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Added the Windows implementation of Combobox/Listbox.Len().

This commit is contained in:
Pietro Gagliardi 2014-03-08 16:58:18 -05:00
parent 3aa59d4ab9
commit ce2645a83c
1 changed files with 23 additions and 0 deletions
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23
sysdata_windows.go
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@ -31,6 +31,7 @@ type classData struct {
selectedIndexMsg uintptr selectedIndexMsg uintptr
selectedIndexErr int selectedIndexErr int
addSpaceErr int addSpaceErr int
lenMsg uintptr
} }
const controlstyle = _WS_CHILD | _WS_VISIBLE | _WS_TABSTOP const controlstyle = _WS_CHILD | _WS_VISIBLE | _WS_TABSTOP
@ -65,6 +66,7 @@ var classTypes = [nctypes]*classData{
selectedIndexMsg: _CB_GETCURSEL, selectedIndexMsg: _CB_GETCURSEL,
selectedIndexErr: _CB_ERR, selectedIndexErr: _CB_ERR,
addSpaceErr: _CB_ERRSPACE, addSpaceErr: _CB_ERRSPACE,
lenMsg: _CB_GETCOUNT,
}, },
c_lineedit: &classData{ c_lineedit: &classData{
name: "EDIT", name: "EDIT",
@ -92,6 +94,7 @@ var classTypes = [nctypes]*classData{
selectedIndexMsg: _LB_GETCURSEL, selectedIndexMsg: _LB_GETCURSEL,
selectedIndexErr: _LB_ERR, selectedIndexErr: _LB_ERR,
addSpaceErr: _LB_ERRSPACE, addSpaceErr: _LB_ERRSPACE,
lenMsg: _LB_GETCOUNT,
}, },
c_progressbar: &classData{ c_progressbar: &classData{
name: _PROGRESS_CLASS, name: _PROGRESS_CLASS,
@ -524,3 +527,23 @@ func (s *sysData) setProgress(percent int) {
} }
<-ret <-ret
} }
func (s *sysData) len() int {
ret := make(chan uiret)
defer close(ret)
uitask <- &uimsg{
call: _sendMessage,
p: []uintptr{
uintptr(s.hwnd),
uintptr(classTypes[s.ctype].lenMsg),
uintptr(_WPARAM(0)),
uintptr(_LPARAM(0)),
},
ret: ret,
}
r := <-ret
if r.ret == uintptr(classTypes[s.ctype].selectedIndexErr) {
panic(fmt.Errorf("unexpected error return from sysData.len(); GetLastError() says %v", r.err))
}
return int(r.ret)
}