pub struct FixedLayout { /* private fields */ }
Expand description
FixedLayout
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, FixedLayout
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;
FixedLayout
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.
§Implements
LayoutManagerExt
, [trait@glib::ObjectExt
]
GLib type: GObject with reference counted clone semantics.
Implementations§
source§impl FixedLayout
impl FixedLayout
sourcepub fn new() -> FixedLayout
pub fn new() -> FixedLayout
Trait Implementations§
source§impl Clone for FixedLayout
impl Clone for FixedLayout
source§impl Debug for FixedLayout
impl Debug for FixedLayout
source§impl Default for FixedLayout
impl Default for FixedLayout
source§impl HasParamSpec for FixedLayout
impl HasParamSpec for FixedLayout
type ParamSpec = ParamSpecObject
source§type SetValue = FixedLayout
type SetValue = FixedLayout
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, FixedLayout>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for FixedLayout
impl Hash for FixedLayout
source§impl Ord for FixedLayout
impl Ord for FixedLayout
source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl ParentClassIs for FixedLayout
impl ParentClassIs for FixedLayout
type Parent = LayoutManager
source§impl<OT: ObjectType> PartialEq<OT> for FixedLayout
impl<OT: ObjectType> PartialEq<OT> for FixedLayout
source§impl<OT: ObjectType> PartialOrd<OT> for FixedLayout
impl<OT: ObjectType> PartialOrd<OT> for FixedLayout
source§impl StaticType for FixedLayout
impl StaticType for FixedLayout
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for FixedLayout
impl IsA<LayoutManager> for FixedLayout
Auto Trait Implementations§
impl Freeze for FixedLayout
impl RefUnwindSafe for FixedLayout
impl !Send for FixedLayout
impl !Sync for FixedLayout
impl Unpin for FixedLayout
impl UnwindSafe for FixedLayout
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