SDL and C keyboard or touch event - c

Question

I'm programming in c4droid but I can't get the touch event to work.
Tried switch or if statement but nothing works im sure rendering is ok because if I delete the switch then its renders normally
Here I the code:
#include <SDL2/SDL.h>
int main()
{
SDL_Window *window = NULL;
window = SDL_CreateWindow("Shooter", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN);
// Setup renderer
SDL_Renderer *renderer = NULL;
renderer = SDL_CreateRenderer(window, 0, SDL_RENDERER_ACCELERATED);
// Set render color to red ( background will be rendered in this color )
SDL_SetRenderDrawColor(renderer, 0, 255, 25, 255);
// Clear winow
SDL_RenderClear(renderer);
// Creat a rect at pos ( 50, 50 ) that's 50 pixels wide and 50 pixels
// high.
SDL_SetRenderDrawColor(renderer, 255, 0, 255, 255);
SDL_Rect r;
r.x = 500;
r.y = 500;
r.w = 50;
r.h = 50;
SDL_Rect e;
e.x = 5;
e.y = 5;
e.w = 50;
e.h = 50;
SDL_Event event;
while(SDL_PollEvent(&event) != 0) {
switch (event.type) {
case SDL_FINGERDOWN :
e.x = e.x + 10;
SDL_RenderFillRect(renderer, &r);
SDL_RenderFillRect(renderer, &e);
SDL_RenderPresent(renderer);
break;
}
}
// Wait for 5 sec
SDL_Delay(50000);
SDL_DestroyWindow(window);
SDL_Quit();
}

Answer 1

You need to make sure to poll the event.
while(true) {
while(SDL_PollEvent(&event) != 0) {
switch (event.type) {
case SDL_FINGERDOWN :
e.x = e.x + 10;
SDL_RenderFillRect(renderer, &r);
SDL_RenderFillRect(renderer, &e);
SDL_RenderPresent(renderer);
break;
// Render rect
}
}
}
Provided event is not NULL, SDL_PollEvent will take the next event from the queue and store it in the SDL_Event that event is pointing at.
Edit: Don't remove the while(true) loop, put this one inside it. Sorry, I probably should have been a bit more clear in the beginning.