func (tv *TableView) updateSelectedIndexes() {
count := int(tv.SendMessage(win.LVM_GETSELECTEDCOUNT, 0, 0))
indexes := make([]int, count)
j := -1
for i := 0; i < count; i++ {
j = int(tv.SendMessage(win.LVM_GETNEXTITEM, uintptr(j), win.LVNI_SELECTED))
indexes[i] = j
}
changed := len(indexes) != len(tv.selectedIndexes.items)
if !changed {
for i := 0; i < len(indexes); i++ {
if indexes[i] != tv.selectedIndexes.items[i] {
changed = true
break
}
}
}
if changed {
tv.selectedIndexes.items = indexes
if tv.itemStateChangedEventDelay > 0 {
if 0 == win.SetTimer(
tv.hWnd,
tableViewSelectedIndexesChangedTimerId,
uint32(tv.itemStateChangedEventDelay),
0) {
lastError("SetTimer")
}
} else {
tv.selectedIndexesChangedPublisher.Publish()
}
}
}
func (tv *TableView) WndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
switch msg {
case win.WM_ERASEBKGND:
if tv.lastColumnStretched && !tv.inEraseBkgnd {
tv.inEraseBkgnd = true
defer func() {
tv.inEraseBkgnd = false
}()
tv.StretchLastColumn()
}
return 1
case win.WM_GETDLGCODE:
if wParam == win.VK_RETURN {
return win.DLGC_WANTALLKEYS
}
case win.WM_LBUTTONDOWN, win.WM_RBUTTONDOWN, win.WM_LBUTTONDBLCLK, win.WM_RBUTTONDBLCLK:
var hti win.LVHITTESTINFO
hti.Pt = win.POINT{win.GET_X_LPARAM(lParam), win.GET_Y_LPARAM(lParam)}
tv.SendMessage(win.LVM_HITTEST, 0, uintptr(unsafe.Pointer(&hti)))
if hti.Flags == win.LVHT_NOWHERE && tv.SingleItemSelection() {
// We keep the current item, if in single item selection mode.
tv.SetFocus()
return 0
}
switch msg {
case win.WM_LBUTTONDOWN, win.WM_RBUTTONDOWN:
if hti.Flags == win.LVHT_ONITEMSTATEICON &&
tv.itemChecker != nil &&
tv.CheckBoxes() {
tv.toggleItemChecked(int(hti.IItem))
}
}
case win.WM_KEYDOWN:
if wParam == win.VK_SPACE &&
tv.currentIndex > -1 &&
tv.itemChecker != nil &&
tv.CheckBoxes() {
tv.toggleItemChecked(tv.currentIndex)
}
case win.WM_NOTIFY:
switch int32(((*win.NMHDR)(unsafe.Pointer(lParam))).Code) {
case win.LVN_GETDISPINFO:
di := (*win.NMLVDISPINFO)(unsafe.Pointer(lParam))
row := int(di.Item.IItem)
col := tv.fromLVColIdx(di.Item.ISubItem)
if di.Item.Mask&win.LVIF_TEXT > 0 {
var text string
switch val := tv.model.Value(row, col).(type) {
case string:
text = val
case float32:
prec := tv.columns.items[col].precision
if prec == 0 {
prec = 2
}
text = FormatFloatGrouped(float64(val), prec)
case float64:
prec := tv.columns.items[col].precision
if prec == 0 {
prec = 2
}
text = FormatFloatGrouped(val, prec)
case time.Time:
text = val.Format(tv.columns.items[col].format)
case *big.Rat:
prec := tv.columns.items[col].precision
if prec == 0 {
prec = 2
}
text = formatBigRatGrouped(val, prec)
default:
text = fmt.Sprintf(tv.columns.items[col].format, val)
}
utf16 := syscall.StringToUTF16(text)
buf := (*[256]uint16)(unsafe.Pointer(di.Item.PszText))
max := mini(len(utf16), int(di.Item.CchTextMax))
copy((*buf)[:], utf16[:max])
}
if tv.imageProvider != nil && di.Item.Mask&win.LVIF_IMAGE > 0 {
if image := tv.imageProvider.Image(row); image != nil {
if tv.hIml == 0 {
tv.applyImageListForImage(image)
}
di.Item.IImage = imageIndexMaybeAdd(
image,
tv.hIml,
tv.usingSysIml,
tv.imageUintptr2Index,
tv.filePath2IconIndex)
}
}
if di.Item.StateMask&win.LVIS_STATEIMAGEMASK > 0 &&
tv.itemChecker != nil {
checked := tv.itemChecker.Checked(row)
if checked {
di.Item.State = 0x2000
} else {
di.Item.State = 0x1000
}
}
case win.NM_CUSTOMDRAW:
if tv.alternatingRowBGColor != defaultTVRowBGColor {
nmlvcd := (*win.NMLVCUSTOMDRAW)(unsafe.Pointer(lParam))
switch nmlvcd.Nmcd.DwDrawStage {
case win.CDDS_PREPAINT:
return win.CDRF_NOTIFYITEMDRAW
case win.CDDS_ITEMPREPAINT:
if nmlvcd.Nmcd.DwItemSpec%2 == 1 {
nmlvcd.ClrTextBk = win.COLORREF(tv.alternatingRowBGColor)
}
}
}
return win.CDRF_DODEFAULT
case win.LVN_COLUMNCLICK:
nmlv := (*win.NMLISTVIEW)(unsafe.Pointer(lParam))
col := tv.fromLVColIdx(nmlv.ISubItem)
tv.columnClickedPublisher.Publish(col)
if sorter, ok := tv.model.(Sorter); ok && sorter.ColumnSortable(col) {
prevCol := sorter.SortedColumn()
var order SortOrder
if col != prevCol || sorter.SortOrder() == SortDescending {
order = SortAscending
} else {
order = SortDescending
}
sorter.Sort(col, order)
}
case win.LVN_ITEMCHANGED:
nmlv := (*win.NMLISTVIEW)(unsafe.Pointer(lParam))
selectedNow := nmlv.UNewState&win.LVIS_SELECTED > 0
selectedBefore := nmlv.UOldState&win.LVIS_SELECTED > 0
if selectedNow && !selectedBefore {
tv.currentIndex = int(nmlv.IItem)
if tv.itemStateChangedEventDelay > 0 {
if 0 == win.SetTimer(
tv.hWnd,
tableViewCurrentIndexChangedTimerId,
uint32(tv.itemStateChangedEventDelay),
0) {
lastError("SetTimer")
}
} else {
tv.currentIndexChangedPublisher.Publish()
}
}
if !tv.SingleItemSelection() {
tv.updateSelectedIndexes()
}
case win.LVN_ITEMACTIVATE:
tv.itemActivatedPublisher.Publish()
}
case win.WM_TIMER:
switch wParam {
case tableViewCurrentIndexChangedTimerId:
tv.currentIndexChangedPublisher.Publish()
case tableViewSelectedIndexesChangedTimerId:
tv.selectedIndexesChangedPublisher.Publish()
}
}
return tv.WidgetBase.WndProc(hwnd, msg, wParam, lParam)
}