Function glfw_scroll_callback

leif.c:1541–1583

  state.mb_ev.button_code = button;
}
void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset) {
  (void)window;
  // Setting the scroll values
  state.input.mouse.xscroll_delta = xoffset;
  state.input.mouse.yscroll_delta = yoffset;

  // Calling user defined callbacks
  for(uint32_t i = 0; i< state.input.scroll_cb_count; i++) {
    state.input.scroll_cbs[i](window, xoffset, yoffset);
  }
  // Populating the scroll event
  state.scr_ev.happened = true;
  state.scr_ev.xoffset = xoffset;
  state.scr_ev.yoffset = yoffset;


  // Scrolling the current div
  LfDiv* selected_div = &state.selected_div;
  if(!selected_div->scrollable) return;
  if((state.grabbed_div.id != -1 && selected_div->id != state.grabbed_div.id)) return;

  if(yoffset < 0.0f) {
    if(selected_div->total_area.y > (selected_div->aabb.size.y + selected_div->aabb.pos.y)) { 
      if(state.theme.div_smooth_scroll) {
        *state.scroll_velocity_ptr -= state.theme.div_scroll_acceleration;
        state.div_velocity_accelerating = true;
      } else {
        *state.scroll_ptr -= state.theme.div_scroll_amount_px;
      }
    } 
  } else if (yoffset > 0.0f) {
    if(*state.scroll_ptr) {
      if(state.theme.div_smooth_scroll) {
        *state.scroll_velocity_ptr += state.theme.div_scroll_acceleration;
        state.div_velocity_accelerating = false;
      } else {
        *state.scroll_ptr += state.theme.div_scroll_amount_px;
      }
    }        
  }
  if(state.theme.div_smooth_scroll)
    *state.scroll_velocity_ptr = MIN(MAX(*state.scroll_velocity_ptr, -state.theme.div_scroll_max_velocity), state.theme.div_scroll_max_velocity);
}
void glfw_cursor_callback(GLFWwindow* window, double xpos, double ypos) {
  (void)window;
  LfMouse* mouse = &state.input.mouse;