ImApp 2.0.1

ImApp

ImApp is a lightweight C# application framework for building native desktop applications with Dear ImGui, GLFW, and OpenGL.

It provides a small application/window layer while keeping Dear ImGui as the main UI API.

Status: Early development

Features

• Native desktop windows via GLFW
• Dear ImGui integration
• OpenGL rendering
• Configurable window options
• Borderless and resizable windows
• Maximized windows
• Transparent windows
• Topmost windows
• Mouse passthrough
• Dear ImGui docking
• Optional full-window host
• Target FPS limiter
• Embedded Noto Sans font
• .NET 10

Requirements

• .NET 10 SDK/runtime
• OpenGL 3.2+
• GLFW-compatible desktop environment

Installation

dotnet add package ImApp

Or:

<PackageReference Include="ImApp" Version="0.2.0" />

Quick Start

using Hexa.NET.ImGui;
using ImApp;

using var app = new App(new WindowOptions
{
    Title = "My Application",
    Width = 1000,
    Height = 700
});

app.Run(() =>
{
    ImGui.Begin("Hello");

    ImGui.Text("Hello from ImApp!");

    if (ImGui.Button("Click me"))
        Console.WriteLine("Clicked!");

    ImGui.End();
});

Window Options

var options = new WindowOptions
{
    Title = "My Application",
    Width = 1000,
    Height = 700,

    Decorated = true,
    Resizable = true,
    Transparent = false,
    Topmost = false,
    Maximized = false,
    Visible = true,
    Focused = true,

    MousePassthrough = false,
    DockingEnabled = false,
    HostWindow = true,

    TargetFps = 144,
    FontSize = 17
};

Host Window

By default, ImApp creates a full-window ImGui host:

using var app = new App(new WindowOptions
{
    HostWindow = true
});

app.Run(() =>
{
    ImGui.Text("Hello from ImApp!");
});

Disable it when you want to manage the ImGui windows yourself:

using var app = new App(new WindowOptions
{
    HostWindow = false
});

app.Run(() =>
{
    ImGui.ShowDemoWindow();
});

Docking

using var app = new App(new WindowOptions
{
    Width = 1200,
    Height = 800,
    DockingEnabled = true
});

app.Run(() =>
{
    ImGui.ShowDemoWindow();
});

Transparent / Borderless Window

using var app = new App(new WindowOptions
{
    Decorated = false,
    Transparent = true,
    MousePassthrough = true
});

Font

ImApp includes Noto Sans Regular and loads it automatically.

Change the font size with:

using var app = new App(new WindowOptions
{
    FontSize = 18
});

Dependencies

ImApp is built on:

• Dear ImGui
• Hexa.NET.ImGui
• Hexa.NET.GLFW
• Hexa.NET.OpenGL
• Hexa.NET.ImGui.Backends.GLFW
• Hexa.NET.ImGui.Backends.OpenGL3
• HexaGen.Runtime

License

MIT