examples/component/composition.cpp

custom_loop

// Copyright 2020 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 <stdlib.h>                   // for EXIT_SUCCESS
#include <chrono>                     // for milliseconds
#include <ftxui/component/event.hpp>  // for Event
#include <ftxui/component/mouse.hpp>  // for ftxui
#include <ftxui/dom/elements.hpp>  // for text, separator, Element, operator|, vbox, border
#include <memory>                  // for allocator, shared_ptr
#include <string>                  // for operator+, to_string
#include <thread>                  // for sleep_for
 
#include "ftxui/component/component.hpp"  // for CatchEvent, Renderer, operator|=
#include "ftxui/component/loop.hpp"       // for Loop
#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 
int main() {
  using namespace ftxui;
  auto screen = ScreenInteractive::FitComponent();
 
  // Create a component counting the number of frames drawn and event handled.
  int custom_loop_count = 0;
  int frame_count = 0;
  int event_count = 0;
  auto component = Renderer([&] {
    frame_count++;
    return vbox({
               text("This demonstrates using a custom ftxui::Loop. It "),
               text("runs at 100 iterations per seconds. The FTXUI events "),
               text("are all processed once per iteration and a new frame "),
               text("is rendered as needed"),
               separator(),
               text("ftxui event count: " + std::to_string(event_count)),
               text("ftxui frame count: " + std::to_string(frame_count)),
               text("Custom loop count: " + std::to_string(custom_loop_count)),
           }) |
           border;
  });
 
  component |= CatchEvent([&](Event) -> bool {
    event_count++;
    return false;
  });
 
  Loop loop(&screen, component);
 
  while (!loop.HasQuitted()) {
    custom_loop_count++;
    loop.RunOnce();
    std::this_thread::sleep_for(std::chrono::milliseconds(10));
  }
 
  return EXIT_SUCCESS;
}

// Copyright 2021 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 <memory>  // for allocator, shared_ptr, __shared_ptr_access
#include <string>  // for operator+, to_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 text, separator, Element, operator|, vbox, border
 
using namespace ftxui;
 
// An example of how to compose multiple components into one and maintain their
// interactiveness.
int main() {
  auto left_count = 0;
  auto right_count = 0;
 
  auto left_buttons = Container::Horizontal({
      Button("Decrease", [&] { left_count--; }),
      Button("Increase", [&] { left_count++; }),
  });
 
  auto right_buttons = Container::Horizontal({
      Button("Decrease", [&] { right_count--; }),
      Button("Increase", [&] { right_count++; }),
  });
 
  // Renderer decorates its child with a new rendering function. The way the
  // children reacts to events is maintained.
  auto leftpane = Renderer(left_buttons, [&] {
    return vbox({
               text("This is the left control"),
               separator(),
               text("Left button count: " + std::to_string(left_count)),
               left_buttons->Render(),
           }) |
           border;
  });
 
  auto rightpane = Renderer(right_buttons, [&] {
    return vbox({
               text("This is the right control"),
               separator(),
               text("Right button count: " + std::to_string(right_count)),
               right_buttons->Render(),
           }) |
           border;
  });
 
  // Container groups components togethers. To render a Container::Horizontal,
  // it render its children side by side. It maintains their interactiveness and
  // provide the logic to navigate from one to the other using the arrow keys.
  auto composition = Container::Horizontal({leftpane, rightpane});
 
  auto screen = ScreenInteractive::FitComponent();
  screen.Loop(composition);
  return 0;
}
 
// Thanks to Chris Morgan for this example!