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uncapture

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This commit is contained in:
Romain Vimont 2022-01-01 12:10:55 +01:00
commit 4bd6c58aea
2 changed files with 42 additions and 0 deletions
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39
app/src/screen.c
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@ -366,6 +366,7 @@ screen_init(struct screen *screen, const struct screen_params *params) {
screen->maximized = false; screen->maximized = false;
screen->event_failed = false; screen->event_failed = false;
screen->mouse_captured = false; screen->mouse_captured = false;
screen->uncapture_key_pressed = 0;
static const struct sc_video_buffer_callbacks cbs = { static const struct sc_video_buffer_callbacks cbs = {
.on_new_frame = sc_video_buffer_on_new_frame, .on_new_frame = sc_video_buffer_on_new_frame,
@ -753,6 +754,11 @@ screen_resize_to_pixel_perfect(struct screen *screen) {
content_size.height); content_size.height);
} }
static inline bool
screen_is_uncapture_key(SDL_Keycode key) {
return key == SDLK_LALT || key == SDLK_LGUI || key == SDLK_RGUI;
}
bool bool
screen_handle_event(struct screen *screen, SDL_Event *event) { screen_handle_event(struct screen *screen, SDL_Event *event) {
switch (event->type) { switch (event->type) {
@ -802,6 +808,39 @@ screen_handle_event(struct screen *screen, SDL_Event *event) {
break; break;
} }
return true; return true;
case SDL_KEYDOWN:
if (screen->im.mp->relative_mode && screen->mouse_captured) {
SDL_Keycode key = event->key.keysym.sym;
if (screen_is_uncapture_key(key)) {
if (!screen->uncapture_key_pressed) {
screen->uncapture_key_pressed = key;
return true;
} else {
// Another uncapture key has been pressed, cancel mouse
// uncapture
screen->uncapture_key_pressed = 0;
// Do not return, the event must be forwarded to the
// input manager
}
}
}
break;
case SDL_KEYUP:
if (screen->im.mp->relative_mode && screen->mouse_captured) {
SDL_Keycode key = event->key.keysym.sym;
SDL_Keycode uncapture_key_pressed =
screen->uncapture_key_pressed;
screen->uncapture_key_pressed = 0;
if (key == uncapture_key_pressed) {
// An uncapture key has been pressed then released:
// uncapture the mouse
screen_capture_mouse(screen, false);
return true;
}
// Do not return, the event must be forwarded to the input
// manager
}
break;
case SDL_MOUSEWHEEL: case SDL_MOUSEWHEEL:
case SDL_MOUSEMOTION: case SDL_MOUSEMOTION:
case SDL_MOUSEBUTTONDOWN: case SDL_MOUSEBUTTONDOWN:

3
app/src/screen.h
View file

@ -52,6 +52,9 @@ struct screen {
bool event_failed; // in case SDL_PushEvent() returned an error bool event_failed; // in case SDL_PushEvent() returned an error
bool mouse_captured; // only relevant in relative mouse mode bool mouse_captured; // only relevant in relative mouse mode
// To disable mouse capture, an uncapture key (LALT, LGUI or RGUI) must be
// pressed. This variable tracks the pressed mod key.
SDL_Keycode uncapture_key_pressed;
AVFrame *frame; AVFrame *frame;
}; };