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Handle empty container.

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This commit is contained in:
ArthurSonzogni 2019-02-02 18:41:07 +01:00
parent 620f70c3e5
commit a366c9b9e2
1 changed files with 10 additions and 1 deletions
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11
src/ftxui/component/container.cpp
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@ -38,6 +38,8 @@ bool Container::OnEvent(Event event) {
} }
Component* Container::ActiveChild() { Component* Container::ActiveChild() {
if (children_.size() == 0)
return nullptr;
return children_[*selector_ % children_.size()]; return children_[*selector_ % children_.size()];
} }
@ -91,6 +93,8 @@ Element Container::VerticalRender() {
Elements elements; Elements elements;
for(auto& it : children_) for(auto& it : children_)
elements.push_back(it->Render()); elements.push_back(it->Render());
if (elements.size() == 0)
return text(L"Empty container");
return vbox(std::move(elements)); return vbox(std::move(elements));
} }
@ -98,11 +102,16 @@ Element Container::HorizontalRender() {
Elements elements; Elements elements;
for(auto& it : children_) for(auto& it : children_)
elements.push_back(it->Render()); elements.push_back(it->Render());
if (elements.size() == 0)
return text(L"Empty container");
return hbox(std::move(elements)); return hbox(std::move(elements));
} }
Element Container::TabRender() { Element Container::TabRender() {
return ActiveChild()->Render(); Component* active_child = ActiveChild();
if (active_child)
return active_child->Render();
return text(L"Empty container");
} }
} // namespace ftxui } // namespace ftxui