System Events

In this tutorial you will learn one of the ways to handle system events in EGE.

There are some ways to handle keyboard events:

• Inheriting from GUIScreen and override on(Event)() functions - more suitable for custom GUI screens
• Inheriting from (Default)SystemEventHandler and registering it in GameLoop - more suitable for global events (like game keybinds) The first way will be described in (More about User Interface...) chapter.

EGE::SystemEventHandler

The basic class for creating event handlers is EGE::SystemEventHandlers. Again, you must to inherit this class:

class MyEventHandler : public EGE::SystemEventHandler
{
public:
    virtual void onMouseButtonPress(sf::Event::MouseButtonEvent& event) override
    {
        //...
    }
};

Now you can place some code to event handler:

if(event.button == sf::Mouse::Left)
{
    // Add new object.
    auto scene = MyGameLoop::instance().scene;
    scene->addNewObject<MyObject>(scene);
}