Graphics.UI.Gtk.General.IconFactory

Manipulating stock icons

Detail

Browse the available stock icons in the list of stock IDs found here. You can also use the gtk-demo application for this purpose.

An icon factory manages a collection of IconSet; a IconSet manages a set of variants of a particular icon (i.e. a IconSet contains variants for different sizes and widget states). Icons in an icon factory are named by a stock ID, which is a simple string identifying the icon. Each Style has a list of IconFactory derived from the current theme; those icon factories are consulted first when searching for an icon. If the theme doesn't set a particular icon, Gtk+ looks for the icon in a list of default icon factories, maintained by iconFactoryAddDefault and iconFactoryRemoveDefault. Applications with icons should add a default icon factory with their icons, which will allow themes to override the icons for the application.

To display an icon, always use styleLookupIconSet on the widget that will display the icon, or the convenience function widgetRenderIcon. These functions take the theme into account when looking up the icon to use for a given stock ID.

Class Hierarchy

| GObject
| +----IconFactory

Types

data IconFactory

Instances

Eq IconFactory

Ord IconFactory

GObjectClass IconFactory

IconFactoryClass IconFactory

class GObjectClass o => IconFactoryClass o

Instances

IconFactoryClass IconFactory

castToIconFactory :: GObjectClass obj => obj -> IconFactory

gTypeIconFactory :: GType

toIconFactory :: IconFactoryClass o => o -> IconFactory

Constructors

iconFactoryNew :: IO IconFactory

Create a new IconFactory.

• An application should create a new IconFactory and add all needed icons. By calling iconFactoryAddDefault these icons become available as stock objects and can easily be displayed by Image. Furthermore, a theme can override the icons defined by the application.

Methods

iconFactoryAdd :: IconFactory -> StockId -> IconSet -> IO ()

Add an IconSet to an IconFactory.

In order to use the new stock object, the factory as to be added to the default factories by iconFactoryAddDefault.

iconFactoryAddDefault :: IconFactory -> IO ()

Add all entries of the IconFactory to the applications stock object database.

iconFactoryLookup :: IconFactory -> StockId -> IO (Maybe IconSet)

Looks up the stock id in the icon factory, returning an icon set if found, otherwise Nothing.

For display to the user, you should use styleLookupIconSet on the Style for the widget that will display the icon, instead of using this function directly, so that themes are taken into account.

iconFactoryLookupDefault :: StockId -> IO (Maybe IconSet)

Looks for an icon in the list of default icon factories.

For display to the user, you should use styleLookupIconSet on the Style for the widget that will display the icon, instead of using this function directly, so that themes are taken into account.

iconFactoryRemoveDefault :: IconFactory -> IO ()

Remove an IconFactory from the application's stock database.

data IconSet

iconSetNew :: IO IconSet

Create a new IconSet.

• Each icon in an application is contained in an IconSet. The IconSet contains several variants (IconSources) to accomodate for different sizes and states.

iconSetNewFromPixbuf :: Pixbuf -> IO IconSet

Creates a new IconSet with the given pixbuf as the default/fallback source image. If you don't add any additional IconSource to the icon set, all variants of the icon will be created from the pixbuf, using scaling, pixelation, etc. as required to adjust the icon size or make the icon look insensitive/prelighted.

iconSetAddSource :: IconSet -> IconSource -> IO ()

Add an IconSource (an Icon with attributes) to an IconSet.

• If an icon is looked up in the IconSet set the best matching IconSource will be taken. It is therefore advisable to add a default (wildcarded) icon, than can be used if no exact match is found.

iconSetRenderIcon :: WidgetClass widget => IconSet -> TextDirection -> StateType -> IconSize -> widget -> IO Pixbuf

iconSetGetSizes :: IconSet -> IO [IconSize]

Obtains a list of icon sizes this icon set can render.

data IconSource

iconSourceNew :: IO IconSource

Create a new IconSource.

• An IconSource is a single image that is usually added to an IconSet. Next to the image it contains information about which state, text direction and size it should apply.

data TextDirection

Constructors

TextDirNone

TextDirLtr

TextDirRtl

Instances

Enum TextDirection

Eq TextDirection

Show TextDirection

iconSourceGetDirection :: IconSource -> IO (Maybe TextDirection)

Retrieve the TextDirection of this IconSource.

• Nothing is returned if no explicit direction was set.

iconSourceSetDirection :: IconSource -> TextDirection -> IO ()

Mark this IconSource that it should only apply to the specified TextDirection.

iconSourceResetDirection :: IconSource -> IO ()

Reset the specific TextDirection set with iconSourceSetDirection.

iconSourceGetFilename :: GlibString string => IconSource -> IO (Maybe string)

Retrieve the filename this IconSource was based on.

• Returns Nothing if the IconSource was generated by a Pixbuf.

iconSourceSetFilename :: GlibFilePath fp => IconSource -> fp -> IO ()

Load an icon picture from this filename.

iconSourceGetPixbuf :: IconSource -> IO (Maybe Pixbuf)

Retrieves the source pixbuf, or Nothing if none is set.

iconSourceSetPixbuf :: IconSource -> Pixbuf -> IO ()

Sets a pixbuf to use as a base image when creating icon variants for IconSet.

iconSourceGetSize :: IconSource -> IO (Maybe IconSize)

Retrieve the IconSize of this IconSource.

• Nothing is returned if no explicit size was set (i.e. this IconSource matches all sizes).

iconSourceSetSize :: IconSource -> IconSize -> IO ()

Set this IconSource to a specific size.

iconSourceResetSize :: IconSource -> IO ()

Reset the IconSize of this IconSource so that is matches anything.

data StateType

Widget states

Constructors

StateNormal

StateActive

StatePrelight

StateSelected

StateInsensitive

Instances

Enum StateType

Eq StateType

Show StateType

iconSourceGetState :: IconSource -> IO (Maybe StateType)

Retrieve the StateType of this IconSource.

• Nothing is returned if the IconSource matches all states.

iconSourceSetState :: IconSource -> StateType -> IO ()

Mark this icon to be used only with this specific state.

iconSourceResetState :: IconSource -> IO ()

Reset the StateType of this IconSource so that is matches anything.

data IconSize

The size of an icon in pixels.

• This enumeration contains one case that is not exported and which is used when new sizes are registered using iconSizeRegister.
• Applying show to this type will reveal the name of the size that is registered with Gtk+.

Constructors

IconSizeInvalid

Don't scale but use any of the available sizes.

IconSizeMenu

Icon size to use in next to menu items in drop-down menus.

IconSizeSmallToolbar

Icon size for small toolbars.

IconSizeLargeToolbar

Icon size for larger toolbars.

IconSizeButton

Icon size for icons in buttons, next to the label.

IconSizeDnd

Icon size for icons in drag-and-drop.

IconSizeDialog

Icon size for icons next to dialog text.

IconSizeUser Int

Instances

Enum IconSize

Eq IconSize

iconSizeCheck :: IconSize -> IO Bool

Check if a given IconSize is registered.

• Useful if your application expects a theme to install a set with a specific size. You can test if this actually happend and use another size if not.

iconSizeRegister

Arguments

:: GlibString string

=> string

the new name of the size

-> Int

the width of the icon

-> Int

the height of the icon

-> IO IconSize

the new icon size

Register a new IconSize.

iconSizeRegisterAlias :: GlibString string => IconSize -> string -> IO ()

Register an additional alias for a name.

iconSizeFromName :: GlibString string => string -> IO IconSize

Lookup an IconSize by name.

• This fixed value iconSizeInvalid is returned if the name was not found.

iconSizeGetName :: GlibString string => IconSize -> IO (Maybe string)

Lookup the name of an IconSize.

• Returns Nothing if the name was not found.