From 0e2c1d23140bbc92100638e5e66ca9eb75ea7b4b Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Sat, 15 Feb 2014 12:06:29 -0500
Subject: [PATCH] Added sysData.insertBefore().

---
 sysdata.go         |  4 +++-
 sysdata_windows.go | 25 ++++++++++++++++++++++---
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/sysdata.go b/sysdata.go
index eee6c88..a331ddc 100644
--- a/sysdata.go
+++ b/sysdata.go
@@ -36,7 +36,9 @@ func (c *cSysData) text() (string, error) {
 func (c *cSysData) append(string) error {
 	panic(runtime.GOOS + " sysData does not define append()")
 }
-// TODO insertAfter
+func (c *cSysData) insertBefore(string, int) error {
+	panic(runtime.GOOS + " sysData does not define insertBefore()")
+}
 // TODO selectedIndex, selectedIndices, selectedTexts
 
 const (
diff --git a/sysdata_windows.go b/sysdata_windows.go
index 5c1345d..8d9d7ed 100644
--- a/sysdata_windows.go
+++ b/sysdata_windows.go
@@ -25,7 +25,7 @@ type classData struct {
 	mkid				bool
 	altStyle			uint32
 	appendMsg		uintptr
-	insertAfterMsg		uintptr
+	insertBeforeString	uintptr
 	deleteMsg			uintptr
 }
 
@@ -53,7 +53,7 @@ var classTypes = [nctypes]*classData{
 		xstyle:			0 | controlxstyle,
 		altStyle:			_CBS_DROPDOWN | _CBS_AUTOHSCROLL | controlstyle,
 		appendMsg:		_CB_ADDSTRING,
-		insertAfterMsg:		_CB_INSERTSTRING,
+		insertBeforeMsg:	_CB_INSERTSTRING,
 		deleteMsg:		_CB_DELETESTRING,
 	},
 	c_lineedit:	&classData{
@@ -73,7 +73,7 @@ var classTypes = [nctypes]*classData{
 		xstyle:			0 | controlxstyle,
 		altStyle:			_LBS_EXTENDEDSEL | _WS_VSCROLL | controlstyle,
 		appendMsg:		_LB_ADDSTRING,
-		insertAfterMsg:		_LB_INSERTSTRING,
+		insertBeforeMsg:	_LB_INSERTSTRING,
 		deleteMsg:		_LB_DELETESTRING,
 	},
 }
@@ -311,3 +311,22 @@ func (s *sysData) append(what string) (err error) {
 	// TODO error handling
 	return nil
 }
+
+// TODO figure out how to handle errors
+func (s *sysData) insertBefore(what string, index int) (err error) {
+	ret := make(chan uiret)
+	defer close(ret)
+	uitask <- &uimsg{
+		call:		_sendMessage,
+		p:		[]uintptr{
+			uintptr(s.hwnd),
+			uintptr(classTypes[s.ctype].insertBeforeMsg),
+			uintptr(_WPARAM(index)),
+			uintptr(_LPARAM(unsafe.Pointer(syscall.StringToUTF16Ptr(what)))),
+		},
+		ret:		ret,
+	}
+	<-ret
+	// TODO error handling
+	return nil
+}