Initialize

ftxui/examples/component/composition.cpp

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+// 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!