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// 28 february 2014
package ui
import (
"fmt"
"runtime"
"unsafe"
)
// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
// #include "objc_darwin.h"
// #include "delegateuitask_darwin.h"
import "C"
var uitask chan func()
func ui(main func()) error {
runtime.LockOSThread()
uitask = make(chan func())
err := initCocoa()
if err != nil {
return err
}
// Cocoa must run on the first thread created by the program, so we run our dispatcher on another thread instead
go func() {
for f := range uitask {
C.douitask(appDelegate, unsafe.Pointer(&f))
}
}()
go func() {
main()
uitask <- func() {
C.breakMainLoop()
}
}()
C.cocoaMainLoop()
return nil
}
// TODO move to init_darwin.go?
func initCocoa() (err error) {
C.initBleh() // initialize bleh_darwin.m functions
makeAppDelegate()
if C.initCocoa(appDelegate) != C.YES {
return fmt.Errorf("error setting NSApplication activation policy (basically identifies our program as a separate program; needed for several things, such as Dock icon, application menu, window resizing, etc.) (unknown reason)")
}
return nil
}
//export appDelegate_uitask
func appDelegate_uitask(p unsafe.Pointer) {
f := (*func ())(unsafe.Pointer(p))
(*f)()
}
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