GI.Gtk.Objects.FixedLayout

GtkFixedLayout is a layout manager which can place child widgets at fixed positions.

Most applications should never use this layout manager; fixed positioning and sizing requires constant recalculations on where children need to be positioned and sized. Other layout managers perform this kind of work internally so that application developers don't need to do it. Specifically, widgets positioned in a fixed layout manager will need to take into account:

• Themes, which may change widget sizes.
• Fonts other than the one you used to write the app will of course change the size of widgets containing text; keep in mind that users may use a larger font because of difficulty reading the default, or they may be using a different OS that provides different fonts.
• Translation of text into other languages changes its size. Also, display of non-English text will use a different font in many cases.

In addition, GtkFixedLayout does not pay attention to text direction and thus may produce unwanted results if your app is run under right-to-left languages such as Hebrew or Arabic. That is: normally GTK will order containers appropriately depending on the text direction, e.g. to put labels to the right of the thing they label when using an RTL language; GtkFixedLayout won't be able to do that for you.

Finally, fixed positioning makes it kind of annoying to add/remove UI elements, since you have to reposition all the other elements. This is a long-term maintenance problem for your application.

Exported types

newtype FixedLayout

Memory-managed wrapper type.

Constructors

FixedLayout (ManagedPtr FixedLayout)

Instances

Eq FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

Methods

(==) :: FixedLayout -> FixedLayout -> Bool

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

GObject FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

ManagedPtrNewtype FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

Methods

toManagedPtr :: FixedLayout -> ManagedPtr FixedLayout

TypedObject FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

Methods

glibType :: IO GType

HasParentTypes FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

IsGValue (Maybe FixedLayout)

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

Defined in GI.Gtk.Objects.FixedLayout

Methods

gvalueGType_ :: IO GType

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

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

type ParentTypes FixedLayout

Defined in GI.Gtk.Objects.FixedLayout

type ParentTypes FixedLayout = '[LayoutManager, Object]

class (GObject o, IsDescendantOf FixedLayout o) => IsFixedLayout o

Type class for types which can be safely cast to FixedLayout, for instance with toFixedLayout.

Instances

(GObject o, IsDescendantOf FixedLayout o) => IsFixedLayout o

Defined in GI.Gtk.Objects.FixedLayout

toFixedLayout :: (MonadIO m, IsFixedLayout o) => o -> m FixedLayout

Cast to FixedLayout, 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

allocate, bindProperty, bindPropertyFull, forceFloating, freezeNotify, getv, isFloating, layoutChanged, measure, notify, notifyByPspec, ref, refSink, runDispose, stealData, stealQdata, thawNotify, unref, watchClosure.

Getters

getData, getLayoutChild, getProperty, getQdata, getRequestMode, getWidget.

Setters

setData, setDataFull, setProperty.

new

fixedLayoutNew

Arguments

:: (HasCallStack, MonadIO m)

=> m FixedLayout

Returns: the newly created GtkFixedLayout

Creates a new GtkFixedLayout.