

public ParamSpec findProperty(String propertyName)

Looks up the GParamSpec for a property of a class.

Parameters:

propertyName - the name of the property to look up

Returns:

the GParamSpec for the property, or null if the class doesn't have a property of that name

installProperties

public void installProperties(@Nullable ParamSpec @Nullable [] pspecs)

Installs new properties from an array of GParamSpecs.

All properties should be installed during the class initializer. It is possible to install properties after that, but doing so is not recommend, and specifically, is not guaranteed to be thread-safe vs. use of properties on the same type on other threads.

The property id of each property is the index of each GParamSpec in the pspecs array.

The property id of 0 is treated specially by GObject and it should not be used to store a GParamSpec.

This function should be used if you plan to use a static array of GParamSpecs and g_object_notify_by_pspec(). For instance, this class initialization:

typedef enum {
   PROP_FOO = 1,
   PROP_BAR,
   N_PROPERTIES
 } MyObjectProperty;

 static GParamSpec *obj_properties[N_PROPERTIES] = { NULL, };

 static void
 my_object_class_init (MyObjectClass *klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

   obj_properties[PROP_FOO] =
     g_param_spec_int ("foo", NULL, NULL,
                       -1, G_MAXINT,
                       0,
                       G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

   obj_properties[PROP_BAR] =
     g_param_spec_string ("bar", NULL, NULL,
                          NULL,
                          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

   gobject_class->set_property = my_object_set_property;
   gobject_class->get_property = my_object_get_property;
   g_object_class_install_properties (gobject_class,
                                      G_N_ELEMENTS (obj_properties),
                                      obj_properties);
 }
 

allows calling g_object_notify_by_pspec() to notify of property changes:

void
 my_object_set_foo (MyObject *self, gint foo)
 {
   if (self->foo != foo)
     {
       self->foo = foo;
       g_object_notify_by_pspec (G_OBJECT (self), obj_properties[PROP_FOO]);
     }
  }
 

Parameters:

pspecs - the GParamSpecs array defining the new properties

Since:

2.26

installProperty

public void installProperty(int propertyId,
 ParamSpec pspec)

Installs a new property.

All properties should be installed during the class initializer. It is possible to install properties after that, but doing so is not recommend, and specifically, is not guaranteed to be thread-safe vs. use of properties on the same type on other threads.

Note that it is possible to redefine a property in a derived class, by installing a property with the same name. This can be useful at times, e.g. to change the range of allowed values or the default value.

Parameters:

propertyId - the id for the new property

pspec - the GParamSpec for the new property

listProperties

public ParamSpec[] listProperties()

Get an array of GParamSpec* for all properties of a class.

Returns:

an array of GParamSpec* which should be freed after use

overrideProperty

public void overrideProperty(int propertyId,
 String name)

Registers propertyId as referring to a property with the name name in a parent class or in an interface implemented by oclass. This allows this class to "override" a property implementation in a parent class or to provide the implementation of a property from an interface.

Internally, overriding is implemented by creating a property of type GParamSpecOverride; generally operations that query the properties of the object class, such as g_object_class_find_property() or g_object_class_list_properties() will return the overridden property. However, in one case, the constructProperties argument of the constructor virtual function, the GParamSpecOverride is passed instead, so that the paramId field of the GParamSpec will be correct. For virtually all uses, this makes no difference. If you need to get the overridden property, you can call g_param_spec_get_redirect_target().

Parameters:

propertyId - the new property ID

name - the name of a property registered in a parent class or in an interface of this class.

Since:

2.4