GI.Gtk.Objects.CustomLayout

CustomLayout is a convenience type meant to be used as a transition mechanism between GtkWidgets implementing a layout policy, and LayoutManager classes.

A CustomLayout uses closures matching to the old Widget virtual functions for size negotiation, as a convenience API to ease the porting towards the corresponding LayoutManager virtual functions.

Exported types

newtype CustomLayout

Memory-managed wrapper type.

Constructors

CustomLayout (ManagedPtr CustomLayout)

Instances

Eq CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

Methods

(==) :: CustomLayout -> CustomLayout -> Bool

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

IsGValue CustomLayout

Convert CustomLayout to and from GValue with toGValue and fromGValue.

Defined in GI.Gtk.Objects.CustomLayout

Methods

toGValue :: CustomLayout -> IO GValue

fromGValue :: GValue -> IO CustomLayout

ManagedPtrNewtype CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

Methods

toManagedPtr :: CustomLayout -> ManagedPtr CustomLayout

TypedObject CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

Methods

glibType :: IO GType

GObject CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

HasParentTypes CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

type ParentTypes CustomLayout

Defined in GI.Gtk.Objects.CustomLayout

type ParentTypes CustomLayout = '[LayoutManager, Object]

class (GObject o, IsDescendantOf CustomLayout o) => IsCustomLayout o

Type class for types which can be safely cast to CustomLayout, for instance with toCustomLayout.

Instances

(GObject o, IsDescendantOf CustomLayout o) => IsCustomLayout o

Defined in GI.Gtk.Objects.CustomLayout

toCustomLayout :: (MonadIO m, IsCustomLayout o) => o -> m CustomLayout

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

Methods

Overloaded methods

new

customLayoutNew

Arguments

:: (HasCallStack, MonadIO m)

=> Maybe CustomRequestModeFunc

requestMode: a function to retrieve the SizeRequestMode of the widget using the layout; the default request mode is SizeRequestModeConstantSize

-> CustomMeasureFunc

measure: a function to measure the widget using the layout manager

-> CustomAllocateFunc

allocate: a function to allocate the children of the widget using the layout manager

-> m CustomLayout

Returns: the newly created CustomLayout

Creates a new legacy layout manager.

Legacy layout managers map to the old Widget size negotiation virtual functions, and are meant to be used during the transition from layout containers to layout manager delegates.