mirror of
https://github.com/ArthurSonzogni/FTXUI.git
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99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
#include <memory> // for make_shared
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#include <utility> // for move
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#include "ftxui/dom/elements.hpp" // for Decorator, Element, focusPosition, focusPositionRelative
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#include "ftxui/dom/node_decorator.hpp" // for NodeDecorator
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#include "ftxui/dom/requirement.hpp" // for Requirement, Requirement::NORMAL, Requirement::Selection
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#include "ftxui/screen/box.hpp" // for Box
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namespace ftxui {
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/// @brief Used inside a `frame`, this force the view to be scrolled toward a
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/// a given position. The position is expressed in proportion of the requested
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/// size.
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///
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/// For instance:
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/// - (0, 0) means that the view is scrolled toward the upper left.
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/// - (1, 0) means that the view is scrolled toward the upper right.
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/// - (0, 1) means that the view is scrolled toward the bottom left.
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = huge_document()
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/// | focusPositionRelative(0.f, 1.f)
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/// | frame;
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/// ```
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Decorator focusPositionRelative(float x, float y) {
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class Impl : public NodeDecorator {
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public:
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Impl(Element child, float x, float y)
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: NodeDecorator(std::move(child)), x_(x), y_(y) {}
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void ComputeRequirement() override {
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NodeDecorator::ComputeRequirement();
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requirement_.selection = Requirement::Selection::NORMAL;
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Box& box = requirement_.selected_box;
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box.x_min = (int)((float)requirement_.min_x * x_);
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box.y_min = (int)((float)requirement_.min_y * y_);
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box.x_max = (int)((float)requirement_.min_x * x_);
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box.y_max = (int)((float)requirement_.min_y * y_);
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}
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private:
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const float x_;
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const float y_;
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};
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return [x, y](Element child) {
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return std::make_shared<Impl>(std::move(child), x, y);
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};
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}
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/// @brief Used inside a `frame`, this force the view to be scrolled toward a
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/// a given position. The position is expressed in the numbers of cells.
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///
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/// @ingroup dom
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///
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/// ### Example
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///
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/// ```cpp
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/// Element document = huge_document()
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/// | focusPosition(10, 10)
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/// | frame;
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/// ```
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Decorator focusPosition(int x, int y) {
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class Impl : public NodeDecorator {
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public:
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Impl(Element child, int x, int y)
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: NodeDecorator(std::move(child)), x_(x), y_(y) {}
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void ComputeRequirement() override {
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NodeDecorator::ComputeRequirement();
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requirement_.selection = Requirement::Selection::NORMAL;
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Box& box = requirement_.selected_box;
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box.x_min = x_;
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box.y_min = y_;
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box.x_max = x_;
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box.y_max = y_;
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}
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private:
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const int x_;
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const int y_;
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};
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return [x, y](Element child) {
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return std::make_shared<Impl>(std::move(child), x, y);
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};
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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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