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use std::sync::atomics::AtomicBool;
use std::ptr;
use {Event, WindowBuilder};
pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};
mod event;
mod ffi;
mod init;
mod monitor;
/// The Win32 implementation of the main `Window` object.
pub struct Window {
/// Main handle for the window.
window: ffi::HWND,
/// This represents a "draw context" for the surface of the window.
hdc: ffi::HDC,
/// OpenGL context.
context: ffi::HGLRC,
/// Binded to `opengl32.dll`.
///
/// `wglGetProcAddress` returns null for GL 1.1 functions because they are
/// already defined by the system. This module contains them.
gl_library: ffi::HMODULE,
/// Receiver for the events dispatched by the window callback.
events_receiver: Receiver<Event>,
/// True if a `Closed` event has been received.
is_closed: AtomicBool,
}
impl Window {
/// See the docs in the crate root file.
pub fn new(builder: WindowBuilder) -> Result<Window, String> {
init::new_window(builder)
}
/// See the docs in the crate root file.
pub fn is_closed(&self) -> bool {
use std::sync::atomics::Relaxed;
self.is_closed.load(Relaxed)
}
/// See the docs in the crate root file.
///
/// Calls SetWindowText on the HWND.
pub fn set_title(&self, text: &str) {
unsafe {
ffi::SetWindowTextW(self.window,
text.utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr() as ffi::LPCWSTR);
}
}
/// See the docs in the crate root file.
pub fn get_position(&self) -> Option<(int, int)> {
use std::mem;
let mut placement: ffi::WINDOWPLACEMENT = unsafe { mem::zeroed() };
placement.length = mem::size_of::<ffi::WINDOWPLACEMENT>() as ffi::UINT;
if unsafe { ffi::GetWindowPlacement(self.window, &mut placement) } == 0 {
return None
}
let ref rect = placement.rcNormalPosition;
Some((rect.left as int, rect.top as int))
}
/// See the docs in the crate root file.
pub fn set_position(&self, x: int, y: int) {
use libc;
unsafe {
ffi::SetWindowPos(self.window, ptr::null(), x as libc::c_int, y as libc::c_int,
0, 0, ffi::SWP_NOZORDER | ffi::SWP_NOSIZE);
ffi::UpdateWindow(self.window);
}
}
/// See the docs in the crate root file.
pub fn get_inner_size(&self) -> Option<(uint, uint)> {
use std::mem;
let mut rect: ffi::RECT = unsafe { mem::uninitialized() };
if unsafe { ffi::GetClientRect(self.window, &mut rect) } == 0 {
return None
}
Some((
(rect.right - rect.left) as uint,
(rect.bottom - rect.top) as uint
))
}
/// See the docs in the crate root file.
pub fn get_outer_size(&self) -> Option<(uint, uint)> {
use std::mem;
let mut rect: ffi::RECT = unsafe { mem::uninitialized() };
if unsafe { ffi::GetWindowRect(self.window, &mut rect) } == 0 {
return None
}
Some((
(rect.right - rect.left) as uint,
(rect.bottom - rect.top) as uint
))
}
/// See the docs in the crate root file.
pub fn set_inner_size(&self, x: uint, y: uint) {
use libc;
unsafe {
ffi::SetWindowPos(self.window, ptr::null(), 0, 0, x as libc::c_int,
y as libc::c_int, ffi::SWP_NOZORDER | ffi::SWP_NOREPOSITION);
ffi::UpdateWindow(self.window);
}
}
/// See the docs in the crate root file.
// TODO: return iterator
pub fn poll_events(&self) -> Vec<Event> {
let mut events = Vec::new();
loop {
match self.events_receiver.try_recv() {
Ok(ev) => events.push(ev),
Err(_) => break
}
}
// if one of the received events is `Closed`, setting `is_closed` to true
if events.iter().find(|e| match e { &&::Closed => true, _ => false }).is_some() {
use std::sync::atomics::Relaxed;
self.is_closed.store(true, Relaxed);
}
events
}
/// See the docs in the crate root file.
// TODO: return iterator
pub fn wait_events(&self) -> Vec<Event> {
match self.events_receiver.recv_opt() {
Ok(ev) => {
// if the received event is `Closed`, setting `is_closed` to true
match ev {
::Closed => {
use std::sync::atomics::Relaxed;
self.is_closed.store(true, Relaxed);
},
_ => ()
};
// looing for other possible events in the queue
let mut result = self.poll_events();
result.insert(0, ev);
result
},
Err(_) => {
use std::sync::atomics::Relaxed;
self.is_closed.store(true, Relaxed);
vec![]
}
}
}
/// See the docs in the crate root file.
pub unsafe fn make_current(&self) {
// TODO: check return value
ffi::wgl::MakeCurrent(self.hdc, self.context);
}
/// See the docs in the crate root file.
pub fn get_proc_address(&self, addr: &str) -> *const () {
use std::c_str::ToCStr;
unsafe {
addr.with_c_str(|s| {
let p = ffi::wgl::GetProcAddress(s) as *const ();
if !p.is_null() { return p; }
ffi::GetProcAddress(self.gl_library, s) as *const ()
})
}
}
/// See the docs in the crate root file.
pub fn swap_buffers(&self) {
unsafe {
// calling glFlush is necessary on Windows 8
ffi::glFlush();
ffi::SwapBuffers(self.hdc);
}
}
}
#[unsafe_destructor]
impl Drop for Window {
fn drop(&mut self) {
use std::ptr;
unsafe { ffi::wgl::MakeCurrent(ptr::null(), ptr::null()); }
unsafe { ffi::wgl::DeleteContext(self.context); }
unsafe { ffi::DestroyWindow(self.window); }
}
}
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