/*
 * 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.Application;

private import gio.ActionGroupIF;
private import gio.ActionGroupT;
private import gio.ActionMapIF;
private import gio.ActionMapT;
private import gio.Application : GioApplication = Application;
private import gio.Menu;
private import gio.MenuModel;
private import glib.ConstructionException;
private import glib.ListG;
private import glib.Str;
private import glib.Variant;
private import gobject.ObjectG;
private import gobject.Signals;
private import gtk.Window;
private import gtkc.gtk;
public  import gtkc.gtktypes;
private import std.algorithm;


/**
 * #GtkApplication is a class that handles many important aspects
 * of a GTK+ application in a convenient fashion, without enforcing
 * a one-size-fits-all application model.
 * 
 * Currently, GtkApplication handles GTK+ initialization, application
 * uniqueness, session management, provides some basic scriptability and
 * desktop shell integration by exporting actions and menus and manages a
 * list of toplevel windows whose life-cycle is automatically tied to the
 * life-cycle of your application.
 * 
 * While GtkApplication works fine with plain #GtkWindows, it is recommended
 * to use it together with #GtkApplicationWindow.
 * 
 * When GDK threads are enabled, GtkApplication will acquire the GDK
 * lock when invoking actions that arrive from other processes.  The GDK
 * lock is not touched for local action invocations.  In order to have
 * actions invoked in a predictable context it is therefore recommended
 * that the GDK lock be held while invoking actions locally with
 * g_action_group_activate_action().  The same applies to actions
 * associated with #GtkApplicationWindow and to the “activate” and
 * “open” #GApplication methods.
 * 
 * ## Automatic resources ## {#automatic-resources}
 * 
 * #GtkApplication will automatically load menus from the #GtkBuilder
 * resource located at "gtk/menus.ui", relative to the application's
 * resource base path (see g_application_set_resource_base_path()).  The
 * menu with the ID "app-menu" is taken as the application's app menu
 * and the menu with the ID "menubar" is taken as the application's
 * menubar.  Additional menus (most interesting submenus) can be named
 * and accessed via gtk_application_get_menu_by_id() which allows for
 * dynamic population of a part of the menu structure.
 * 
 * If the resources "gtk/menus-appmenu.ui" or "gtk/menus-traditional.ui" are
 * present then these files will be used in preference, depending on the value
 * of gtk_application_prefers_app_menu(). If the resource "gtk/menus-common.ui"
 * is present it will be loaded as well. This is useful for storing items that
 * are referenced from both "gtk/menus-appmenu.ui" and
 * "gtk/menus-traditional.ui".
 * 
 * It is also possible to provide the menus manually using
 * gtk_application_set_app_menu() and gtk_application_set_menubar().
 * 
 * #GtkApplication will also automatically setup an icon search path for
 * the default icon theme by appending "icons" to the resource base
 * path.  This allows your application to easily store its icons as
 * resources.  See gtk_icon_theme_add_resource_path() for more
 * information.
 * 
 * If there is a resource located at "gtk/help-overlay.ui" which
 * defines a #GtkShortcutsWindow with ID "help_overlay" then GtkApplication
 * associates an instance of this shortcuts window with each
 * #GtkApplicationWindow and sets up keyboard accelerators (Control-F1
 * and Control-?) to open it. To create a menu item that displays the
 * shortcuts window, associate the item with the action win.show-help-overlay.
 * 
 * ## A simple application ## {#gtkapplication}
 * 
 * [A simple example](https://git.gnome.org/browse/gtk+/tree/examples/bp/bloatpad.c)
 * 
 * GtkApplication optionally registers with a session manager
 * of the users session (if you set the #GtkApplication:register-session
 * property) and offers various functionality related to the session
 * life-cycle.
 * 
 * An application can block various ways to end the session with
 * the gtk_application_inhibit() function. Typical use cases for
 * this kind of inhibiting are long-running, uninterruptible operations,
 * such as burning a CD or performing a disk backup. The session
 * manager may not honor the inhibitor, but it can be expected to
 * inform the user about the negative consequences of ending the
 * session while inhibitors are present.
 * 
 * ## See Also ## {#seealso}
 * [HowDoI: Using GtkApplication](https://wiki.gnome.org/HowDoI/GtkApplication),
 * [Getting Started with GTK+: Basics](https://developer.gnome.org/gtk3/stable/gtk-getting-started.html#id-1.2.3.3)
 */
public class Application : GioApplication
{
	/** the main Gtk struct */
	protected GtkApplication* gtkApplication;

	/** Get the main Gtk struct */
	public GtkApplication* getGtkApplicationStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gtkApplication;
	}

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

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

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

	/**
	 * Sets zero or more keyboard accelerators that will trigger the
	 * given action. The first item in accels will be the primary
	 * accelerator, which may be displayed in the UI.
	 *
	 * To remove all accelerators for an action, use an empty
	 * array for accels.
	 *
	 * Params:
	 *     detailedActionName = a detailed action name, specifying an action
	 *         and target to associate accelerators with
	 *     accels = a list of accelerators in the format
	 *         understood by gtk_accelerator_parse()
	 *
	 * Since: 3.12
	 */
	public void setAccelsForAction(string detailedActionName, string[] accels)
	{
		char** accel;
		
		if (accels)
			accel = Str.toStringzArray(accels);
		else
			accel = [cast(char*)null].ptr;
		
		gtk_application_set_accels_for_action(gtkApplication, Str.toStringz(detailedActionName), accel);
	}

	/**
	 */

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

	/**
	 * Creates a new #GtkApplication instance.
	 *
	 * When using #GtkApplication, it is not necessary to call gtk_init()
	 * manually. It is called as soon as the application gets registered as
	 * the primary instance.
	 *
	 * Concretely, gtk_init() is called in the default handler for the
	 * #GApplication::startup signal. Therefore, #GtkApplication subclasses should
	 * chain up in their #GApplication::startup handler before using any GTK+ API.
	 *
	 * Note that commandline arguments are not passed to gtk_init().
	 * All GTK+ functionality that is available via commandline arguments
	 * can also be achieved by setting suitable environment variables
	 * such as `G_DEBUG`, so this should not be a big
	 * problem. If you absolutely must support GTK+ commandline arguments,
	 * you can explicitly call gtk_init() before creating the application
	 * instance.
	 *
	 * If non-%NULL, the application ID must be valid.  See
	 * g_application_id_is_valid().
	 *
	 * If no application ID is given then some features (most notably application
	 * uniqueness) will be disabled. A null application ID is only allowed with
	 * GTK+ 3.6 or later.
	 *
	 * Params:
	 *     applicationId = The application ID.
	 *     flags = the application flags
	 *
	 * Returns: a new #GtkApplication instance
	 *
	 * Since: 3.0
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(string applicationId, GApplicationFlags flags)
	{
		auto p = gtk_application_new(Str.toStringz(applicationId), flags);
		
		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}
		
		this(cast(GtkApplication*) p, true);
	}

	/**
	 * Installs an accelerator that will cause the named action
	 * to be activated when the key combination specificed by @accelerator
	 * is pressed.
	 *
	 * @accelerator must be a string that can be parsed by gtk_accelerator_parse(),
	 * e.g. "<Primary>q" or “<Control><Alt>p”.
	 *
	 * @action_name must be the name of an action as it would be used
	 * in the app menu, i.e. actions that have been added to the application
	 * are referred to with an “app.” prefix, and window-specific actions
	 * with a “win.” prefix.
	 *
	 * GtkApplication also extracts accelerators out of “accel” attributes
	 * in the #GMenuModels passed to gtk_application_set_app_menu() and
	 * gtk_application_set_menubar(), which is usually more convenient
	 * than calling this function for each accelerator.
	 *
	 * Deprecated: Use gtk_application_set_accels_for_action() instead
	 *
	 * Params:
	 *     accelerator = accelerator string
	 *     actionName = the name of the action to activate
	 *     parameter = parameter to pass when activating the action,
	 *         or %NULL if the action does not accept an activation parameter
	 *
	 * Since: 3.4
	 */
	public void addAccelerator(string accelerator, string actionName, Variant parameter)
	{
		gtk_application_add_accelerator(gtkApplication, Str.toStringz(accelerator), Str.toStringz(actionName), (parameter is null) ? null : parameter.getVariantStruct());
	}

	/**
	 * Adds a window to @application.
	 *
	 * This call can only happen after the @application has started;
	 * typically, you should add new application windows in response
	 * to the emission of the #GApplication::activate signal.
	 *
	 * This call is equivalent to setting the #GtkWindow:application
	 * property of @window to @application.
	 *
	 * Normally, the connection between the application and the window
	 * will remain until the window is destroyed, but you can explicitly
	 * remove it with gtk_application_remove_window().
	 *
	 * GTK+ will keep the @application running as long as it has
	 * any windows.
	 *
	 * Params:
	 *     window = a #GtkWindow
	 *
	 * Since: 3.0
	 */
	public void addWindow(Window window)
	{
		gtk_application_add_window(gtkApplication, (window is null) ? null : window.getWindowStruct());
	}

	/**
	 * Gets the accelerators that are currently associated with
	 * the given action.
	 *
	 * Params:
	 *     detailedActionName = a detailed action name, specifying an action
	 *         and target to obtain accelerators for
	 *
	 * Returns: accelerators for @detailed_action_name, as
	 *     a %NULL-terminated array. Free with g_strfreev() when no longer needed
	 *
	 * Since: 3.12
	 */
	public string[] getAccelsForAction(string detailedActionName)
	{
		auto retStr = gtk_application_get_accels_for_action(gtkApplication, Str.toStringz(detailedActionName));
		
		scope(exit) Str.freeStringArray(retStr);
		return Str.toStringArray(retStr);
	}

	/**
	 * Returns the list of actions (possibly empty) that @accel maps to.
	 * Each item in the list is a detailed action name in the usual form.
	 *
	 * This might be useful to discover if an accel already exists in
	 * order to prevent installation of a conflicting accelerator (from
	 * an accelerator editor or a plugin system, for example). Note that
	 * having more than one action per accelerator may not be a bad thing
	 * and might make sense in cases where the actions never appear in the
	 * same context.
	 *
	 * In case there are no actions for a given accelerator, an empty array
	 * is returned.  %NULL is never returned.
	 *
	 * It is a programmer error to pass an invalid accelerator string.
	 * If you are unsure, check it with gtk_accelerator_parse() first.
	 *
	 * Params:
	 *     accel = an accelerator that can be parsed by gtk_accelerator_parse()
	 *
	 * Returns: a %NULL-terminated array of actions for @accel
	 *
	 * Since: 3.14
	 */
	public string[] getActionsForAccel(string accel)
	{
		auto retStr = gtk_application_get_actions_for_accel(gtkApplication, Str.toStringz(accel));
		
		scope(exit) Str.freeStringArray(retStr);
		return Str.toStringArray(retStr);
	}

	/**
	 * Gets the “active” window for the application.
	 *
	 * The active window is the one that was most recently focused (within
	 * the application).  This window may not have the focus at the moment
	 * if another application has it — this is just the most
	 * recently-focused window within this application.
	 *
	 * Returns: the active window
	 *
	 * Since: 3.6
	 */
	public Window getActiveWindow()
	{
		auto p = gtk_application_get_active_window(gtkApplication);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Window)(cast(GtkWindow*) p);
	}

	/**
	 * Returns the menu model that has been set with
	 * gtk_application_set_app_menu().
	 *
	 * Returns: the application menu of @application
	 *     or %NULL if no application menu has been set.
	 *
	 * Since: 3.4
	 */
	public MenuModel getAppMenu()
	{
		auto p = gtk_application_get_app_menu(gtkApplication);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(MenuModel)(cast(GMenuModel*) p);
	}

	/**
	 * Gets a menu from automatically loaded resources.
	 * See [Automatic resources][automatic-resources]
	 * for more information.
	 *
	 * Params:
	 *     id = the id of the menu to look up
	 *
	 * Returns: Gets the menu with the
	 *     given id from the automatically loaded resources
	 *
	 * Since: 3.14
	 */
	public Menu getMenuById(string id)
	{
		auto p = gtk_application_get_menu_by_id(gtkApplication, Str.toStringz(id));
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Menu)(cast(GMenu*) p);
	}

	/**
	 * Returns the menu model that has been set with
	 * gtk_application_set_menubar().
	 *
	 * Returns: the menubar for windows of @application
	 *
	 * Since: 3.4
	 */
	public MenuModel getMenubar()
	{
		auto p = gtk_application_get_menubar(gtkApplication);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(MenuModel)(cast(GMenuModel*) p);
	}

	/**
	 * Returns the #GtkApplicationWindow with the given ID.
	 *
	 * The ID of a #GtkApplicationWindow can be retrieved with
	 * gtk_application_window_get_id().
	 *
	 * Params:
	 *     id = an identifier number
	 *
	 * Returns: the window with ID @id, or
	 *     %NULL if there is no window with this ID
	 *
	 * Since: 3.6
	 */
	public Window getWindowById(uint id)
	{
		auto p = gtk_application_get_window_by_id(gtkApplication, id);
		
		if(p is null)
		{
			return null;
		}
		
		return ObjectG.getDObject!(Window)(cast(GtkWindow*) p);
	}

	/**
	 * Gets a list of the #GtkWindows associated with @application.
	 *
	 * The list is sorted by most recently focused window, such that the first
	 * element is the currently focused window. (Useful for choosing a parent
	 * for a transient window.)
	 *
	 * The list that is returned should not be modified in any way. It will
	 * only remain valid until the next focus change or window creation or
	 * deletion.
	 *
	 * Returns: a #GList of #GtkWindow
	 *
	 * Since: 3.0
	 */
	public ListG getWindows()
	{
		auto p = gtk_application_get_windows(gtkApplication);
		
		if(p is null)
		{
			return null;
		}
		
		return new ListG(cast(GList*) p);
	}

	/**
	 * Inform the session manager that certain types of actions should be
	 * inhibited. This is not guaranteed to work on all platforms and for
	 * all types of actions.
	 *
	 * Applications should invoke this method when they begin an operation
	 * that should not be interrupted, such as creating a CD or DVD. The
	 * types of actions that may be blocked are specified by the @flags
	 * parameter. When the application completes the operation it should
	 * call gtk_application_uninhibit() to remove the inhibitor. Note that
	 * an application can have multiple inhibitors, and all of them must
	 * be individually removed. Inhibitors are also cleared when the
	 * application exits.
	 *
	 * Applications should not expect that they will always be able to block
	 * the action. In most cases, users will be given the option to force
	 * the action to take place.
	 *
	 * Reasons should be short and to the point.
	 *
	 * If @window is given, the session manager may point the user to
	 * this window to find out more about why the action is inhibited.
	 *
	 * Params:
	 *     window = a #GtkWindow, or %NULL
	 *     flags = what types of actions should be inhibited
	 *     reason = a short, human-readable string that explains
	 *         why these operations are inhibited
	 *
	 * Returns: A non-zero cookie that is used to uniquely identify this
	 *     request. It should be used as an argument to gtk_application_uninhibit()
	 *     in order to remove the request. If the platform does not support
	 *     inhibiting or the request failed for some reason, 0 is returned.
	 *
	 * Since: 3.4
	 */
	public uint inhibit(Window window, GtkApplicationInhibitFlags flags, string reason)
	{
		return gtk_application_inhibit(gtkApplication, (window is null) ? null : window.getWindowStruct(), flags, Str.toStringz(reason));
	}

	/**
	 * Determines if any of the actions specified in @flags are
	 * currently inhibited (possibly by another application).
	 *
	 * Params:
	 *     flags = what types of actions should be queried
	 *
	 * Returns: %TRUE if any of the actions specified in @flags are inhibited
	 *
	 * Since: 3.4
	 */
	public bool isInhibited(GtkApplicationInhibitFlags flags)
	{
		return gtk_application_is_inhibited(gtkApplication, flags) != 0;
	}

	/**
	 * Lists the detailed action names which have associated accelerators.
	 * See gtk_application_set_accels_for_action().
	 *
	 * Returns: a %NULL-terminated array of strings,
	 *     free with g_strfreev() when done
	 *
	 * Since: 3.12
	 */
	public string[] listActionDescriptions()
	{
		auto retStr = gtk_application_list_action_descriptions(gtkApplication);
		
		scope(exit) Str.freeStringArray(retStr);
		return Str.toStringArray(retStr);
	}

	/**
	 * Determines if the desktop environment in which the application is
	 * running would prefer an application menu be shown.
	 *
	 * If this function returns %TRUE then the application should call
	 * gtk_application_set_app_menu() with the contents of an application
	 * menu, which will be shown by the desktop environment.  If it returns
	 * %FALSE then you should consider using an alternate approach, such as
	 * a menubar.
	 *
	 * The value returned by this function is purely advisory and you are
	 * free to ignore it.  If you call gtk_application_set_app_menu() even
	 * if the desktop environment doesn't support app menus, then a fallback
	 * will be provided.
	 *
	 * Applications are similarly free not to set an app menu even if the
	 * desktop environment wants to show one.  In that case, a fallback will
	 * also be created by the desktop environment (GNOME, for example, uses
	 * a menu with only a "Quit" item in it).
	 *
	 * The value returned by this function never changes.  Once it returns a
	 * particular value, it is guaranteed to always return the same value.
	 *
	 * You may only call this function after the application has been
	 * registered and after the base startup handler has run.  You're most
	 * likely to want to use this from your own startup handler.  It may
	 * also make sense to consult this function while constructing UI (in
	 * activate, open or an action activation handler) in order to determine
	 * if you should show a gear menu or not.
	 *
	 * This function will return %FALSE on Mac OS and a default app menu
	 * will be created automatically with the "usual" contents of that menu
	 * typical to most Mac OS applications.  If you call
	 * gtk_application_set_app_menu() anyway, then this menu will be
	 * replaced with your own.
	 *
	 * Returns: %TRUE if you should set an app menu
	 *
	 * Since: 3.14
	 */
	public bool prefersAppMenu()
	{
		return gtk_application_prefers_app_menu(gtkApplication) != 0;
	}

	/**
	 * Removes an accelerator that has been previously added
	 * with gtk_application_add_accelerator().
	 *
	 * Deprecated: Use gtk_application_set_accels_for_action() instead
	 *
	 * Params:
	 *     actionName = the name of the action to activate
	 *     parameter = parameter to pass when activating the action,
	 *         or %NULL if the action does not accept an activation parameter
	 *
	 * Since: 3.4
	 */
	public void removeAccelerator(string actionName, Variant parameter)
	{
		gtk_application_remove_accelerator(gtkApplication, Str.toStringz(actionName), (parameter is null) ? null : parameter.getVariantStruct());
	}

	/**
	 * Remove a window from @application.
	 *
	 * If @window belongs to @application then this call is equivalent to
	 * setting the #GtkWindow:application property of @window to
	 * %NULL.
	 *
	 * The application may stop running as a result of a call to this
	 * function.
	 *
	 * Params:
	 *     window = a #GtkWindow
	 *
	 * Since: 3.0
	 */
	public void removeWindow(Window window)
	{
		gtk_application_remove_window(gtkApplication, (window is null) ? null : window.getWindowStruct());
	}

	/**
	 * Sets or unsets the application menu for @application.
	 *
	 * This can only be done in the primary instance of the application,
	 * after it has been registered.  #GApplication::startup is a good place
	 * to call this.
	 *
	 * The application menu is a single menu containing items that typically
	 * impact the application as a whole, rather than acting on a specific
	 * window or document.  For example, you would expect to see
	 * “Preferences” or “Quit” in an application menu, but not “Save” or
	 * “Print”.
	 *
	 * If supported, the application menu will be rendered by the desktop
	 * environment.
	 *
	 * Use the base #GActionMap interface to add actions, to respond to the user
	 * selecting these menu items.
	 *
	 * Params:
	 *     appMenu = a #GMenuModel, or %NULL
	 *
	 * Since: 3.4
	 */
	public void setAppMenu(MenuModel appMenu)
	{
		gtk_application_set_app_menu(gtkApplication, (appMenu is null) ? null : appMenu.getMenuModelStruct());
	}

	/**
	 * Sets or unsets the menubar for windows of @application.
	 *
	 * This is a menubar in the traditional sense.
	 *
	 * This can only be done in the primary instance of the application,
	 * after it has been registered.  #GApplication::startup is a good place
	 * to call this.
	 *
	 * Depending on the desktop environment, this may appear at the top of
	 * each window, or at the top of the screen.  In some environments, if
	 * both the application menu and the menubar are set, the application
	 * menu will be presented as if it were the first item of the menubar.
	 * Other environments treat the two as completely separate — for example,
	 * the application menu may be rendered by the desktop shell while the
	 * menubar (if set) remains in each individual window.
	 *
	 * Use the base #GActionMap interface to add actions, to respond to the
	 * user selecting these menu items.
	 *
	 * Params:
	 *     menubar = a #GMenuModel, or %NULL
	 *
	 * Since: 3.4
	 */
	public void setMenubar(MenuModel menubar)
	{
		gtk_application_set_menubar(gtkApplication, (menubar is null) ? null : menubar.getMenuModelStruct());
	}

	/**
	 * Removes an inhibitor that has been established with gtk_application_inhibit().
	 * Inhibitors are also cleared when the application exits.
	 *
	 * Params:
	 *     cookie = a cookie that was returned by gtk_application_inhibit()
	 *
	 * Since: 3.4
	 */
	public void uninhibit(uint cookie)
	{
		gtk_application_uninhibit(gtkApplication, cookie);
	}

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

	/**
	 * Emitted when a #GtkWindow is added to @application through
	 * gtk_application_add_window().
	 *
	 * Params:
	 *     window = the newly-added #GtkWindow
	 *
	 * Since: 3.2
	 */
	gulong addOnWindowAdded(void delegate(Window, Application) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnWindowAddedDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"window-added",
			cast(GCallback)&callBackWindowAdded,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackWindowAddedDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackWindowAdded(GtkApplication* applicationStruct, GtkWindow* window, OnWindowAddedDelegateWrapper wrapper)
	{
		wrapper.dlg(ObjectG.getDObject!(Window)(window), wrapper.outer);
	}
	
	extern(C) static void callBackWindowAddedDestroy(OnWindowAddedDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}

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

	/**
	 * Emitted when a #GtkWindow is removed from @application,
	 * either as a side-effect of being destroyed or explicitly
	 * through gtk_application_remove_window().
	 *
	 * Params:
	 *     window = the #GtkWindow that is being removed
	 *
	 * Since: 3.2
	 */
	gulong addOnWindowRemoved(void delegate(Window, Application) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnWindowRemovedDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"window-removed",
			cast(GCallback)&callBackWindowRemoved,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackWindowRemovedDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackWindowRemoved(GtkApplication* applicationStruct, GtkWindow* window, OnWindowRemovedDelegateWrapper wrapper)
	{
		wrapper.dlg(ObjectG.getDObject!(Window)(window), wrapper.outer);
	}
	
	extern(C) static void callBackWindowRemovedDestroy(OnWindowRemovedDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}
}