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1cd495b522
bindings/go/: - imgui_bridge.h/.cpp: Thin C API bridge (extern C) wrapping C++ ImGui - imgui.go: Go cgo package (CreateContext, NewFrame, Begin, Button, SliderFloat, SliderInt, Checkbox, ColorEdit3, Text, Combo, etc.) - go.mod: Module definition - README.md: Full docs with usage, building, and API reference examples/example_golang/: - main.go: Null-mode example showing ImGui from Go - go.mod: Module with replace directive for local bindings - Makefile: Build/run/clean targets Go 1.26.5 verified working on this host. CGO_ENABLED=1 required (plus a C++ compiler like g++ for the bridge compilation).
106 lines
2.8 KiB
Go
106 lines
2.8 KiB
Go
// Package main demonstrates using Dear ImGui from Go.
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// This example runs ImGui in a headless "null" mode — it creates a context,
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// runs 20 frames of rendering, and prints the output.
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//
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// For a full graphical example, pair this with a Go windowing library
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// (e.g., GLFW, SDL2) and a renderer backend (OpenGL3, Vulkan).
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//
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// Build requirements:
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// - C++ compiler (g++ or clang++) on PATH
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// - CGO_ENABLED=1 (default when a C compiler is available)
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//
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// Build:
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// cd examples/example_golang
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// CGO_ENABLED=1 go build -o imgui_go_example
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// ./imgui_go_example
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//
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// Copyright (c) 2024 OwlLogics / imgui_xl
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// Licensed under MIT
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package main
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import (
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"fmt"
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imgui "github.com/Turtle-PB/imgui_xl/bindings/go"
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)
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func main() {
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fmt.Println("=== Dear ImGui Go Example ===")
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fmt.Printf("ImGui Version: %s\n", imgui.Version())
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fmt.Println()
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// Create context
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imgui.CreateContext()
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defer imgui.DestroyContext()
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// Use dark theme
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imgui.StyleColorsDark()
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// Run 20 frames in "null" mode (no rendering output)
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showDemo := true
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showAnother := false
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floatVal := 0.0
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counter := 0
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for frame := 0; frame < 20; frame++ {
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imgui.NewFrame()
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// Show the ImGui demo window
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imgui.ShowDemoWindow(&showDemo)
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// Create a custom window
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visible := imgui.Begin("Hello from Go!", &showDemo)
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if visible {
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imgui.Text(fmt.Sprintf("Frame: %d", frame))
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imgui.Text(fmt.Sprintf("FPS: %.1f", imgui.GetFramerate()))
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imgui.Separator()
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imgui.Checkbox("Another Window", &showAnother)
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f32Val := float32(floatVal)
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if imgui.SliderFloat("Float", &f32Val, 0.0, 1.0) {
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floatVal = float64(f32Val)
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}
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if imgui.Button("Click Me", 0, 0) {
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counter++
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fmt.Printf(" Button clicked! Count: %d\n", counter)
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}
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imgui.SameLine(0, 4)
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imgui.Text(fmt.Sprintf("counter = %d", counter))
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}
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imgui.End()
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// Show another window toggled by checkbox
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if showAnother {
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visible := imgui.Begin("Another Window", &showAnother)
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if visible {
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imgui.Text("Hello from the second window!")
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imgui.Text("This window can be closed via the checkbox.")
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}
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imgui.End()
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}
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imgui.Render()
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if frame == 0 || frame == 9 || frame == 19 {
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w, h := imgui.GetDisplaySize()
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fmt.Printf("Frame %2d: Render complete (display: %.0fx%.0f, FPS: %.1f)\n",
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frame, w, h, imgui.GetFramerate())
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}
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}
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fmt.Println()
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fmt.Println("=== Done! ===")
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fmt.Println("20 frames rendered in null mode.")
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fmt.Println()
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fmt.Println("To build a graphical Go app with ImGui:")
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fmt.Println(" 1. Install a Go windowing lib: go get github.com/go-gl/glfw/v3.3/glfw")
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fmt.Println(" 2. Install an OpenGL Go lib: go get github.com/go-gl/gl/v4.1-core/gl")
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fmt.Println(" 3. Create a window, init OpenGL,")
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fmt.Println(" call imgui.CreateContext() + ImGui_ImplOpenGL3_Init()")
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fmt.Println(" 4. Loop: poll events -> NewFrame -> draw UI -> Render -> RenderDrawData")
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}
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