Checked to see if the previous commit worked after removing the leftover Combobox selectIndex() code; it does. Removed the dummy code from the Windows and GTK+ backends as well.

combobox.go

@@ -143,8 +143,6 @@ func (c *Combobox) make(window *sysData) (err error) {
 	for _, s := range c.initItems {
 		c.sysData.append(s)
 	}
-	// some platforms automatically select an item; undo that
-	c.sysData.selectIndex(-1)
 	c.created = true
 	return nil
 }

combobox_darwin.m

@@ -54,7 +54,7 @@ id makeCombobox(BOOL editable)
 #define BIND bind:comboboxBinding toObject:ac withKeyPath:comboboxKeyPath options:nil
 // for NSPopUpButton, we need a little extra work to make it respect the NSArrayController's selection behavior properties
 // thanks to stevesliva (http://stackoverflow.com/questions/23715275/cocoa-how-do-i-suppress-nspopupbutton-automatic-selection-synchronization-nsar)
-// TODO where in the docs does it say that NSArrayController has a keyPath of selectionIndex? it's not in the Cocoa Bindings Reference
+// note: selectionIndex isn't listed in the Cocoa Bindings Reference for NSArrayController under exposed bindings, but is in the Cocoa Bindings Programming Topics under key-value observant properties, so we can still bind to it
 #define BINDSEL bind:@"selectedIndex" toObject:ac withKeyPath:@"selectionIndex" options:nil
 
 	if (!editable) {

objc_darwin.h

@@ -103,7 +103,6 @@ extern void buttonSetTargetAction(id, id);
 extern void buttonSetText(id, id);
 extern id buttonText(id);
 extern id makeCheckbox(void);
-extern void comboboxSelectIndex(id, BOOL, intptr_t);
 extern id makeLineEdit(BOOL);
 extern void lineeditSetText(id, id);
 extern id lineeditText(id);

sysdata.go

@@ -40,7 +40,6 @@ var _xSysData interface {
 	setProgress(int)
 	len() int
 	setAreaSize(int, int)
-	selectIndex(int)
 } = &sysData{}		// this line will error if there's an inconsistency
 
 // signal sends the event signal. This raise is done asynchronously to avoid deadlocking the UI task.

sysdata_darwin.go

@@ -31,7 +31,6 @@ type classData struct {
 	selTexts		func(id C.id) []string
 	delete		func(id C.id, index int)
 	len			func(id C.id) int
-	selectIndex	func(id C.id, index int, alternate bool)
 }
 
 func addControl(parentWindow C.id, control C.id) {
@@ -135,9 +134,6 @@ var classTypes = [nctypes]*classData{
 		len:			func(id C.id) int {
 			return int(C.comboboxLen(id))
 		},
-		selectIndex:	func(id C.id, index int, alternate bool) {
-			C.comboboxSelectIndex(id, toBOOL(alternate), C.intptr_t(index))
-		},
 	},
 	c_lineedit:		&classData{
 		make:		func(parentWindow C.id, alternate bool, s *sysData) C.id {
@@ -406,13 +402,3 @@ func (s *sysData) setAreaSize(width int, height int) {
 	}
 	<-ret
 }
-
-func (s *sysData) selectIndex(index int) {
-	ret := make(chan struct{})
-	defer close(ret)
-	uitask <- func() {
-		classTypes[s.ctype].selectIndex(s.id, index, s.alternate)
-		ret <- struct{}{}
-	}
-	<-ret
-}

sysdata_darwin.m

@@ -139,11 +139,6 @@ id makeCheckbox(void)
 	return checkbox;
 }
 
-void comboboxSelectIndex(id combobox, BOOL editable, intptr_t index)
-{
-	// TODO remove
-}
-
 id makeLineEdit(BOOL password)
 {
 	if (password)

sysdata_unix.go

@@ -362,7 +362,3 @@ func (s *sysData) setAreaSize(width int, height int) {
 	}
 	<-ret
 }
-
-func (s *sysData) selectIndex(index int) {
-	// TODO not yet implemented on Unix (added for Mac only right now)
-}

sysdata_windows.go

@@ -643,7 +643,3 @@ func (s *sysData) setAreaSize(width int, height int) {
 	}
 	<-ret
 }
-
-func (s *sysData) selectIndex(index int) {
-	// TODO not yet implemented on Windows (added for Mac only right now)
-}

todo.md

@@ -1,8 +1,6 @@
 important things:
 - NSComboBox scans the entered text to see if it matches one of the items and returns the index of that item if it does; find out how to suppress this so that it returns -1 unless the item was chosen from the list (like the other platforms)
 	- asked: http://stackoverflow.com/questions/23046414/cocoa-how-do-i-get-nscombobox-indexofselecteditem-to-return-1-if-the-user-m
-- Mac OS X forces items selected when changing the NSPopUpButton (noneditable Combobox) lists; figure out how to inhibit this
-	- asked: http://stackoverflow.com/questions/23715275/cocoa-how-do-i-suppress-nspopupbutton-automatic-selection-synchronization-nsar
 
 super ultra important things:
 - 10.6 also spits a bunch of NSNoAutoreleasePool() debug log messages even though I thoguht I had everything in an NSAutoreleasePool...