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Use translationInView for mouse wheel event

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Deve 2022-10-18 21:02:49 +02:00 committed by Sam Lantinga
parent c3b13346e0
commit 2ebaafa6c9
1 changed files with 24 additions and 13 deletions
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37
src/video/uikit/SDL_uikitview.m
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@ -455,25 +455,36 @@ extern int SDL_AppleTVRemoteOpenedAsJoystick;
#endif /* TARGET_OS_TV || defined(__IPHONE_9_1) */
static CGPoint translation_old = (CGPoint){ 0.0, 0.0 };
-(void)mouseWheelGesture:(UIPanGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateBegan ||
gesture.state == UIGestureRecognizerStateChanged ||
gesture.state == UIGestureRecognizerStateEnded) {
CGPoint velocity = [gesture velocityInView:self];
gesture.state == UIGestureRecognizerStateChanged) {
if (velocity.x > 0.0f) {
velocity.x = -1.0;
} else if (velocity.x < 0.0f) {
velocity.x = 1.0f;
CGPoint translation = [gesture translationInView:self];
CGPoint mouse_wheel = translation;
if (gesture.state == UIGestureRecognizerStateChanged) {
mouse_wheel.x -= translation_old.x;
mouse_wheel.y -= translation_old.y;
}
if (velocity.y > 0.0f) {
velocity.y = -1.0;
} else if (velocity.y < 0.0f) {
velocity.y = 1.0f;
translation_old = translation;
if (mouse_wheel.x > 0.0f) {
mouse_wheel.x = 1.0;
} else if (mouse_wheel.x < 0.0f) {
mouse_wheel.x = -1.0f;
}
if (velocity.x != 0.0f || velocity.y != 0.0f) {
SDL_SendMouseWheel(sdlwindow, 0, velocity.x, velocity.y, SDL_MOUSEWHEEL_NORMAL);
if (mouse_wheel.y > 0.0f) {
mouse_wheel.y = 1.0;
} else if (mouse_wheel.y < 0.0f) {
mouse_wheel.y = -1.0f;
}
if (mouse_wheel.x != 0.0f || mouse_wheel.y != 0.0f) {
SDL_SendMouseWheel(sdlwindow, 0, mouse_wheel.x, mouse_wheel.y, SDL_MOUSEWHEEL_NORMAL);
}
}
}