XUniWindowController

XUniWindowController is a Unity native plugin that provides comprehensive standalone application window control for Windows and macOS builds.

It allows you to control window transparency, click-through, topmost/bottommost z-order, maximize, file drop, native file dialogs, and multi-monitor window fitting — all from C# scripts through a simple Unity component.

Features

• Window Transparency — Alpha blending or ColorKey-based transparency
• Click-Through — Make the window ignore mouse events
• Z-Order Control — Set window topmost, bottommost, or normal
• Maximize / Restore — Themed maximize and restore
• Borderless Mode — Hide the title bar and border
• Window Position & Size — Get/set window position and size
• Multi-Monitor Support — Fit window to any connected display
• File Drop — Receive file paths from drag-and-drop
• Native File Dialogs — Open and save file dialogs (Windows/macOS native)
• Drag Move — Drag the window by any UI element

Requirements

• Unity 2022.3 or later
• Windows or macOS standalone build target

Installation

Via Package Manager

1. Open Window > Package Manager
2. Click the + button > Add package from git URL
3. Enter the repository URL

Via disk (local package)

1. Copy the com.lrss3.xuniwindowcontroller folder to your project's Packages/ directory
2. Package Manager will automatically pick it up

Getting Started

1. Add a UniWindowController component to any GameObject in your scene (or use the prefab from samples)
2. Configure the Inspector properties:
   • Is Transparent — Enable window transparency
   • Is Topmost — Keep window on top
   • Hit Test Type — Choose opacity-based or raycast-based click-through detection
3. Call methods or toggle properties at runtime:

var winc = UniWindowController.current;
winc.isTransparent = true;    // Enable transparency
winc.isTopmost = true;        // Keep on top
winc.isClickThrough = false;  // Disable click-through

Samples

The package includes 5 sample scenes:

Sample	Description
Menu	Navigation menu for browsing all samples
SimpleSample	Minimal window control setup
UiSample	Full UI with toggles, sliders, dropdowns for all features
Fullscreen	Fullscreen mode + right-click context menu + 3D scene
FileDialog	Native open/save file dialog demonstration

Import samples via Package Manager > XUniWindowController > Samples.

How It Works

On Windows, the plugin uses LibUniWinC.dll (C++ Win32 API) to call:

• SetWindowLong — modify window styles
• SetWindowPos — control z-order and position
• DwmExtendFrameIntoClientArea — DWM transparency
• SetLayeredWindowAttributes — layered window transparency
• DragAcceptFiles / window subclassing — file drop handling

On macOS, the plugin uses LibUniWinC.bundle (Swift / Cocoa) to call:

• NSWindow.styleMask — borderless mode
• NSWindow.level — z-order control
• NSWindow.isOpaque / backgroundColor — transparency
• NSDraggingDestination protocol — file drop
• NSOpenPanel / NSSavePanel — native dialogs

License

This package is based on UniWindowController by Kirurobo, licensed under the MIT License.