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-rw-r--r--prevlib/sysdata_windows.go525
1 files changed, 525 insertions, 0 deletions
diff --git a/prevlib/sysdata_windows.go b/prevlib/sysdata_windows.go
new file mode 100644
index 0000000..1d3541a
--- /dev/null
+++ b/prevlib/sysdata_windows.go
@@ -0,0 +1,525 @@
+// 11 february 2014
+
+package ui
+
+import (
+ "fmt"
+ "sync"
+ "syscall"
+ "unsafe"
+)
+
+type sysData struct {
+ cSysData
+
+ hwnd _HWND
+ children map[_HMENU]*sysData
+ nextChildID _HMENU
+ childrenLock sync.Mutex
+ isMarquee bool // for sysData.setProgress()
+ // unlike with GTK+ and Mac OS X, we're responsible for sizing Area properly ourselves
+ areawidth int
+ areaheight int
+ clickCounter clickCounter
+ lastfocus _HWND
+}
+
+type classData struct {
+ name *uint16
+ style uint32
+ xstyle uint32
+ altStyle uint32
+ storeSysData bool
+ doNotLoadFont bool
+ appendMsg uintptr
+ insertBeforeMsg uintptr
+ deleteMsg uintptr
+ selectedIndexMsg uintptr
+ selectedIndexErr uintptr
+ addSpaceErr uintptr
+ lenMsg uintptr
+}
+
+const controlstyle = _WS_CHILD | _WS_VISIBLE | _WS_TABSTOP
+const controlxstyle = 0
+
+var classTypes = [nctypes]*classData{
+ c_window: &classData{
+ name: stdWndClass,
+ style: _WS_OVERLAPPEDWINDOW,
+ xstyle: 0,
+ storeSysData: true,
+ doNotLoadFont: true,
+ },
+ c_button: &classData{
+ name: toUTF16("BUTTON"),
+ style: _BS_PUSHBUTTON | controlstyle,
+ xstyle: 0 | controlxstyle,
+ },
+ c_checkbox: &classData{
+ name: toUTF16("BUTTON"),
+ // don't use BS_AUTOCHECKBOX because http://blogs.msdn.com/b/oldnewthing/archive/2014/05/22/10527522.aspx
+ style: _BS_CHECKBOX | controlstyle,
+ xstyle: 0 | controlxstyle,
+ },
+ c_combobox: &classData{
+ name: toUTF16("COMBOBOX"),
+ style: _CBS_DROPDOWNLIST | _WS_VSCROLL | controlstyle,
+ xstyle: 0 | controlxstyle,
+ altStyle: _CBS_DROPDOWN | _CBS_AUTOHSCROLL | _WS_VSCROLL | controlstyle,
+ appendMsg: _CB_ADDSTRING,
+ insertBeforeMsg: _CB_INSERTSTRING,
+ deleteMsg: _CB_DELETESTRING,
+ selectedIndexMsg: _CB_GETCURSEL,
+ selectedIndexErr: negConst(_CB_ERR),
+ addSpaceErr: negConst(_CB_ERRSPACE),
+ lenMsg: _CB_GETCOUNT,
+ },
+ c_lineedit: &classData{
+ name: toUTF16("EDIT"),
+ // WS_EX_CLIENTEDGE without WS_BORDER will apply visual styles
+ // thanks to MindChild in irc.efnet.net/#winprog
+ style: _ES_AUTOHSCROLL | controlstyle,
+ xstyle: _WS_EX_CLIENTEDGE | controlxstyle,
+ altStyle: _ES_PASSWORD | _ES_AUTOHSCROLL | controlstyle,
+ },
+ c_label: &classData{
+ name: toUTF16("STATIC"),
+ // SS_NOPREFIX avoids accelerator translation; SS_LEFTNOWORDWRAP clips text past the end
+ // controls are vertically aligned to the top by default (thanks Xeek in irc.freenode.net/#winapi)
+ // also note that tab stops are remove dfor labels
+ style: (_SS_NOPREFIX | _SS_LEFTNOWORDWRAP | controlstyle) &^ _WS_TABSTOP,
+ xstyle: 0 | controlxstyle,
+ // MAKE SURE THIS IS THE SAME
+ altStyle: (_SS_NOPREFIX | _SS_LEFTNOWORDWRAP | controlstyle) &^ _WS_TABSTOP,
+ },
+ c_listbox: &classData{
+ name: toUTF16("LISTBOX"),
+ // we don't use LBS_STANDARD because it sorts (and has WS_BORDER; see above)
+ // LBS_NOINTEGRALHEIGHT gives us exactly the size we want
+ // LBS_MULTISEL sounds like it does what we want but it actually doesn't; instead, it toggles item selection regardless of modifier state, which doesn't work like anything else (see http://msdn.microsoft.com/en-us/library/windows/desktop/bb775149%28v=vs.85%29.aspx and http://msdn.microsoft.com/en-us/library/windows/desktop/aa511485.aspx)
+ style: _LBS_NOTIFY | _LBS_NOINTEGRALHEIGHT | _WS_VSCROLL | controlstyle,
+ xstyle: _WS_EX_CLIENTEDGE | controlxstyle,
+ altStyle: _LBS_EXTENDEDSEL | _LBS_NOTIFY | _LBS_NOINTEGRALHEIGHT | _WS_VSCROLL | controlstyle,
+ appendMsg: _LB_ADDSTRING,
+ insertBeforeMsg: _LB_INSERTSTRING,
+ deleteMsg: _LB_DELETESTRING,
+ selectedIndexMsg: _LB_GETCURSEL,
+ selectedIndexErr: negConst(_LB_ERR),
+ addSpaceErr: negConst(_LB_ERRSPACE),
+ lenMsg: _LB_GETCOUNT,
+ },
+ c_progressbar: &classData{
+ name: toUTF16(x_PROGRESS_CLASS),
+ // note that tab stops are disabled for progress bars
+ style: (_PBS_SMOOTH | controlstyle) &^ _WS_TABSTOP,
+ xstyle: 0 | controlxstyle,
+ doNotLoadFont: true,
+ },
+ c_area: &classData{
+ name: areaWndClass,
+ style: areastyle,
+ xstyle: areaxstyle,
+ storeSysData: true,
+ doNotLoadFont: true,
+ },
+}
+
+func (s *sysData) addChild(child *sysData) _HMENU {
+ s.childrenLock.Lock()
+ defer s.childrenLock.Unlock()
+ s.nextChildID++ // start at 1
+ if s.children == nil {
+ s.children = map[_HMENU]*sysData{}
+ }
+ s.children[s.nextChildID] = child
+ return s.nextChildID
+}
+
+func (s *sysData) delChild(id _HMENU) {
+ s.childrenLock.Lock()
+ defer s.childrenLock.Unlock()
+ delete(s.children, id)
+}
+
+var (
+ _blankString = toUTF16("")
+ blankString = utf16ToArg(_blankString)
+)
+
+func (s *sysData) make(window *sysData) (err error) {
+ ct := classTypes[s.ctype]
+ cid := _HMENU(0)
+ pwin := uintptr(_NULL)
+ if window != nil { // this is a child control
+ cid = window.addChild(s)
+ pwin = uintptr(window.hwnd)
+ }
+ style := uintptr(ct.style)
+ if s.alternate {
+ style = uintptr(ct.altStyle)
+ }
+ lpParam := uintptr(_NULL)
+ if ct.storeSysData {
+ lpParam = uintptr(unsafe.Pointer(s))
+ }
+ r1, _, err := _createWindowEx.Call(
+ uintptr(ct.xstyle),
+ utf16ToArg(ct.name),
+ blankString, // we set the window text later
+ style,
+ negConst(_CW_USEDEFAULT),
+ negConst(_CW_USEDEFAULT),
+ negConst(_CW_USEDEFAULT),
+ negConst(_CW_USEDEFAULT),
+ pwin,
+ uintptr(cid),
+ uintptr(hInstance),
+ lpParam)
+ if r1 == 0 { // failure
+ if window != nil {
+ window.delChild(cid)
+ }
+ panic(fmt.Errorf("error actually creating window/control: %v", err))
+ }
+ if !ct.storeSysData { // regular control; store s.hwnd ourselves
+ s.hwnd = _HWND(r1)
+ } else if s.hwnd != _HWND(r1) { // we store sysData in storeSysData(); sanity check
+ panic(fmt.Errorf("hwnd mismatch creating window/control: storeSysData() stored 0x%X but CreateWindowEx() returned 0x%X", s.hwnd, r1))
+ }
+ if !ct.doNotLoadFont {
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_WM_SETFONT),
+ uintptr(_WPARAM(controlFont)),
+ uintptr(_LPARAM(_TRUE)))
+ }
+ return nil
+}
+
+var (
+ _updateWindow = user32.NewProc("UpdateWindow")
+)
+
+// if the object is a window, we need to do the following the first time
+// ShowWindow(hwnd, nCmdShow);
+// UpdateWindow(hwnd);
+func (s *sysData) firstShow() error {
+ _showWindow.Call(
+ uintptr(s.hwnd),
+ uintptr(nCmdShow))
+ r1, _, err := _updateWindow.Call(uintptr(s.hwnd))
+ if r1 == 0 { // failure
+ panic(fmt.Errorf("error updating window for the first time: %v", err))
+ }
+ return nil
+}
+
+func (s *sysData) show() {
+ _showWindow.Call(
+ uintptr(s.hwnd),
+ uintptr(_SW_SHOW))
+}
+
+func (s *sysData) hide() {
+ _showWindow.Call(
+ uintptr(s.hwnd),
+ uintptr(_SW_HIDE))
+}
+
+func (s *sysData) setText(text string) {
+ ptext := toUTF16(text)
+ r1, _, err := _setWindowText.Call(
+ uintptr(s.hwnd),
+ utf16ToArg(ptext))
+ if r1 == 0 { // failure
+ panic(fmt.Errorf("error setting window/control text: %v", err))
+ }
+}
+
+func (s *sysData) setRect(x int, y int, width int, height int, winheight int) error {
+ r1, _, err := _moveWindow.Call(
+ uintptr(s.hwnd),
+ uintptr(x),
+ uintptr(y),
+ uintptr(width),
+ uintptr(height),
+ uintptr(_TRUE))
+ if r1 == 0 { // failure
+ return fmt.Errorf("error setting window/control rect: %v", err)
+ }
+ return nil
+}
+
+func (s *sysData) isChecked() bool {
+ r1, _, _ := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_BM_GETCHECK),
+ uintptr(0),
+ uintptr(0))
+ return r1 == _BST_CHECKED
+}
+
+func (s *sysData) text() (str string) {
+ var tc []uint16
+
+ r1, _, _ := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_WM_GETTEXTLENGTH),
+ uintptr(0),
+ uintptr(0))
+ length := r1 + 1 // terminating null
+ tc = make([]uint16, length)
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_WM_GETTEXT),
+ uintptr(_WPARAM(length)),
+ uintptr(_LPARAM(unsafe.Pointer(&tc[0]))))
+ return syscall.UTF16ToString(tc)
+}
+
+func (s *sysData) append(what string) {
+ pwhat := toUTF16(what)
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(classTypes[s.ctype].appendMsg),
+ uintptr(_WPARAM(0)),
+ utf16ToLPARAM(pwhat))
+ if r1 == uintptr(classTypes[s.ctype].addSpaceErr) {
+ panic(fmt.Errorf("out of space adding item to combobox/listbox (last error: %v)", err))
+ } else if r1 == uintptr(classTypes[s.ctype].selectedIndexErr) {
+ panic(fmt.Errorf("failed to add item to combobox/listbox (last error: %v)", err))
+ }
+}
+
+func (s *sysData) insertBefore(what string, index int) {
+ pwhat := toUTF16(what)
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(classTypes[s.ctype].insertBeforeMsg),
+ uintptr(_WPARAM(index)),
+ utf16ToLPARAM(pwhat))
+ if r1 == uintptr(classTypes[s.ctype].addSpaceErr) {
+ panic(fmt.Errorf("out of space adding item to combobox/listbox (last error: %v)", err))
+ } else if r1 == uintptr(classTypes[s.ctype].selectedIndexErr) {
+ panic(fmt.Errorf("failed to add item to combobox/listbox (last error: %v)", err))
+ }
+}
+
+func (s *sysData) selectedIndex() int {
+ r1, _, _ := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(classTypes[s.ctype].selectedIndexMsg),
+ uintptr(_WPARAM(0)),
+ uintptr(_LPARAM(0)))
+ if r1 == uintptr(classTypes[s.ctype].selectedIndexErr) { // no selection or manually entered text (apparently, for the latter)
+ return -1
+ }
+ return int(r1)
+}
+
+func (s *sysData) selectedIndices() []int {
+ if !s.alternate { // single-selection list box; use single-selection method
+ index := s.selectedIndex()
+ if index == -1 {
+ return nil
+ }
+ return []int{index}
+ }
+
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_LB_GETSELCOUNT),
+ uintptr(0),
+ uintptr(0))
+ if r1 == negConst(_LB_ERR) {
+ panic(fmt.Errorf("error: LB_ERR from LB_GETSELCOUNT in what we know is a multi-selection listbox: %v", err))
+ }
+ if r1 == 0 { // nothing selected
+ return nil
+ }
+ indices := make([]int, r1)
+ r1, _, err = _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_LB_GETSELITEMS),
+ uintptr(_WPARAM(r1)),
+ uintptr(_LPARAM(unsafe.Pointer(&indices[0]))))
+ if r1 == negConst(_LB_ERR) {
+ panic(fmt.Errorf("error: LB_ERR from LB_GETSELITEMS in what we know is a multi-selection listbox: %v", err))
+ }
+ return indices
+}
+
+func (s *sysData) selectedTexts() []string {
+ indices := s.selectedIndices()
+ strings := make([]string, len(indices))
+ for i, v := range indices {
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_LB_GETTEXTLEN),
+ uintptr(_WPARAM(v)),
+ uintptr(0))
+ if r1 == negConst(_LB_ERR) {
+ panic(fmt.Errorf("error: LB_ERR from LB_GETTEXTLEN in what we know is a valid listbox index (came from LB_GETSELITEMS): %v", err))
+ }
+ str := make([]uint16, r1)
+ r1, _, err = _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_LB_GETTEXT),
+ uintptr(_WPARAM(v)),
+ uintptr(_LPARAM(unsafe.Pointer(&str[0]))))
+ if r1 == negConst(_LB_ERR) {
+ panic(fmt.Errorf("error: LB_ERR from LB_GETTEXT in what we know is a valid listbox index (came from LB_GETSELITEMS): %v", err))
+ }
+ strings[i] = syscall.UTF16ToString(str)
+ }
+ return strings
+}
+
+func (s *sysData) setWindowSize(width int, height int) error {
+ var rect _RECT
+
+ r1, _, err := _getClientRect.Call(
+ uintptr(s.hwnd),
+ uintptr(unsafe.Pointer(&rect)))
+ if r1 == 0 {
+ panic(fmt.Errorf("error getting upper-left of window for resize: %v", err))
+ }
+ // TODO AdjustWindowRect() on the result
+ // 0 because (0,0) is top-left so no winheight
+ err = s.setRect(int(rect.left), int(rect.top), width, height, 0)
+ if err != nil {
+ panic(fmt.Errorf("error actually resizing window: %v", err))
+ }
+ return nil
+}
+
+func (s *sysData) delete(index int) {
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(classTypes[s.ctype].deleteMsg),
+ uintptr(_WPARAM(index)),
+ uintptr(0))
+ if r1 == uintptr(classTypes[s.ctype].selectedIndexErr) {
+ panic(fmt.Errorf("failed to delete item from combobox/listbox (last error: %v)", err))
+ }
+}
+
+func (s *sysData) setIndeterminate() {
+ r1, _, err := _setWindowLongPtr.Call(
+ uintptr(s.hwnd),
+ negConst(_GWL_STYLE),
+ uintptr(classTypes[s.ctype].style | _PBS_MARQUEE))
+ if r1 == 0 {
+ panic(fmt.Errorf("error setting progress bar style to enter indeterminate mode: %v", err))
+ }
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_PBM_SETMARQUEE),
+ uintptr(_WPARAM(_TRUE)),
+ uintptr(0))
+ s.isMarquee = true
+}
+
+func (s *sysData) setProgress(percent int) {
+ if percent == -1 {
+ s.setIndeterminate()
+ return
+ }
+ if s.isMarquee {
+ // turn off marquee before switching back
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_PBM_SETMARQUEE),
+ uintptr(_WPARAM(_FALSE)),
+ uintptr(0))
+ r1, _, err := _setWindowLongPtr.Call(
+ uintptr(s.hwnd),
+ negConst(_GWL_STYLE),
+ uintptr(classTypes[s.ctype].style))
+ if r1 == 0 {
+ panic(fmt.Errorf("error setting progress bar style to leave indeterminate mode (percent %d): %v", percent, err))
+ }
+ s.isMarquee = false
+ }
+ send := func(msg uintptr, n int, l _LPARAM) {
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ msg,
+ uintptr(_WPARAM(n)),
+ uintptr(l))
+ }
+ // Windows 7 has a non-disableable slowly-animating progress bar increment
+ // there isn't one for decrement, so we'll work around by going one higher and then lower again
+ // for the case where percent == 100, we need to increase the range temporarily
+ // sources: http://social.msdn.microsoft.com/Forums/en-US/61350dc7-6584-4c4e-91b0-69d642c03dae/progressbar-disable-smooth-animation http://stackoverflow.com/questions/2217688/windows-7-aero-theme-progress-bar-bug http://discuss.joelonsoftware.com/default.asp?dotnet.12.600456.2 http://stackoverflow.com/questions/22469876/progressbar-lag-when-setting-position-with-pbm-setpos http://stackoverflow.com/questions/6128287/tprogressbar-never-fills-up-all-the-way-seems-to-be-updating-too-fast
+ if percent == 100 {
+ send(_PBM_SETRANGE32, 0, 101)
+ }
+ send(_PBM_SETPOS, percent+1, 0)
+ send(_PBM_SETPOS, percent, 0)
+ if percent == 100 {
+ send(_PBM_SETRANGE32, 0, 100)
+ }
+}
+
+func (s *sysData) len() int {
+ r1, _, err := _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(classTypes[s.ctype].lenMsg),
+ uintptr(_WPARAM(0)),
+ uintptr(_LPARAM(0)))
+ if r1 == uintptr(classTypes[s.ctype].selectedIndexErr) {
+ panic(fmt.Errorf("unexpected error return from sysData.len(); GetLastError() says %v", err))
+ }
+ return int(r1)
+}
+
+func (s *sysData) setAreaSize(width int, height int) {
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(msgSetAreaSize),
+ uintptr(width), // WPARAM is UINT_PTR on Windows XP and newer at least, so we're good with this
+ uintptr(height))
+}
+
+func (s *sysData) repaintAll() {
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(msgRepaintAll),
+ uintptr(0),
+ uintptr(0))
+}
+
+func (s *sysData) center() {
+ var ws _RECT
+
+ r1, _, err := _getWindowRect.Call(
+ uintptr(s.hwnd),
+ uintptr(unsafe.Pointer(&ws)))
+ if r1 == 0 {
+ panic(fmt.Errorf("error getting window rect for sysData.center(): %v", err))
+ }
+ // TODO should this be using the monitor functions instead? http://blogs.msdn.com/b/oldnewthing/archive/2005/05/05/414910.aspx
+ // error returns from GetSystemMetrics() is meaningless because the return value, 0, is still valid
+ // TODO should this be using the client rect and not the window rect?
+ dw, _, _ := _getSystemMetrics.Call(uintptr(_SM_CXFULLSCREEN))
+ dh, _, _ := _getSystemMetrics.Call(uintptr(_SM_CYFULLSCREEN))
+ ww := ws.right - ws.left
+ wh := ws.bottom - ws.top
+ wx := (int32(dw) / 2) - (ww / 2)
+ wy := (int32(dh) / 2) - (wh / 2)
+ s.setRect(int(wx), int(wy), int(ww), int(wh), 0)
+}
+
+func (s *sysData) setChecked(checked bool) {
+ c := uintptr(_BST_CHECKED)
+ if !checked {
+ c = uintptr(_BST_UNCHECKED)
+ }
+ _sendMessage.Call(
+ uintptr(s.hwnd),
+ uintptr(_BM_SETCHECK),
+ c,
+ uintptr(0))
+}
generated by cgit v1.2.3 (git 2.51.0) at 2025-11-06 18:53:33 +0000