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https://github.com/ArthurSonzogni/FTXUI.git
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123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
#include <functional> // for function
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#include <memory> // for shared_ptr
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#include <utility> // for move
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#include "ftxui/component/captured_mouse.hpp" // for CapturedMouse
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#include "ftxui/component/component.hpp" // for Make, Component, Checkbox
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#include "ftxui/component/component_base.hpp" // for ComponentBase
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#include "ftxui/component/component_options.hpp" // for CheckboxOption
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#include "ftxui/component/event.hpp" // for Event, Event::Return
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#include "ftxui/component/mouse.hpp" // for Mouse, Mouse::Left, Mouse::Pressed
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#include "ftxui/dom/elements.hpp" // for operator|, text, Element, hbox, reflect, focus, nothing, select
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#include "ftxui/screen/box.hpp" // for Box
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#include "ftxui/util/ref.hpp" // for Ref, ConstStringRef
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namespace ftxui {
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namespace {
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class CheckboxBase : public ComponentBase {
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public:
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CheckboxBase(ConstStringRef label, bool* state, Ref<CheckboxOption> option)
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: label_(label), state_(state), option_(std::move(option)) {
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#if defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
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// Microsoft terminal do not use fonts able to render properly the default
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// radiobox glyph.
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if (option_->style_checked == "▣ ")
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option_->style_checked = "[X]";
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if (option_->style_unchecked == "☐ ")
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option_->style_unchecked = "[ ]";
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#endif
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}
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private:
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// Component implementation.
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Element Render() override {
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bool is_focused = Focused();
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bool is_active = Active();
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auto style = is_focused ? (hovered_ ? option_->style_selected_focused
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: option_->style_selected)
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: (hovered_ ? option_->style_focused
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: option_->style_normal);
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auto focus_management = is_focused ? focus : is_active ? select : nothing;
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return hbox(text(*state_ ? option_->style_checked
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: option_->style_unchecked),
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text(*label_) | style | focus_management) |
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reflect(box_);
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}
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bool OnEvent(Event event) override {
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if (event.is_mouse())
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return OnMouseEvent(event);
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hovered_ = false;
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if (event == Event::Character(' ') || event == Event::Return) {
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*state_ = !*state_;
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option_->on_change();
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return true;
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}
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return false;
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}
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bool OnMouseEvent(Event event) {
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hovered_ = box_.Contain(event.mouse().x, event.mouse().y);
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if (!CaptureMouse(event))
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return false;
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if (!hovered_)
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return false;
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if (event.mouse().button == Mouse::Left &&
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event.mouse().motion == Mouse::Pressed) {
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*state_ = !*state_;
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option_->on_change();
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return true;
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}
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return false;
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}
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bool Focusable() const final { return true; }
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ConstStringRef label_;
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bool* const state_;
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bool hovered_ = false;
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Ref<CheckboxOption> option_;
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Box box_;
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};
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} // namespace
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/// @brief Draw checkable element.
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/// @param label The label of the checkbox.
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/// @param checked Whether the checkbox is checked or not.
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/// @param option Additional optional parameters.
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/// @ingroup component
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/// @see CheckboxBase
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///
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/// ### Example
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///
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/// ```cpp
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/// auto screen = ScreenInteractive::FitComponent();
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/// std::string label = "Make a sandwidth";
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/// bool checked = false;
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/// Component checkbox = Checkbox(&label, &checked);
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/// screen.Loop(checkbox)
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/// ```
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///
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/// ### Output
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///
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/// ```bash
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/// ☐ Make a sandwitch
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/// ```
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Component Checkbox(ConstStringRef label,
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bool* checked,
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Ref<CheckboxOption> option) {
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return Make<CheckboxBase>(label, checked, std::move(option));
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}
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} // namespace ftxui
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// 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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