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@ -44,6 +44,20 @@ class BuildObjectWindow : public PickerWindowBase {
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this->vscroll->ScrollTowards(pos);
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}
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/**
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* Tests whether the previously selected object can be selected.
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* @return \c true if the selected object is available, \c false otherwise.
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*/
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bool CanRestoreSelectedObject()
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{
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if (_selected_object_index == -1) return false;
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ObjectClass *sel_objclass = ObjectClass::Get(_selected_object_class);
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if ((int)sel_objclass->GetSpecCount() <= _selected_object_index) return false;
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return sel_objclass->GetSpec(_selected_object_index)->IsAvailable();
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}
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public:
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BuildObjectWindow(const WindowDesc *desc, Window *w) : PickerWindowBase(w), info_height(1)
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{
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@ -56,7 +70,11 @@ public:
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this->FinishInitNested(desc, 0);
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this->SelectFirstAvailableObject(true);
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if (this->CanRestoreSelectedObject()) {
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this->SelectOtherObject(_selected_object_index);
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} else {
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this->SelectFirstAvailableObject(true);
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}
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assert(ObjectClass::Get(_selected_object_class)->GetUISpecCount() > 0); // object GUI should be disables elsewise
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this->EnsureSelectedObjectClassIsVisible();
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this->GetWidget<NWidgetMatrix>(WID_BO_OBJECT_MATRIX)->SetCount(4);
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