void FlexGrid::OnChildRelinquishedFocus(UiViewModel&, const Control::Nav &nav)
{
using Nav = Control::Nav;
if (!focusedCell) {
RelinquishFocus(nav);
return;
}
auto row = focusedCell->first;
auto col = focusedCell->second;
rows[row][col]->DropFocus();
focusedCell = boost::none;
auto dir = nav.AsDigital();
switch (dir) {
case Nav::NEUTRAL:
RelinquishFocus(nav);
break;
case Nav::UP:
if (!FocusUpFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
case Nav::DOWN:
if (!FocusDownFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
case Nav::LEFT:
if (!FocusLeftFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
case Nav::RIGHT:
if (!FocusRightFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
case Nav::PREV:
if (!FocusPrevFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
case Nav::NEXT:
if (!FocusNextFrom(row, col, nav)) {
RelinquishFocus(nav);
}
break;
default:
throw UnimplementedExn(boost::str(boost::format(
"FlexGrid::OnChildRelinquishedFocus(%s)") % nav));
}
}
bool Slider::OnNavigate(const Control::Nav &nav)
{
using Nav = Control::Nav;
auto dir = nav.AsDigital();
switch (dir) {
case Nav::NEUTRAL:
return true;
case Nav::UP:
case Nav::DOWN:
RelinquishFocus(nav);
return true;
case Nav::LEFT:
SetValue(value - step);
return true;
case Nav::RIGHT:
SetValue(value + step);
return true;
default:
HR_LOG(warning) << "Unhandled navigation direction: " << dir;
return false;
}
}
bool Button::OnNavigate(const Control::Nav &nav)
{
if (nav.AsDigital() != Control::Nav::NEUTRAL) {
RelinquishFocus(nav);
return true;
}
else {
return false;
}
}
void FlexGrid::Clear()
{
if (focusedCell) {
rows[focusedCell->first][focusedCell->second]->DropFocus();
focusedCell = boost::none;
RelinquishFocus(Control::Nav::NEUTRAL);
}
defaultCols.clear();
rows.clear();
SUPER::Clear();
}
void FlexGrid::OnChildRequestedFocus(UiViewModel &child)
{
if (!IsFocused()) {
RequestFocus();
}
if (IsFocused()) {
// Switch focus to the new child, if possible.
if (focusedCell) {
rows[focusedCell->first][focusedCell->second]->DropFocus();
focusedCell = boost::none;
}
if (child.TryFocus()) {
//TODO: Track focus on the cell, and track coords in the cell.
focusedCell = FindChild(&child);
SetFocused(true);
}
else {
// The child that requested focus refused to take the focus.
RelinquishFocus(Control::Nav::NEUTRAL);
}
}
}
