Using SDL_GetWindowFromID()

Using SDL_GetWindowFromID() allows you to retrieve an SDL_Window* based on the windowID associated with events like SDL_WindowEvent.

This is particularly helpful when working with multiple windows, as it ensures you're acting on the correct window without needing to manually track pointers.

Here's how we retrieve a window from its ID within an event handler:

1void HandleWindowEvent(const SDL_WindowEvent& e) {
2  SDL_Window* window =
3    SDL_GetWindowFromID(e.windowID);
4  if (window) {
5    SDL_SetWindowTitle(window, "Event Handled");
6  }
7}

Benefits

• Event-Driven Code: Avoids manually managing window pointers in global variables.
• Simpler Multi-Window Logic: Automatically finds the right window based on the event.
• Error Handling: Returns nullptr if the ID is invalid, allowing you to handle errors gracefully.

Using SDL_GetWindowFromID() simplifies multi-window management and reduces bugs in complex applications.