Method setSortIcon

tableview.go:1069–1115

*func (tv *TableView) selectedColumnIndex() int { return tv.fromLVColIdx(tv.SendMessage(LVM_GETSELECTEDCOLUMN, 0, 0)) }*/ func (tv *TableView) setSelectedColumnIndex(index int) { tv.SendMessage(win.LVM_SETSELECTEDCOLUMN, uintptr(tv.toLVColIdx(index)), 0) }

(index int, order SortOrder)

// }

func (tv *TableView) setSortIcon(index int, order SortOrder) error {
	idx := int(tv.toLVColIdx(index))

	frozenCount := tv.visibleFrozenColumnCount()

	for i, col := range tv.visibleColumns() {
		item := win.HDITEM{
			Mask: win.HDI_FORMAT,
		}

		var headerHwnd win.HWND
		var offset int
		if col.frozen {
			headerHwnd = tv.hwndFrozenHdr
		} else {
			headerHwnd = tv.hwndNormalHdr
			offset = -frozenCount
		}

		iPtr := uintptr(offset + i)
		itemPtr := uintptr(unsafe.Pointer(&item))

		if win.SendMessage(headerHwnd, win.HDM_GETITEM, iPtr, itemPtr) == 0 {
			return newError("SendMessage(HDM_GETITEM)")
		}

		if i == idx {
			switch order {
			case SortAscending:
				item.Fmt &^= win.HDF_SORTDOWN
				item.Fmt |= win.HDF_SORTUP

			case SortDescending:
				item.Fmt &^= win.HDF_SORTUP
				item.Fmt |= win.HDF_SORTDOWN
			}
		} else {
			item.Fmt &^= win.HDF_SORTDOWN | win.HDF_SORTUP
		}

		if win.SendMessage(headerHwnd, win.HDM_SETITEM, iPtr, itemPtr) == 0 {
			return newError("SendMessage(HDM_SETITEM)")
		}
	}

	return nil
}

// ColumnClicked returns the event that is published after a column header was
// clicked.