Application -package:gi-gio

The WAI application. Note that, since WAI 3.0, this type is structured in continuation passing style to allow for proper safe resource handling. This was handled in the past via other means (e.g., ResourceT). As a demonstration:

app :: Application
app req respond = bracket_
(putStrLn "Allocating scarce resource")
(putStrLn "Cleaning up")
(respond $ responseLBS status200 [] "Hello World")

The WAI application. Note that, since WAI 3.0, this type is structured in continuation passing style to allow for proper safe resource handling. This was handled in the past via other means (e.g., ResourceT). As a demonstration:

app :: Application
app req respond = bracket_
(putStrLn "Allocating scarce resource")
(putStrLn "Cleaning up")
(respond $ responseLBS status200 [] "Hello World")

This module corresponds to section 3.8.15 (Texture Application) of the OpenGL 2.1 specs.

GtkApplication is a high-level API for writing applications. It supports many aspects of writing a GTK application in a convenient fashion, without enforcing a one-size-fits-all 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 Windows, it is recommended to use it together with ApplicationWindow.

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 applicationSetResourceBasePath). The menu with the ID "menubar" is taken as the application's menubar. Additional menus (most interesting submenus) can be named and accessed via applicationGetMenuById which allows for dynamic population of a part of the menu structure. Note that automatic resource loading uses the resource base path that is set at construction time and will not work if the resource base path is changed at a later time. It is also possible to provide the menubar manually using applicationSetMenubar. 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 iconThemeAddResourcePath for more information. If there is a resource located at gtk/help-overlay.ui which defines a ShortcutsWindow with ID help_overlay then GtkApplication associates an instance of this shortcuts window with each ApplicationWindow and sets up the keyboard accelerator <kbd>Control</kbd>+<kbd>?</kbd> 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

A simple example is available in the GTK source code repository GtkApplication optionally registers with a session manager of the users session (if you set the Application:registerSession property) and offers various functionality related to the session life-cycle. An application can block various ways to end the session with the applicationInhibit 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

• Using GtkApplication
• Getting Started with GTK: Basics

Memory-managed wrapper type.

A high-level API for writing applications. GtkApplication supports many aspects of writing a GTK application in a convenient fashion, without enforcing a one-size-fits-all model. Currently, it 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 Windows, it is recommended to use it together with ApplicationWindow.

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 applicationSetResourceBasePath). The menu with the ID "menubar" is taken as the application's menubar. Additional menus (most interesting submenus) can be named and accessed via applicationGetMenuById which allows for dynamic population of a part of the menu structure. Note that automatic resource loading uses the resource base path that is set at construction time and will not work if the resource base path is changed at a later time. It is also possible to provide the menubar manually using applicationSetMenubar. 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 iconThemeAddResourcePath for more information. If there is a resource located at gtk/help-overlay.ui which defines a ShortcutsWindow with ID help_overlay then GtkApplication associates an instance of this shortcuts window with each ApplicationWindow and sets up the keyboard accelerator <kbd>Control</kbd>+<kbd>?</kbd> to open it. To create a menu item that displays the shortcuts window, associate the item with the action win.show-help-overlay. GtkApplication will also automatically set the application id as the default window icon. Use windowSetDefaultIconName or Window:iconName to override that behavior.

A simple application

A simple example is available in the GTK source code repository GtkApplication optionally registers with a session manager of the users session (if you set the Application:registerSession property) and offers various functionality related to the session life-cycle. An application can block various ways to end the session with the applicationInhibit 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

• Using GtkApplication
• Getting Started with GTK: Basics

Holds information about the current app running on Cloud Foundry. This is returned from current.

Application metadata. The ApplicationId argument to Application data constructor can be written using usual Haskell syntax for String literals, just make sure to enable the OverloadedStrings extension. For the list of defined application IDs, see: https://xiph.org/flac/id.html. Writable optional attribute represented as a Maybe ByteString.

The JSON template for an Application resource. See: application smart constructor.

An Application resource contains the top-level configuration of an App Engine application. See: application smart constructor.

See: application smart constructor.

This is a JSON template for the Application resource. See: application smart constructor.

Complete the definition of the web app begun in App.hs. This is always done in two files for (TH?) reasons.