FTXUI 6.1.9 C++ functional terminal UI.

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clear_under.cpp
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1// Copyright 2020 Arthur Sonzogni. All rights reserved.
2// Use of this source code is governed by the MIT license that can be found in
3// the LICENSE file.
4#include <memory> // for make_shared
5#include <utility> // for move
6
7#include "ftxui/dom/elements.hpp" // for Element, clear_under
8#include "ftxui/dom/node.hpp" // for Node
9#include "ftxui/dom/node_decorator.hpp" // for NodeDecorator
10#include "ftxui/screen/box.hpp" // for Box
11#include "ftxui/screen/screen.hpp" // for Pixel, Screen
12
13 namespace ftxui {
14
15 namespace {
16 using ftxui::Screen;
17
18 class ClearUnder : public NodeDecorator {
19 public:
20 using NodeDecorator::NodeDecorator;
21
22 void Render(Screen& screen) override {
23 for (int y = box_.y_min; y <= box_.y_max; ++y) {
24 for (int x = box_.x_min; x <= box_.x_max; ++x) {
25 screen.PixelAt(x, y) = Pixel();
26 screen.PixelAt(x, y).character = " "; // Consider the pixel written.
27 }
28 }
29 Node::Render(screen);
30 }
31};
32} // namespace
33
34/// @brief Before drawing |child|, clear the pixels below. This is useful in
35/// combination with dbox.
36/// @see ftxui::dbox
37/// @ingroup dom
38 Element clear_under(Element element) {
39 return std::make_shared<ClearUnder>(std::move(element));
40}
41
42} // namespace ftxui
box.hpp
ftxui::NodeDecorator::NodeDecorator
NodeDecorator(Element child)
Definition node_decorator.hpp:18
elements.hpp
ftxui::Node::Render
friend void Render(Screen &screen, Node *node, Selection &selection)
Definition node.cpp:96
ftxui::clear_under
Element clear_under(Element element)
Before drawing |child|, clear the pixels below. This is useful in combination with dbox.
Definition clear_under.cpp:38
ftxui::Render
void Render(Screen &screen, const Element &element)
Display an element on a ftxui::Screen.
Definition node.cpp:84
ftxui::Screen
A rectangular grid of Pixel.
Definition screen.hpp:27
ftxui
The FTXUI ftxui:: namespace.
Definition animation.hpp:10
ftxui::Element
std::shared_ptr< Node > Element
Definition elements.hpp:22
node.hpp
node_decorator.hpp
screen.hpp