window_id.h

Go to the documentation of this file.

#pragma once
 
namespace osc { class App; }
 
namespace osc
{
    class WindowID final {
    public:
        // Default constructs a "null" `WindowID`.
        WindowID() = default;
 
        // Constructs a `WindowID` from a type-erased void pointer. This is mostly
        // used when `WindowID`s are stored by third-party libraries.
        explicit WindowID(void* handle) : handle_{handle} {}
 
        friend bool operator==(const WindowID&, const WindowID&) = default;
 
        // Converts a `WindowID` to a boolean, which can be used to check for
        // its nullstate.
        explicit operator bool () const { return handle_ != nullptr; }
 
        // Converts a `WindowID` to a type-erased void pointer. This is mostly used
        // when `WindowID`s are stored by third-party libraries.
        explicit operator void* () const { return handle_; }
 
        // Resets the state of the `WindowID` to the default-constructed (false-y) state.
        void reset() { handle_ = nullptr; }
 
    private:
        void* handle_ = nullptr;
    };
}