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;
}
}
bool FlexGrid::TryFocus(const Control::Nav &nav)
{
using Nav = Control::Nav;
if (IsFocused()) return true;
if (IsEmpty() || !IsVisible()) return false;
size_t row;
size_t col;
auto dir = nav.AsDigital();
switch (dir) {
case Nav::NEUTRAL:
case Nav::DOWN:
case Nav::RIGHT:
case Nav::NEXT:
row = 0;
col = 0;
break;
case Nav::UP:
row = rows.size() - 1;
col = 0;
break;
case Nav::LEFT:
row = 0;
col = defaultCols.size() - 1;
break;
case Nav::PREV:
row = rows.size() - 1;
col = defaultCols.size() - 1;
break;
default:
throw UnimplementedExn(boost::str(
boost::format("FlexGrid::TryFocus: Unhandled: %s") % nav));
}
auto &cols = rows[row];
if (col < cols.size()) {
auto &cell = cols[col];
if (cell && cell->TryFocus(nav)) {
SetFocusedCell(row, col);
return true;
}
}
// Search for a focusable cell.
switch (dir) {
case Nav::UP:
return FocusUpFrom(row, col, nav);
case Nav::DOWN:
return FocusDownFrom(row, col, nav);
case Nav::LEFT:
return FocusLeftFrom(row, col, nav);
case Nav::RIGHT:
return FocusRightFrom(row, col, nav);
case Nav::PREV:
return FocusPrevFrom(row, col, nav);
case Nav::NEUTRAL:
case Nav::NEXT:
return FocusNextFrom(row, col, nav);
default:
throw UnimplementedExn(boost::str(
boost::format("FlexGrid::TryFocus: Unhandled: %s") % nav));
}
}
