Enum kas::TkAction

#[must_use]pub enum TkAction {
    None,
    Redraw,
    RegionMoved,
    Popup,
    Reconfigure,
    Close,
    CloseAll,
}

Action required after processing

This type is returned by many widgets on modification to self and is tracked internally by event::Manager to determine which updates are needed to the UI.

All variants are progressive: e.g. Reconfigure implies all actions needed to handle Popup, RegionMoved and Redraw.

Two TkAction values may be combined by taking their maximum. Since this is a common operation, the + operator is defined to do this job, together with += on TkAction and event::Manager.

Users receiving a value of this type from a widget update method should generally call *mgr += action; during event handling. Prior to starting the event loop (toolkit.run()), these values can be ignored.

Variants

None

No action needed

Redraw

Whole window requires redrawing

Note that Manager::redraw can instead be used for more selective redrawing, if supported by the toolkit.

RegionMoved

Some widgets within a region moved

This action should be emitted when e.g. a scroll-region is moved or widget layout is adjusted to allow for the fact that coordinates (e.g. mouse position) have changed relative to widgets.

Popup

A pop-up opened/closed/needs resizing

Reconfigure

Whole window requires reconfiguring

Configuring widgets assigns WidgetId identifiers, updates event::Manager state and resizes all widgets.

Close

The window or pop-up should be closed

CloseAll

All windows should close (toolkit exit)

Trait Implementations

impl Add<TkAction> for TkAction

type Output = Self

The resulting type after applying the + operator.

fn add(self, rhs: TkAction) -> Self

Performs the + operation.

impl AddAssign<TkAction> for TkAction

fn add_assign(&mut self, rhs: TkAction)

Performs the += operation.

impl<'a> AddAssign<TkAction> for Manager<'a>

fn add_assign(&mut self, action: TkAction)

Performs the += operation.

impl Clone for TkAction

fn clone(&self) -> TkAction

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TkAction

impl Debug for TkAction

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

Formats the value using the given formatter.

impl Eq for TkAction

impl Ord for TkAction

fn cmp(&self, other: &TkAction) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<TkAction> for TkAction

fn eq(&self, other: &TkAction) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<TkAction> for TkAction

fn partial_cmp(&self, other: &TkAction) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for TkAction

impl StructuralPartialEq for TkAction