在 Rust 中,你可以使用 winapi 庫來處理 Windows 窗口消息。winapi 是一個用于訪問 Windows API 的庫,它提供了大量的函數和數據類型,可以幫助你處理窗口消息。
首先,你需要在 Cargo.toml 文件中添加 winapi 和 winuser 依賴:
[dependencies]
winapi = "0.3"
winuser = "0.3"
接下來,你可以使用 winapi 庫中的函數來處理窗口消息。以下是一個簡單的示例,展示了如何使用 winapi 處理窗口消息:
extern crate winapi;
extern crate winuser;
use std::ffi::c_void;
use std::os::raw::c_uint;
use winapi::shared::minwindef::{HWND, UINT, WPARAM, LPARAM};
use winapi::um::winuser::{RegisterWindowMessage, DefWindowProcW, DispatchMessageW, TranslateMessage};
// 自定義窗口類
const CLASS_NAME: &str = "MyWindowClass";
// 窗口過程函數
fn window_proc(hwnd: HWND, msg: UINT, wparam: WPARAM, lparam: LPARAM) -> c_uint {
match msg {
winuser::WM_DESTROY => {
println!("Window received a WM_DESTROY message. Closing...");
winuser::PostQuitMessage(0);
0
},
_ => DefWindowProcW(hwnd, msg, wparam, lparam),
}
}
fn main() {
// 注冊窗口類
unsafe {
let class_atom = winuser::RegisterClassW(winuser::WNDCLASSEXW {
cbSize: std::mem::size_of::<winuser::WNDCLASSEXW>() as u32,
style: 0,
lpfnWndProc: Some(window_proc as WNDPROC),
cbClsExtra: 0,
cbWndExtra: 0,
hInstance: winapi::GetModuleHandleW(None),
hIcon: 0,
hCursor: 0,
hbrBackground: 0,
lpszMenuName: None,
lpszClassName: CLASS_NAME,
hIconSm: 0,
});
if class_atom == 0 {
panic!("Failed to register window class");
}
}
// 創建窗口
let hwnd = unsafe {
winuser::CreateWindowExW(
0,
CLASS_NAME,
"My Window",
winuser::WS_OVERLAPPEDWINDOW,
winuser::CW_USEDEFAULT,
winuser::CW_USEDEFAULT,
800,
600,
None,
None,
winapi::GetModuleHandleW(None),
None,
)
};
if hwnd == 0 {
panic!("Failed to create window");
}
// 消息循環
unsafe {
let mut msg = winuser::MSG::default();
while winuser::GetMessageW(&mut msg, None, 0, 0) != 0 {
if msg.message == winuser::WM_QUIT {
break;
}
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
}
}
這個示例中,我們首先注冊了一個窗口類,然后創建了一個窗口。接下來,我們進入一個消息循環,不斷地從 GetMessage 函數中獲取窗口消息。當收到 WM_QUIT 消息時,我們退出消息循環。對于其他消息,我們使用 DefWindowProc 函數處理它們。在這個簡單的示例中,我們只處理了 WM_DESTROY 消息,但你可以根據需要處理其他消息。