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Component decorators (#354)

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Add decorator variants for decorator components

Add the "pipe" operator for components, similar to what was done for Elements.
We are able to put something like:
```
Button(...) | Maybe(&show_button)
```

Add decorators for:
- `Maybe`
- `CatchEvent`
- `Renderer`

Signed-off-by: Kefu Chai <tchaikov@gmail.com>
Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
This commit is contained in:
Kefu Chai
2022-03-12 22:18:36 +08:00
committed by GitHub
parent 3e28fd6520
commit 95c766e9e4
14 changed files with 210 additions and 32 deletions
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29
examples/component/maybe.cpp
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@@ -1,17 +1,15 @@
#include <memory> // for shared_ptr, __shared_ptr_access
#include <string> // for string, basic_string, allocator
#include <memory> // for allocator, shared_ptr
#include <string> // for string, basic_string
#include <vector> // for vector
#include "ftxui/component/captured_mouse.hpp" // for ftxui
#include "ftxui/component/component.hpp" // for Checkbox, Maybe, Radiobox, Renderer, Vertical
#include "ftxui/component/component_base.hpp" // for ComponentBase
#include "ftxui/component/screen_interactive.hpp" // for Component, ScreenInteractive
#include "ftxui/dom/elements.hpp" // for Element, operator|, border
#include "ftxui/component/component.hpp" // for operator|, Maybe, Checkbox, Radiobox, Renderer, Vertical
#include "ftxui/component/component_base.hpp" // for Component
#include "ftxui/component/screen_interactive.hpp" // for ScreenInteractive
#include "ftxui/dom/elements.hpp" // for border, color, operator|, text, Element
#include "ftxui/screen/color.hpp" // for Color, Color::Red
using namespace ftxui;
Component Border(Component child) {
return Renderer(child, [child] { return child->Render() | border; });
}
int main(int argc, const char* argv[]) {
std::vector<std::string> entries = {
@@ -21,20 +19,19 @@ int main(int argc, const char* argv[]) {
};
int menu_1_selected = 0;
int menu_2_selected = 0;
auto menu_1 = Radiobox(&entries, &menu_1_selected);
auto menu_2 = Radiobox(&entries, &menu_2_selected);
menu_1 = Border(menu_1);
menu_2 = Border(menu_2);
bool menu_1_show = false;
bool menu_2_show = false;
auto layout = Container::Vertical({
Checkbox("Show menu_1", &menu_1_show),
Maybe(menu_1, &menu_1_show),
Radiobox(&entries, &menu_1_selected) | border | Maybe(&menu_1_show),
Checkbox("Show menu_2", &menu_2_show),
Maybe(menu_2, &menu_2_show),
Radiobox(&entries, &menu_2_selected) | border | Maybe(&menu_2_show),
Renderer([] {
return text("You found the secret combinaison!") | color(Color::Red);
}) | Maybe([&] { return menu_1_selected == 1 && menu_2_selected == 2; }),
});
auto screen = ScreenInteractive::TerminalOutput();