VecGui

VecGui is a high-performance, GPU-accelerated vector GUI framework for C++, heavily inspired by the Godot Engine's UI architecture.

Note: This project is currently under heavy development and APIs are subject to change.

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🚀 Why VecGui?

Most C++ GUI frameworks are either immediate-mode (like ImGui) which can be hard to manage for complex layouts, or bitmap-based which suffer from blurriness on HiDPI screens. VecGui offers a middle ground:

• Godot-like Workflow: If you've used Godot, you'll feel right at home. It uses a Node-based scene tree, signals ( coming soon), and a powerful container-based layout system.
• Pure Vector Rendering: Powered by Pathfinder, every UI element is rendered as a vector shape on the GPU. This means perfect antialiasing and infinite scalability without any loss in quality.
• Modern C++: Built with C++17/20, utilizing smart pointers and modern memory management practices.

✨ Features

• 🌲 Node-based Scene Management: Everything is a Node. Manage your UI hierarchy intuitively.
• 📐 Advanced Layout Containers: Includes HBoxContainer, VBoxContainer, GridContainer, and SplitContainer with flexible sizing flags (Fill, Shrink, Expand).
• 🎨 High-Quality Rendering: Support for gradients, complex paths, and subpixel text positioning via Pathfinder.
• 🖥️ Multi-Window & HiDPI: Native support for multiple windows and arbitrary display scaling.
• 🌐 Internationalization (i18n): Built-in TranslationServer for localized applications.
• 🤖 Cross-platform: Works on Windows, Linux, macOS, and Android.

📦 Quick Start

Creating a simple UI with a button in a horizontal container:

#include "src/app.h"

using namespace vecgui;

class MyScene : public Node {
    void custom_ready() override {
        // 1. Create a container
        auto hbox = std::make_shared<HBoxContainer>();
        hbox->set_separation(10);
        hbox->set_position({100, 100});
        add_child(hbox);

        // 2. Add a button
        auto button = std::make_shared<Button>();
        button->set_text("Click Me!");
        button->container_sizing.flag_h = ContainerSizingFlag::Fill;
        hbox->add_child(button);
    }
};

int main() {
    // Initialize App with 1280x720 window
    App app({1280, 720}, true); 
    
    // Add your scene to the tree
    app.get_tree_root()->add_child(std::make_shared<MyScene>());
    
    // Start the main loop
    app.main_loop();
    
    return 0;
}

🖼️ Gallery

Buttons	Widgets

Layout System	Text & i18n

🛠️ Building

VecGui uses CMake. Ensure you have the necessary Vulkan/OpenGL SDKs installed.

mkdir build && cd build
cmake ..
cmake --build .

🗺️ Roadmap

• Complete Signal/Slot implementation for event handling.
• Theme and StyleBox resource system.
• More complex widgets: Tree, TabContainer, GraphEdit.
• Animation system (Tweens).

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Inspired by Godot. Powered by Pathfinder.