FTXUI  5.0.0
C++ functional terminal UI.
examples/component/with_restored_io.cpp
// Copyright 2022 Arthur Sonzogni. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.
#include <cstdlib> // for system, EXIT_SUCCESS
#include <iostream> // for operator<<, basic_ostream, basic_ostream::operator<<, cout, endl, flush, ostream, basic_ostream<>::__ostream_type, cin
#include <memory> // for shared_ptr, __shared_ptr_access, allocator
#include <string> // for getline, string
#include "ftxui/component/captured_mouse.hpp" // for ftxui
#include "ftxui/component/component.hpp" // for Button, Horizontal, Renderer
#include "ftxui/component/component_base.hpp" // for ComponentBase
#include "ftxui/component/screen_interactive.hpp" // for ScreenInteractive
#include "ftxui/dom/elements.hpp" // for operator|, filler, Element, borderEmpty, hbox, size, paragraph, vbox, LESS_THAN, border, center, HEIGHT, WIDTH
int main() {
using namespace ftxui;
// When pressing this button, "screen.WithRestoredIO" will execute the
// temporarily uninstall the terminal hook and execute the provided callback
// function. This allow running the application in a non-interactive mode.
auto btn_run = Button("Execute with restored IO", screen.WithRestoredIO([] {
std::cout << "This is a child program using stdin/stdout." << std::endl;
for (int i = 0; i < 10; ++i) {
std::cout << "Please enter 10 strings (" << i << "/10)" << std::flush;
std::string input;
std::getline(std::cin, input);
}
}));
auto btn_quit = Button("Quit", screen.ExitLoopClosure());
auto layout = Container::Horizontal({
btn_run,
btn_quit,
});
auto renderer = Renderer(layout, [&] {
auto explanation = paragraph(
"After clicking this button, the ScreenInteractive will be "
"suspended and access to stdin/stdout will temporarilly be "
"restore for running a function.");
auto element = vbox({
explanation | borderEmpty,
hbox({
btn_run->Render(),
filler(),
btn_quit->Render(),
}),
});
element = element | borderEmpty | border | size(WIDTH, LESS_THAN, 80) |
return element;
});
screen.Loop(renderer);
return EXIT_SUCCESS;
}
static ScreenInteractive Fullscreen()
Component Horizontal(Components children)
A list of components, drawn one by one horizontally and navigated horizontally using left/right arrow...
Definition: container.cpp:359
@ HEIGHT
Definition: elements.hpp:147
@ WIDTH
Definition: elements.hpp:147
Decorator size(WidthOrHeight, Constraint, int value)
Apply a constraint on the size of an element.
Definition: size.cpp:89
Component Button(ButtonOption options)
Draw a button. Execute a function when clicked.
Definition: button.cpp:174
Component Renderer(Component child, std::function< Element()>)
Return a new Component, similar to |child|, but using |render| as the Component::Render() event.
Definition: renderer.cpp:61
Element hbox(Elements)
A container displaying elements horizontally one by one.
Definition: hbox.cpp:83
Element center(Element)
Center an element horizontally and vertically.
Elements paragraph(std::wstring text)
Element filler()
An element that will take expand proportionally to the space left in a container.
Definition: flex.cpp:97
@ LESS_THAN
Definition: elements.hpp:148
Element border(Element)
Draw a border around the element.
Definition: border.cpp:228
Element borderEmpty(Element)
Draw an empty border around the element.
Definition: border.cpp:476
Element vbox(Elements)
A container displaying elements vertically one by one.
Definition: vbox.cpp:83