Implemented OpenFile() on Mac OS X.

redo/dialog_darwin.go

@@ -0,0 +1,19 @@
+// 19 august 2014
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "objc_darwin.h"
+import "C"
+
+func openFile() string {
+	fname := C.openFile()
+	if fname == nil {
+		return ""
+	}
+	defer C.free(unsafe.Pointer(fname))
+	return C.GoString(fname)
+}

redo/dialog_darwin.m

@@ -0,0 +1,29 @@
+// 19 august 2014
+
+#import "objc_darwin.h"
+#import <Cocoa/Cocoa.h>
+
+char *openFile(void)
+{
+	NSOpenPanel *op;
+	NSInteger ret;
+
+	op = [NSOpenPanel openPanel];
+	[op setCanChooseFiles:YES];
+	[op setCanChooseDirectories:NO];
+	[op setResolvesAliases:NO];
+	[op setAllowsMultipleSelection:NO];
+	[op setShowsHiddenFiles:YES];
+	[op setCanSelectHiddenExtension:NO];
+	[op setExtensionHidden:NO];
+	[op setAllowsOtherFileTypes:YES];
+	[op setTreatsFilePackagesAsDirectories:YES];
+	// disable custom events
+	// TODO doesn't seem to work
+	dispatch_suspend(dispatch_get_main_queue());
+	ret = [op runModal];
+	dispatch_resume(dispatch_get_main_queue());
+	if (ret != NSFileHandlingPanelOKButton)
+		return NULL;
+	return strdup([[[op URL] path] UTF8String]);
+}

redo/dialog_unix.go

@@ -1,3 +1,5 @@
+// +build !windows,!darwin
+
 // 19 august 2014
 
 package ui

redo/objc_darwin.h

@@ -128,4 +128,7 @@ extern void disableAutocorrect(id);
 /* imagerep_darwin.m */
 extern id toImageListImage(void *, intptr_t, intptr_t, intptr_t);
 
+/* dialog_darwin.m */
+extern char *openFile(void);
+
 #endif