GI.Gdk.Objects.CairoContext

GdkCairoContext is an object representing the platform-specific draw context.

GdkCairoContexts are created for a surface using surfaceCreateCairoContext, and the context can then be used to draw on that surface.

Exported types

newtype CairoContext

Memory-managed wrapper type.

Constructors

CairoContext (ManagedPtr CairoContext)

Instances

Eq CairoContext

Defined in GI.Gdk.Objects.CairoContext

Methods

(==) :: CairoContext -> CairoContext -> Bool

(/=) :: CairoContext -> CairoContext -> Bool

GObject CairoContext

Defined in GI.Gdk.Objects.CairoContext

ManagedPtrNewtype CairoContext

Defined in GI.Gdk.Objects.CairoContext

Methods

toManagedPtr :: CairoContext -> ManagedPtr CairoContext

TypedObject CairoContext

Defined in GI.Gdk.Objects.CairoContext

Methods

glibType :: IO GType

HasParentTypes CairoContext

Defined in GI.Gdk.Objects.CairoContext

IsGValue (Maybe CairoContext)

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

Defined in GI.Gdk.Objects.CairoContext

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe CairoContext -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe CairoContext)

type ParentTypes CairoContext

Defined in GI.Gdk.Objects.CairoContext

type ParentTypes CairoContext = '[DrawContext, Object]

class (GObject o, IsDescendantOf CairoContext o) => IsCairoContext o

Type class for types which can be safely cast to CairoContext, for instance with toCairoContext.

Instances

(GObject o, IsDescendantOf CairoContext o) => IsCairoContext o

Defined in GI.Gdk.Objects.CairoContext

toCairoContext :: (MonadIO m, IsCairoContext o) => o -> m CairoContext

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

Methods

Click to display all available methods, including inherited ones

Methods

beginFrame, bindProperty, bindPropertyFull, cairoCreate, endFrame, forceFloating, freezeNotify, getv, isFloating, isInFrame, notify, notifyByPspec, ref, refSink, runDispose, stealData, stealQdata, thawNotify, unref, watchClosure.

Getters

getData, getDisplay, getFrameRegion, getProperty, getQdata, getSurface.

Setters

setData, setDataFull, setProperty.

cairoCreate

cairoContextCairoCreate

Arguments

:: (HasCallStack, MonadIO m, IsCairoContext a)

=> a

self: a GdkCairoContext that is currently drawing

-> m (Maybe Context)

Returns: a Cairo context to draw on `GdkSurface

Retrieves a Cairo context to be used to draw on the GdkSurface of context.

A call to drawContextBeginFrame with this context must have been done or this function will return Nothing.

The returned context is guaranteed to be valid until drawContextEndFrame is called.