pub struct Breakpoint { /* private fields */ }
v1_4
only.Expand description
Describes a breakpoint for Window
or Dialog
.
Breakpoints are used to create adaptive UI, allowing to change the layout depending on available size.
Breakpoint is a size threshold, specified by its condition, as well as one or more setters.
Each setter has a target object, a property and a value. When a breakpoint is applied, each setter sets the target property on their target object to the specified value, and reset it back to the original value when it’s unapplied.
For more complicated scenarios, apply
and
unapply
can be used instead.
Breakpoints can be used within Window
, ApplicationWindow
,
Dialog
or BreakpointBin
.
§Breakpoint
as gtk::Buildable
:
Breakpoint
supports specifying its condition via the <condition>
element. The contents of the element must be a string in a format accepted by
parse()
.
It also supports adding setters via the <setter>
element. Each <setter>
element must have the object
attribute specifying the target object, and
the property
attribute specifying the property name. The contents of the
element are used as the setter value.
For G_TYPE_OBJECT
and G_TYPE_BOXED
derived properties, empty contents are
treated as NULL
.
Setter values can be translated with the usual translatable
, context
and
comments
attributes.
Example of an Breakpoint
UI definition:
<object class="AdwBreakpoint">
<condition>max-width: 400px</condition>
<setter object="button" property="visible">True</setter>
<setter object="box" property="orientation">vertical</setter>
<setter object="page" property="title" translatable="yes">Example</setter>
</object>
§Properties
§condition
The breakpoint’s condition.
Readable | Writeable
§Signals
§apply
Emitted when the breakpoint is applied.
This signal is emitted after the setters have been applied.
§unapply
Emitted when the breakpoint is unapplied.
This signal is emitted before resetting the setter values.
§Implements
[trait@glib::ObjectExt
], gtk::prelude::BuildableExt
GLib type: GObject with reference counted clone semantics.
Implementations§
source§impl Breakpoint
impl Breakpoint
sourcepub fn new(condition: BreakpointCondition) -> Breakpoint
pub fn new(condition: BreakpointCondition) -> Breakpoint
Creates a new Breakpoint
with @condition.
§condition
the condition
§Returns
the newly created Breakpoint
sourcepub fn add_setter(
&self,
object: &impl IsA<Object>,
property: &str,
value: Option<&Value>,
)
pub fn add_setter( &self, object: &impl IsA<Object>, property: &str, value: Option<&Value>, )
Adds a setter to @self.
The setter will automatically set @property on @object to @value when applying the breakpoint, and set it back to its original value upon unapplying it.
::: note
Setting properties to their original values does not work for properties
that have irreversible side effects. For example, changing
[label
][struct@crate::Gtk::Button#label] while [icon-name
][struct@crate::Gtk::Button#icon-name] is set
will reset the icon. However, resetting the label will not set
icon-name
to its original value.
Use the apply
and unapply
signals
for those properties instead, as follows:
⚠️ The following code is in c ⚠️
static void
breakpoint_apply_cb (MyWidget *self)
{
gtk_button_set_icon_name (self->button, "go-previous-symbolic");
}
static void
breakpoint_apply_cb (MyWidget *self)
{
gtk_button_set_label (self->button, _("_Back"));
}
// ...
g_signal_connect_swapped (breakpoint, "apply",
G_CALLBACK (breakpoint_apply_cb), self);
g_signal_connect_swapped (breakpoint, "unapply",
G_CALLBACK (breakpoint_unapply_cb), self);
§object
the target object
§property
the target property
§value
the value to set
sourcepub fn condition(&self) -> Option<BreakpointCondition>
pub fn condition(&self) -> Option<BreakpointCondition>
sourcepub fn set_condition(&self, condition: Option<&BreakpointCondition>)
pub fn set_condition(&self, condition: Option<&BreakpointCondition>)
sourcepub fn connect_apply<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
pub fn connect_apply<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
Emitted when the breakpoint is applied.
This signal is emitted after the setters have been applied.
sourcepub fn connect_unapply<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
pub fn connect_unapply<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
Emitted when the breakpoint is unapplied.
This signal is emitted before resetting the setter values.
pub fn connect_condition_notify<F: Fn(&Self) + 'static>( &self, f: F, ) -> SignalHandlerId
source§impl Breakpoint
impl Breakpoint
sourcepub fn add_setters(&self, additions: &[(&impl IsA<Object>, &str, impl ToValue)])
pub fn add_setters(&self, additions: &[(&impl IsA<Object>, &str, impl ToValue)])
Adds @n_setters setters to @self.
This is a convenience function for adding multiple setters at once.
See add_setter()
.
This function is meant to be used by language bindings.
§objects
setter target object
§names
setter target properties
§values
setter values
Trait Implementations§
source§impl Clone for Breakpoint
impl Clone for Breakpoint
source§impl Debug for Breakpoint
impl Debug for Breakpoint
source§impl HasParamSpec for Breakpoint
impl HasParamSpec for Breakpoint
type ParamSpec = ParamSpecObject
source§type SetValue = Breakpoint
type SetValue = Breakpoint
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, Breakpoint>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for Breakpoint
impl Hash for Breakpoint
source§impl Ord for Breakpoint
impl Ord for Breakpoint
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 Breakpoint
impl ParentClassIs for Breakpoint
source§impl<OT: ObjectType> PartialEq<OT> for Breakpoint
impl<OT: ObjectType> PartialEq<OT> for Breakpoint
source§impl<OT: ObjectType> PartialOrd<OT> for Breakpoint
impl<OT: ObjectType> PartialOrd<OT> for Breakpoint
source§impl StaticType for Breakpoint
impl StaticType for Breakpoint
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Breakpoint
impl IsA<Buildable> for Breakpoint
Auto Trait Implementations§
impl Freeze for Breakpoint
impl RefUnwindSafe for Breakpoint
impl !Send for Breakpoint
impl !Sync for Breakpoint
impl Unpin for Breakpoint
impl UnwindSafe for Breakpoint
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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impl<O> BuildableExt for O
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impl<T> Cast for Twhere
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R: TryFromClosureReturnValue,
fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
source§fn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value],
) -> Option<Value>
fn emit_by_name_with_values( &self, signal_name: &str, args: &[Value], ) -> Option<Value>
source§fn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue],
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue],
) -> Rwhere
R: TryFromClosureReturnValue,
source§fn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value],
) -> Option<Value>
fn emit_by_name_with_details_and_values( &self, signal_name: &str, details: Quark, args: &[Value], ) -> Option<Value>
source§fn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue],
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue],
) -> Rwhere
R: TryFromClosureReturnValue,
source§fn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value],
) -> Option<Value>
fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value], ) -> Option<Value>
source§fn disconnect(&self, handler_id: SignalHandlerId)
fn disconnect(&self, handler_id: SignalHandlerId)
source§fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F,
) -> SignalHandlerId
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F, ) -> SignalHandlerId
notify
signal of the object. Read more