Enum conrod::MaybeParent
[−]
[src]
pub enum MaybeParent { None, Some(Index), Unspecified, }
The builder argument for the Widget's parent.
Variants
None
The user specified the widget should not have any parents, so the Root will be used.
Some(Index)
The user gave a specific parent widget.
Unspecified
No parent widget was specified, so we will assume they want the last parent.
Methods
impl MaybeParent
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fn get_unchecked<B>(&self, ui: &Ui<B>, x_pos: Position, y_pos: Position) -> Index where B: Backend
Convert the MaybeParent into an Option
If Unspecified
, check the positioning to retrieve the Index from there.
If None
, the Ui
's window
widget will be used.
Note: This method does not check whether or not using the window
widget as the parent
would cause a cycle. If it is important that the inferred parent should not cause a cycle,
use get
instead.
fn get<B>(&self, idx: Index, ui: &Ui<B>, x_pos: Position, y_pos: Position) -> Option<Index> where B: Backend
The same as get_unchecked
, but checks whether or not the widget that we're inferring the
parent for is the Ui
's window (which cannot have a parent, without creating a cycle).
Trait Implementations
impl PartialEq for MaybeParent
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fn eq(&self, __arg_0: &MaybeParent) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &MaybeParent) -> bool
This method tests for !=
.
impl Debug for MaybeParent
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impl Clone for MaybeParent
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fn clone(&self) -> MaybeParent
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more