Trait VLog 

pub trait VLog {
    // Required methods
    fn enabled(&self, metadata: &Metadata<'_>) -> bool;
    fn vlog(&self, record: &Record<'_>);
    fn clear(&self, surface: &str);
    fn flush(&self);
}

A trait encapsulating the operations required of a vlogger.

Required Methods

fn enabled(&self, metadata: &Metadata<'_>) -> bool

Determines if a vlog command with the specified metadata would be vlogged.

This is used by the vlog_enabled! macro to allow callers to avoid expensive computation of vlog message arguments if the message would be discarded anyway.

For implementors

This method isn’t called automatically by the vlogging macros. It’s up to an implementation of the VLog trait to call enabled in its own vlog method implementation to guarantee that filtering is applied.

fn vlog(&self, record: &Record<'_>)

Draw a point or line in 3D or 2D (ignoring z or using it as z-index).

For implementors

Note that enabled is not necessarily called before this method. Implementations of vlog should perform all necessary filtering internally.

fn clear(&self, surface: &str)

Clear a drawing surface e.g. to redraw its content.

For implementors

Note that enabled is called before this method.

fn flush(&self)

Flushes any buffered records.

For implementors

This method isn’t called automatically by the vlogging macros. It can be called manually on shut-down to ensure any in-flight records are flushed.

Implementations on Foreign Types

impl<T> VLog for &T

where T: ?Sized + VLog,

fn enabled(&self, metadata: &Metadata<'_>) -> bool

fn vlog(&self, record: &Record<'_>)

fn clear(&self, surface: &str)

fn flush(&self)

impl<T> VLog for Box<T>

where T: ?Sized + VLog,

Available on crate feature std only.

fn enabled(&self, metadata: &Metadata<'_>) -> bool

fn vlog(&self, record: &Record<'_>)

fn clear(&self, surface: &str)

fn flush(&self)

impl<T> VLog for Arc<T>

where T: ?Sized + VLog,

Available on crate feature std only.

fn enabled(&self, metadata: &Metadata<'_>) -> bool

fn vlog(&self, record: &Record<'_>)

fn clear(&self, surface: &str)

fn flush(&self)

Implementors