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[rcore] Fix real touch gestures for `PLATFORM_DESKTOP_SDL` (#3614) 

* Fix touch gestures for PLATFORM_DESKTOP_SDL

* Complement note and optimization

* Events optimization

* Optimize gesture handling

* Reverts previous commit and fixes GESTURE_DRAG to not trigger GESTURE_SWIPE* when it ends

* Reapply previous gesture handling optimization also fixing GESTURE_DRAG to not trigger GESTURE_SWIPE* when it ends
This commit is contained in:
ubkp 2023-12-11 04:57:51 -03:00 committed by GitHub
parent 28bdaa2da6
commit ed8a18ea64
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 13 deletions
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37
src/platforms/rcore_desktop_sdl.c
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@ -996,7 +996,7 @@ void PollInputEvents(void)
CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
int touchAction = -1; // 0-TOUCH_ACTION_UP, 1-TOUCH_ACTION_DOWN, 2-TOUCH_ACTION_MOVE
bool gestureUpdate = false; // Flag to note gestures require to update
bool realTouch = false; // Flag to differentiate real touch gestures from mouse ones
// Register previous keys states
// NOTE: Android supports up to 260 keys
@ -1141,7 +1141,6 @@ void PollInputEvents(void)
CORE.Input.Touch.currentTouchState[btn] = 1;
touchAction = 1;
gestureUpdate = true;
} break;
case SDL_MOUSEBUTTONUP:
{
@ -1155,7 +1154,6 @@ void PollInputEvents(void)
CORE.Input.Touch.currentTouchState[btn] = 0;
touchAction = 0;
gestureUpdate = true;
} break;
case SDL_MOUSEWHEEL:
{
@ -1178,32 +1176,38 @@ void PollInputEvents(void)
CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
touchAction = 2;
gestureUpdate = true;
} break;
// Check touch events
// NOTE: These cases need to be reviewed on a real touch screen
case SDL_FINGERDOWN:
{
CORE.Input.Touch.currentTouchState[event.tfinger.fingerId] = 1;
const int touchId = (int)event.tfinger.fingerId;
CORE.Input.Touch.currentTouchState[touchId] = 1;
CORE.Input.Touch.position[touchId].x = event.tfinger.x * CORE.Window.screen.width;
CORE.Input.Touch.position[touchId].y = event.tfinger.y * CORE.Window.screen.height;
touchAction = 1;
gestureUpdate = true;
realTouch = true;
} break;
case SDL_FINGERUP:
{
CORE.Input.Touch.currentTouchState[event.tfinger.fingerId] = 0;
const int touchId = (int)event.tfinger.fingerId;
CORE.Input.Touch.currentTouchState[touchId] = 0;
CORE.Input.Touch.position[touchId].x = event.tfinger.x * CORE.Window.screen.width;
CORE.Input.Touch.position[touchId].y = event.tfinger.y * CORE.Window.screen.height;
touchAction = 0;
gestureUpdate = true;
realTouch = true;
} break;
case SDL_FINGERMOTION:
{
CORE.Input.Touch.position[event.tfinger.fingerId].x = (float)event.motion.x;
CORE.Input.Touch.position[event.tfinger.fingerId].y = (float)event.motion.y;
const int touchId = (int)event.tfinger.fingerId;
CORE.Input.Touch.position[touchId].x = event.tfinger.x * CORE.Window.screen.width;
CORE.Input.Touch.position[touchId].y = event.tfinger.y * CORE.Window.screen.height;
touchAction = 2;
gestureUpdate = true;
realTouch = true;
} break;
// Check gamepad events
@ -1228,7 +1232,7 @@ void PollInputEvents(void)
}
#if defined(SUPPORT_GESTURES_SYSTEM)
if (gestureUpdate)
if (touchAction > -1)
{
// Process mouse events as touches to be able to use mouse-gestures
GestureEvent gestureEvent = { 0 };
@ -1243,7 +1247,7 @@ void PollInputEvents(void)
gestureEvent.pointCount = 1;
// Register touch points position, only one point registered
if (touchAction == 2) gestureEvent.position[0] = CORE.Input.Touch.position[0];
if (touchAction == 2 || realTouch) gestureEvent.position[0] = CORE.Input.Touch.position[0];
else gestureEvent.position[0] = GetMousePosition();
// Normalize gestureEvent.position[0] for CORE.Window.screen.width and CORE.Window.screen.height
@ -1252,6 +1256,8 @@ void PollInputEvents(void)
// Gesture data is sent to gestures-system for processing
ProcessGestureEvent(gestureEvent);
touchAction = -1;
}
#endif
}
@ -1404,6 +1410,11 @@ int InitPlatform(void)
//if (platform.gamepadgamepad == NULL) TRACELOG(LOG_WARNING, "PLATFORM: Unable to open game controller [ERROR: %s]", SDL_GetError());
}
// Disable mouse events being interpreted as touch events
// NOTE: This is wanted because there are SDL_FINGER* events available which provide unique data
// Due to the way PollInputEvents() and rgestures.h are currently implemented, setting this won't break SUPPORT_MOUSE_GESTURES
SDL_SetHint(SDL_HINT_TOUCH_MOUSE_EVENTS, "0");
SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
//----------------------------------------------------------------------------