breakout/settings.c

#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <stdbool.h>

#include "settings.h"

#define Slider_height 100
#define Scalar_width 20
#define Bar_width 400
#define round(x)    ((int) ((x) + .5))

SDL_Texture* Settings_Texture;
SDL_Texture* Settings_Ball_Texture;

SDL_Rect Settings_rect;
SDL_Rect Settings_Ball_rect;
Slider BV;
Slider BS;
Slider BT;

bool Settings_IsInit=false;

void Settings_Initialize (SDL_Renderer* renderer) {
  Initialize_Slider(400,300,Scalar_width,Bar_width,Slider_height,1,2,&BV);
  Initialize_Slider(400,500,Scalar_width,Bar_width,Slider_height,10.0f,20.0f,&BS);
  Initialize_Slider(400,700,Scalar_width,Bar_width,Slider_height,0,1,&BT);
  Settings_Texture = IMG_LoadTexture(renderer, "assets/images/settings_title.png");
  Settings_rect = (SDL_Rect){.x = 800, .y = 130, .w=470, .h=150};
  Settings_Ball_Texture = IMG_LoadTexture(renderer, "assets/images/ball.png");
  Settings_Ball_rect = (SDL_Rect){.x = 1200, .y = 300, .w=100, .h=100};
  Settings_IsInit = true;
}

void Settings_Draw (SDL_Renderer* renderer,Scenery* scenery) {
  double x;
  SDL_RenderCopy(renderer, Settings_Texture, NULL, &Settings_rect);
  SDL_RenderCopy(renderer, Settings_Ball_Texture, NULL, &Settings_Ball_rect);
  Draw_Slider(renderer,&BV);
  Draw_Slider(renderer,&BS);
  Draw_Slider(renderer,&BT);
  Draw_Ballstate(renderer,scenery);
  mapping(&x,&BS);
  scenery->ball.Speed=x;
  mapping(&x,&BT);
  x=round(x);
  scenery->ball.TextureIndex=x;
}

void Settings_Deinitialize(){
  if(Settings_IsInit){
    SDL_DestroyTexture(Settings_Texture);
    SDL_DestroyTexture(Settings_Ball_Texture);
    Settings_IsInit=false;
  }
}

void Draw_Slider(SDL_Renderer* renderer,Slider* beta){
  SDL_SetRenderDrawColor(renderer,255,255,255,255);
  SDL_RenderDrawRect(renderer,&beta->Bar_rect);
  int x,y;
  Uint32 Mousestate=SDL_GetMouseState(&x,&y);
  if(y<=((beta->Bar_rect.y)+(beta->Bar_rect.h))&&y>=(beta->Bar_rect.y)&&x<=(beta->Bar_rect.w+beta->Bar_rect.x)&&x>=(beta->Bar_rect.x)&&(Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT))){
    SDL_RenderFillRect(renderer,&beta->Scalar_rect);
    SDL_RenderDrawRect(renderer,&beta->Scalar_rect);
    if(x>(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w)/2)){
      beta->Scalar_rect.x=(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w));
      beta->Slider_value=(beta->Bar_rect.x+beta->Bar_rect.w-(beta->Scalar_rect.w)/2);
    }
    else if(x<beta->Bar_rect.x+(beta->Scalar_rect.w)/2){
      beta->Scalar_rect.x=beta->Bar_rect.x;
      beta->Slider_value=beta->Bar_rect.x+(beta->Scalar_rect.w)/2;
    }
    else{
      beta->Scalar_rect.x=x-(beta->Scalar_rect.w/2);
      beta->Slider_value=x;
    }
  }
  else{
    SDL_RenderDrawRect(renderer,&beta->Scalar_rect);
  }
}

void Draw_Ballstate(SDL_Renderer* renderer,Scenery* scenery){
    BALL_Draw(renderer, &(scenery->ball));
}

void mapping(double *x,Slider* beta){
  *x=((beta->max-beta->min)/(beta->Bar_rect.w-(beta->Scalar_rect.w)))*(beta->Slider_value-beta->Bar_rect.x-beta->Scalar_rect.w/2)+beta->min;
}

void Initialize_Slider(int x,int y,int sw,int bw,int h,double min,double max,Slider* beta){
  beta->Scalar_rect = (SDL_Rect){.x=x,.y=y,.w=sw,.h=h};
  beta->Bar_rect =  (SDL_Rect){.x=x,.y=y,.w=bw,.h=h};
  beta->max=max;
  beta->min=min;
  beta->Slider_value=x+beta->Scalar_rect.w/2;
}