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https://github.com/ArthurSonzogni/FTXUI.git
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a09ebcc442
This fix the bug from: https://github.com/ArthurSonzogni/FTXUI/pull/11 About: ~~~ Bug: Focus handling not working in the examples (e.g. checkbox.cpp) I can toggle the individual checkboxes but I cannot move between items, I tried to understand the focus implementation but am I unsure which keypresses would move focus between different components ~~~
110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
#include "ftxui/component/container.hpp"
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#include <algorithm>
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namespace ftxui {
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// static
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Container Container::Horizontal() {
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Container container;
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container.event_handler_ = &Container::HorizontalEvent;
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container.render_handler_ = &Container::HorizontalRender;
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return container;
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}
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// static
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Container Container::Vertical() {
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Container container;
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container.event_handler_ = &Container::VerticalEvent;
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container.render_handler_ = &Container::VerticalRender;
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return container;
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}
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// static
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Container Container::Tab(int* selector) {
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Container container;
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container.event_handler_ = &Container::TabEvent;
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container.render_handler_ = &Container::TabRender;
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container.selector_ = selector;
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return container;
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}
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bool Container::OnEvent(Event event) {
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if (!Focused())
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return false;
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if (ActiveChild()->OnEvent(event))
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return true;
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return (this->*event_handler_)(event);
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}
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Component* Container::ActiveChild() {
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if (children_.size() == 0)
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return nullptr;
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int selected = selector_ ? *selector_ : selected_;
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return children_[selected % children_.size()];
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}
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bool Container::VerticalEvent(Event event) {
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int old_selected = selected_;
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if (event == Event::ArrowUp || event == Event::Character('k'))
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selected_--;
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if (event == Event::ArrowDown || event == Event::Character('j'))
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selected_++;
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if (event == Event::Tab && children_.size())
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selected_ = (selected_ + 1) % children_.size();
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if (event == Event::TabReverse && children_.size())
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selected_ = (selected_ + children_.size() - 1) % children_.size();
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selected_ = std::max(0, std::min(int(children_.size()) - 1, selected_));
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return old_selected != selected_;
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}
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bool Container::HorizontalEvent(Event event) {
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int old_selected = selected_;
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if (event == Event::ArrowLeft || event == Event::Character('h'))
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selected_--;
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if (event == Event::ArrowRight || event == Event::Character('l'))
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selected_++;
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if (event == Event::Tab && children_.size())
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selected_ = (selected_ + 1) % children_.size();
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if (event == Event::TabReverse && children_.size())
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selected_ = (selected_ + children_.size() - 1) % children_.size();
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selected_ = std::max(0, std::min(int(children_.size()) - 1, selected_));
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return old_selected != selected_;
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}
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Element Container::Render() {
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return (this->*render_handler_)();
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}
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Element Container::VerticalRender() {
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Elements elements;
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for (auto& it : children_)
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elements.push_back(it->Render());
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if (elements.size() == 0)
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return text(L"Empty container");
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return vbox(std::move(elements));
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}
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Element Container::HorizontalRender() {
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Elements elements;
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for (auto& it : children_)
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elements.push_back(it->Render());
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if (elements.size() == 0)
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return text(L"Empty container");
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return hbox(std::move(elements));
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}
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Element Container::TabRender() {
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Component* active_child = ActiveChild();
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if (active_child)
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return active_child->Render();
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return text(L"Empty container");
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}
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} // namespace ftxui
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