Separated initial text from sysData and fixed errors in the previous commits.

sysdata.go

@@ -8,12 +8,11 @@ import (
 // The sysData type contains all system data. It provides the system-specific underlying implementation. It is guaranteed to have the following by embedding:
 type cSysData struct {
 	ctype	int
-	text		string
 
 	// for Window
 	closing	chan struct{}
 }
-func (c *cSysData) make() error {
+func (c *cSysData) make(initText string) error {
 	panic(runtime.GOOS + " sysData does not define make()")
 }
 func (c *cSysData) show() error {

sysdata_windows.go

@@ -42,7 +42,7 @@ var classTypes = [nctypes]*classData{
 
 var (
 	cid _HMENU = 0
-	cidLock sys.Mutex
+	cidLock sync.Mutex
 )
 
 func nextID() _HMENU {
@@ -52,7 +52,7 @@ func nextID() _HMENU {
 	return cid
 }
 
-func (s *sysData) make() (err error) {
+func (s *sysData) make(initText string) (err error) {
 	ret := make(chan uiret)
 	defer close(ret)
 	ct := classTypes[s.ctype]
@@ -64,7 +64,7 @@ func (s *sysData) make() (err error) {
 		p:		[]uintptr{
 			uintptr(ct.xstyle),
 			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(ct.name))),
-			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(s.text))),
+			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(initText))),
 			uintptr(ct.style),
 			uintptr(_CW_USEDEFAULT),		// TODO
 			uintptr(_CW_USEDEFAULT),

sysdatacache_windows.go

@@ -9,9 +9,9 @@ import (
 // I need a way to get a sysData for a given HWND or a given HWND/control ID. So, this.
 
 var (
-	sysDatas = map[_HWND]*sdcEntry{}
+	sysDatas = map[_HWND]*sysData{}
 	sysDatasLock sync.Mutex
-	sysDataIDs = map[_HMENU]*sdcEntry{}
+	sysDataIDs = map[_HMENU]*sysData{}
 	sysDataIDsLock sync.Mutex
 )
 
@@ -21,7 +21,7 @@ func addSysData(hwnd _HWND, s *sysData) {
 	sysDatas[hwnd] = s
 }
 
-func addIDSysData(id _HMENU, s *sysData) {
+func addSysDataID(id _HMENU, s *sysData) {
 	sysDataIDsLock.Lock()
 	defer sysDataIDsLock.Unlock()
 	sysDataIDs[id] = s
@@ -36,11 +36,11 @@ func getSysData(hwnd _HWND) *sysData {
 	return nil
 }
 
-func getIDSysData(id _HMENU) *sysData {
+func getSysDataID(id _HMENU) *sysData {
 	sysDataIDsLock.Lock()
 	defer sysDataIDsLock.Unlock()
 	if ss, ok := sysDataIDs[id]; ok {
 		return ss
 	}
-	panic(fmt.Sprintf("getting nonexistent ID %d for HWND %d\n", id, hwnd))
+	panic(fmt.Sprintf("getting nonexistent ID %d\n", id))
 }

window.go

@@ -18,6 +18,7 @@ type Window struct {
 	created	bool
 	control	Control
 	sysData	*sysData
+	initText	string
 }
 
 // NewWindow creates a new window with the given title. The window is not constructed at the OS level until a call to Open().
@@ -26,9 +27,9 @@ func NewWindow(title string) *Window {
 		sysData:	&sysData{
 			cSysData:		cSysData{
 				ctype:	c_window,
-				text:		title,
 			},
 		},
+		initText:	title,
 	}
 }
 
@@ -54,7 +55,7 @@ func (w *Window) Open() (err error) {
 	// If the window has already been created, show it.
 	if !w.created {
 		w.sysData.closing = w.Closing
-		err = w.sysData.make()
+		err = w.sysData.make(w.initText)
 		if err != nil {
 			return err
 		}
@@ -82,6 +83,6 @@ func (w *Window) apply() error {
 func (w *Window) setParent(c Control) {
 	panic("Window.setParent() should never be called")
 }
-func (w *Window) setParentWindow(w *Window) {
+func (w *Window) setParentWindow(w2 *Window) {
 	panic("Window.setParent() should never be called")
 }