• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0

SFML Mouse event

1 post in this topic


I'm having an issue trying to get my button to change image when the mouse is hovering over it, i don't know where I am going wrong was hoping some could help.

The button does display, but does not change when the mouse is over it.

My class is like this:

[b][u]For some reason, i cannot get the code to display properly... can a mod please check if this is a bug.[/u][/b]

[source lang="cpp"]

#include <SFML/Graphics.hpp>
#include <string>

class Button
int m_x, m_y;
int m_w, m_h;

Button(int x, int y)
m_x = x;
m_y = y;

bool IsIn( int mouseX, int mouseY )
if (((mouseX > m_x) &amp;amp;&amp;amp; (mouseX < m_x + m_w))
&amp;amp;&amp;amp; ((mouseY > m_y) &amp;amp;&amp;amp; (mouseY < m_y + m_h ) ) ) {
return true;
} else {
return false;

void RenderBttn(sf::RenderWindow &amp;amp;destination,int mouseX, int mouseY)
std::string img = "button.png";
sf::Texture button;
if (!button.loadFromFile(img)){

std::string img_on = "button_on.png";
sf::Texture button_on;
if (!button.loadFromFile(img_on)){

sf::Sprite sprite(button);
m_w = sprite.getLocalBounds().width;
m_h = sprite.getLocalBounds().height;

sf::Sprite sprite(button_on);
} else {
sf::Sprite sprite(button);



I should note im not sure if my approach is the best way ??

My main loop has:

[source lang="cpp"]

Button btn_quit(window.getSize().y/2, 200);

// Start the loop
while (window.isOpen())
// Process events
sf::Event event;
while (window.pollEvent(event))
// Close window : exit
if (event.type == sf::Event::Closed) {

// Clear screen

// Draw the background sprites

//render the button also check the mouse position

// Update the window


Hope you can help [img]http://public.gamedev.net//public/style_emoticons/default/smile.png[/img] Edited by thefollower

Share this post

Link to post
Share on other sites
You can't use [i]event.mouseMove.x[/i] and [i]event.mouseMove.y[/i] outside of your "[i]while(window.pollEvent(event))[/i]" loop.

You can [b]*only*[/b] use those member variables within the loop, and [b]*only*[/b] if "[i]event.type == sf::Event::MouseMoved[/i]" for that specific iteration of the loop.
[url="http://www.sfml-dev.org/tutorials/2.0/window-events.php"]SFML 2.0 tutorial: Window events[/url]

How about adding a "[i]UpdateMousePos(int mouseX, int mouseY)[/i]" function to your button class to read and store the location of the mouse?
Then [u]within your poll-event loop[/u], and only when "event.type == sf::Event::MouseMoved", you could call [i]button.[/i][i]UpdateMousePos[/i][i](event.mouseMove.x, event.mouseMove.y); [/i]to update the button's view of the last known mouse position.

Or you could just use the global function [url="http://www.sfml-dev.org/documentation/2.0/classsf_1_1Mouse.php"]sf::Mouse::getPosition()[/url] within your button, without worrying about all that - it'd be the easiest option.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
Followers 0