Struct Component 

pub struct Component {

    pub node: Option<Component>,
    pub id: SmolStr,
    pub root_element: ElementRc,
    pub parent_element: RefCell<ElementWeak>,
    pub optimized_elements: RefCell<Vec<ElementRc>>,
    pub root_constraints: RefCell<LayoutConstraints>,
    pub child_insertion_point: RefCell<Option<ChildrenInsertionPoint>>,
    pub init_code: RefCell<InitCode>,
    pub popup_windows: RefCell<Vec<PopupWindow>>,
    pub timers: RefCell<Vec<Timer>>,
    pub menu_item_tree: RefCell<Vec<Rc<Component>>>,
    pub inherits_popup_window: Cell<bool>,
    pub exported_global_names: RefCell<Vec<ExportedName>>,
    pub used: Cell<bool>,
    pub private_properties: RefCell<Vec<(SmolStr, Type)>>,
    pub from_library: Cell<bool>,
}

A component is a type in the language which can be instantiated, Or is materialized for repeated expression.

Fields

node: Option<Component>

id: SmolStr

root_element: ElementRc

parent_element: RefCell<ElementWeak>

The parent element within the parent component if this component represents a repeated element

optimized_elements: RefCell<Vec<ElementRc>>

List of elements that are not attached to the root anymore because they have been optimized away, but their properties may still be in use

root_constraints: RefCell<LayoutConstraints>

The layout constraints of the root item

child_insertion_point: RefCell<Option<ChildrenInsertionPoint>>

When creating this component and inserting “children”, append them to the children of the element pointer to by this field.

init_code: RefCell<InitCode>

popup_windows: RefCell<Vec<PopupWindow>>

timers: RefCell<Vec<Timer>>

menu_item_tree: RefCell<Vec<Rc<Component>>>

inherits_popup_window: Cell<bool>

This component actually inherits PopupWindow (although that has been changed to a Window by the lower_popups pass)

exported_global_names: RefCell<Vec<ExportedName>>

The names under which this component should be accessible if it is a global singleton and exported.

used: Cell<bool>

True if this component is used as a sub-component by at least one other component.

private_properties: RefCell<Vec<(SmolStr, Type)>>

The list of properties (name and type) declared as private in the component. This is used to issue better error in the generated code if the property is used.

from_library: Cell<bool>

True if this component is imported from an external library.

Implementations

impl Component

pub fn from_node( node: Component, diag: &mut BuildDiagnostics, tr: &TypeRegister, ) -> Rc<Self>

pub fn is_global(&self) -> bool

This component is a global component introduced with the “global” keyword

pub fn is_interface(&self) -> bool

This is an interface introduced with the “interface” keyword

pub fn inherits_system_tray_icon(&self) -> bool

True if this component’s root resolves to the SystemTrayIcon native class. Uses native_class() rather than builtin_type() so the check still matches once the root has been resolved to Native(SystemTrayIcon) after resolve_native_classes.

pub fn global_aliases(&self) -> Vec<SmolStr>

Returns the names of aliases to global singletons, exactly as specified in the .slint markup (not normalized).

pub fn repeater_count(&self) -> u32

pub fn parent_element(&self) -> Option<ElementRc>

Convenience accessor to get the parent element if this component is a repeated component, or None otherwise.

Panics

Panics if the Self::parent_element member is currently mutably borrowed

Trait Implementations

impl Debug for Component

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Component

fn default() -> Component

Returns the “default value” for a type.