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Improved Introductory Tutorial Page (#433)

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This PR solves #434 by improving on the existing introductory tutorial through adjustment of the grammar and vocabulary of the sentences, rewriting of sentences, writing new descriptions for sub-headings, and adding new link references for the corresponding discussion elements.

I have not replaced the inline script ascii calls yet, and there might be a few other things that might require some adjustment. However, this version looks much cleaner, consistent, and descriptive that the previous iteration.

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
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Hunter Zolomon 2022-07-09 23:53:36 +08:00 committed by GitHub
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21
doc/doxygen_extra.css
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@ -178,11 +178,12 @@ div.headertitle {
}
div.fragment {
padding: 16px;
background-color: #f3f3f3;
border: 0 solid;
transition: all 0.5s ease-in-out;
border-radius:5px;
border: 0 solid;
border: none;
padding:16px;
transition: all 0.5s ease-in-out;
}
div.fragment:hover {
@ -192,8 +193,9 @@ div.fragment:hover {
div.line {
font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
font-size: 85%;
line-height: 1.45;
font-size: 90%;
font-variant-numeric: tabular-nums lining-nums;
font-kerning: none;
-webkit-transition-duration: 0;
-moz-transition-duration: 0;
-ms-transition-duration: 0;
@ -206,15 +208,6 @@ div.line.glow {
box-shadow: none;
}
pre.fragment {
border: 0 solid #C4CFE5;
padding: 16px;
background-color: #f3f3f3;
font-size: 85%;
line-height: 1.45;
font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}
/* @group Code Colorization */
span.keyword {
color: #808000

354
doc/mainpage.md
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@ -4,8 +4,8 @@
Welcome to the FTXUI documentation!
This is a brief tutorial. You are also encouraged to learn, by reading the
[examples](./examples.html)
This is a brief tutorial. You are also encouraged to self-learn by reading the
[examples](./examples.html).
@tableofcontents
@ -45,17 +45,19 @@ int main(void) {
**output**
```bash
┌────┐┌─────────────────────────────────────────────────────────────────┐┌─────┐
│left││middle ││right│
└────┘└─────────────────────────────────────────────────────────────────┘└─────┘
┌────┐┌────────────────────────────────────┐┌─────┐
│left││middle ││right│
└────┘└────────────────────────────────────┘└─────┘
```
# Build {#build}
## Using CMake {#build-cmake}
This is an example configuration for your **CMakeLists.txt**
CMakeLists.txt
~~~cmake
```cmake
cmake_minimum_required (VERSION 3.11)
# --- Fetch FTXUI --------------------------------------------------------------
@ -89,38 +91,43 @@ target_link_libraries(ftxui-starter
PRIVATE ftxui::component # Not needed for this example.
)
~~~
```
Build
~~~sh
Subsequently, you build the project in the standard fashion as follows:
```bash
mkdir build && cd build
cmake ..
make
./main
~~~
```
# List of modules. {#modules}
The project is made from into 3 modules:
The project is comprised of 3 modules:
1. **ftxui/screen** defines a `ftxui::Screen`, this is a grid of `ftxui::Pixel`.
1. **ftxui/screen** defines a `ftxui::Screen`, a grid of `ftxui::Pixel`.
2. **ftxui/dom** is the main module. It defines a hierarchical set of
`ftxui::Element`. An element draws something on the `ftxui::Screen`. It is
responsive to the size of its container.
3. **ftxui/component** The part is only needed if you need to respond to the
User input. It defines a set of `ftxui::Component`. The use can navigates
3. **ftxui/component** The module is required if your program needs to respond
to user input. It defines a set of `ftxui::Component`. These components can
be utilized to navigate the program by using the arrow keys and interacting
with widgets such as the checkbox. You can also make you own components.
The use can navigates
using the arrow keys and interact with widgets like checkbox/inputbox/... You
can make you own components.
# screen {#module-screen}
It defines a `ftxui::Screen`. This is a grid of `ftxui::Pixel`. A Pixel
represent a Unicode character and its associated style (bold, colors, etc...).
The screen can be printed as a string using `ftxui::Screen::ToString()`.
This is the visual element of the program. It defines a `ftxui::Screen`, which
is a grid of `ftxui::Pixel`. A Pixel represents a Unicode character and its
associated style (bold, colors, etc.). The screen can be printed as a string
using `ftxui::Screen::ToString()`. The following example highlights this
process:
~~~cpp
```cpp
#include <ftxui/screen/screen.hpp>
#include <iostream>
@ -136,12 +143,14 @@ The screen can be printed as a string using `ftxui::Screen::ToString()`.
std::cout << screen.ToString();
return EXIT_SUCCESS;
}
~~~
```
# dom {#module-dom}
This module defines a hierarchical set of `ftxui::Element`. An element manages
layout and can be responsive to the terminal dimensions.
the layout and can be responsive to the terminal dimension changes. Note the
following example where this module is used to create a simple layout with a
number of operators:
**Example:**
```cpp
@ -165,7 +174,8 @@ document |= border
**List of elements**
They are all defined inside:
The list of all elements are included and can be accessed by including the
corresponding header file:
```cpp
#include <ftxui/dom/elements.hpp>
```
@ -175,41 +185,44 @@ They are all defined inside:
## text ## {#dom-text}
The most simple widget. It displays a text.
~~~cpp
```cpp
text("I am a piece of text");
~~~
~~~bash
```
```bash
I am a piece of text.
~~~
```
## vtext {#dom-vtext}
Same as `ftxui::text`, but vertical.
~~~cpp
Identical to `ftxui::text`, but displayed vertically.
Code:
```cpp
vtext("HELLO");
~~~
~~~bash
```
Terminal output:
```bash
H
E
L
L
O
~~~
```
## paragraph {#dom-paragraph}
Similar to `ftxui::text`, but the individual word are wrapped along multiple
lines, depending on the width of its container.
Sample Code:
```cpp
paragraph("A very long text")
```
Similar to `ftxui::text`, but this support line wrapping and alignments. The
words are split by spaces
[Paragraph example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html)
![ezgif com-gif-maker (4)](https://user-images.githubusercontent.com/4759106/147251370-983a06e7-6f41-4113-92b8-942f43d34d06.gif)
See:
For a more detailed example refer to [detailed example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html). Paragraph also includes a number of other variants as shown below:
```cpp
Element paragraph(std::string text);
Element paragraphAlignLeft(std::string text);
@ -221,25 +234,28 @@ Element paragraphAlignJustify(std::string text);
## border {#dom-border}
Add a border around an element
~~~cpp
border(text("The element"))
~~~
Adds a border around an element.
~~~bash
Code:
```cpp
border(text("The element"))
```
Terminal output:
```bash
┌───────────┐
│The element│
└───────────┘
~~~
```
Same, with the pipe operator:
You can achieve the same behavior by using the pipe operator.
Code:
```cpp
text("The element") | border
```
Border come with different styles.
See:
Border also comes in a variety of styles as shown below:
```cpp
Element border(Element);
Element borderLight(Element);
@ -254,24 +270,27 @@ Decorator borderWith(Pixel);
## window ## {#dom-window}
A `ftxui::window` is a `ftxui::border`, but with some text on top of the border.
Add a border around an element
~~~cpp
A `ftxui::window` is a `ftxui::border`, but with an additional header. To add a
window around an element, wrap it and specify a string as the header.
Code:
```cpp
window("The window", text("The element"))
~~~
```
~~~bash
Terminal output:
```bash
┌The window─┐
│The element│
└───────────┘
~~~
```
## separator {#dom-separator}
Display a vertical or horizontal line to visually split the content of a
Displays a vertical/horizontal line to visually split the content of a
container in two.
~~~cpp
Code:
```cpp
border(
hbox({
text("Left"),
@ -279,17 +298,17 @@ border(
text("Right")
})
)
~~~
```
~~~bash
Terminal output:
```bash
┌────┬─────┐
│left│right│
└────┴─────┘
~~~
```
Separators come with different styles:
See:
Separators come in a variety of flavors as shown below:
```cpp
Element separator(void);
Element separatorLight();
@ -311,18 +330,21 @@ Element separatorVSelector(float up,
## gauge {#dom-gauge}
A gauge. It can be used to represent a progress bar.
~~~cpp
border(gauge(0.5))
~~~
It constitutes a gauge. It can be used to represent a progress bar.
~~~bash
Code:
```cpp
border(gauge(0.5))
```
Teminal output:
```bash
┌────────────────────────────────────────────────────────────────────────────┐
│██████████████████████████████████████ │
└────────────────────────────────────────────────────────────────────────────┘
~~~
```
A gauge can be displayed into several directions. See:
Gauges can be displayed in many orientations as shown below:
```cpp
Element gauge(float ratio);
Element gaugeLeft(float ratio);
@ -344,21 +366,21 @@ Element graph(GraphFunction);
```
## Colors {#dom-colors}
A terminal console can usually display colored text and colored background.
~~~cpp
Most terminal consoles can display colored text and colored backgrounds. FTXUI
supports every color palette:
```cpp
Decorator color(Color);
Decorator bgcolor(Color);
~~~
```
FTXUI support every color palette:
Color [gallery](https://arthursonzogni.github.io/FTXUI/examples_2dom_2color_gallery_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147248595-04c7245a-5b85-4544-809d-a5984fc6f9e7.png)
### Palette16 #{#dom-colors-palette-16}
On most terminal the following colors are supported:
On most terminals the following colors are supported:
- Default
- Black
@ -385,7 +407,7 @@ On most terminal the following colors are supported:
- Yellow
- YellowLight
Example:
Example use of the above colors using the pipe operator:
```cpp
text("Blue foreground") | color(Color::Blue);
text("Blue background") | bgcolor(Color::Blue);
@ -405,7 +427,11 @@ text("HotPink") | color(Color::HotPink);
### TrueColor #{#dom-colors-true-color}
On terminal supporting trueColor, you can directly chose the 24bit RGB color:
On terminal supporting trueColor, you can directly use the 24bit RGB color
space:
Use the constructors below to specify the **RGB** or **HSV** values for your
color:
There are two constructors:
```cpp
@ -419,11 +445,10 @@ ftxui::Color::HSV(uint8_t hue, uint8_t saturation, uint8_t value);
@endhtmlonly
## Style {#dom-style}
A terminal console can usually display colored text and colored background.
The text can also have different effects: bold, dim, underlined, inverted,
blink.
In addition to colored text and colored backgrounds. Many terminals support text
effects such as: `bold`, `dim`, `underlined`, `inverted`, `blink`.
~~~cpp
```cpp
Element bold(Element);
Element dim(Element);
Element inverted(Element);
@ -431,85 +456,94 @@ Element underlined(Element);
Element blink(Element);
Decorator color(Color);
Decorator bgcolor(Color);
~~~
```
[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2style_gallery_8cpp-example.html)
![image](https://user-images.githubusercontent.com/4759106/147244118-380bf834-9e33-40df-9ff0-07c10f2598ef.png)
Example:
~~~cpp
To use these effects, simply wrap your elements with your desired effect:
```cpp
underlined(bold(text("This text is bold and underlined")))
~~~
```
Tips: The pipe operator can be used to chain Decorator:
~~~cpp
Alternatively, use the pipe operator to chain it on your element:
```cpp
text("This text is bold")) | bold | underlined
~~~
```
## Layout {#dom-layout}
Element can be arranged together:
- horizontally with `ftxui::hbox`
- vertically with `ftxui::vbox`
- inside a grid with `ftxui::gridbox`
- wrap along one direction using the `ftxui::flexbox`.
Enables elements to be arranged in the following ways:
- **Horizontally** with `ftxui::hbox`
- **Vertically** with `ftxui::vbox`
- **Inside a grid** with `ftxui::gridbox`
- **Wrapped along one direction** using the `ftxui::flexbox`.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2vbox_hbox_8cpp-example.html) using `ftxui::hbox`, `ftxui::vbox` and `ftxui::filler`.
![image](https://user-images.githubusercontent.com/4759106/147242524-7103b5d9-1a92-4e2d-ac70-b3d6740061e3.png)
[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2gridbox_8cpp-example.htmlp) using `ftxui::gridbox`:
[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2gridbox_8cpp-example.htmlp)
using `ftxui::gridbox`:
![image](https://user-images.githubusercontent.com/4759106/147242972-0db1f2e9-0790-496f-86e6-ed2c604f7a73.png)
[Example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/hflow.cpp) using flexbox:
[Example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/hflow.cpp)
using flexbox:
![image](https://user-images.githubusercontent.com/4759106/147243064-780ac7cc-605b-475f-94b8-cf7c4aed03a5.png)
[See](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html) also this [demo](https://arthursonzogni.com/FTXUI/examples/?file=component/flexbox).
Checkout this
[example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html)
and the associated
[demo](https://arthursonzogni.com/FTXUI/examples/?file=component/flexbox).
Element can become flexible using the the `ftxui::flex` decorator.
Element can also become flexible using the the `ftxui::flex` decorator.
**Examples**
~~~cpp
Code:
```cpp
hbox({
text("left") | border ,
text("middle") | border | flex,
text("right") | border,
});
~~~
~~~bash
┌────┐┌─────────────────────────────────────────────────────────────────┐┌─────┐
│left││middle ││right│
└────┘└─────────────────────────────────────────────────────────────────┘└─────┘
~~~
```
Terminal output:
```bash
┌────┐┌─────────────────────────────────────────────────────┐┌─────┐
│left││middle ││right│
└────┘└─────────────────────────────────────────────────────┘└─────┘
```
~~~cpp
Code:
```cpp
hbox({
text("left") | border ,
text("middle") | border | flex,
text("right") | border | flex,
});
~~~
~~~bash
┌────┐┌───────────────────────────────────┐┌───────────────────────────────────┐
│left││middle ││right │
└────┘└───────────────────────────────────┘└───────────────────────────────────┘
~~~
```
Terminal output:
```bash
┌────┐┌───────────────────────────────┐┌───────────────────────────────┐
│left││middle ││right │
└────┘└───────────────────────────────┘└───────────────────────────────┘
```
## Table {#dom-table}
A class to easily style a table of data.
Enables easy formatting of data into a neat table like visual form.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
[Code example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147250766-77d8ec9e-cf2b-486d-9866-1fd9f1bd2e6b.png)
## Canvas {#dom-canvas}
See [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
See the API [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
```cpp
auto c = Canvas(100, 100);
@ -517,33 +551,33 @@ See [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
auto element = canvas(c);
```
Drawing can be made on a `ftxui::Canvas`, using braille, block, or simple
Drawing can be performed on a `ftxui::Canvas`, using braille, block, or simple
characters:
Simple [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/canvas.cpp):
![image](https://user-images.githubusercontent.com/4759106/147245843-76cc62fb-ccb4-421b-aacf-939f9afb42fe.png)
Complex [examples](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/component/canvas_animated.cpp):
Complex [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/component/canvas_animated.cpp):
![ezgif com-gif-maker (3)](https://user-images.githubusercontent.com/4759106/147250538-783a8246-98e0-4a25-b032-3bd3710549d1.gif)
# component {#module-component}
The `ftxui::component`module defines the logic to produce interactive component
responding to user's events (keyboard, mouse, etc...)
The `ftxui::component` module defines the logic that produces interactive
components that respond to user events (keyboard, mouse, etc.).
A `ftxui::ScreenInteractive` defines a main loop to render a component.
A `ftxui::ScreenInteractive` defines a main loop that renders a component.
A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The later
defines
A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The latter defines:
- `ftxui::ComponentBase::Render()`: How to render the interface.
- `ftxui::ComponentBase::OnEvent()`: How to react to events.
- `ftxui::ComponentBase::Add()`: Give a parent/child relation ship in between
two component. This defines a tree a components, which help properly define
how keyboard navigation works.
- `ftxui::ComponentBase::Add()`: Construct a parent/child relationship
between two components. The tree of component is used to define how to
navigate using the keyboard.
`ftxui::Element` are used to render a single frame.
`ftxui::Element` are used to render a single frame. On the other side
`ftxui::Component` are used to render dynamic user interface, producing multiple
frame, and updating its state on events.
@ -551,7 +585,8 @@ frame, and updating its state on events.
![image](https://user-images.githubusercontent.com/4759106/147247330-b60beb9f-e665-48b4-81c0-4b01ee95bc66.png)
Predefined components are available in ["ftxui/dom/component.hpp"](./component_8hpp.html)
All predefined components are available in
["ftxui/dom/component.hpp"](./component_8hpp.html)
\include ftxui/component/component.hpp
@ -569,6 +604,8 @@ Produced by: `ftxui::Input()` from "ftxui/component/component.hpp"
## Menu {#component-menu}
Defines a menu object. It contains a list of entries, one of them is selected.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2menu_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147247822-0035fd6f-bb13-4b3a-b057-77eb9291582f.png)
@ -582,6 +619,8 @@ Produced by: `ftxui::Menu()` from "ftxui/component/component.hpp"
## Toggle {#component-toggle}
A special kind of menu. The entries are displayed horizontally.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2toggle_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147249383-e2201cf1-b7b8-4a5a-916f-d761e3e7ae40.png)
@ -594,6 +633,9 @@ Produced by: `ftxui::Toggle()` from "ftxui/component/component.hpp"
## CheckBox {#component-checkbox}
This component defines a checkbox. It is a single entry that can be turned
on/off.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2checkbox_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147246646-b86926a9-1ef9-4efb-af98-48a9b62acd81.png)
@ -606,6 +648,8 @@ Produced by: `ftxui::Checkbox()` from "ftxui/component/component.hpp"
## RadioBox {#component-radiobox}
A radiobutton component. This is a list of entries, where one can be turned on.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2radiobox_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147246401-809d14a5-6621-4e36-8dd9-a2d75ef2a94e.png)
@ -618,6 +662,9 @@ Produced by: `ftxui::Radiobox()` from "ftxui/component/component.hpp"
## Dropdown {#component-dropdown}
A drop down menu is a component that when checked display a list of element for
the user to select one.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2dropdown_8cpp-example.html):
![youtube-video-gif (3)](https://user-images.githubusercontent.com/4759106/147246982-1e821751-531c-4e1f-bc37-2fa290e143cd.gif)
@ -626,6 +673,9 @@ Produced by: `ftxui::Dropdown()` from "ftxui/component/component.hpp"
## Slider {#component-slider}
Represents a slider object that consists of a range with binned intermediate
intervals. It can be created by `ftxui::Slider()`.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2slider_8cpp-example.html):
![image](https://user-images.githubusercontent.com/4759106/147249265-7e2cad75-082c-436e-affe-44a550c480ab.png)
@ -634,7 +684,7 @@ Produced by: `ftxui::Slider()` from "ftxui/component/component.hpp"
## Renderer {#component-renderer}
Produced by: `ftxui::Renderer()` from \ref 'ftxui/component/component.hpp'. This
Produced by: `ftxui::Renderer()` from \ref ftxui/component/component.hpp. This
component decorate another one by using a different function to render an
interface.
@ -647,11 +697,11 @@ auto renderer = Renderer(inner, [&] {
});
```
`ftxui::Renderer` also support the component decorator pattern:
`ftxui::Renderer` also supports the component decorator pattern:
```cpp
auto component = [...]
component = component
| Renderer([] (Element e) { return e | border))
| Renderer([](Element e) { return e | border))
| Renderer(bold)
```
@ -663,9 +713,8 @@ component = component | border | bold;
## CatchEvent {#component-catchevent}
Produced by: `ftxui::CatchEvent()` from \ref 'ftxui/component/component.hpp'.
This component decorate another one and catch the events before the underlying
component.
Produced by: `ftxui::CatchEvent()` from \ref ftxui/component/component.hpp.
This component decorate others, catching events before the underlying component.
Examples:
```cpp
@ -694,9 +743,9 @@ component = component
## Collapsible {#component-collapsible}
Useful for section whose visibility can be toggle on/off by the user.
This is basically, a combinaison of a `ftxui::Checkbox` and a `ftxui::Maybe`
components.
Useful for visual elements whose visibility can be toggle on/off by the user.
Essentially, this the combination of the `ftxui::Checkbox()` and
`ftxui::Maybe()` components.
```cpp
auto collabsible = Collapsible("Show more", inner_element);
@ -704,9 +753,9 @@ auto collabsible = Collapsible("Show more", inner_element);
## Maybe {#component-maybe}
Produced by: `ftxui::Maybe()` from \ref `ftxui/component/component.hpp`.
This component decorate another one, by showing/hiding it depending on a boolean
or a predicate.
Produced by: `ftxui::Maybe()` from \ref ftxui/component/component.hpp.
This component can be utilized to show/hide any other component via a boolean or
a predicate.
Example with a boolean:
```cpp
@ -721,9 +770,8 @@ auto component = Renderer([]{ return "Hello World!"; });
auto maybe_component = Maybe(component, [&] { return time > 10; })
```
`ftxui::Maybe` can be used as a decorator.
```
As usual, `ftxui::Maybe` can also be used as a decorator:
```cpp
component = component
| Maybe(&a_boolean)
| Maybe([&] { return time > 10; })
@ -759,22 +807,20 @@ one of them. This is useful for implementing a tab bar.
![ezgif com-gif-maker (2)](https://user-images.githubusercontent.com/4759106/147250217-fe447e0f-7a99-4e08-948a-995087d9b40e.gif)
## ResizableSplit::{Left, Right, Top, Bottom} {#component-resizable-split}
## ResizableSplit {#component-resizable-split}
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2resizable_split_8cpp-example.html):
![ezgif com-gif-maker](https://user-images.githubusercontent.com/4759106/147248372-c55512fe-9b96-4b08-a1df-d05cf2cae431.gif)
Produced by:
It defines a horizontal or vertical separation between two children components.
The position of the split is variable and controllable using the mouse.
There are four possible splits:
- `ftxui::ResizableSplitLeft()`
- `ftxui::ResizableSplitRight()`
- `ftxui::ResizableSplitTop()`
- `ftxui::ResizableSplitBottom()`
from "ftxui/component/component.hpp"
It defines an horizontal or vertical separation in between two children
component. The position of the split is variable and controllable using the
mouse.
[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2resizable_split_8cpp-example.html):
![ezgif com-gif-maker](https://user-images.githubusercontent.com/4759106/147248372-c55512fe-9b96-4b08-a1df-d05cf2cae431.gif)
@htmlonly
<script id="asciicast-tprMH2EdkUoMb7D2YxgMGgpzx" src="https://asciinema.org/a/tprMH2EdkUoMb7D2YxgMGgpzx.js" async></script>
@ -782,16 +828,14 @@ mouse.
## Force a frame redraw. {#component-force-redraw}
Whenever a new group of events have been processed: keyboard, mouse, window
resize, etc..., the `ftxui::ScreenInteractive::Loop()` is responsible for
drawing a new frame.
You might want to react to arbitrary events that are unknown to FTXUI. This can
be achieve by posting events via `ftxui::ScreenInteractive::PostEvent`, via a
thread. You can post the event`ftxui::Event::Custom`.
Typically, `ftxui::ScreenInteractive::Loop()` is responsible for drawing a new
frame whenever a new group of events (e.g keyboard, mouse, window resize, etc.)
has been processed. However, you might want to react to arbitrary events that
are unknown to FTXUI. To accomplish this, you must post events using
`ftxui::ScreenInteractive::PostEvent` (**this is thread safe**) via a thread.
You will have to post the event `ftxui::Event::Custom`.
Example:
```cpp
screen->PostEvent(Event::Custom);
```
`ftxui::ScreenInteractive::PostEvent` is thread safe.