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seminar11 slider

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nihonium 2 years ago
parent 514012f0cb
commit f1e450cc9e
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6
seminar11_events/02_slider/Makefile
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build:
g++ ./slider.cpp -std=c++11 -o slider -lsfml-graphics -lsfml-window -lsfml-system
build_debug:
g++ ./slider.cpp -std=c++11 -o slider -lsfml-graphics -lsfml-window -lsfml-system -D_DEBUG
build_circle:
g++ ./circle.cpp -std=c++11 -o circle -lsfml-graphics -lsfml-window -lsfml-system

57
seminar11_events/02_slider/circle.cpp
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#include <iostream>
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include "slider.hpp"
int main()
{
int result;
unsigned char r, g, b;
sf::RenderWindow window(sf::VideoMode(800, 600), "Slider");
window.setFramerateLimit(60);
sf::Font font;
if (!font.loadFromFile("consolas.ttf")) {
std::cout << "Can't load button font" << std::endl;
}
Slider slider(window, font, sf::Vector2f{200, 100}, 10, 250);
Slider slider_r(window, font, sf::Vector2f{800, 200}, 0, 255);
Slider slider_g(window, font, sf::Vector2f{800, 300}, 0, 255);
Slider slider_b(window, font, sf::Vector2f{800, 400}, 0, 255);
sf::CircleShape circle(10);
circle.setPosition(sf::Vector2f{400, 400});
while (window.isOpen()) {
sf::Event event;
while (window.pollEvent(event)) {
if (event.type == sf::Event::Closed) {
window.close();
}
result = slider.handleEvent(event);
/* Centering of the circle */
circle.setPosition(circle.getPosition() + sf::Vector2f{circle.getRadius() - result, circle.getRadius() - result});
circle.setRadius(result);
r = slider_r.handleEvent(event);
g = slider_g.handleEvent(event);
b = slider_b.handleEvent(event);
circle.setFillColor(sf::Color{r, g, b});
}
window.clear(sf::Color::Black);
slider.draw();
slider_r.draw();
slider_g.draw();
slider_b.draw();
window.draw(circle);
window.display();
}
return 0;
}

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seminar11_events/02_slider/consolas.ttf
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36
seminar11_events/02_slider/slider.cpp
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#include <iostream>
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include "slider.hpp"
int main()
{
int result;
sf::RenderWindow window(sf::VideoMode(800, 600), "Slider");
window.setFramerateLimit(60);
sf::Font font;
if (!font.loadFromFile("consolas.ttf")) {
std::cout << "Can't load button font" << std::endl;
}
Slider slider(window, font);
while (window.isOpen()) {
sf::Event event;
while (window.pollEvent(event)) {
if (event.type == sf::Event::Closed) {
window.close();
}
result = slider.handleEvent(event);
std::cout << result << std::endl;
}
window.clear(sf::Color::Black);
slider.draw();
window.display();
}
return 0;
}

119
seminar11_events/02_slider/slider.hpp
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#pragma once
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <sstream>
class Slider
{
private:
inline static const sf::Color defaultColor {sf::Color(190, 210, 190)};
inline static const sf::Color pressedColor {sf::Color(150, 170, 150)};
inline static const sf::Color textColor {sf::Color::Black};
inline static const int kCharacterSize = 14;
int mMinValue;
int mMaxValue;
float mSliderPosition = 0;
sf::RenderWindow& mRenderWindow;
sf::RectangleShape mSlider;
sf::RectangleShape mAxis;
sf::Text mText;
/* Is slider pressed at the moment */
bool mIsPressed = false;
int onMousePressed(const sf::Event& event)
{
if (event.mouseButton.button == sf::Mouse::Left) {
sf::Vector2f mousePosition = mRenderWindow.mapPixelToCoords({event.mouseButton.x, event.mouseButton.y});
if (mSlider.getGlobalBounds().contains(mousePosition))
mIsPressed = true;
else if (mAxis.getGlobalBounds().contains(mousePosition))
{
mIsPressed = true;
if (mousePosition.x + mSlider.getSize().x <= mAxis.getPosition().x + mAxis.getSize().x) {
mSlider.setPosition({mousePosition.x, mSlider.getPosition().y});
mSliderPosition = (mSlider.getPosition().x - mAxis.getPosition().x) / (mAxis.getSize().x - mSlider.getSize().x);
}
else {
mSlider.setPosition({mAxis.getPosition().x + mAxis.getSize().x - mSlider.getSize().x, mSlider.getPosition().y});
mSliderPosition = 1;
}
}
}
return mMinValue + (mMaxValue - mMinValue) * mSliderPosition;
}
int onMouseMove(const sf::Event& event)
{
if (!mIsPressed) {
return mMinValue + (mMaxValue - mMinValue) * mSliderPosition;
}
sf::Vector2f mousePosition = mRenderWindow.mapPixelToCoords({event.mouseMove.x, event.mouseMove.y});
if ((mousePosition.x >= mAxis.getPosition().x) && (mousePosition.x + mSlider.getSize().x <= mAxis.getPosition().x + mAxis.getSize().x)) {
mSlider.setPosition({mousePosition.x, mSlider.getPosition().y});
}
else if (mousePosition.x < mAxis.getPosition().x) {
mSlider.setPosition({mAxis.getPosition().x, mSlider.getPosition().y});
}
else if (mousePosition.x + mSlider.getSize().x > mAxis.getPosition().x + mAxis.getSize().x) {
mSlider.setPosition({mAxis.getPosition().x + mAxis.getSize().x - mSlider.getSize().x, mSlider.getPosition().y});
}
mSliderPosition = (mSlider.getPosition().x - mAxis.getPosition().x) / (mAxis.getSize().x - mSlider.getSize().x);
return mMinValue + (mMaxValue - mMinValue) * mSliderPosition;
}
public:
Slider(sf::RenderWindow& window, const sf::Font& font, sf::Vector2f position = {100,200},int min = 0, int max = 100) : mRenderWindow(window)
{
mSlider.setFillColor(sf::Color::Red);
mSlider.setSize({10,30});
mSlider.setPosition(position - sf::Vector2f{0, 10});
mSlider.setOutlineColor(sf::Color::Black);
mSlider.setOutlineThickness(2);
mAxis.setFillColor(defaultColor);
mAxis.setSize({500,10});
mAxis.setPosition(position);
std::stringstream ss;
ss << mMinValue;
mText.setString(ss.str());
mText.setFont(font);
mText.setCharacterSize(kCharacterSize);
mText.setFillColor(sf::Color::White);
mText.setPosition(position + sf::Vector2f{mAxis.getSize().x + 10, -4});
mMinValue = min;
mMaxValue = max;
mIsPressed = false;
}
void draw()
{
std::stringstream ss;
ss << mMinValue + (mMaxValue - mMinValue) * mSliderPosition;
mText.setString(ss.str());
mRenderWindow.draw(mAxis);
mRenderWindow.draw(mSlider);
mRenderWindow.draw(mText);
}
int handleEvent(const sf::Event& event) {
if (event.type == sf::Event::MouseMoved) {
return onMouseMove(event);
}
else if (event.type == sf::Event::MouseButtonPressed) {
return onMousePressed(event);
}
else if (event.type == sf::Event::MouseButtonReleased) {
mIsPressed = false;
}
return mMinValue + (mMaxValue - mMinValue) * mSliderPosition;
}
};