Messages

1

General / Re: Drag and Drop from a Vector of Shapes

« on: August 25, 2020, 06:28:32 pm »

How do I make sure that I'm selecting the element which the mouse has clicked on?

2

General / Drag and Drop from a Vector of Shapes

« on: August 23, 2020, 05:35:11 pm »

Hi. Looking to be able to drag and drop shapes from a vector, but I'm finding that when dragging one of the shapes I instead drag all of the shapes from the vector to the mouse position instead of just the single shape. Was wondering how I can drag the one shape without affecting the others?

#include <iostream>
#include "SFML/Graphics.hpp"
#include "Shape.h"
#include <vector>

int main()
{
    sf::RenderWindow window(sf::VideoMode(1280, 800), "SFML Game");

    sf::Event event;

    bool mouseClicked = false;
    bool mouseInsideRect = false;
    bool dragging = false;

    sf::Vector2f mouseRectOffset;

    int mouseX = 0;
    int mouseY = 0;

    std::vector<Shape> shapeVec;

    while (window.isOpen())
    {
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Space)
            {
                Shape shape(window.getSize());
                shapeVec.push_back(shape);
            }

            if (event.type == sf::Event::MouseButtonPressed && event.mouseButton.button == sf::Mouse::Left)
            {
                mouseClicked = true;

                for (int i = 0; i < shapeVec.size(); i++)
                {
                    dragging = true;
                    mouseRectOffset.x = event.mouseButton.x - shapeVec[i].GetShape().getGlobalBounds().left - shapeVec[i].GetShape().getOrigin().x;
                    mouseRectOffset.y = event.mouseButton.x - shapeVec[i].GetShape().getGlobalBounds().top - shapeVec[i].GetShape().getOrigin().y;
                }
            }

            if (event.type == sf::Event::MouseButtonReleased && event.mouseButton.button == sf::Mouse::Left)
            {
                mouseClicked = false;
                dragging = false;
            }

            if (event.type == sf::Event::MouseMoved)
            {
                mouseX = event.mouseMove.x;
                mouseY = event.mouseMove.y;
            }
        }

        if (dragging == true)
        {
            for (int i = 0; i < shapeVec.size(); i++)
            {
                shapeVec[i].SetPos(mouseX - mouseRectOffset.x, mouseY - mouseRectOffset.y);
            }
        }

        window.clear();

        for (int i = 0; i < shapeVec.size(); i++)
        {
            shapeVec[i].Draw(window);
        }

        window.display();
    }

    return 0;
}