SDL uses windowID
fields in events to track which window triggered an event. Most SDL events, like SDL_MouseButtonEvent
or SDL_WindowEvent
, include a windowID
field that uniquely identifies the window involved.
This allows programs to distinguish events from different windows in a shared event loop.
For example, to handle a SDL_WINDOWEVENT
specifically for one window:
void HandleWindowEvent(SDL_WindowEvent& E) {
if (E.windowID == SDL_GetWindowID(MyWindow)) {
// Handle events for MyWindow
}
}
The SDL_GetWindowFromID()
function retrieves the SDL_Window*
pointer from a windowID
. This is useful for centralized event handling in applications managing multiple windows.
By mapping events to specific windows, SDL ensures precise and efficient event handling, enabling complex multi-window applications.
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