/* GTK - The GIMP Toolkit * Copyright (C) 2006-2007 Async Open Source, * Johan Dahlin * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library. If not, see . */ #ifndef __GTK_BUILDABLE_H__ #define __GTK_BUILDABLE_H__ #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION) #error "Only can be included directly." #endif #include G_BEGIN_DECLS #define GTK_TYPE_BUILDABLE (gtk_buildable_get_type ()) #define GTK_BUILDABLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_BUILDABLE, GtkBuildable)) #define GTK_IS_BUILDABLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_BUILDABLE)) #define GTK_BUILDABLE_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GTK_TYPE_BUILDABLE, GtkBuildableIface)) typedef struct _GtkBuildable GtkBuildable; /* Dummy typedef */ typedef struct _GtkBuildableIface GtkBuildableIface; typedef struct _GtkBuildableParseContext GtkBuildableParseContext; typedef struct _GtkBuildableParser GtkBuildableParser; /** * GtkBuildableParseContext: * * An opaque context struct for `GtkBuildableParser`. */ /** * GtkBuildableParser: * @start_element: function called for open elements * @end_element: function called for close elements * @text: function called for character data * @error: function called on error * * A sub-parser for `GtkBuildable` implementations. */ struct _GtkBuildableParser { /* Called for open tags */ void (*start_element) (GtkBuildableParseContext *context, const char *element_name, const char **attribute_names, const char **attribute_values, gpointer user_data, GError **error); /* Called for close tags */ void (*end_element) (GtkBuildableParseContext *context, const char *element_name, gpointer user_data, GError **error); /* Called for character data */ /* text is not nul-terminated */ void (*text) (GtkBuildableParseContext *context, const char *text, gsize text_len, gpointer user_data, GError **error); /* Called on error, including one set by other * methods in the vtable. The GError should not be freed. */ void (*error) (GtkBuildableParseContext *context, GError *error, gpointer user_data); /*< private >*/ gpointer padding[4]; }; /** * GtkBuildableIface: * @g_iface: the parent class * @set_id: Stores the id attribute given in the `GtkBuilder` UI definition. * `GtkWidget` stores the name as object data. Implement this method if your * object has some notion of “ID” and it makes sense to map the XML id * attribute to it. * @get_id: The getter corresponding to @set_id. Implement this * if you implement @set_id. * @add_child: Adds a child. The @type parameter can be used to * differentiate the kind of child. `GtkWidget` implements this * to add event controllers to the widget, `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 [property@GtkWidget: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. This can be used to * reference a widget created in a 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 . To handle an element, the implementation * must fill in the @parser and @user_data and return %TRUE. * #GtkWidget implements this to parse accessible attributes specified * in elements. * 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 #GtkWidget: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. * * The `GtkBuildableIface` interface contains methods that are * necessary to allow `GtkBuilder` to construct an object from * a `GtkBuilder` UI definition. */ struct _GtkBuildableIface { GTypeInterface g_iface; /* virtual table */ void (* set_id) (GtkBuildable *buildable, const char *id); const char * (* get_id) (GtkBuildable *buildable); /** * GtkBuildableIface::add_child: * @buildable: a #GtkBuildable * @builder: a #GtkBuilder * @child: child to add * @type: (nullable): kind of child or %NULL * * Adds a child to @buildable. @type is an optional string * describing how the child should be added. */ void (* add_child) (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const char *type); void (* set_buildable_property) (GtkBuildable *buildable, GtkBuilder *builder, const char *name, const GValue *value); GObject * (* construct_child) (GtkBuildable *buildable, GtkBuilder *builder, const char *name); /** * GtkBuildableIface::custom_tag_start: * @buildable: a #GtkBuildable * @builder: a #GtkBuilder used to construct this object * @child: (nullable): child object or %NULL for non-child tags * @tagname: name of tag * @parser: (out): a #GtkBuildableParser to fill in * @data: (out): return location for user data that will be passed in * to parser functions * * Called for each unknown element under ``. * * Returns: %TRUE if an object has a custom implementation, %FALSE * if it doesn't. */ gboolean (* custom_tag_start) (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const char *tagname, GtkBuildableParser *parser, gpointer *data); /** * GtkBuildableIface::custom_tag_end: * @buildable: A #GtkBuildable * @builder: #GtkBuilder used to construct this object * @child: (nullable): child object or %NULL for non-child tags * @tagname: name of tag * @data: user data that will be passed in to parser functions * * Called at the end of each custom element handled by * the buildable. */ void (* custom_tag_end) (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const char *tagname, gpointer data); /** * GtkBuildableIface::custom_finished: * @buildable: a #GtkBuildable * @builder: a #GtkBuilder * @child: (nullable): child object or %NULL for non-child tags * @tagname: the name of the tag * @data: user data created in custom_tag_start * * Similar to gtk_buildable_parser_finished() but is * called once for each custom tag handled by the @buildable. */ void (* custom_finished) (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const char *tagname, gpointer data); void (* parser_finished) (GtkBuildable *buildable, GtkBuilder *builder); /** * GtkBuildableIface::get_internal_child: * @buildable: a #GtkBuildable * @builder: a #GtkBuilder * @childname: name of child * * Retrieves the internal child called @childname of the @buildable object. * * Returns: (transfer none): the internal child of the buildable object */ GObject * (* get_internal_child) (GtkBuildable *buildable, GtkBuilder *builder, const char *childname); }; GDK_AVAILABLE_IN_ALL GType gtk_buildable_get_type (void) G_GNUC_CONST; GDK_AVAILABLE_IN_ALL const char * gtk_buildable_get_buildable_id (GtkBuildable *buildable); GDK_AVAILABLE_IN_ALL void gtk_buildable_parse_context_push (GtkBuildableParseContext *context, const GtkBuildableParser *parser, gpointer user_data); GDK_AVAILABLE_IN_ALL gpointer gtk_buildable_parse_context_pop (GtkBuildableParseContext *context); GDK_AVAILABLE_IN_ALL const char * gtk_buildable_parse_context_get_element (GtkBuildableParseContext *context); GDK_AVAILABLE_IN_ALL GPtrArray *gtk_buildable_parse_context_get_element_stack (GtkBuildableParseContext *context); GDK_AVAILABLE_IN_ALL void gtk_buildable_parse_context_get_position (GtkBuildableParseContext *context, int *line_number, int *char_number); G_END_DECLS #endif /* __GTK_BUILDABLE_H__ */