/
gui.go
69 lines (63 loc) · 1.08 KB
/
gui.go
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package gui
import (
"github.com/gordonklaus/glfw"
gl "github.com/chsc/gogl/gl21"
"log"
)
var do = make(chan func(), 1)
var windows []*Window
// must be called on the main goroutine, which will run on the main thread because glfw calls runtime.LockOSThread()
func Run(init func()) error {
glfw.OnError(func(err error) {
log.Println("GLFW: ", err)
})
if err := glfw.Init(); err != nil {
return err
}
defer glfw.Terminate()
if err := gl.Init(); err != nil {
return err
}
go init()
for len(windows) == 0 {
(<-do)()
}
for len(windows) > 0 {
glfw.WaitEvents()
select {
case f := <-do:
f()
default:
}
}
return nil
}
func doMain(f func()) {
done := make(chan bool)
do <- func() {
f()
done <- true
}
glfw.PostEmptyEvent()
<-done
}
func closeWindow(w *Window) {
for i, w2 := range windows {
if w2 == w {
windows = append(windows[:i], windows[i+1:]...)
break
}
}
w.Do(func() { w.close = true })
w.w.Destroy()
if len(windows) > 0 {
windows[0].w.Show()
}
}
func Quit() {
go doMain(func() {
for len(windows) > 0 {
closeWindow(windows[0])
}
})
}