Graphics.UI.Gtk.General.IconFactory

gtk-0.12.4: Binding to the Gtk+ graphical user interface library.

Portability | portable (depends on GHC)
Stability | provisional
Maintainer | gtk2hs-users@lists.sourceforge.net
Safe Haskell | None

Graphics.UI.Gtk.General.IconFactory

Contents

- Detail
- Class Hierarchy
- Types
- Constructors
- Methods

Description

Manipulating stock icons

Synopsis

- data IconFactory
- class GObjectClass o => IconFactoryClass o
- castToIconFactory :: GObjectClass obj => obj -> IconFactory
- gTypeIconFactory :: GType
- toIconFactory :: IconFactoryClass o => o -> IconFactory
- iconFactoryNew :: IO IconFactory
- iconFactoryAdd :: IconFactory -> StockId -> IconSet -> IO ()
- iconFactoryAddDefault :: IconFactory -> IO ()
- iconFactoryLookup :: IconFactory -> StockId -> IO (Maybe IconSet)
- iconFactoryLookupDefault :: StockId -> IO (Maybe IconSet)
- iconFactoryRemoveDefault :: IconFactory -> IO ()
- data IconSet
- iconSetNew :: IO IconSet
- iconSetNewFromPixbuf :: Pixbuf -> IO IconSet
- iconSetAddSource :: IconSet -> IconSource -> IO ()
- iconSetRenderIcon :: WidgetClass widget => IconSet -> TextDirection -> StateType -> IconSize -> widget -> IO Pixbuf
- iconSetGetSizes :: IconSet -> IO [IconSize]
- data IconSource
- iconSourceNew :: IO IconSource
- data TextDirection
  - = TextDirNone
  - | TextDirLtr
  - | TextDirRtl
- iconSourceGetDirection :: IconSource -> IO (Maybe TextDirection)
- iconSourceSetDirection :: IconSource -> TextDirection -> IO ()
- iconSourceResetDirection :: IconSource -> IO ()
- iconSourceGetFilename :: IconSource -> IO (Maybe String)
- iconSourceSetFilename :: IconSource -> FilePath -> IO ()
- iconSourceGetPixbuf :: IconSource -> IO (Maybe Pixbuf)
- iconSourceSetPixbuf :: IconSource -> Pixbuf -> IO ()
- iconSourceGetSize :: IconSource -> IO (Maybe IconSize)
- iconSourceSetSize :: IconSource -> IconSize -> IO ()
- iconSourceResetSize :: IconSource -> IO ()
- data StateType
  - = StateNormal
  - | StateActive
  - | StatePrelight
  - | StateSelected
  - | StateInsensitive
- iconSourceGetState :: IconSource -> IO (Maybe StateType)
- iconSourceSetState :: IconSource -> StateType -> IO ()
- iconSourceResetState :: IconSource -> IO ()
- data IconSize
  - = IconSizeInvalid
  - | IconSizeMenu
  - | IconSizeSmallToolbar
  - | IconSizeLargeToolbar
  - | IconSizeButton
  - | IconSizeDnd
  - | IconSizeDialog
  - | IconSizeUser Int
- iconSizeCheck :: IconSize -> IO Bool
- iconSizeRegister :: String -> Int -> Int -> IO IconSize
- iconSizeRegisterAlias :: IconSize -> String -> IO ()
- iconSizeFromName :: String -> IO IconSize
- iconSizeGetName :: IconSize -> IO (Maybe String)

# 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 (`IconSource`s) 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 :: IconSource -> IO (Maybe String)

Retrieve the filename this IconSource was based on.

- Returns `Nothing` if the IconSource was generated by a Pixbuf.

iconSourceSetFilename :: IconSource -> FilePath -> 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 |
Show 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

:: 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 :: IconSize -> String -> IO ()

Register an additional alias for a name.

iconSizeFromName :: String -> IO IconSize

Lookup an IconSize by name.

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

iconSizeGetName :: IconSize -> IO (Maybe String)

Lookup the name of an IconSize.

- Returns `Nothing` if the name was not found.