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examples/component/canvas_animated.cpp
// Copyright 2021 Arthur Sonzogni. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSED file.
#include <cmath> // for sin, cos
#include <ftxui/dom/elements.hpp> // for canvas, Element, separator, hbox, operator|, border
#include <ftxui/screen/screen.hpp> // for Pixel
#include <memory> // for allocator, shared_ptr, __shared_ptr_access
#include <string> // for string, basic_string
#include <utility> // for move
#include <vector> // for vector, __alloc_traits<>::value_type
#include "ftxui/component/component.hpp" // for Renderer, CatchEvent, Horizontal, Menu, Tab
#include "ftxui/component/component_base.hpp" // for ComponentBase
#include "ftxui/component/event.hpp" // for Event
#include "ftxui/component/mouse.hpp" // for Mouse
#include "ftxui/component/screen_interactive.hpp" // for ScreenInteractive
#include "ftxui/dom/canvas.hpp" // for Canvas
#include "ftxui/screen/color.hpp" // for Color, Color::Red, Color::Blue, Color::Green, ftxui
int main() {
using namespace ftxui;
int mouse_x = 0;
int mouse_y = 0;
// A triangle following the mouse, using braille characters.
auto renderer_line_braille = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "Several lines (braille)");
c.DrawPointLine(mouse_x, mouse_y, 80, 10, Color::Red);
c.DrawPointLine(80, 10, 80, 40, Color::Blue);
c.DrawPointLine(80, 40, mouse_x, mouse_y, Color::Green);
return canvas(std::move(c));
});
// A triangle following the mouse, using block characters.
auto renderer_line_block = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "Several lines (block)");
c.DrawBlockLine(mouse_x, mouse_y, 80, 10, Color::Red);
c.DrawBlockLine(80, 10, 80, 40, Color::Blue);
c.DrawBlockLine(80, 40, mouse_x, mouse_y, Color::Green);
return canvas(std::move(c));
});
// A circle following the mouse, using braille characters.
auto renderer_circle_braille = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A circle (braille)");
c.DrawPointCircle(mouse_x, mouse_y, 30);
return canvas(std::move(c));
});
// A circle following the mouse, using block characters.
auto renderer_circle_block = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A circle (block)");
c.DrawBlockCircle(mouse_x, mouse_y, 30);
return canvas(std::move(c));
});
// A filled circle following the mouse, using braille characters.
auto renderer_circle_filled_braille = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A circle filled (braille)");
c.DrawPointCircleFilled(mouse_x, mouse_y, 30);
return canvas(std::move(c));
});
// A filled circle following the mouse, using block characters.
auto renderer_circle_filled_block = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A circle filled (block)");
c.DrawBlockCircleFilled(mouse_x, mouse_y, 30);
return canvas(std::move(c));
});
// An ellipse following the mouse, using braille characters.
auto renderer_ellipse_braille = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "An ellipse (braille)");
c.DrawPointEllipse(mouse_x / 2, mouse_y / 2, mouse_x / 2, mouse_y / 2);
return canvas(std::move(c));
});
// An ellipse following the mouse, using block characters.
auto renderer_ellipse_block = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "An ellipse (block)");
c.DrawBlockEllipse(mouse_x / 2, mouse_y / 2, mouse_x / 2, mouse_y / 2);
return canvas(std::move(c));
});
// An ellipse following the mouse filled, using braille characters.
auto renderer_ellipse_filled_braille = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A filled ellipse (braille)");
c.DrawPointEllipseFilled(mouse_x / 2, mouse_y / 2, mouse_x / 2,
mouse_y / 2);
return canvas(std::move(c));
});
// An ellipse following the mouse filled, using block characters.
auto renderer_ellipse_filled_block = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A filled ellipse (block)");
c.DrawBlockEllipseFilled(mouse_x / 2, mouse_y / 2, mouse_x / 2,
mouse_y / 2);
c.DrawBlockEllipse(mouse_x / 2, mouse_y / 2, mouse_x / 2, mouse_y / 2);
return canvas(std::move(c));
});
// A text following the mouse
auto renderer_text = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A piece of text");
c.DrawText(mouse_x, mouse_y, "This is a piece of text with effects",
[](Pixel& p) {
p.foreground_color = Color::Red;
p.underlined = true;
p.bold = true;
});
return canvas(std::move(c));
});
auto renderer_plot_1 = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A graph");
std::vector<int> ys(100);
for (int x = 0; x < 100; x++) {
float dx = float(x - mouse_x);
float dy = 50.f;
ys[x] = int(dy + 20 * cos(dx * 0.14) + 10 * sin(dx * 0.42));
}
for (int x = 1; x < 99; x++)
c.DrawPointLine(x, ys[x], x + 1, ys[x + 1]);
return canvas(std::move(c));
});
auto renderer_plot_2 = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A symmetrical graph filled");
std::vector<int> ys(100);
for (int x = 0; x < 100; x++) {
ys[x] = int(30 + //
10 * cos(x * 0.2 - mouse_x * 0.05) + //
5 * sin(x * 0.4) + //
5 * sin(x * 0.3 - mouse_y * 0.05)); //
}
for (int x = 0; x < 100; x++) {
c.DrawPointLine(x, 50 + ys[x], x, 50 - ys[x], Color::Red);
}
return canvas(std::move(c));
});
auto renderer_plot_3 = Renderer([&] {
auto c = Canvas(100, 100);
c.DrawText(0, 0, "A 2D gaussian plot");
int size = 15;
// mouse_x = 5mx + 3*my
// mouse_y = 0mx + -5my + 90
float my = (mouse_y - 90) / -5.f;
float mx = (mouse_x - 3 * my) / 5.f;
std::vector<std::vector<float>> ys(size, std::vector<float>(size));
for (int y = 0; y < size; y++) {
for (int x = 0; x < size; x++) {
float dx = x - mx;
float dy = y - my;
ys[y][x] = -1.5 + 3.0 * std::exp(-0.2f * (dx * dx + dy * dy));
}
}
for (int y = 0; y < size; y++) {
for (int x = 0; x < size; x++) {
if (x != 0) {
c.DrawPointLine(
5 * (x - 1) + 3 * (y - 0), 90 - 5 * (y - 0) - 5 * ys[y][x - 1],
5 * (x - 0) + 3 * (y - 0), 90 - 5 * (y - 0) - 5 * ys[y][x]);
}
if (y != 0) {
c.DrawPointLine(
5 * (x - 0) + 3 * (y - 1), 90 - 5 * (y - 1) - 5 * ys[y - 1][x],
5 * (x - 0) + 3 * (y - 0), 90 - 5 * (y - 0) - 5 * ys[y][x]);
}
}
}
return canvas(std::move(c));
});
int selected_tab = 12;
auto tab = Container::Tab(
{
renderer_line_braille,
renderer_line_block,
renderer_circle_braille,
renderer_circle_block,
renderer_circle_filled_braille,
renderer_circle_filled_block,
renderer_ellipse_braille,
renderer_ellipse_block,
renderer_ellipse_filled_braille,
renderer_ellipse_filled_block,
renderer_plot_1,
renderer_plot_2,
renderer_plot_3,
renderer_text,
},
&selected_tab);
// This capture the last mouse position.
auto tab_with_mouse = CatchEvent(tab, [&](Event e) {
if (e.is_mouse()) {
mouse_x = (e.mouse().x - 1) * 2;
mouse_y = (e.mouse().y - 1) * 4;
}
return false;
});
std::vector<std::string> tab_titles = {
"line (braille)",
"line (block)",
"circle (braille)",
"circle (block)",
"circle filled (braille)",
"circle filled (block)",
"ellipse (braille)",
"ellipse (block)",
"ellipse filled (braille)",
"ellipse filled (block)",
"plot_1 simple",
"plot_2 filled",
"plot_3 3D",
"text",
};
auto tab_toggle = Menu(&tab_titles, &selected_tab);
auto component = Container::Horizontal({
tab_with_mouse,
tab_toggle,
});
// Add some separator to decorate the whole component:
auto component_renderer = Renderer(component, [&] {
return hbox({
tab_with_mouse->Render(),
separator(),
tab_toggle->Render(),
}) |
border;
});
auto screen = ScreenInteractive::FitComponent();
screen.Loop(component_renderer);
return 0;
}
canvas.hpp
ftxui::Color::Green
@ Green
Definition color.hpp:54
ftxui::Color::Red
@ Red
Definition color.hpp:53
ftxui::Color::Blue
@ Blue
Definition color.hpp:56
ftxui::ScreenInteractive::FitComponent
static ScreenInteractive FitComponent()
Definition screen_interactive.cpp:416
color.hpp
component.hpp
component_base.hpp
elements.hpp
event.hpp
mouse.hpp
ftxui::Container::Horizontal
Component Horizontal(Components children)
A list of components, drawn one by one horizontally and navigated horizontally using left/right arrow...
Definition container.cpp:360
ftxui::Container::Tab
Component Tab(Components children, int *selector)
A list of components, where only one is drawn and interacted with at a time. The |selector| gives the...
Definition container.cpp:405
ftxui
Definition animation.hpp:10
ftxui::size
Decorator size(WidthOrHeight, Constraint, int value)
Apply a constraint on the size of an element.
Definition size.cpp:89
ftxui::Menu
Component Menu(MenuOption options)
A list of text. The focused element is selected.
Definition menu.cpp:512
ftxui::Renderer
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
ftxui::hbox
Element hbox(Elements)
A container displaying elements horizontally one by one.
Definition hbox.cpp:94
ftxui::canvas
Element canvas(ConstRef< Canvas >)
Produce an element from a Canvas, or a reference to a Canvas.
Definition canvas.cpp:891
ftxui::separator
Element separator()
Draw a vertical or horizontal separation in between two other elements.
Definition separator.cpp:134
ftxui::border
Element border(Element)
Draw a border around the element.
Definition border.cpp:227
ftxui::CatchEvent
Component CatchEvent(Component child, std::function< bool(Event)>)
screen.hpp
screen_interactive.hpp
ftxui::Canvas
Definition canvas.hpp:23
ftxui::Event
Represent an event. It can be key press event, a terminal resize, or more ...
Definition event.hpp:27
ftxui::Event::is_mouse
bool is_mouse() const
Definition event.hpp:107
ftxui::Event::mouse
struct Mouse & mouse()
Definition event.hpp:108
ftxui::Pixel
A Unicode character and its associated style.
Definition pixel.hpp:15
ftxui::Pixel::foreground_color
Color foreground_color
Definition pixel.hpp:49
ftxui::Pixel::bold
bool bold
Definition pixel.hpp:29
ftxui::Pixel::underlined
bool underlined
Definition pixel.hpp:33