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From CppCoreGuidelines: Rule of Zero: C.20: If you can avoid defining default operations, do. C.52: Use inheriting constructors to import constructors into a derived class that does not need further explicit initialization. DRY forward and using declarations. Miscellaneous: Fix format.sh to output examples with normalised paths in sorted order. Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
#include <memory> // for make_shared
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#include "ftxui/dom/elements.hpp" // for Element, gauge
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#include "ftxui/dom/node.hpp" // for Node
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#include "ftxui/dom/requirement.hpp" // for Requirement
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#include "ftxui/screen/box.hpp" // for Box
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#include "ftxui/screen/screen.hpp" // for Screen
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namespace ftxui {
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#if defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
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// Microsoft's terminals often use fonts not handling the 8 unicode characters
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// for representing the whole gauge. Fallback with less.
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static wchar_t charset[] = L" ▌▌▌███";
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#else
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static wchar_t charset[] = L" ▏▎▍▌▋▊▉█";
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#endif
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class Gauge : public Node {
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public:
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Gauge(float progress) : progress_(progress) {}
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void ComputeRequirement() override {
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requirement_.flex_grow_x = 1;
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requirement_.flex_grow_y = 0;
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requirement_.flex_shrink_x = 1;
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requirement_.flex_shrink_y = 0;
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requirement_.min_x = 1;
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requirement_.min_y = 1;
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}
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void Render(Screen& screen) override {
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float y = box_.y_min;
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float limit = box_.x_min + progress_ * (box_.x_max - box_.x_min + 1);
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int limit_int = limit;
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int x = box_.x_min;
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while (x < limit_int)
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screen.at(x++, y) = charset[9];
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screen.at(x++, y) = charset[int(9 * (limit - limit_int))];
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while (x <= box_.x_max)
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screen.at(x++, y) = charset[0];
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}
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private:
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float progress_;
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};
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/// @brief Draw a high definition progress bar.
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/// @param progress The proportion of the area to be filled. Belong to [0,1].
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/// @ingroup dom
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///
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/// ### Example
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///
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/// A gauge. It can be used to represent a progress bar.
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/// ~~~cpp
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/// border(gauge(0.5))
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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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/// ┌──────────────────────────────────────────────────────────────────────────┐
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/// │█████████████████████████████████████ │
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/// └──────────────────────────────────────────────────────────────────────────┘
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/// ~~~
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Element gauge(float progress) {
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return std::make_shared<Gauge>(progress);
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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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