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Feature: LinearGradient color decorator. (#592)

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Based on the existing color decorators, create new ones to apply a gradient effect on the DOM.

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
This commit is contained in:
Vinicius Moura Longaray
2023-03-22 09:59:02 -03:00
committed by GitHub
parent 2991b0389e
commit e83e90ced2
20 changed files with 671 additions and 106 deletions
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5
include/ftxui/dom/elements.hpp
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@@ -7,6 +7,7 @@
#include "ftxui/dom/canvas.hpp"
#include "ftxui/dom/direction.hpp"
#include "ftxui/dom/flexbox_config.hpp"
#include "ftxui/dom/linear_gradient.hpp"
#include "ftxui/dom/node.hpp"
#include "ftxui/screen/box.hpp"
#include "ftxui/screen/color.hpp"
@@ -99,8 +100,12 @@ Element blink(Element);
Element strikethrough(Element);
Decorator color(Color);
Decorator bgcolor(Color);
Decorator color(const LinearGradient&);
Decorator bgcolor(const LinearGradient&);
Element color(Color, Element);
Element bgcolor(Color, Element);
Element color(const LinearGradient&, Element);
Element bgcolor(const LinearGradient&, Element);
Decorator focusPosition(int x, int y);
Decorator focusPositionRelative(float x, float y);
Element automerge(Element child);

52
include/ftxui/dom/linear_gradient.hpp Normal file
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@@ -0,0 +1,52 @@
#ifndef FTXUI_DOM_LINEAR_GRADIENT_HPP
#define FTXUI_DOM_LINEAR_GRADIENT_HPP
#include <optional>
#include <vector>
#include "ftxui/screen/color.hpp" // for Colors
namespace ftxui {
/// @brief A class representing the settings for linear-gradient color effect.
///
/// Example:
/// ```cpp
/// LinearGradient()
/// .Angle(45)
/// .Stop(Color::Red, 0.0)
/// .Stop(Color::Green, 0.5)
/// .Stop(Color::Blue, 1.0);
/// ```
///
/// There are also shorthand constructors:
/// ```cpp
/// LinearGradient(Color::Red, Color::Blue);
/// LinearGradient(45, Color::Red, Color::Blue);
/// ```
struct LinearGradient {
float angle = 0.f;
struct Stop {
Color color = Color::Default;
std::optional<float> position;
};
std::vector<Stop> stops;
// Simple constructor
LinearGradient();
LinearGradient(Color begin, Color end);
LinearGradient(float angle, Color begin, Color end);
// Modifier using the builder pattern.
LinearGradient& Angle(float angle);
LinearGradient& Stop(Color color, float position);
LinearGradient& Stop(Color color);
};
} // namespace ftxui
#endif // FTXUI_DOM_LINEAR_GRADIENT_HPP
// Copyright 2023 Arthur Sonzogni. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.