Add the Renderer component.

examples/component/slider_rgb.cpp

@@ -0,0 +1,83 @@
+#include <functional>  // for function
+#include <memory>      // for allocator, __shared_ptr_access
+#include <string>      // for operator+, to_wstring, char_traits
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"       // for Slider, Make
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/container.hpp"       // for Container
+#include "ftxui/component/event.hpp"  // for Event, Event::Escape, Event::Return
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for separator, operator|, Element, size, text, vbox, xflex, bgcolor, hbox, GREATER_THAN, WIDTH, border, HEIGHT, LESS_THAN
+#include "ftxui/screen/color.hpp"  // for Color
+
+using namespace ftxui;
+
+Element ColorTile(int red, int green, int blue) {
+  return text(L"") | size(WIDTH, GREATER_THAN, 14) |
+         size(HEIGHT, GREATER_THAN, 7) | bgcolor(Color::RGB(red, green, blue));
+}
+
+Element ColorString(int red, int green, int blue) {
+  return text(L"RGB = (" +                     //
+              std::to_wstring(red) + L"," +    //
+              std::to_wstring(green) + L"," +  //
+              std::to_wstring(blue) + L")"     //
+  );
+}
+
+class MyComponent : public ComponentBase {
+ private:
+  int* red_;
+  int* green_;
+  int* blue_;
+  Component slider_red_ = Slider(L"Red  :", red_, 0, 255, 1);
+  Component slider_green_ = Slider(L"Green:", green_, 0, 255, 1);
+  Component slider_blue_ = Slider(L"Blue :", blue_, 0, 255, 1);
+  std::function<void(void)> quit_;
+
+ public:
+  MyComponent(int* red, int* green, int* blue, std::function<void(void)> quit)
+      : red_(red), green_(green), blue_(blue), quit_(quit) {
+    Add(Container::Vertical({
+        slider_red_,
+        slider_green_,
+        slider_blue_,
+    }));
+  }
+
+  Element Render() {
+    return hbox({
+               ColorTile(*red_, *green_, *blue_),
+               separator(),
+               vbox({
+                   slider_red_->Render(),
+                   separator(),
+                   slider_green_->Render(),
+                   separator(),
+                   slider_blue_->Render(),
+                   separator(),
+                   ColorString(*red_, *green_, *blue_),
+               }) | xflex,
+           }) |
+           border | size(WIDTH, LESS_THAN, 80);
+  }
+
+  bool OnEvent(Event event) {
+    if (event == Event::Return || event == Event::Escape)
+      quit_();
+    return ComponentBase::OnEvent(event);
+  }
+};
+
+int main(int argc, const char* argv[]) {
+  auto screen = ScreenInteractive::TerminalOutput();
+  int red = 128;
+  int green = 25;
+  int blue = 100;
+  screen.Loop(Make<MyComponent>(&red, &green, &blue, screen.ExitLoopClosure()));
+}
+
+// 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.