Fixed Listboxes on Mac OS X having an initial selection.

listbox.go

@@ -148,6 +148,8 @@ func (l *Listbox) make(window *sysData) (err error) {
 	for _, s := range l.initItems {
 		l.sysData.append(s)
 	}
+	// some platforms automatically select an item; undo that
+	l.sysData.selectIndices(nil)
 	l.created = true
 	return nil
 }

listbox_darwin.go

@@ -241,6 +241,7 @@ var (
 	_selectedRowIndexes = sel_getUid("selectedRowIndexes")
 	_count = sel_getUid("count")
 	_numberOfRows = sel_getUid("numberOfRows")
+	_deselectAll = sel_getUid("deselectAll:")
 )
 
 func makeListbox(parentWindow C.id, alternate bool) C.id {
@@ -315,3 +316,12 @@ func deleteListbox(listbox C.id, index int) {
 func listboxLen(listbox C.id) int {
 	return int(C.objc_msgSend_intret_noargs(listboxInScrollView(listbox), _numberOfRows))
 }
+
+func selectListboxIndices(id C.id, indices []int) {
+	listbox := listboxInScrollView(id)
+	if len(indices) == 0 {
+		C.objc_msgSend_id(listbox, _deselectAll, listbox)
+		return
+	}
+	panic("selectListboxIndices() > 0 not yet implemented (TODO)")
+}

sysdata.go

@@ -41,6 +41,7 @@ var _xSysData interface {
 	len() int
 	setAreaSize(int, int)
 	selectIndex(int)
+	selectIndices([]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

@@ -34,6 +34,7 @@ type classData struct {
 	delete		func(id C.id, index int)
 	len			func(id C.id) int
 	selectIndex	func(id C.id, index int, alternate bool)
+	selectIndices	func(id C.id, indices []int)
 }
 
 var (
@@ -304,6 +305,7 @@ var classTypes = [nctypes]*classData{
 		selTexts:		selectedListboxTexts,
 		delete:		deleteListbox,
 		len:			listboxLen,
+		selectIndices:	selectListboxIndices,
 	},
 	c_progressbar:		&classData{
 		make:		func(parentWindow C.id, alternate bool) C.id {
@@ -571,3 +573,13 @@ func (s *sysData) selectIndex(index int) {
 	}
 	<-ret
 }
+
+func (s *sysData) selectIndices(indices []int) {
+	ret := make(chan struct{})
+	defer close(ret)
+	uitask <- func() {
+		classTypes[s.ctype].selectIndices(s.id, indices)
+		ret <- struct{}{}
+	}
+	<-ret
+}

sysdata_unix.go

@@ -363,3 +363,7 @@ func (s *sysData) setAreaSize(width int, height int) {
 func (s *sysData) selectIndex(index int) {
 	// TODO not yet implemented on Unix (added for Mac only right now)
 }
+
+func (s *sysData) selectIndices(indices []int) {
+	// TODO not yet implemented on Windows (added for Mac only right now)
+}

sysdata_windows.go

@@ -645,3 +645,7 @@ func (s *sysData) setAreaSize(width int, height int) {
 func (s *sysData) selectIndex(index int) {
 	// TODO not yet implemented on Windows (added for Mac only right now)
 }
+
+func (s *sysData) selectIndices(indices []int) {
+	// TODO not yet implemented on Windows (added for Mac only right now)
+}

todo.md

@@ -1,5 +1,4 @@
 important things:
-- NSTableViews start out with an initial selection (which is against our docs)
 - 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)
 - some Cocoa controls don't seem to resize correctly: Buttons have space around the edges
 - LineEdit heights on Windows seem too big; either that or LineEdit, Button, and Label text is not vertically centered properly