/**
** Center on group.
**
** @param group Group number to center on.
**
** @todo Improve this function, try to show all selected units
** or the most possible units.
*/
static void UiCenterOnGroup(unsigned group, GroupSelectionMode mode = SELECTABLE_BY_RECTANGLE_ONLY)
{
int n = GetNumberUnitsOfGroup(group, SELECT_ALL);
if (n--) {
CUnit **units = GetUnitsOfGroup(group);
PixelPos pos(-1, -1);
// FIXME: what should we do with the removed units? ignore?
if (units[n]->Type && units[n]->Type->CanSelect(mode)) {
pos = units[n]->GetMapPixelPosCenter();
}
while (n--) {
if (units[n]->Type && units[n]->Type->CanSelect(mode)) {
if (pos.x != -1) {
pos += (units[n]->GetMapPixelPosCenter() - pos) / 2;
} else {
pos = units[n]->GetMapPixelPosCenter();
}
}
}
if (pos.x != -1) {
UI.SelectedViewport->Center(pos);
}
}
}
/**
** Add group to current selection.
**
** @param group Group number to add.
*/
static void UiAddGroupToSelection(unsigned group)
{
CUnit **units;
int n;
if (!(n = GetNumberUnitsOfGroup(group, SELECT_ALL))) {
return;
}
//
// Don't allow to mix units and buildings
//
if (NumSelected && Selected[0]->Type->Building) {
return;
}
units = GetUnitsOfGroup(group);
while (n--) {
if (!(units[n]->Removed || units[n]->Type->Building)) {
SelectUnit(*units[n]);
}
}
SelectionChanged();
}
/**
** Change selected units to units from group group_number
** Doesn't change the selection if the group has no unit.
**
** @param group_number number of the group to be selected.
**
** @return number of units in the group.
*/
int SelectGroup(int group_number, GroupSelectionMode mode)
{
int nunits = GetNumberUnitsOfGroup(group_number, SELECT_ALL);
if (nunits) {
if (mode == SELECT_ALL || !IsGroupTainted(group_number)) {
ChangeSelectedUnits(GetUnitsOfGroup(group_number), nunits);
return NumSelected;
} else {
std::vector<CUnit *> table;
CUnit **group = GetUnitsOfGroup(group_number);
for (int i = 0; i < nunits; ++i) {
const CUnitType *type = group[i]->Type;
if (type && type->CanSelect(mode)) {
table.push_back(group[i]);
}
}
if (table.empty() == false) {
ChangeSelectedUnits(&table[0], static_cast<int>(table.size()));
return NumSelected;
}
}
}
return 0;
}
