Struct gtk::Scale [−][src]
pub struct Scale(_);
Expand description
A GtkScale is a slider control used to select a numeric value.
To use it, you’ll probably want to investigate the methods on
its base class, Range, in addition to the methods for GtkScale itself.
To set the value of a scale, you would normally use RangeExt::set_value().
To detect changes to the value, you would normally use the
signal::Range::value-changed signal.
Note that using the same upper and lower bounds for the Scale (through
the Range methods) will hide the slider itself. This is useful for
applications that want to show an undeterminate value on the scale, without
changing the layout of the application (such as movie or music players).
GtkScale as GtkBuildable
GtkScale supports a custom <marks> element, which can contain multiple
<mark> elements. The “value” and “position” attributes have the same
meaning as ScaleExt::add_mark() parameters of the same name. If the
element is not empty, its content is taken as the markup to show at
the mark. It can be translated with the usual ”translatable” and
“context” attributes.
CSS nodes
⚠️ The following code is in plain ⚠️
scale[.fine-tune][.marks-before][.marks-after]
├── marks.top
│ ├── mark
│ ┊ ├── [label]
│ ┊ ╰── indicator
┊ ┊
│ ╰── mark
├── [value]
├── contents
│ ╰── trough
│ ├── slider
│ ├── [highlight]
│ ╰── [fill]
╰── marks.bottom
├── mark
┊ ├── indicator
┊ ╰── [label]
╰── mark
GtkScale has a main CSS node with name scale and a subnode for its contents, with subnodes named trough and slider.
The main node gets the style class .fine-tune added when the scale is in ‘fine-tuning’ mode.
If the scale has an origin (see ScaleExt::set_has_origin()), there is a
subnode with name highlight below the trough node that is used for rendering
the highlighted part of the trough.
If the scale is showing a fill level (see RangeExt::set_show_fill_level()),
there is a subnode with name fill below the trough node that is used for
rendering the filled in part of the trough.
If marks are present, there is a marks subnode before or after the contents node, below which each mark gets a node with name mark. The marks nodes get either the .top or .bottom style class.
The mark node has a subnode named indicator. If the mark has text, it also has a subnode named label. When the mark is either above or left of the scale, the label subnode is the first when present. Otherwise, the indicator subnode is the first.
The main CSS node gets the ‘marks-before’ and/or ‘marks-after’ style classes added depending on what marks are present.
If the scale is displaying the value (see property::Scale::draw-value), there is
subnode with name value.
Implements
ScaleExt, RangeExt, WidgetExt, glib::ObjectExt, BuildableExt, OrientableExt, WidgetExtManual, BuildableExtManual
Implementations
Creates a new Scale.
orientation
the scale’s orientation.
adjustment
the Adjustment which sets the range
of the scale, or None to create a new adjustment.
Returns
a new Scale
Creates a new scale widget with the given orientation that lets the
user input a number between min and max (including min and max)
with the increment step. step must be nonzero; it’s the distance
the slider moves when using the arrow keys to adjust the scale
value.
Note that the way in which the precision is derived works best if step
is a power of ten. If the resulting precision is not suitable for your
needs, use ScaleExt::set_digits() to correct it.
orientation
the scale’s orientation.
min
minimum value
max
maximum value
step
step increment (tick size) used with keyboard shortcuts
Returns
a new Scale
Creates a new builder-pattern struct instance to construct Scale objects.
This method returns an instance of ScaleBuilder which can be used to create Scale objects.
Trait Implementations
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <=
operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
Returns the type identifier of Self.
Auto Trait Implementations
impl RefUnwindSafe for Scaleimpl UnwindSafe for ScaleBlanket Implementations
Mutably borrows from an owned value. Read more
Upcasts an object to a superclass or interface T. Read more
Upcasts an object to a reference of its superclass or interface T. Read more
Tries to downcast to a subclass or interface implementor T. Read more
Tries to downcast to a reference of its subclass or interface implementor T. Read more
Tries to cast to an object of type T. This handles upcasting, downcasting
and casting between interface and interface implementors. All checks are performed at
runtime, while downcast and upcast will do many checks at compile-time already. Read more
Tries to cast to reference to an object of type T. This handles upcasting, downcasting
and casting between interface and interface implementors. All checks are performed at
runtime, while downcast and upcast will do many checks at compile-time already. Read more
Casts to T unconditionally. Read more
Casts to &T unconditionally. Read more
Returns true if the object is an instance of (can be cast to) T.
pub fn set_properties_from_value(
&self,
property_values: &[(&str, Value)]
) -> Result<(), BoolError>pub fn set_property<'a, N, V>(
&self,
property_name: N,
value: V
) -> Result<(), BoolError> where
V: ToValue,
N: Into<&'a str>, pub fn set_property_from_value<'a, N>(
&self,
property_name: N,
value: &Value
) -> Result<(), BoolError> where
N: Into<&'a str>, Safety Read more
Safety Read more
Safety Read more
Safety Read more
pub fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec) + Send + Sync, pub fn connect_notify_local<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec), pub unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec), pub fn has_property<'a, N>(&self, property_name: N, type_: Option<Type>) -> bool where
N: Into<&'a str>, pub fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where
N: Into<&'a str>, pub fn connect<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
N: Into<&'a str>, Same as connect but takes a SignalId instead of a signal name.
pub fn connect_local<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + 'static,
N: Into<&'a str>, Same as connect_local but takes a SignalId instead of a signal name.
pub unsafe fn connect_unsafe<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value>,
N: Into<&'a str>, Same as connect_unsafe but takes a SignalId instead of a signal name.
Emit signal by signal id.
Emit signal with details by signal id.
Emit signal by it’s name.
pub fn bind_property<'a, O, N, M>(
&'a self,
source_property: N,
target: &'a O,
target_property: M
) -> BindingBuilder<'a> where
O: ObjectType,
N: Into<&'a str>,
M: Into<&'a str>, Same as emit but takes Value for the arguments.
Same as emit_by_name but takes Value for the arguments.
Returns a SendValue clone of self.
impl<'a, T, C> FromValueOptional<'a> for T where
C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError>,
T: FromValue<'a, Checker = C>,