Auto-Focus Windows on Mouse Hover

Yes, you can implement auto-focus behavior by monitoring mouse focus events and calling SDL_RaiseWindow() when your window gains mouse focus.

However, be cautious with this approach - automatically stealing focus can be frustrating for users, especially if they're trying to multitask. Here's how to implement it:

1#include <SDL.h>
2#include <iostream>
3#include "Window.h"
4
5void HandleWindowEvent(SDL_WindowEvent& E,
6                       SDL_Window* Window) {
7  if (E.event == SDL_WINDOWEVENT_ENTER) {
8    SDL_RaiseWindow(Window); 
9    std::cout << "Window raised to front\n";
10  }
11}
12
13int main(int argc, char** argv) {
14  SDL_Init(SDL_INIT_VIDEO);
15  Window GameWindow;
16  SDL_Event E;
17
18  while (true) {
19    while (SDL_PollEvent(&E)) {
20      if (E.type == SDL_WINDOWEVENT) {
21        HandleWindowEvent(E.window,
22                          GameWindow.SDLWindow);
23      }
24    }
25    GameWindow.Update();
26  }
27
28  SDL_Quit();
29  return 0;
30}

1Window raised to front
2Window raised to front

Consider these alternatives that might be more user-friendly:

• Only auto-focus when the window is in a specific state (e.g., during gameplay)
• Add a toggle in your settings menu to enable/disable auto-focus
• Use a visual indicator when the window needs attention rather than forcing focus
• Only auto-focus if the window has been explicitly unfocused by another application

Remember that different operating systems handle window focus differently, so test thoroughly on all your target platforms.