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Add a basic mouse grab mode

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Take 2 of 587eb48f61. We now implement
this at the SDL level, which works cross-platform and allows us to
ensure that the guest never gets the Control-G event.
This commit is contained in:
Mihai Parparita 2024-02-29 22:58:50 -08:00
parent 229509a067
commit bfbf4cb453
1 changed files with 31 additions and 0 deletions
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31
core/hostevents_sdl.cpp
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@ -29,6 +29,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
EventManager* EventManager::event_manager;
static int get_sdl_event_key_code(const SDL_KeyboardEvent &event);
static void toggle_mouse_grab(const SDL_KeyboardEvent &event);
void EventManager::poll_events()
{
@ -52,6 +53,14 @@ void EventManager::poll_events()
case SDL_KEYDOWN:
case SDL_KEYUP: {
// Internal shortcuts to trigger mouse grab, intentionally not
// sent to the host.
if (event.key.keysym.sym == SDLK_g && SDL_GetModState() == KMOD_LCTRL) {
if (event.type == SDL_KEYUP) {
toggle_mouse_grab(event.key);
}
return;
}
int key_code = get_sdl_event_key_code(event.key);
if (key_code != -1) {
KeyboardEvent ke;
@ -277,3 +286,25 @@ static int get_sdl_event_key_code(const SDL_KeyboardEvent &event)
}
return -1;
}
static void toggle_mouse_grab(const SDL_KeyboardEvent &event) {
SDL_Window *window = SDL_GetWindowFromID(event.windowID);
if (SDL_GetRelativeMouseMode()) {
SDL_SetRelativeMouseMode(SDL_FALSE);
SDL_SetWindowTitle(window, "DingusPPC Display");
} else {
// If the mouse is initially outside the window, move it to the middle,
// so that clicks are handled by the window (instead making it lose
// focus, at least with macOS hosts).
int mouse_x, mouse_y, window_x, window_y, window_width, window_height;
SDL_GetGlobalMouseState(&mouse_x, &mouse_y);
SDL_GetWindowPosition(window, &window_x, &window_y);
SDL_GetWindowSize(window, &window_width, &window_height);
if (mouse_x < window_x || mouse_x >= window_x + window_width ||
mouse_y < window_y || mouse_y >= window_y + window_height) {
SDL_WarpMouseInWindow(window, window_width / 2, window_height / 2);
}
SDL_SetRelativeMouseMode(SDL_TRUE);
SDL_SetWindowTitle(window, "DingusPPC Display (Mouse Grabbed)");
}
}