mirror of
https://github.com/ArthurSonzogni/FTXUI.git
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58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
// Copyright 2020 Arthur Sonzogni. All rights reserved.
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// Use of this source code is governed by the MIT license that can be found in
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// the LICENSE file.
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#include "ftxui/component/radiobox.hpp"
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#include <algorithm>
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#include <functional>
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namespace ftxui {
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Element RadioBox::Render() {
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std::vector<Element> elements;
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bool is_focused = Focused();
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for (size_t i = 0; i < entries.size(); ++i) {
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auto style =
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(focused == int(i) && is_focused) ? focused_style : unfocused_style;
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auto focus_management =
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(focused != int(i)) ? nothing : is_focused ? focus : select;
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const std::wstring& symbol = selected == int(i) ? checked : unchecked;
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elements.push_back(hbox(text(symbol), text(entries[i]) | style) |
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focus_management);
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}
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return vbox(std::move(elements));
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}
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bool RadioBox::OnEvent(Event event) {
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if (!Focused())
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return false;
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int new_focused = focused;
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if (event == Event::ArrowUp || event == Event::Character('k'))
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new_focused--;
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if (event == Event::ArrowDown || event == Event::Character('j'))
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new_focused++;
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if (event == Event::Tab && entries.size())
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new_focused = (new_focused + 1) % entries.size();
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if (event == Event::TabReverse && entries.size())
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new_focused = (new_focused + entries.size() - 1) % entries.size();
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new_focused = std::max(0, std::min(int(entries.size()) - 1, new_focused));
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if (focused != new_focused) {
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focused = new_focused;
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return true;
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}
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if (event == Event::Character(' ') || event == Event::Return) {
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selected = focused;
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on_change();
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}
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return false;
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}
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} // namespace ftxui
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