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use std::hash::Hash;
use std::any::TypeId;
use std::time::Duration;
use winapi::{HWND, UINT_PTR, ULONG_PTR, UINT, DWORD};
use ui::Ui;
use controls::{Control, ControlT, ControlType, AnyHandle};
use error::Error;
use events::Event;
static mut TIMERS_ID: UINT_PTR = 0;
#[derive(Clone)]
pub struct TimerT {
pub interval: u32,
}
impl<ID: Hash+Clone> ControlT<ID> for TimerT {
fn type_id(&self) -> TypeId { TypeId::of::<Timer>() }
fn events(&self) -> Vec<Event> {
vec![Event::Destroyed, Event::Tick]
}
fn build(&self, ui: &Ui<ID>) -> Result<Box<Control>, Error> {
Ok(Box::new(Timer{
watcher: unsafe{ ui.message_handle() },
interval: self.interval,
id_event: unsafe{ TIMERS_ID+=1; TIMERS_ID },
handle: None,
time: 0,
}))
}
}
pub struct Timer {
time: u32,
interval: u32,
watcher: HWND,
id_event: ULONG_PTR,
handle: Option<UINT_PTR>,
}
impl Timer {
pub fn start(&mut self) {
use user32::SetTimer;
use kernel32::GetTickCount;
self.time = unsafe{GetTickCount()};
self.handle = unsafe{ Some( SetTimer(self.watcher, self.id_event, self.interval, Some(timer_callback)) ) };
}
pub fn stop(&mut self) {
use user32::KillTimer;
if let Some(id) = self.handle.take() {
unsafe{ KillTimer(self.watcher, id); }
self.time = 0;
}
}
pub fn running(&self) -> bool {
self.handle.is_some()
}
pub fn elapsed(&self) -> Duration {
use kernel32::GetTickCount;
let elapsed = unsafe{ (GetTickCount() - self.time) as u64 };
Duration::from_millis( elapsed )
}
pub fn set_interval(&mut self, interval: u32) { self.interval = interval; }
pub fn get_interval(&self) -> u32 { self.interval }
}
impl Control for Timer {
fn handle(&self) -> AnyHandle {
AnyHandle::Custom(TypeId::of::<Timer>(), self.id_event as usize)
}
fn control_type(&self) -> ControlType {
ControlType::Timer
}
fn free(&mut self) {
use user32::KillTimer;
if let Some(id) = self.handle.take() {
unsafe{ KillTimer(self.watcher, id); }
}
}
}
#[allow(unused_variables, non_snake_case)]
unsafe extern "system" fn timer_callback(hwnd: HWND, uMsg: UINT, idEvent: UINT_PTR, dwTime: DWORD) {
use user32::SendMessageW;
use winapi::{WM_TIMER, WPARAM};
SendMessageW(hwnd, WM_TIMER, idEvent as WPARAM, 0);
}