91 lines
2.4 KiB
Go
91 lines
2.4 KiB
Go
// 28 february 2014
|
|
package ui
|
|
|
|
import (
|
|
"fmt"
|
|
"runtime"
|
|
"unsafe"
|
|
)
|
|
|
|
// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
|
|
// #include "objc_darwin.h"
|
|
import "C"
|
|
|
|
// temporary for now
|
|
func msgBox(string, string){}
|
|
func msgBoxError(string, string){}
|
|
|
|
var uitask chan func()
|
|
|
|
var (
|
|
_NSAutoreleasePool = objc_getClass("NSAutoreleasePool")
|
|
_NSValue = objc_getClass("NSValue")
|
|
|
|
_valueWithPointer = sel_getUid("valueWithPointer:")
|
|
_performSelectorOnMainThread =
|
|
sel_getUid("performSelectorOnMainThread:withObject:waitUntilDone:")
|
|
_pointerValue = sel_getUid("pointerValue")
|
|
_run = sel_getUid("run")
|
|
)
|
|
|
|
func ui(main func()) error {
|
|
runtime.LockOSThread()
|
|
|
|
uitask = make(chan func())
|
|
|
|
NSApp, 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 {
|
|
// we need to make an NSAutoreleasePool, otherwise we get leak warnings on stderr
|
|
pool := objc_new(_NSAutoreleasePool)
|
|
fp := C.objc_msgSend_ptr(_NSValue, _valueWithPointer,
|
|
unsafe.Pointer(&f))
|
|
C.objc_msgSend_sel_id_bool(
|
|
appDelegate,
|
|
_performSelectorOnMainThread,
|
|
_uitask,
|
|
fp,
|
|
C.BOOL(C.YES)) // wait so we can properly drain the autorelease pool; on other platforms we wind up waiting anyway (since the main thread can only handle one thing at a time) so
|
|
objc_release(pool)
|
|
}
|
|
}()
|
|
|
|
go main()
|
|
|
|
C.objc_msgSend_noargs(NSApp, _run)
|
|
return nil
|
|
}
|
|
|
|
// TODO move to init_darwin.go?
|
|
|
|
var (
|
|
_NSApplication = objc_getClass("NSApplication")
|
|
|
|
_sharedApplication = sel_getUid("sharedApplication")
|
|
_setActivationPolicy = sel_getUid("setActivationPolicy:")
|
|
)
|
|
|
|
func initCocoa() (NSApp C.id, err error) {
|
|
NSApp = C.objc_msgSend_noargs(_NSApplication, _sharedApplication)
|
|
r := C.objc_msgSend_int(NSApp, _setActivationPolicy,
|
|
0) // NSApplicationActivationPolicyRegular
|
|
if C.BOOL(uintptr(unsafe.Pointer(r))) != C.BOOL(C.YES) {
|
|
err = fmt.Errorf("error setting NSApplication activation policy (basically identifies our program as a separate program; needed for several things, such as Dock icon, menu, window resizing, etc.) (unknown reason)")
|
|
return
|
|
}
|
|
err = mkAppDelegate()
|
|
return
|
|
}
|
|
|
|
//export appDelegate_uitask
|
|
func appDelegate_uitask(self C.id, sel C.SEL, arg C.id) {
|
|
p := C.objc_msgSend_noargs(arg, _pointerValue)
|
|
f := (*func ())(unsafe.Pointer(p))
|
|
(*f)()
|
|
}
|