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add destroy callback

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This commit is contained in:
Wez Furlong 2019-08-08 00:11:29 -07:00
parent f678d02193
commit f908d6aad3
1 changed files with 9 additions and 1 deletions
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10
window/src/os/windows/window.rs
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@ -9,9 +9,15 @@ use winapi::um::libloaderapi::GetModuleHandleW;
use winapi::um::winuser::*;
pub trait WindowCallbacks {
/// Called when the window close button is clicked.
/// Return true to allow the close to continue, false to
/// prevent it from continuing.
fn can_close(&mut self) -> bool {
true
}
/// Called when the window is being destroyed by the gui system
fn destroy(&mut self) {}
}
struct WindowInner {
@ -181,7 +187,9 @@ unsafe fn wm_ncdestroy(hwnd: HWND, msg: UINT, wparam: WPARAM, lparam: LPARAM) ->
let raw = GetWindowLongPtrW(hwnd, GWLP_USERDATA) as LPVOID;
if !raw.is_null() {
let inner = take_arc_from_pointer(raw);
inner.lock().unwrap().hwnd = null_mut();
let mut inner = inner.lock().unwrap();
inner.callbacks.destroy();
inner.hwnd = null_mut();
SetWindowLongPtrW(hwnd, GWLP_USERDATA, 0);
}