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slider.cpp
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slider.cpp
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#include <iostream>
#include "slider.h"
#include "params.h"
Slider::Slider(float minValue, float maxValue, float defaultValue, sf::Vector2f position, float width, std::vector<Boid>& boids) :
minValue(minValue), maxValue(maxValue), value(defaultValue), dragging(false), boids(boids) {
slider.setPosition(position);
slider.setSize(sf::Vector2f(width, 10));
slider.setFillColor(sf::Color::White);
knob.setRadius(10);
knob.setFillColor(sf::Color::Red);
updateKnobPosition();
}
float Slider::getValue() const {
return value;
}
void Slider::setValueChangedCallback(std::function<void(float, std::vector<Boid>&)> callback) {
valueChangedCallback = callback;
}
void Slider::handleEvent(sf::Event event) {
if(event.type == sf::Event::MouseButtonPressed && event.mouseButton.button == sf::Mouse::Left) {
sf::Vector2f mousePos(event.mouseButton.x, event.mouseButton.y);
if(knob.getGlobalBounds().contains(mousePos)) {
dragging = true;
}
} else if(event.type == sf::Event::MouseButtonReleased && event.mouseButton.button == sf::Mouse::Left) {
dragging = false;
} else if(event.type == sf::Event::MouseMoved && dragging) {
float mouseX = static_cast<float>(event.mouseMove.x);
float position = std::max(slider.getPosition().x, std::min(slider.getPosition().x + slider.getSize().x, mouseX));
value = minValue + (position - slider.getPosition().x) / slider.getSize().x * (maxValue - minValue);
updateKnobPosition();
if(valueChangedCallback) {
valueChangedCallback(value, boids);
}
}
}
void Slider::updateKnobPosition() {
float percentage = (value - minValue) / (maxValue - minValue);
float knobPosition = slider.getPosition().x + percentage * slider.getSize().x;
knob.setPosition(knobPosition - knob.getRadius(), slider.getPosition().y - knob.getRadius());
}
void Slider::draw(sf::RenderWindow& window) const {
window.draw(slider);
window.draw(knob);
}