/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module gtk.Container;

private import cairo.Context;
private import glib.ListG;
private import glib.Str;
private import gobject.ObjectG;
private import gobject.ParamSpec;
private import gobject.Signals;
private import gobject.Value;
private import gtk.Adjustment;
private import gtk.Widget;
private import gtk.WidgetPath;
private import gtkc.gtk;
public  import gtkc.gtktypes;
private import std.algorithm;


/**
 * A GTK+ user interface is constructed by nesting widgets inside widgets.
 * Container widgets are the inner nodes in the resulting tree of widgets:
 * they contain other widgets. So, for example, you might have a #GtkWindow
 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
 * of a textual label inside the frame, you might replace the #GtkLabel widget
 * with a #GtkImage widget.
 * 
 * There are two major kinds of container widgets in GTK+. Both are subclasses
 * of the abstract GtkContainer base class.
 * 
 * The first type of container widget has a single child widget and derives
 * from #GtkBin. These containers are decorators, which
 * add some kind of functionality to the child. For example, a #GtkButton makes
 * its child into a clickable button; a #GtkFrame draws a frame around its child
 * and a #GtkWindow places its child widget inside a top-level window.
 * 
 * The second type of container can have more than one child; its purpose is to
 * manage layout. This means that these containers assign
 * sizes and positions to their children. For example, a #GtkHBox arranges its
 * children in a horizontal row, and a #GtkGrid arranges the widgets it contains
 * in a two-dimensional grid.
 * 
 * For implementations of #GtkContainer the virtual method #GtkContainerClass.forall()
 * is always required, since it's used for drawing and other internal operations
 * on the children.
 * If the #GtkContainer implementation expect to have non internal children
 * it's needed to implement both #GtkContainerClass.add() and #GtkContainerClass.remove().
 * If the GtkContainer implementation has internal children, they should be added
 * with gtk_widget_set_parent() on init() and removed with gtk_widget_unparent()
 * in the #GtkWidgetClass.destroy() implementation.
 * See more about implementing custom widgets at https://wiki.gnome.org/HowDoI/CustomWidgets
 * 
 * # Height for width geometry management
 * 
 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
 * Height-for-width means that a widget can change how much vertical space it needs,
 * depending on the amount of horizontal space that it is given (and similar for
 * width-for-height).
 * 
 * There are some things to keep in mind when implementing container widgets
 * that make use of GTK+’s height for width geometry management system. First,
 * it’s important to note that a container must prioritize one of its
 * dimensions, that is to say that a widget or container can only have a
 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
 * must be able to respond to the APIs for both dimensions, i.e. even if a
 * widget has a request mode that is height-for-width, it is possible that
 * its parent will request its sizes using the width-for-height APIs.
 * 
 * To ensure that everything works properly, here are some guidelines to follow
 * when implementing height-for-width (or width-for-height) containers.
 * 
 * Each request mode involves 2 virtual methods. Height-for-width apis run
 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
 * When handling requests in the opposite #GtkSizeRequestMode it is important that
 * every widget request at least enough space to display all of its content at all times.
 * 
 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
 * the container must return the height for its minimum width. This is easily achieved by
 * simply calling the reverse apis implemented for itself as follows:
 * 
 * |[<!-- language="C" -->
 * static void
 * foo_container_get_preferred_height (GtkWidget *widget,
 * gint *min_height,
 * gint *nat_height)
 * {
 * if (i_am_in_height_for_width_mode)
 * {
 * gint min_width;
 * 
 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
 * &min_width,
 * NULL);
 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width
 * (widget,
 * min_width,
 * min_height,
 * nat_height);
 * }
 * else
 * {
 * ... many containers support both request modes, execute the
 * real width-for-height request here by returning the
 * collective heights of all widgets that are stacked
 * vertically (or whatever is appropriate for this container)
 * ...
 * }
 * }
 * ]|
 * 
 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
 * that is height-for-width, it then only needs to return the base minimum width like so:
 * 
 * |[<!-- language="C" -->
 * static void
 * foo_container_get_preferred_width_for_height (GtkWidget *widget,
 * gint for_height,
 * gint *min_width,
 * gint *nat_width)
 * {
 * if (i_am_in_height_for_width_mode)
 * {
 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
 * min_width,
 * nat_width);
 * }
 * else
 * {
 * ... execute the real width-for-height request here based on
 * the required width of the children collectively if the
 * container were to be allocated the said height ...
 * }
 * }
 * ]|
 * 
 * Height for width requests are generally implemented in terms of a virtual allocation
 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
 * would implement the get_preferred_height_for_width() virtual function by first calling
 * gtk_widget_get_preferred_width() for each of its children.
 * 
 * For each potential group of children that are lined up horizontally, the values returned by
 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures.
 * Any child spacing should be removed from the input @for_width and then the collective size should be
 * allocated using the gtk_distribute_natural_allocation() convenience function.
 * 
 * The container will then move on to request the preferred height for each child by using
 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
 * 
 * To allocate a height-for-width container, it’s again important
 * to consider that a container must prioritize one dimension over the other. So if
 * a container is a height-for-width container it must first allocate all widgets horizontally
 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
 * extra space (if and where appropriate) for the widget to expand.
 * 
 * After adding all the expand space, the container assumes it was allocated sufficient
 * height to fit all of its content. At this time, the container must use the total horizontal sizes
 * of each widget to request the height-for-width of each of its children and store the requests in a
 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
 * be generalized into the heights and widths of rows and columns).
 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
 * while this time considering the allocated height of the widget minus any vertical spacing
 * that the container adds. Then vertical expand space should be added where appropriate and available
 * and the container should go on to actually allocating the child widgets.
 * 
 * See [GtkWidget’s geometry management section][geometry-management]
 * to learn more about implementing height-for-width geometry management for widgets.
 * 
 * # Child properties
 * 
 * GtkContainer introduces child properties.
 * These are object properties that are not specific
 * to either the container or the contained widget, but rather to their relation.
 * Typical examples of child properties are the position or pack-type of a widget
 * which is contained in a #GtkBox.
 * 
 * Use gtk_container_class_install_child_property() to install child properties
 * for a container class and gtk_container_class_find_child_property() or
 * gtk_container_class_list_child_properties() to get information about existing
 * child properties.
 * 
 * To set the value of a child property, use gtk_container_child_set_property(),
 * gtk_container_child_set() or gtk_container_child_set_valist().
 * To obtain the value of a child property, use
 * gtk_container_child_get_property(), gtk_container_child_get() or
 * gtk_container_child_get_valist(). To emit notification about child property
 * changes, use gtk_widget_child_notify().
 * 
 * # GtkContainer as GtkBuildable
 * 
 * The GtkContainer implementation of the GtkBuildable interface supports
 * a <packing> element for children, which can contain multiple <property>
 * elements that specify child properties for the child.
 * 
 * Since 2.16, child properties can also be marked as translatable using
 * the same “translatable”, “comments” and “context” attributes that are used
 * for regular properties.
 * 
 * Since 3.16, containers can have a <focus-chain> element containing multiple
 * <widget> elements, one for each child that should be added to the focus
 * chain. The ”name” attribute gives the id of the widget.
 * 
 * An example of these properties in UI definitions:
 * |[
 * <object class="GtkBox">
 * <child>
 * <object class="GtkEntry" id="entry1"/>
 * <packing>
 * <property name="pack-type">start</property>
 * </packing>
 * </child>
 * <child>
 * <object class="GtkEntry" id="entry2"/>
 * </child>
 * <focus-chain>
 * <widget name="entry1"/>
 * <widget name="entry2"/>
 * </focus-chain>
 * </object>
 * ]|
 */
public class Container : Widget
{
	/** the main Gtk struct */
	protected GtkContainer* gtkContainer;

	/** Get the main Gtk struct */
	public GtkContainer* getContainerStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gtkContainer;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gtkContainer;
	}

	protected override void setStruct(GObject* obj)
	{
		gtkContainer = cast(GtkContainer*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GtkContainer* gtkContainer, bool ownedRef = false)
	{
		this.gtkContainer = gtkContainer;
		super(cast(GtkWidget*)gtkContainer, ownedRef);
	}

	/**
	 * Removes all widgets from the container
	 */
	void removeAll()
	{
		GList* gList = gtk_container_get_children(getContainerStruct());
		if ( gList !is null )
		{
			ListG children = new ListG(gList);
			for ( int i=children.length()-1 ; i>=0 ; i-- )
			{
				gtk_container_remove(getContainerStruct(), cast(GtkWidget*)children.nthData(i));
			}
		}
	}

	/**
	 */

	/** */
	public static GType getType()
	{
		return gtk_container_get_type();
	}

	/**
	 * Adds @widget to @container. Typically used for simple containers
	 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
	 * layout containers such as #GtkBox or #GtkGrid, this function will
	 * pick default packing parameters that may not be correct.  So
	 * consider functions such as gtk_box_pack_start() and
	 * gtk_grid_attach() as an alternative to gtk_container_add() in
	 * those cases. A widget may be added to only one container at a time;
	 * you can’t place the same widget inside two different containers.
	 *
	 * Note that some containers, such as #GtkScrolledWindow or #GtkListBox,
	 * may add intermediate children between the added widget and the
	 * container.
	 *
	 * Params:
	 *     widget = a widget to be placed inside @container
	 */
	public void add(Widget widget)
	{
		gtk_container_add(gtkContainer, (widget is null) ? null : widget.getWidgetStruct());
	}

	/** */
	public void checkResize()
	{
		gtk_container_check_resize(gtkContainer);
	}

	/**
	 * Gets the value of a child property for @child and @container.
	 *
	 * Params:
	 *     child = a widget which is a child of @container
	 *     propertyName = the name of the property to get
	 *     value = a location to return the value
	 */
	public void childGetProperty(Widget child, string propertyName, Value value)
	{
		gtk_container_child_get_property(gtkContainer, (child is null) ? null : child.getWidgetStruct(), Str.toStringz(propertyName), (value is null) ? null : value.getValueStruct());
	}

	/**
	 * Gets the values of one or more child properties for @child and @container.
	 *
	 * Params:
	 *     child = a widget which is a child of @container
	 *     firstPropertyName = the name of the first property to get
	 *     varArgs = return location for the first property, followed
	 *         optionally by more name/return location pairs, followed by %NULL
	 */
	public void childGetValist(Widget child, string firstPropertyName, void* varArgs)
	{
		gtk_container_child_get_valist(gtkContainer, (child is null) ? null : child.getWidgetStruct(), Str.toStringz(firstPropertyName), varArgs);
	}

	/**
	 * Emits a #GtkWidget::child-notify signal for the
	 * [child property][child-properties]
	 * @child_property on the child.
	 *
	 * This is an analogue of g_object_notify() for child properties.
	 *
	 * Also see gtk_widget_child_notify().
	 *
	 * Params:
	 *     child = the child widget
	 *     childProperty = the name of a child property installed on
	 *         the class of @container
	 *
	 * Since: 3.2
	 */
	public void childNotify(Widget child, string childProperty)
	{
		gtk_container_child_notify(gtkContainer, (child is null) ? null : child.getWidgetStruct(), Str.toStringz(childProperty));
	}

	/**
	 * Emits a #GtkWidget::child-notify signal for the
	 * [child property][child-properties] specified by
	 * @pspec on the child.
	 *
	 * This is an analogue of g_object_notify_by_pspec() for child properties.
	 *
	 * Params:
	 *     child = the child widget
	 *     pspec = the #GParamSpec of a child property instealled on
	 *         the class of @container
	 *
	 * Since: 3.18
	 */
	public void childNotifyByPspec(Widget child, ParamSpec pspec)
	{
		gtk_container_child_notify_by_pspec(gtkContainer, (child is null) ? null : child.getWidgetStruct(), (pspec is null) ? null : pspec.getParamSpecStruct());
	}

	/**
	 * Sets a child property for @child and @container.
	 *
	 * Params:
	 *     child = a widget which is a child of @container
	 *     propertyName = the name of the property to set
	 *     value = the value to set the property to
	 */
	public void childSetProperty(Widget child, string propertyName, Value value)
	{
		gtk_container_child_set_property(gtkContainer, (child is null) ? null : child.getWidgetStruct(), Str.toStringz(propertyName), (value is null) ? null : value.getValueStruct());
	}

	/**
	 * Sets one or more child properties for @child and @container.
	 *
	 * Params:
	 *     child = a widget which is a child of @container
	 *     firstPropertyName = the name of the first property to set
	 *     varArgs = a %NULL-terminated list of property names and values, starting
	 *         with @first_prop_name
	 */
	public void childSetValist(Widget child, string firstPropertyName, void* varArgs)
	{
		gtk_container_child_set_valist(gtkContainer, (child is null) ? null : child.getWidgetStruct(), Str.toStringz(firstPropertyName), varArgs);
	}

	/**
	 * Returns the type of the children supported by the container.
	 *
	 * Note that this may return %G_TYPE_NONE to indicate that no more
	 * children can be added, e.g. for a #GtkPaned which already has two
	 * children.
	 *
	 * Returns: a #GType.
	 */
	public GType childType()
	{
		return gtk_container_child_type(gtkContainer);
	}

	/**
	 * Invokes @callback on each direct child of @container, including
	 * children that are considered “internal” (implementation details
	 * of the container). “Internal” children generally weren’t added
	 * by the user of the container, but were added by the container
	 * implementation itself.
	 *
	 * Most applications should use gtk_container_foreach(), rather
	 * than gtk_container_forall().
	 *
	 * Params:
	 *     callback = a callback
	 *     callbackData = callback user data
	 */
	public void forall(GtkCallback callback, void* callbackData)
	{
		gtk_container_forall(gtkContainer, callback, callbackData);
	}

	/**
	 * Invokes @callback on each non-internal child of @container.
	 * See gtk_container_forall() for details on what constitutes
	 * an “internal” child. For all practical purposes, this function
	 * should iterate over precisely those child widgets that were
	 * added to the container by the application with explicit add()
	 * calls.
	 *
	 * Most applications should use gtk_container_foreach(),
	 * rather than gtk_container_forall().
	 *
	 * Params:
	 *     callback = a callback
	 *     callbackData = callback user data
	 */
	public void foreac(GtkCallback callback, void* callbackData)
	{
		gtk_container_foreach(gtkContainer, callback, callbackData);
	}

	/**
	 * Retrieves the border width of the container. See
	 * gtk_container_set_border_width().
	 *
	 * Returns: the current border width
	 */
	public uint getBorderWidth()
	{
		return gtk_container_get_border_width(gtkContainer);
	}

	/**
	 * Returns the container’s non-internal children. See
	 * gtk_container_forall() for details on what constitutes an "internal" child.
	 *
	 * Returns: a newly-allocated list of the container’s non-internal children.
	 */
	public ListG getChildren()
	{
		auto p = gtk_container_get_children(gtkContainer);
		
		if(p is null)
		{
			return null;
		}
		
		return new ListG(cast(GList*) p);
	}

	/**
	 * Retrieves the focus chain of the container, if one has been
	 * set explicitly. If no focus chain has been explicitly
	 * set, GTK+ computes the focus chain based on the positions
	 * of the children. In that case, GTK+ stores %NULL in
	 * @focusable_widgets and returns %FALSE.
	 *
	 * Params:
	 *     focusableWidgets = location
	 *         to store the focus chain of the
	 *         container, or %NULL. You should free this list
	 *         using g_list_free() when you are done with it, however
	 *         no additional reference count is added to the
	 *         individual widgets in the focus chain.
	 *
	 * Returns: %TRUE if the focus chain of the container
	 *     has been set explicitly.
	 */
	public bool getFocusChain(out ListG focusableWidgets)
	{
		GList* outfocusableWidgets = null;
		
		auto p = gtk_container_get_focus_chain(gtkContainer, &outfocusableWidgets) != 0;
		
		focusableWidgets = new ListG(outfocusableWidgets);
		
		return p;
	}

	/**
	 * Returns the current focus child widget inside @container. This is not the
	 * currently focused widget. That can be obtained by calling
	 * gtk_window_get_focus().
	 *
	 * Returns: The child widget which will receive the
	 *     focus inside @container when the @container is focused,
	 *     or %NULL if none is set.
	 *
	 * Since: 2.14
	 */
	public Widget getFocusChild()
	{
		auto p = gtk_container_get_focus_child(gtkContainer);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Widget)(cast(GtkWidget*) p);
	}

	/**
	 * Retrieves the horizontal focus adjustment for the container. See
	 * gtk_container_set_focus_hadjustment ().
	 *
	 * Returns: the horizontal focus adjustment, or %NULL if
	 *     none has been set.
	 */
	public Adjustment getFocusHadjustment()
	{
		auto p = gtk_container_get_focus_hadjustment(gtkContainer);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Adjustment)(cast(GtkAdjustment*) p);
	}

	/**
	 * Retrieves the vertical focus adjustment for the container. See
	 * gtk_container_set_focus_vadjustment().
	 *
	 * Returns: the vertical focus adjustment, or
	 *     %NULL if none has been set.
	 */
	public Adjustment getFocusVadjustment()
	{
		auto p = gtk_container_get_focus_vadjustment(gtkContainer);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Adjustment)(cast(GtkAdjustment*) p);
	}

	/**
	 * Returns a newly created widget path representing all the widget hierarchy
	 * from the toplevel down to and including @child.
	 *
	 * Params:
	 *     child = a child of @container
	 *
	 * Returns: A newly created #GtkWidgetPath
	 */
	public WidgetPath getPathForChild(Widget child)
	{
		auto p = gtk_container_get_path_for_child(gtkContainer, (child is null) ? null : child.getWidgetStruct());
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(WidgetPath)(cast(GtkWidgetPath*) p, true);
	}

	/**
	 * Returns the resize mode for the container. See
	 * gtk_container_set_resize_mode ().
	 *
	 * Deprecated: Resize modes are deprecated. They aren’t necessary
	 * anymore since frame clocks and might introduce obscure bugs if
	 * used.
	 *
	 * Returns: the current resize mode
	 */
	public GtkResizeMode getResizeMode()
	{
		return gtk_container_get_resize_mode(gtkContainer);
	}

	/**
	 * When a container receives a call to the draw function, it must send
	 * synthetic #GtkWidget::draw calls to all children that don’t have their
	 * own #GdkWindows. This function provides a convenient way of doing this.
	 * A container, when it receives a call to its #GtkWidget::draw function,
	 * calls gtk_container_propagate_draw() once for each child, passing in
	 * the @cr the container received.
	 *
	 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
	 * and deciding whether the draw needs to be sent to the child. It is a
	 * convenient and optimized way of getting the same effect as calling
	 * gtk_widget_draw() on the child directly.
	 *
	 * In most cases, a container can simply either inherit the
	 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
	 * and then chain to the ::draw implementation from #GtkContainer.
	 *
	 * Params:
	 *     child = a child of @container
	 *     cr = Cairo context as passed to the container. If you want to use @cr
	 *         in container’s draw function, consider using cairo_save() and
	 *         cairo_restore() before calling this function.
	 */
	public void propagateDraw(Widget child, Context cr)
	{
		gtk_container_propagate_draw(gtkContainer, (child is null) ? null : child.getWidgetStruct(), (cr is null) ? null : cr.getContextStruct());
	}

	/**
	 * Removes @widget from @container. @widget must be inside @container.
	 * Note that @container will own a reference to @widget, and that this
	 * may be the last reference held; so removing a widget from its
	 * container can destroy that widget. If you want to use @widget
	 * again, you need to add a reference to it before removing it from
	 * a container, using g_object_ref(). If you don’t want to use @widget
	 * again it’s usually more efficient to simply destroy it directly
	 * using gtk_widget_destroy() since this will remove it from the
	 * container and help break any circular reference count cycles.
	 *
	 * Params:
	 *     widget = a current child of @container
	 */
	public void remove(Widget widget)
	{
		gtk_container_remove(gtkContainer, (widget is null) ? null : widget.getWidgetStruct());
	}

	/** */
	public void resizeChildren()
	{
		gtk_container_resize_children(gtkContainer);
	}

	/**
	 * Sets the border width of the container.
	 *
	 * The border width of a container is the amount of space to leave
	 * around the outside of the container. The only exception to this is
	 * #GtkWindow; because toplevel windows can’t leave space outside,
	 * they leave the space inside. The border is added on all sides of
	 * the container. To add space to only one side, use a specific
	 * #GtkWidget:margin property on the child widget, for example
	 * #GtkWidget:margin-top.
	 *
	 * Params:
	 *     borderWidth = amount of blank space to leave outside
	 *         the container. Valid values are in the range 0-65535 pixels.
	 */
	public void setBorderWidth(uint borderWidth)
	{
		gtk_container_set_border_width(gtkContainer, borderWidth);
	}

	/**
	 * Sets a focus chain, overriding the one computed automatically by GTK+.
	 *
	 * In principle each widget in the chain should be a descendant of the
	 * container, but this is not enforced by this method, since it’s allowed
	 * to set the focus chain before you pack the widgets, or have a widget
	 * in the chain that isn’t always packed. The necessary checks are done
	 * when the focus chain is actually traversed.
	 *
	 * Params:
	 *     focusableWidgets = the new focus chain
	 */
	public void setFocusChain(ListG focusableWidgets)
	{
		gtk_container_set_focus_chain(gtkContainer, (focusableWidgets is null) ? null : focusableWidgets.getListGStruct());
	}

	/**
	 * Sets, or unsets if @child is %NULL, the focused child of @container.
	 *
	 * This function emits the GtkContainer::set_focus_child signal of
	 * @container. Implementations of #GtkContainer can override the
	 * default behaviour by overriding the class closure of this signal.
	 *
	 * This is function is mostly meant to be used by widgets. Applications can use
	 * gtk_widget_grab_focus() to manually set the focus to a specific widget.
	 *
	 * Params:
	 *     child = a #GtkWidget, or %NULL
	 */
	public void setFocusChild(Widget child)
	{
		gtk_container_set_focus_child(gtkContainer, (child is null) ? null : child.getWidgetStruct());
	}

	/**
	 * Hooks up an adjustment to focus handling in a container, so when a child
	 * of the container is focused, the adjustment is scrolled to show that
	 * widget. This function sets the horizontal alignment.
	 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
	 * the adjustment and gtk_container_set_focus_vadjustment() for setting
	 * the vertical adjustment.
	 *
	 * The adjustments have to be in pixel units and in the same coordinate
	 * system as the allocation for immediate children of the container.
	 *
	 * Params:
	 *     adjustment = an adjustment which should be adjusted when the focus is
	 *         moved among the descendents of @container
	 */
	public void setFocusHadjustment(Adjustment adjustment)
	{
		gtk_container_set_focus_hadjustment(gtkContainer, (adjustment is null) ? null : adjustment.getAdjustmentStruct());
	}

	/**
	 * Hooks up an adjustment to focus handling in a container, so when a
	 * child of the container is focused, the adjustment is scrolled to
	 * show that widget. This function sets the vertical alignment. See
	 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
	 * the adjustment and gtk_container_set_focus_hadjustment() for setting
	 * the horizontal adjustment.
	 *
	 * The adjustments have to be in pixel units and in the same coordinate
	 * system as the allocation for immediate children of the container.
	 *
	 * Params:
	 *     adjustment = an adjustment which should be adjusted when the focus
	 *         is moved among the descendents of @container
	 */
	public void setFocusVadjustment(Adjustment adjustment)
	{
		gtk_container_set_focus_vadjustment(gtkContainer, (adjustment is null) ? null : adjustment.getAdjustmentStruct());
	}

	/**
	 * Sets the @reallocate_redraws flag of the container to the given value.
	 *
	 * Containers requesting reallocation redraws get automatically
	 * redrawn if any of their children changed allocation.
	 *
	 * Deprecated: Call gtk_widget_queue_draw() in your size_allocate handler.
	 *
	 * Params:
	 *     needsRedraws = the new value for the container’s @reallocate_redraws flag
	 */
	public void setReallocateRedraws(bool needsRedraws)
	{
		gtk_container_set_reallocate_redraws(gtkContainer, needsRedraws);
	}

	/**
	 * Sets the resize mode for the container.
	 *
	 * The resize mode of a container determines whether a resize request
	 * will be passed to the container’s parent, queued for later execution
	 * or executed immediately.
	 *
	 * Deprecated: Resize modes are deprecated. They aren’t necessary
	 * anymore since frame clocks and might introduce obscure bugs if
	 * used.
	 *
	 * Params:
	 *     resizeMode = the new resize mode
	 */
	public void setResizeMode(GtkResizeMode resizeMode)
	{
		gtk_container_set_resize_mode(gtkContainer, resizeMode);
	}

	/**
	 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
	 */
	public void unsetFocusChain()
	{
		gtk_container_unset_focus_chain(gtkContainer);
	}

	protected class OnAddDelegateWrapper
	{
		static OnAddDelegateWrapper[] listeners;
		void delegate(Widget, Container) dlg;
		gulong handlerId;
		
		this(void delegate(Widget, Container) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}
		
		void remove(OnAddDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/** */
	gulong addOnAdd(void delegate(Widget, Container) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnAddDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"add",
			cast(GCallback)&callBackAdd,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackAddDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackAdd(GtkContainer* containerStruct, GtkWidget* object, OnAddDelegateWrapper wrapper)
	{
		wrapper.dlg(ObjectG.getDObject!(Widget)(object), wrapper.outer);
	}
	
	extern(C) static void callBackAddDestroy(OnAddDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}

	protected class OnCheckResizeDelegateWrapper
	{
		static OnCheckResizeDelegateWrapper[] listeners;
		void delegate(Container) dlg;
		gulong handlerId;
		
		this(void delegate(Container) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}
		
		void remove(OnCheckResizeDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/** */
	gulong addOnCheckResize(void delegate(Container) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnCheckResizeDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"check-resize",
			cast(GCallback)&callBackCheckResize,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackCheckResizeDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackCheckResize(GtkContainer* containerStruct, OnCheckResizeDelegateWrapper wrapper)
	{
		wrapper.dlg(wrapper.outer);
	}
	
	extern(C) static void callBackCheckResizeDestroy(OnCheckResizeDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}

	protected class OnRemoveDelegateWrapper
	{
		static OnRemoveDelegateWrapper[] listeners;
		void delegate(Widget, Container) dlg;
		gulong handlerId;
		
		this(void delegate(Widget, Container) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}
		
		void remove(OnRemoveDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/** */
	gulong addOnRemove(void delegate(Widget, Container) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnRemoveDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"remove",
			cast(GCallback)&callBackRemove,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackRemoveDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackRemove(GtkContainer* containerStruct, GtkWidget* object, OnRemoveDelegateWrapper wrapper)
	{
		wrapper.dlg(ObjectG.getDObject!(Widget)(object), wrapper.outer);
	}
	
	extern(C) static void callBackRemoveDestroy(OnRemoveDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}

	protected class OnSetFocusChildDelegateWrapper
	{
		static OnSetFocusChildDelegateWrapper[] listeners;
		void delegate(Widget, Container) dlg;
		gulong handlerId;
		
		this(void delegate(Widget, Container) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}
		
		void remove(OnSetFocusChildDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/** */
	gulong addOnSetFocusChild(void delegate(Widget, Container) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnSetFocusChildDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"set-focus-child",
			cast(GCallback)&callBackSetFocusChild,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackSetFocusChildDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackSetFocusChild(GtkContainer* containerStruct, GtkWidget* object, OnSetFocusChildDelegateWrapper wrapper)
	{
		wrapper.dlg(ObjectG.getDObject!(Widget)(object), wrapper.outer);
	}
	
	extern(C) static void callBackSetFocusChildDestroy(OnSetFocusChildDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}
}