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// 27 february 2014
package main
import (
"fmt"
"time"
)
// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
// #include <stdlib.h>
// #include "objc_darwin.h"
import "C"
var (
_NSApplication = objc_getClass("NSApplication")
_sharedApplication = sel_getUid("sharedApplication")
_run = sel_getUid("run")
)
var NSApp C.id
var delegate C.id
var notesel C.SEL
func init() {
// need an NSApplication first - see https://github.com/TooTallNate/NodObjC/issues/21
NSApp = C.objc_msgSend_noargs(_NSApplication, _sharedApplication)
selW := sel_getUid("windowShouldClose:")
selB := sel_getUid("buttonClicked:")
selN := sel_getUid("gotNotification:")
mk("hello", selW, selB, selN)
delegate = objc_alloc(objc_getClass("hello"))
notesel = selN
}
const (
NSBorderlessWindowMask = 0
NSTitledWindowMask = 1 << 0
NSClosableWindowMask = 1 << 1
NSMiniaturizableWindowMask = 1 << 2
NSResizableWindowMask = 1 << 3
NSTexturedBackgroundWindowMask = 1 << 8
)
const (
// NSBackingStoreRetained = 0 // "You should not use this mode."
// NSBackingStoreNonretained = 1 // "You should not use this mode."
NSBackingStoreBuffered = 2
)
const (
NSRoundedBezelStyle = 1
// TODO copy in the rest?
)
var (
_NSAutoreleasePool = objc_getClass("NSAutoreleasePool")
_performSelectorOnMainThread =
sel_getUid("performSelectorOnMainThread:withObject:waitUntilDone:")
)
func notify(source string) {
// we need to make an NSAutoreleasePool, otherwise we get leak warnings on stderr
pool := objc_new(_NSAutoreleasePool)
src := toNSString(source)
C.objc_msgSend_sel_id_bool(
delegate,
_performSelectorOnMainThread,
notesel,
src,
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)
}
var (
_NSWindow = objc_getClass("NSWindow")
_NSButton = objc_getClass("NSButton")
_initWithContentRect = sel_getUid("initWithContentRect:styleMask:backing:defer:")
_setDelegate = sel_getUid("setDelegate:")
_makeKeyAndOrderFront = sel_getUid("makeKeyAndOrderFront:")
_contentView = sel_getUid("contentView")
_initWithFrame = sel_getUid("initWithFrame:")
_setTarget = sel_getUid("setTarget:")
_setAction = sel_getUid("setAction:")
_setBezelStyle = sel_getUid("setBezelStyle:")
_addSubview = sel_getUid("addSubview:")
)
func main() {
style := uintptr(NSTitledWindowMask | NSClosableWindowMask)
backing := uintptr(NSBackingStoreBuffered)
deferx := C.BOOL(C.YES)
window := objc_alloc(_NSWindow)
window = objc_msgSend_rect_uint_uint_bool(window,
_initWithContentRect,
100, 100, 320, 240,
style, backing, deferx)
C.objc_msgSend_id(window, _makeKeyAndOrderFront, window)
C.objc_msgSend_id(window, _setDelegate, delegate)
windowView := C.objc_msgSend_noargs(window, _contentView)
button := objc_alloc(_NSButton)
button = objc_msgSend_rect(button,
_initWithFrame,
20, 20, 200, 200)
C.objc_msgSend_id(button, _setTarget, delegate)
C.objc_msgSend_sel(button,
_setAction,
sel_getUid("buttonClicked:"))
objc_msgSend_uint(button, _setBezelStyle, NSRoundedBezelStyle)
C.objc_msgSend_id(windowView, _addSubview, button)
go func() {
for {
<-time.After(5 * time.Second)
fmt.Println("five seconds passed; sending notification...")
notify("timer")
}
}()
C.objc_msgSend_noargs(NSApp, _run)
}
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