Add a safe wrapper around EnumDisplayDevicesW

WinSafe

Windows API and GUI in safe, idiomatic Rust.

WinSafe has:

low-level Win32 API constants, functions and structs;
high-level structs to build native Win32 GUI applications.

WinSafe documentation:

Branch	Docs
Stable	docs.rs/winsafe
Nightly (master)	rodrigocfd.github.io/winsafe/winsafe

Current status

Native FFI items implemented:

Native FFI item	Count
Functions	776
Structs	235
Constants	13,376
Window messages	653
Handles	45
COM interfaces	82
COM methods	470

High-level GUI controls:

User custom window/dialog – main, modal, modeless, control, message-only.
Native controls – button, check box, combo box, date and time picker, edit, header, label, list box, list view, month calendar, progress bar, radio button, status bar, tab, track bar, tree view, up down.

Usage

Add the dependency in your Cargo.toml:

[dependencies]
winsafe = { version = "0.0.20", features = [] }

You can, alternatively, use the Nightly (master) branch directly, to get the latest features right away:

[dependencies]
winsafe = { git = "https://github.com/rodrigocfd/winsafe", features = [] }

Then you must enable the Cargo features you want to be included – these modules are named after native Windows DLL and library names, mostly.

The following Cargo features are available so far:

Feature	Description
`comctl`	ComCtl32.dll, for Common Controls
`dshow`	DirectShow
`dwm`	Dwmapi.dll, the Desktop Window Manager
`dxgi`	DirectX Graphics Infrastructure
`gdi`	Gdi32.dll, the Windows GDI
`gui`	The WinSafe high-level GUI abstractions
`kernel`	Kernel32.dll, Advapi32.dll and Ktmw32.dll – all others will include it
`mf`	Media Foundation
`ole`	OLE and basic COM support
`oleaut`	OLE Automation
`shell`	Shell32.dll, Shlwapi.dll, and Userenv.dll, the COM-based Windows Shell
`taskschd`	Task Scheduler
`user`	User32.dll and ComDlg32.dll, the basic Windows GUI support
`uxtheme`	UxTheme.dll, extended window theming
`version`	Version.dll, to manipulate *.exe version info

Although WinSafe already has a lot of Win32 APIs, it doesn't have everything, simply because Win32 API is gigantic. So if you're looking for a comprehensive Win32 coverage, take a look at winapi or windows crates, which are unsafe, but have everything.

Example

Note: You can find several examples in the dedicated repo: github.com/rodrigocfd/winsafe-examples

WinSafe allows you to create windows in two ways:

programmatically defining parameters; or
loading dialogs from a .res file created with a WYSIWYG resource editor.

The example below creates a window with a button programmatically. Note how the click event is handled with a closure:

[dependencies]
winsafe = { version = "0.0.20", features = ["gui"] }

#![windows_subsystem = "windows"]

use winsafe::{self as w, prelude::*, gui};

fn main() {
    let my = MyWindow::new(); // instantiate our main window
    if let Err(e) = my.wnd.run_main(None) { // ... and run it
        eprintln!("{}", e);
    }
}


#[derive(Clone)]
pub struct MyWindow {
    wnd:       gui::WindowMain, // responsible for managing the window
    btn_hello: gui::Button,     // a button
}

impl MyWindow {
    pub fn new() -> Self {
        let wnd = gui::WindowMain::new( // instantiate the window manager
            gui::WindowMainOpts {
                title: "My window title".to_owned(),
                size: (300, 150),
                ..Default::default() // leave all other options as default
            },
        );

        let btn_hello = gui::Button::new(
            &wnd, // the window manager is the parent of our button
            gui::ButtonOpts {
                text: "&Click me".to_owned(),
                position: (20, 20),
                ..Default::default()
            },
        );

        let new_self = Self { wnd, btn_hello };
        new_self.events(); // attach our events
        new_self
    }

    fn events(&self) {
        let wnd = self.wnd.clone(); // clone so it can be passed into the closure
        self.btn_hello.on().bn_clicked(move || {
            wnd.hwnd().SetWindowText("Hello, world!")?;
            Ok(())
        });
    }
}

License

Licensed under MIT license, see LICENSE.md for details.

	#[repr(C)]
	#[derive(Clone)]
	pub struct MSG {
	pub hwnd: HWND,
	pub message: co::WM,
	pub wParam: usize,
	pub lParam: isize,
	pub time: u32,
	pub pt: POINT,
	lPrivate: u32,
	}

	/// [`DispatchMessage`](https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-dispatchmessagew)
	/// function.
	#[cfg_attr(docsrs, doc(cfg(feature = "user")))]
	pub fn DispatchMessage(msg: &MSG) -> isize {

	/// [`CreateWindowEx`](https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-createwindowexw)
	/// static method.
	fn CreateWindowEx(
	ex_style: co::WS_EX,
	class_name: AtomStr,
	title: Option<&str>,
	style: co::WS,
	pos: POINT,
	size: SIZE,
	hwnd_parent: Option<HWND>,
	hmenu: IdMenu,
	hinstance: HINSTANCE,
	lparam: Option<isize>) -> WinResult<HWND>

	pub fn SendMessage<M: MsgSend>(self, uMsg: M) -> M::RetType {
	let wmAny = uMsg.as_generic_wm();
	uMsg.convert_ret(
	unsafe {
	user32::SendMessageW(
	self.ptr, wmAny.msg_id.0, wmAny.wparam, wmAny.lparam,
	)
	},
	)
	}

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