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Setup unique class naming for windows on Windows

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This commit is contained in:
Mirko Covizzi 2020-05-25 22:15:58 +02:00
parent 5d429fd5ae
commit f75177e9b6
2 changed files with 24 additions and 3 deletions
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2
Cargo.toml
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@ -9,4 +9,4 @@ edition = "2018"
[dependencies]
[target.'cfg(windows)'.dependencies]
winapi = { version = "0.3.8", features = ["libloaderapi", "winuser", "windef", "minwindef"] }
winapi = { version = "0.3.8", features = ["libloaderapi", "winuser", "windef", "minwindef", "guiddef", "combaseapi"] }

25
src/win/window.rs
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@ -1,8 +1,10 @@
extern crate winapi;
use self::winapi::_core::mem::MaybeUninit;
use self::winapi::shared::guiddef::GUID;
use self::winapi::shared::minwindef::{LPARAM, LPVOID, LRESULT, UINT, WPARAM};
use self::winapi::shared::windef::{HBRUSH, HICON, HMENU, HWND};
use self::winapi::um::combaseapi::CoCreateGuid;
use self::winapi::um::libloaderapi::GetModuleHandleA;
use self::winapi::um::winuser::{
CreateWindowExA, DefWindowProcA, DispatchMessageA, PeekMessageA, PostQuitMessage,
@ -47,13 +49,31 @@ pub unsafe extern "system" fn wnd_proc(
pub fn create_window(w: WindowOpenOptions) {
unsafe {
// We generate a unique name for the new window class to prevent name collisions
let mut guid: GUID = MaybeUninit::uninit().assume_init();
CoCreateGuid(&mut guid);
let class_name = format!(
"Baseview-{}-{}-{}-{}{}{}{}{}{}{}{}\0",
guid.Data1,
guid.Data2,
guid.Data3,
guid.Data4[0],
guid.Data4[1],
guid.Data4[2],
guid.Data4[3],
guid.Data4[4],
guid.Data4[5],
guid.Data4[6],
guid.Data4[7]
);
let hinstance = GetModuleHandleA(0 as *const i8);
let wnd_class = WNDCLASSA {
// todo: for OpenGL, will use it later
style: CS_OWNDC | CS_HREDRAW | CS_VREDRAW,
lpfnWndProc: Some(wnd_proc),
hInstance: hinstance,
lpszClassName: "BaseviewClass\0".as_ptr() as *const i8,
lpszClassName: class_name.as_ptr() as *const i8,
cbClsExtra: 0,
cbWndExtra: 0,
hIcon: 0 as HICON,
@ -65,7 +85,8 @@ pub fn create_window(w: WindowOpenOptions) {
let _hwnd = CreateWindowExA(
0,
"BaseviewClass\0".as_ptr() as *const i8,
class_name.as_ptr() as *const i8,
// todo: change title based on options struct
"Baseview\0".as_ptr() as *const i8,
// todo: fine for now, will have to change with a parent
WS_OVERLAPPEDWINDOW | WS_VISIBLE,