gi-pango-1.0.25: Pango bindings
CopyrightWill Thompson and Iñaki García Etxebarria
LicenseLGPL-2.1
MaintainerIñaki García Etxebarria
Safe HaskellSafe-Inferred
LanguageHaskell2010

GI.Pango.Objects.FontMap

Description

A PangoFontMap represents the set of fonts available for a particular rendering system.

This is a virtual object with implementations being specific to particular rendering systems.

Synopsis

Exported types

newtype FontMap Source #

Memory-managed wrapper type.

Constructors

FontMap (ManagedPtr FontMap) 

Instances

Instances details
Eq FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

Methods

(==) :: FontMap -> FontMap -> Bool #

(/=) :: FontMap -> FontMap -> Bool #

GObject FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

ManagedPtrNewtype FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

TypedObject FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

Methods

glibType :: IO GType #

HasParentTypes FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

IsGValue (Maybe FontMap) Source #

Convert FontMap to and from GValue. See toGValue and fromGValue.

Instance details

Defined in GI.Pango.Objects.FontMap

type ParentTypes FontMap Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

class (GObject o, IsDescendantOf FontMap o) => IsFontMap o Source #

Type class for types which can be safely cast to FontMap, for instance with toFontMap.

Instances

Instances details
(GObject o, IsDescendantOf FontMap o) => IsFontMap o Source # 
Instance details

Defined in GI.Pango.Objects.FontMap

toFontMap :: (MonadIO m, IsFontMap o) => o -> m FontMap Source #

Cast to FontMap, for types for which this is known to be safe. For general casts, use castTo.

Methods

changed

fontMapChanged Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a) 
=> a

fontmap: a PangoFontMap

-> m () 

Forces a change in the context, which will cause any PangoContext using this fontmap to change.

This function is only useful when implementing a new backend for Pango, something applications won't do. Backends should call this function if they have attached extra data to the context and such data is changed.

Since: 1.34

createContext

fontMapCreateContext Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a) 
=> a

fontmap: a PangoFontMap

-> m Context

Returns: the newly allocated PangoContext, which should be freed with objectUnref.

Creates a PangoContext connected to fontmap.

This is equivalent to contextNew followed by contextSetFontMap.

If you are using Pango as part of a higher-level system, that system may have it's own way of create a PangoContext. For instance, the GTK toolkit has, among others, gtk_widget_get_pango_context(). Use those instead.

Since: 1.22

getFamily

fontMapGetFamily Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a) 
=> a

fontmap: a PangoFontMap

-> Text

name: a family name

-> m FontFamily

Returns: the PangoFontFamily

Gets a font family by name.

Since: 1.46

getSerial

fontMapGetSerial Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a) 
=> a

fontmap: a PangoFontMap

-> m Word32

Returns: The current serial number of fontmap.

Returns the current serial number of fontmap.

The serial number is initialized to an small number larger than zero when a new fontmap is created and is increased whenever the fontmap is changed. It may wrap, but will never have the value 0. Since it can wrap, never compare it with "less than", always use "not equals".

The fontmap can only be changed using backend-specific API, like changing fontmap resolution.

This can be used to automatically detect changes to a PangoFontMap, like in PangoContext.

Since: 1.32.4

listFamilies

fontMapListFamilies Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a) 
=> a

fontmap: a PangoFontMap

-> m [FontFamily] 

List all families for a fontmap.

loadFont

fontMapLoadFont Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a, IsContext b) 
=> a

fontmap: a PangoFontMap

-> b

context: the PangoContext the font will be used with

-> FontDescription

desc: a PangoFontDescription describing the font to load

-> m (Maybe Font)

Returns: the newly allocated PangoFont loaded, or Nothing if no font matched.

Load the font in the fontmap that is the closest match for desc.

loadFontset

fontMapLoadFontset Source #

Arguments

:: (HasCallStack, MonadIO m, IsFontMap a, IsContext b) 
=> a

fontmap: a PangoFontMap

-> b

context: the PangoContext the font will be used with

-> FontDescription

desc: a PangoFontDescription describing the font to load

-> Language

language: a PangoLanguage the fonts will be used for

-> m (Maybe Fontset)

Returns: the newly allocated PangoFontset loaded, or Nothing if no font matched.

Load a set of fonts in the fontmap that can be used to render a font matching desc.