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|
//! Logging events in a scrolling list.
//!
//! Events are logged in an upwards scrolled box that forgets about the events
//! that move off-screen. The logger may optionally add timestamps to events.
//!
//! To create a log widget, make a `LogBuilder`, optionally modify properties,
//! and then use its `create` method to create a `Log` object.
use std::ptr;
use crate::bindings;
use crate::core::Screen;
pub struct Log {
ptr: *mut bindings::Logwidget,
}
pub struct LogBuilder<'a, 'b> {
_screen: &'a Screen<'b>,
lefttop: (u32, u32),
size: (u32, u32),
title: Option<&'a str>,
timestamps: bool,
}
impl<'a, 'b> LogBuilder<'a, 'b> {
pub fn new(screen: &'a Screen<'b>, lefttop: (u32, u32), size: (u32, u32)) -> Self {
LogBuilder {
_screen: screen,
lefttop, size,
title: None,
timestamps: false,
}
}
pub fn add_title<'s: 'a>(&mut self, title: &'s str) -> &mut Self {
self.title = Some(title);
self
}
pub fn set_timestamps(&mut self, timestamps: bool) -> &mut Self {
self.timestamps = timestamps;
self
}
pub fn create(&self) -> Log {
Log {
ptr: unsafe {
bindings::lgw_make(
self.lefttop.0 as i32, self.lefttop.1 as i32,
self.size.0 as i32, self.size.1 as i32,
match self.title {
None => ptr::null(),
Some(s) => s.as_ptr() as *const i8,
},
self.timestamps)
}
}
}
}
impl Log {
/// Called automatically; should only be needed if something else overwrote
/// the widget.
pub fn redraw(&self) {
unsafe { bindings::lgw_redraw(self.ptr); }
}
pub fn add(&mut self, line: &str) {
unsafe { bindings::lgw_add(self.ptr, line.as_ptr() as *const i8); }
}
pub fn clear(&mut self) {
unsafe { bindings::lgw_clear(self.ptr); }
}
pub fn change_title(&mut self, title: &str) {
unsafe { bindings::lgw_changetitle(self.ptr, title.as_ptr() as *const i8); }
}
}
impl Drop for Log {
fn drop(&mut self) {
unsafe { bindings::lgw_destroy(self.ptr); }
}
}
|
