#[repr(transparent)]pub struct Fixed { /* private fields */ }
Expand description
Fixed
places its child widgets at fixed positions and with fixed sizes.
Fixed
performs no automatic layout management.
For most applications, you should not use this container! It keeps
you from having to learn about the other GTK containers, but it
results in broken applications. With Fixed
, the following
things will result in truncated text, overlapping widgets, and
other display bugs:
-
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, Fixed
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 for the text direction, e.g. to put labels to
the right of the thing they label when using an RTL language, but it can’t
do that with Fixed
. So if you need to reorder widgets depending on
the text direction, you would need to manually detect it and adjust child
positions accordingly.
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.
If you know none of these things are an issue for your application,
and prefer the simplicity of Fixed
, by all means use the
widget. But you should be aware of the tradeoffs.
Implements
FixedExt
, WidgetExt
, glib::ObjectExt
, AccessibleExt
, BuildableExt
, ConstraintTargetExt
, WidgetExtManual
, AccessibleExtManual
Implementations§
Trait Implementations§
source§impl HasParamSpec for Fixed
impl HasParamSpec for Fixed
source§impl<T: FixedImpl> IsSubclassable<T> for Fixed
impl<T: FixedImpl> IsSubclassable<T> for Fixed
source§fn class_init(class: &mut Class<Self>)
fn class_init(class: &mut Class<Self>)
source§fn instance_init(instance: &mut InitializingObject<T>)
fn instance_init(instance: &mut InitializingObject<T>)
source§impl Ord for Fixed
impl Ord for Fixed
source§impl<OT: ObjectType> PartialEq<OT> for Fixed
impl<OT: ObjectType> PartialEq<OT> for Fixed
source§impl<OT: ObjectType> PartialOrd<OT> for Fixed
impl<OT: ObjectType> PartialOrd<OT> for Fixed
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for Fixed
impl StaticType for Fixed
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Fixed
impl IsA<Accessible> for Fixed
impl IsA<Buildable> for Fixed
impl IsA<ConstraintTarget> for Fixed
impl IsA<Widget> for Fixed
Auto Trait Implementations§
impl RefUnwindSafe for Fixed
impl !Send for Fixed
impl !Sync for Fixed
impl Unpin for Fixed
impl UnwindSafe for Fixed
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fn update_property(&self, properties: &[Property<'_>])
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fn update_relation(&self, relations: &[Relation<'_>])
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fn update_state(&self, states: &[State])
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