int
SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid,
SDL_bool down, float x, float y, float pressure)
{
int posted;
SDL_Finger *finger;
SDL_Touch* touch = SDL_GetTouch(id);
if (!touch) {
return -1;
}
finger = SDL_GetFinger(touch, fingerid);
if (down) {
if (finger) {
/* This finger is already down */
return 0;
}
if (SDL_AddFinger(touch, fingerid, x, y, pressure) < 0) {
return 0;
}
posted = 0;
if (SDL_GetEventState(SDL_FINGERDOWN) == SDL_ENABLE) {
SDL_Event event;
event.tfinger.type = SDL_FINGERDOWN;
event.tfinger.touchId = id;
event.tfinger.fingerId = fingerid;
event.tfinger.x = x;
event.tfinger.y = y;
event.tfinger.dx = 0;
event.tfinger.dy = 0;
event.tfinger.pressure = pressure;
posted = (SDL_PushEvent(&event) > 0);
}
} else {
if (!finger) {
/* This finger is already up */
return 0;
}
posted = 0;
if (SDL_GetEventState(SDL_FINGERUP) == SDL_ENABLE) {
SDL_Event event;
event.tfinger.type = SDL_FINGERUP;
event.tfinger.touchId = id;
event.tfinger.fingerId = fingerid;
/* I don't trust the coordinates passed on fingerUp */
event.tfinger.x = finger->x;
event.tfinger.y = finger->y;
event.tfinger.dx = 0;
event.tfinger.dy = 0;
event.tfinger.pressure = pressure;
posted = (SDL_PushEvent(&event) > 0);
}
SDL_DelFinger(touch, fingerid);
}
return posted;
}
int
SDL_SendFingerDown(SDL_TouchID id, SDL_FingerID fingerid, SDL_bool down,
float xin, float yin, float pressurein)
{
int posted;
Uint16 x;
Uint16 y;
Uint16 pressure;
SDL_Finger *finger;
SDL_Touch* touch = SDL_GetTouch(id);
if(!touch) {
return SDL_TouchNotFoundError(id);
}
//scale to Integer coordinates
x = (Uint16)((xin+touch->x_min)*(touch->xres)/(touch->native_xres));
y = (Uint16)((yin+touch->y_min)*(touch->yres)/(touch->native_yres));
pressure = (Uint16)((pressurein+touch->pressure_min)*(touch->pressureres)/(touch->native_pressureres));
finger = SDL_GetFinger(touch,fingerid);
if(down) {
if(finger == NULL) {
SDL_Finger nf;
nf.id = fingerid;
nf.x = x;
nf.y = y;
nf.pressure = pressure;
nf.xdelta = 0;
nf.ydelta = 0;
nf.last_x = x;
nf.last_y = y;
nf.last_pressure = pressure;
nf.down = SDL_FALSE;
if(SDL_AddFinger(touch,&nf) < 0) return 0;
finger = SDL_GetFinger(touch,fingerid);
}
else if(finger->down) return 0;
if(xin < touch->x_min || yin < touch->y_min) return 0; //should defer if only a partial input
posted = 0;
if (SDL_GetEventState(SDL_FINGERDOWN) == SDL_ENABLE) {
SDL_Event event;
event.tfinger.type = SDL_FINGERDOWN;
event.tfinger.touchId = id;
event.tfinger.x = x;
event.tfinger.y = y;
event.tfinger.dx = 0;
event.tfinger.dy = 0;
event.tfinger.pressure = pressure;
event.tfinger.state = touch->buttonstate;
event.tfinger.windowID = touch->focus ? touch->focus->id : 0;
event.tfinger.fingerId = fingerid;
posted = (SDL_PushEvent(&event) > 0);
}
if(posted) finger->down = SDL_TRUE;
return posted;
}
else {
if(finger == NULL) {
SDL_SetError("Finger not found.");
return 0;
}
posted = 0;
if (SDL_GetEventState(SDL_FINGERUP) == SDL_ENABLE) {
SDL_Event event;
event.tfinger.type = SDL_FINGERUP;
event.tfinger.touchId = id;
event.tfinger.state = touch->buttonstate;
event.tfinger.windowID = touch->focus ? touch->focus->id : 0;
event.tfinger.fingerId = fingerid;
//I don't trust the coordinates passed on fingerUp
event.tfinger.x = finger->x;
event.tfinger.y = finger->y;
event.tfinger.dx = 0;
event.tfinger.dy = 0;
event.tfinger.pressure = pressure;
if(SDL_DelFinger(touch,fingerid) < 0) return 0;
posted = (SDL_PushEvent(&event) > 0);
}
return posted;
}
}
