Removed now-unused error returns from sysData.show() and sysData.hide().

sysdata.go

@@ -25,10 +25,10 @@ func (c *cSysData) make(initText string, window *sysData) error {
 func (c *cSysData) firstShow() error {
 	panic(runtime.GOOS + " sysData does not define firstShow()")
 }
-func (c *cSysData) show() error {
+func (c *cSysData) show() {
 	panic(runtime.GOOS + " sysData does not define show()")
 }
-func (c *cSysData) hide() error {
+func (c *cSysData) hide() {
 	panic(runtime.GOOS + " sysData does not define hide()")
 }
 func (c *cSysData) setText(text string) error {

sysdata_darwin.go

@@ -320,7 +320,7 @@ func (s *sysData) firstShow() error {
 	return nil
 }
 
-func (s *sysData) show() error {
+func (s *sysData) show() {
 	ret := make(chan struct{})
 	defer close(ret)
 	uitask <- func() {
@@ -328,10 +328,9 @@ func (s *sysData) show() error {
 		ret <- struct{}{}
 	}
 	<-ret
-	return nil
 }
 
-func (s *sysData) hide() error {
+func (s *sysData) hide() {
 	ret := make(chan struct{})
 	defer close(ret)
 	uitask <- func() {
@@ -339,7 +338,6 @@ func (s *sysData) hide() error {
 		ret <- struct{}{}
 	}
 	<-ret
-	return nil
 }
 
 func (s *sysData) setText(text string) error {

sysdata_unix.go

@@ -162,7 +162,7 @@ func (s *sysData) firstShow() error {
 	return nil
 }
 
-func (s *sysData) show() error {
+func (s *sysData) show() {
 	ret := make(chan struct{})
 	defer close(ret)
 	uitask <- func() {
@@ -170,10 +170,9 @@ func (s *sysData) show() error {
 		ret <- struct{}{}
 	}
 	<-ret
-	return nil
 }
 
-func (s *sysData) hide() error {
+func (s *sysData) hide() {
 	ret := make(chan struct{})
 	defer close(ret)
 	uitask <- func() {
@@ -181,7 +180,6 @@ func (s *sysData) hide() error {
 		ret <- struct{}{}
 	}
 	<-ret
-	return nil
 }
 
 func (s *sysData) setText(text string) error {

sysdata_windows.go

@@ -213,7 +213,7 @@ func (s *sysData) firstShow() error {
 	return nil
 }
 
-func (s *sysData) show() (err error) {
+func (s *sysData) show() {
 	ret := make(chan uiret)
 	defer close(ret)
 	uitask <- &uimsg{
@@ -225,20 +225,20 @@ func (s *sysData) show() (err error) {
 		ret:		ret,
 	}
 	<-ret
-	return nil
 }
 
-func (s *sysData) hide() (err error) {
+func (s *sysData) hide() {
 	ret := make(chan uiret)
 	defer close(ret)
-	// TODO figure out how to handle error
 	uitask <- &uimsg{
 		call:		_showWindow,
-		p:		[]uintptr{uintptr(s.hwnd), _SW_HIDE},
+		p:		[]uintptr{
+			uintptr(s.hwnd),
+			uintptr(_SW_HIDE),
+		},
 		ret:		ret,
 	}
 	<-ret
-	return nil
 }
 
 func (s *sysData) setText(text string) error {

todo.md

@@ -3,7 +3,6 @@ so I don't forget:
 - Control.Show()/Control.Hide()
 - Groupbox
 - see if we really need to track errors on a lot of places that report errors
-	- Window.Show()/Window.Hide() report errors due to UpdateWindow(), which can fail, but that is only called when the window is first opened: split that functionality out
 	- it appears GTK+ and Cocoa both either don't provide a convenient way to grab errors or you're not supposed to; I assume you're supposed to just assume everything works... but on Windows we check errors for functions that return errors, and there's no guarantee that only certian errors will be returned...
 - character-limited entry fields, numeric entry fields, multiline entry fields
 	- possible rename of LineEdit?