[−][src]Struct geos::ContextHandle
Methods
impl<'a> ContextHandle<'a>
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pub fn init() -> GResult<Self>
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Creates a new ContextHandle
.
Example
use geos::ContextHandle; let context_handle = ContextHandle::init().expect("invalid init");
pub fn set_notice_message_handler(
&self,
nf: Option<Box<dyn Fn(&str) + Send + Sync + 'a>>
)
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&self,
nf: Option<Box<dyn Fn(&str) + Send + Sync + 'a>>
)
Allows to set a notice message handler.
Passing None
as parameter will unset this callback.
Example
use geos::ContextHandle; let context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_notice_message_handler(Some(Box::new(|s| println!("new message: {}", s))));
pub fn set_error_message_handler(
&self,
ef: Option<Box<dyn Fn(&str) + Send + Sync + 'a>>
)
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&self,
ef: Option<Box<dyn Fn(&str) + Send + Sync + 'a>>
)
Allows to set an error message handler.
Passing None
as parameter will unset this callback.
Example
use geos::ContextHandle; let context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_error_message_handler(Some(Box::new(|s| println!("new message: {}", s))));
pub fn get_last_error(&self) -> Option<String>
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Returns the last error encountered.
Please note that calling this function will remove the current last error!
use geos::ContextHandle; let context_handle = ContextHandle::init().expect("invalid init"); // make some functions calls... if let Some(last_error) = context_handle.get_last_error() { println!("We have an error: {}", last_error); } else { println!("No error occurred!"); }
pub fn get_last_notification(&self) -> Option<String>
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Returns the last notification encountered.
Please note that calling this function will remove the current last notification!
use geos::ContextHandle; let context_handle = ContextHandle::init().expect("invalid init"); // make some functions calls... if let Some(last_notif) = context_handle.get_last_notification() { println!("We have a notification: {}", last_notif); } else { println!("No notifications!"); }
pub fn get_wkb_output_dimensions(&self) -> GResult<OutputDimension>
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Gets WKB output dimensions.
Example
use geos::{ContextHandle, OutputDimension}; let mut context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_wkb_output_dimensions(OutputDimension::TwoD); assert_eq!(context_handle.get_wkb_output_dimensions(), Ok(OutputDimension::TwoD));
pub fn set_wkb_output_dimensions(
&mut self,
dimensions: OutputDimension
) -> GResult<OutputDimension>
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&mut self,
dimensions: OutputDimension
) -> GResult<OutputDimension>
Sets WKB output dimensions.
Example
use geos::{ContextHandle, OutputDimension}; let mut context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_wkb_output_dimensions(OutputDimension::TwoD); assert_eq!(context_handle.get_wkb_output_dimensions(), Ok(OutputDimension::TwoD));
pub fn get_wkb_byte_order(&self) -> ByteOrder
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Gets WKB byte order.
Example
use geos::{ContextHandle, ByteOrder}; let mut context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_wkb_byte_order(ByteOrder::LittleEndian); assert!(context_handle.get_wkb_byte_order() == ByteOrder::LittleEndian);
pub fn set_wkb_byte_order(&mut self, byte_order: ByteOrder) -> ByteOrder
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Sets WKB byte order.
Example
use geos::{ContextHandle, ByteOrder}; let mut context_handle = ContextHandle::init().expect("invalid init"); context_handle.set_wkb_byte_order(ByteOrder::LittleEndian); assert!(context_handle.get_wkb_byte_order() == ByteOrder::LittleEndian);
Trait Implementations
impl<'a> Drop for ContextHandle<'a>
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Auto Trait Implementations
impl<'a> Send for ContextHandle<'a>
impl<'a> Sync for ContextHandle<'a>
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,