Method RowGrabFocus

tensor/tensorcore/table.go:556–580

RowGrabFocus grabs the focus for the first focusable widget in given row -- returns that element or nil if not successful -- note: grid must have already rendered for focus to be grabbed!

(row int)

// returns that element or nil if not successful -- note: grid must have
// already rendered for focus to be grabbed!
func (tb *Table) RowGrabFocus(row int) *core.WidgetBase {
	if !tb.IsRowInBounds(row) || tb.InFocusGrab { // range check
		return nil
	}
	nWidgPerRow, idxOff := tb.RowWidgetNs()
	ridx := nWidgPerRow * row
	lg := tb.ListGrid
	// first check if we already have focus
	for fli := 0; fli < tb.NCols; fli++ {
		w := lg.Child(ridx + idxOff + fli).(core.Widget).AsWidget()
		if w.StateIs(states.Focused) || w.ContainsFocus() {
			return w
		}
	}
	tb.InFocusGrab = true
	defer func() { tb.InFocusGrab = false }()
	for fli := 0; fli < tb.NCols; fli++ {
		w := lg.Child(ridx + idxOff + fli).(core.Widget).AsWidget()
		if w.CanFocus() {
			w.SetFocusEvent()
			return w
		}
	}
	return nil
}

//////////////////////////////////////////////////////
// 	Header layout